Emerson Liebert NX User Manual Page 111
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Operating Instructions
Liebert
®
NX
™
101
13. Close the CB5 Output Breaker.
14. Close the external battery breaker(s).
15. Verify the Battery Alarm LED extinguishes.
16. Open theCB3 Maintenance Bypass Breaker.
17. On the Control Panel, press the INVERTER ON button for 2 seconds.
18. Verify that the Inverter LED turns solid green, and that the unit indicates Normal Mode after
about a minute.
11.7 Auto Restart
When the main and bypass sources fail, the UPS draws power from the battery system to supply the
load until the batteries are depleted. When the UPS reaches its end of discharge (EOD) threshold, it
will shut down.
The UPS will automatically restart and enable output power:
• after utility power is restored
• if “Auto Recovery after EOD Enabling” is enabled
• after the “Auto Recovery after EOD Delay Time” expires (the default delay is 10 minutes)
During the auto recovery delay, the Liebert NX will be charging its batteries to provide a safety
margin for equipment shutdown if input power fails again.
If the “Auto Recovery after EOD Enabling” feature is disabled, the user must restart the system
manually.
11.8 Emergency Shutdown With EPO
This circuit has been designed to switch off the UPS in emergency conditions (i.e., fire, flood, etc.). The
system will turn off the rectifier and inverter and will stop powering the load immediately (including
the inverter and bypass), and the battery stops charging or discharging. If a Liebert NX battery
cabinet is connected, the circuit breaker in the battery cabinet will shunt trip open.
If input utility power is present, the UPS’s controls will remain active; however, the output will be
turned off. To remove all power from the UPS, open the external feeder breaker.
11.9 Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions
Once all appropriate measures have been taken to correct the problem indicated by the alarm
message appearing on the operator control panel display, carry out this procedure to restore the UPS
to regular operation following an EPO action or for the following reasons: Inverter Overtemperature,
Cut-off Overload, Battery Overvoltage, excessive switching (BYP: XFER COUNT BLOCK), etc.
When the user confirms that the fault is cleared:
1. Press the FAULT CLEAR button to let the system exit the emergency-off state.
2. Press the INVERTER ON button on the right side of the operator control panel for longer than
2 seconds.
NOTE
The rectifier will start again, and the bypass will begin to power the load. The Rectifier
indicator flashes while the rectifier is starting up. When the rectifier enters the normal
operation state (about 30 seconds), the rectifier indicator turns green.
NOTE
The rectifier will automatically turn on 5 minutes after the Inverter Overtemp alarm has
cleared.
- 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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