Emerson NX 30-200kVA, NX 50 and 60 Hz, NX 400V User Manual

Liebert NX™

User Manual
50 and 60 Hz, 30-200kVA, 400V

AC Power
For Business-Critical Continuity

TABLE OF CONTENTS

1.0 SINGLE MODULE UPS INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.1 UPS Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.2 External Battery Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.1 System Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.2 30 to 40kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.3 60-200kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.4 Moving the Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.5 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.6 Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.7 Final Positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.8 Floor Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.9 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.5 External Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.5.1 Rectifier and Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.5.2 External Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.5.3 UPS Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.6 Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.6.1 Cable Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.7 Control Cables and Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.7.1 Monitor Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.8 Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.8.1 Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.8.2 Maintenance Bypass Cabinet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.8.3 External Circuit-Breaker Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.8.4 Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.8.5 Emergency Power Off Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.8.6 External Bypass Switch Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.0 BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.3 Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.3.2 Temperature Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.4 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.5 Circuit Breaker Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.6 Moving the Battery Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.3.7 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.3.8 General Arrangement Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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2.4 Battery Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.4.1 Connection Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.4.2 Fitting the Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.4.3 Connecting the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.4.4 Battery Room Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.5 Battery Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

2.6 Battery Circuit Breaker Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2.6.1 Battery Temperature Sensor—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

3.0 UPS MULTI-MODULE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.2 Paralleled UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

3.2.1 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

3.2.2 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.2.3 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.2.4 Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

3.3 Hot-Standby UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

3.3.1 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

3.3.2 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

3.3.3 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

3.4 Dual Bus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.4.1 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.4.2 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.4.3 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.4.4 Control Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

3.4.5 Extended Dual Bus Synchronization Option (DBS Interface Box) . . . . . . . . . . . . . . . . . . . . . 51

4.0 EXTERNAL OPTIONAL CABINETS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

4.1 External Maintenance Bypass Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.2 Interlock with UPS Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.3 Isolation Transformer Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4.4 Top Cable Entry Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

6.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.1.1 Split-Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.1.2 Static Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.1.3 Battery Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.1.4 Battery Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.1.5 Redundant Control Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.1.6 Socket Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.2 Multi Module UPS—1+N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6.2.1 Features of NX Multi-Module UPS Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6.2.2 Requirements for Paralleling of UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

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6.3 Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.1 Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.2 Battery Mode (Stored Energy Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.3 Auto-Restart Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.4 Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.3.5 Maintenance Mode (Manual Bypass) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.3.6 ECO Mode (Single UPS Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.3.7 Parallel Redundancy Mode (System Expansion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.3.8 Hot-Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.3.9 Frequency Converter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.3.10 Source Share Mode (Co-Generation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.4 Battery Management—Set During Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.4.1 Normal Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.4.2 Advanced Functions (Software Settings Performed by the Commissioning Engineer) . . . . . 80

6.5 Battery Protection (settings by commissioning engineer) . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7.0 OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

7.2 Startup in Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

7.3 Startup into ECO Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

7.4 Battery Test Mode Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

7.4.1 Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

7.5 UPS Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

7.5.1 UPS Self-Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

7.6 Maintenance Bypass Procedure and UPS Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

7.7 Isolation of One Module in a Multi-Module System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

7.7.1 Multi-Module Systems With External Output CB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

7.7.2 Multi-Module System Without External Output Circuit Breaker 1 . . . . . . . . . . . . . . . . . . . . 87

7.8 Insertion of One Module in a Multi-Module System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

7.9 Shutdown Procedure—Complete UPS and Load Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.10 Emergency Shutdown With EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.11 Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions . . . . . . . . . . 90

7.12 Auto Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

7.13 Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

7.14 Changing the Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

7.15 Command Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

8.0 OPERATOR CONTROL PANEL AND DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

8.1.1 Mimic Power Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

8.1.2 Audible Alarm (Buzzer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

8.1.3 Direct Access Push Buttons (Keys) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

8.1.4 LCD Monitor and Menu keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

8.1.5 Detailed Description of Menu Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

8.2 All Status and Event Messages Displayed on the UPS Front Panel. . . . . . . . . . . . . . . . . . . 98

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8.3 Prompt (Pop-Up) Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

8.4 Dynamic Energy Flow Chart and UPS Help Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

8.5 Default Screen Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

9.0 OPTIONS—FOR ASSEMBLY INSIDE THE UPS CABINET . . . . . . . . . . . . . . . . . . . . . . . . . .105

9.1 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

9.1.1 Redundant Back-Feed Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

9.1.2 Seismic Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

9.1.3 Degree of Protection for the UPS Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

9.1.4 Battery Start Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

9.1.5 Bypass Current Sharing Inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

9.1.6 Battery Ground Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

9.1.7 Replacing Dust Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

9.1.8 Redundant Fan for Power Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

9.2 Communication and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

9.2.1 OC Web Card - SNMP/HTTP Network Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

9.2.2 Relay Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

9.2.3 Multiport-4 Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

9.2.4 OC485 Web Card – Modbus, Jbus, IGM Net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

9.2.5 Remote Alarm Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

10.0 TECHNICAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

10.1 Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

iv

FIGURES

Figure i Model number nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Figure 1 Residual current circuit breakers (RCCB) symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2 Monitoring board (U2) auxiliary terminal block detail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 3 Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 4 Output dry contacts and EPO wiring for firmware before M162 . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 5 EPO wiring for firmware M200 or later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 6 Narrow battery cabinet with top and bottom cable entry locations . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 7 Narrow battery cabinet with top cable entry location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 8 Wide battery cabinet with top and bottom cable entry locations . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 9 Wide battery cabinet with bottom cable entry location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 10 Wide battery cabinet with fuse or optional circuit breaker locations . . . . . . . . . . . . . . . . . . . . . . 25

Figure 11 Large battery cabinet dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 12 Large battery cabinet with fuse or optional circuit breaker locations . . . . . . . . . . . . . . . . . . . . . . 27

Figure 13 SENXA0NBCN4LCB.eps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 14 SENXA0NBCN4LF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 15 SENXA0NBCN5LCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 16 SENXA0NBCN5LF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 17 SENXA0NBCWXX3LCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 18 SENXA0NBCWXX3LF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 19 SENXA0NBCWXX4LCB_2x4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 20 SENXA0NBCWXX4LCB_4x2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 21 SENXA0NBCWXX4LF_2x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 22 SENXA0NBCWXX4LF_4x2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 23 Battery room design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 24 Battery circuit breaker box—30-120kVA and 140-200kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 25 Battery circuit breaker box connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 26 Single temperature sensor and monitor board—U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 27 Multiple temperature sensors, battery circuit breaker box and UPS module. . . . . . . . . . . . . . . . 44

Figure 28 Emergency power off connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 29 Typical 1+N system block diagram with common input supply, with separate batteries

and optional output / bypass distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 30 Dry contacts, multiple UPS modules with distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 31 Connection of 1+N system parallel control cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 32 Hot standby configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 33 Typical dual bus system configuration with static transfer switch and Load Bus Synch . . . . . . 50

Figure 34 Connections of a typical dual bus system utilising Load Bus Synch . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 35 External maintenance bypass cabinet with separate bypass input. . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 36 Equipment arrangement—UPS, battery cabinet and top-entry Isolation Transformer

Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 37 Single input external isolation transformer cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 38 Dual input external isolation transformer cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 39 Output external isolation transformer cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 40 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 41 General arrangement—30-40kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 42 Front view, door open30-40kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 43 Cable terminal layout—30-40kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 44 Location of parallel logic board M3 and options—30-40kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 45 Internal battery layout and connections—30-40kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Figure 46 General arrangement—60-80kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

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Figure 47 Front view doors open—60-80kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Figure 48 Cable terminal layout—60-80kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 49 General arrangement—100-120kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 50 Front view, door open—100-120kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 51 Parallel logic board location—100-120kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 52 Cable terminal layout—100-120kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Figure 53 General arrangement—140-200kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Figure 54 Front view, door open—140-200kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 55 Parallel logic board location—140-200kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 56 Cable terminal layout—140-200kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 57 Optional external Maintenance Bypass Cabinet, 600mm wide . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 58 Optional external Maintenance Bypass Cabinet, 800mm wide . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figure 59 Optional External Maintenance Bypass Cabinet, 850mm wide . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 60 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.1. . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 61 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.3. . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 62 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.5. . . . . . . . . . . . . . . . . . . . . . . . 74

Figure 63 Single unit block diagram with split-bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 64 1+N multi-module UPS with external maintenance bypass switch . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 65 Example of configuration for single UPS with external Maintenance Bypass Cabinet . . . . . . . . 85

Figure 66 Typical 1+N system block diagram with common input supply, with separate batteries

and optional output / bypass distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 67 UPS control and display panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 68 Graphic LCD monitor windows and keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 69 Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 70 Help screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Figure 71 Default screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Figure 72 Battery Start Option for UPS with external battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 73 Bypass current sharing inductances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Figure 74 Battery ground fault detection set connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Figure 75 Replacing the dust filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Figure 76 Communication bays and cable location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Figure 77 OC Web Card data summary window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 78 OC Web Card battery data summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 79 SiteNet MultiPort4 Intellislot pin configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Figure 80 OC485 Web card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

vi

TABLES

Table 1 Maximum steady state AC and DC currents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 2 Distance from floor to connection point on the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 3 Input dry contacts at X3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 4 Maintenance bypass cabinet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 5 External circuit-breaker interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 6 Output dry contact relays for firmware before M162 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 7 EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 8 Dimensions and weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 9 UPS-circuit breaker configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 10 Battery circuit breaker box legend. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 11 Battery control label description (X102) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 12 UPS control and display panel components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Table 13 Rectifier indicator—1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 14 Battery indicator—2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 15 Bypass indicator—3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 16 Inverter indicator—4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 17 Load indicator—5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 18 Status (Alarm) indicator—6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 19 Audible alarm key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 20 Menu key Icons and their meaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Table 21 UPS system window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Table 22 Descriptions of UPS menus and data window items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Table 23 UPS messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Table 24 Prompt windows, meanings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Table 25 Seismic anchor sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Table 26 Bypass current sharing inductors-dimensions, values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Table 27 Dry contact fault alarm signal is available for remote monitoring . . . . . . . . . . . . . . . . . . . . . . . 108

Table 28 Relay Card pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Table 29 SiteNet MultiPort4 Intellislot pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Table 30 NX communication options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Table 31 Compliance with European, international standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 32 Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 33 Efficiency, AC/AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Table 34 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Table 35 Rectifier AC input (mains) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Table 36 Intermediate DC circuit, battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 37 Inverter output to critical load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Table 38 Bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

. . . . . . . 117

vii

Dear Customer:

Please allow us to congratulate you on choosing a Liebert manufactured Uninterruptible Power System.

If this is your first Liebert UPS, we cordially welcome you to a lifetime relationship of after-sales support
designed to keep your Liebert UPS and your systems permanently at their peak performance.

If you already own and use a Liebert UPS, then we are doubly honoured by your decision to continue this
valued relationship.

Our philosophy is reflected in our mission statement “Keeping Business in Business,” and with this we strive
to contribute to the growth & success of your business.

Please give us your valued feedback to help us realise our mission.

EMERSON NETWORK POWER

viii

Figure i Model number nomenclature

NXa U

NX Product Line

Liebert NXa UPS module ratings:
30 & 40kVA (with internal battery)
60, 80, 100, 120, 140, 160, 200kVA (without internal battery)

Example:

0A0200

Feature Set for Region

A0 - EMEA
B0 - Aust/NZ

Revision
to Base
Unit

NXA0A0200U =

C0 - Japan
D0 - China
E0 - Latin Amer
F0 - Other

UPS Single Module

Output kVA

Input &
Output
Voltage

50/60Hz

Voltage Code
220/380 F
230/400 U
240/415 G

200kVA module for Europe and Middle East, 400V/230V output

Options Model Identification Note

Narrow battery cabinet NXA0BCN Specify: UPS kVA rating,

Wide battery cabinet NXA0BCW
Battery Circuit Breaker Box NXA0BCB Specify UPS kVA rating
Battery Start Kit NXA0UFXBB —
Battery Ground Fault detection kit NXA0UFXBGF —
Battery temperature probe (for external battery) NXA0UFXBTS —
Maintenance bypass cabinet (separate bypass input) NXA0MBX Specify total system kVA
Transformer cabinet NXA0TCX Specify UPS kVA & I/O Voltage
Fan Redundancy kit NXA0UFXRF Specify UPS kVA rating
Seismic Anchor kit NXA0UFXSAN —
Bypass current sharing inductance NXA0UFXBK —
Dual bus control cable 05-10-15 metr es NXA0UFXD Specify length in metres
Parallel control cable kit 05-10-15 metres NXA0UFXP Specify length in metres
Relay Card (On Bat, Bat Low, On Byp, Sum, UPS Fail)

Relay Card 4 (4 sets On Bat, bat Low)
Webbrowser/TCPIP/SNMP Card
Jbus/Modbus Card

RAM - Remote Alarm Monitor NXA0CFXRAM Requires RELAYCARD-INT
Modem card NXA0CFXMOD —
Large Battery Cabinet NXA0NBCL —
Maintenance bypass cabinet (separate bypass input) NXA0NMBX —
Transformer cabinet NXA0NTCX —
Air Filter (One Filter) NXA0UFXARF —
Dual Bus Extension Kit 50-150 Meters NXXXXMLBSKIT (XXX: 050 or 150)- 'Specify Length in metres.

Individual Battery Monitoring BDS 40 or BDS 256 Specify number of blocks. Consult Emerson

RELAYCARD-INT
MULTIPORT 4
OCWEB-LB
OC485CARD

3, 4 or 5-shelves
fuse or circuit breaker protection

Intellislot plug-in cards—3 slots available.

Used for extension in length or dual bus
arrangement between Nx and non-Nx
sources'

Network Power representatives for complete
configuration

ix

x

SAFETY PRECAUTIONS

This manual contains information concerning the installation and operation of this Emerson Network
Power Liebert NX Uninterruptible Power System (UPS).

This manual should be read before commencing installation.

The UPS must be commissioned and serviced by an engineer approved by the manufacturer (or
agent).

Failure to do so could result in personnel safety risk, equipment malfunction and invalidation of war­ranty.

The Liebert NX has been designed for Commercial/Industrial use only, and is not recommended for
use in life support applications.

This is a low emission CLASS A Uninterruptible Power System (UPS) product. In a residential envi­ronment, this product may nevertheless cause radio interference, in which case, the user may be
required to take additional measures.

Conformity and Standards

This equipment complies with CE directives 73/23 & 93/68 (LV Safety) and 89/336 (EMC), with Aus­tralia and New Zealand EMC Framework (C-Tick) and with the following product standards for Unin­terruptible Power System (UPS).

• EN / IEC / AS 62040-1-1—General and safety requirements for use in operator access area

• EN / IEC / AS 62040-2—EMC requirements; Class A compliant

• EN / IEC / AS 62040-3—Performance requirements and test methods

For more details, see 10.0 - Technical Specifications

Continued compliance requires installation in accordance with these instructions and the use of man­ufacturer approved accessories only.

WARNING

!

High Leakage Current

EARTH CONNECTION IS ESSENTIAL BEFORE CONNECTING THE INPUT SUPPLY.

Earth leakage current exceeds 3.5 mA and is less than 1000 mA for 30-80kVA, less than
2000mA for 100-120kVA. models and less than 2500mA for 140-200kVA models.

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.

WARNING

!

Back-Feed Protection Notice

This UPS is fitted with a voltage-free contact closure signal for use with an external
automatic disconnect device (supplied by others) to protect against back-feeding voltage into
the bypass input. If this signal is not used by the installer, a label must be added at the
external bypass input disconnect device to warn service personnel that the circuit is
connected to a UPS.

The text to use is the following or equivalent:

ISOLATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS
CIRCUIT.

