Emerson 40-200KVA Mode D'Emploi

The Liebert NX battery cabinet has the shunt trip installed in the circuit breaker. When a DC ground 

fault (using the optional DC Ground Fault kit), a battery overtemperature or EPO is activated, the 

shunt trip will open the circuit breaker.

The Liebert

®

 matching battery cabinet allows installing an optional Alber

®

 battery monitoring system 

in the cabinet. The Alber Battery Monitoring by Liebert continuously checks all critical battery 

parameters, such as cell voltage, overall string voltage, current and temperature. Automatic periodic 

tests of internal resistance of each battery will verify the battery’s operating integrity. Additional 

capabilities include automatic internal DC resistance tests and trend analysis providing the ability to 

analyze performance and aid in troubleshooting.
The Alber monitoring system is installed inside the battery cabinet (see Figure 9). The monitoring 

system requires approximately 0.5A, single-phase 480V.

This power can come from the output terminals of the UPS, a distribution panel, or another 

UPS-protected source. This power is to be field supplied. See Figure 37 for wiring location.
For details about operating the Alber system, see the Alber Monitoring System manual.