Emerson Liebert EXM User Manual

Liebert® eXM

User Manual–60-100kVA, 50/60Hz

™

TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.0 I

NSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.1 Initial Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.1 Storing for Delayed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.1 Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 UPS Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.1 Positioning the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.2 Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.4 Considerations in Moving the Liebert eXM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.5 Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5.2 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.5.3 Floor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.5.4 Cable Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.6 Auxiliary Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.7 Liebert Power Module Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.8 Static Bypass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.0 ELECTRICAL CONNECTIONS—UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3.1 Power Cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1.1 Lug Size and Cable Rating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2 External Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2.1 Rectifier and Bypass Input Supply of the UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2.2 UPS Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2.3 UPS Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.2.4 UPS Input Configuration with Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2.5 Cabling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.2.6 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.2.7 Accessory Fuses and Back-Feed Breaker Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.2.8 Safety Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.2.9 Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.2.10 Cabling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3 Control Cables Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.3.1 Static Bypass Assembly Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.4 Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.4.1 Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.4.2 Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3.4.3 Liebert BDC Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.4.4 Battery Cabinet Interface Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.4.5 EPO Input—Optional. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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4.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.0 OPTION INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

5.1 Liebert IntelliSlot™ Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.2 Liebert IntelliSlot Web Card—SNMP/HTTP Network Interface Card. . . . . . . . . . . . . . . . . 37

5.2.1 Liebert IntelliSlot™ Unity Cards—IS-UNITY-LIFE, IS-UNITY-S, IS-UNITY-DP . . . . . . . . 38

5.3 Liebert IntelliSlot Web Card—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.4 Liebert IntelliSlot

5.4.1 Liebert IntelliSlot Relay Card Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5.4.2 Liebert IntelliSlot

™

Relay Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

™

Relay Card Jumper Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.0 OPERATOR CONTROL AND DISPLAY PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

6.1 Operator Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.2 Mimic Display Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.3 Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.4 Alarm Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.5 LCD Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.6 Navigation Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.7 LCD Menus and Data Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.8 Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.9 Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.10 UPS History Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.11 Types of LCD Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.11.1 Opening Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.11.2 Default Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.11.3 UPS Help Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.11.4 Screen Saver Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.12 Pop-Up Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.12.1 From Bypass to Inverter Mode With Power Interruption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.12.2 From Inverter to Bypass Mode With Interruption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.12.3 System Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.12.4 Battery Capacity Test Confirmation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.12.5 Battery Self-Test Aborted, Condition Not Met . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.12.6 Battery Equalize Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.12.7 Battery Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.12.8 Battery Refresh Charge Aborted, Condition Not Met . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.12.9 Enter Control Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

7.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

7.1 Liebert eXM Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.2 UPS Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.2.1 Startup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7.2.2 Startup in ECO Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.2.3 Switching Between UPS Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.3 UPS Battery Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.4 Switching the UPS from Normal Operation to Maintenance Bypass . . . . . . . . . . . . . . . . . . 60

7.5 Switching the UPS from Maintenance Bypass to Normal Operation . . . . . . . . . . . . . . . . . . 62

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7.6 De-Energize Liebert eXM with Maintenance Bypass Cabinet. . . . . . . . . . . . . . . . . . . . . . . . 63

7.7 De-Energize Liebert eXM Without Maintenance Bypass Cabinet . . . . . . . . . . . . . . . . . . . . 64

7.8 Emergency Shutdown With EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

7.9 Auto Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

7.10 Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions . . . . . . . . . . 65

7.11 Battery Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

7.11.1 Battery Undervoltage Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

7.11.2 Battery End-of-Discharge (EOD) Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

7.12 OperationStatic Bypass Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.0 SPECIFICATIONS AND TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

8.1 Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.2 UPS Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.3 UPS Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

9.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

9.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9.2 Limited Life Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.3 Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.3.1 Record Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.3.2 Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.3.3 Torque Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.4 Detecting Trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.5 Reporting a Problem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.6 Corrective Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.7 Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

APPENDIX A-HAZARDOUS SUBSTANCES OR ELEMENTS ANNOUNCEMENT . . . . . . . . . . . . . . . . . .76

APPENDIX B-UPS STATUS MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

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FIGURES

Figure 1 UPS dimensions, center of gravity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 2 Cable entry locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 3 Cabinet arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 4 Liebert power module assembly indicators and controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 5 Static Bypass Assembly connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 6 Single UPS block diagram—Dual input, single source configuration, without bypass

cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 7 Single UPS block diagram—Dual input, single source configuration . . . . . . . . . . . . . . . . . . . . . . 18

Figure 8 Liebert eXM in a split bypass configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 9 Input busbars—Liebert eXM 60-100kVA frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 10 Accessory fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 11 Dual input back-feed breaker wiring when bypass distribution cabinet not used . . . . . . . . . . . . 23

Figure 12 Ground and neutral busbar connections—60-100kVA frame busbars. . . . . . . . . . . . . . . . . . . . . . 24

Figure 13 Static bypass assembly connections to display cabinet and options . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 14 Auxiliary terminal block detail (static switch assembly front panel) . . . . . . . . . . . . . . . . . . . . . . 27

Figure 15 Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 16 Output dry contacts and EPO wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 17 Battery cabinet interface—J22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 18 EPO wiring and signal names for J2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 19 Single UPS Remote Emergency Power Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 20 UPS dimensions—Front view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 21 UPS main components—Typical 60-100kVA unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 22 UPS cable connections—60-100kVA frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 23 Liebert IntelliSlot Web card display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 24 Pin location and numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 25 Jumper location and numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 26 Overview of control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 27 Mimic display indicators location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 28 Control button layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 29 Alarm buzzer location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 30 Sections of the LCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 31 Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 32 Language selection screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 33 Date and time screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 34 History log records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 35 Opening display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 36 Default screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 37 Screen saver window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 38 One-line diagram, single-input UPS with 3-breaker bypass distribution cabinet and

panelboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 39 Typical configuration for single UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 40 Air filter replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

iv

TABLES

Table 1 Center of gravity and weights for Liebert eXM 60-100kVA frame. . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 2 LED indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 3 Busbars—Power wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 4 Terminal block with compression lugs—Control wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 5 Input dry contacts—J26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 6 Output dry contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 7 Liebert BDC interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 8 Battery cabinet interface—J22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 9 EPO input contact relays—J2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 10 Liebert eXM communication options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 11 Relay card pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 12 Jumper connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 13 Descriptions of UPS operator control and display panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 14 Mimic display status indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 15 Control buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 16 Icons for navigation keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 17 UPS menus and data window items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 18 Mimic indicators after initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Table 19 Mimic indicators for normal mode operation with battery breaker open . . . . . . . . . . . . . . . . . . . 58

Table 20 Mimic indicators for normal mode operation with battery breaker closed . . . . . . . . . . . . . . . . . . 58

Table 21 Environmental requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 22 UPS mechanical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 23 UPS currents and terminals—Input (for single-input unit, 208V operation) . . . . . . . . . . . . . . . . 67

Table 24 UPS currents and terminals—Input (for dual-input unit only, 208V operation) . . . . . . . . . . . . . 67

Table 25 UPS currents and terminals—Bypass input (for dual-input units, 208V operation) . . . . . . . . . . 67

Table 26 UPS currents and terminals—Output 208V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 27 AC/AC efficiency, loss and air exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 28 Rectifier input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 29 Recommended lug sizes (compression type) M12, 1/2" bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 30 Battery cabinet system—UPS and Battery Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 31 Inverter output to critical load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 32 Bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 33 Component service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 34 Busbars—Power wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Table 35 Terminal block with compression lugs—Control wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Table 36 Recommended test equipment and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Table 37 Hazardous substances or elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Table 38 UPS status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

v

vi

IMPORTANT SAFETY INSTRUCTIONS

!

!

SAVE THESE INSTRUCTIONS

This manual contains important instructions that should be followed during installation of the
Liebert eXM.

Read this manual thoroughly, paying special attention to the sections that apply to your installation,
before working with the UPS. Retain this manual for use by installing personnel.

A properly trained and qualified electrical contractor should oversee the installation of the
equipment.

The Liebert eXM cannot be put into operation until it is commissioned by the manufacturer or
authorized engineer. Otherwise, human safety may be endangered and damage to the UPS will not be
covered by the warranty.

The Liebert eXM is designed for commercial and industrial uses and cannot be used as life support
equipment.

WARNING

Risk of electrical shock. Can cause personal injury or death.
This UPS has several circuits that are energized with high DC as well as AC voltages. Check

for voltage with both AC and DC voltmeters before working within the UPS. Check for voltage
with both AC and DC voltmeters before making contact.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should be involved in installing the UPS or preparing the UPS for
installation. When performing maintenance with any part of the equipment under power,
service personnel and test equipment should be standing on rubber mats.

In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.

Extreme caution is required when performing installation and maintenance.
Special safety precautions are required for procedures involving handling, installation and

maintenance of the UPS system. Observe all safety precautions in this manual before
handling or installing the UPS system. Observe all precautions before as well as during
performance of all maintenance procedures. Observe all DC safety precautions before working
on or near the DC system.

Important Safety Instructions

AVERTISSEMENT

Risque de décharge électrique pouvant causer des blessures graves, voire mortelles.
Ce système ASC comporte plusieurs circuits à haute tension c.a et c.c. Vérifiez les tensions au

moyen de voltmètres c.a. et c.c. avant d’utiliser le système ASC. Vérifiez les tensions avec des
voltmètres c.a. et c.c. avant d’établir tout contact.

Seuls des employés qualifiés et dûment formés portant un casque, des gants, des chaussures
et des lunettes de sécurité adéquats doivent se charger d’installer le système ASC ou de le
préparer pour l’installation.Les responsables de l’entretien et l’équipement d’essai doivent
reposer sur des tapis de caoutchouc lors de toute intervention sur une pièce d’équipement sous
tension.

En cas d’incendie associé à du matériel électrique, n’utilisez que des extincteurs à dioxyde de
carbone ou homologués pour la lutte contre les incendies d’origine électrique.

Les opérations d’installation et d’entretien requièrent une extrême prudence.
Des précautions de sécurité spéciales sont requises pour les procédures associées à la

manutention, à l’installation et à l’entretien du système ASC. Observez toutes les précautions
de sécurité décrites dans le présent manuel avant de manipuler ou d’installer le système ASC.
Observez également toutes les précautions avant et pendant toutes les procédures d’entretien.
Observez toutes les précautions de sécurité appropriées lorsque vous travaillez sur à
proximité d’une source c.c. de sécurité appropriées dès que vous vous trouvez à proximité
d’une source c.c.

®

1Liebert

eXM

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Important Safety Instructions

!

!

!

WARNING

Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or
death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight is up to 956 lb. (434kg).

Locate center of gravity symbols and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.

Slots at the base of the module cabinets are intended for forklift use. Base slots will support
the unit only if the forks are completely beneath the unit.

Read all of the following instructions before attempting to move, lift, or remove packaging
from unit, or prepare unit for installation.

AVERTISSEMENT

Le centre de gravité élevé de l’appareil présente un risque de renversement. Une mauvaise
manutention peut entraîner des dommages matériels, des blessures et même la mort.

Faites preuve d’une extrême prudence lors de la manutention des armoires ASC afin d’éviter
de les endommager ou de blesser le personnel. Le module ASC pèse jusqu’à 434kg (956lb).

Identifiez les symboles de centre de gravité et déterminez le poids de l’appareil avant de
manipuler chaque armoire. Testez le levage et l’équilibre des armoires avant de transporter
l’appareil. Maintenez en tout temps l'inclinaison verticale minimale.

Les fentes situées à la base des armoires du module sont conçues pour utiliser le chariot
élévateur. Les fentes situées à la base peuvent soutenir le système seulement si les fourches
se trouvent complètement sous le système.

Lisez toutes les instructions ci-dessous avant de tenter de déplacer, lever, déballer ou
préparer le système en vue de son installation.

WARNING

Risk of electrical shock and fire. Can cause equipment damage, personal injury or death.
Under typical operation and with all UPS doors closed, only normal safety precautions are

necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.

Only test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with an AC and DC voltmeter to ensure safety before making
contact or using tools. Even when the power is turned Off, dangerously high potential electric
charges may exist at the capacitor banks and at the DC connections.

All wiring must be installed by a properly trained and qualified electrician. All power and
control wiring must comply with all applicable national, state and local codes.

One person should never work alone, even if all power is disconnected from the equipment. A
second person should be standing by to assist and to summon help in case of an accident.

Liebert® eXM

™

2

!

AVERTISSEMENT

!

!

Risque de décharge électrique et d’incendie. pouvant entraîner des dommages matériels, des
blessures et même la mort.
Les précautions de sécurité habituelles suffisent lorsque le système ASC est en mode de
fonctionnement normal et que toutes les portes sont fermées. La zone entourant le système
ASC doit être exempte de flaques d’eau, d’humidité excessive et de débris.

Seuls des équipements d’essai conçus pour le dépannage doivent être utilisés. Cette mise en
garde couvre notamment les oscilloscopes. Utilisez toujours un voltmètre c.a. et c.c. pour
vérifier les tensions avant d’établir un contact ou d’utiliser des appareils. Des tensions
dangereusement élevées peuvent demeurer dans les batteries de condensateurs et au niveau
des raccords c.c., même une fois l’alimentation coupée.

Tous les raccords doivent être effectués par un électricien dûment formé et qualifié. Tous les
câbles d’alimentation et de commande doivent être conformes aux codes nationaux et locaux
en vigueur.

Une personne ne devrait jamais travailler seule, même si toute l’alimentation d’entrée est
coupée. Une deuxième personne devrait toujours être présente pour porter assistance ou
chercher de l’aide en cas d’accident.

Ground Leakage Currents

WARNING

Risk of electric shock from high leakage current. Can cause injury, property damage and
death.

EARTH CONNECTION IS ESSENTIAL BEFORE CONNECTING THE INPUT SUPPLY.
Earth leakage current exceeds 3.5 mA and is less than 1000 mA.
Transient and steady-state earth leakage currents, which may occur when starting the

equipment, should be taken into account when selecting instantaneous RCCB or RCD devices.
Residual Current Circuit Breakers (RCCBs) must be selected sensitive to DC unidirectional

pulses (Class A) and insensitive to transient current pulses.
Note also that the earth leakage currents of the load will be carried by this RCCB or RCD.
This equipment must be earthed in accordance with the local electrical code of practice.

Important Safety Instructions

AVERTISSEMENT

Risque de décharge électrique due à un courant de fuite élevé pouvant causer des blessures,
des dommages matériels et même la mort.

IL EST PRIMORDIAL D'ASSURER UNE CONNEXION DE TERRE AVANT DE
BRANCHER L'ALIMENTATION D'ENTRÉE. La fuite à la terre est supérieure à 3,5 mA et
inférieure à 1 000 mA.

Vous devez tenir compte des fuites de courant transitoires et permanentes à la terre,
susceptibles de se produire au démarrage de l'équipement, lors de la sélection des dispositifs
DDFT instantanés.

Vous devez sélectionner des disjoncteurs différentiels de fuite à la terre (DDFT) sensibles aux
impulsions unidirectionnelles c.c. (classe A) et insensibles aux impulsions de courant
transitoires.

Notez également que les courants de fuite à la terre de la charge seront acheminés par ce
dispositif DDFT.

Cet équipement doit être mis à la terre conformément au code national de l'électricité.

®

3Liebert

eXM

™

Important Safety Instructions

!

!

WARNING

Risk of electric shock. Can cause injury, property damage and death.
Under typical operation and with all UPS doors closed, only normal safety precautions are

necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.

Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system. Observe all safety precautions in this manual before
handling or installing the UPS system as well as during all maintenance procedures.

This equipment contains several circuits that are energized with high voltage. Only
test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with AC and DC voltmeters to ensure safety before making
contact or using tools. Even when the power is turned Off, dangerously high electric charges
may exist within the UPS.

All power and control wiring should be installed by a qualified electrician. All power
and control wiring must comply with the NEC and applicable local codes.

ONLY qualified service personnel should perform maintenance on the UPS system.
When performing maintenance with any part of the equipment under power, service
personnel and test equipment should be standing on rubber mats. The service personnel
should wear insulating shoes for isolation from direct contact with the floor (earth ground).

Never work alone, even if all power is removed from the equipment. A second person should
be standing by to assist and summon help in case an accident should occur.

AVERTISSEMENT

Risque de décharge électrique pouvant causer des blessures, des dommages matériels et
même la mort.

Les précautions de sécurité habituelles suffisent lorsque le système ASC est en mode de
fonctionnement normal et que toutes les portes sont fermées. La zone entourant le système
ASC doit être exempte de flaques d’eau, d’humidité excessive et de débris.

Des précautions de sécurité spéciales sont requises pour les procédures associées à la
manutention, à l’installation et à l’entretien du système ASC. Observez toutes les précautions
de sécurité décrites dans le présent manuel avant de manipuler ou d’installer le système ASC,
ainsi que pendant toutes les procédures d’entretien.

Cet équipement comporte plusieurs circuits à haute tension. Seuls des équipements d’essai
conçus pour le dépannage doivent être utilisés. Cette mise en garde couvre notamment les
oscilloscopes. Utilisez toujours des voltmètres c.a. et c.c. pour vérifier les tensions avant
d’établir un contact ou d’utiliser des outils. Des tensions dangereusement élevées peuvent
demeurer dans le système ASC même une fois l’alimentation coupée.

Tous les câbles d’alimentation et de contrôle doivent être installés par un électricien qualifié.
Tous les câbles d’alimentation et de contrôle doivent être conformes au Code national de
l’électricité des États-Unis (NEC) et celui du Canada, ainsi qu’aux codes locaux en vigueur.

L’entretien du système ASC ne doit être confié qu’à des professionnels qualifiés.
Les responsables de l’entretien et l’équipement d’essai doivent reposer sur des tapis de

caoutchouc lors de toute intervention sur une pièce d’équipement sous tension. Les
responsables de l’entretien doivent porter des chaussures isolantes pour prévenir tout contact
direct avec le plancher.

Ne travaillez jamais seul, même si toute l’alimentation d’entrée est coupée de l’équipement.
Une seconde personne devrait toujours être présente pour porter assistance ou chercher de
l’aide en cas d’accident.

Liebert® eXM

™

4

Important Safety Instructions

!

!

WARNING

Failure to follow adequate grounding procedures can result in electric shock hazard to
personnel, or the risk of fire, should a ground fault occur.

All operations described in this section must be performed by properly trained and qualified
electricians or technical personnel. If any difficulties are encountered, contact Emerson
Network Power. See the back page of this manual for contact information.

AVERTISSEMENT

Le non-respect des procédures de mise à la terre peut entraîner des risques d’électrocution du
personnel, ou des risques d’incendie en cas de défectuosité de la mise à la terre.

Toutes les opérations décrites dans cette section ne doivent être effectuées que par des
électriciens ou des techniciens professionnels dûment formés et qualifiés . En cas de
difficultés, communiquez avec Emerson Network Power. Pour obtenir les renseignements de
contact, consultez la dernière page de ce manuel.

