Emerson 480V, 60HZ User Manual
Liebert NX™ UPS
User Manual–40-200kVA, 480V, 60Hz
AC Power
For Business-Critical Continuity™
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1 External Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Internal Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.1 Storing for Delayed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3.1 Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 UPS Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.1 Positioning the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.2 Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.3 Special Considerations for Parallel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 Considerations in Moving the Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6.1 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.2 Floor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.3 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.4 Optional Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.0 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Power Cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.1 Cable Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.2 UPS Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.3 Cabling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.4 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.5 Safety Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1.6 Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1.7 Cabling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2.1 Monitor Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3 Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.1 Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3.2 Maintenance Bypass Cabinet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3.3 Battery Circuit Breaker Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.4 Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.5 EPO Input—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.0 BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3 External Battery Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.1 Battery Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.2 Connecting the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.3 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.4 Connecting the Battery Cabinet to the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
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3.4 Non-Standard Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.5 BCB Shunt Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.6 Alber Monitoring System—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.0 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.1 Load Bus Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1.1 Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1.2 LBS Cable and Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2 Configuring Parallel System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.2 Features of Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.3 Operating Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2.4 Operation Modes Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3 Installing Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.1 Conditions for Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.2 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.3 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.4 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.5 Parallel Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.6 Emergency Power Off (EPO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.0 UPS SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
5.1 Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2 UPS Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.3 UPS Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.4 UPS Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.4.1 Input Rectifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4.2 DC Intermediate Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.4.3 Inverter Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.4.4 Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.0 O
7.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
PERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
7.1.1 Bypass Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.1.2 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.0 OPERATOR CONTROL AND DISPLAY PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
8.1 Operator Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.1.1 Display Panel Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.2 Mimic Display Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.3 Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.4 Audible Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.5 LCD Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.6 Navigation Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.7 UPS System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.8 LCD Menus and Data Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8.9 Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
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8.10 Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.11 UPS Status Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.12 Types of LCD Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.12.1 Opening Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.12.2 Default Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.12.3 UPS Help Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
8.12.4 Screen Saver Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
8.13 Pop-Up Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.13.1 From Bypass to Inverter Mode With Power Interruption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.13.2 From Inverter to Bypass Mode With Interruption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.13.3 System Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.13.4 Battery Capacity Test Confirmation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.13.5 Battery Self-Test Aborted, Condition Not Met . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.13.6 Battery Refresh Charge Aborted, Condition Not Met . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
9.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
9.1 Liebert NX Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.1.1 Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9.2 UPS Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9.2.1 Startup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9.2.2 Verify Switching Between Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
9.3 Maintenance Bypass Procedure and Powering Down the UPS . . . . . . . . . . . . . . . . . . . . . . . 80
9.4 Auto Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.5 Emergency Shutdown With EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.6 Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions . . . . . . . . . . 81
9.7 Battery Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.7.1 Battery Undervoltage Pre-Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.7.2 Battery End-of-Discharge (EOD) Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.8 Multi-Module System Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.8.1 Isolating One Module in a Multi-Module System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.8.2 Inserting One Module into a Multi-Module System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.8.3 Shutdown Procedure—Complete UPS and Load Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.9 Commissioning a Parallel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.10 Parallel System Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
10.0 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
10.1 Communication and Other User Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
10.1.1 Analog Input Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
10.1.2 Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
10.1.3 Liebert IntelliSlot Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
10.1.4 Communication and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
10.1.5 Configuring Baud Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
10.2 LBS Mode—Load Bus Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
10.2.1 Remote Alarm Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
10.3 Replacing Dust Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
iii
11.0 SPECIFICATIONS AND TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
11.1 Lug Size and Torque Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
11.2 Cable Lengths: Floor to Connection Point Inside UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
11.3 Cable size and tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
11.4 Battery Run Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
APPENDIX A-UPS STATUS MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
FIGURES
Figure 1 Cabinet arrangement—Liebert NX units and battery cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2 Cabinet arrangement—Liebert NX UPS, battery cabinets and Liebert NX bypass
distribution cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 3 Single module block diagram—dual input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4 Input and output busbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5 Monitor board U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 6 Auxiliary terminal block detail (Monitoring Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 7 Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 8 Output dry contacts and EPO wiring for firmware before M170 . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 9 EPO wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 10 Battery cabinets for Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11 Battery cabinet—details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 12 Battery tray and supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 13 Load Bus Synchronization cable connection in single module systems. . . . . . . . . . . . . . . . . . . . . 26
Figure 14 Load Bus Synchronization cable connection with multi-module systems . . . . . . . . . . . . . . . . . . . 27
