Emerson Liebert NX User Manual Page 112
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Operating Instructions
102 Liebert
®
NX
™
After the EPO button is pressed, if the input utility is removed, the UPS will shut down completely.
When input utility is returned, if the Bypass input circuit breaker (CB2) and UPS output circuit
breaker (CB5) are closed, the UPS will start up on Bypass. There will be power at the output
terminals of the UPS.
11.10 Battery Protection
11.10.1Battery Undervoltage Pre-Warning
Before the end of discharge, the Liebert NX displays a Low Battery pre-warning. After this pre-
warning, the battery has the capacity for 5 minutes discharging with full load (default time). The
Liebert NX can be user-configured to display this warning from 3 to 60 minutes before end-of-
discharge.
11.10.2Battery End-of-Discharge (EOD) Protection
If the battery voltage is lower than the end-of-discharge voltage, the battery converter will be shut
down.
11.11 Multi-Module System Procedures
11.11.1Isolating One Module in a Multi-Module System
1. Turn Off the inverter.
2. Open External Output CB4 in Parallel Cabinet (see Figure 67).
The UPS enters Isolation Status automatically, parallel signaling and communication become
masked and output becomes inhibited.
3. Power Off the unit for maintenance.
4. Power On the unit.
5. Unit enters Test Mode by configuration software setting.
6. Diagnosis or testing.
7. The UPS exits Test Mode by configuration software setting.
Output becomes inhibited because of Isolation Status.
8. Return all switches to the Normal position.
9. Close External Output CB4 in Parallel Cabinet (see Figure 67).
The UPS exits Isolation Status automatically, parallel signaling and communication recovers,
output becomes enabled but interlocking works now.
10. Turn On inverter and join the parallel system.
!
WARNING
Risk of electrical shock. Can cause injury and death.
If the internal maintenance bypass circuit breaker (CB3) is closed and input utility is present,
there will be power at the output terminals of the UPS.
- 2
- TABLE OF CONTENTS 3
- 7.0 LIEBERT BDC 4
- SAVE THESE INSTRUCTIONS 11
- 2Liebert 12
- Battery Cabinet Precautions 13
- 4Liebert 14
- GLOSSARY OF SYMBOLS 15
- 1.0 INTRODUCTION 16
- 2.0 INSTALLATION 17
- 2.3 Preliminary Checks 18
- 2.4 UPS Location 18
- Battery Location 19
- Final Position 19
- 2.6 Mechanical Considerations 20
- 2.6.4 Optional Cabinets 21
- Installation 22
- 12 Liebert 22
- 3.0 ELECTRICAL CONNECTIONS 23
- 3.1.2 UPS Input Configuration 24
- 3.1.3 Cabling Guidelines 24
- 3.1.4 Cable Connections 25
- 3.1.5 Safety Ground 25
- 3.1.6 Protective Devices 25
- 3.1.7 Cabling Procedure 26
- Common Input Connections 26
- Dual Input Connections 26
- Frequency Converter Mode 27
- 3.2 Control Cables 28
- 3.3 Dry Contacts 30
- 3.3.4 Output Dry Contacts 31
- EPO - NO 32
- EPO - NC 32
- 4.0 BATTERY INSTALLATION 33
- 4.3.1 Battery Cabinets 34
- 4.4 Non-Standard Batteries 36
- 4.5 BCB Shunt Trip 37
- 5.0 OPTIONS 38
- LBS Cable 39
- 5.2.1 General 40
- 480V, 3W 41
- System Input 41
- System Output 41
- 5.2.3 Operating Principles 42
- Redundancy Paralleling 42
- 5.2.4 Operation Modes Summary 42
- 5.3.2 Cabinet Installation 43
- 5.3.3 Preliminary Checks 43
- 5.3.4 Power Cables 43
- 5.3.5 Parallel Control Cables 43
- Auxiliary Dry Contact Cables 44
- 6.0 UPS SPECIFICATIONS 46
- Table 8 UPS terminal 47
- 6.4.1 Input Rectifier 48
- 6.4.2 DC Intermediate Circuit 49
- 6.4.3 Inverter Output 50
- 6.4.4 Bypass Input 50
- 7.2 Maintenance Mode 52
- 7.3 Locating the Cabinet 52
- 7.4 Cable Installation 52
- 7.4.3 Input/Output Wiring 53
- Isolation 55
- Transformer 55
- Wiring Legend 55
- 7.5 Bolting Cabinets Together 59
- 47" cabinet 60
- NSTALLATION DRAWINGS 61
- U3819205 62
- Source: U3819611, Rev. 0 63
- Source: U3819621, Rev. 1 64
- Installation Drawings 65
- 56 Liebert 66
- FRONT VIEW LEFT VIEW 67
- Front of UPS 68
- BOTTOM VIEW 68
- TOP VIEW 68
- DETAIL A 70
- (8.83") 71
- 62 Liebert 72
- DETAIL B 73
- 64 Liebert 74
- Detail B 75
- Top View 75
- (without BCB Cover Plate) 75
- Detail A 75
- Right Side 78
- 70 Liebert 80
- Without Covers 81
- 72 Liebert 82
- With Door Open 84
- Door Open 85
- 76 Liebert 86
- 9.0 OPERATION 87
- 9.1.1 Bypass Supplies 88
- 9.1.2 Operating Modes 88
- Normal Mode 88
- Battery Mode 88
- Bypass Mode 88
- Maintenance Mode 89
- Eco Mode 89
- 10.1 Operator Control Panel 90
- 10.2 Mimic Display Indicators 91
- 10.3 Control Buttons 92
- 10.4 Audible Buzzer 93
- 10.5 LCD Overview 93
- 10.6 Navigation Keys 94
- 10.7 UPS System Information 94
- 10.8 LCD Menus and Data Items 95
- Figure 58 Menu tree 96
- 10.9 Language Selection 98
- 10.10 Current Date and Time 98
- Figure 60 Set date and time 99
- 10.11 UPS Status Messages 100
- 10.12 Types of LCD Screens 101
- 10.12.3UPS Help Screen 102
- 10.12.4Screen Saver Window 102
- 10.13 Pop-Up Windows 103
- 11.0 OPERATING INSTRUCTIONS 104
- 11.2 UPS Startup 105
- F2 F4F1 F3 HELP 106
- Operating Instructions 107
- 98 Liebert 108
- 100 Liebert 110
- 11.7 Auto Restart 111
- 11.10 Battery Protection 112
- 11.13 Parallel System Startup 115
- 12.0 OPTIONS 116
- 12.1.5 Configuring Baud Rates 117
- Relay Card 118
- 12.3 Replacing Dust Filters 119
- 13.4 Battery Run Times 124
- 116 Liebert 126
- PPENDIX A-UPS STATUS MESSAGES 127
- Table 49 UPS status messages 128
- Technical Support / Service 132
- Locations 132
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