1

User-Serviceable Parts

All equipment maintenance and servicing procedures involving internal access requires the use of a
tool and should be carried out only by trained personnel. There are no user-serviceable parts behind
covers requiring a tool for removal.

This UPS is fully compliant with safety regulations for equipment located in an operator accessible
area. Hazardous voltage is present within the UPS and battery enclosure but out of reach of non-ser­vice personnel. Contact with hazardous voltage is minimized by housing live parts behind safety pan­els that require a tool for their removal. No risk exists to any personnel when operating the
equipment in the normal manner, following the recommended operating procedures.

Battery Voltage Exceeds 400VDC

All physical battery maintenance and servicing requires the use of a tool or a key and should be car­ried out only by trained personnel.

WARNING

!

Special care should be taken when working with the batteries associated with this equipment.

When connected together, the battery terminal voltage will exceed 400VDC and is potentially
lethal.

Battery manufacturers supply details of the necessary precautions to be observed when working on,
or in the vicinity of, a large bank of battery cells. These precautions should be followed implicitly at all
times.

Attention should be paid to the recommendations concerning local environmental conditions and the
provision of protective clothing, first aid and fire-fighting facilities.

2

1.0 SINGLE MODULE UPS INSTALLATION

1.1 Introduction

This following section describes the requirements that must be taken into account when planning the
positioning and cabling of the Liebert NX uninterruptible power supply and related equipment.

This chapter is a guide to general procedures and practices that should be observed by the installing
engineer. The particular conditions of each site will determine the applicability of such procedures.

WARNING

!

Professional Installation Required

Do not apply electrical power to the UPS equipment before being authorised to do so by the
commissioning engineer.

The UPS equipment shall be installed by a qualified electrical tradesperson in accordance
with the information contained in this manual. All equipment not referred to this manual is
shipped with details of its own mechanical and electrical installation.

NOTE

Three-phase, 4-wire input supply required.

The standard Liebert NX UPS is suitable for connection to 3-phase, 4-wire (+ Earth) TN, TT
and IT AC power distribution systems (IEC60364-3). Optional 3-wire to 4-wire conversion
transformers are available. If it is used in IT AC power distribution systems, a 4-pole circuit
breaker must be used on the input and refer to the relative IT Systems’ standard

Single Module UPS Installation

WARNING

!

Battery Hazards

Special care should be taken when working with the batteries associated with this equipment.
When connected together, the battery terminal voltage will exceed 400VDC and is hazardous.

Eye protection should be worn to prevent injury from accidental electrical arcs.

Remove rings, watches and all other metal objects.

Use only tools with insulated handles.

Wear rubber gloves.

If a battery leaks electrolyte or is otherwise physically damaged, it must be replaced, stored in
a container resistant to sulfuric acid and disposed of in accordance with local regulations.

If electrolyte comes into contact with the skin, the affected area should be washed
immediately with water.

1.2 Preliminary Checks

Before installing the UPS, please carry out the following preliminary checks:

1. Visually examine the UPS and battery equipment for transit damage, both internally and
externally. Report any damage to the shipper immediately.

2. Verify that the correct equipment is being installed. The equipment supplied has an identification
tag on the back of the main door reporting: the type, size and main calibration parameters of the
UPS.

3

1.3 Location

1.3.1 UPS Room

The UPS and its internal battery is intended for indoor installation and should be located in an envi­ronment with clean air and with adequate ventilation to keep the ambient temperature within the
specified operating range (see Table 33).

All models in the Liebert NX UPS range are air-cooled with the aid of internal fans. Cold air enters
through ventilation grilles at the front of the cabinet for NXa 30-120kVA and through ventilation
grilles located at the front and bottom of the cabinet for NXa 140-200kVA. Hot air is released through
grilles at the top. Do not cover the ventilation openings.

If necessary to avoid room temperature build-up, install a system of room extractor fans. Optional air
filters are available if the UPS is to operate in a dusty environment.

The UPS heat dissipation detailed in Table 34 can be used as a guide for air conditioning sizing,
depending on the selected mode of operation:

• Normal Mode (VFI SS 111 Double Conversion UPS)

• ECO Mode (VFD SS 311 Stand By UPS)

If in doubt use Normal Mode figures.

NOTE

The UPS is suitable for mounting on concrete or other non-combustible surface only.

Single Module UPS Installation

1.3.2 External Battery Room

Batteries should be mounted in an environment where the temperature is consistent and even over
the whole battery. Temperature is a major factor in determining the battery life and capacity. Typical
battery manufacturer performance data are quoted for an operating temperature between 20 and
25°C (68 and 77°F). Operating above this range will reduce the battery life while operation below this
range will reduce the battery capacity. In a normal installation the battery temperature is main­tained between 15°C and 25°C (59 and 77°F). Keep batteries away from main heat sources or main air
inlets etc.

Where the batteries are located externally to the main UPS cabinet, a battery protection device
(e.g., fuses or circuit breakers) must be mounted as close as possible to the batteries themselves, and
connected using the most direct route possible.

1.3.3 Storage

Should the equipment not be installed immediately, it must be stored in a room for protection against
excessive humidity and or heat sources (see Table 33).

CAUTION

!

An unused battery must be recharged periodically per battery manufacturer
recommendation. Temporarily connecting the UPS to a suitable AC supply mains and
activating it for the time required for recharging the batteries can achieve this.

4

1.4 Positioning

The cabinet is mounted on four casters for ease of positioning and for moving short distances. Jacking
feet are provided to prevent the UPS from moving once it has been wheeled to its final position.

For optimal design life, the place chosen must offer:

•Easy connection

• Enough space to easily work on the UPS

• Sufficient air exchange of enough to dispel heat produced by UPS

• Protection against atmospheric agents

• Protection against excessive humidity and very high heat sources

• Protection against dust

• Compliance with the current fire prevention requirements

• Operating environment temperature between 20°C and 25°C (68 and 77°F). The batteries are at
maximum efficiency in this temperature range (see Table 33).

The UPS cabinet is constructed around a steel chassis with removable panels. The top and side panels
are secured to the chassis by screws.

Access to the power terminals, auxiliary terminals blocks and power switches is from the front. Oper­ational status and alarm information is provided through the front door operator control panel. Mod­els 40kVA and below house both the power components and an internal battery. Cooling air enters in
the front of the NXa 30-120kVA and the front and bottom of NXa 140-200kVA; it is exhausted out the
top of each.

1.4.1 System Cabinets

A UPS may comprise a number of cabinets, depending on design requirements (e.g., UPS cabinet, exter­nal battery cabinet, external bypass cabinet). In general, all the Liebert cabinets used in a particular
installation are of the same height and designed to be positioned side-by-side to form a matching array.

Refer to 5.0 - Installation Drawings for assistance on positioning the cabinets described below.

Single Module UPS Installation

1.4.2 30 to 40kVA UPS

The UPS consist of a single cabinet, which uses typically forty (40) 12V battery blocks, fitted inter­nally and connected in series to provide a nominal battery voltage.
the batteries fitted.

An extended battery option is available. This comprises a separate cabinet containing additional bat­teries that can be connected to the UPS to increase its battery run time. Battery cabinets and batter­ies are usually shipped separately.

1.4.3 60-200kVA UPS

The 60 to 200kVA consist of a single cabinet without any internal battery. Usually, with 60 to 200kVA
UPS installations, the batteries are contained in a purpose-built battery cabinet, which sits alongside
the main UPS equipment. Batteries are accessible in the external cabinet from the front, making it
unnecessary to allow for side access.

1.4.4 Moving the Cabinets

WARNING

!

Ensure that the UPS weight is within the designated surface weight loading of any handling equip­ment. See Table 35.

UPS and optional cabinets (battery cabinets, top cable entry cabinets, etc.) can be handled by means
of a forklift or similar equipment.

The UPS cabinet also can be moved short distances by its casters.

Ensure that any equipment used to move the UPS cabinet has sufficient lifting capacity.

The UPS is fitted with casters. Take care to prevent the NX from moving when unbolting the
unit from its shipping pallet. Ensure that adequate personnel and lifting aids are available
when removing the shipping pallet.

The UPS may be shipped without

NOTE

Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum.

5

1.4.5 Clearances

The Liebert NX has no ventilation grilles at either side of the UPS. To enable routine tightening of
power terminations within the UPS, in addition to meeting any local regulations, Liebert recom­mends providing adequate clearance in the front of the equipment for unimpeded passage of person­nel with the doors fully opened. It is important to leave 800mm (31.5") clearance above the UPS to
permit adequate circulation of air coming out of the unit.

1.4.6 Access

The component layout of the UPS supports front and top access while servicing, diagnosing and
repairing the UPS, thus reducing the space requirement for side and rear access.

1.4.7 Final Positioning

The UPS cabinets are fitted with casters on the base to allow ease of movement and positioning.

WARNING

!

Casters are strong enough for movement across even surfaces only. Caster failure could occur
if they are subjected to shock loading.

When the equipment has been finally positioned, ensure the adjustable feet are set so that the UPS
will remain stationary and stable.

1.4.8 Floor Anchoring

Single Module UPS Installation

Diagrams in 5.0 - Installation Drawings show the location of the holes in the base plate through
which the equipment may be bolted to the floor. If the equipment is to be installed on a raised floor it
should be mounted on a pedestal suitably designed to accept the equipment point loading.

1.4.9 Cable Entry

Cables can enter the Liebert NX UPS and battery cabinet from below. Cable entry is made possible by
removing a blanking piece fitted at the bottom of equipment to reveal the cable entry hole.

Top Cable Entry—Optional

Optionally a top cable entry extension may be used. The cabinet extends the overall width of the UPS
and permits connection of all incoming AC/DC power cables from above.

The top cable entry option is fitted on the side of the UPS cabinet and is supplied without side panels;
the side cover from the UPS being used.

The cabinet with cables coming in from the top for the 30-40 kVA UPS must be positioned on the left
side; the cabinet for the 60 to 200 kVA UPS can be positioned on either side.

This facilitates cable entry through the top metal panel after the appropriate cable entry holes have
been cut.

NOTE

The top cable entry also includes the power connection cables between the cabinet and the UPS.

1.5 External Protective Devices

Circuit breakers or other protective devices must be installed in the AC supply, external to the UPS.
This chapter provides guidelines for qualified installers who must have knowledge of local wiring
practices pertaining to the equipment to be installed.

6

1.5.1 Rectifier and Bypass Input

Overcurrent protection must be installed at the distribution panel of the incoming main supply. The
protection must discriminate with the power cables current capacity and with the overload capacity of
the system (see Table 38). As a guideline, a thermomagnetic circuit breaker, with an IEC 60947-2
trip curve C (normal) for 125% of the current listed in Table 1 is suitable.

Split-Bypass—If a split-bypass is used, install separate protective devices for the rectifier and for
the bypass in the incoming mains distribution panel.

NOTE

Rectifier and bypass input sources must be referenced to the same neutral potential.

NOTE

Earth Leakage (RCD)

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

For IT power systems, four-pole protective devices must be used, external to the UPS, both
upstream of the input distribution panel and downstream (toward the load).

• sensitive to DC unidirectional pulses (Class A)

• insensitive to transient current pulses, and

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

Single Module UPS Installation

Figure 1 Residual current circuit breakers (RCCB) symbols

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 split­bypass input currents.

The residual earth current introduced by the RFI suppression filter inside the UPS is greater than

3.5mA, 1000mA for 30-80kVA, 2000mA for 100-120kVA models and less than 2500mA for
140-200kVA models. Liebert recommends verifying the selectivity with all other differential devices
both upstream of the input distribution board and downstream (toward the load).

1.5.2 External Battery

The UPS and its associated batteries are protected against overcurrents through a DC compatible dis­connect device.

1.5.3 UPS Output

Any external distribution board used for load distribution shall be fitted with protective devices that
discriminate with those used at the bypass input to the UPS and with the UPS overload characteris­tics (see Table 38).

7

1.6 Power Cables

The cable design must comply with the voltages and currents provided in this section, follow local wir­ing practices and take into consideration the environmental conditions (temperature and physical
support media).

For cable entry terminal, refer to Figures 43, 48, 52 and 56.

WARNING

!

Table 1 Maximum steady state AC and DC currents

RATING

Before starting the UPS, ensure that you are aware of the location and operation of the
external isolators that connect the ups input/bypass supply to the mains distribution panel.

Check that these supplies are electrically isolated and post any necessary warning signs to
prevent their inadvertent operation.

Input Mains

with full battery

UPS

(kVA)

recharge

3ph + N

Single Module UPS Installation

NOMINAL CURRENT: Amps BUSBAR STUD SIZE

Bypass/Output

at full load

3ph + N

Battery at

minimum

battery

voltage

(400VDC)

Input/Output/

Bypass
Cables

Battery

Cables
(Bolts)

Torque

Load, Nm

(lb/ft)380V 400V 415V 380V 400V 415V Bolt Ø holes

30 50 47 45 46 43 42 64
40 65 62 60 61 58 56 85

60 97 92 88 91 86 83 128
80 128 122 117 121 115 111 170

100 160 152 146 152 145 139 213
120 191 181 175 182 174 167 255
140 222 211 204 212 201 194 298
160 254 241 232 242 230 222 340
200 317 301 290 303 288 277 426

For terminal location – refer to 5.0 - Installation Drawings

M6 7 - 5 (1.12)

M8 9

M10 Ø11

M10 11

Table 2 Distance from floor to connection point on the equipment

Minimum Distance, mm (in)

UPS

Rectifier AC Input supply 350 (13.8) 305 (12) 324 (12.8)
Bypass AC Input supply 300 (11.8) 250 (9.8) 310 (12.2)
UPS Output AC 260 (10.2) 250 (9.8) 310 (12.2)
Battery Power 1030 (40.5) 230 (9) 360 (14.2)
Auxiliary cables:

Monitor board (U2)
Communications 1070(42.1) 1250(49.2)
Earth 350 (13.8) 275 (10.8) 338 (13.3)

UPS 30/40 kVA UPS 60-80 kVA UPS 100-120 kVA UPS 140-200 kVA

1320(52) 1500 (59)

M8: 13 (2.9)

M10: 26 (5.8)

WARNING

!

Failure to follow adequate earthing procedures may result in electromagnetic interference or
in hazards involving electric shock and fire.

8

1.6.1 Cable Termination

NOTE

Once the equipment has been finally positioned and secured, connect the power cables as described in
the following procedure.

Refer to the appropriate cable connection drawing in 5.0 - Installation Drawings.

1. Verify that the UPS equipment is isolated from its external power source and all the UPS power

2. Open the door to the UPS cabinet and remove one of the two protective cover to gain access to the

3. Connect the safety earth and any necessary bonding earth cables to the copper earth busbar

The operations described in this section must be performed by authorised electricians or
qualified technical personnel. If you have any difficulties, do not hesitate to contact our
Customer Service and Support Department. See the back page of this manual for contact
information.

isolators are open. Check that these supplies are electrically isolated and post any necessary
warning signs to prevent their inadvertent operation.

desired connection bars.

• the lower protective cover houses the 60-200kVA connection bars

• the left protective cover houses the 30-40kVA connection bars
The protective cover on the UPS cabinet of 60 to 200kVA models must be removed after the

handles on the power isolators have been removed.

located on the floor of the equipment below the power connections. All cabinets in the UPS must
be connected to the user’s ground connection.

Single Module UPS Installation

NOTE

The earthing and neutral bonding arrangement must be in accordance with local and national
codes of practice.

Identify and make power connections for incoming cables according to one of the two procedures
below, depending on the type of installation.

Common Input Connections

4. For common bypass and rectifier inputs, connect the AC input supply cables between the mains
distribution panel and the UPS input (U1-V1-W1-N terminals) and tighten the connections to
5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm for M10 bolts. Ensure correct phase rotation.