NOTICE

Risk of improper ground connection. Can cause equipment damage.
Ground connection is essential before connecting the input supply. This equipment must be

grounded in accordance with local electrical codes. Maximum load must not exceed that
shown on the UPS rating label.

NOTICE

Risk of improper electromagnetic shielding. Can cause radio communication interference.
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J

of the FCC rules. These limits provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with this instruction manual, may cause harmful
interference to radio communications. This unit is not designed for use in a residential area.
Operation of this unit in a residential area may cause harmful interference that the user is
solely responsible for correcting.

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5Liebert

eXM

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GLOSSARY OF SYMBOLS

!

PbH2SO4

-

+

R

Glossary of Symbols

Risk of electrical shock

Indicates caution followed by important instructions

AC input

AC output

i

Requests the user to consult the manual

Indicates the unit contains a valve-regulated lead acid battery

Recycle

DC voltage

AC voltage

Equipment grounding conductor

Bonded to ground

Liebert® eXM

™

6

1.0 INTRODUCTION

The Liebert eXM UPS is a fixed-capacity, transformer-free, online uninterruptible power system with
208/120V input and 208/120V output capability. The Liebert eXM can operate with either a 50 or
60Hz input and provide a matching output frequency conversion.

Introduction

Optional transformers are available to add 208V isolation or 480V or 600V input capability to the
Liebert eXM in the optional Liebert BDC

™ (

Bypass Distribution Cabinet) and in the optional Liebert

eXM Dual Transformer Cabinet.
The Liebert eXM provides continuous, high-quality AC power to business-critical equipment, such as

telecommunications and data processing equipment. The Liebert eXM supplies power free of the
disturbances and variations in voltage and frequency common to utility power, which is subject to
brownouts, blackouts, surges and sags.

The Liebert eXM utilizes the latest in high-frequency, double-conversion pulse width modulation
(PWM) technology and fully digital controls to enhance its reliability and increase the ease of use.

The 60-100kVA/kW Liebert eXM requires external batteries to support the load when utility power is
not present. For ancillary cabinets, refer to 2.6 - Auxiliary Cabinets.

®

7Liebert

eXM

™

2.0 INSTALLATION

This section describes the Liebert eXM’s environmental requirements and mechanical considerations
that must be taken into account when planning the positioning and cabling of the UPS equipment.

Because each site is unique, this section presents a guide to general procedures and practices that
should be observed by the installing engineer, rather than step-by-step installation instructions.

NOTICE

Risk of improper installation. Can cause equipment damage.
Do not apply electrical power to the UPS equipment before the commissioning engineer

arrives at the installation site.
The UPS must be installed by a properly trained and qualified engineer in accordance with

the information contained in this chapter. All the equipment not referred to in this manual is
shipped with details of its own mechanical and electrical installation information.

NOTE

Three-phase, four-wire input power is required.

NOTE

Input power must be supplied to the Liebert eXM from a properly grounded Wye or Delta
source. The Liebert eXM is not for use with impedance grounded systems, corner-grounded
systems or high-leg Delta systems. For these applications, an isolation transformer must be
installed between the input power and the Liebert eXM.

Installation

2.1 Initial Inspections

1. While the Liebert eXM and ancillary cabinets are still on the truck, inspect the equipment and
shipping container for any signs of damage or mishandling. Do not attempt to install the system if
damage is apparent. If any damage is noted, file a damage claim with the shipping agency
immediately and contact Liebert Services at 1-800-LIEBERT to inform them of the damage claim
and the condition of the equipment.

2. Compare the contents of the shipment with the bill of lading. Report any missing items to the
carrier and your local Emerson representative immediately.

3. Check the product label on the back of front door and confirm the contents match the UPS model,
capacity and main parameters that were ordered.

2.1.1 Storing for Delayed Installation

If the equipment will not be installed immediately, it must be stored indoors where the humidity is no
higher than 90% and the temperature is no higher than 104°F (40°C). The storage area must protect
the Liebert eXM from excessive moisture (see 8.2 - UPS Environmental).

2.2 Preliminary Checks

2.2.1 Identification

The equipment supplied has an identification tag on the back of the main door listing the type and
size of the UPS.

Liebert® eXM

™

8

2.3 UPS Location

!

!

2.3.1 Positioning the UPS

Choose a location for the UPS that offers:

• Easy connection to inputs, outputs and auxiliary equipment

• Enough space to service the UPS

• Air circulation sufficient to expel heat produced by UPS

• Protection against moisture and excessive humidity

• Protection against dust and other particulate matter

• Compliance with fire prevention regulations and practices

• Operating environment temperature of 74-80°F (23-27°C) for maximum battery life

2.3.2 Environmental Considerations

Before installing the Liebert eXM, verify that the UPS room satisfies the environmental conditions
stipulated in 8.2 - UPS Environmental, paying particular attention to the ambient temperature
and air exchange system.

The UPS unit should be installed in a cool, dry, clean-air environment with adequate ventilation to
keep the ambient temperature within the specified operating range 32°F to 104°F (0°C to 40°C).

For optimal UPS system performance and service life, maintain the operating temperature within the
range of 74-80°F, (23-27°C).

The Liebert eXM is cooled by internal fans. Cooling air enters the unit through the front of the unit
and is exhausted out the top. To permit proper air flow and prevent overheating, do NOT block or
cover the ventilation openings or blow air down onto the unit. The UPS requires 24 in. (610mm)
ventilation clearance above the unit.

See Table 27 for details on heat dissipation.

Installation

2.4 Considerations in Moving the Liebert eXM

Ensure that the UPS weight is within the designated surface weight loading (lb./ft2 or kg/cm2) of any
handling equipment. See Table 22 for weights of various units.

The Liebert eXM may be rolled on its casters for short distances only. For longer distances, move the
UPS with a forklift or similar equipment to ease the relocation and to reduce vibration.

WARNING

Risk of moving heavy unit. Can cause property damage, injury and death.
Ensure that any equipment that will be used to move the Liebert eXM has sufficient lifting

capacity. The Liebert eXM’s weight ranges from 809 to 956 lb. (367 to 434kg). See Table 22
for details.

The UPS presents a tipping hazard. Do not tilt the Liebert eXM more than 15 degrees from
vertical.

The UPS is fitted with casters—Take care to prevent movement when unbolting the
equipment from its shipping pallet. Ensure adequate personnel and lifting equipment are
available when taking the Liebert eXM off its shipping pallet.

WARNING

Risk of heavy unit tipping over while being moved. Can cause property damage, injury and
death.

The casters are strong enough for movement across even surfaces only. Casters may fail if
they are subjected to shock loading, such as being dropped or rolled over holes in the floor or
obstructions. Such failure may cause the unit to tip over, injuring personnel and damaging
the equipment.

Final Positioning

When the equipment has been finally positioned, ensure that the adjustable stops are set so that the
UPS will remain stationary and stable (see 4.0 - Installation Drawings).

The Liebert eXM and its auxiliary cabinets must be installed on a concrete or equivalent, non­resilient floor.

®

9Liebert

eXM

™

2.5 Mechanical Considerations

!

Refer to Table 1 for Dimensions X, Y and Z
in 60-kVA Liebert eXM models.

The Liebert eXM is constructed with a steel frame and removable panels. Top and side panels are
secured to the chassis by screws. The doors may be opened for access to power connection bars,
auxiliary terminal blocks and power switches.

The UPS comes with an Operator Control Panel that provides basic operational status and alarm
information. The cabinet houses the power components. Cooling is provided by internal fans. The unit
sits on four casters. Adjustable stops are provided to prevent the UPS from moving once it has been
moved to its final position.

WARNING

Risk of heavy units tipping over while being moved. Can cause property damage, injury and
death.

Emerson recommends lifting the units by installing four eyebolts in the factory-fabricated
holes, one at each corner of the unit, attaching cables or similar strapping to the eyebolts and
lifting with a suitable mechanism.

2.5.1 Dimensions

Figure 1 UPS dimensions, center of gravity

39.5" (1000mm)

Installation

31.5"

(600mm)

Without Side Panels

Vent Screen

Front and Back

Display

Front

31.8

(808mm)

LEFT SIDE

Front

(2000mm)

1.56"

(40mm)

78.7"

Dim. Y

See Pg. 2

See Pg. 2

Center

of Gravity

Dim. X

Overall

FRONT

Table 1 Center of gravity and weights for Liebert eXM 60-100kVA frame

Center of Gravity

Dimension X

KVA Rating

60 11.81 (300) 33.66 (855) 22.04 (560) 807 (366) 877 (398)

80 11.81 (300) 31.49 (800) 22.04 (560) 881 (400) 951 (431)

100 11.81 (300) 29.53 (750) 22.04 (560) 955 (433) 1025 (465)

in. (mm)

Dimension Y

in. (mm)

Dimension Z

in. (mm) Unit Shipping

Weight, lb (kg)

See Pg. 2

RIGHT SIDE

Center

of Gravity

Dim. Z

Liebert® eXM

™

10

2.5.2 Clearances

Top P o w er
Cable Entry

Bottom Power
Cable Entry

Top Co nt ro l
Cable Entry

Bottom Control
Cable Entry

Provide at least the minimum clearance required by NEC on all sides of Liebert eXM, including 36"
(914mm) in front, to permit routine tightening of power terminations within the UPS and free
passage of personnel with the door fully opened. Depending on the floor anchoring system used, up to
5" (127mm) may be required in the rear of the UPS.

There are no ventilation grilles on the sides or back of the UPS.
Leave a minimum of 24 in. (610mm) between the top of the UPS frame and the ceiling to permit

adequate air circulation above the unit. Emerson recommends against using air conditioning or other
systems that blow air onto the top of the unit.

2.5.3 Floor Installation

If the Liebert eXM is to be placed on a raised floor, the UPS should be mounted on a pedestal that will
support the equipment point loading. Refer to the bottom view in Figure 1 to design this pedestal.

2.5.4 Cable Entry

Cables can enter the Liebert eXM from the top or bottom through removable metal plates.
Some plates have factory-punched holes and others are designed to allow the personnel to punch

holes for fitting and securing the conduit. Once the conduit holes are punched, these plates should be
reattached to the UPS. The conduit size and wiring method must be in accordance with all local,
regional and national codes and regulations, including NEC ANSI/NFPA 70.

Installation

The UPS must be accessible from the front to allow personnel to complete the cable connections and
make necessary adjustments.

NOTE

When installing the UPS, the customer must provide a disconnect with overcurrent protection
at the output of the UPS.

Figure 2 Cable entry locations

TOP

20.6"

(523mm)

1.5"

(38mm)

4"

(102mm)

1.6"

(41mm)

15.6"

(396mm)

20.4"

(518mm)

BOTTOM

1.6"

(41mm)

28.3"

(519mm)

Casters

34.3"

(872mm)

11 Liebert® eXM

™

2.6 Auxiliary Cabinets

The 60-100kVA frame consists of a single cabinet housing the UPS components. It does not
accommodate internal batteries. The UPS requires external battery cabinets for extended run time.

Battery Cabinets—Optional Liebert Battery Cabinets
provide extended run times, large battery system solutions and optional integrated Alber
monitoring. The battery cabinets are designed to be bolted to the left side of the UPS (see Figure 3).
Refer to SL-25651, the Liebert eXM Battery Cabinet manual, for details.

Maintenance Bypass Cabinets—Optional Liebert eXM Bypass Cabinets
a full or partial wraparound maintenance bypass for servicing the UPS. Liebert Bypass Cabinets are
designed to be bolted to the right side of the UPS (see Figure 3). Refer to SL-25652, the Liebert eXM
Maintenance Bypass Cabinet manual for further details.

Bypass Distribution Cabinets—Optional Liebert eXM Bypass Distribution Cabinets
available to provide a full wraparound maintenance bypass for servicing the UPS with optional input
transformer and output distribution. Liebert bypass cabinets are designed to be bolted to the right
side of the UPS (see Figure 3). Refer to SL-25653, the Liebert eXM Bypass Distribution Cabinet
manual, for further details.

Paralleling Cabinets—Optional Liebert eXM Paralleling Cabinets
connections enabling parallel operation of up to three Liebert eXM UPS in applications offering
increased capacity and redundant protection (1+1, 2+0, 2+1). A partial wraparound maintenance
bypass for servicing of the parallel UPS system is included. Refer to SL-25654, the Liebert eXM
Paralleling Cabinet manual, for further details.

Dual Transformer Cabinets—Optional Liebert eXM Dual Transformer Cabinets
provide step-down voltage transformation for dual input UPS applications. Refer to SL-25655, the
Liebert eXM Dual Transformer Cabinet manual, for further details.

Installation

™

are available for each Liebert eXM model to

™

are available to provide

™

are available to provide

®

battery

™

are

™

are available to

System Composition

A UPS system can comprise a number of optional equipment cabinets, depending on the system
design requirements—e.g., UPS cabinet, External Battery Cabinet and External Bypass Cabinet. All
cabinets used will be the same height and will be designed to be positioned side-by-side to form an
aesthetically appealing equipment suite.

Liebert® eXM

™

12

Figure 3 Cabinet arrangement

Liebert

eXM

Bypass

Distribution

Cabinet

or

Maintenance

Bypass
Cabinet

Bypass

Distribution

Cabinet

or

Maintenance

Bypass
Cabinet

Liebert

eXM

Battery
Cabinet

Battery

Cabinet

Liebert

eXM

Battery

Cabinet

Liebert eXM connected only

to Liebert BDC/MBC

(The Liebert BDC/MBC must be on right

side of the Liebert eXM)

Liebert eXM connected to Liebert BDC/MBC and Battery Cabinets

(BDC/MBC must be on right side of the Liebert eXM)

(Battery Cabinets must be on the left side of the Liebert eXM)

ALL UNITS VIEWED FROM ABOVE

Liebert eXM connected to Battery Cabinet

(Battery Cabinets must be on the left side

of the Liebert eXM)

Layouts shown are typical.

Not all auxiliary cabinets are

shown. Refer to the submittal

drawings for the exact

configuration of your system.

Ready Switch

DIP Switches

Run LED

Fault LED

Battery Start Button

Installation

2.7 Liebert Power Module Assembly

Figure 4 Liebert power module assembly indicators and controls

The BATTERY START button allows starting the UPS on battery; refer to 7.3 - UPS Battery Start.
The Run LED is illuminated Green when the Liebert power module assembly is operating normally.

13 Liebert® eXM

™

The Fault LED will illuminate red when the Liebert power module assembly has a problem.

Liebert IntelliSlot
Bays 1, 2, 3

Ready Switch

DB9

DB9

DB15

See Figures 14- 17 for details.

Table 2 LED indications

LED Status Indication

Run LED (Green)

Flashing Green The inverter is starting, but has no output yet.

Constant Green The inverter has started to supply power.

OFF The inverter has not started up.

Fault LED (Red)

Auxiliary power failure (15V or 24V), rectifier overtemperature, rectifier failure (including battery
SCR short circuit), battery converter failure, soft start failure, main circuit back feed, abnormal

Constant Red

Flashing Red

OFF No above failures or alarms.

input current, inverter failure, output short circuit, bypass SCR short circuit fault, inverter relay
short circuit fault, abnormal bus voltage, module not ready, module ID out of range and
duplicated module ID.

Charger failure, abnormal main circuit voltage, abnormal main circuit frequency, main circuit
undervoltage, main circuit reverse phase, battery unavailable, reverse battery, input zero-loss,
current sharing failure, module overload, inverter relay disconnection fault, bypass SCR
disconnection fault and input fuse blown.

2.8 Static Bypass Assembly

Figure 5 Static Bypass Assembly connections

Installation

The Static Bypass Assembly has three Liebert IntelliSlot interface card bays and connections for
optional ancillary cabinets and for other options.

Liebert® eXM

™

14

3.0 ELECTRICAL CONNECTIONS—UPS

!

!

The UPS requires both power and control cabling once it has been mechanically installed. All control
cables must run separate from power cables in metal conduits or metal ducts that are electrically
bonded to the metalwork of the cabinets to which they are connected.

WARNING

Risk of electric shock. Can cause property damage, injury and death.
Before connecting input power to the Liebert eXM, ensure that you are aware of the location

and operation of the overcurrent protection devices that connect the UPS input/bypass supply
to the power distribution panel.

De-energize and lockout or tagout all incoming high- and low-voltage power circuits before
installing cables or making any electrical connections.

AVERTISSEMENT

Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures et
même la mort.

Avant de procéder au branchement de l'alimentation d'entrée du système eXM de Liebert,
veillez à prendre connaissance de l'emplacement et du fonctionnement des dispositifs de
protection de surintensité qui raccordent l'alimentation d'entrée ou de dérivation du système
ASC au panneau de distribution électrique.

Coupez l'alimentation et appliquez le verrouillage ou l'étiquetage à tous les circuits
d'alimentation haute tension et basse tension avant d'installer les câbles ou d'effectuer tout
autre branchement électrique.

Electrical Connections—UPS

3.1 Power Cabling

3.1.1 Lug Size and Cable Rating

The main factors affecting the choice and size of cable are voltage, current (also taking into account
overcurrent), room temperature and conditions of installation of the cable. Refer to ANSI/NFPA 70.

The power cables of the system must be sized with respect to the following description:

• UPS input cables - The UPS input cables must be sized for the maximum input current,
including the maximum battery recharge current, given in Table 23, with respect to the unit
rating and the input AC voltage.

• UPS bypass and output cables - The bypass and output cables must be sized for the nominal
output current, given in Table 23, with respect to the unit rating and the output AC voltage.

• Battery cables - See the Liebert eXM External Battery Cabinet manual, SL-25651, for battery
installation guidelines and instructions. The manual ships with the battery cabinet and is
available at Liebert’s Web site: www.liebert.com

NOTE
Table 23 gives nominal currents for determining the size of UPS power cables. Other

important factors to consider include cable route length and coordination with protective
devices.

The power cables can be sized to suit the UPS unit rating according to Table 23.

15 Liebert® eXM

™

Torque Requirements

Refer to Tables 3 and 4 for lug size and torque requirements.

Table 3 Busbars—Power wiring

Bolt Shaft Size Lb-in (Nm)

1/2" (M12) 428 (48)

Table 4 Terminal block with compression lugs—Control wiring

AWG Wire Size

or Range Lb-in (Nm)

#22 - #14

3.5 to 5.3

(0.4 to 0.6)

3.2 External Protective Devices

For safety concerns, it is necessary to install external circuit breakers or other protective devices for
the input AC supply of the UPS system. This section provides generic practical information for
qualified installation engineers. The installation engineers should be knowledgeable about regulatory
wiring standards and the equipment to be installed.

To reduce the risk of fire, connect only to a circuit provided with branch circuit overcurrent protection
in accordance with NEC ANSI/NFPA 70.

Electrical Connections—UPS

3.2.1 Rectifier and Bypass Input Supply of the UPS

Overcurrents

Install suitable protective devices in the distribution unit of the incoming mains supply, considering
the power cable current-carrying capacity and overload capacity of the system. Generally, the
magnetic circuit breaker with IEC60947-2 tripping curve C (normal) at the 125% of the nominal
current listed in Table 23 is recommended.