Figure 15 Parallel system block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 16 Paralleling cabinet with input and bypass circuit breakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 17 Paralleling cabinet with input, bypass and distribution circuit breakers. . . . . . . . . . . . . . . . . . . 29
Figure 18 Connecting system parallel control cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 19 Auxiliary dry contact cables for output breaker in multi-module system . . . . . . . . . . . . . . . . . . . 31
Figure 20 Connecting EPO push button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 21 Liebert NX 40-120kVA dimensional view—front and left side . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 22 Liebert NX 40-120V dimensions continued—top and bottom view . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 23 Liebert NX 40-120kVA main components—typical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 24 Liebert NX 160-200kVA dimensional view—front and left side . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 25 Liebert NX 160-200kVA dimensions continued—top and bottom view. . . . . . . . . . . . . . . . . . . . . 42
Figure 26 Liebert NX 160-200kVA main components—typical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 27 Liebert NX 40-120kVA cable connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 28 Liebert NX 160-200kVA cable connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 29 Outline drawing, 33" battery power pack system, single cabinet . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 30 Terminal details, 33" battery power pack system, single cabinet Liebert NX . . . . . . . . . . . . . . . 47
Figure 31 Outline drawing, 49" battery power pack system, single cabinet . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 32 Terminal details, 49" battery power pack system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 33 Liebert NX 160-200kVA UPS to 49" battery cabinet interconnection . . . . . . . . . . . . . . . . . . . . . . 50
Figure 34 Liebert NX 40-120kVA UPS to 33" battery cabinet interconnection . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 35 Outline drawing, Liebert NX 480V 33" parallel cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 36 Outline drawing, Liebert NX 480V 49" parallel cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 37 Liebert NX 480V paralleling cabinet with input and bypass circuit breakers, main
components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 38 Liebert NX 480V paralleling cabinet main components—input, bypass and distribution
circuit breaker configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
iv
Figure 39 Main component location drawing Liebert NX 480V, CB2, CB3, CB4 configurations . . . . . . . . . 56
Figure 40 Liebert NX 480V 40-120kVA UPS to Paralleling Cabinet Interconnection—Configuration
BB0, FB0, KB0 parallel connection to Liebert NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 41 Interconnecting details for Liebert NX 40-120kVA UPS to paralleling cabinet with input,
bypass and distribution circuit breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 42 Lineup detail—Configuration CB2, CB3, CB4 parallel connection to Liebert NX . . . . . . . . . . . . 59
Figure 43 Line-up detail, bolt together description, 40-120 kVA Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 44 Single module block diagram (dual input configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 45 Overview of control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 46 Detailed view of control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 47 Mimic display indicators location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 48 Location of control buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 49 Buzzer location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 50 Sections of the LCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 51 Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Figure 52 Language selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 53 Set date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 54 Current status and history log records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 55 Opening display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 56 Default screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 57 Help screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 58 Screen saver window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 59 Circuit breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 60 Typical parallel system block diagram with common input supply, with separate
batteries and optional output / bypass distribution panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure 61 Monitoring board (U2) auxiliary terminal block detail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Figure 62 Liebert IntelliSlot Web card display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 63 MultiPort 4 card pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 64 Dust filter replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
v
TABLES
Table 1 Input dry contacts at X3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 2 Maintenance bypass cabinet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 3 BCB control interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 4 Output dry contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 5 EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 6 Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 7 UPS mechanical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 8 UPS terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 9 Rectifier input power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 10 Input voltage window with derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 11 Liebert approved replacement batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 12 DC intermediate circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 13 Inverter output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 14 Bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 15 Mimic display status indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 16 Control buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 17 Icons for navigation keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 18 Description of items in UPS system window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 19 Descriptions of UPS menus and data window items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 20 UPS operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 21 Liebert NX communication options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Table 22 Relay Card pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 23 Relay card jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 24 Torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 25 Battery torque rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 26 Distance to connection points on the Liebert NX UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 27 Parallel system current table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 28 External cabinet dimensions, including side panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 29 Cable size tightening torque at Liebert NX 40kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . . 93
Table 30 Cable size tightening torque at Liebert NX 60kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . . 93
Table 31 Cable size tightening torque at Liebert NX 80kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . . 93
Table 32 Cable size tightening torque at Liebert NX 100kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . 94
Table 33 Cable size tightening torque at Liebert NX 120kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . 94
Table 34 Cable size tightening torque at Liebert NX 160kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . 94
Table 35 Cable size tightening torque at Liebert NX 200kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . 94
Table 36 Cable size tightening torque at Liebert NX 480V Battery Cabinet DC input bus terminals. . . . 94
Table 37 Enersys battery run times in minutes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Table 38 C&D Dynasty battery run times in minutes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Table 39 UPS status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
vi
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert NX
Read this manual thoroughly, paying special attention to the sections that apply to your installation,
before working with the UPS. Retain this manual for use by installing personnel.
!
™
UPS and ancillary equipment.
WARNING
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight ranges from 1180 to 2205 lb. (535 to 1000kg).
Determine unit weight and locate center of gravity symbols
before handling the UPS. Test lift and balance the cabinet
before transporting. Never tilt equipment more than 15 degrees from vertical.
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.
Follow all battery safety precautions when installing, charging or servicing batteries. In
addition to the hazard of electric shock, gas produced by batteries can be explosive and
sulfuric acid can cause severe burns. When connected, the nominal battery voltage is 480VDC
and is potentially lethal.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.
Extreme caution is required when performing maintenance. Be constantly aware that the
UPS system contains high DC as well as AC voltages.
Check for voltage with both AC and DC voltmeters prior to making contact.
WARNING
!
As with other types of high power equipment, dangerous voltages are present within the UPS
and battery enclosure. The risk of contact with these voltages is minimized as the live
component parts are housed behind a hinged, lockable door. Further internal safety screens
make the equipment protected to IP20 standards.
No risk exists to any personnel when operating the equipment in the normal manner,
following the recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be
carried out only by trained personnel.
WARNING
!
High ground leakage current: Ground connection is essential before connecting the input
supply.
This equipment must be grounded in accordance with local electrical codes.
Maximum load must not exceed that shown on the UPS rating label.
CAUTION
!
This equipment is fitted with RFI suppression filters.
Ground leakage current exceeds 3.5 mA and is less than 30 mA.