Split-Bypass Connections

5. If a split-bypass configuration is used, connect the AC input supply cables to the rectifier input
busbars (U1-V1-W1-N terminals) and the AC bypass supply cables to the bypass input
(U3-V3-W3-N terminals) and tighten the connections to 5Nm for M6 bolts, to 13Nm for M8 bolts
or to 26Nm (M10 bolt). Ensure correct phase rotation.

NOTE

For split-bypass operation, ensure that the linking busbars between bypass and rectifier input
are removed.

The AC input and the AC bypass supplies must be referenced to the same neutral point.

Frequency Converter Mode

If a frequency converter configuration is used, connect the AC input supply cables to the rectifier
input busbars (U1-V1-W1-N terminals). Torque to 5Nm for M6 bolts, to 13Nm for M8 bolts or to
26Nm (M10 bolt). Ensure correct phase rotation. There will not be any AC bypass supply cables to the
bypass input (U3-V3-W3-N terminals) and tighten the connections.

NOTE

For frequency converter operation, ensure that the linking busbars between bypass and rectifier
input are removed.

9

Single Module UPS Installation

Output System Connections

6. Connect the system output cables between the UPS output (U2-V2-W2-N terminals) and the
critical load and tighten the connections to 5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm for
M10 bolts. Ensure correct phase rotation.

External UPS Battery Connection (60kVA Models and Above, Option for 30-40kVA Models)

Connect the battery cables between the UPS terminals (+\-) and its associated battery circuit
breaker. Observe the battery cable polarity.

NOTE

When connecting the cables between the battery extremities to the circuit breaker always
connect the circuit breaker end of the cable first.

WARNING

!

If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, ensure that the system output cables are safely isolated at their ends.

Internal UPS Battery Connection (30/40kVA only)

7. The battery consists of a series string connection of 5 x 8 (or 10) x 12V 6-cell battery blocks.
a. Ensure that the eight (or 10) battery blocks in each tier (tray) are interconnected.
b. Connect the positive and negative cables to the UPS terminals.
c. Plug in the cables between the tiers.
d. Ensure correct polarity battery string series connections (i.e., intertier and

interblock connections are from positive to negative terminals.

WARNING

!

Hazardous Battery Terminal Voltage 480VDC

Ensure correct polarity of string end connections to the UPS terminals, i.e., positive to
positive and negative to negative, but leave these UPS terminal cables disconnected until
connection is authorised by the commissioning engineer.

Ensure correct polarity of string end connections to the battery circuit breaker and from the
battery circuit breaker to the UPS terminals, i.e., positive to positive and negative to negative,
but disconnect one or more battery cell links in each tier.

Do not reconnect these links and do not close the battery circuit breaker before authorised by
the commissioning engineer.

8. Refit all protective covers removed for cable installation.

10

1.7 Control Cables and Communication

1.7.1 Monitor Board 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).
The monitor board, arranged for this purpose, is located on the rear of the operator access door. 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)

• Intellislot™ interface

• Modem interface

• Temperature detect interface

Figure 2 Monitoring board (U2) auxiliary terminal block detail

J8

LCD

Single Module UPS Installation

J1J3

J22

X7

J2

J13

BFP INV ACF

X1 X2 X3

EPO

J10J30J26J4J28J25J21

Dry In MBC BCB

J23

J12

J9

J15

J16

J17

Intellislot 2
Intellislot 1
Intellislot 3

The black square ( )
on each s lot indi cates P in 1.

X4

J24

X6

PWR
Modem
SNMP Card

X4

X5

11

1.8 Dry Contacts

The UPS provides input dry contacts and output dry contacts.

1.8.1 Input Dry Contacts

There are several input dry contacts at the X3 slot.

X3 Ancillary Control and Alarms

X3 IN DRY: Environmental, Battery Ground Fault and Generator Contacts

The UPS accepts external signalling from voltage-free (dry) contacts connected to finger-proof, push­in terminal X3 IN DRY. Subject to prior software programming, the signalling is accepted by the UPS
when connection between the relevant terminal and the +12V terminal is altered. Cables connected to
X3 IN DRY must be segregated from power circuits (for screening purposes), double insulated and of a
typical 0.5 to 1mm
respectively.

Figure 3 Input dry contacts

12V

2

cross-section area for maximum runs between 25 and 50 meters (82-164 ft),

Single Module UPS Installation

12V 12V

12V

X3

J4 J26 J30 J10

12V

BtG

GEN

ENV

12V

GND

T_IT

AUX_I

T_OT

AUX_O

FUSE

F_FAN

OL

GND

Table 3 Input dry contacts at X3

Position

J4.1 ENV
J4.2 BtG Battery Ground Fault Detection (NC)
J4.3 GEN
J4.4 +12V +12V Power

1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.

Name

Description

3

Battery Room Alarm (NC)

1,2

On Generator (NO)

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.

FB

DRV

2

12

1.8.2 Maintenance Bypass Cabinet Interface

J26 and J30 are the MBC interface.

Table 4 Maintenance bypass cabinet interface

Position

J26.1 T_IT
J26.2 AUX_I Reserved
J26.3 +12V +12V Power
J26.4 GND Power Ground
J30.1 FUSE Reserved
J30.2 F_FAN Fan Fail Alarm (NC)
J30.3 T_OT
J30.4 AUX_O Reserved

1

- Must be configured by software before becoming active

Name

Description

1

Input transformer overtemperature (NC)

1

Output Transformer Overtemperature (NC)

Single Module UPS Installation

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.

1.8.3 External Circuit-Breaker Interface

J10 is the interface to any external battery circuit breaker (BCB).

Table 5

Position

J10.1 DRV BCB Driver Signal - Output (N.O.)
J10.2 FB BCB Contact State - Input (N.O.)
J10.3 GND Power Ground

J10.4 OL

External circuit-breaker interface

Name

NOTE

All auxiliary cables of terminal must be double insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.

Description

BCB On-Line - Input - This pin will become active when
BCB interface is connected. (N.O.)

2

2

13

1.8.4 Output Dry Contacts

There are three output dry contact relays at the X1 slot (see Figure 4 and Table 6)

Single Module UPS Installation

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.

Figure 4 Output dry contacts and EPO wiring for firmware before M162

J13

BFP_C

BFP_S

BFP_O

J21 J25 J25

INV_S

INV_C

INV_O

ACF_C

ACF_S

ACF_O

Table 6 Output dry contact relays for firmware before M162

Position Name

J13.2 BFP_O Bypass feedback protection relay; normally ope n. Closed when bypass SCR is shorted.
J13.3 BFP_S Bypass feedback protection relay center
J13.4 BFP_C Bypass feedback protection relay; normally closed. Open when bypass SCR is shorted.
J21.2 INV_O Inverter mode relay; normally open. Closed when UPS is in inverter mode.
J21.3 INV_S Inve rter mode relay center
J21.4 INV_C Inverter mode relay; normally closed. Open when UPS is in inverter mode.
J25.2 ACF_O Main input fault relay; normally open. Closed when main input is in fault.
J25.3 ACF_S Main input fault relay center
J25.4 ACF_C Main input fault relay; normally closed. Open when main input is in fault.

Description

2

+12V

X2X1

EPO-LEPO-H

Figure 5 EPO wiring for firmware M200 or later

J28

EPO-NO EPO-NC

1.8.5 Emergency Power Off Input

The UPS has an Emergency Power Off (EPO) function that operates 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 X2 slot, shown in Figure 4, is the remote EPO input interface. The EPO has an NO/NC contact
point that becomes active when shorting terminals X2: 3 and 4 or open terminal connection X2: 2 and 1

If an external emergency stop facility is required, it is connected terminals X2: 1&2 or X2: 3&4 of the
auxiliary terminal block (X2). It also is connected to the normally open or normally closed remote stop

X2

14

Single Module UPS Installation

switch between these two terminals using shielded cable (see Figure 4 and Table 7). If this function
is not used, terminals X2: 3&4 must be opened and X2: 1&2 must be closed.

Table 7 EPO input contact relays

Position Name

J28.1 EPO_NC EPO Activated when opened to J28.2
J28.2 EPO_NC EPO Activated when opened to J28.1
J28.3 EPO_NO EPO Activated when sh orted to J28.4
J28.4 EPO_NO EPO Activated when sh orted to J28.3

Description

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) when the remote EPO is activated.

NOTE

Normally closed EPO – X2: 1,2, these terminals are supplied factory-linked on the monitor
board and must remain installed if using NC contacts.

NOTE

All auxiliary cables of terminal must be double insulated. Wire should be 0.5-1.5mm

2

(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.

X5: Auxiliary DC Power Output

Auxiliary DC power for modem or external SNMP card. The voltage is between 9V to 12V. The maxi­mum current is 500mA.

X6: Analog Input Interface

Two analog signal channels with an input range is from 0 to +12V. The precision of detection is ÷3%.

• X6 pin 1: Not used

• X6 pin 2: +12V

• X6 pin 3: ENV-T – environment temperature detection

• X6 pin 4: GND

X7: External Battery Temperature Detector Interface

Interface for TMP12Z temperature detector, normally connected to an external battery cabinet (see
Figure 26).

Pin reference:

• X7 pin 1: Not used

• X7 pin 2: +12V (Power supply for Temperature Monitoring Probe)

• X7 pin 3: BAT-T (Battery Temperature signal)

• X7 pin 4: GND

15

Serial Ports RS232-1 and RS232-2

RS232-1 provides serial data and is intended for direct use with Liebert MultiLink monitoring and
server shutdown software.

RS232-2 provides serial data and is intended for use by authorized commissioning and service person­nel.

These serial ports are shared with the optional Web browser, SNMP, ModBus and relay cards. Refer
to Table 31 regarding compatibility of simultaneous use.

Intellislot Web Browser, SNMP, ModBus and Relay Cards Interface

There are three interface slots available for optional Web browser, SNMP, ModBus and Relay cards
as illustrated in 9.0 - Options—For Assembly Inside the UPS Cabinet.

1.8.6 External Bypass Switch Interlock

EXT-Maint X3-1&2 on UPS Parallel Board M3 (leave open if no external bypass switch is used)

Provides external maintenance bypass interlock protection for the UPS. Short circuit means external
bypass closed.

EXT-Out (X3-3&4) on UPS Parallel Board (leave shorted if no external output switch is used). Pro­vides external output interlock protection for paralleled UPS modules. Short circuit means external
output switch closed.

Single Module UPS Installation

NOTE

UPS Parallel Board M3 is located behind protective covers accessible after opening the UPS
front door—removal of this barrier requires the use of a tool and is restricted to service
personnel.

NOTE

Jumper JP1 (located next to X3) needs to be removed for X3:3&4 to work properly.

16

2.0 BATTERY INSTALLATION

2.1 Introduction

The UPS battery bank consists of battery blocks connected in series to provide a D.C. string voltage as
required by the UPS converter. The 'AUTONOMY TIME' (the time during which the battery can
maintain supply to the load in the event of a mains failure) is limited by the ampere-hour capacity of
the battery blocks and in some cases this results in several strings being connected in parallel.

The NX 30-40kVA has internal batteries, but longer run time is available by using an external bat­tery cabinet.

The battery cabinet will be supplied in one of the following forms:

1. Complete installation, comprising the battery cabinet, batteries and protective device.

2. Battery cabinets and protective device only—batteries supplied by others

3. Battery cabinet only—batteries and circuit breaker supplied by others.

NOTE

30kVA to 40kVA UPS models contain an internal battery compartment that can accommodate
up to 42 blocks 24 Ah/12V batteries.

The battery bank may be disconnected from the UPS for maintenance or service. The circuit breaker
can be switched ON or OFF manually and further battery isolation control is achieved through the
use of either a battery circuit-breaker undervoltage coil or through an automatic contactor inside the
UPS.

Battery Installation

17

2.2 Safety

Special care should be taken when working with the batteries associated with the Liebert NX UPS
system. When all the cells are connected together, the battery terminal voltage is potentially hazard­ous. The battery installation must be segregated from all but appropriately qualified maintenance
personnel by locating the cells in a key-lockable cabinet or in a purpose-designed, dedicated battery

room.

!

Battery Installation

NOTE

Full safety instructions concerning the use and maintenance of UPS batteries are provided in
the appropriate battery manufacturers manuals. The battery safety information contained in
this section relates to key considerations that must be taken into account during the
installation design process and might affect the design outcome depending on localised
conditions.

WARNING

Hazardous battery voltage present behind covers

No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.

When using internal batteries in 30 and 40kVA units, the batteries are always connected
through power fuses to the UPS and to the segregated terminal bars available for connection
to an external battery.

Isolate any internal battery connections before attempting to access the segregated terminal
bars available for connection to an external battery.

The following general battery safety precautions and warnings should be observed at all
times:

• A battery can present risk of electric shock or burn from high- short-circuit currents.

• The full nominal string voltage, when the battery blocks are interconnected, is 480VDC,
which is hazardous

• Only qualified personnel should install or service batteries.

• Eye protection should be worn to prevent injury from electrical arcs.

• Remove rings, watches, necklaces, bracelets and all other metal objects.

• Use only tools with insulated handles.

• Wear rubber gloves and a rubber apron when handling batteries.

• If a battery leaks electrolyte or is otherwise damaged, it should be placed in a container
resistant to sulfuric acid and disposed of in accordance with local regulations.

• If electrolyte comes into contact with the skin the affected area should be washed immedi­ately with plenty of clean water.

• Batteries must always be disposed of according to local environmental laws.

• When replacing batteries, use the same number and type that were originally fitted.

• Disconnect charging source before connecting or disconnecting battery terminals.

• Determine whether the battery is inadvertently grounded. If it is inadvertently grounded,

remove the source of the ground. Contact with any part of a grounded battery can result in
electrical shock.

2.3 Battery Cabinet

2.3.1 Introduction

This cabinet can also be used in conjunction additional cabinets, to provide the necessary accommoda­tion required by the larger cells associated with system’s having a long autonomy time.

Where two (or more) cabinets are used they are positioned alongside each other and secured and
bonded together. If the cabinet(s) is located immediately adjacent to the main UPS equipment the two
units are bolted together.

18

2.3.2 Temperature Considerations

Valve-regulated, lead acid battery cells are sensitive to ambient temperature and should be operated
between 15°C and 25°C (59-77°F). Battery capacity is increased by 1% for every 1°C (2°F) increase in
temperature up to 25°C (77°F). Battery life is reduced at temperatures above 25°C (77°F).

When batteries are mounted in the same room as the UPS unit, it is the battery that dictates the
designed maximum ambient temperature, not the UPS. — i.e. in the case of valve-regulated cells, the
ambient room temperature should be kept between 15°C and 25°C (59-77°F), and not between 0°C
and 40°C (32-104°F) (which is the specified main equipment operating temperature range). Tempera­ture deviations are permissible for short periods, provided the average temperature does not exceed
25°C (77°F).

2.3.3 Dimensions

The external dimensions are shown in Table 8. These are the same height and depth as the UPS
module and provide a matching appearance when bolted together. All cabinets are fitted with doors,
which must be fully opened in order to fit or remove the batteries. The door swing must therefore be
taken into consideration when planning the positioning of the cabinets.

2.3.4 Weight

The unladen weight is shown below in Table 8. When designing the battery installation the weight of
the batteries and cables must be added to the unladen weight. This is particularly important when
placing the NX on a raised floor.

