Liebert EMERSON NX 1+1 user manual

Summary of the content on the page No. 1

LIEBERT NX 1+1 SYSTEM
PRODUCT SPECIFICATION AND INSTALLATION SHEET
+
5. The parallel logic cable and load sharing cable
General
must be connected in a ring correctly (See
The Liebert NX UPS uses intelligent and reliable
Figure 2)
decentralized technology to achieve parallel opera-
tion of two modules of the same rating. Features of Parallel System
The 1+1 system is used to: 1. The hardware and firmware for parallel UPS
module operation is standard in the Liebert NX,
• Increase the reliabili

Summary of the content on the page No. 2

Figure 1 '1+1' System block diagram NN Supplied by Others Input Utility Input Utility Supply A B C Supply A B C UPS1 UPS2 CB1 CB1 Rectifier Rectifier SW1-C SW1-C Fuse Fuse Static Static Switch Switch Charger Charger Battery 1 Battery 2 SW1-D SW1-D Inverter Inverter SW1-A SW1-A A B C A B C Q1EXT Q2EXT QUPS QBYP Distribution Panel To Load • Bypass Mode Operation Operating Principles The condition to transfer to bypass mode is the Redundancy Paralleling same as that for a single module system. T

Summary of the content on the page No. 3

Figure 2 Connecting 1+1 system parallel control Installation cables The basic installation procedure of parallel system is the same as that of single module system. The fol- 1 2 lowing sections only introduce the installation proce- #1 UPS Module #2 UPS Module dures specific to the parallel system. Cabinet Installation Parallel Board Parallel Board X5 Parallel system composed of two UPS modules X4 X4 The two UPS modules that will form the 1+1 system X2-1 X2-2 X2-1 X2-2 should be placed side-b

Summary of the content on the page No. 4

if they get failure during operation. For 1+1 sys- NOTE tems, this settings needs to be set to 1. If one module cannot transfer to inverter NOTE mode long after its inverter is on, its output connection may not be good or its output The settings should be the same for all phase rotation may not be coincident with modules within the parallel system, except other modules. At this time, the LCD for the the UPS ID No. UPS module will display “inverter System Startup asynchronous” and the in