Split bypass: In case a split bypass is used, separate protective devices should be installed for the
rectifier input and bypass input in the incoming mains distribution panel. A shunt trip coil of 120V
must be installed in the bypass input breaker if the system does not include a Liebert Bypass
Cabinet.

NOTE

The rectifier input and bypass input must use the same neutral line.

Earth Leakage, RCD Devices

Any residual current detector (RCD) installed upstream of the UPS input supply:

• Must be sensitive to DC unidirectional pulses (Class A)

• Must be insensitive to transient current pulses, and

• Must have an average sensitivity, adjustable between 0.3 and 1A.

To avoid false alarms, earth leakage monitoring devices when used in systems with split bypass input
or when used in paralleled UPS configurations, must be located upstream of the common neutral
sinking point. Alternatively, the device must monitor the combined four-wire rectifier and split
bypass input currents.

3.2.2 UPS Output

If an external distribution panel is used for load distribution, the selection of protective devices must
provide discrimination with those that are used at the input to the UPS (see Table 28).

Liebert® eXM

™

16

Electrical Connections—UPS

NOTES

1. Install in accordance with national and local electrical codes.

2. Input and bypass must share the same single source.

3. A neutral is required from the system AC input source. A full
capacity neutral conductor is recommended. Grounding
conductors are recommended.

4. Bypass and rectifier inputs and output cables must be run
in separate conduits.

5. Control wiring must be run in separate conduits.

6. Customer must supply shunt trip breakers with 120V coils
to the bypass.

Field-Supplied Wiring

* External overcurrent protection
by others

* Bypass
AC Input

4-Wire + GND

See Note 6

AC Output

208V

4-Wire + GND

* Rectifier

AC Input

4-Wire + GND

Static Bypass

UPS Cabinet

Battery

Output
Busbar

3.2.3 UPS Input Configuration

By default, the Liebert eXM ships with internal links installed between the bypass input and main
(rectifier) input (single input configuration).

Figures 6 and 7 show the Liebert eXM in a split bypass (single source dual-input) configuration. In
this configuration, the static bypass and the maintenance bypass lines are supplied by the same
source using separate feeds. Both feeds must be protected externally with properly sized protective
devices.

To wire the Liebert eXM as a single source dual-input UPS, remove the links and wire the bypass feed
to the bypass busbars, then wire the main feed to the main busbars (see Figure 9).

Figure 6 Single UPS block diagram—Dual input, single source configuration, without bypass cabinet

17 Liebert® eXM

™

Figure 7 Single UPS block diagram—Dual input, single source configuration

NOTES

1. Install in accordance with national and local electrical codes.

2. Input and bypass must share the same single source.

3. A neutral is required from the system AC input source. A full
capacity neutral conductor is recommended. Grounding
conductors are recommended.

4. Bypass and rectifier inputs and output cables must be run
in separate conduits.

5. Control wiring must be run in separate conduits.

6. Optional 54-pole 400A distribution panel or two 225A subfeed breakers.

7. Customer must supply shunt trip breaker with 120V coil. If an optional
Liebert BDC is not present, the shunt trip must be installed to Bypass Breaker.

BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection
by others

Field-Supplied Wiring

Bypass Distribution Cabinet

* Bypass
AC Input

4-Wire + GND

AC Output

208V

4-Wire + GND

* Rectifier

AC Input

4-Wire + GND

BIB

MBB

MIB

Static Bypass

UPS Cabinet

Battery

Optional
Distribution
See Note 6

Electrical Connections—UPS

Liebert® eXM

™

18

3.2.4 UPS Input Configuration with Transformers

Figure 8 shows the Liebert eXM in a split bypass (single-source, dual-input) configuration using two
transformers inside a dual-transformer cabinet.

In this configuration, the static bypass and the rectifier lines can be supplied by independent sources.
The Liebert eXM Dual Transformer Cabinet is the only approved method for supplying the eXM from
two independent sources. See SL-25655 for details. Both feeds must be protected externally with
properly sized protective devices.

Figure 8 Liebert eXM in a split bypass configuration

Dual Transformer
Cabinet, Optional

Bypass Distribution Cabinet

Electrical Connections—UPS

* Bypass
AC Input

3-Wire + GND

* Rectifier

AC Input

3-Wire + GND

The bypass distribution cabinet is available with a 480V, 600V or 208V optional internal transformer.

BIB

UPS Cabinet

Battery

Static Bypass

MBB

MIB

Optional

Distribution

AC Output

208V

4-Wire + GND

19 Liebert® eXM

™

3.2.5 Cabling Guidelines

The following are guidelines only and are superseded by local regulations and codes of practice where
applicable. Use wiring rated at 75°C or greater.

1. Take special care when determining the size of the neutral cable, as current circulating on the
neutral cable may be greater than nominal current in the case of non-linear loads. Refer to the
values in 8.3 - UPS Electrical Characteristics.

2. The ground conductor should be sized according to such factors as the fault rating, cable lengths
and type of protection. The ground cable connecting the UPS to the main ground system must
follow the most direct route possible. Control wiring and power wiring must be run in separate
conduit. Output and input cables must be run in separate conduit.

3. Consider using paralleled smaller cables for heavy currents—this can ease installation.

4. Refer to SL-25651 for guidelines and instructions when sizing battery cables.

5. In most installations, the load equipment is connected to a distribution network of individually
protected busbars fed by the UPS output, rather than connected directly to the UPS itself. When
this is the case, the UPS output cables can be rated to suit the individual distribution network
demands rather than being fully load-rated.

NOTE

If more load is added to the distribution panel, the unit’s cabling must be resized.

6. When laying power cables, do not form coils; this will help avoid increasing formation of
electromagnetic interference.

Electrical Connections—UPS

3.2.6 Cable Connections

The rectifier input, bypass, output and battery are easily accessible from the front of the unit for
installation. All require lug type terminations. They are connected to busbars on the front of the
Liebert eXM, as shown in Figure 9. These busbars are accessible when the I/O panel is removed.

NOTICE

Risk of improper installation. Can cause equipment damage.
When wiring a single-input only system, connect only the power wiring to the input busbars.

Liebert® eXM

™

20

Figure 9 Input busbars—Liebert eXM 60-100kVA frame

Rectifier Input A

Bypass Input A

Bypass Input B

Bypass Input C

Output Neutral

Output A

Output B

Output C

Ground

Rectifier Input B

Rectifier Input C

Batt - N

Batt +

Batt -

Input Neutral

78.56"

(1994mm)

23.6" (600mm)

See
Detail A

FRONT VIEW

Door Removed

DETAIL A

NOTES

1. Control wiring and power wiring must be run in separate conduits.

3. Shown with seismic mounting bracket.

4. All wiring must be in accordance with national and local electrical codes.

Electrical Connections—UPS

21 Liebert® eXM

™

3.2.7 Accessory Fuses and Back-Feed Breaker Wiring

BDSUi
Fuse Block
(optional)

Back-Feed
Breaker
Fuse Block

Two fuse blocks provide power for the back-feed breakers (standard) and the BDSUi (optional). The
fuse blocks are at the lower right of the I/O panel on the front of the Liebert eXM UPS. See Figure 10
for fuse-holder locations.

The back-feed breaker fuse block provides 120V nominal provided from the UPS output (L-N) and the
fuse is rated for 8 amps. Figure 11 shows the back-feed breaker wiring, located on the bypass static
switch assembly.

The Liebert eXM does not include internal back-feed protection. A shunt trip coil of 120V must be
installed in the bypass input breaker if the system does not include a Liebert Bypass Cabinet. This is
a safety feature and will prevent the UPS inverter from back-feeding the bypass source.

The BDSUi fuse block provides 208V nominal from the UPS output (L-L) and the fuse is rated at 8A.
The BDSUi power wiring is shown in SL-25651, the Liebert eXM Battery Cabinet manual.

Figure 10 Accessory fuses

Electrical Connections—UPS

Liebert® eXM

™

22

Electrical Connections—UPS

1. Auxiliary contacts not needed for backfeed breaker operation.

2. A 120V shunt trip coil is required for proper operation.

Dual Input Control Wiring

Upstream Bypass

Input Breaker

Upstream System

Input Breaker

Single Input Control Wiring

Backfeed Breaker
Fuse Block (FH1)

Backfeed Breaker
Fuse Block (FH1)

Upstream Rectifier

Input Breaker

UAM04030
Rev. 3

MX

MX

AUX

AUX

1

C2

C2

C1

C1

1

3

3

N

PH B

13

N

PH B

MX

AUX

1

C2

C1

3

J24

J24

J23

J23

Figure 11 Dual input back-feed breaker wiring when bypass distribution cabinet not used

INV_O

INV_S

INV_C

MAIN_O

MAIN_S

MAIN_C

RESV_O

RESV_S

RESV_C

24

6

J23

24

6

J24

24

6

J25

1

BFP_O

3

BFP_S

5

BFP_C

1

MFP_O

3

MFP_S

5

MFP_C

1

RESV_O

3

RESV_S

5

RESV_C

NOTE

Shunt trips are required in upstream breakers to allow back-feed protection to function
properly.

Shunt trip of the upstream rectifier input breaker is optional.

23 Liebert® eXM

™

3.2.8 Safety Ground

!

!

See
Detail A

Neutral

Ground

2.5" (64mm)
2 Places

2.5" (64mm)

1.75" (44mm)

FRONT VIEW

Door Removed

DETAIL A

23.6" (600mm)

1.75" (44mm)

The safety ground busbar is below the neutral input and output busbars as shown in Figure 12
below. The safety ground cable must be connected to the ground busbar and bonded to each cabinet in
the system. This ground busbar is then connected to the ground electrode conductor (GEC).

All cabinets and cable conduit should be grounded in accordance with local regulations.

WARNING

Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Failure to follow proper grounding procedures can result in electric shock hazard to personnel

or the risk of fire, should a ground fault occur.

AVERTISSEMENT

Le non-respect des procédures de mise à la terre peut entraîner des risques d’électrocution du
personnel, ou des risques d’incendie en cas de défectuosité de la mise à la terre.

Toutes les opérations décrites dans cette section ne doivent être effectuées que par des
électriciens ou des techniciens professionnels dûment formés et qualifiés. En cas de
difficultés, communiquez avec Emerson Network Power. Pour obtenir les renseignements de
contact, consultez la dernière page de ce manuel.

NOTE

Proper grounding significantly reduces problems caused by electromagnetic interference.

NOTE

The ground and neutral busbars are easily accessible when the I/O panel is removed. Cable
connections should be made before a cabinet is attached to the right side of the Liebert eXM or
before the UPS is placed where another obstruction, such as a wall, is against the Liebert
eXM’s the right side.

Figure 12 Ground and neutral busbar connections—60-100kVA frame busbars

Electrical Connections—UPS

Liebert® eXM

™

24

3.2.9 Protective Devices

!

!

For safety, it is necessary to install circuit breakers in the input AC supply external to the UPS
system. Given that every installation has its own characteristics, this section provides guidelines for
qualified installation engineers with knowledge of operating practices, regulatory standards and the
equipment to be installed.

UPS Rectifier and Bypass Input Supply

Protection from excessive overcurrents and short circuits in power supply input

External overcurrent protection for the AC output circuit is to be provided. See 8.3 - UPS
Electrical Characteristics and Table 28 for recommended breaker ratings.

Overcurrent protection for the battery circuit must be provided by the customer when using an
optional External Battery Cabinet.

• Dual Input Single Source

When wiring the UPS with dual inputs but with a single input source, the Rectifier input and the
Bypass input must be protected separately. Size the breakers according to the input currents
shown in Tables 23 and 24.

NOTE

For single or dual input, a 120V shunt trip coil(s) is required when a breaker is supplied by the
customer. See Figures 7 and 8 for details.

System Output

When using an external distribution panel for load distribution, the output neutral and input neutral
must be separated at the input to the UPS.

Electrical Connections—UPS

3.2.10 Cabling Procedure

WARNING

All operations described in this section must be performed by properly trained and qualified
electricians or technical personnel. If any difficulties are encountered, contact Emerson
Network Power. See the back page of this manual for contact information.

AVERTISSEMENT

Toutes les opérations décrites dans cette section ne doivent être effectuées que par des
électriciens ou des techniciens professionnels dûment formés et qualifiés . En cas de
difficultés, communiquez avec Emerson Network Power. Pour obtenir les renseignements de
contact, consultez la dernière page de ce manuel.

NOTE

Hydraulic pressure pliers, combinative tools and piston ring pliers should be used to connect
AC wiring.

Once the equipment has been positioned and secured for operation, and the battery and ground lugs
have been connected (see 3.2.6 - Cable Connections), connect the power cables as described below.
(Study the reference drawing in 4.0 - Installation Drawings.)

1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or
tagged out before installing cables or making any electrical connections.

2. Remove the front I/O panel to gain easier access to the connections busbars.

3. Connect the facility ground and ancillary ground bus cables to the copper ground busbar located
in the middle of the Liebert eXM behind the output connections. All cabinets in the UPS system
must be connected to the user’s ground connection.

NOTE

The grounding and neutral bonding arrangement must comply with the National Electrical
Code and all applicable local codes.

4. Identify and make power connections with incoming cables according to Steps 5 through 8.

25 Liebert® eXM

™

Electrical Connections—UPS

!

!

Common Input Connections

5. For common bypass and main inputs, connect the AC input supply cables to the UPS input
terminals (A2-B2-C2-N1) and tighten the connections to 428 lb-in. (48Nm) (M12 bolt). Ensure
correct phase rotation.

NOTE

For common bypass and main inputs, the AC input cables must be connected to the bypass
terminal (A2-B2-C2-N1) but not the main input terminal (A2-B2-C2).

Split Bypass Connections

6. If a split bypass configuration is used, connect the AC input supply cables to the rectifier input
terminals (A1-B1-C1-N1) and the AC bypass supply cables to the bypass input terminals
(A2-B2-C2-N1) and tighten the connections to 428 lb-in. (48Nm) (M12 bolt). Ensure correct phase
rotation.

NOTE

For split bypass operation, ensure that the busbars between bypass and rectifier inputs are
removed. The neutral line of the bypass input must be connected to that of the rectifier input.

Output System Connections—Ensure Correct Phase Rotation

7. Connect the system output cables between the UPS output busbars (A-B-C-N terminals) and the
critical load and tighten the connections to 428 lb-in. (48Nm) (M12 bolt).

WARNING

Risk of electrical shock. Can cause equipment damage, personal injury and death.
The following procedure provides power to the critical load distribution system. Verify that

the critical load distribution is ready to accept power. Make sure that personnel and
equipment are ready for the critical load distribution system to be energized.

AVERTISSEMENT

Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures et
même la mort.

La procédure suivante fournit de l'énergie au système de distribution de la charge critique.
Vérifiez que ce système est prêt à être alimenté. Assurez-vous que le personnel et les
équipements sont préparés pour la mise sous tension du système de distribution de la charge
critique.

Observe the battery cable polarity. Be sure that the battery connections, if any, are made
with the correct polarity.

8. Refit all protective covers removed for cable installation.

3.3 Control Cables Details

3.3.1 Static Bypass Assembly Features

Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery
system (external battery circuit breaker, battery temperature sensor), communicate with a personal
computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO).
Terminations for these functions are located at the front of the static bypass assembly. The main
features are:

• Input and output dry contacts signal (one pair of contacts of relay)

• Emergency Power Off control (EPO)

• Environmental parameter input interface

• User communication (for data setting and user background monitor)

• Liebert IntelliSlot

• Temperature detect interface

™

interface

Liebert® eXM

™

26

Figure 13 Static bypass assembly connections to display cabinet and options

Operator Control Panel

Battery Cabinet

Bypass Distribution Cabinet

Temp Sensor (optional) and

BCB Control Board

Ground Fault (optional)

Sensor & BCB Control Board

On Generator (optional )

Static

Bypass

Assembly

Mains Backfeed Protection

Bypass Backfeed Protection

Monitor

J22

J26

J23

J24

J22

J22

246

BFP_O

J23

J25

J24

135

246

135

246

BFP_S

BFP_C

135

IN

V_O

IN

V_S

IN

V_C

M

AIN_O

M

AIN_S

M

AIN_C

MFP_O

MFP_S

MFP_C

R

ESV_O

R

ESV_S

R

ESV_C

RESV_O

RESV_S

RESV_C

135791113151719212325272931

2468

10 121416 18 20

22 242628

30 32

J26

Q1 STA

TUS

GND_D

RY

Q2 STA

TUS

GND_D

RY

Q3 STA

TUS

GND_D

RY

Q5 STA

TUS

GND_D

RY

GND_D

RY

RESV2

RESV3

GND_D

RY

UT1 48

5+

GND_M

ON

UT1 48

5-

GEN MODE

+12V_DR

Y

GND_DR

Y

GND_DR

Y

TMPBATT IN

_

RESERVED

ENV_DET

GND_DR

Y

CHG SHUT

GND_DR

Y

RESV1

UT2 485+

UT2 485-

GND_DR

Y

J22

135791113151719

2 4 6 8 10 12 14 16 18 202 4 6 8 10 12 14 16 18 20

135791113151719

12V_DRV

BCB_ON

GND_DRY

12V_A

GND_DRY

TMP_BATT

BCB STATUS

GND_DR

Y

BATT_GND_FAULT

PCAN H

PCAN H

1

PMON CAN

H

PMON C

AN H1

PSER B

US

H

PSER B

US H1

LBS PORT PARALLEL PORT

J20

J19

RS232

LCD

J30

J2

J1

4321

EPO-NO

+12V

+12V

EPO-NC

J21

NC

NC

NC

NC

Figure 14 Auxiliary terminal block detail (static switch assembly front panel)

Electrical Connections—UPS

27 Liebert® eXM

™

3.4 Dry Contacts

J26

2468

10 12

14

16 18 20

22 24

26

28

30 32

GEN MODE

+12V_DR

Y

GND_DR

Y

GND_DR

Y

TMP BATT IN

_

RESERVED

ENV_DET

GND_DR

Y

CHG SHUT

GND_DR

Y

RESV1

UT2 485+

UT2 485-

GND_DR

Y

NC

NC

135791113151719212325272931

Q1 STATUS

GND_DRY

Q2 STATUS

GND_DRY

Q3 STATUS

GND_DRY

Q5 STATUS

GND_DRY

GND_DRY

RESV2

RESV3

GND_DRY

UT1 485+

GND_MON

UT1 485-

NC

The UPS provides input dry contacts and output dry contacts on the Auxiliary Terminal Block (ATB).

3.4.1 Input Dry Contacts

External input dry contacts are connected via the ATB. Dry contacts are available for environment
detection, battery ground fault detection, etc.

The UPS accepts external signal from zero-voltage (dry) contacts connected through external dry
contact terminals produced, and these terminals are on the static bypass assembly. Through software
programming, these signals become active when these contacts connect to +12V to ground (in the
most left side). The cables connected to the monitor board must be separated from power cables.
Moreover, these cables should be double-insulated with a typical cross-section of 0.5 to 1mm
maximum connection length between 82 and 165ft. (25-50m). The ATB has several input dry contacts.