Table 8 Dimensions and weight

Rated Service

Model UPS Ratings

30kVA

Narrow

Cabinet

Wide

Cabinet

Large

Cabinet

40kVA
60kVA
80kVA

30kVA
40kVA
60kVA
80kVA

100kVA
120kVA
140kVA
160kVA
200kVA

Current (In)

125A
200A

125A
200A

400A
500A

Rated

Uninterrupted

Current (IU)

160A
250A

160A
250A

400A
500A

External Cabinet

WxDxH, mm (in)

828x825x1600
(32.6x32.4x63)

1490x825x1600

(58.7x32.4x63)

1490x825x1800

(58.7x32.4x76.9)

Battery Installation

Cabinet Weight

Without Batteries,

kg (lb)

200 (441)

270 (595)

305 (672)

2.3.5 Circuit Breaker Features

In 30 to 40kVA models fitted with internal battery and in all models fitted with a Battery Start kit,
the UPS is fitted with an internal contactor for automatic connection and disconnection of the batter­ies. External battery banks connected to such models generally are protected by a standard battery
circuit breaker (with status contacts and without undervoltage trip coil). Refer to 2.5 - Battery Con-
trol for details.

When no internal contactor for automatic disconnection is installed in the UPS module, the external
battery disconnection is performed by fitting a Circuit Breaker Controller Board and an undervoltage
coil to the battery circuit breaker.

The circuit breaker can then be manually closed once the DC busbar is above the ‘low battery; trip
voltage. Once closed, the circuit breaker can be opened manually at any time and is tripped automat­ically by the UPS module following certain fault occurrences, an emergency power off command or if
low/high DC busbar voltage is detected. Refer to 2.5 - Battery Control for details.

19

2.3.6 Moving the Battery Cabinets

WARNING

!

Ensure that the weight is within the designated surface weight loading of any handling equipment.
See Table 8 for weight details.

Battery cabinets can be handled by means of a fork lift or similar equipment.

Ensure any lifting equipment used in moving the cabinet has sufficient lifting capacity.

NOTE

Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum.

When the equipment has been finally positioned ensure the adjustable feet are set so that the
battery cabinet will remain stationary and stable.

2.3.7 Cable Entry

Cables enter the battery cabinet from either the top or the bottom. Cable entry is made possible by
removing a blanking piece fitted at the bottom to reveal the cable entry hole.

Battery Installation

20

2.3.8 General Arrangement Drawings

Refer to Figures 6 through 10 for general arrangement of battery cabinet models.

Figure 6 Narrow battery cabinet with top and bottom cable entry locations

Battery Installation

1600

828

FRONT VIEW

566,5

FRONT VIEW

Door Open

825

SIDE VIEW

5563055

55

TOP
VIEW

660 55

96,5

250

100

BOTTOM
VIEW

BACK VIEW

21

Figure 7 Narrow battery cabinet with top cable entry location

Top

Top

Cable Entry

100x250 mm

(3.9x9.8")

225

(8.8")

Front

96,5

(3.8")

Battery Installation

Front

Front

22

Figure 8 Wide battery cabinet with top and bottom cable entry locations

1600

Battery Installation

825

Side View Side View

100

603

70

603

100

Front View

1490

Top View

55

630

23

55

55

1321

Bottom View

55

Figure 9 Wide battery cabinet with bottom cable entry location

265

152

150

Battery Installation

150

270

270

Bottom View

Front View

24

Figure 10 Wide battery cabinet with fuse or optional circuit breaker locations

Battery Installation

Bottom Cable entry

Top Cable
entry

Adjustable

Fixing Feet

Output
busbar
connections

Battery
Circuit Breaker

BCB
controller board

Fuses
(alternative
to BCB)

25

Figure 11 Large battery cabinet dimensions

Top View

Battery Installation

552

180

116

300 660 300 116

Front

1800

825

Side

55

55

55 630

130

1488

270 691

660.5 660.5 55

270

Bottom View

26

130

150

567

Figure 12 Large battery cabinet with fuse or optional circuit breaker location s

Battery Installation

Fuses
(alternative
to BCB)

Output
busbar
connections

Battery
Circuit Breaker

BCB
controller board

27

Figure 13 SENXA0NBCN4LCB.eps

Battery Installation

W001

W001

W001

W001

W002

W001

W001

W002

W002

W001

W001

W002

W001 W001

W001W001

BCB

SPACE

W002

W001

W001

Tray in Layer 3

Tray in Layer 4

W001 W001

W001

W001

W001

W001

W001

W001

W002

W001

W001

W001 W001

Tray in Layer 1 Tray in Layer 2

W001 W001

W001W001

W001

W001

BCB(125/200A)

W102

W101

RED

BLACK

N

V<

P

N.O.

TO UPS

FRONT VIEW

W301

X102-1

X102-2

W302

X101-1

X101-3

X100-2

X100-1

X100-4

X100-3

X102-3

X102-4

Layer 4

BCB Control board

X108-1

TO UPS

X108-3

X108-2

X106-3

X106-2

X106-1

X105-3

X105-2

X105-1

X104-3

X104-2

X104-1

X103-3

X103-2

X103-1

Layer 3

Layer 2

Layer 1

J1

Temp. channels reserved for Batt. cabinet Paralleling

BLUE

RED

GREEN

GREEN

GND

BLUE

OUT

P12

Temp. transport

RED

NOTE:

1. Please refer to BCB BOX user instructions for cable connection.

3. Used for: NPX-100; UH12V140/A; UH12V200/A; UPS12-100; UPS12-140; UPS12-170; UPS12-200.

2. If no internal Control board used, temp. transport cables should be connected

directly to external BCB control board. Meanwhile, the undervoltage release function

for the internal BCB is not needed.

28

Figure 14 SENXA0NBCN4LF

Battery Installation

W002

W001

W001

W001W001

Tray in Layer 3

Tray in Layer 4

W001

W001

W001

W002

W001

W001

W001

W001

W001

W001

W001

W001

Tray in Layer 1 Tray in Layer 2

W001

W001

W001

W001

W001

W001

W001

W001

W001

W002

W002

W002

W002

W001

W001

W001

W001

W001

W001

W001

W001

W003

BCB

SPACE

FRONT VIEW

Layer 4

Layer 3

Layer 2

Layer 1

(Anderson connector)
PP120/180-BLACK

W006 W005

(Bussmann Fuses)
FWP-120A/200A

W004

TO BCB BOX

TO BCB BOX

GREEN

J1

BLUE

GND

OUT

P12

Temp. transport

RED

(Anderson connector)
PP120/180-RED

29

2. Used for: NPX-100; UH12V140/A; UH12V200/A; UPS12-100; UPS12-140; UPS12-170;

1. When fuses are used for overcurrent protection, the temp.signals shall go

directly to the control board in external BCB BOX.

NOTE:

UPS12-200.

Figure 15 SENXA0NBCN5LCB

Battery Installation

W001

W001

W001

W001

W002

W002

W002

W002

W001

W001

W001

W001

W001

W002

W001

Tray in Layer 3

W001 W001

W001

W001

W001

W001

W001

W002

W002

W002

W001

W001

W001

W001

Tray in Layer 2

Tray in Layer 1

W001 W001

W001 W001

Tray in Layer 5 Tray in Layer 4

W001 W001

BCB(125/200A)

W001

W001

W101

W001

W001

N.O.

V<

BCB

SPACE

FRONT VIEW

X108-3

X108-2

Layer 4

X106-3

X106-2

X106-1

X105-3

X105-2

X105-1

X104-3

X104-2

X104-1

X103-3

X103-2

X103-1

BLUE

RED

Layer 5

W102

W301

X102-1

X102-2

X101-1

X101-3

X100-2

X100-1

X100-4

X100-3

X102-3

X102-4

BCB Control board

X108-1

RED

BLACK

N

P

GREEN

Temp. channels reserved for Batt. cabinet Paralleling

Layer 3

GREEN

Layer 2

J1

GND

BLUE

OUT

P12

Temp. transport

RED

Layer 1

TO UPS

30

W302

TO UPS

NOTE:

2. If no internal Control board used, temp. transport cables should be connected directly

to external BCB control board. Meanwhile, the undervoltage release function for the

internal BCB is not needed.

1. Please refer to BCB BOX user instructions for cable connection.

Figure 16 SENXA0NBCN5LF

Battery Installation

W001

W001

W001

W001

W002

W002

W002

W002

W001

W001

W001

W001

W001

W002

W001

Tray in Layer 3

W001

W001

W001

W001

W001

W001

W001

W002

W002

W002

W001

W001

W001

W001

Tray in Layer 2

Tray in Layer 1

W001W001

W001

W001

BCB

SPACE

W001

Tray in Layer 5 Tray in Layer 4

W001

W001

W001

W001

W001

FRONT VIEW

Layer 5

Layer 4

Layer 3

Layer 2

Layer 1

(Anderson connector)

W005

W003

PP120/180-BLACK

W006

W004

(Bussmann Fuses)
FWP-120A/200A

TO BCB BOX

TO BCB BOX

GREEN

J1

BLUE

GND

OUT

P12

Temp. transport

RED

(Anderson connector)
PP120/180-RED

31

NOTE:

1. When fuses are used for overcurrent protection, the temp.signals shall go directly to the

control board in external BCB BOX.

2. Used for: UH12V100/A; NPX-150; NPL24-12,38-12; S512/38; 12XLB150; P12V570,875; L12V32.

Figure 17 SENXA0NBCWXX3LCB

Battery Installation

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001 W001

W001

W001

W001 W001

W001 W001

W001

W001

W002

W002

W001

W001

W001

W001

Tray in Layer 1

W001

W001

W001

W001

W001

W001

Tray in Layer 3

W001

BCB(125/200A)

W001

TO UPS

W001

N.O.

V<

N

P

W001

W102

W101

RED

W301

BLACK

X102-1

X102-2

W302

X101-1

X101-3

X100-2

X100-1

X100-4

X100-3

X102-3

X102-4

Tray in Layer 2

BCB Control board

X108-1

X108-2

TO UPS

W001

X108-3

X106-3

X106-2

X106-1

X105-3

X105-2

X105-1

X104-3

X104-2

X104-1

X103-3

X103-2

X103-1

RED

BLUE

W001

Temp. channels reserved for Batt. cabinet Paralleling

GREEN

GREEN

W002

W001 W001

W002

3. Used for: A412/32 G6.

2. If no internal Control board used, temp. transport cables should be

connected directly to external BCB control board. Meanwhile, the

undervoltage release function for the internal BCB is not needed.

1. Please refer to BCB BOX user instructions for cable connection.

NOTE:

BCB

SPACE

J1

GND

BLUE

OUT

RED

P12

Temp. transport

Layer 3

Tray master

Layer 2

Tray master

FRONT VIEW

Layer 1

Tray master

32

Figure 18 SENXA0NBCWXX3LF

Battery Installation

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

Tray in Layer 1

W001

W001

W001

W001

W001 W001

W001

W001

W001 W001

W001 W001

W002

W002

W001

W001

W001

W001 W001

W002

W002

Meanwhile, the undervoltage release function for the internal

BCB is not needed.

3. Used for: A412/32 G6.

2. If no internal Control board used, temp. transport cables

should be connected directly to external BCB control board.

1. Please refer to BCB BOX user instructions for cable connection.

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

Tray in Layer 2

W102

W101

W001

W001

W001

Tray in Layer 3

W001

W001

W001

NOTE:

BCB

SPACE

(Anderson connector)

W003

W005

W004

W006

PP120/180-BLACK

(Bussmann Fuses)
FWP-120A/200A

TO BCB BOX

TO BCB BOX

BLUE

GREEN

RED

J1

GND

OUT

P12

Temp. transport

Layer 3

Tray master

Layer 2

Tray master

FRONT VIEW

Layer 1

Tray master

(Anderson connector)
PP120/180-RED

33

Figure 19 SENXA0NBCWXX4LCB_2x4

Battery Installation

W001

Tray slaveTray master

BCB

W001

W001

W001

W001 W001

SPACE

W002

W004

W001

W001

Tray in Layer 3

W001

Tray slave

W004

W003

W002

Tray slaveTray master

W001

Tray in Layer 1

W001

W001

Tray slaveTray master

W001

W001

W001

W001

W001

W001

W003

W004

W003

W001 W001

W001

W002

Tray in Layer 4

W001

Tray master

W001 W001

BCB(125/200A)

W001

W001

N.O.

V<

BCB

Layer 4

SPACE

W004

Tray master

Layer 3

1. Please refer to BCB BOX user instructions for cable connection.

NOTE:

Tray master

connected directly to external BCB control board. Meanwhile, the

3. Used for: UH12V270/A,310/A,370/A,500/A; UPS12-270,310,370,475;

undervoltage release function for the internal BCB is not needed.

Layer 1

Tray slave

Layer 1

Tray master

2. If no internal Control board used, temp. transport cables should be

Layer 2

Tray slave

Layer 2

Tray master

A412/50,65 G6; NPL65-12; NPL78-12; NPL100-12; 1290S.

FRONT VIEW

Tray in Layer 2

W001 W001

W101

W102

J1

BLUE

GND

OUT

P12

Temp. transport

RED

X106-3

X106-2

X106-1

X105-3

X105-2

X105-1

X104-3

X104-2

X104-1

X103-3

X103-2

X103-1

RED

W001

Temp. channels reserved for Batt. cabinet Paralleling

BLUE

GREEN

GREEN

W001

W301

RED

BLACK

N

P

X102-1

X102-2

X101-1

X101-3

X100-2

X100-1

X100-4

X100-3

X102-3

X102-4

BCB Control board

X108-1

X108-2

X108-3

TO UPS

W302

TO UPS

34

Figure 20 SENXA0NBCWXX4LCB_4x2

Battery Installation

W001

Tray s laveTray master

W001

W001

Tray in Layer 3

Tray in Layer 4

W002

Tray master Tray slave

W001

W001

W001

W001

W002

BCB

SPACE

W002

W002

W001

W001

W001

W001

W001

W001

W002

Tray in Layer 1

Tray in Layer 2

W003

Tray master Tray slave

Tray s lave

Tray master

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W002

W002

W002

W002

BCB(125/200A)

W101

W102

X106-3

X106-2

X106-1

W301

BLACK

RED

N

V<

P

N.O.

X102-1

X102-2

W302

X101-1

X101-3

X100-2

X100-1

X100-4

X100-3

X102-3

X102-4

TO UPS

BCB Control board

X108-1

TO UPS

X108-3

X108-2

X105-3

X105-2

X105-1

X104-3

X104-2

X104-1

X103-3

X103-2

X103-1

RED

BCB

SPACE

J1

Temp. channels reserved for Batt. cabinet Paralleling

BLUE

RED

P12

GND

OUT

Temp. transport

Layer 4

Tray master

BLUE

GREEN

GREEN

Layer 3

NOTES:

1. Please refer to BCB BOX user instructions for cable connection.

2. If no internal Control board used, temp. transport cables should be connected directly

to external BCB control board. Meanwhile, the undervoltage release function for the internal BCB is not needed.

3. Used for: A412/85 F10.

Layer 1

Layer 2

Tray slave

Tray slave

FRONT VIEW

Layer 1

Layer 2

Tray master

Tray master

Tray master

35

Figure 21 SENXA0NBCWXX4LF_2x4

Battery Installation

W001

W003

W001

Tray in Layer 3

Tray master Tray slave

W001

Tray slave

W001

W001W001

BCB

W001

W001W001

Tray in Layer 1

W002

SPACE

W001

W002

W004

W004

W001W001

Tray master Tray slave

W001

W001

W001

W001

W001

W001

W003

W001W001

W004

W003

W001

W002

W001

BCB

Layer 4

W004

NOTES:

1. Please refer to BCB BOX user instructions for cable connection.

2. If no internal Control board used, temp. transport cables should be connected

directly to external BCB control board. Meanwhile, the undervoltage release

function for the internal BCB is not needed.

3. Used for: UH12V270/A,310/A,370/A,500/A; UPS12-270,310,370,475; A412/50,65 G6;

NPL65-12; NPL78-12; NPL100-12; 1290S.