Transient and steady-state ground leakage currents, which may occur when starting the
equipment, should be taken into account when selecting instantaneous residual current
circuit breakers (RCCBs) or residual current devices (RCDs).
RCCBs must be selected sensitive to DC unidirectional pulses (Class A) and insensitive to
transient current pulses.
Note also that the ground leakage currents of the load will be carried by this RCCB or RCD.
1
WARNING
!
Under typical operation and with all UPS doors closed, only normal safety precautions are
necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system and the batteries. Observe all safety precautions in this
manual before handling or installing the UPS system. Observe all precautions in this manual,
before as well as during performance of all maintenance procedures. Observe all battery
safety precautions before working on or near the battery.
This equipment contains several circuits that are energized with high voltage. Only
test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with an AC and DC voltmeter to ensure safety before making
contact or using tools. Even when the power is turned Off, dangerously high electric charges
may exist within the UPS.
All power and control wiring should be installed by a qualified electrician. All power
and control wiring must comply with the NEC and applicable local codes.
ONLY qualified service personnel should perform maintenance on the UPS system.
When performing maintenance with any part of the equipment under power, service
personnel and test equipment should be standing on rubber mats. The service personnel
should wear insulating shoes for isolation from direct contact with the floor (earth ground).
Never work alone, even if all power is removed from the equipment. A second person should
be standing by to assist and summon help in case an accident should occur.
CAUTION
!
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J
of the FCC rules. These limits provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with this instruction manual, may cause harmful
interference to radio communications. This unit is not designed for use in a residential area.
Operation of this unit in a residential area may cause harmful interference that the user must
correct at his own expense.
Battery Cabinet Precautions
The following warning applies to all battery cabinets supplied with UPS systems. Additional warnings and cautions applicable to battery cabinets may be found in 3.0 - Battery Installation.
WARNING
!
Internal battery strapping must be verified by manufacturer prior to moving a battery cabinet
(after initial installation).
• Battery cabinets contain non-spillable batteries.
• Keep units upright.
• Do not stack.
• Do not tilt.
Failure to heed this warning could result in smoke, fire or electric hazard.
Call 1-800-LIEBERT before moving battery cabinets (after initial installation).
WARNING
!
The Liebert NX’s internal batteries are connected and energized even if the UPS is turned
Off. To minimize the risk of injury, a properly trained and qualified service person should
disconnect the batteries before any maintenance is performed on the unit.
Servicing of batteries should be performed or supervised only by properly trained and
qualified personnel knowledgeable about batteries and the required precautions.
When replacing batteries, replace with the same manufacturer and type, or equivalent. See
your local Emerson representative for a list of approved batteries.
2
CAUTION
!
Do not dispose of batteries in a fire. They may explode.
CAUTION
!
Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes. It is
toxic.
CAUTION
!
A battery can present a risk of electrical shock and high short circuit current. The following
precautions should be observed when working on batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries.
• Disconnect charging source prior to connecting or disconnecting battery terminals.
• Determine if battery is inadvertently grounded. If the battery is inadvertently grounded,
remove source from ground. Contact with any parts of a grounded battery can result in electrical shock. The likelihood of such shock can be reduced if such grounds are removed during installation and maintenance (applicable to equipment and remote battery supplies not
having a grounded supply circuit).
CAUTION
!
Risk of explosion if battery is replaced with an incorrect type.
Dispose of used batteries according to the instructions.
When replacing batteries, replace with the same manufacturer and type, or equivalent. See
your local Emerson representative for a list of approved batteries.
3
GLOSSARY OF SYMBOLS
!
PbH2SO4
-
+
R
Risk of electrical shock
Indicates caution followed by important instructions
AC input
AC output
i
Requests the user to consult the manual
Indicates the unit contains a valve-regulated lead acid battery
Recycle
DC voltage
Equipment grounding conductor
Bonded to ground
AC voltage
4
1.0 INSTALLATION
Liebert’s NX Uninterruptible Power Supply system provides continuous, high-quality AC power to
your business-critical equipment, such as telecommunications and data processing equipment. The
Liebert NX UPS supplies power that is free of the disturbances and variations in voltage and frequency common to utility power, which is subject to brownouts, blackouts, surges and sags.
The Liebert NX utilizes the latest in high-frequency, double-conversion pulse width modulation technology and fully digital controls to enhance its reliability and increase the ease of use. This section
describes the Liebert NX’s environmental requirements and mechanical considerations that must be
taken into account when planning the positioning and cabling of the UPS equipment.
Because every site is unique, this section presents a guide to general procedures and practices that
should be observed by the installing engineer, rather than step-by-step installation instructions.
WARNING
!
Do not apply electrical power to the UPS equipment before the arrival of the commissioning
engineer.
WARNING
!
The UPS equipment should be installed by a qualified engineer in accordance with the
information contained in this section.
Installation
WARNING
!
Special care should be taken when working with the batteries associated with this equipment.
When connected together, the nominal battery voltage is 480VDC and is potentially lethal.
• 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 skin, the affected area should be washed immediately
with large amounts of water.
NOTE
The Liebert NX UPS can be used in TN utility system.
1.1 External Inspections
1. While the UPS system is still on the truck, inspect the equipment and shipping container(s) for
any signs of damage or mishandling. Do not attempt to install the system if damage is apparent.
If any damage is noted, file a damage claim with the shipping agency within 24 hours and contact
Emerson Network Power Liebert Services at 1-800-LIEBERT to inform them of the damage claim
and the condition of the equipment.
