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 S ystems ................................................................................................................................ 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
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