SPACE

Layer 2

Layer 1

Tray slave

Tray slave

FRONT VIEW

Layer 3

Tray master

Layer 2

Tray master

Layer 1

Tray master

Tray master

Tray in Layer 4

W001

Tray master

W001

W001

W001

Tray in Layer 2

Tray master Tray slave

W001 W001

W001

W001

W101

W102

(Anderson connector)

W003

W005

W004

PP120/180-BLACK

W006

(Bussmann Fuses)
FWP-120A/200A

TO BCB BOX

TO BCB BOX

GREEN

J1

BLUE

RED

GND

OUT

P12

Temp. transport

(Anderson connector)
PP120/180-RED

36

Figure 22 SENXA0NBCWXX4LF_4x2

Battery Installation

W001

Tray s laveTray master

W001

W001

Tray in Layer 3

Tray in Layer 4

W002

Tray master Tray slave

W001

W001

W001

W001

W002

BCB

SPACE

W002

W002

W001

W001

W001

W001

W001

W001

W002

Tray in Layer 1

Tray master Tray slave

Tray s lave

Tray in Layer 2

Tray master

W001

W003

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W001

W002

W002

W002

W002

W005

W003

W101

W102

(Anderson connector)
PP120/180-BLACK

W006

W004

(Anderson connector)
PP120/180-RED

(Bussmann Fuses)
FWP-120A/200A

TO BCB BOX

TO BCB BOX

37

GREEN

NOTES:

1. Please refer to BCB BOX user instructions for cable connection.

2. If no internal Control board used, temp. transport cables should be connected

directly to external BCB control board. Meanwhile, the undervoltage release

function for the internal BCB is not needed.

3. Used for: A412/85 F10.

BCB

SPACE

Layer 2

Layer 1

Tray slave

Tray slave

J1

BLUE

GND

RED

OUT

P12

Temp. transport

Layer 4

Tray master

Layer 3

Layer 2

Tray master

Tray master

FRONT VIEW

Layer 1

Tray master

2.4 Battery Power Cables

2.4.1 Connection Principles

The following notes, in conjunction with the diagrams, illustrate the broad principles to be followed
when fitting and connecting the majority of battery installations.

2.4.2 Fitting the Batteries

1. In general, at least 10mm (3/8") must be left unobstructed on all vertical sides of the battery
blocks to permit free air movement around the cells.

2. Clearance should be allowed between the top of the cells and the underside of the shelf above (this
is necessary for monitoring and servicing the cells).

3. When installing the batteries on racks always work from the bottom shelf upwards to prevent
raising the centre of gravity.

2.4.3 Connecting the Battery

1. When the battery cabinet is installed on a raised floor the battery power cables and optional
circuit breaker control cables can be routed to the UPS cabinet via the floor of the cabinet. If the
UPS and battery cabinet are located adjacent to each other and located on a solid floor these
cables can be passed between the cabinets via the lifting apertures located in the lower sides of
the cabinets.

2. In general it is recommended that the inter-connecting cables be fitted to the batteries within
their particular level before fitting the inter-level connecting cables, followed finally by the cables
to the circuit breaker.

3. An insulating shroud should be fitted to each terminal after its connection has been made.

4. When connecting the cables between the battery string ends to the optional circuit breaker always
connect the circuit breaker end of the cable first.

Battery Installation

2.4.4 Battery Room Design

Whatever the type of mounting system selected, the following conditions should be noted:

• Cell Layout—1
Whichever battery mounting system is used, the batteries should be arranged to prevent the pos-

sibility of simultaneous contact with two exposed live parts having a potential greater an 150V.
Where this is not possible, insulated terminal shields must be installed and insulated cables must
be used for connections.

• Service Platform—2
The service platform (or duckboard) must be slip-proof, insulated from the floor and at least one

metre (39 in.) wide.

• Connections—3
All connections must be as short as possible.

• Battery Protection Fuses/Circuit Breaker—4

The battery circuit breaker is generally installed at the front of the battery room. See 2.5 - Bat-
tery Control for details on connecting the circuit breaker box available for the Liebert NX.

Figure 23 Battery room design

4

1

3

2

38

2.5 Battery Control

The battery circuit breaker is controlled by the battery circuit breaker controller board, which is
located within the battery cabinet or adjacent to the battery circuit breaker when the batteries are
rack-mounted. This board controls the circuit breaker's undervolt release coil and also provides a path
for the circuit breaker auxiliary contacts to signal the circuit breaker status back to the UPS control
logic. Refer to Figure 25. All connections between the controller board and the UPS unit are made
via auxiliary terminal Block X3 BCB of the Monitor Board, which is located at the rear of the door in
the UPS Cabinet (refer to 1.8.3 - External Circuit-Breaker Interface).

Battery temperature sensor cables are connected between UPS auxiliary terminal block X3 BCB, the
Battery Circuit Breaker controller board and the battery as shown in Figures 25 and 26.

Battery Installation

Cables connected to X3 BCB must contain a protective earth wire or a shield, be segregated from
power circuits, double insulated and of a typical 0.5 to 1mm
between 25 and 50 meters respectively. The shield should be connected to the protective earth of the
battery cabinet or battery breaker, not at the UPS

CAUTION

!

UPS containing an internal automatic battery contactor do not require BCB board, nor
undervoltage control of the BCB.

In this case, direct wiring to the NX Monitor Board is required:

• the auxiliary NO contact of the battery circuit breaker is wired directly to the NX monitor
board terminal X3 BCB: 2-3.

• “On-Line” X3 BCB terminals 4-3 of the NX monitor board are linked.

• Any temperature sensor is wired directly to the NX monitor board terminal X7:
2(+12V),3(signal),4(GND).

For details, refer to 1.7 - Control Cables and Communication

The above applies to:

• 30 to 40kVA models with internal battery

• - any model with the Battery Start option

• The commissioning engineer must program the UPS accordingly (e.g., enable or disable bat­tery temperature compensation, enable internal battery contactor).

2

cross-section area for maximum runs

39

2.6 Battery Circuit Breaker Box

The box contains a battery isolating circuit breaker and the circuit breaker controller board as also
mounted in the battery cabinet.

A range of battery circuit breaker boxes is available for use in installations where the battery is not
installed in the battery cabinet, in which case the appropriate battery box is fitted as close as possible
to the battery and connected to the UPS equipment as illustrated in Figure 25.

The battery circuit breaker box, used with the circuit breaker controller board, is required to protect
the battery from deep discharging and overcurrents. It also provides electrical isolation between the
UPS and the battery, permitting technical service personnel to reduce the risks involved in mainte­nance work to a minimum. Inside the box are connection bars for power cables arriving from the UPS
and from the battery.

NOTE

The control cables from the UPS unit to the controller board must be made using a 5-core
shielded cable located in a separate conduit to that containing the battery power cables.

The control signal cable is connected to the circuit breaker controller board through the terminal
board.

The cable shield must be earthed to prevent induced noise affecting the control operation, and a sepa­rate safety earth must be connected between the UPS unit and circuit breaker box.

The configurations in Table 9 are available, depending on the UPS power rating.

Table 9 UPS-circuit breaker configurations

Dimensions

UPS

30 to 40 kVA
60 to 80 kVA 200A 4p
100 to 120 kVA 25 (55) 400A 4p
140 to 160kVA 825x530x195
200kVA 32 (71) 500A 4p

Listed weights do not include packaging.

HxWxD, mm (in)

558x378x180

(22x14.9x7)

(32.4x21x7.7)

Weight

kg (lb) Circuit Breaker

21.5 (47.4)

30 (66) 400A 4p

125A 4p

Battery Installation

The BCB box contains a battery isolating circuit breaker and a circuit breaker controller board and
offers the following features:

• Short-circuit and End Of Discharge protection—The circuit-breaker (or internal UPS battery con­tactor when fitted) automatically opens when the EOD voltage is reached

• UPS Emergency Stop compatibility—The circuit-breaker (or internal UPS battery contactor when
fitted) opens when the emergency stop button is pressed on the UPS front panel.

NOTE

30 to 40kVA UPS models fitted with internal battery and any UPS models fitted with a Battery
Start kit contain an internal UPS battery contactor for automatic connection and
disconnection of the batteries and the battery circuit breaker undervoltage coil is not used.
Refer to 2.5 - Battery Control for details

40

Figure 24 Battery circuit breaker box—30-120kVA and 140-200kVA

6

Battery Installation

9

9

4

2

1

6

3

7

140-200kVA

Circuit Breaker Box

30-120kVA

Circuit Breaker Box

8

10

5

Table 10 Battery circuit breaker box legend

Key #

1 Battery connections, positive and negative
2 Connections from UPS, positive and negative
3 Battery circuit breaker controller board
4 Battery circuit breaker
5 Plate for cabling holes (User to size and cut holes for the cables to be used)
6 Wall mounting holes
7 Earth bar
8 Insulating cover
9 Top plate

10 Hinged door

Component

Standard cable entry is from bottom side. The baseplate can be rotated to permit top cable entry.

41

Figure 25 Battery circuit breaker box connection

+
N

-

Temp

Sensor

TMP-2

Battery Installation

NC

12V
OUT
GND

W3

UPS

UHW241U2

J10

Battery

X7

OL

GND

FB

DRV

W2

BCB

+

UV

220VDC

-

Auxiliary

Contactor

+12V

BAT-T

GND

W3

UPS +

UPS -

Battery

+

Black

Red

Battery

-

Black

Red

X100

OUT-P
OUT-N
AUX1
AUX2

UHW241C2

X101

X108 X102

+12V
BAT-T
GND2

USE

GND1

AUX
DRV

NOTES

1. Cable W3 supplied with temperature sensor (5m) and with BCB Box (30m)

2. Cable W2 supplied with BCB Box (30m)

3. X102 labels are 1(DRV), 2(AUX), 3(GND1), 4(USE) - refer to Table 11 for full X102 label
descriptions

4. X101 - HAZARDOUS VOLTAGE - do not connect to battery bus before authorised by the
commissioning engineer

5. X103-X106 are for connecting temperature sensors from multiple battery cabinets.

X103

X104
X105
X106

42

Battery Installation

Table 11 Battery control label description (X102)

BCBB
X-102
Ref Label

1 DRV

2 IN (AUX) FB (IN)

4 USE

3 GND1 GND GND1 GND1 to GND on U2 board

5 (1) +12V

6 (3) 0V GND2 GND2 GND2 to GND on U2 board
7 (2) Out OUT

1. Cables connected to X3 BCB must be segregated from power circuits, double insulated and of a typical 0.5 to 1mm2 cross
section area for maximum runs between 25 and 50 meters respectively.

2. Battery temperature sensing cables must be less than 10 m long.

3. 30 and 40kVA UPS models fitted with internal battery and any UPS models fitted with Battery Start kit contain an internal UPS
battery contactor for automatic connection and disconnection of the batteries and the battery circuit breaker undervoltage coil is
not used. Refer to 2.5 - Battery Control for details.

BCB-X3
on U2 Monitor
board

X7
on U2 Monitor
board

Monitor Bd
Reference
Label Description Signal status

DRV

OL =
On Line

P12

Battery circuit breaker tripping
control signal from UPS

Bat CB auxiliary status contact
(Open contact = CB open)

Bat CB Board status signal
(GND = OV from BCB Bd)

+12V Power supply from
Monitor Bd to Temp Monitoring
Probe & Buffer

Buffered Bat temp Probe signal
from BCB Bd to Monitor Bd

Normal: H level voltage, BCB can close
Abnormal: L level voltage, BCB trips

Normal: OV when BCB is closed.
Abnormal: open when BCB is open

Normal: 0V, the BCB Board is in use.
Abnormal:. open, the BCB Board is not
in use.

Power available: 3W.

CAUTION

!

Leave terminals open if the corresponding facility is not used. The commissioning engineer
must program the UPS accordingly (e.g., disable battery temperature compensation, enable
internal battery contactor)

2.6.1 Battery Temperature Sensor—Optional

The optional external battery temperature sensor kit, supplied separately from the battery circuit
breaker, contains one probe and one temperature transport board as illustrated in Figure 26. It is
connected to the UPS Monitor Board (either directly or in case of multiple sensors, through the bat­tery circuit breaker board - see Figures 26 and 27).

Figure 26 Single temperature sensor and monitor board—U2

Temperature

Sensor

+

IN

-

NC

12V

OUT

GND

TMP-2

Name: W2 L = 30m

X7

Monitor

Board

– U2

-12V

BAT-T

GND

UPS

Cable W2 is packed with the temperature sensor.

43

Figure 27 Multiple temperature sensors, battery circuit br eaker box and UPS module

Type: W3 L = 5m Type: W3 L = 30m

Temperature

Sensor

Battery Installation

+

IN

­TMP-2

Temperature

+

IN

-

Temperature

+

IN

-

Temperature

Sensor

TMP-2

Sensor

TMP-2

Sensor

NC

12V
OUT
GND

NC

12V
OUT
GND

NC

12V
OUT
GND

X103

X104

X105

BCB Control

Board – C2

+12V

OUT

GND

X108

X7

Monitor

Board

– U2

-12V

BAT-T

GND

UPS

X106

BCB Box

IN

+

­TMP-2

NC

12V
OUT
GND

Cable W3 (L=5m) is packed with the temperature sensor.
Cable W3 (L=30m) is packed with the BCB box.

NOTE:

1. Each probe consists one OT6-4 terminal and one precision temperature sensor that is
sealed in the OT6-4's terminal. The whole probe is supplied as one cable.

2. The type of temperature transport board illustrated in Figure 27 is TMP-2.

3. The signal cables in the Figure 27 must be shielded and double insulated.

4. The temperature monitoring cable must be less than 10m while the signal transmission
distance of the transport board must be less than 100m.

44

3.0 UPS MULTI-MODULE INSTALLATION

3.1 General

The installation of a multi-module UPS configuration must follow the installation procedure for a sin­gle UPS module with the additional requirements detailed in this chapter.

In addition to the local EPO push button on the front panel of the UPS module (that stops operation of
that module), the UPS supports also a remote emergency stop to permit simultaneous multi-module
shutdown.

NOTES

1. The remote emergency power off switch must be voltage-free and Normally Open or

Normally Closed.

2. The open voltage supplied is 12VDC, < 20mA

3. This external emergency stop may be supplied with a second set of contacts that can be used

to trip incoming mains or bypass supply circuit breakers supplied by others and fitted with
remote trip units.

4. Normally Closed EPO - X2: 1&2, these terminals are supplied factory-linked on the monitor

board.

Figure 28 Emergency power off connections

UPS Multi-Module Installation

EPO

EPO

X2:3

X2:4

UPS1

X2:1
X2:2

UPS1

X2:3
X2:4

Monitor Board

X2:1
X2:2

Moni tor Board

UPS2

Moni tor Board

UPS2

Moni tor Board

45

UPS Multi-Module Installation

3.2 Paralleled UPS Modules

The basic installation procedure of a parallel system comprising two or more UPS modules is the
same as that of single module system. The following sections only introduce the installation proce­dures specific to the parallel system.

3.2.1 Cabinet Installation

Place the UPS modules side by side and interconnect as shown in Figure 29. The distribution panel
(external bypass cabinet) is optional but recommended for ease of maintenance and system testing.

Figure 29 Typical 1+N system block diagram with common input supply, with separate batteries and

optional output / bypass distribution panel

Supplied

by Ot he r s

Input M a i ns

Supply L1, L2, L3, N

UPS1

Charger

Input M ai ns

Supply L1, L2, L3, N

Q1

Q1

UPS2

Rectifier

Rectifier

Charger

Inverter

Inverter

Q2

Q3

Q5

Q5

L1 , L2, L3 , NL1, L2, L3, N

Q1EXT Q2EXT

Q2

Q3

QUPS

QBYP

Dist ribution Cabinet

To Load

NOTE

Internal maintenance bypass switch Q3 must be removed when the load exceeds the capacity of
one UPS module.