2. Compare the contents of the shipment with the bill of lading. Report any missing items to the
carrier and your local Liebert representative immediately.
5
1.2 Internal Inspections
1. Remove any packaging material, then visually examine the UPS and battery equipment for
transit damage, both internally and externally. Report any such damage to the shipper and to
Liebert immediately.
2. Check the nameplate inside the cabinet door to verify that the model number and rating
correspond to the ones specified. Record the model number and serial number in the front of this
installation manual. This information is necessary should service be required.
3. Check for loose connections or unsecured components in the cabinet.
4. Check for shipping damage to internal components.
1.2.1 Storing for Delayed Installation
If the equipment will not be installed immediately, it must be stored indoors where the humidity is no
higher than 90% and the temperature is no higher than 104°F (40°C). The storage area must protect
the Liebert NX from excessive moisture (see 5.2 - UPS Environmental).
CAUTION
!
If the battery cabinet must remain disconnected from power for more than six (6) months, the
battery must be recharged before use. To charge the batteries, the battery cabinet must be
connected to the Liebert NX UPS and the UPS must be connected to utility power and started
up because the charger operates only while the Liebert NX UPS is operating.
CAUTION
!
When batteries are installed in a cabinet adjacent to the UPS unit, the battery—not the
UPS—dictates the designed maximum ambient operating temperature.
Installation
1.3 Preliminary Checks
1.3.1 Identification
The equipment supplied has an identification tag on the back of the main door listing the type and
size of the UPS.
1.4 UPS Location
1.4.1 Positioning the UPS
Choose a location for the UPS that offers:
• Easy connection to inputs, outputs and auxiliary equipment
• Enough space to service the UPS
• Air circulation sufficient to expel heat produced by UPS
• Protection against moisture and excessive humidity
• Protection against dust and other particulate matter
• Compliance with fire prevention regulations and practices
• Operating environment temperature of 74-80°F (23-27°C) for maximum battery efficiency
1.4.2 Environmental Considerations
Before installing the Liebert NX, verify that the UPS room satisfies the environmental conditions
stipulated in 5.2 - UPS Environmental, paying particular attention to the ambient temperature
and air exchange system.
The UPS unit should be installed in a cool, dry, clean-air environment with adequate ventilation to
keep the ambient temperature within the specified operating range 32°F to 104°F (0°C to 40°C).
For optimal UPS and battery system performance and service life, maintain the operating temperature within the range of 74-80°F, (23-27°C).
The Liebert NX UPS cooled by internal fans. Cooling air enters the unit through the front of the unit
and is exhausted out the top. To permit proper air flow and prevent overheating, do NOT block or
cover the ventilation openings or blow air down onto the unit. Ventilation clearance above the unit
must be a minimum of 8 in. (203mm).
See Table 7 for details on heat dissipation.
6
Battery Location
Batteries must be installed in Liebert NX 480V battery cabinets or battery room. Temperature is a
major factor in determining battery life and capacity. Battery manufacturers recommend an operating temperature of 77°F (25°C). Ambient temperatures higher than this reduce battery life; temperatures lower than this reduce battery capacity. In a typical installation, battery temperature should be
maintained between 74°F and 80°F (23-27°C). Batteries should be placed where there are no main
heat sources or air inlets to prevent portions of batteries from being either much warmer or much
cooler than other parts of the batteries.
1.4.3 Special Considerations for Parallel Systems
1. Consider the grounding configuration of your system before finalizing module placement. For
optimal ground performance, the Liebert NX modules should be close together.
2. For optimal load-sharing performance, the UPS output cables should be approximately the same
length, plus or minus 20 percent.
3. Position modules in such a way as to minimize the length of power cables and control wiring
between UPS modules and the paralleling cabinet.
1.5 Considerations in Moving the Liebert NX
Ensure that the UPS weight is within the designated surface weight loading (lb./ft2 or kg/cm2) of any
handling equipment. See Table 7 for weights of various units.
To move the UPS and optional battery cabinets:
• The Liebert NX may be rolled on its casters when moving the unit a short distance. For longer distances, move the UPS with a forklift or similar equipment to ease the relocation and to reduce
vibration.
The optional battery cabinets should be moved with a forklift or similar equipment.
Installation
WARNING
!
Ensure that any equipment that will be used to move the Liebert NX has sufficient lifting
capacity. The Liebert NX weight ranges from 1180 to 2201 lb. (535 to 1000kg). See Table 7 for
details. The UPS presents a tipping hazard. Do not tilt the Liebert NX further than 15
degrees from vertical.
The UPS is fitted with casters—take care to prevent movement when unbolting the
equipment from its shipping pallet. Ensure adequate personnel and lifting equipment are
available when taking the Liebert NX off its shipping pallet. Do not tilt the unit more than 15
degrees from center.
WARNING
!
The casters are strong enough for movement across even surfaces only. Casters may fail if
they are subjected to shock loading, such as being dropped or rolled over holes in the floor or
obstructions. Such failure may cause the unit to tip over, injuring personnel and damaging
the equipment.
Care must be taken when maneuvering cabinets fitted with batteries. Keep such moves to a
minimum. For further information, see Battery Cabinet Precautions on page 2.
Final Position
When the equipment has been finally positioned, ensure that the adjustable stops are set so that the
UPS will remain stationary and stable (see 6.0 - Installation Drawings).
