4 User Manual 10H52192UM60 - Rev. 1 - 09/2011
Liebert NX Contents
2.3.1 Overview..................................................................................................................................................23
2.3.2 Installing the Batteries .............................................................................................................................23
2.3.3 Connecting the Batteries .........................................................................................................................23
2.4 Battery Maintenance...........................................................................................................................................25
2.5 Battery Recycling................................................................................................................................................25
2.6 Reference Current and Connection of External BCB..........................................................................................26
Chapter 3 Installing Parallel Systems................................................................................................................................28
3.1 Overview.............................................................................................................................................................28
3.2 1 + N Parallel System .........................................................................................................................................28
3.2.1 Installing the Cabinet...............................................................................................................................28
3.2.2 External Protective Device.......................................................................................................................29
3.2.3 Power Cable............................................................................................................................................29
3.2.4 Auxiliary Control Wiring ...........................................................................................................................30
3.2.5 Parallel Control Cables............................................................................................................................30
3.3 Dual Bus System ................................................................................................................................................31
3.3.1 Installing the Cabinet...............................................................................................................................31
3.3.2 External Protective Device.......................................................................................................................31
3.3.3 Power Cable............................................................................................................................................31
3.3.4 Control Cable...........................................................................................................................................31
Chapter 4 Operation..........................................................................................................................................................33
4.1 Brief Introduction.................................................................................................................................................33
4.1.1 Operating Theory.....................................................................................................................................33
4.1.2 Static Transfer Switch..............................................................................................................................34
4.2 1 + N Parallel System .........................................................................................................................................34
4.2.1 Parallel System Features.........................................................................................................................34
4.2.2 Requirements for Paralleling UPS Modules.............................................................................................34
4.3 Operating Mode..................................................................................................................................................34
4.3.1 Normal Mode...........................................................................................................................................35
4.3.2 Battery Mode...........................................................................................................................................35
4.3.3 Automatic Restart Mode..........................................................................................................................35
4.3.4 Bypass Mode...........................................................................................................................................35
4.3.5 Maintenance Mode (Manual Bypass) ......................................................................................................35
4.3.6 Parallel Redundancy Mode (System Expansion).....................................................................................35
4.4 Battery Management (Set Up During Commissioning) .......................................................................................35
4.4.1 Normal Function......................................................................................................................................35
4.4.2 Advanced Function..................................................................................................................................36
4.5 Battery Protection (Set Up by Commissioning Engineer)....................................................................................36
Chapter 5 Operator Control and Display Panel.................................................................................................................37
5.1 Introduction.........................................................................................................................................................37
5.1.1 Indicators.................................................................................................................................................37