46

Figure 30 Dry contact s, multiple UPS modules with distribution panel

Input Distribution

UPS Multi-Module Installation

UPS 1

M3 Board

X3

Ext. Maint. Ext. Out

QUPS

UPS 2

M3 Board

X3

Ext. Maint. Ext. Out

Q1Ext Q2Ext QnExt

UPS N

M3 Board

X3

Ext. Maint. Ext. Out

QByp

To Load

3.2.2 External Protective Devices

Refer to the instructions in 1.0 - Single Module UPS Installation.

3.2.3 Power Cables

The wiring of power cables is similar to that of single module system. The Bypass and the Main input
sources must be referenced to the same neutral potential and input earth leakage monitoring devices,
if installed, must be located upstream of the common neutral sinking point. Refer to the instructions
in 1.0 - Single Module UPS Installation.

NOTE

The length and specification of power cables including the bypass input cables and UPS output
cables should be the same. This facilitates load sharing when operating in bypass mode.

47

3.2.4 Control Cables Intermodule Control

Shielded and double insulated control cables available in lengths of up to 30 meters must be intercon­nected in a ring configuration between UPS modules as shown below. The parallel control board is
mounted on the top, behind protective cover of each UPS module (refer to Figure 44). The ring config­uration ensures high reliability of the control (refer to Figure 31).

Figure 31 Connection of 1+N system parallel control cables

UPS Multi-Module Installation

1 2 3 4 5 6

Paralle l Board

X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

Parallel Board

X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

3.3 Hot-Standby UPS Modules

3.3.1 Cabinet Installation

Place the UPS modules side by side and interconnect as shown below.

The hot standby mode comprises two series-connected UPS modules of the same rating. One module
is designated as the hot standby master (downstream), and the other module is designated as the hot
standby slave (upstream). Their roles are determined by power connection and configuration soft­ware. In normal operation, both slave and master operate in normal mode and the output from one
upstream (slave) UPS feeds the bypass input to the other (downstream, master) UPS. The output of
the downstream (master) UPS is connected to the critical load and is always synchronised to the out­put of the upstream (slave) UPS. If the inverter of the UPS connected to the load fails, the inverter of
the upstream (slave) UPS supplies the load through the downstream (master) UPS bypass circuit.
The system can be programmed to cycle the downstream (master) UPS between normal mode and
bypass mode so that both UPS units are equally exercised.

Paralle l Board
X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

UPS

Parallel Board
X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

Parallel Board
X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

Paralle l Board

X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

NOTE

If it is a hot-standby system, the master must be turned on first.

3.3.2 External Protective Devices

Refer to the instructions in 1.0 - Single Module UPS Installation.

48

UPS Multi-Module Installation

3.3.3 Power Cables

The wiring of power cables is similar to that of single module system except that the output of the
upstream UPS is fed into the bypass input of the downstream UPS, and the load is fed by the down­stream UPS through its inverter or bypass. The bypass and the main input sources must be refer­enced to the same neutral potential and input earth leakage monitoring devices, if installed, must be
located upstream of the common neutral sinking point. Refer to the instructions in 1.0 - Single Mod-
ule UPS Installation.

No control wires other than those specified for the single module configuration are required.

Figure 32 Hot standby configuration

Input Distribution

Upstream Downstream

Mains L1,

L2, L3, N

Bypass L1,

L2, L3, N

Mains L1,

L2, L3, N

Bypass L1,

L2, L3, N

UPS1

Charger

Q1

Rectifier

Inverter

Q2

Q5

UPS1 O ut put

Q3

Q1

UPS2

Rectifier

Charger

Inverter

Q2

Q3

Q5

L1, L2, L3, NL1, L2, L3, N

49

UPS Multi-Module Installation

3.4 Dual Bus System

3.4.1 Cabinet Installation

The Dual Bus System consists of two independent UPS configurations each consisting of one or more
UPS modules. Dual Bus Systems are high availability configurations suitable for loads with multiple
input terminals. For single input loads an optional Static Transfer Switch may be added and the stan­dard Load Bus Synchroniser activated. Depending on the configuration, follow the appropriate instal­lation instructions for each system.

Place the UPS modules side by side and interconnect as shown below.

The objective of the Dual-bus Synchronizer (DBS) is to keep the output of two independent UPS sys­tems (or parallel systems) in synchronization. One system is designated as the master; the other is
designated as the slave. The operating modes covered comprise master and or slave operating
inverter or bypass mode.

Figure 33 Typical dual bus system configuration with static transfer switch and Load Bus Synch

Bypass Supply

Bypass Supply

Input

Rectifier

UPS1

CHARGER

Q5

UPS1

CHARGER

Input

Rectifier

Q1

Q5

RECTIFER

INVERTER

Q2

Q3

INTERMODULE

CONTROL CABLE

3.4.2 External Protective Devices

Q1

RECTIFER

INVERTER

UPS1

CHARGER

Input

Rectifier

Q1

Q5

RECTIFER

INVERTER

Q2

Q3

Input

Rectifier

Q1

UPS1

RECTIFER

CHARGER

Q2

Q3

LBS

Q5

INVERTER

Q2

Q3

INTERMODULE

CONTROL CABLE

STS

Load

Refer to the instructions supplied in 1.0 - Single Module UPS Installation.

3.4.3 Power Cables

The wiring of power cables is similar to that of single module system. The Bypass and the Main input
sources must be referenced to the same neutral potential and input earth leakage monitoring devices,
if installed, must be located upstream of the common neutral sinking point. Refer to the instructions
in 1.0 - Single Module UPS Installation

50

3.4.4 Control Wires

For Liebert NX to NX dual bus configuration, interconnect the optional DBS cable between any DBS
ports of two parallel systems as illustrated in Figure 34.

Figure 34 Connections of a typical dual bus system utilising Load Bus Synch

UPS Multi-Module Installation

Para llel Board

X3

P5

X2-2 X2-1

P2

X1-1 X1-2

P3

8

Parallel System I Parallel System II

X4

P4 P1

UPS

Para llel Board
X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

A

DBS Cable

Parallel Board

X3

P5

X2-2 X2-1

P2

X1-1 X1-2

P3

8

UPS

X4

P4 P1

Parallel Board

X3

P5

X4

X2-2 X2-1

P2

X1-1 X1-2

P4 P1

P3

B

NOTE

Example shown with ring control cables (“8”) for DSB applied to two 1+1 paralleled systems.

3.4.5 Extended Dual Bus Synchronization Option (DBS Interface Box)

For Liebert NX to non- NX (whether another Liebert UPS range or not) dual bus configuration, one
DBS interface box shall be mounted on the non- Liebert NX UPS and one on the Liebert NX UPS. In
this situation, the other UPS system is always treated as a master and the following conditions are
covered:

• Master and slave are both on inverter

• Master on bypass, slave on inverter

NOTE

Extended DBS interface box is also used for extending DBS cable length up to 150 metres for
DBS configuration between two groups of NX UPS systems.

51

4.0 EXTERNAL OPTIONAL CABINETS

4.1 External Maintenance Bypass Cabinets

The bypass cabinet enables maintenance operations and repairs to be performed in full isolation
while also allowing the disabling of each UPS without affecting the ordinary operation of the system
(depending on the redundancy level).

The optional maintenance bypass cabinet must be used in all configurations where one internal main­tenance bypass switch is insufficient to supply the full system load.

Each kVA rating has maintenance bypass cabinets sufficient to supply the full system load up to six
units in parallel power operation.

4.2 Interlock with UPS Module

Interlock the External Maintenance Bypass Switch with the operation of the UPS module(s) prevents
backfeed of the External Bypass AC power into the Inverter if an incorrect switching sequence is
used. A volt-free auxiliary status contact from external bypass switch QF3 is connected to UPS termi­nal X3 (MBC interface) of the parallel control board (M3).

Figure 35 External maintenance bypass cabinet with separate bypass input

400V, 50Hz

4W

4P

External Optional Cabinets

400V, 50Hz
3 or 4W

4P

S

Supplied
by Other s

400V, 50Hz

4W

Q1

UPS1

Q1

UPS2

Q1

CB

CB

X3

X1

X3

X1

Q2

Q2

Q2

Q3

Q3

Q3

Q5

Q5

Q5

4P

4P

4P

UPS3

CB

X3

X1

52

External Optional Cabinets

EXT-Maint X3-1&2 on UPS Parallel Board M3 (leave open if no external bypass switch is used). Pro­vides external maintenance bypass interlock protection for the UPS. Short circuit means external
bypass closed.

EXT-Out (X3-3&4) on UPS Parallel Board (leave shorted if no external output switch is used). Pro­vides external output interlock protection for paralleled UPS modules. Short circuit means external
output switch closed.

4.3 Isolation Tr ansformer Option

Isolation transformers are required in cases requiring galvanic isolation between the input supply
mains and the UPS.

These options are housed in cabinets and they are available for every range of UPS.
These optional cabinets provide the Top Cable entry function.

NOTE

Terminals and cabling for the battery connection is not a part of the MBP or TC cabinet.

Figure 36 Equipment arrangement—UPS, battery cabinet and top-entry Isolation Transformer Cabinet

TCE

TX

Figure 37 Single input external isolation transformer cabinet

UPS

FRONT

Is olation Trans former Cabinets

QF1

3P

T1

Bypass

Supply

N

Q1

Inp ut M ain s Supp ly

Supplied by

Others

UPS

BATTERY

cabinet

X3

Q2

Q3

Q5

To Lo ad

53

CB

X1

External Optional Cabinets

Maintenance

Figure 38 Dual input external isolation transformer cabinet

Bypas s S upply

QF2

Is olation Transformer Cabinet s

3P

QF1

Input

Supply

3P

N

Q1

Input Mains Supply

Supplied

by O thers

UPS

CB

X3

X1

Q2

Q3

Q5

To Load

Figure 39 Output external isolation transformer cabinet

by O thers

Supplied

Input Mains

Supply

Q1

UPS

Is olation Transformer Cabinets

Q2

X3

CB

X1

Q3

Q5

Tout

QF5

4P

To Load

4.4 Top Cable Entry Option

Optional Top Cable entry cabinets are available for every range of UPS.

54

5.0 INSTALLATION DRAWINGS

Figure 40 Electrical connections

Installation Drawings

UPS

POWER BUSBARS

CONNECTOR BARS THAT NEED TO BE REMOVED FOR DUAL INPUT SYSTEMS

Monitoring Board-U2

0V
12V

A-IN

+12V

+

ENV-T

­GND

+

-

ENV

BFP-O
BFP-S
BFP-C

INV-O
INV-S
INV-C

ACF-O
ACF-S
ACF-C

EPO-NC
EPO-NC
EPO-NO
EPO-NO

BCB-X3 X7

DRVFBOL

1

BtG
GEN
+12V

T_IT

AUX_I

+12V
GND

FUSE

F_FAN

T_OT

AUX_O

243 432

GND

+12V

2
3
4

2
3
4

2
3
4

1

2
3
4

1
2
3
4

1
2
3
4

1
2
3
4

1
2
3
4

GND

BAT-T

X5

X4

X1

X2

EXT EPO

PWR FOR
MODEM &

SNMP CARD

RS485-1
RS485-2

BFP

INV

ACF

EPO

ENV-T

IN DRY

MBC

BATTERY

EARTH

TO CUSTOMER SAFETY EARTH

W2

TO CRITICAL LOAD 380/415V 50HZ

V2
U2
N

W3

BYPASS SUPPLY 380/415V 50HZ

V3

POWER CABLES

U3
N

W1

INPUT SUPPLY
380/415V 50HZ

V1
U1

X6

X3

BCB BOX

+

BAT-P

BAT-N

-

BATTERY

P

TO

N

V<

N

P

N.O.

AUX-2

AUX-1

OUT-P

BAT-P

6
7
5
4
3
2
1

BAT-N

GND2
OUT
P12
GND1
ONLINE

IN

DRV

OUT-N

TO BATTERY

GND2

OUT

P12

4

GND

3

OUT

2

P12

(TMP-2)
BATTERY TEMPERATURE
TRANSPORT

55

Figure 41 General arrangement—30-40kVA UPS

Installation Drawings

825

1) Air inlet grille

2) Air outlet grille

3) Castors for manoevring

4) Adjustable fixing feet

5) Seism ic anchors (Option al)

6) Cable entry

7) Fans

8) Operator control and
display panel

All dimensions are in mm.

56

Figure 42 Front view, door open30-40kVA NX

Installation Drawings

Internal battery trays behind
cover
5x (159 x 364 x 685mm) HWD

1) Output Switch—Q5

2) Maintenance Bypass Switch—Q3

3) Bypass Input Switch—Q2

4) Mains Input Switch—Q1

5) Monitor Board—U2

NXa 30-40kVA

Front View

57

Figure 43 Cable terminal layout—30-40kVA NX

b

Installation Drawings

348

323

299

258

1) Main (Rectifier) connections (N1-U1-V1-W1)

2) Bypass connections (N1-U3-V3-W3)

3) Output connections (N2-U2-V2-W2)

4) Battery connections (+/-)

4.1 > to internal battery

4.2 > to external battery

5) Earth
For split Bypass operation ensure that the

Note 1:

usbars (*) between Bypass and Rectifier input

are removed.

All dimensions are in mm.

58

Figure 44 Location of parallel logic board M3 and options—30-40kVA NX

3

2

Installation Drawings

1

1. Parallel logic board
2 & 2a. Battery Ground Fault

detection, optional

3. Battery start interface,
optional

Current

2a

Transformer
W1-A35S

20

21

59

Figure 45 Internal battery layout and connections—30-40kVA NX

36

+

BATTERY

REDBLUE

38.5

+

BATTERY

REDBLUE

Installation Drawings

1

3

BATTER

Y

120.5

364

+

+

BLUE

+

+

+

685

+

+

+

RED

38.5
BLUE

BLUE

RED

RED

BLUE

+

BATTERY

REDBLUE

38.5

+

BATTERY

RED

38.5

+

BATTERY

1) Internal battery Fuses (+/-)

2) Ebattery connections (+/-)

3) Cable entry

4) Rectifier fuses

5) Contactor

BATTER

Y

All dimensions are in mm.

60

Figure 46 General arrangement—60-80kVA NX

FRO NT VIEW

Installation Drawings

TO P V I E W

1) Air inlet grille

2) Air outlet grille

3) Castors for manoevring

4) Adjustable fixing feet

5) Seismic anchors (Option)

6) Cable entry

7) Fans

8) Operator control and display panel
All dimensions are in mm.

Section A-A

61

Figure 47 Front view doors open—60-80kVA NX

Installation Drawings

1) Parallel logic board

2) Monitor board

3) Battery start Interface
4 and 4a) Battery Ground Fault detection
(optional)

62

Figure 48 Cable terminal layout—60-80kVA NX

Installation Drawings

U1 V1 W1

1. Main (Rectifier) connections (N1-U1-V1-W1)

2. Bypass connections (N1-U3-V3-W3)

3. Output connections (N2-U2-V2-W2)

4. Battery connections (+ / -)

5. Earth

NOTE

1. For split bypass operation, ensure that the busbars (*) between bypass and rectifier

2. All dimensions are in millimeters.

PE

U3 V3 W3

N1 N2

U1 V1 W1 N1 Batt + Batt - N1 U3 V3 W3 U2 V2 W2 N2

Input Batt Bypass Output

U2 V2 W2

6. Mains Input isolator (Q1)

7. Bypass Input isolator (Q2)

8. Maintenance bypass isolator (Q3)

9. Output isolator (Q5)

input are removed.