Figure 15 Input dry contacts

Electrical Connections—UPS

2

for a

Liebert® eXM

™

28

Table 5 Input dry contacts—J26

Port Pin

J26 1 Q1 STATUS The main input switch status signal

Name Description

3 GND_DRY Dry ground

5 Q2 STATUS The bypass input switch status signal

7 GND_DRY Dry ground

9 Q3 STATUS External maintenance switch status signal

11 GND_DRY Dry ground

13 Q5 STATUS External output switch status signal

15 GND_DRY Dry ground

17 GND_DRY Dry ground

19 RESV2 Reserved

21 RESV3 Reserved

23 GND_DRY Dry ground

25 NC NC

27 UT1 485+ 485+

29 UT1 485- 485-

31 GND_MON Monitor ground

2 GEN MODE Generator mode input. Generator mode when not connected

4 GND_DRY Dry ground

6 TMP BATT_IN Internal Battery Temperature Detect

8 +12V_DRY Power

10 Reserved Reserved

12 GND_DRY Dry ground

14 ENV_DET Battery room temperature detect

16 GND_DRY Common ground

18 CHG SHUT Charger off contact

20 GND_DRY Dry ground

22 RESV1 Reserved

24 GND_DRY Dry ground

26 NC NC

28 UT2 485+ 485+

30 UT2 485- 485-

Electrical Connections—UPS

29 Liebert® eXM

™

3.4.2 Output Dry Contacts

The Auxiliary Terminal Block has three output dry contact relays (see Figure 16 and Table 6).

Figure 16 Output dry contacts and EPO wiring

Electrical Connections—UPS

INV_O

INV_S

INV_C

MAIN_O

MAIN_S

MAIN_C

RESV_O

RESV_S

RESV_C

24

6

24

6

24

6

J23

J24

J25

1

BFP_O

3

BFP_S

5

BFP_C

1

MFP_O

3

MFP_S

5

MFP_C

1

RESV_O

3

RESV_S

5

RESV_C

Table 6 Output dry contact relays

Port Pin

J24

J23

J23

J24

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 80 and 200 feet (25-60m), respectively.

Name Description

1 MFP_O Rectifier back-feed normally open contact. Open when there is no back-feed.

3 MFP_S Rectifier back-feed common contact.

5 MFP_C Rectifier back-feed normally closed contact. Closed when there is no back-feed.

2 INV_O Inverter state normally open contact. Open when the inverter is abnormal.

4 INV_S Inverter state common contact.

6 INV_C Inverter state normally open contact. Closed when the inverter is normal.

1 BFP_O Bypass back-feed normally open contact. Open when there is no back-feed.

3 BFP_S Bypass back-feed common contact.

5 BFP_C Bypass back-feed normally closed contact. Closed when there is no back-feed.

2 MAIN_O Rectifier input state normally open contact. Open when the rectifier is abnormal.

4 MAIN_S Rectifier input state common contact.

6 MAIN_C Rectifier input state normally closed contact. Closed when the rectifier is normal.

Liebert® eXM

™

30

3.4.3 Liebert BDC Interface

The Liebert BDC interface is on the Auxiliary Terminal Block at J26. Refer to Figure 15 for circuit
details.

Table 7 Liebert BDC interface

Position Name

J26.1 Q1 STA The main input switch status signal

J26.5 Q2 STA The bypass input switch status signal

J26.9 Q3 STA External maintenance switch status signal

J26, 3, 7, 9 GND Dry ground

These contacts cannot be active unless they are set via software.

Description

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 80 and 200 feet (25-60m), respectively.

NOTE

Refer to SL-25653, the Liebert eXM Bypass Distribution Cabinet manual for the Liebert BDC
wiring.

3.4.4 Battery Cabinet Interface Connectors

The battery cabinet interface is on the Auxiliary Terminal Block at J22. Refer to Figure 17 for circuit
details.

Figure 17 Battery cabinet interface—J22

Electrical Connections—UPS

12V_DRV

BCB STATUS

GND_DRY

2 4 6 8 10 12 14 16 19 20

NC

BCB_ON

GND_DRY

111133155177199

Table 8 Battery cabinet interface—J22

Pin Name Description

1 12V_DRV BCB driver signal
3 BCB STATUS BCB state signal
5 GND_DRY Dry ground
7 BCB_ON BCB on line signal

9NC NC
11 GND_DRY Dry ground
13 TMP_BATT External Battery temperature
15 12V_A Power
17 GND_DRY Dry ground
19 BATT_GND_FAULT Battery ground fault signal

TMP_BATT

Y

12V_A

GND_DR

BATT_GND_FAULT

J22

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 80 and 200 feet (25-60m), respectively.

31 Liebert® eXM

™

3.4.5 EPO Input—Optional

EPO-NO

12V

J2

12V

EPO-NC

3214

NOTICE

Risk of exceeding internal voltage limits. Can cause equipment damage.
Do not apply more than 12V to the Emergency Power Off (EPO) input. Exceeding 12V on this

input can damage the Liebert eXM’s internal circuitry and control boards. Exceeding 12V will
also put the Liebert eXM in an EPO state, and the unit will not reset, making it non­functional.

The UPS has an Emergency Power Off (EPO) function operated by a button on the control panel or by
a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.

The J2 connector, shown in Figure 18, is the remote EPO input interface. The EPO has NO/NC
contacts that become active when shorting terminals J2: 3 and 4 or open terminal connection J2:2
and 1.

If an external Emergency Stop capability is required, it is connected at terminals J2: 1 and 2 and at
J2: 3 and 4 on the monitor board. It also is connected to the Normally Open or Normally Closed
remote stop switch between these two terminals using shielded cable (see Figure 18 and Table 9). If
this function is not used, terminals J2:3 and 4 must be opened and J2:1 and 2 must be closed.

Figure 18 EPO wiring and signal names for J2

Electrical Connections—UPS

Table 9 EPO input contact relays—J2

Pin

Name Description

1 EPO-NC EPO activated when opened to Pin 2

2 + 12V EPO activated when opened to Pin 1

3 + 12V EPO activated when shorted to Pin 4

4 EPO-NO EPO activated when shorted to Pin 3

NOTE

The Emergency Stop action within the UPS shuts down the rectifier, inverter and static
bypass. It does not internally disconnect the input power supply. To disconnect ALL power to
the UPS, open the upstream feeder breaker(s) after the remote EPO is activated.

NOTE

Normally Closed EPO – J2: 12, these terminals are supplied factory-linked on the Bypass
Module on the UPS and must remain installed if using NO contacts.

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 80 and 200 feet (25-60m), respectively.

Liebert® eXM

™

32

Figure 19 Single UPS Remote Emergency Power Off

Remote Emergency
Power Off
(Customer-Supplied)

Field-Supplied Wiring

Electrical Connections—UPS

Single Liebert eXM Module

Liebert eXM

Bypass Module

EPO_NO

4

+12V

3
2

+12V

EPO_NC

1

X9_J2

33 Liebert® eXM

™

4.0 INSTALLATION DRAWINGS

The diagrams in this section illustrate the key mechanical and electrical characteristics of the Liebert
eXM UPS System cabinets (UPS, Liebert BDC and battery).

Figure 20 UPS dimensions—Front view

23.6" (600mm)

78.7"

(2000mm)

Installation Drawings

NOTES

1. Dimensions are in inches (mm)

2. 24" (610mm) minimum clearance above unit and
12" (305mm) rear clearance required for air exhaust.
36" (914mm) front access required for service

3. Keep cabinet within 15 degrees of vertical.

4. Top and bottom cable entry available through removable
access plates. Remove, punch to suit conduit size and replace.

5. Unit bottom is structurally adequate for forklift handling.

6. Control wiring and power wiring must be run in separate conduits.

7. Copper cables only are recommended.

8. All wiring is to be in accordance with national and local
electrical codes.

9. All battery cabinets must be positioned on the left side
of the UPS.

10. Battery cabinets offered at 600mm and 880mm widths.

FRONT VIEW

Liebert® eXM

™

34

Figure 21 UPS main components—Typical 60-100kVA unit

Installation Drawings

Input mN
Input mC
Input mB
Input mA

Input bA
Input bB
Input bC

FRONT

Door Open

Batt-N

Batt +

Batt -

Output oN

Ground

Output oC

Output oB

Output oA

Bypass
Module

Power
Modules

Replaceable
Air Filter

Operator
Control Filter

Replaceable
Air Filter

RIGHT SIDE

Door Open Side Panel Removed

35 Liebert® eXM

™

Figure 22 UPS cable connections—60-100kVA frames

Output Neutral

Batt - N

Batt +

Input Neutral

Batt -

Ground

Installation Drawings

2.5" (64mm)
4 Places, typical

3.1" (79mm)

Rectifier Input A

Bypass Input A

Rectifier Input B

Rectifier Input C

DETAIL A

23.6" (600mm)

Bypass Input B

Bypass Input C

Output A

Output B

Output C

See
Detail A

1.9" (48mm)
6 Places, typical

1.8"

(46mm)

3.4" (86mm)

1.8"

(46mm)

DETAIL B

Busbar Dimensions

37.5" (953mm)

78.56"

(1994mm)

FRONT VIEW

Door Removed

Liebert® eXM

™

63.6"

(1615mm)

RIGHT SIDE VIEW

Panel Removed

36

5.0 OPTION INSTALLATION

5.1 Liebert IntelliSlot™ Communication

The Liebert eXM has three Liebert IntelliSlot ports to allow field-installation of optional
communication cards. Liebert IntelliSlot cards communicate via Liebert’s proprietary Velocity
protocol to cards that translate the information into such protocols as SNMP and Modbus. Other
cards provide dry contact signals for external signaling of operating status.

The Liebert IntelliSlot communication ports may be installed or removed while the Liebert eXM is
operating.

5.2 Liebert IntelliSlot Web Card—SNMP/HTTP Network Interface Card

This network interface card provides all real-time data and status information as SNMPv1 traps for
connection to a 10/100-baseT Ethernet connection. The same card also will transmit the same status
information and all measured parameters for display via a Web browser. The Liebert IntelliSlot bays
are on the right side of the control module and labeled as IntelliSlot1, IntelliSlot2 and IntelliSlot3.

Table 10 Liebert eXM communication options

Port Type and

Location

Left Liebert

IntelliSlot

Center Liebert

IntelliSlot

Right Liebert

IntelliSlot

Labeled ID

Name of Port

IntelliSlot 1

IntelliSlot 2

IntelliSlot 3

Monitoring

Devices Supported

IS-Relay

IS-Unity-DP

IS-Unity-LIFE

IS-485EXI

IS-Relay

IS-Unity-DP

IS-Unity-LIFE

IS-485EXI

IS-Relay

IS-Unity-DP

IS-Unity-LIFE

IS-485EXI

Option Installation

37 Liebert® eXM

™

5.2.1 Liebert IntelliSlot™ Unity Cards—IS-UNITY-LIFE, IS-UNITY-S, IS-UNITY-DP

• IS-UNITY-LIFE: This standard card is used for communication between the Liebert eXM and
Emerson’s Trellis

• IS-UNITY-DP: This card can be used instead of the standard card if communication to two
third-party platforms is required. Third-party platforms include SNMP and 485 (Modbus/Bacnet)
protocols. This card would still be used for communication between the Liebert eXM and
Emerson’s Trellis NMS and LIFE Services. All communication protocols are active
simultaneously.

• Liebert IntelliSlot Dry Contact Card (IS-RELAY): Provides dry contact alarm information,
including: On Battery, On Bypass, Low Battery, Summary Alarm, UPS Fault and On UPS signals
for communication to a remote monitoring system or for use with Liebert MultiLink

• IS-485EXI: The Liebert IntelliSlot 485 EXI Card provides connection to a Liebert SiteLink-E
allowing Liebert SiteScan

®

NMS and LIFE™ services.

®

Web 4.0 monitoring and control of your Liebert equipment.

5.3 Liebert IntelliSlot Web Card—Optional

An optional Web card is available that provides remote access to the UPS. A wide variety of status
and summary information is available through an Ethernet connection.

Figure 23 Liebert IntelliSlot Web card display

Option Installation

®

software.

™

Liebert® eXM

™

38

5.4 Liebert IntelliSlot™ Relay Card

18

101

9

TB1

green

TB2

black

The Liebert IntelliSlot Relay card (IS-RELAY) provides voltage-free contact closures for remote
monitoring of alarm conditions.

Delivering On Battery, On Bypass, Low Battery, Summary Alarm, UPS Fault and On UPS
signals, the easy-to-install card integrates with AS/400 computers (additional cable required) and
other relay contact monitoring systems.

The relay card is rated for 24 VAC/DC at 1A. and supported in any of the three Liebert IntelliSlot
bays on the Liebert eXM.

5.4.1 Liebert IntelliSlot Relay Card Pin Configuration

The card has two terminals blocks, TB1 (green, numbered 1-9) and TB2 (black, 10-18), as shown in
Figure 24.

Figure 24 Pin location and numbering

Option Installation

Refer to your Liebert product user manual for the pin configuration for the terminal blocks.

Table 11 Relay card pin configuration

Pin Function Operation

1 Common - Low Battery —

2 Low Battery Closed if Low Battery point occurs.

3 Low Battery Closed if battery is OK

4 Common - UPS Fault —

5 UPS Fault Closed if UPS fault occurs

6 UPS Fault Closed if no UPS failure

7 Common - On Battery —

8 On Battery Closed if On Battery power (Utility failure)

9 On Battery Closed if not On Battery power (Utility OK)

10 Not Used —

11 Not Used —

12 Not Used —

13 Summary Alarm* Closed if no alarm conditions are present

14 Summary Alarm* Closed if Summary Alarm occurs

15 Common - Summary Alarm* —

16 On UPS Closed if On UPS (inverter) power

17 On Bypass Closed if On Bypass

18 Common - On Bypass —

39 Liebert® eXM

™

5.4.2 Liebert IntelliSlot™ Relay Card Jumper Setup

Jumper
P6

Jumper
P5

Jumper
P4

Jumper
P3

Jumper
P7

Front

of

Card

The Liebert IntelliSlot Relay Card has five jumpers, P3 through P7, as shown in Figure 25. Each
jumper connects two pins.

Figure 25 Jumper location and numbering

Option Installation

By default all five jumpers have shunts installed. The two pins are shunted together to provide the
functions shown in Table 12, allowing relay commons to be tied together.

The jumpers should be removed if there is any external voltage source that may intentionally or
inadvertently be connected to the relay.

Removing the shunt from any two pins breaks the connection between the relay commons so they are
not tied together.

Table 12 Jumper connections

Jumper Relay

P6 On Battery

P5 UPS Fault

P4 Low Battery

P3 On Bypass

P7 Summary Alarm

NOTE

Refer to the Liebert IntelliSlot Relay Card manual, SL-23211 for additional details. the
document is available at the Liebert Web site, www.liebert.com

Liebert® eXM

™

40

6.0 OPERATOR CONTROL AND DISPLAY PANEL

STATUS

F1 F2 F3 F4 HELP

EPO

INVERTER ON

INVERTER OFF

SILENCE ON/OFF

FAULT CLEAR

EMERGENCY

LCD and Menu Buttons

Control
Buttons

Mimic
Current
Path

1

2

3

54

6

7

8

6.1 Operator Control Panel

The control panel and LCD on the front of the Liebert eXM lets the operator:

• Turn the UPS On or Off.

• Transfer into the various operating modes.

• Silence alarms.

• Check the status of the UPS and its external batteries, including all measured parameters, events
and alarms.

The main areas of the control panel are shown below in Figure 26 and explained in Table 13.

• Mimic Display - view the status of the Liebert eXM in single-line diagram format—indicators
show status by changing color when ON, flashing or OFF

• Liquid Crystal Display (LCD) and Navigation keys - view status and operational data from
the Liebert eXM in tabular format

• Control buttons - turn the Liebert eXM On or Off, silence alarms

Figure 26 Overview of control panel

Operator Control and Display Panel

Table 13 Descriptions of UPS operator control and display panel

Mimic Current Path Control Buttons

Item # Function Button Function

1 Rectifier indicator (AC to DC) EPO EPO switch

2 Battery indicator (backup DC power) INVERTER ON Inverter start button

3 Bypass input indicator INVERTER OFF Inverter shutdown button

4 Inverter indicator (DC to AC) FAULT CLEAR Fault reset button

5 Load indicator (AC output) SILENCE ON/OFF Alarm mute button

6 UPS status and alarm indicator Menu Buttons

7 Audible alarm (buzzer) Button Function

8 Protective cover for EPO button F1 through F4 and HELP LCD menu keys

NOTE

Help button menus are not active. Future units will ship with an F5 legend in place of the
HELP legend.

41 Liebert® eXM

™

6.2 Mimic Display Indicators

Reflector
Indicator

Bypass
Indicator

Battery
Indicator

Status
Indicator

Load
Indicator

Inverter
Indicator

Figure 27 Mimic display indicators location

Operator Control and Display Panel

Mimic indicators show the operational status of the Liebert eXM by their color—green, amber or
red—and whether they are ON (solid), flashing or OFF. Table 14 provides a guide to interpreting the
various states of the indicators.

Table 14 Mimic display status indicators

Indicator

(see Figure 27) Green Flashing Green / Amber Red Off

1. Rectifier Load on Rectifier

2. Battery

3. Bypass

4. Inverter

Battery Powering
the Load

Load on Bypass
Power

Inverter Powering
the Load Normally

Flashing Green: Utility normal,
but rectifier not operating

Flashing Green: Battery
pre-warning (low battery)

—

Flashing Green: Inverter on
standby

Rectifier fault

Battery or battery
converter abnormal*

Bypass out of
normal range

Inverter fault Inverter normal but Off

5. Load UPS output On — UPS output overloaded UPS has no output power

6. Status

* Battery or battery converter abnormal events include these event messages (see Table 38 in Appendix B - UPS Status Messages): No

Battery, Battery Replaced, Battery Reverse, Batt. Conv. Over. Curr., Batt. Converter Fault, Batt. Converter Overtemp.

No Alarms—UPS
Working Normally

Amber: UPS has a general
alarm

UPS has a serious alarm —

Rectifier is normal, but utility
is abnormal

Battery and converter are
normal, and battery is not
discharging

Bypass Normal

Liebert® eXM

™

42

6.3 Control Buttons

The Control Buttons on the front panel may be used to shut down the UPS completely, turn the
inverter on or off, restart the UPS after a fault and silence the alarm, as shown in Figure 28. The
function of each button is described in Table 15.

NOTE

To activate a button properly, press and hold until you hear a short beep—about two seconds.

Figure 28 Control button layout

Operator Control and Display Panel

STATUS

F1 F2 F3 F4

HELP

LCD Navigation Keys

Table 15 Control buttons

Button

(see Figure 28) Function

Completely shuts down the UPS, including the static switch.

EPO

INVERTER ON

INVERTER OFF

FAULT CLEAR

SILENCE ON/OFF

CAUTION: Use caution before pressing the Emergency Power Off (EPO) button. This
button completely shuts down the unit and the critical load.