1.6 Mechanical Considerations
The Liebert NX is constructed with a steel frame and removable panels. Top and side panels are
secured to the chassis by screws. The doors may be opened for access to power connections bars, auxiliary terminal blocks and power switches.
The UPS comes with an operator control panel, which provides basic operational status and alarm
information. Cooling is provided by internal fans. The unit sits on four casters. Adjustable stops are
provided to prevent the UPS from moving once it has been moved to its final position.
7
1.6.1 Clearances
There are no ventilation grilles on the sides or rear of the UPS. The unit may be placed with the rear
against a wall and optional cabinets on either side.
To enable routine tightening of power terminations within the UPS, make sure there is sufficient
clearance in front of the Liebert NX to permit free passage of personnel with the door fully opened.
Leave a minimum of 8 in. (203mm) between the top of the UPS and the ceiling to permit adequate air
circulation above the unit. Liebert recommends against using air conditioning or other systems that
blow air onto the top of the unit.
1.6.2 Floor Installation
The diagrams in 6.0 - Installation Drawings show the location of holes in the base plate for bolting
the equipment to the floor.
If the equipment is to be placed on a raised floor, it should be mounted on a pedestal that will support
the equipment point loading. Refer to the cabinet-bottom views in 6.0 - Installation Drawings to
design this pedestal.
1.6.3 Cable Entry
Cables can enter the Liebert NX from the top or bottom. Cable entry is made possible by removing a
metal plate attached to the UPS.
These plates are designed to allow the personnel to punch holes for fitting and securing the conduit.
Once the conduit holes are punched, these plates should be reattached to the UPS.
Installation
CAUTION
!
To reduce the risk of fire, connect only to a circuit provided with correct amperes maximum
branch circuit overcurrent protection (see Table 8) in accordance with the National Electric
Code, ANSI/NFPA 70.
NOTE
When installing the UPS, the customer must provide a disconnect with overcurrent protection
at the output of the UPS.
System Composition
A UPS system can comprise a number of equipment cabinets, depending on the individual system
design requirements—e.g., UPS cabinet with External Bypass cabinet and Maintenance Bypass cabinet. In general, all cabinets used will be the same height and are designed to be positioned side-byside to form an aesthetically appealing equipment suite.
1.6.4 Optional Cabinets
The Maintenance Bypass Cabinet must be cabled and bolted to the Liebert NX before the UPS and
bypass cabinet are moved into their final position. Connect the input wiring to the Maintenance
Bypass Cabinet ONLY after the units are connected and positioned.
Battery cabinets may be bolted to either side of the Liebert NX; see Figure 1.
8
Figure 1 Cabinet arrangement—Liebert NX units and battery cabinets
Front of Units
Battery
Cabinet
Battery
Cabinet
Battery
Cabinet
Liebert
NX
UPS
Front of Units
Battery
Cabinet
Battery
Cabinet
Battery
Cabinet
Liebert
NX
UPS
Front of Units
Multi-Module
Parallel Cabinet
Battery
Cabinet
Battery
Cabinet
Battery
Cabinet
Liebert
NX
UPS
Liebert
NX
UPS
Liebert
NX
UPS
Liebert
NX
UPS
Battery
Cabinet
Front of Units
Front of Units
Battery
Cabinet
Liebert
NX
UPS
Battery
Cabinet
Liebert
NX
UPS
Installation
9
Installation
Front of Units
Liebert NX
Bypass
Distribution
Cabinet
Battery
Cabinet
Liebert
NX
UPS
Front of Units
Liebert NX
Bypass
Distribution
Cabinet
Battery
Cabinet
Battery
Cabinet
Battery
Cabinet
Liebert
NX
UPS
Figure 2 Cabinet arrangement—Liebert NX UPS, battery cabinets and Liebert NX bypass distribution
cabinets
10
2.0 ELECTRICAL CONNECTIONS
The UPS requires both power and control cabling once it has been mechanically installed. All control
cables must run separate from power cables in metal conduits or metal ducts that are electrically
bonded to the metalwork of the cabinets to which they are connected.
WARNING
!
Before connecting input power to the Liebert NX, ensure that you are aware of the location
and operation of the overcurrent protection devices that connect the UPS input/bypass supply
to the power distribution panel.
De-energize and lockout or tagout all incoming high- and low-voltage power circuits before
installing cables or making any electrical connections.
2.1 Power Cabling
2.1.1 Cable Rating
The main factors affecting the choice and size of cable are voltage, current (also taking into account
overcurrent), room temperature and conditions of installation of the cable.
The power cables of the system must be sized with respect to the following description:
• UPS input cables - The UPS input cables must be sized for the maximum input current, including the maximum battery recharge current, given in Table 8, with respect to the unit rating and
the input AC voltage.
• UPS bypass and output cables - The bypass and output cables must be sized for the nominal
output current, given in Table 8, with respect to the unit rating and the output AC voltage.
• Battery cables - When connecting an external battery cabinet, the battery cables must be sized
for the battery discharge current at the end-of-discharge voltage, as given in Table 8, with
respect to the unit rating.
Electrical Connections
NOTE
Table 8 gives nominal currents for determining the size of UPS power cables. Other important
factors to consider include cable route length and coordination with protective devices.
The power cables can be sized to suit the UPS unit rating according to Table 8.
NOTE
When installing a Liebert NX with Softscale
bypass and output cabling for the UPS’s maximum rating. Properly sizing the cable will
reduce the work required to upgrade the UPS.
™
capability Liebert recommends sizing the input,
Lug Size and Torque Requirements
Refer to Table 24 for lug size and torque requirements.