63

Figure 49 General arrangement—100-120kVA NX

Installation Drawings

1800

700

825

800

1

Front view

53

2

6

Base viewTop view

83

696

4

Side view

1) Air inlet grille

2) Air outlet grille

3) Castors

4) Adjustable fixing feet

5) Seismic anchors (option)

6) Cable entry

64

Figure 50 Front view, door open—100-120kVA NX

5

1

Installation Drawings

1) Input switch (Q1)

2) B ypass s witch (Q2)

3) Ma intena nc e bypa s s
switch (Q3)

4) Output switch (Q5)

5) Monitor board U2

3

Figure 51 Parallel logic board location—100-120kVA NX

2

4

Parallel cable

65

Figure 52 Cable terminal layout—100-120kVA NX

U1 V1 W1

U1V1W1N1Batt +Batt -N1U3V3W3U2V2W2N2

Input Batt Bypass Output

Figure 53 General arrangement—140-200kVA NX

Installation Drawings

2

1

1. Air inlet grille

2. Air outlet grille

3. Casters

4. Adjustable fixing feet

5. Seismic anchors (optional)

6. Cable entry

5

3

4

66

Figure 54 Front view, door open—140-200kVA NX

5

1. Input switch, Q1

2. Bypass switch, Q2

3. Maintenance bypass switch, Q3

4. Output switch, Q5

5. Monitor board, U2

Installation Drawings

1

Figure 55 Parallel logic board location—140-200kVA NX

3

2

4

Parallel
Cable

67

Figure 56 Cable terminal layout—140-200kVA NX

U3 V3 W3 U2 V2 W2 N3N1 W1V1U1

BypassMain Input Output Battery

Installation Drawings

68

Figure 57 Optional external Maintenance Bypass Cabinet, 600mm wide

474

Top
View

160

top cable

190

entry 120x160

824

50

120

260

120

50

600

Installation Drawings

1600

100

585

Side View

Bottom
View

50
55

630

100

175

250

100

Front View

175

388

13 (12x) diameter

571,5

100

152,5

100

bottom cable
entry 250x100

28,5

55

55

433

55 28,5

69

Figure 58 Optional external Maintenance Bypass Cabinet, 800mm wide

539

Top
View

825

120

50

460

120 50

140

top cable
entry 120x160

145

800

Installation Drawings

1600

100

585

Side View

50

55

Bottom
View

100

100

100

588

100

Front View

275

630

55

5528,5

250

633

275

13 (12x)
diameter

165

100

bottom cable
entry 250x100

559

28,5

55

70

Figure 59 Optional External Maintenance Bypass Cabinet, 850mm wide

479

Top
View

200

top cable
entry 150x200

145

150

824

56

438

150 56

850

Installation Drawings

1800

100

585

Side View

Bottom
View

55

28.5

638

100

290 270 290

50

630

55

55

100

683

Front View

55 28.5

100

13 (12x) diameter

152,5

150

bottom cable
entry 270x150

71

Figure 60 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.1

Installation Drawings

72

Figure 61 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.3

Installation Drawings

73

Figure 62 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.5

Installation Drawings

74

6.0 OPERATION

WARNING

!

Hazardous mains and / or battery voltage present behind covers.

No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.

6.1 Introduction

The Liebert NXa Uninterruptible Power System is connected between the Mains AC input source and
the critical load to provide uninterruptible power to the latter. The power from the UPS is free from
voltage and frequency variations and from disturbances experienced at the Mains AC input supply.
This is achieved through high frequency double conversion power pulse width modulation (PWM)
associated with full digital signal processing control (DSP).

As shown in Figure 63, the AC input mains source is supplied at Q1 and converted into a DC source.
This DC source feeds a DC/DC Bidirectional Battery Converter (that ensures the battery to remain
charged at all times) and at the same time feeds the Inverter that converts the DC source into a clean
and input independent AC source. The battery powers the load through the bidirectional battery con­verter and through the inverter in case of an AC input mains power failure. In case of Inverter
unavailability or excessive overload, the load may also be powered from an external AC Bypass source
through input isolator Q2 and the static bypass. Besides this, if maintenance or repair of the UPS is
necessary, the UPS can support the load through the internal and manually controlled maintenance
bypass isolator Q3. With the exception of the maintenance bypass isolator, all the isolators shown are
closed during normal UPS operation.

Operation

Figure 63 Single unit block diagram with split-bypass input

Bypass

Mains

Supply

Input

Mains

Supply

N

Input

Isolator

Q1

Mai nten ance Byp ass I so lator Q 3

Bypass Isolator Q2

DC Bus

Rectifier

Input

Static

Switch

Inverter

CB

Battery

Converter

Battery

Circuit

Breaker

Static Switch

1

UPS Modul e

Bypass Side

Output

Isolator

Q5

UPS

Output

75

2

Battery

6.1.1 Split-Bypass Input

Figure 63 illustrates the Liebert NX UPS in what is known as the split-bypass configuration
wherein a separate power switch to a dedicated bypass power source that also feeds the maintenance
bypass line connects the static bypass line. Where a separate power source is not available, the bypass
and rectifier input supply connections are linked.

6.1.2 Static Transfer Switch

The circuit blocks labeled Static Switch in Figure 63 contain electronically controlled switching cir­cuits that enable 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; 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.

A manually controlled, maintenance bypass supply is incorporated into the UPS design. It enables the
critical load to be powered from the utility (bypass) supply while the UPS is shut down for routine
maintenance.

NOTE

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

Operation

6.1.3 Battery Circuit Breaker

Any external battery is connected to UPS through a circuit breaker fitted inside the battery cabinet –
or located adjacent to the batteries where a battery cabinet is not used. This circuit breaker is closed
manually, but it contains an undervoltage release coil, which enables it to be tripped from the UPS
control electronics following certain detected faults. It also has a magnetic trip facility for overload
protection. The undervoltage release coil control is replaced by a battery contactor located inside the
UPS fitted with either internal batteries or with battery start option or both

6.1.4 Battery Temperature Compensation

For 30-40kVA UPS with internal batteries, a standard temperature probe is installed to measure the
internal battery temperature to optimize battery management. The measured temperature can be
displayed from the UPS front panel.

For UPS with external batteries, an optional battery temperature interface equally optimises the
external battery management by connecting up to four external temperature sensors from the battery
cabinet(s) to a control unit inside the UPS.

For details, refer to Figure 27.)

6.1.5 Redundant Control Power Supply Board

The UPS is equipped with two identical and fully redundant control power supply boards. Each of
them takes inputs from the AC and DC sources. When one of the sources or even if one of the control
power boards fails, the UPS system can still operate normally. This feature further enhances the reli­ability of the system.

6.1.6 Socket Outlet

One single-phase Shuko-type universal outlet of 3A current handling capability provides nominal
UPS output voltage of up to 3A current capacity for the ease of testing, commissioning & servicing of
the UPS.

76

6.2 Multi Module UPS—1+N

Multi-module UPS are formed by several “single unit” UPS modules to constitute “1+N”system where
groups of one or more, up to six, single units operate together for the purpose of providing additional
power or reliability or both. The load is equally shared between any paralleled UPS.

Figure 64 1+N multi-module UPS with external maintenance bypass switch

SUPPLIED BY OTHERS

INPUT MAINS SUPPLY

L1, L2, L3, N

BYPASS MAINS SUPPLY

L1, L2, L3, N

INPUT MAINS SUPPLY

L1, L2, L3, N

BYPASS MAINS SUPPLY

L1, L2, L3, N

INPUT MAINS SUPPLY

L1, L2, L3, N

Operation

Qin UPS3 Qin UPS2 Qin UPS1

Qin Ext Byp

L1, L2, L3, N

Q1

Q5

RECTIFER

INVERTER

Qout
BYP

Q2

Q3

UPS1

CHARGER

L1, L2, L3, N

Q1

RECTIFER

INVERTER

Q5

Qout UPS1

Qout all UPS

Q1

UPS2

RECTIFER

CHARGER

Q2

Q3

L1, L2, L3, N

INVERTER

Q2

Q3

Q5

Qout UPS2

UPS3

CHARGER

UPS3 OUTPUT UPS2 OUTPUT UPS1 OUTPUT

L1, L2, L3, N

Qout UPS3

Distribution Cabinet

Further, single unit or 1+N groups may be configured as “distributed redundant” systems with inde­pendent outputs that nevertheless are synchronised through a Load Bus Synchroniser (LBS) so that
critical loads can be seamlessly transferred from one system to another. See 6.3 - Modes of Opera-
tion for more information.

6.2.1 Features of NX Multi-Module UPS Configurations

1. The hardware and firmware of single module UPS units is completely compatible with the
requirements of a multi-module system. Multi-module configuration is achieved merely through
settings in configuration software and control cables.

2. Parallel control cables are connected in a ring, providing both performance and redundancy.
Dual-bus control cables are connected between any two UPS modules of each bus. The intelligent
paralleling logic provides the user with maximum flexibility. For example, shutting down or
starting up UPS modules in a parallel system can be done in any sequence. Transfers between
Normal and Bypass modes of operation are synchronised and self –recovering e.g. following
overloads and their clearance.

3. The total load of the multi-module system can be queried from each module’s LCD.

77

6.2.2 Requirements for Paralleling of UPS Modules

A group of paralleled modules behave as if it were one large UPS with the advantage of presenting
higher reliability. In order to assure that all modules are equally utilised and to comply with relevant
wiring rules, the following requirements apply:

1. All UPS modules must be of the same rating and must be connected to the same bypass source.

2. The bypass and the main input sources must be referenced to the same neutral potential.

3. Any RCD, Residual Current monitoring device, if installed, must be of an appropriate setting and
located upstream of the common neutral bonding point. Alternatively, the device must monitor
the combined 4-wire rectifier and split-bypass input currents of the system. Refer to the High
Leakage Current Warning on page 1.

4. The outputs of all UPS modules must be connected to a common output bus.

NOTE

Optional isolation transformers are available for applications where sources do not share the
same neutral reference or where the neutral is not available.

5. Passive bypass current equalising chokes are available as an option in systems comprising more
than three parallel redundant UPS modules (or two or more parallel capacity UPS modules).

6.3 Modes of Operation

The NX UPS is an on-line, double-conversion, reverse-transfer UPS that permits operation in these
modes:

•Normal Mode

• Battery Mode (Stored Energy Mode)

• Auto-Restart Mode

• Bypass Mode

• Maintenance Mode (Manual Bypass)

• ECO Mode

• Parallel Redundancy Mode

• Hot-Standby Mode

• Frequency Converter Mode

Operation

6.3.1 Normal Mode

The UPS inverter continuously supplies the critical AC load. The rectifier/charger derives power from
the AC mains input source and supplies DC power to the inverter while simultaneously FLOAT or
BOOST charging its associated backup battery.

6.3.2 Battery Mode (Stored Energy Mode)

Upon failure of the AC mains input power; the inverter, which obtains power from the battery, sup­plies the critical AC load. There is no interruption in power to the critical load upon failure or restora­tion of the AC mains input power after which the “Normal Mode” operation will continue without the
necessity of user intervention.

6.3.3 Auto-Restart Mode

The battery may become exhausted following an extended AC mains 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. This mode and any delay time are programmed by the
commissioning engineer.

78

6.3.4 Bypass Mode

If the inverter overload capacity is exceeded, or if the inverter becomes unavailable for any reason,
the static transfer switch will perform a transfer of the load from the inverter to the bypass source,
with no interruption in power to the critical AC load. Should the inverter be asynchronous with the
bypass, the static switch will perform a transfer of the load from the inverter to the bypass with inter­ruption in power to critical AC load. This is to avoid paralleling of unsynchronised AC sources. This
interruption is programmable but typically set to be less than 3/4 of an electrical cycle, e.g., less than
15ms (50Hz) or less than 12.5ms (60Hz).

6.3.5 Maintenance Mode (Manual Bypass)

A manual bypass switch is available to ensure continuity of supply to the critical load when the UPS
becomes unavailable e.g. during a maintenance procedure. This manual bypass switch is fitted in all
UPS modules and rated for full load of one module.

6.3.6 ECO Mode (Single UPS Only)

If ECO mode is selected, the double-conversion UPS operation is inhibited at most times for the pur­pose of saving energy. In this mode of operation, not unlike UPS of line-interactive or stand-by tech­nology, the bypass is the preferred source and only when the voltage and / or frequency of the bypass
supply are beyond pre-defined and adjustable limits the critical AC load is transferred to the inverter.
This transfer takes place with an interruption of less than 3/4 of an electrical cycle, e.g., less than
15ms (50Hz) or less than 12.5ms (60Hz).

6.3.7 Parallel Redundancy Mode (System Expansion)

Operation

For higher capacity or higher reliability or both, the outputs of up to six UPS modules can pro­grammed for directly paralleling while a built-in parallel controller in each UPS ensures automatic
load sharing.

6.3.8 Hot-Standby Mode

This is an alternative 1+1 redundancy application that ensures higher availability or better usage
control or both. Two UPS are connected in Hot Stand By mode as follows: UPS 1connects to the criti­cal load, and UPS 2 connects to the bypass of UPS 1. The remaining AC inputs are connected to the
incoming AC mains supply. UPS 1 synchronises to the output of the UPS 2 ensuring uninterrupted
load transfer from UPS 1 to UPS 2 or vice versa. This ensures that any specified load is supplied by a
UPS while still providing a bypass path to cater for overloads. Further, the system can also be pro­grammed to reverse UPS1 between Normal and Bypass Modes so that each UPS is equally utilised.
This interval is programmable from 1 to 4,320 hours (180 days).

6.3.9 Frequency Converter Mode

The NX UPS can be programmed into frequency converter mode for either 50Hz or 60Hz stable out­put frequency. The input frequency may vary from 40Hz to 70Hz. In this mode the static bypass oper­ation is disabled, and the battery becomes optional depending on any requirement to operate in
battery mode (stored energy mode).

6.3.10 Source Share Mode (Co-Generation)

NXa modules have the capability of fully supporting their critical load while limiting the amount of
power taken from the incoming AC mains supply. Any balance of power required is supplied by the
UPS battery. This feature is useful e.g. in applications where peak-hour tariffs apply or where a gen­erator smaller than needed feeds the UPS during mains outages. The Source Share Mode is user-acti­vated and the ratio of the main AC input power is programmable from 20% to 100% of the rated UPS
power.

79

Operation

6.4 Battery Management—Set During Commissioning

6.4.1 Normal Function

• Constant charging current—Current can be set up to limit charging power.

• Constant boost voltage (if applicable)—Voltage of boost charging can be set as required by the
type of battery.

For Valve Regulated Lead Acid (VRLA) batteries, maximum boost charge voltage should not
exceed 2.4V / cell.

• Float Charge—Voltage of float charging can be set as required by the type of battery.
For VRLA, float charge voltage should be between 2.2V to 2.3V.

• Float Charge Temperature Compensation (optional)—A coefficient of temperature compen­sation can be as required by the type of battery.

• End of discharge protection (EOD)—If the battery voltage is lower than the EOD, the battery
converter will shut down and the battery is isolated to avoid further battery discharge. EOD is
adjustable from 1.6V to 1.75V per cell (VRLA) or 0.9 to 1.1 V per cell (NiCd).

• Battery Low Warning Time—Adjustable between 3 and 60 minutes. The default is 5 minutes.

6.4.2 Advanced Functions (Software Settings Performed by the Commissioning Engineer) Battery Self-Test and Self-Service

At periodic intervals 20% of the rated capacity of the battery will be discharged automatically at a
rate equal to 15% (kW) of the rated UPS (kVA) capacity. During discharge the rectifier provides the
balance necessary to feed the load. The minimum amount of load must exceed 20% of the nominal rat­ing of the UPS module. If the load is less than 20%, auto-discharge cannot be executed. The periodic
interval can be set from 30 to 360 days. The periodic testing can also be inhibited.