Press this button to start the inverter and transfer from static bypass to inverter.
NOTE: If the inverter is not ready, this will not activate the UPS.

Press this button to shut down the inverter during operation. The load will be transferred
to static bypass.

After the UPS shuts down due to a fault and the alarm condition has been resolved, press
this button to clear the fault and restart the UPS.

Press this button once to silence the alarm buzzer when an alarm is active. Any new fault
will sound the buzzer again.
If the alarm buzzer is not beeping, press this button to test the alarm sound.

EPO

EMERGENCY

INVERTER ON

INVERTER OFF

FAULT CLEAR

SILENCE ON/OFF

EPO Button
Cover

EPO Button

Inverter On
Button

Inverter Off
Button

Fault Clear
Button

Silence
On/Off Button

43 Liebert® eXM

™

6.4 Alarm Buzzer

Buzzer

STATUS

F1 F2 F3 F4

HELP

INVERTER ON

INVERTER OFF

SILENCE ON/OFF

FAULT CLEAR

The alarm buzzer produces three types of sounds:

• Single beep - when any Control button is pressed

• Single beep repeating every two seconds - the system has a general alarm

• Continuous - the system has a serious fault

If the alarm buzzer makes no sound, the system may be operating properly or the alarm may have
been silenced manually.

Figure 29 Alarm buzzer location

Operator Control and Display Panel

6.5 LCD Overview

The LCD on the front panel has five main sections, as shown in Figure 30. Press the F1 key below
the LCD to scroll through these sections.

• UPS system information - view UPS name and model, date and time, overall status.

• LCD Menu - choose a category of data items to appear below the menus (see Table 17).

• Data and settings - view data items for the selected menu (see Table 17).

• Current status messages - check the most recent UPS event and alarm messages (see Table 38
in Appendix B - UPS Status Messages).

• Navigation key icons - look at the icon above each navigation key to determine how the key
operates when pressed (see 6.6 - Navigation Keys).

The LCD displays alarm information in real time. After appearing in the current status section of the
LCD, status messages are stored in the history log—512 records can be stored and retrieved.

Liebert® eXM

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44

Figure 30 Sections of the LCD

F1 F2 F3 F4

HELP

Single eXM

02:17:47

L1-N/L2 L2-N/L3 L3-N/L1

L-N voltage (V) 121.4
L-N current (A) 12.2
Frequency (Hz) 59.96
L-L voltage (V) 211.3
Power factor 0.00

122.7

14.2

59.96

211.6

0.00

121.7

13.5

59.96

210.5

0.00

Mains

UPS System Information

Current menu

Current status

Menu icons

Return to Output
Menu

Move to
Next Menu

Time

Alarms

E-Mail
Notification
Icon

ESC

?

Operator Control and Display Panel

6.6 Navigation Keys

The navigation keys on the front panel—F1 through F4 and Help—are used to access the LCD to view
the current status and other information about the Liebert eXM.

Navigation key icons on the LCD appear above each key to indicate its operation (see Table 16). The
keys are “soft keys” that can change functions according to the icon.

•Use F1 to move to the home portion of the LCD.

•Use F3 and F4 as cursor keys to move left and right or up and down, depending on the icons
displayed above the keys.

•Use F3 and F4 on the display simultaneously to view individual Module information such as
Input and Output conditions and individual Module Firmware versions

•Use F2 as an ESC key.

•Use HELP to access help information on the LCD or to enter a choice.

Table 16 Icons for navigation keys

Key F1 F2 F3 F4 HELP

Functions
Available

Home

Exit

Left Right Enter

Up Down Help

45 Liebert® eXM

™

6.7 LCD Menus and Data Items

The LCD menus provide access to the following categories of information and settings for the UPS.
Selecting a menu changes the information displayed in the UPS data items portion of the LCD. The
menu choices are listed below and described in detail in Table 17.

• Mains—View utility power input data: voltage, current, frequency and power factor

• Bypass—View bypass data: voltage and frequency

• Output—View output data: voltage, current, frequency and power factor

• Load—View load data: load percent, output current, output power and crest factor (CF)

• System—View system data

• Battery—View battery characteristics: voltage, current, temperature, remaining time and
capacity - and messages when the battery is boost/float charging or disconnected

• Events—View the events log: displays all recent events added to the log (new records added at
end)

• Records—Access the history log: displays all records in the log (new records added at end)

• Language—Select a language for LCD text (choices appear in the native language)

• Settings—Configure UPS settings: adjust the display contrast, choose a format for date display,
set the date and time, set up the UPS for modem communications (baud rate, address, mode and
phone numbers to dial for alarm notifications) and change the password

• Command—Start or stop a battery maintenance test, battery capacity test or system test

• Run Time—View available backup time for the UPS and bypass

• Version—View firmware versions for the inverter, rectifier and software display board and the
model information for the UPS

Figure 31 shows a menu tree of the options available from the LCD menus.

Operator Control and Display Panel

Liebert® eXM

™

46

Figure 31 Menu tree

Battery

Battery voltage (V)
Battery current (A)
Battery temperature (°C)
Remain Time Min.
Battery capacity (%)
Battery boost charging
Battery float charging
Battery disconnected

Command

Battery maintenance test
Battery capacity test
System test
Stop testing
Freshening Charge
Stop Freshening Charge
Modem Auto-answer enable
Battery Reset

Run Time

UPS Run Time
Byp Run Time

System

Sout (kVA)
Pout (kW)
Qout (kVAR)

Records

(history log)

Language

(Choices for
display)

Mains (input)

L-N voltage (V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor

Load

Sout (kVA)
Pout (kW)
Qout (kVAR)
Load level %
Crest factor

Bypass

L-N voltage (V)
Frequency (Hz)
L-L voltage (V)

Output

L-N voltage (V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor

Settings

Display contrast
Date format set
Date & time
Comm1 baud rate
Comm2 baud rate
Comm3 baud rate
Communication address
Communication mode
Callback times
Phone No.1
Phone No.2
Phone No.3
Command password
Protocol
ECO Mode
Battery Equalize Charge

Events

(events log)

Version

Monitor version
Rectifier version
Inverter version
Bypass version
UPS model

Operator Control and Display Panel

47 Liebert® eXM

™

6.8 Language Selection

F1 F2 F3 F4

HELP

Single e XM

02:17:47

ENGLISH DEUTSCH

POLSKI FRANCAIS ITALIANO

ESPANOL NEDERLANDS SVENSKA

PORTUGUES

Language

The LCD menus and data display are available in 12 languages (Chinese, Dutch, English, French,
German, Italian, Japanese, Polish, Portuguese, Russian, Spanish and Swedish). To select a different
language:

1. From the main menu, press the F4 (shift) key to move the cursor to the Language menu at the
bottom of the screen.

2. Press HELP to access the language choices.

3. Press F3 and F4 (left and right arrows) as needed to highlight the desired language.

4. Use HELP to select the required language.

5. Return to the main menu by repeatedly pressing F2 (ESC) and F1.
All text on the LCD will now be displayed in the selected language.

Figure 32 Language selection screen

Operator Control and Display Panel

6.9 Current Date and Time

To change the system date and time:

Liebert® eXM

1. From the main menu, press the F4 (shift) key to move the cursor to the Settings menu at the
bottom of the screen.

2. Press HELP to select the Settings menu.

3. Use F3 and F4 (up and down) to select the Date & Time option, then press HELP (enter).

4. Use F4 to position the cursor on the row where the date and time are displayed, then press
HELP (enter).

5. Using the F3 (up), enter the current time and date information.

6. Press HELP (enter) to save the settings.

7. Press F2 (ESC), then F1 to return to the main screen.

™

48

Figure 33 Date and time screen

F1 F2 F3 F4

HELP

Single e XM

02:17:47

Display contrast

Date format set Y/M/D

D/M/Y M/D/Y Y/M/D

Date & time

2010-07-15 02:17:45

Settings

F1 F2 F3 F4

HELP

Single e XM

02:17:47

1

Mains volt. abnormal

2010-06-07
2010-06-07

3

Mains volt. abnormal

2010-06-07
2010-06-07

6

Mains volt. abnormal

2010-06-07
2010-06-07

Records

09:48:10
09:48:10

09:48:10
09:48:10

09:48:10
09:48:10

History log
(records menu)

Operator Control and Display Panel

6.10 UPS History Log

The Liebert eXM displays status changes as they occur and stores that data in the history log, as
shown in Figure 34.

• History Log: When a record moves to the history log, the time the status changed is recorded.
The history log can hold up to 512 records. History log records may be viewed by accessing the
Records menu.

Figure 34 History log records

See Table 38 in Appendix B - UPS Status Messages for a complete list of status messages, along
with a description and any recommended actions.

49 Liebert® eXM

™

6.11 Types of LCD Screens

F1 F2 F3 F4

HELP

Single e XM

02:17:47

EMERSON

®

Network Power

Press any key back to main menu

F1 F2 F3 F4

HELP

Single e XM

02:17:47

L1-N/L2 L2-N/L3 L3-N/L1

L-N voltage (V) 118.4
L-N current (A) 0. 0
Frequency (Hz) 59.97
L-L voltage (V) 205.7
Power factor 0.00

119.2

0.0

59.97

208.4

0.00

121.6

13.5

59.97

207.9

0.00

Output

This section provides a quick guide to the main types of LCD screens.

6.11.1 Opening Display

As the UPS begins powering up, the opening display appears, as shown in Figure 35.

Figure 35 Opening display

Operator Control and Display Panel

6.11.2 Default Screen

After the UPS has powered up and completed a self-test, the output screen appears, as shown in
Figure 36. This window is the default screen.

Figure 36 Default screen

Liebert® eXM

™

50

6.11.3 UPS Help Screen

F1 F2 F3 F4

HELP

Single e XM

02:17:47

EMERSON

®

Network Power

Press any key back to main menu

Transfer with Interrupt,

please confirm or cancel

This operation leads t o

output shutdown,
Confirm or cancel

Press the HELP key below the LCD to display the Help window. (Press the HELP key again to exit
the Help window.)

6.11.4 Screen Saver Window

If there has been no interaction with the Liebert eXM’s LCD for 2 minutes, the screen saver window
appears. It remains on the LCD for 2 minutes, then the screen will go dark. The LCD will become
active again when any key is pressed.

Figure 37 Screen saver window

Operator Control and Display Panel

6.12 Pop-Up Windows

Pop-up prompt windows appear when the user must confirm a choice or perform an operation. This
section describes the pop-up windows. Some operations require entering a password; refer to 6.12.9 -
Enter Control Password for help.

6.12.1 From Bypass to Inverter Mode With Power Interruption

If the bypass voltage or frequency exceeds the synchronized range and

6.12.2 From Inverter to Bypass Mode With Interruption

utility voltage or frequency is normal, the inverter cannot be in
synchronization with the bypass, and the output can only transfer to
inverter after an interruption of about 15ms when the user presses the
INVERTER ON button. Before transferring, the system will let the
user confirm whether the interruption can be accepted, as shown at right. If the bypass voltage
returns to normal before the user makes confirmation, the UPS will transfer to inverter mode
automatically. At the same time, the prompt window will close.

If the bypass voltage or frequency exceeds the synchronized range and
the UPS is in inverter mode, the system must let the user confirm and
accept the power interruption danger before pressing the INVERTER
OFF button to shut down the output of the inverter. The user can also
cancel the shutdown operation, as shown at right. If the bypass voltage
returns to normal before the user makes the confirmation, the UPS
will transfer to bypass operation mode automatically, and at the same time the prompt window will
disappear soon.

51 Liebert® eXM

™

6.12.3 System Self-Test

System Self-Test finished.

Please check the current

warn ings

Battery will be depleted,

Confirm or cancel

Battery Self-Test aborted,

Conditions not met

Battery equali ze charge

enabled

Battery equalize charge

disabled

Battery reset

Battery Refresh Charge

aborted,

Conditions not met

Enter Control Password

*****

When a system self-test is completed, a pop-up window reports the
results of the test, as shown at right.

• Press the Help (Enter) key and the pop-up window closes.

6.12.4 Battery Capacity Test Confirmation

When a battery capacity test is started from the Command menu, the
battery will be discharged to low-battery warning level. The Liebert
eXM asks for confirmation before the test is started, as shown at right.

• To confirm the choice and begin the battery capacity test, press the
Help (Enter) key and the pop-up window disappears.

• To cancel the test, press the F2 (ESC) key. The pop-up window disappears.

NOTE

For a battery capacity test to function properly, the load must be between 20% and 100%.

6.12.5 Battery Self-Test Aborted, Condition Not Met

When a battery capacity test is started from the Command menu and
the battery self-test condition is inadequate, the Liebert eXM will not
perform a battery test. User should check whether the battery state is
boost charging and whether the load level is greater than 20 percent.

Operator Control and Display Panel

• Press the Help (Enter) key and the pop-up window closes.

6.12.6 Battery Equalize Charge

The user can Enable or Disable the Battery Equalize Charge of the
batteries. Use the F3 or F4 button to Enable or Disable the Battery
Equalize feature.

• Press the Help (Enter) key and the pop-up window closes.

6.12.7 Battery Reset

The user can reset the battery statistics to a new battery state. Use the
F3 or F4 button to select Battery Reset

• Press the Help (Enter) key and the pop-up window closes.

6.12.8 Battery Refresh Charge Aborted, Condition Not Met

When a battery refreshening charge is started from the Command
menu and battery refreshening condition fails to meet requirements,
the Liebert eXM will not perform a battery refreshening charge. User
should check if boost charging condition is not enough, such as (No
battery, charger failed, etc.).

• Press the Help (Enter) key and the pop-up window closes.

6.12.9 Enter Control Password

When a UPS control operation requires a password, the pop-up at
right will be displayed. The password is 12345.

Use the Right or Left arrow to move the cursor along the password
field. Then use the Up and Down arrows to advance until the desired
number is displayed. Enter the password one digit at a time.

Liebert® eXM

™

52

Operator Control and Display Panel

Table 17 UPS menus and data window items

Menu Type Item Type Explanation

L-N voltage (V) Phase voltage

Mains
(input)

Bypass

Output

Load

System

Battery

Events (event log) Displays recent events

Records (history log) Displays all records in the history log

Language (choices for text displayed) User may select any of 12 languages for LCD text.

L-N current (A) Phase current

Frequency (Hz) Input frequency

L-L voltage (V) Line-line voltage

Power factor Power factor

L-N voltage (V) Phase voltage

Frequency (Hz) Bypass frequency

L-L voltage (A) Line-line voltage

L-N voltage (V) Phase voltage

L-N current (A) Phase current

Frequency (Hz) Output frequency

L-L voltage (V) Line-line voltage

Power factor Power factor

Sout (kVA) Sout: Apparent power

Pout (kW) Pout: Active power

Qout (kVAR) Qout: Reactive power

Loadlevel % The percent of the UPS rating load

Crest factor Output current Crest Factor

Sout (kVA) Sout: Apparent power

Pout (kW) Pout: Active power

Qout (kVAR) Qout: Reactive power

Single unit

When configured as a single unit, UPS displays only native load, no system
load.

Battery voltage (V) Battery bus voltage

Battery current (A) Battery bus current

Battery temperature (°C) Internal battery temperature °C

Remain Time Min. Battery run time remaining

Battery boost charging Battery is boost charging

Battery float charging Battery is float charging

Battery equalize charging Battery charge is equalized

Battery disconnected Battery is not connected

53 Liebert® eXM

™

Table 17 UPS menus and data window items (continued)

Menu Type Item Type Explanation

Display contrast Adjust the LCD display contrast

Choose the format for date display: YYYY MM DD, DD MM YYYY and MM DD
YYYY

When Liebert IntelliSlot 1 Communication mode is Modem, this parameter sets
the number of times a number is redialed to send an alarm notification.

When Liebert IntelliSlot 1 Communication mode is Modem, this is the first
phone number to be dialed (to send an alarm notification).

When Liebert IntelliSlot 1 Communication mode is Modem, this is the second
phone number to be dialed (to send an alarm notification).

When Liebert IntelliSlot 1 Communication mode is Modem, this is the third
phone number to be dialed (to send an alarm notification).

This test performs a partial discharge of the battery to obtain a rough estimate
of the battery capacity. Load must be between 20% and 80%.

This test performs a full discharge of the battery to obtain a precise measure of
the battery capacity. Load must be between 20% and 80%.

This is a self-test of the UPS. When the user activates this function, a pop-up
window appears about 5 seconds later to show the results.

Manually stops a battery maintenance test, battery capacity test or system
test.

Allows a temporary Equalize charge for the batteries. This charge is
configurable for 1 to 36 hours.

Manually enable the modem's auto-answer function.

Settings

Command
(Start/Stop
Battery &
System
Tests)

Run Time

Version

Date format set

Date & time Set the date and time

Comm1 baud rate Communication baud rate setting for Liebert IntelliSlot 1

Comm2 baud rate Communication baud rate setting for Liebert IntelliSlot 2

Comm3 baud rate Communication baud rate setting for Liebert IntelliSlot 3

Communication address This setting is applicable to RS485 communication mode

Communication mode Communication Mode Setting

Callback times

Phone No.1

Phone No.2

Phone No.3

Command password User can modify the command password.

Protocol System protocol

ECO Mode Configures UPS for ECO mode

Battery Equalize Charge Configures UPS for equalize charge

Battery maintenance test

Battery capacity test

System test

Stop testing

Freshening Charge

Stop Freshening Charge Manually stops a Freshening Charge.

Modem Auto-answer
enabled

Battery Reset Resets battery statistics

UPS Run Time UPS Run Time

Byp Run Time Bypass Run Time

UPS model Provides UPS model information—for example, 208V-60Hz.

Monitor Version Monitor Firmware Version

Rectifier Version Rectifier Firmware Version

Inverter Version Inverter Firmware Version

Bypass Version Bypass Firmware Version

Operator Control and Display Panel

Liebert® eXM

™

54

7.0 OPERATION

!

!

WARNING

Risk of electrical shock. Can cause personal injury or death.
This UPS has several circuits that are energized with high DC as well as AC voltages. Check

for voltage with both AC and DC voltmeters before working within the UPS. Check for voltage
with both AC and DC voltmeters before making contact.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should be involved in installing the UPS or preparing the UPS for
installation. When performing maintenance with any part of the equipment under power,
service personnel and test equipment should be standing on rubber mats.

AVERTISSEMENT

Risque de décharge électrique pouvant causer des blessures graves, voire mortelles.
Ce système ASC comporte plusieurs circuits à haute tension c.a et c.c. Vérifiez les tensions au

moyen de voltmètres c.a. et c.c. avant d’utiliser le système ASC. Vérifiez les tensions avec des
voltmètres c.a. et c.c. avant d’établir tout contact.

Seuls des employés qualifiés et dûment formés portant un casque, des gants, des chaussures
et des lunettes de sécurité adéquats doivent se charger d’installer le système ASC ou de le
préparer pour l’installation.Les responsables de l’entretien et l’équipement d’essai doivent
reposer sur des tapis de caoutchouc lors de toute intervention sur une pièce d’équipement sous
tension.