11
2.1.2 UPS Input Configuration
3-Phase
3W + Gnd
3-Phase
3W + Gnd
AC Input
AC Output
3-Phase
3W + Gnd
Battery Cabinet
2W + Gnd
UPS Cabinet
Conv erter
InverterRectifier
Static Bypass
Internal Maintenance Bypass
Figure 3 illustrates the Liebert NX in a split bypass (dual-input) configuration. In this configuration
the Static Bypass and the Maintenance Bypass lines are supplied from a separate feed from the Main
input. Both sources must be protected externally with properly sized protective devices. By default,
the unit ships with internal links installed between the bypass input and main input (Single Input
configuration). To wire the unit as a dual input UPS, remove the links and wire the bypass to the
input bus bars, then wire the Main input directly to CB1 (see Figure 4).
Figure 3 Single module block diagram—dual input configuration
Electrical Connections
2.1.3 Cabling Guidelines
The following are guidelines only and are superseded by local regulations and codes of practice where
applicable. Use wiring rated at 75°C or greater.
1. The ground conductor should be sized in accordance with the input overcurrent protection device
data in Table 8. The ground cable connecting the UPS to the main ground system must follow the
most direct route possible. Control wiring and power wiring must be run in separate conduit.
Output and input cables must be run in separate conduit.
2. Consider using paralleled smaller cables for heavy currents—this can ease installation.
3. When sizing battery cables, a maximum voltage drop of 4VDC is permissible at the current
ratings in UPS terminal. For terminal connection sizing, see Table 8.
4. In most installations, especially parallel multi-module systems, the load equipment is connected
to a distribution network of individually protected busbars fed by the UPS output, rather than
connected directly to the UPS itself. When this is the case, the UPS output cables can be rated to
suit the individual distribution network demands rather than being fully load-rated.
NOTE
If more load is added to the distribution panel, the unit’s cabling must be resized.
5. When laying power cables, do not form coils; this will help avoid increasing formation of
electromagnetic interference.
12
2.1.4 Cable Connections
Rectifier Input
Busbars
(Phases are
indicated by
letters below the
bars)
Output Busbars
(Phases are
indicated by
letters below the
bars)
Battery Input
Connections
Bypass Input Busbars
(Phases are indicated by
letters below the bars)
Ground
Busbar
Rectifier Input
Busbars
(Phases are
indicated by
letters below the
bars)
Output Busbars
(Phases are
indicated by
letters below the
bars)
Battery Input
Connections
Bypass Input Busbars
(Phases are indicated by
letters below the bars)
Ground
Busbar
Liebert NX 40-120kVA Connections
Liebert NX 160-200kVA Connections
The rectifier input, bypass and output are easily accessible from the front of the unit for installation.
All require lug type terminations. They are connected to busbars on the front side of the Liebert NX
and below the circuit breaker, as shown in Figure 4. These busbars are accessible when the front
side panel is removed. Busbars to connect external batteries are accessible from the front of the UPS.
NOTE
External connection access requires removal of a protective panel on the lower front of the UPS.
Figure 4 Input and output busbars
Electrical Connections
NOTE
There is no battery fuse in the UPS; the battery cabinet must include a circuit breaker
to cut off the current in case of short circuit. Refer to Table 8 for current ratings.
13
2.1.5 Safety Ground
The safety ground busbar is located below the Maintenance Bypass circuit breaker or to the right of
the UPS Output breaker for 160-200KVA models as shown in Figure 4. The safety ground cable must
be connected to the ground busbar and bonded to each cabinet in the system.
All cabinets and cable conduit should be grounded in accordance with local regulations.
WARNING
!
Failure to follow proper grounding procedures can result in electric shock hazard to personnel
or the risk of fire, should a ground fault occur.
NOTE
Proper grounding significantly reduces electromagnetic interference problems in systems.
NOTE
The ground busbar is easily accessible when the lower protective cover plate is removed.
2.1.6 Protective Devices
For safety, it is necessary to install circuit breakers in the input AC supply and external battery battery cabinets, external to the UPS system. Given that every installation has its own characteristics,
this section provides guidelines for qualified installation engineers with knowledge of operating practices, regulatory standards and the equipment to be installed.
Electrical Connections
UPS Rectifier and Bypass Input Supply
• Protection from excessive overcurrents and short circuits in power supply input
External overcurrent protection for the AC output circuit is to be provided. See 5.4 - UPS Elec-
trical Characteristics and Table 9 for overload capacity.
When an external battery supply not made by Liebert is used, the customer must provide overcur-
rent protection for the battery circuit.
• Dual Input
When wiring the UPS with dual inputs, the Rectifier input and the Bypass input must be protected separately. Size the breakers according to the input currents shown in Table 8.
2.1.7 Cabling Procedure
CAUTION
!
The operations described in this section must be performed by authorized electricians or
qualified technical personnel. If you have any difficulties, contact your local Liebert
representative or Liebert Services.
NOTE
Hydraulic pressure pliers, combinative tools and piston ring pliers should be used to connect
AC wiring.
Once the equipment has been positioned and secured for operation, and the battery and ground collars have been connected (see 2.1.4 - Cable Connections), connect the power cables as described
below. (Study the reference drawing in 6.0 - Installation Drawings.)
1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or
tagged out before installing cables or making any electrical connections.