• Conditions—Battery at float charge for at least 5 hours, load 20~100% of rated UPS capacity

• Trigger—Manually through the command of Battery Maintenance Test in LCD panel or auto­matically

• Battery Self-Test Interval—30-360 days (default setting is 60 days)

6.5 Battery Protection (settings by commissioning engineer)

Battery Undervoltage Pre-warning

The battery undervoltage pre-warning occurs before the end of discharge. After this pre-warning, the
battery should have the capacity for 3 remaining minutes discharging with full load. The time is user
configured from 3 to 60 minutes.

Battery End of Discharging (EOD) Protection

If the battery voltage is lower than the EOD, the battery converter will be shut down. EOD is adjust­able from 1.6V to 1.75V per VRLA cell (or 1.0 to 1.1 V per NiCd cell).

Battery Contactor Fault Warning

If the battery contactor monitor status is different from the drive signal, this warning will occur.

Battery Disconnect Devices

For 30- 40kVA models with internal batteries and for any model fitted with a Battery Start kit, the
UPS contains an internal contactor for automatic connection and disconnection of the batteries. The
relevant features are:

• Low battery safety cutoff

• Connect/disconnect status displayed via LCD

• Overcurrent protection

• Maximum discharging time protection (1 to 72 hours)

For models above 40kVA and not fitted with an internal contactor:
The features above (except automatic connect) are performed by connecting the external battery to

the UPS through an external battery circuit breaker, which is manually closed and electronically
tripped via the UPS control circuits.

80

7.0 OPERATING PROCEDURES

WARNING

!

Hazardous mains and / or battery voltage present behind covers.

No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.

7.1 Introduction

Following installation and commissioning by an authorised service engineer, the UPS will operate in
one of the modes described in 6.3 - Modes of Operation. This chapter describes the various proce­dures available for the operator to intervene with the UPS mode of operation including starting up,
transferring load to bypass and shutting down.

NOTE

All the user controls and indicators mentioned in these procedures are identified in 8.0 ­Operator Control Panel and Display.

All power switches mounted inside the cabinet and accessible after opening the key-locked front
door are shown in Figure 63 and described in 7.0 - Operating Procedures.

7.2 Startup in Normal Mode

Operating Procedures

This procedure must be followed when turning on the UPS from a fully powered down condition - i.e.,
where the load is not being initially supplied at all or where supplied by the maintenance bypass
switch. It is assumed that the installation is complete, the system has been commissioned by autho­rized personnel and the external power isolators are closed.

81

Operating Procedures

In multi-module systems—perform each step of the procedure in every UPS module before proceed-
ing to the next step.

WARNING

!

Mains Voltage will be applied to UPS output terminals.

This procedure results in mains voltage being applied to the UPS output terminals.

• Isolate and attach warning labels to any downstream load connections, as applicable.

• No operator serviceable parts are located behind covers that require a tool for removal.

• Only qualified service personnel are authorised to remove such covers.

1. Open the UPS door to gain access to the main power switches.

2. Close Bypass input power switch Q2 and UPS output power switch Q5.
Close also any external output isolation switches, where used.
The LCD becomes active and after initialization, the UPS output is powered from the bypass,

with the bypass and load indicators turned on.
The UPS Mimic LED's will indicate (refer to Figure 67):

# LED

LED Function Status

3 Bypass indicator Green
5 Output indicator Green
2 Battery indicator Red
6 Alarm indicator Amber / red

3. Close the Rectifier AC Input Power Switch Q1.
The Rectifier indicator flashes on the UPS mimic panel during the startup of rectifier and

becomes steady green once the rectifier reaches normal operation state after about 30s.

4. Close external battery circuit breaker (where an external battery is used). This breaker is located
inside the battery cabinet (if used) or is otherwise adjacent to the battery racks

5. Following battery availability being detected by the UPS, the red battery indicator extinguishes
moments after when the battery charger starts operation.

6. Open (or confirm open) the internal Manual Bypass Power Switch Q3.
Open also any external Maintenance Bypass Switch, where used.

7. Press INVERTER ON button for two seconds.
The inverter will start up and the inverter indicator flashes while it synchronises to the bypass

voltage frequency.
After the inverter is ready, the UPS transfers from bypass to inverter, the bypass indicator turns

off, and the inverter indicator becomes steady green.

8. Check that no “Warning” message is displayed in the top right corner of the LCD Monitor and the
status of the indicators are:

# LED

LED Function Status

1 Rectifier indicator Green
2 Battery indicator Off
3 Bypass indicator Off
4 Inverter indicator Green
5 Output indicator Green
6 Alarm indicator Off

The UPS is now operating in NORMAL mode.

82

7.3 Startup into ECO Mode

Applies only to a single module UPS and when programmed by the commissioning engineer to per­form ECO mode control of the power delivered to the load.

Follow 7.2 - Startup in Normal Mode and observe at the end of the procedure that the mimic panel
bypass indicator remains green (indicating that the load is supplied by the bypass mains).

The UPS is now operating in ECOMODE.

7.4 Battery Test Mode Procedures

The Battery test mode procedures transfer the UPS into shared source mode wherein approximately

15% of the rated load power is supplied by the battery and the balance by the AC input mains. There
are two Battery tests to select from:

Maintenance test—verifies battery integrity and leads to a 20-percent battery discharge.

Battery Capacity test—verifies the battery’s precise capacity and leads to a full battery discharge
(until “Battery Low” alarm).

The battery test procedures are password-controlled and menu-driven. The test is immediately termi­nated in the event of a battery or a mains failure and the total load power is supported from the
remaining source without interruptions.

The tests can be carried out from the UPS control panel by the operator when the following conditions
are satisfied:

Operating Procedures

• The load must be between 20% and 100% of rated UPS capacity

• The battery must have been float charging for 5 hours or more.

7.4.1 Test Procedure

1. Select “Commands” window on the UPS control panel.
Use the right or left arrow keys to navigate to the “Commands” window.

2. Select desired Test.
Use “page” (F1) and up / down arrow keys (F2, F3) to highlight the desired test. Press “enter” (F4).

When prompted, enter each password digit with up arrow (F2) and use right arrow (F3) to access
next field. Press “enter” (F4) when all digits have been entered.

3. Wait until the test completes.
This tests updates the battery information used to calculate the expected back-up time (displayed

during AC input failure) and the battery capacity percentage when compared to a new battery
(displayed in normal mode).

4. Stop test.
If required, the test may be stopped before completion by selecting “Stop Test” in the “Commands”

window.

For more details on how to operate the UPS control panel refer to 8.0 - Operator Control Panel
and Display.

83

7.5 UPS Self-Test

The UPS test procedure checks the control functions of the UPS, the mimic flow chart LEDs and the
audible alarm. This self-test is password controlled and menu driven. It can be carried out from the
UPS front panel by the operator and takes 5 seconds.

7.5.1 UPS Self-Test Procedure

1. Select “Commands” window on the UPS front panel.
Use the right or left arrow keys to navigate to the “Commands” window

2. Select desired Test.
Use “page” (F1) and up / down arrow keys (F2, F3) to highlight the desired test. Press “enter” (F4).

When prompted, enter each password digit with up arrow (F2) and use right arrow (F3) to access
next field. Press “enter” (F4) when all digits have been entered.

3. Wait until the test completes.
After 5 seconds, a popup window will appear to showing the result of this diagnosis: Rectifier,

Inverter, Monitor OK or Fault

4. Stop test.
If required, the test may be stopped before completion by selecting “Stop Test” in the “Commands”

window.

For more details on operating the UPS front panel, see 8.0 - Operator Control Panel and Display.

7.6 Maintenance Bypass Procedure and UPS Shutdown

The following procedure transfers the load supply from being protected by the UPS into being connected
directly to the AC input bypass supply though a maintenance bypass switch. This switch is either:

• internal (Q3- located behind the front door) for “Single module” or “1+1 redundant multi-module”
UPS applications.

• external (located in the bypass cabinet) for “1+1 capacity” and “1+N redundant” multi-module
UPS applications – refer to Figure 64.

Operating Procedures

In multi-module systems—perform each step of the procedure in every UPS module before proceed­ing to the next step.

CAUTION

!

Risk of Load Interruption

Except in emergency situations, so as not to risk a short interruption in powering the load,
before initiating this bypass procedure, confirm that no WARNING status is displayed in the
top right corner of the UPS Monitor.

If a WARNING status is displayed, the operator will be prompted to confirm (“enter”) or
cancel (“ESC”) any action that can lead to load interruption.

1. Press INVERTER OFF direct access key on the UPS front panel.
The UPS inverter will shut down and the load is supplied through the Static Bypass supply.The

UPS Mimic indicator Inverter ON (4) will extinguish, the Status LED (6) turns on.

2. In “Single module” or “1+1 redundant” multi-module UPS—Close the internal maintenance
bypass power switch Q3 and any external maintenance bypass switch, if used.

3. In “1+N redundant” or “1+1 capacity” multi-module UPS—Close the external maintenance switch
only.

4. The Maintenance Bypass supply is now in parallel with the UPS Static Switch supply.

5. The display window will show messages reflecting the actions taken (i.e. Maintenance Bypass
closed, etc.).

6. Open output power switch Q5.
This ends the Bypass Procedure. The load is now powered directly from the Maintenance Bypass

supply.

NOTE

The load equipment is NOT protected from AC supply aberrations.

Proceed with the following steps to shutdown the rectifier and battery.

84

Operating Procedures

7. Press the EPO (Emergency Power Off) button at the UPS front panel of this UPS module only.
This will disable further Rectifier, Inverter, Static Switch and Battery operation. This will not
affect the manual maintenance bypass power switch.

NOTE

Do not press any remote EPO button.

8. Open the Rectifier input power switch Q1 and Static bypass input power switch Q2

9. When an external battery is connected, open external battery circuit breaker. This breaker is
located inside the battery cabinet (if used) or is otherwise adjacent to the battery racks
All mimic panel LED indications and messages will extinguish as the mains driven internal
power supplies decay.

The load is now powered from the maintenance bypass supply and the UPS is completely
shut down.

WARNING

!

Hazardous Voltage at UPS terminals

No operator-serviceable parts are located behind covers that require a tool for their removal.

Only qualified service personnel are authorised to remove such covers.

The input and output AC and DC battery and connecting terminals remains energized at
hazardous voltage levels at all times. The battery is located behind protective covers that
require a tool for their removal. inside the UPS cabinet (30 and 40kVA models), inside a free­standing battery cabinet or on open racks inside a dedicated battery room that may be locked.

Figure 65 Example of configuration for single UPS with external Maintenance Bypass Cabinet

External Maintenance Bypass Cabin et

U3/V3/W3/N3

QF2

U4/V4/W4/N4

Q1

U1/V1/W1/N1

Supplied

by O thers

UPS

QF3

U5/V5/W5/N5

QF4

U6/V6/W6/N6

Q3

Q2

Q5

U2/V2/W2/N2

CB

85

Operating Procedures

7.7 Isolation of One Module in a Multi-Module System

7.7.1 Multi-Module Systems With External Output CB1

Figure 66 Typical 1+N system block diagram with common input supply, with separate batteries and

optional output / bypass distribution panel

Supplied

by Ot he r s

Input M a i ns

Supply L1, L2, L3, N

UPS1

Charger

Input M ai ns

Supply L1, L2, L3, N

Q1

Q1

UPS2

Rectifier

Rectifier

Charger

Inverter

Inverter

Q2

Q3

Q5

Q5

L1 , L2, L3 , NL1, L2, L3, N

Q1EXT Q2EXT

Q2

Q3

QUPS

QBYP

Dist ribution Cabinet

To Load

1. Turn Off inverter.

2. Open External Output isolator (Q1ext or Q2ext).
The UPS enters Isolation Status automatically, parallel signaling and communication becomes

masked, and output becomes inhibited.

3. Power Off unit for maintenance.

4. Power On unit.

5. Unit enters Test Mode by configuration software setting.

6. Diagonosis or testing.

7. The UPS exits Test Mode by configuration software setting.
Output becomes inhabited because of Isolation Status.

8. Return all switches to the Normal position.

9. Close External Output isolator (Q1ext or Q2ext).
The UPS exits Isolation Status automatically, parallel signaling and communication recovers,

86

output becomes enabled but interlocking works now.

10. Turn On inverter and join the parallel system.

7.7.2 Multi-Module System Without External Output Circuit Breaker 1

This procedure is indicated for isolation of one UPS module from other modules of a group of other­wise normally operating paralleled UPS modules. Only the power switches, isolators and circuit
breakers in the module to be isolated will be opened. This procedure does not require the supply of
any bypass power to the critical load.

1. Turn Off the inverter

2. Open Internal Output isolator (Q5) but keep Internal Maintenance Circuit Breaker open.
The UPS enters Isolation Status automatically, parallel signaling and communication become

masked, and internal output becomes inhibited.

3. Power Off unit for maintenance.

4. Power On unit with Internal Output isolator (Q5) open.

5. The UPS enters Test Mode by configuration software setting.

6. Diagonosis or testing.

7. The UPS exits Test Mode by configuration software setting.
Output becomes inhibited because of Isolation Status.

8. Return all switches of Unit 1 to the Normal position, including Internal Output Circuit Breaker 1.

When Internal Output isolator (Q5) is closed, unit will exit Isolation Status automatically, parallel

signaling and communication recovers, output becomes enabled but interlocking works now.

9. Turn On Inverter1 and join the parallel system.

Operating Procedures

WARNING

!

Hazardous Battery Voltage

No operator serviceable parts are located behind covers that require a tool for their removal.

Only qualified service personnel are authorised to remove such covers.

The UPS battery and connecting terminals remains energized at hazardous voltage levels at
all times. The battery is located behind protective covers that require a tool for their removal:
inside the UPS cabinet (30 and 40kVA models), inside a free-standing battery cabinet or on
open racks inside a dedicated battery room that may be locked.

87

7.8 Insertion of One Module in a Multi-Module System

This procedure is indicated to reintegrate a UPS module that has been previously isolated from other
modules of a group of paralleled UPS modules. It is assumed that the installation is complete, the sys­tem has been commissioned by authorized personnel and the external power isolators are closed.

WARNING

!

Mains voltage will be applied to UPS output terminals.

No operator serviceable parts are located behind covers that require a tool for their removal.

Only qualified service personnel are authorised to remove such covers.

1. Open the UPS door to gain access to the main power switches.

2. Open (or confirm disabled) maintenance bypass power switch Q3

3. Close input bypass power switch Q2 and UPS output power switch Q5.
(Close also any external output isolation switches, where used). The LCD display becomes active.

4. Close the Rectifier AC Input Power Switch Q1.
The Rectifier indicator flashes on the UPS mimic panel during the startup of rectifier and
becomes steady green once the rectifier reaches normal operation state after about 30s.

5. Close external battery circuit breaker QF1 (where an external battery is used). This breaker is
located inside the battery cabinet (if used) or is otherwise adjacent to the battery racks

6. Following battery availability being detected by the UPS, the red battery indicator extinguishes
moments after when the battery charger starts operation.

7. Press INVERTER ON button for two seconds.
The inverter will start up and the inverter indicator flashes while it synchronises to the load volt-

age frequency. After the inverter is ready, the UPS connects to the load, the inverter indicator
becomes steady green and the output indicator turns green.

8. Check that no “Warning” message is displayed in the top right corner of the LCD Monitor and the
status of the indicators as follows:

Operating Procedures

# LED

The UPS is now operating in NORMAL mode

LED Function Status

1 Rectifier indicator green
2 Battery indicator off
3 Bypass indicator off
4 Inverter indicator green
5 Output indicator green
6 Alarm indicator off

88