Operation

The Liebert eXM operates in the modes shown in 7.1 - Liebert eXM Operating Modes. This section
describes various kinds of operating procedures under each operating mode, including transfer
between operating modes, UPS setting and procedures for turning on/off inverter.

As shown in SL-25651, the Liebert eXM Battery Cabinet manual, the AC utility source is supplied
through the input breaker, and the rectifier converts the alternating current into DC power. The
inverter converts the AC power from the utility—or DC power from an optional External Battery
Cabinet—into AC power for the load. The batteries power the load through the inverter in the event
of a power failure. The utility source can also power the load through the static bypass.

If maintenance or repair of the UPS is necessary, the load can be switched without interruption in
service using the optional Liebert BDC.

7.1 Liebert eXM Operating Modes

The UPS is designed to operate as an on-line, double-conversion, reverse-transfer system in the
following modes:

•Normal Mode

•Battery Mode

• Auto-Restart Mode

• ECO Mode

• Bypass Mode

• Battery Start Mode

• Maintenance Mode (Manual Bypass)

•Sleep Mode

• Paralleling Mode

• Output Voltage Adjustment

• Generator Mode

NOTE

1. The user controls and indicators mentioned in these procedures are identified in 6.0 ­Operator Control and Display Panel.

2. The audible alarm may sound at various points during these procedures. It can be canceled
at any time by pressing the SILENCE ON/OFF push button.

55 Liebert® eXM

™

Operation

!

NOTE

This unit refers to some modes and conditions that are set or adjusted using proprietary service
software. To take advantage of all the available features for the Liebert eXM, the unit must be
commissioned by an Emerson-authorized engineer.

Normal Mode

Operating in normal mode, the Liebert eXM’s rectifier derives power from a utility AC source and
supplies regulated DC power to the inverter, which regenerates precise AC power to supply the
connected equipment. The rectifier also uses the utility source power to charge the batteries.

Battery Mode—Requires Optional External Battery Cabinet

When utility AC power fails, the Liebert eXM protects the critical load by instantaneously channeling
battery power from optional External Battery Cabinets to the inverter, which continues supporting
the critical load without interruption. When utility power returns and is within acceptable limits, the
Liebert eXM automatically shifts back to Normal mode, with the rectifier powering the critical load.

Auto-Restart Mode

The battery may become exhausted following an extended AC utility failure. The inverter shuts down
when the battery reaches the End of Discharge voltage (EOD). The UPS may be programmed to “Auto
Recovery after EOD” after a delay time if the AC utility recovers. This mode and any delay time may
be programmed by the commissioning engineer.

Bypass Mode

When the Liebert eXM is in bypass mode, the load is directly supported by utility power and is
without battery backup protection.

The Liebert eXM’s static transfer switch will shift the load from the inverter to bypass mode without
interruption in AC power if the inverter is synchronous with the bypass and any of the following occurs:

• inverter fails

• inverter overload capacity is exceeded

• inverter is manually turned off by user

NOTE

If the inverter is asynchronous with the bypass, the static switch will transfer the load from the
inverter to the bypass WITH interruption in AC power to the critical load. This interruption
will be less than 15ms (in 50Hz), or less than 13.33ms (in 60Hz). This interruption time may be
altered by modifying the Output transfer interrupt time setting.

ECO Mode

When ECO Mode is enabled, the Liebert eXM switches inverter power from the UPS input to the
bypass input to save energy by improving UPS efficiency. In this mode, the bypass is the preferred
source. If the bypass voltage or frequency becomes outside preset limits, the UPS load is transferred
back to the inverter.

Battery Start Mode

The battery start option permits starting the Liebert eXM with power supplied only by the batteries
(at charged condition).

Maintenance Mode

For maintenance or repair, the Liebert eXM may be operated in maintenance mode. To place the
Liebert eXM in maintenance mode, follow the instructions in 7.4 - Switching the UPS from

Normal Operation to Maintenance Bypass.

WARNING

Risk of arc flash and electric shock. Can cause equipment damage, injury and death
The UPS input and output must be protected with external overcurrent protection devices. In

maintenance mode, the input and output busbars remain energized and present an electric
shock hazard.

Liebert® eXM

™

56

Operation

!

!

!

AVERTISSEMENT

Risque d'arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

L'entrée et la sortie du système ASC doivent être protégées par des dispositifs de protection
de surintensité externes. En mode d'entretien, les barres omnibus d'entrée et de sortie
demeurent sous tension et présentent un risque de décharge électrique.

Paralleling Mode

This option is available only on 208V Input Parallel with the optional Liebert eXM Paralleling
Cabinet. It can parallel the following:

• two Liebert eXM’s

• 60-100kW frames in any module capacity

•redundant

• can allow up to 200kW of load capacity

A sharing inductor and optional Liebert eXM Paralleling Cabinet are required for parallel units.

NOTE

To parallel non-208 input voltages, an upstream transformer must drop the input voltage to
208V before the paralleling gear.

Output Voltage Adjustment

This feature allows a Liebert Customer Engineer to adjust the Liebert eXM’s output voltage over a
range of -5% to +5% of nominal. The output voltage adjustment can be used to compensate for any
drop in line voltage that may occur when the UPS is a significant distance from the protected load. In
addition, it can be used to optimize the UPS output voltage for loads that operate more efficiently at a
voltage different from the nominal Liebert eXM output voltage.

Generator Mode

The Liebert eXM UPS can be set up for operation in Generator Mode by an Emerson Network Power
Liebert Services engineer. The setup requires connecting J26 Pin 2 to Pin 4.

7.2 UPS Startup

The Liebert eXM must be fully installed and commissioned before startup, and external power
isolators must be closed. Once those general conditions are met, the UPS may be started.

WARNING

Risk of electrical shock. Can cause equipment damage, personal injury and death.
The following procedure provides power to the critical load distribution system. Verify that

the critical load distribution is ready to accept power. Make sure that personnel and
equipment are ready for the critical load distribution system to be energized.

AVERTISSEMENT

Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures et
même la mort.

La procédure suivante fournit de l'énergie au système de distribution de la charge critique.
Vérifiez que ce système est prêt à être alimenté. Assurez-vous que le personnel et les
équipements sont préparés pour la mise sous tension du système de distribution de la charge
critique.

57 Liebert® eXM

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7.2.1 Startup Procedure

To start the UPS from a fully powered-down condition:

1. Open the external power switch.

2. Open the UPS door.

3. Connect the power supply cables.

4. Ensure the correct phase rotation.

5. Close the external input circuit breaker and connect input power.
The LCD activates. The rectifier indicator flashes while the rectifier is starting. The rectifier

enters normal operation state, and after about 30 seconds, the rectifier indicator stops blinking
and is illuminated in a steady green. After initialization, the bypass static switch turns on. The
mimic LEDs appear as shown Table 18.

Table 18 Mimic indicators after initialization

LED Status

Rectifier Indicator Green

Battery Indicator Red

Bypass Indicator Green

Inverter Indicator Off

Load Indicator Green

Status Indicator Amber

Operation

6. Ensure that the Liebert Power Module assembly ready switches are latched (in Down position).

7. Close the external output circuit breaker.

8. Press the INVERTER ON button for 2 seconds. The inverter indicator flashes while the inverter
is starting. After the inverter is ready, the UPS transfers from bypass to inverter, the bypass
indicator turns Off, and the inverter indicator turns On. The UPS is in Normal Mode. The mimic
LEDs will appear as shown below.

Table 19 Mimic indicators for normal mode operation with battery breaker open

LED Status

Rectifier Indicator Green

Battery Indicator Red

Bypass Indicator Off

Inverter Indicator Green

Load Indicator Green

Status Indicator Amber

9. Close the battery breaker.

Table 20 Mimic indicators for normal mode operation with battery breaker closed

LED Status

Rectifier Indicator Green

Battery Indicator Off

Bypass Indicator Off

Inverter Indicator Green

Load Indicator Green

Status Indicator Green

Liebert® eXM

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58

7.2.2 Startup in ECO Mode

The bypass indicator remains green to indicate that the load is supplied by the bypass input. The
inverter indicator will flash green to indicate that the inverter is on standby in ECO Mode.

1. Verify that input power is available.

2. Select ECO Mode on the Control Panel.

3. Verify that the Bypass indicator remains green to indicate that the load is supplied by the bypass
input.

The UPS is now operating in ECO Mode.

NOTE

In ECO Mode, the load is being powered by the utility as long as the bypass source remains
within set limits.

7.2.3 Switching Between UPS Operation Modes

To switch from Normal Mode to Static Bypass Mode—Press the INVERTER OFF button to
switch to Bypass Mode (see Figure 28).

NOTE

In Static Bypass Mode, the load is being powered by the utility and is not protected from
fluctuations in input power: spikes, sags and failure.

To switch from Normal Mode to ECO Mode—Select ECO Mode using the Liebert eXM control
panel. After a 5-minute qualification of the bypass voltage, the UPS will transfer to bypass.

The Bypass indicator on the MIMIC display will illuminate green to indicate that the UPS is
operating properly with input power form the bypass input. The Inverter indicator will flash green to
indicate that the Inverter is on standby operating in ECO mode.

To switch from ECO mode to Normal Mode—When the UPS is in ECO Mode, press the
INVERTER ON button. After the inverter enters normal operation, the UPS transfers to Normal
Mode.

Operation

7.3 UPS Battery Start

The Battery Start option permits starting the Liebert eXM with power supplied only by the batteries
(at charged condition).

NOTICE

Risk of loss of power to the connected load. Can cause equipment damage.
Before attempting to start the UPS without utility power present, ensure that the batteries

are fully charged—over 2.1V per cell—and will supply adequate run time to the load. Load
requirements may deplete batteries that are not fully charged an may cause an unintended
UPS shutdown.

1. Verify that the battery cabinet is properly connected (see Figure 26) and that the battery breaker
is closed.

2. Press the Battery Start button on the front panel of any Liebert Power Module assembly for
2 seconds.

The LCD displays the start screen, and the battery indicator flashes green. It stops flashing and
becomes solid green about 30 seconds after the rectifiers enter normal operation.

3. Press and hold the INVERTER ON key for two seconds, and the UPS will begin operating in
Battery Mode.

59 Liebert® eXM

™

7.4 Switching the UPS from Normal Operation to Maintenance Bypass

!

!

!

Follow the procedure below to transfer the load from the UPS inverter output to the Maintenance
Bypass system.

NOTICE

Risk of loss of power to the connected load.
Can cause equipment damage.
This procedure must be performed by properly trained and qualified personnel who are

knowledgeable about the operation of this system. Failure to follow these instructions will
result in loss of power and possible damage to critical equipment.

Before performing this operation, read any messages on the LCD to be sure that bypass
supply is regular and the inverter is synchronous with it. If those conditions are not present,
there is a risk of a short interruption in powering the load.

This procedure assumes that UPS is operating normally.

1. Press the INVERTER OFF button on the right side of the Operator Control Panel for longer than
2 seconds.

The Inverter indicator will turn Off, the status indicator will turn amber and an audible alarm
will sound. The load will transfer to static bypass (internal) and the inverter will shut off.

NOTE

Pressing the Alarm Silence Switch cancels the audible alarm, but leaves the warning message
displayed until the appropriate condition is rectified.

2. Open the Liebert BDC door to gain access to the bypass isolation breaker (BIB), maintenance
bypass breaker (MBB) and maintenance isolation breaker (MIB).

3. When the lamp indicator on the BDC is illuminated, press and hold the adjacent push button and
remove the Key from the lock (K0).

4. Insert the Key into the lock on the MBB and turn the Key.

5. Close the MBB.

6. Verify the MBB is closed. Failure to close the MBB will interrupt power to the load.

7. Open the MIB.

8. Remove the key from the lock on the MIB. Insert the key into the lock (K0) and turn the key.

9. The UPS system is now isolated from the critical load.

10. For a single-input system with three-breaker bypass distribution cabinet and panelboard, the
bypass isolation breaker (BIB) remains closed; this allows power to remain present at the UPS
input; refer to Figure 38.

11. For a single-source, dual-input system, the bypass isolation breaker (BIB) can be opened to
further isolate the UPS from input power; refer to Figure 39.

Operation

WARNING

Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Wait 5 minutes for the internal DC busbar capacitors to discharge before attempting

to remove the internal protective barriers.

AVERTISSEMENT

Risque d'arc ou de décharge électrique pouvant entraîner des dommages matériels,
des blessures et même la mort.

Attendez 5 minutes que les condensateurs de barre omnibus c.c. internes se
déchargent avant d'essayer de retirer les barrières de protection internes.

WARNING

Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Even with the UPS in maintenance bypass and Off, portions of the Liebert eXM system are

still energized. Service must be performed by properly trained and qualified personnel only.

Liebert® eXM

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60

Operation

!

Notes:

1. Install in accordance with national and local electrical codes.

2. Input and bypass must share the same single source.

3. UPS system input and output cables must be run in separate conduits.

4. Control wiring must be run in separate conduits.

5. Optional 54 pole 400A distribution panel or two 225A subfeed breakers.

6. Transformer available: 208, 220, 480, 600V input.

BYPASS DISTRIBUTION CABINET

* System

AC Input

3 Wire + GND

(Optional

Distribution)

See Note 5

AC Output 208V

4 Wire + GND

Local Grounding

Electrode

See Note 1

Static Bypass

BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection By Others

Field-Supplied Wiring

BATTERY

UPS

BIB

MBB

MIB

AVERTISSEMENT

Risque d'arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

Même lorsque le système ASC est en mode de dérivation d'entretien et hors tension, des
parties du système eXM de Liebert demeurent sous tension. L'entretien ne doit être confié
qu'à un personnel qualifié et dûment formé.

NOTICE

Risk of power loss to connected load. Can cause damage to equipment.
The load equipment is not protected from normal supply aberrations when the Liebert eXM is

operating in the maintenance bypass mode.

Figure 38 One-line diagram, single-input UPS with 3-breaker bypass distribution cabinet and panelboard

61 Liebert® eXM

™

7.5 Switching the UPS from Maintenance Bypass to Normal Operation

!

!

Follow the procedure below to transfer the load from the Maintenance Bypass system to the UPS
inverter output.

These conditions must be met for this operation to proceed:

• the UPS must be operating normally

• the BIB breaker must be closed

• the UPS system must be in the Maintenance Bypass mode of operation.

WARNING

Risk of electrical shock and arc flash. Can cause property damage, injury and death.
This procedure must be performed by properly trained and qualified personnel who are

knowledgeable about the operation of this system. Failure to follow these instructions will
result in loss of power and possible damage to critical equipment.

Before performing this operation, read any messages on the LCD to be sure that bypass
supply is regular and the inverter is synchronous with it. If those conditions are not present,
there is a risk of a short interruption in powering the load.

AVERTISSEMENT

Risque d'arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

Cette procédure doit être effectuée par un personnel qualifié et dûment formé possédant des
connaissances adéquates du fonctionnement du système. Le non-respect de ces directives peut
entraîner une perte de puissance et des dommages aux équipements critiques.

Avant d'effectuer cette opération, lisez les messages s'affichant à l'écran ACL pour vous
assurer que l'alimentation de dérivation est régulière et que l'onduleur est synchrone avec
celle-ci. Si ces conditions ne sont pas réunies, une courte interruption d'alimentation pourrait
survenir.

Operation

1. Verify that the Liebert eXM is in Maintenance Bypass mode.

NOTE

Pressing the Alarm Silence Switch cancels the audible alarm, but leaves the warning message
displayed until the appropriate condition is rectified.

2. Open the Liebert BDC door to gain access to the bypass isolation breaker (BIB), maintenance
bypass breaker (MBB) and the maintenance isolation breaker (MIB).

3. When the Lamp indicator on the BDC is illuminated, press and hold the adjacent push button and
remove the key from the lock (K0).

4. Insert the key into the lock on the MIB, and turn the key.

5. Close the MIB.

6. Verify the MIB is closed. Failure to close the MIB will interrupt power to the load.

7. Open MBB.

8. Remove the key from the lock on the MBB.

9. Insert the key into the lock (K0) and turn the key.
The UPS system is now supplying power to the critical load.

10. Press the INVERTER ON button on the right side of the Operator Control Panel for longer than
2 seconds.

The Inverter indicator flashes while the inverter is starting.
After the inverter is ready, the UPS transfers from static bypass to inverter, the bypass indicator

turns Off and the inverter indicator turns On. The UPS is in Normal Mode. The indicator will
appear as shown in Table 20.

Liebert® eXM

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62

7.6 De-Energize Liebert eXM with Maintenance Bypass Cabinet

NOTICE

Risk of loss of input power to the critical load. Can cause equipment damage.
This procedure will remove power from the critical bus. Shut down the connected load

properly and verify that no connected equipment requires input power before beginning this
procedure.

To de-energize the system:

1. On the UPS control panel, press and hold the INVERTER OFF button for 2 seconds.

2. Open all battery circuit breakers(s) including the internal battery breaker (if applicable).

3. If the MBC is an Emerson cabinet, open the Maintenance Isolation Circuit Breaker (MIB). If the
MBC is a customer-issued switchgear or a non-Emerson cabinet, open the breaker(s) that supply
power to the critical bus.

4. Open the Rectifier Input Circuit Breaker and Bypass Input Breaker (if dual input). If the MBC is
a customer-issued switchgear or a non-Emerson cabinet, open the breaker(s) that supply power to
the UPS input and bypass input (if dual input).

5. Allow 5 minutes for all DC circuits and capacitors to fully discharge.

6. Open the external feeder breaker to the MBC or bypass switchgear.

7. Install a Lockout/Tagout on the external feeder breaker to the MBC or bypass switchgear.

8. Use a digital multimeter to verify there is no AC or DC voltage present at the UPS input, output
and bypass bus bars.

9. Use a digital multimeter to verify there is no AC or DC voltage present at the MBC BIB, MIB and
MBB breakers.

Operation

63 Liebert® eXM

™

7.7 De-Energize Liebert eXM Without Maintenance Bypass Cabinet

Notes:

1. Install in accordance with national and local electrical codes.

2. Input and bypass must share the same single source.

3. A neutral is required from the system AC input source. Emerson recommends
a full-capacity neutral conductor and grounding conductors.

4. Bypass and rectifier inputs and output cables must be run in separate conduits.

5. Control wiring must be run in separate conduits.

6. Customer must supply shunt trip breakers with 120V coils to the bypass
and rectifier inputs.

* Bypass
AC Input

4 Wire + GND

See Note 6

* Rectifier

AC Input

4 Wire + GND

See Note 6

AC Output

208V

4 Wire + GND

Static Bypass

Field-Supplied Wiring

BATTERY

UPS

* External Overcurrent Protection By Others

NOTICE

Risk of loss of power to the critical load. Can cause equipment damage.
This procedure will remove power from the critical bus. Take precautions by providing a

backup power supply or shutting down equipment before de-energizing the Liebert eXM.