2. Remove the front protective cover to gain easier access to the connections busbars.
3. Connect the safety ground and bonding ground bus cables to the copper ground busbar located on
the bottom of the equipment below the power connections. All cabinets in the UPS system must be
connected to the user’s ground connection.
NOTE
The grounding bonding arrangement must comply with the National Electrical Code and all
applicable local codes.
14
Electrical Connections
4. Identify and make power connections with incoming cables according to Steps 5 through 10.
Common Input Connections
5. For common bypass and rectifier inputs, connect the AC input supply cables between the power
distribution panel and the UPS input busbars (A-B-C terminals) and tighten the connections to
88 lb-in. (10 N-m) using the M8 bolt provided.
Dual Input Connections
6. Remove the internal links installed between the Input circuit breaker (CB1) busbars and Bypass
Input busbars as shown in Figure 4.
7. For the bypass, connect the AC input supply cables between the power distribution panel and the
UPS input busbars (A-B-C terminals) and tighten the connections to 88 lb-in. (10 N-m) using the
M8 bolt provided.
8. For the Rectifier Input, connect AC input supply cables between the power distribution panel and
the UPS input circuit breaker (A-B-C terminals).
NOTE
Both the rectifier and bypass feeds MUST come from the same utility source.
Output System Connections—Ensure Correct Phase Rotation
9. Connect the system output cables between the UPS output busbars (A-B-C terminals) and the
critical load and tighten the connections to 88 lb-in. (10 N-m) (M8 bolt).
WARNING
!
If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, then ensure that the system output cables are safely isolated.
Observe the battery cable polarity. Be sure that the battery connector is made with the correct polarity.
10. Refit all protective covers removed for cable installation
Frequency Converter Mode
If a frequency converter configuration is used, connect the AC input supply cables to the rectifier
input busbars (A-B-C terminals). Torque to 88 lb-in (10N-m) for M8 bolts. Ensure correct phase rotation. There will not be any AC bypass supply cables to the bypass input (A-B-C terminals) and tighten
the connections.
NOTE
The operations described in this section must be performed by authorized electricians or
qualified technical personnel. If any difficulties arise, contact Liebert at 1-800-LIEBERT.
NOTE
For frequency converter operation, ensure that the linking busbars between the bypass and the
rectifier input are removed.
15
2.2 Control Cables
X1
User Interface
Board
U1
DSP Control
K1
Key & LED Board
U2
Monitor Board
M3
Parallel Logic
Board
M5
Auxiliary Power
2.2.1 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)
• Liebert IntelliSlot
• Modem interface
• Temperature detect interface
Figure 5 shows the relationship and connection between the monitoring (U2) board and other boards
in the UPS.
Figure 5 Monitor board U2
®
interface
Electrical Connections
16
Figure 6 Auxiliary terminal block detail (Monitoring Board)
NOTE: The black square ()
on each slot indicates Pin 1.
J3
J1
J13 J21 J25 J28 J4 J26 J30 J10
J22
J23
J12
J9
J15
J17
J24
X4
X4
J16
X1
X2
X3
Liebert IntelliSlot 2
Liebert IntelliSlot 1
Liebert IntelliSlot 3
J8
J2
LCD
BFP INV ACF EPO Dry in MBC BCB
X5
X6
X7
PWR
MODEM
SNMP CARD
Electrical Connections
2.3 Dry Contacts
The UPS provides input dry contacts and output dry contacts.
NOTE
When operating the Liebert NX with dry contacts, ESD measures must be taken or the contacts
may be damaged.
17
2.3.1 Input Dry Contacts
+12V
GEN
BtG
ENV
GND
GND
+12V
AUX_I
T_IT
AUX_ 0
T_0T
F_F AN
FUSE
OL
FB
DRV
+12V
+12V+12V
+12V
X3
J4 J26 J30 J10
NOTE: The black square () on each slot indicates Pin 1.
There are several input dry contacts at the X3 slot.
Figure 7 Input dry contacts
Table 1 Input dry contacts at X3
Position Name Description
J4.1 ENV
J4.2 BtG Battery Ground Fault Detection (Normally Closed)
J4.3 GEN
J4.4 +12V +12V Power
1 - Must be configured using 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.
3
1,2
Electrical Connections
Battery Room Alarm (Normally Closed)
Generator Join Detection (Normally Open)
2.3.2 Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 2 Maintenance bypass cabinet interface
Position Name Description
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 (N.C.)
J30.3 T_OT
J30.4 AUX_O Reserved
1
- Must be configured using configuration software before becoming active.
NOTE
All auxillary cables of terminal must be double-insulated. The wire must be 600V, 18-16 AWG
stranded for maximum runs between 82 and 197 feet (25-60m), respectively.
1
Input transformer over temperature (N.C.)
1
Output Transformer Overtemperature (N.C.)
18
2.3.3 Battery Circuit Breaker Control Interface
J25
ACF_O
ACF_S
ACF _C
J21
INV_C
INV_S
INV_O
X1
J13
BFP_C
BFP_S
BF P_O
NOTE: The black square on each slot indicates Pin 1.
J10 is the Battery Circuit Breaker (BCB) box interface.
Table 3 BCB control interface
Position Name Description
J10.1 DRV BCB Driver Signal
J10.2 FB BCB Contact State
J10.3 GND Power Ground
J10.4 OL
BCB On-Line - Input - This pin will become active when
BCB interface is connected. (N.O.)
NOTE
All auxiliary cables of terminal must be double-insulated. The wire must be 600V, 18-16 AWG
stranded for maximum runs between 82 and 197 feet (25-60m), respectively.
