Liebert NXC 40kVA - Chapter 1 Overview; Features and Design Concept; Operation Modes; Battery Management and Protection

Contents
Chapter 1 Overview ............................................................................................................................................................ 1
1.1 Features ................................................................................................................................................................ 1
1.2 Design Concept .................................................................................................................................................... 1
1.2.1 System Design .......................................................................................................................................... 1
1.2.2 Bypass ....................................................................................................................................................... 2
1.2.3 System Control Principle ........................................................................................................................... 2
1.2.4 UPS Power Supply Switch Configuration .................................................................................................. 3
1.2.5 Battery Circuit Breaker (BCB) .................................................................................................................... 4
1.3 Parallel System ..................................................................................................................................................... 4
1.3.1 Parallel System Features........................................................................................................................... 4
1.3.2 Parallel System Requirements .................................................................................................................. 4
1.4 Operation Modes .................................................................................................................................................. 5
1.5 Battery Management ............................................................................................................................................. 7
1.5.1 Normal Function ........................................................................................................................................ 7
1.5.2 Advanced Function .................................................................................................................................... 8
1.5.3 Battery Temperature Compensation .......................................................................................................... 8
1.6 Battery Protection ................................................................................................................................................. 8
Chapter 2 Mechanical Installation ....................................................................................................................................... 9
2.1 Precautions ........................................................................................................................................................... 9
2.2 Transportation ....................................................................................................................................................... 9
2.3 Unpacking ............................................................................................................................................................. 9
2.4 Initial Inspection .................................................................................................................................................. 11
2.5 Environmental Requirement ............................................................................................................................... 11
2.5.1 UPS Location Selection ........................................................................................................................... 11
2.5.2 Battery Location Selection ....................................................................................................................... 12
2.5.3 Storage .................................................................................................................................................... 12
2.6 Mechanical Requirement .................................................................................................................................... 12
2.6.1 Moving Cabinet ........................................................................................................................................ 12
2.6.2 Clearance ................................................................................................................................................ 12
2.6.3 Cable Access Mode ................................................................................................................................. 13
2.6.4 Final Positioning And Fixing .................................................................................................................... 13
2.7 Installation Drawings ........................................................................................................................................... 13
Chapter 3 Electrical Installation ......................................................................................................................................... 15
3.1 Wiring Of Power Cable ....................................................................................................................................... 15
3.1.1 System Configuration .............................................................................................................................. 15
3.1.2 Maximum Steady State AC And DC Currents ......................................................................................... 15
3.1.3 CSA Of UPS Cable .................................................................................................................................. 16
3.1.4 Selection Of UPS I/O Switch ................................................................................................................... 16
3.1.5 Distance Between The UPS Connection Point And The Floor ................................................................ 16
3.1.6 Notes ....................................................................................................................................................... 16
3.1.7 Power Cable Connecting Terminal .......................................................................................................... 16