To de-energize the Liebert eXM:

1. On the UPS control panel, press and hold the INVERTER OFF button for 2 seconds.

2. Open all battery circuit breakers(s) including the internal battery breaker (if applicable).

3. Open the UPS output circuit breaker(s).

4. Open the UPS input circuit breaker and bypass circuit breaker (dual input systems only).

5. Allow 5 minutes for all DC circuits and capacitors to fully discharge.

6. Use a digital multimeter to verify there is no AC or DC voltage present at the UPS input, output
and bypass bus bars.

Figure 39 Typical configuration for single UPS

Operation

7.8 Emergency Shutdown With EPO

This circuit has been designed to switch Off the UPS in emergency conditions (e.g., fire, flood, etc.).
The system will turn Off the rectifier, inverter and stop powering the load immediately (including the

Liebert® eXM

inverter and bypass), and the battery stops charging or discharging.
If the input utility is present, the UPS’s controls will remain active; however, the output will be

turned Off. To remove all power from the UPS, the external feeder breaker should be opened. (Refer
to Figure 26).

™

64

Operation

7.9 Auto Restart

When the main and bypass sources fail, the UPS draws power from the battery system to supply the
load until the batteries are depleted. When the UPS reaches its end of discharge (EOD) threshold, it
will shut down.

The UPS will automatically restart and enable output power:

• after utility power is restored

• if “Auto Recovery after EOD Enabling” is enabled in the UPS configuration (set by factory or by
Liebert Services)

• after the “Auto Recovery after EOD Delay Time” expires (the default delay is 10 minutes)
During the auto recovery delay, the Liebert eXM will be charging its batteries to provide a safety

margin for equipment shutdown if input power fails again.

If the “Auto Recovery after EOD Enabling” feature is disabled, the system must be restarted manually.

7.10 Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions

Once all appropriate measures have been taken to correct the problem indicated by the alarm
message appearing on the Operator Control Panel, carry out this procedure to restore the UPS to
regular operation following an EPO action or for the following reasons: Inverter Overtemperature,
Cut-Off Overload, Battery Overvoltage, excessive switching (BYP: XFER COUNT BLOCK), etc.

When the user confirms that the fault is cleared:

1. Press the FAULT CLEAR button to let the system exit the emergency off state.

2. Press the INVERTER ON button on the right side of the Operator Control Panel for longer than
2 seconds (after the rectifier has qualified).

NOTE

The rectifier will start automatically 5 minutes after the of overtemperature fault is cleared.

After the EPO button is pressed, if the input utility is removed, the UPS will shut down completely.
When input utility is restored, the EPO condition will clear, and the UPS will enable the static bypass
and restore the output.

7.11 Battery Protection

7.11.1 Battery Undervoltage Warning

Before the end of discharge, the Liebert eXM displays a low battery warning. After this warning, the
battery has the capacity for 5 minutes discharging with full load (default time). The Liebert eXM can
be user-configured to display this warning from 3 to 60 minutes before end-of-discharge.

7.11.2 Battery End-of-Discharge (EOD) Protection

If the battery voltage is lower than the end-of-discharge voltage, the battery converter will be shut
down.

7.12 OperationStatic Bypass Switch

The circuit block labeled “Static Bypass” contains an electronically controlled switching circuit that
enables the critical load to be connected to either the inverter output or to a bypass power source via
the static bypass line. During normal system operation, the load is connected to the inverter and the
inverter contactor is closed; but in the event of a UPS overload or inverter failure, the load is
automatically transferred to the static bypass line.

To provide a clean (no-break) load transfer between the inverter output and static bypass line, the
static switch activates, connecting the load to bypass. To achieve this, the inverter output and bypass
supply must be fully synchronized during normal operating conditions. This is achieved through the
inverter control electronics, which make the inverter frequency track that of the static bypass supply,
provided that the bypass remains within an acceptable frequency window.

NOTE

When the UPS is operating in static bypass mode or on maintenance bypass, the connected
equipment is not protected from power failures or surges and sags.

65 Liebert® eXM

™

8.0 SPECIFICATIONS AND TECHNICAL DATA

8.1 Conformity and Standards

The Liebert eXM has been designed to conform to the following standards:

Safety UL 1778 4th Edition, CSA 22.2 107.3

Surge IEC 61000-4-5 Criteria B

Harmonics IEC 61000-3-4

Electrical Fast Transient IEC 61000-4-4, Criteria B

ESD IEC 61000-4-2, Criteria B

FCC Part 15, Class A

Radiated Immunity IEC 61000-4-3, Criteria A

Conducted Immunity IEC 61000-4-6, Criteria A

Low-Frequency Signals IEC 61000-2-2 Criteria A

Transportation ISTA Procedure 1H

ISO 9001

Misc OSHA, ASME, NEMA PE-1

The Liebert eXM has UL and c-UL approval.

Specifications and Technical Data

8.2 UPS Environmental

The Liebert eXM is designed to operate under the following environmental conditions without
damage or degradation in electrical operating characteristics:

Table 21 Environmental requirements

Item Requirements

Acoustical Noise, dBA, at 55 in. (1.4m) 59

Operating Altitude

Relative Humidity 95%

Operating Temperature, °F (°C) 104 (40)

UPS Storage/Transport Temperature, °F (°C) -4 to 158 (-20 to 70)

Table 22 UPS mechanical characteristics

Rated Power, kVA

Dimensions, W x D x H, in (mm) 23-5/8 x 39-3/8 x 78-3/4 (600 x 1000 x 2000)

Weight, lb (kg) 955 (433)

Color RAL 7021 (Black)

Protection Degree IEC (60529) IP20

3281 ft. (1000m) 1% maximum kW derate per 328 ft. (100m) rise
between 3281 and 9843 ft. (1000m and 3000m)

60 - 100

Liebert® eXM

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66

Specifications and Technical Data

8.3 UPS Electrical Characteristics

Refer to additional circuit breaker notes in 3.2.7 - Accessory Fuses and Back-Feed Breaker
Wiring.

NOTE

The breakers and cables used must be in accordance with NEC ANSI/NFPA 70. A disconnect
breaker must be provided for AC input, DC input and AC output. Recommended cable sizes are
suitable for operation at a maximum temperature of 104°F (40°C).

Table 23 UPS currents and terminals—Input (for single-input unit, 208V operation)

Unit

Rating

60 178 205 300 M12 400 (2) 3/0 (2) 4/0

80 237 273 350 M12 460 (2) 4/0 (2) 300 kcmil

100 297 341 450 M12 610 (2) 350 (2) 400 kcmil

Table 24 UPS currents and terminals—Input (for dual-input unit only, 208V operation)

Unit

Rating

60 178 205 300 M12 400 (2) 3/0 (2) 4/0

80 237 273 350 M12 460 (2) 4/0 (2) 300 kcmil

100 297 341 450 M12 610 (2) 350 (2) 400 kcmil

Nominal

Input Current

Nominal

Input Current

Maximum

Input Current

Maximum

Input Current

OCP Device

Rating Bolt Size

OCP Device

Rating Bolt Size

75°C Wire

Current, Total

75°C Wire

Current Total

Copper

Wire

Copper

Wire

Aluminum

Wire

Aluminum

Wire

Table 25 UPS currents and terminals—Bypass input (for dual-input units, 208V operation)

Unit

Rating

60 167 225 M12 285 (1) 300 (2) 2/0

80 222 300 M12 400 (2) 3/0 (2) 4/0

100 278 350 M12 460 (2) 4/0 (2) 300 kcmil

Nominal

Input Current

OCP Device

Rating Bolt Size

75°C Wire

Current, total

Copper

Wire

Aluminum

Table 26 UPS currents and terminals—Output 208V

Unit

Rating

60 167 225 M12 285 (1) 300 (2) 2/0

80 222 300 M12 400 (2) 3/0 (2) 4/0

100 278 350 M12 460 (2) 4/0 (2) 300 kcmil

Nominal Output

Current

OCP Device

Rating

Bolt
Size

75°C Wire

Current, total

Copper

Wire

Aluminum

Table 27 AC/AC efficiency, loss and air exchange

AC/AC Efficiency Data

Normal Mode (dual conversion), % 95.5 maximum

Inverter Efficiency (DC/AC) (battery at nominal voltage 288VDC and full-rated linear load)

Rated Power, kVA 60-100

Battery Mode, % 94.8, Maximum

Heat Losses and Air Exchange

Rated Power, kVA 60 80 100

Normal Mode, kW 2.7 3.6 4.5

No Load, kW 0.9 1.2 1.5

(front intake, rear exhaust), L/sec (m

Maximum forced air cooling

Heat Dissipation, BTU/Hr (kWH)

Without Transformer 9213 (2.7) 12,284 (3.6) 15,354 (4.5)

3

/hr)

96 (346) 128 (462) 160 (575)

Wire

Wire

67 Liebert® eXM

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Specifications and Technical Data

Table 28 Rectifier input

Parameter

AC Input Parameters 50/60Hz, 3-Phase, 4-Wire Plus Ground

Rated AC Voltage 208/120V 220/127V

Input Voltage Range, Startup/Operating 177-253VAC 187-264VAC

Input Voltage Range, Operating

*

125-253VAC 132-264VAC

Frequency 50 or 60HZ (40-70Hz Range)

Power Factor 0.99 Full Load, 0.98 Half Load

UPS Capacities, kVA 60/80/100

Input Current (A), Rated 178/237/297 168/224/281

Input Current (A), Maximum 205/273/341 194/258/322

THD 5% Full Load

* Derated operation for reduced input voltage: 208V Operation (125-177VAC), 220V Operation (132-187VAC)

60-100kVA

Table 29 Recommended lug sizes (compression type) M12, 1/2" bolt

T&B Copper

Cable Size

Two Hole

#6AWG 256-030695-868 —

#4AWG 256-030695-733 —

#2-3AWG 54811BE —

#1AWG 54857BE —

#1/0AWG 256-30695-593 —

#2/0AWG 54862BE 60238

#3/0AWG 54864BE 60244

#4/0AWG 54866BE 60250

250kcmil 54868BE 60256

300kcmil 54870BE 60262

350kcmil 54872BE 60267

400kcmil 54874BE 60269

500kcmil 54876BE 60273

600kcmil 54878BE 60275

700kcmil 54879BE 60277

750kcmil 54880BE 60278

T&B Aluminum

Two Hole

Table 30 Battery cabinet system—UPS and Battery Cabinet

UPS Rating, kVA Battery Cabinet Breaker Maximum Battery Current, A Battery Cabinet Size, mm

60-100 465A 465 600, 880

Liebert® eXM

™

68

Specifications and Technical Data

Table 31 Inverter output to critical load

Parameter 60-100 kVA

Rated AC Voltage 208/120V or 220/127V, 50/60Hz, 3-Phase, 4-Wire Plus Ground

Frequency * 50/60Hz

105% load, continuous

Overload Capacity

Fault Current Short circuit for 200 ms

Non-Linear Load Capability 100%

Neutral Current Capability 170%

Steady State Voltage Stability ±1% (balanced load)

Voltage Regulation

Phase Balance

Transient Voltage Response 5%

THD

Sync Frequency Range Rated frequency ± 2Hz (selectable ± 0.5 to ± 3Hz)

Frequency Slew Rate 0.1-3Hz

Frequency Regulation

Voltage Adjustment Range ±5%

* Factory set to 60Hz; 50Hz selectable by commissioning engineer. Frequency converter operation is also selectable.

110% load, 60 min
125% load, 10 min
150% load, 60 sec

±1% for balanced load
±5% for 100% unbalanced load

120° ±1° for balanced load
120° ±15°± for 100 unbalanced load

<1.5% (0-100% linear load)
<5% (0-100% non-linear load)

±0.1% (single Liebert Power Module Assembly)
±0.25% (five Liebert Power Module Assemblies)

Table 32 Bypass input

Parameter 60-100 kVA

Rated AC Voltage 208/120V or 220/127V, 50/60Hz, 3-Phase, 4-Wire Plus Ground

Rated Current: 208V 167/222/278

220V 157/210/262

Overload 110% load, Continuous

Upstream Protection, Bypass Line Thermomagnetic circuit-breaker, rated up to 125% of nominal output current

Current Rating of Neutral Cable, A 1.7*ln

Frequency, Hz 50 or 60

Transfer Time Between Bypass
and Inverter, ms

Bypass Voltage Tolerance, %VAC

Bypass Frequency Tolerance, % +/- 10% or +/- 20% default: +/- 20%

Synchronization-Window

Uninterrupted transfer: <1ms
interrupted transfer: <20ms(40,60,80,100, can be selected)

Upper limit: +10, +15 or +20, default +15
Lower limit: -10, -20, -30 or -40; default: -20 (delay time to accept steady
bypass voltage: 10 sec)

±0.5, 1,2,3Hz
default value: ±2Hz

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9.0 MAINTENANCE

!

!

9.1 Safety Precautions

Observe the safety precautions in Important Safety Instructions on page 1.
Only properly trained and qualified personnel should perform maintenance on the UPS system.
Observe all of the warnings and cautions below before performing any maintenance on the UPS

system and associated equipment. Also observe the manufacturer's safety precautions pertaining to
the battery, along with the battery safety precautions in this document.

WARNING

Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Only Emerson or Emerson-trained service personnel should work on this equipment. Both AC

and DC high voltages are present in lethal amounts within this equipment. Extreme care
should be taken when working around UPS equipment.

Always identify the source of connecting wiring prior to disconnecting. Mark any disconnected
wires, so they can be properly reconnected.

Do not substitute parts except as authorized by Emerson.
Maintain the UPS cabinets free of foreign materials such as solder, wire cuttings, etc.
Call Liebert Services if you are not sure of the procedures to follow or if you are not familiar

with the design or operation of the equipment.

Maintenance

AVERTISSEMENT

Risque d'arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

L'entretien et la réparation de cet équipement doivent être confiés exclusivement à un
personnel qualifié d'Emerson ou formé par Emerson. Des hautes tensions c.a. et c.c. mortelles
sont présentes dans cet équipement. Faites preuve d'une grande prudence lorsque vous
travaillez à proximité d'un système ASC.

Identifiez toujours la source d'un câble de raccordement avant de le débrancher. Identifiez les
câbles déconnectés afin de pouvoir les reconnecter correctement.

Ne remplacez aucun composant sans l'autorisation expresse d'Emerson.
Assurez-vous que les armoires d'ASC sont exemptes de matériaux étrangers tels que des

résidus de soudure, des bouts de câble, etc.
Communiquez avec Liebert Services si vous doutez de la procédure à suivre ou si la

conception ou le fonctionnement de l'équipement ne vous sont pas familiers.

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Maintenance

!

!

WARNING

Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Extreme caution is required when performing maintenance.
Be constantly aware that the UPS system contains high DC as well as AC voltages. With

input power Off and the optional battery cabinet disconnected, high voltage at filter
capacitors and power circuits should be discharged within 30 seconds. However, if a power
circuit failure has occurred, you should assume that high voltage still exists after shutdown.
Check with a voltmeter before making contact.

AC voltage will remain on the bypass and output contactors and the static bypass switch,
unless the associated external circuit breakers are opened.

Check for voltage with both AC and DC voltmeters before making contact.
When the UPS system is under power, both the operator and any test equipment must be

isolated from direct contact with earth ground and the UPS chassis frame by using rubber
mats.

Some components within the cabinets are not connected to chassis ground.
Any contact between floating circuits and the chassis is a lethal shock hazard. Use differential

oscilloscopes when measuring a floating circuit. The differential input should have at least
800 V

Exercise caution that the test instrument exterior does not make contact, either physically or
electrically, with earth ground.

In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers, or
others approved for use in electrical fire fighting.

common mode input rating and a common mode rejection ratio of at least 80 dB.

rms

AVERTISSEMENT

Risque d'arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

Les opérations d'entretien requièrent une extrême prudence.
Soyez toujours conscient du fait que le système ASC contient des tensions c.c. et c.a. élevées.

Une fois l'alimentation d'entrée et du boîtier facultatif de batteries coupées, la haute tension
aux condensateurs de filtrage et aux circuits d'alimentation devrait se dissiper en moins de 30
secondes. En cas de défaillance d'un circuit d'alimentation, toutefois, il importe de présumer
qu'une tension élevée est présente même après l'arrêt. Vérifiez toujours les tensions avec un
voltmètre avant d'établir des contacts.

Les contacteurs de dérivation et de sortie, de même que le commutateur statique de
dérivation, continueront d'afficher une tension c.a. à moins que les disjoncteurs externes
associés ne soient ouverts.

Vérifiez les tensions avec des voltmètres c.a. et c.c. avant d'établir tout contact.
Lorsque le système ASC est sous tension, les responsables de l'entretien et l'équipement

d'essai doivent reposer sur des tapis de caoutchouc pour prévenir tout contact direct avec le
sol et avec le châssis du système lors des interventions.

Certains composants à l'intérieur des armoires ne sont pas connectés à la masse du châssis.
Tout contact entre les circuits flottants et le châssis présente un risque de décharge mortelle.

Utilisez des oscilloscopes différentiels lors des mesures d'un circuit flottant. L'entrée
différentielle devrait être d'au moins 800 Vrms en mode commun et avoir un taux de réjection
de mode commun d'au moins 80 dB.

Il importe de veiller à ce que l'extérieur des équipements d'essai n'entre pas en contact
physique ou électrique avec le sol.

En cas d'incendie associé à du matériel électrique, n'utilisez que des extincteurs à dioxyde de
carbone ou homologués pour la lutte contre les incendies d'origine électrique.

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9.2 Limited Life Components

The Liebert eXM UPS has a design life well in excess of 10 years. Well-maintained units can continue
to provide economic benefits for 20 years or more. Long-life components are used in the UPS wherever
practical and cost-effective. However, due to the currently available component material,
manufacturing technology limitations and the general function and use of the component, a few
components in your Liebert UPS will have a shorter life cycle and require replacement in less than 10
years.

The following components utilized in your UPS system have a limited life cycle and are specifically
exempt from warranty. To prevent a wear-out failure of one of these components affecting your
critical load operations, Liebert recommends these components be periodically inspected and replaced
before the expected expiration of their life cycle. The expected life of each component listed below is
simply an estimate and is not a guarantee. Individual users may have site-specific requirements,
maintenance and other environmental conditions that affect the length of the component's useful life
cycle.

Table 33 Component service life

Component Expected Life Replace in:

Air filters 5 years Check four times per year

In most cases, replacement components must exactly match the original component specifications.
These replacement components are not readily available from third-party component distributors.
For assistance with your specific component specifications, replacement component selection and
sourcing, call 1-800-LIEBERT. For customers using Emerson Network Power Liebert Services’
preventive maintenance services, periodic inspection of these components is part of this service, as
well as recommending component replacement intervals to customers to avoid unanticipated
interruptions in critical load operations.

Maintenance

9.3 Routine Maintenance

Become thoroughly familiar with the equipment, but at no time go beyond the specific procedures in
this manual while performing maintenance or correcting a malfunction. If you have any doubt as to
what must be done, call Emerson
instructions. The UPS is designed for unattended operation, but does require some common sense
maintenance.

• Keep good records—Troubleshooting is easier if you maintain historical service records.