2.3.4 Output Dry Contacts
There are three output dry contact relays at the X1 slot (see Figure 8 and Table 4).
Figure 8 Output dry contacts and EPO wiring for firmware before M170
Electrical Connections
Table 4 Output dry contact relays
Position Name Description
J13.2 BFP_O Bypass feedback protection relay. Normally open. 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 Inverter 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.
NOTE
All auxillary cables of terminal must be double-insulated. The wire must be 600V, 18-16 AWG
stranded for maximum runs between 82 and 197 feet (25-60m), respectively.
19
2.3.5 EPO Input—Optional
EPO - NO
EPO - NC
J2 8
X2
NOTE: The black square indicates Pin 1.
The UPS has an Emergency Power Off (EPO) function operated by a button on the control panel or by
a remote contact provided by the user. The local EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 9, is the remote EPO input interface. The EPO has a 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 and 2 or X2: 3 and 4
of the auxiliary terminal block (X2). It also is connected to the Normally Open or Normally Closed
remote stop switch between these two terminals using shielded cable (see Figure 9 and Table 5). If
this function is not used, terminals X2: 3 and 4 must be opened and X2: 1 and 2 must be closed.
Figure 9 EPO wiring
Table 5 EPO input contact relays
Position Name Description
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 shorted to J28.4
J28.4 EPO_NO EPO Activated when shorted to J28.3
Electrical Connections
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 NO contacts.
NOTE
All auxillary cables of terminal must be double-insulated. The wire must be 600V, 18-16 AWG
stranded for maximum runs between 82 and 197 feet (25-60m), respectively.
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3.0 BATTERY INSTALLATION
3.1 Introduction
If using multiple sets of batteries connected in parallel to provide the required battery backup run
times, fit each set with an isolating device to permit working on one of the battery sets while leaving
the others in service and providing backup protection.
When replacing batteries, replace with the same manufacturer and type, or equivalent. See your Liebert representative for a list of approved batteries.
3.2 Safety
Special care should be taken when working with the batteries associated with the Liebert NX system
equipment. When all batteries are connected together, the battery terminal voltage may exceed 480V
and is POTENTIALLY LETHAL.
WARNING
!
The Liebert NX's internal batteries are connected and energized even if the UPS is turned
Off. To minimize the risk of injury, a qualified service person should disconnect the batteries
before any maintenance is performed on the unit.
Servicing of batteries should be performed or supervised only by properly trained and
qualified personnel knowledgeable about batteries and the required precautions.
Battery Installation
When replacing batteries, replace with the same manufacturer and type, or equivalent. See
your local Emerson representative for a list of approved batteries.
A battery can present a risk of electrical shock and high short circuit current. The following
precautions should be observed when working on batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries.
• Disconnect charging source prior to connecting or disconnecting battery terminals.
• Determine if battery is inadvertently grounded. If the battery is inadvertently grounded,
remove source from ground. Contact with any parts of a grounded battery can result in electrical shock. The likelihood of such shock can be reduced if such grounds are removed during installation and maintenance (applicable to equipment and remote battery supplies not
having a grounded supply circuit).
CAUTION
!
Do not dispose of batteries in a fire. They may explode.
CAUTION
!
Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes. It is
toxic.
CAUTION
!
To reduce the risk of fire, connect only to a circuit provided with DC amperes (see Table 12)
maximum branch circuit overcurrent protection in accordance with the National Electric
Code, ANSI/NFPA 70.
NOTE
The maximum available fault current from the battery supply is 8500A and the DC voltage
rating of the battery supply overcurrent protective device that is to be installed near the battery
supply must be at least 600VDC.
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3.3 External Battery Cabinet Installation
Top Cable Entry
Battery Trays
BCB Plate and BCB
Optional Alber BDSi
Data Collection/Load
Module
Optional Alber
BDSi Controller
Module
Liebert 49" Battery Cabinet
Liebert 33" Battery Cabinet
3.3.1 Battery Cabinets
Figure 10 Battery cabinets for Liebert NX
Battery Installation
The same model battery cabinet may be installed in parallel in multiple cabinet strings for additional
capacity. Battery run time depends on the cabinet model, the number of cabinets and the load on the
UPS.
Handling—The battery cabinet has casters to facilitate movement over short distances. The bottoms
of the battery cabinets are reinforced to permit movement by forklift over longer distances.
Inspection—Remove all panels and visually inspect the batteries, bus connections and cabinet for
any damage. Exercise caution: voltage is present within the battery cabinet even before installation.
If there are signs of damage, do not proceed. Call Liebert Services at 1-800-542-2378.
Storage—The batteries can be stored for up to six months without appreciable deterioration. If planning to store a battery cabinet for longer than six months or at temperatures higher than 77°F (25°C),
contact Liebert Services for recommended precautions.
CAUTION
!
Any battery system should be installed by properly trained and qualified personnel.
When installing an external battery cabinet that is NOT a Liebert NX battery cabinet, the customer
must provide overcurrent protection. See Table 8 for sizing of protection devices.
NOTE
When using an external battery supply that is not provided by Liebert, refer to the battery
manufacturer’s installation manual for battery installation and maintenance instructions,
available on the manufacturer’s Web site.
NOTE
When replacing batteries, Liebert recommends that the all batteries in external cabinets be the
same type. See Table 11 for a list of batteries that are approved for use with this product.
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