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Installation Drawings
58
Figure 41 Interconnecting details for Liebert NX 40-120kVA UPS to paralleling cabinet with input, bypass
and distribution circuit breakers
FRONT
Without Covers
REAR
Without Covers
FRONT
With Door Open
E1-E4, F
B1-B4
A
D
B1-B4
E1-E4
C1-C4
G1-G4,
H1-H4
G1-G4,
H1-H4
C1-C4
Run From To Conductors
A Utility Source Parallel Cabinet Ph A, B, C - System Input
B1-B4 Parallel Cabinet
UPS #1-UPS #4 Module
AC Input
Ph A, B, C - UPS Inputs
C1-C4
UPS #1-UPS #4 Module
AC Output
Parallel Cabinet Ph A, B, C - UPS Outputs
D Parallel Cabinet Critical Loads Ph A, B, C - System Outputs
E1-E4 Parallel Cabinet
UPS #1-UPS #4 Module
Gnd
Ground - UPS
F Parallel Cabinet Building Gnd Ground - System
G1-G4 Parallel Cabinet
UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)
Output Breaker Aux Contact
H1-H4 Parallel Cabinet
UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)
UPS Bypass Detection