• Keep the UPS free of dust and any moisture.

• Keep the UPS cool:

• Battery systems must be kept in the range of 72-77°F (22-25°C) in order to meet design
specifications for capacity and longevity.

• The UPS will reliably meet all performance specifications at temperatures up to 104°F (40°C),
and can be slightly derated for operation at even higher temperatures. However, performance
and longevity will be optimized when the UPS is operated at the same temperature as the
batteries.

• Keep connections tight.

• Tighten all connections at installation and at least annually thereafter. (See 9.3.3 - Torque
Requirements).

9.3.1 Record Log

Set up a maintenance log to record scheduled checks and any abnormal conditions.
The log should have space for all metered data including phase readings, alarm messages, UPS mode
of operation, air filter replacement date and observation notes. A second log should be maintained for
the battery module as directed by the battery manufacturer.
Emerson recommends a periodic walk-through inspection of the UPS and battery rooms to check for
visible and audible indications of problems. Log the inspection, metered parameter indications and
any discrepancies.

®

Network Power Liebert Services at 1-800-LIEBERT for further

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9.3.2 Air Filters

FRONT

Door Open

Replaceable
Air Filters

Replaceable
Air Filter

Operator
Control Panel

The air filters must be inspected and serviced on a regular schedule. The period between inspections
will depend upon environmental conditions. Under normal conditions, the air filters will require
cleaning or replacement approximately every two months.

All Liebert eXM models have replaceable filter elements behind the grille in the front of the unit. This
element can be changed with the UPS operating by opening the outer door. The Liebert eXM’s air
filters are washable and reusable. Two sets of air filters are shipped with each Liebert eXM.

Abnormal or dusty conditions will require more frequent cleaning and replacement of air filters.
Inspect installations in new buildings more often, then extend the inspection period as experience
dictates.

Replacing Air Filters

Installing the two air filter sizes in a Liebert eXM requires only a Phillips screwdriver. Each filter is
held in place by a bracket on either side of each filter. Two sets of washable and reusable dust filters
are shipped with each UPS. Refer to 9.3.2 - Air Filters for details about filter maintenance.

To replace a filter:

1. Open the UPS front door and locate the filters on the back side of the front door (see Figure 40).

2. Remove one bracket and loosen the screw on the second bracket. The second bracket need not be
removed.

3. Remove the dust filter to be replaced.

4. Insert the clean filter.

5. Reinstall the bracket, tightening the screw securely.

6. Tighten the screw on the second bracket.

Maintenance

Figure 40 Air filter replacement

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9.3.3 Torque Requirements

All electrical connections must be tight.
Tables 34 through 35 provide the torque values for the connections in the UPS and batteries. Use

these values unless the equipment is labeled otherwise.

Table 34 Busbars—Power wiring

Bolt Shaft Size Lb-in (Nm)

1/2" (M12) 428 (48)

Table 35 Terminal block with compression lugs—Control wiring

AWG Wire Size

or Range Lb-in (Nm)

#22 - #14

3.5 to 5.3

(0.4 to 0.6)

9.4 Detecting Trouble

It is important that the operator check the instrument readings if abnormal equipment performance
is suspected. Any metered value that differs appreciably from normal could mean an impending
malfunction, and should be investigated.

Items to check on the various UPS display screens include:

Maintenance

1. Output voltage of all phases should be within 2% of normal voltage. Output currents on each
phase should not normally differ by more than 20%. If a greater difference is noted, the load is
unbalanced and corrective action should be taken to redistribute the load, if possible.

2. If the UPS has not operated on battery power during the last 10 hours, the batteries should
require little charging current. Battery mimic should indicate normal DC voltage with relatively
little battery charge current.

3. Input current on each phase should be within 10% of the average input current. Alarm messages
indicate malfunction or impending malfunction. A daily check of the Operator Control Panel will
help to provide an early detection of problems. Refer to Appendix B - UPS Status Messages to
interpret alarm messages.

4. Tracing a problem to a particular section is facilitated by alarm messages and the metered
parameter indications. These are stored in the Status Reports and can be displayed at the
Operator Control Panel or at an optional terminal.

NOTE

If the UPS system has a blown fuse, the cause should be determined before you replace the fuse.
Contact Liebert Global Services.

9.5 Reporting a Problem

If a problem occurs within the UPS, review all alarm messages along with other pertinent data. This
information should be given to the Liebert Service dispatcher. Call 1-800-LIEBERT to report a
problem or to request assistance.

9.6 Corrective Actions

Recommended corrective actions for each alarm message on the Operator Control Panel and the
Remote Alarm Status Panel may be found in Appendix B - - UPS Status Messages.

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9.7 Recommended Test Equipment

Table 36 lists recommended test equipment and tools required to maintain, troubleshoot and repair
the UPS module. Instruments of equivalent range and accuracy may be substituted. All instruments
should be calibrated and be within the current calibration cycle. Calibration data for the instruments
should be maintained in equipment-history files and the instruments labeled for audit and
verification.

Table 36 Recommended test equipment and tools

Qty Test Equipment Manufacturer Model or Type

1 Oscilloscope Tektronix, H-P or Fluke DC to 50 MHz

2 Voltage Probes Tektronix, H-P or Fluke 10X, with 10 ft. Cable

2 Voltage Probes Tektronix, H-P or Fluke 100X, with 10 ft. Cable

1 Digital Multi-meter Fluke 8060, with Test Leads

1 Tool Kit N/A Standard electrical contractor tools

Maintenance

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Maintenance

APPENDIX A-HAZARDOUS SUBSTANCES OR ELEMENTS ANNOUNCEMENT

Table 37 Hazardous substances or elements

Hazardous Substances

Lead

Part Name

(Pb)

Hex copper stud X

PCBA X

AC capacitor X

DC capacitor X

Fan X

Cables X

LCD X X

Sensors X

Large-medium power magnetic
components

Circuit breaker / rotating switch X

Semiconductors X

Battery (when applicable) X

Insulation monitoring device (when
applicable)

✔ - Means the content of the hazardous substances in all the average quality materials of the part is within the limits specified in SJ/T-

11363-2006

X - Means the content of the hazardous substances in at least one of the average quality materials of the part is outside the limits specified

in SJ/T11363-2006

Emerson Network Power Co., Ltd. has been committed to the design and manufacturing of environment-friendly products. It will reduce and

eventually eliminate the hazardous substances in the products through unremitting efforts in research. However, limited by the current
technical level, the following parts still contain hazardous substances due to the lack of reliable substitute or mature solution:

1. All solders in the products contain lead.

2. Copper alloy contains lead.

3. Backlight bulb contains mercury.

4. The ceramic materials of the ceramic capacitor, the copper terminals and copper leads of metallic film capacity contain lead.

5. The glass of resistor contains lead.

6. The glass of LCD contains lead, and the backlight lamp contains mercury.

7. The lead in the battery is determined by the battery feature and technical levels.

8. The insulation monitoring device contains lead and PBDE.

About Environment Protection Period: The Environment Protection Period of the product is marked on the product. Under normal working
conditions and normal use of the products observing relevant safety precautions, the hazardous substances in the product will not seriously
affect the environment, human safety or property in the Environment Protection Period starting from the manufacturing date.

About battery: The battery life is dependent on the ambient temperature and charging / discharging times. The battery life will be shortened
if the battery is used under high temperature or in deep discharging status. Refer to the manufacturer’s product literature for details.

X

X

Mercury

(Hg)

Cadmium

(Cd)

Chrome

(Cr6+)

Biphenyl

(PBB)

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔ ✔

✔✔✔ ✔

Polybrominated

Polybrominated
Diphenyl Ethers

(PBDE)

X

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Maintenance

APPENDIX B-UPS STATUS MESSAGES

Table 38 shows all event messages as they appear in the current status area of the LCD or the
history log, along with a description and recommended actions, if any. For further information on the
current status area and the history log, see 6.10 - UPS History Log.

Table 38 UPS status messages

Event Message Description / Suggested Action (if any)

Comm. Fail

Battery Overtemp The battery temperature is over the limit. Check the battery temperature and ventilation.

Ambient Overtemp The Ambient temperature is over limit. Check the ventilation of UPS room.

Replace Battery Battery should be replaced. Contact Liebert Services at 800-543-2378 for assistance.

Battery Low Pre-warning

Battery End of Discharge

Mains Volt. Abnormal

Mains Undervoltage

Mains Freq. Abnormal

Rectifier Fault Rectifier Fault; Contact Liebert Services at 800-543-2378 for assistance.

Rectifier Overtemp

Charger Fault The Charger has failed. Contact Liebert Services at 800-543-2378 for assistance.

Input Fuse Fail Input fuse is open. Contact Liebert Services at 800-543-2378 for assistance.

Control Power 1 Fail

Mains Phase Reversed Input phase sequence is reversed. Contact Liebert Services at 800-543-2378 for assistance.

Soft Start Fail

Bypass Unable to Trace

The CAN communication between internal monitor and rectifier/inverter/bypass fails. Contact
Liebert Services at 800-543-2378 for assistance.

Before the end of discharging, battery under-voltage pre-warning should occur. After this pre­warning, battery should have the capacity for 3 minutes discharging with full load. The time is
user configured from 3 to 60 minutes.
Shut down the load in time.

Inverter turned off due to low battery voltage.
Check the utility failure and try to fix it.

Mains Voltage exceeds the upper or lower limit and results in rectifier shutdown.
Check the input line-to-neutral voltage amplitude of rectifier.

Mains Voltage is undervoltage (120v~132V).
Check the input line-to-line voltage amplitude of rectifier.

Mains frequency is out of limit range and results in rectifier shutdown.
Check the rectifier’s input voltage frequency.

The temperature of heat sink is too high to keep the rectifier running.
The UPS can recover automatically. Check the environment and ventilation.

Control Power 1 has failed or has been lost. Contact Liebert Services at 800-543-2378 for
assistance.

Rectifier could not start due to low DC bus voltage. Contact Liebert Services at 800-543-2378 for
assistance.

This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage is beyond the normal range.
The amplitude threshold is fixed for positive and negative 10% rating.
This alarm automatically resets once the bypass voltage goes normal.

1. First verify that the bypass voltage and frequency displayed on the panel is within the selected
range. Note here the rated voltage and frequency are specified by “Output voltage level” and
“Output frequency level” respectively.

2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage and
frequency presented to the UPS. Check the external supply if it is found to be faulty.

Contact Liebert Services at 800-543-2378 for assistance.

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Maintenance

Table 38 UPS status messages (continued)

Event Message Description / Suggested Action (if any)

This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage exceeds the limit.
This alarm automatically resets once the bypass voltage goes normal.
First check if there are some relevant alarms such as “Bypass disconnect open”, “Bypass phase
reverse” and “Mains neutral lost”. If they appear, solve them first.

1. Then verify that the bypass voltage and frequency displayed on the panel is within the bypass

Bypass Abnormal

Inverter Asynchronous

Inverter Fault

Fan Fault At least one of the cooling fans failed. Contact Liebert Services at 800-543-2378 for assistance.

Inverter STS (relay) Fail

Bypass STS Fail

Output Fuse Fail At least one of the output fuses is open. Contact Liebert Services at 800-543-2378 for assistance.

Control Power 2 Fail Control Power 2 is abnormal or lost. Contact Liebert Services at 800-543-2378 for assistance.

Unit Overload

System Overload

Unit Overload Timeout

limit. Note here the rated voltage and frequency are specified by “Output voltage level” and
“Output frequency level” respectively.

2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage and
frequency presented to the UPS. Check the external bypass supply if it is found to be faulty. If
the utility is likely to trigger this alarm frequently, the bypass limit can be changed a little larger
through the configuration software according to the customer’s agreement.

Contact Liebert Services at 800-543-2378 for assistance.

This alarm is triggered by an inverter software routine when the inverter and bypass waveforms
are misaligned by more than 6 degrees in phase. This alarm resets automatically once the
condition is no longer true.

1. First check if the alarm “Bypass unable to trace” or “Bypass abnormal” occurs. If so, solve it
first.

2. Verify the waveform of the bypass voltage. If it is too distorted, ask the customer to verify and
seek any possible measurements.

Contact Liebert Services at 800-543-2378 for assistance.

This alarm indicates a fault condition exists within the inverter.
Contact Liebert Services at 800-543-2378 for assistance.

At least one of the static switches of inverter side is open or short circuit. This fault is locked until
power off. Contact Liebert Services for assistance at 800-543-2378 for assistance.

At least one of the static switches of bypass side is open or short circuit. This fault is locked until
power off.
Contact Liebert Services at 800-543-2378 for assistance.

The UPS is confirmed to be overload when the load arises above 105% nominal rating.
The alarm automatically resets once the overload condition is removed.

1. Confirm that the alarm is true by checking the load percent indicated on the LCD panel to
determine which phase is being overloaded.

2. If the alarm is true, measure the actual output current to verify that the indications are valid.
Disconnect unnecessary load and ensure the safety. In a parallel system, a severe load
sharing error can also leads to the alarm.

Contact Liebert Services at 800-543-2378 for assistance.

The UPS parallel system is confirmed to overload when the total load arises above 105% nominal
rating for the set basic number of UPSs. The alarm automatically resets once the overload
condition is removed.

1. Confirm that the alarm is true by checking the system load percent indicated on the LCD
panel to determine which phase is being overloaded.

2. If the alarm is true, measure the actual output current to verify that the indications are valid.
Disconnect unnecessary load and ensure the safety. In a parallel system, a severe load
sharing error can also leads to the alarm.

The UPS is confirmed to overload and the overload times out.

Note 1: The highest loaded phase will indicate overload timing-out first.
Note 2: When the timer is active, then alarm “unit overload” should also be active as the load is

above nominal.
Note 3: When the timer has expired, the inverter Static Switch is opened and the load transferred
to bypass. The inverter shutdown and will restart after 10 seconds.
Note 4: If the load decreases lower than 95% after 5 minutes, the system will transfer back to
inverter mode.
Confirm that the alarm is genuine by checking the load percent indicated on the LCD. If an
overload is indicated then check the load, and investigate any additional load connected prior to
the alarm (if applicable).

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Table 38 UPS status messages (continued)

Event Message Description / Suggested Action (if any)

The phase sequence direction of bypass voltage is reversed.

Bypass Phase Reversed

Load Impact Transfer

Transfer Timeout

Load Sharing Fault

DC Bus Abnormal

System Transfer

DC Bus Overvoltage

LBS Active

Battery ground fault

Inverter turned On
manually

Inverter turned Off
manually

EPO Emergency Power Off

Transfer Confirm Interrupted Transfer Confirm

Transfer Cancel Interrupted Transfer is cancel

Unit Off Confirm Unit Turned Off Confirm

System Off Confirm System Turned Off Confirm

Fault Reset Fault Reset

Alarm Silence Alarm Silence

Turn On Fail Turn On Fail

Alarm Reset Audible Alarm Reset

Bypass Mode UPS in Bypass Mode

Normal Mode UPS in Normal Mode

Battery Mode UPS in Battery Mode

Output Disabled UPS Output Disabled

Maint. Disconnect Closed Maintenance Disconnect Closed

Reserved —

Output Disconnect Open Output Disconnect Open

Battery Reverse Connect the battery again and check the wiring of batteries.

No Battery Check the battery and the wiring of batteries.

Auto start After UPS was shutdown at EOD, inverter auto starts when utility is restored.

BCB closed BCB closed from dry contact signal.

Normally, the phase of Phase B lags 120 degrees behind Phase A, and the phase of Phase C
lags 120 degrees behind Phase B.
Verify that the phase rotation of the bypass supply presented to the UPS is correct, and rectify it if
it is found to be in error. Contact Liebert Services at 800-543-2378 for assistance.

A transfer to bypass occurred due to a large step load. The UPS should recover automatically.
Turn on connected equipment in sequential order to reduce the step loading of the inverter.

The load is on bypass power due to excessive number of transfers that occurred within the last
hour.
The UPS will recover automatically and will transfer the load back to inverter power within an
hour.

UPS working within a parallel system are not sharing load current correctly. Contact Liebert
Services at 800-543-2378 for assistance.

Shut off inverter due to abnormal DC bus voltage.
Contact Liebert Services at 800-543-2378 for assistance.

The whole paralleled UPS system transferred to bypass at the same time. This message will
appear on the UPS which passive transfer to bypass.

Rectifier, inverter and battery converter were shutdown because DC bus voltage is too high.
Check whether there is a fault in rectifier side. If no, then check whether overload occurs.
Restart the inverter after resetting the fault. If fault does not clear, contact Liebert Services at 800­543-2378 for assistance.

The LBS setting is active. The UPS is acting as an LBS master or slave in a dual bus
configuration.

Battery ground fault from dry contact signal. Contact Liebert Services at 800-543-2378 for
assistance.

Manual Turn On via front panel

Manual Turn Off via front panel

Maintenance

79 Liebert® eXM

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Table 38 UPS status messages (continued)

Event Message Description / Suggested Action (if any)

BCB open BCB open from dry contact signal.

Battery Float Charging Battery is float charging.

Battery Boost Charging Battery is boost charging.

Battery Discharging Battery is discharging.

Battery Period Testing Battery is period self-testing.

Batt. Capacity Testing Battery is capacity self-testing.

Batt. Maint. Testing Battery is maintenance self-testing.

Inverter in Setting Inverter is in parameter setting.

Rectifier in Setting Rectifier is in parameter setting.

Batt. Converter Fault

Operation Invalid This record is registered following an incorrect operation.

Byp. Abnormal Shutdown Both bypass and inverter voltages unavailable. Load interruption.

Mains Neutral Lost AC Input mains reference neutral not detected.

Battery Room Alarm Environment in battery room needs attention.

Rec Flash Update Rectifier firmware is being updated.

Inv Flash Update Inverter firmware is being updated.

Monitor Flash Update Monitor firmware is being updated.

LBS abnormal LBS is abnormal.

Battery converter output voltage beyond limits or battery fuse failed. Battery converter shuts
down. Battery backup not available.

Maintenance

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NOTES

Maintenance

81 Liebert® eXM

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Maintenance

Liebert® eXM

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82

While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2014 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Lieber t is a registered t rademark of Lieber t Corporation.
All names referred to are trademarks
or registered trademarks of their respective owners.

SL -25650_REV1_04-15

Technical Support / Service

Web Site

www.liebert.com

Monitoring

[e-mail]

800-222-5877

Outside North America: +00800 1155 4499

Single-Phase UPS & Server Cabinets

[e-mail]

800-222-5877

Outside North America: +00800 1155 4499

Three-Phase UPS & Power Systems

800-543-2378

Outside North America: 614-841-6598

Environmental Systems

800-543-2778

Outside the United States: 614-888-0246

Locations

United States

1050 Dearborn Drive

P.O. Box 29186

Columbus, OH 43229

Europe

Via Leonardo Da Vinci 8

Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy

[phone]

Fax: [phone]

Asia

29/F, The Orient Square Building

F. Ortigas Jr. Road, Ortigas Center

Pasig City 1605

Philippines

[phone]

Fax: [phone]

Emerson Network Power

Liebert
www.emerson.com