Chapter 2 - Installation Procedure Liebert Hipulse E Installation Manual
Installation (Electrical) Single or '1+N' UPS System
Page 2-10 (07/04)
2.3 Control cables
2.3.1 Battery Control
The battery circuit breaker is controlled by the battery circuit breaker controller board, which is located within the
battery cabinet — or adjacent to the battery circuit breaker when the batteries are rack-mounted. This board controls the
circuit breaker's undervolt release coil and also provides a path for the circuit breaker auxiliary contacts to signal the
circuit breaker status back to the UPS control logic. All connections between the controller board and the UPS module
are made via the auxiliary terminal block (X3), which is located in the base of the UPS cabinet.
Figure 2-1 Auxiliary terminal block detail
Connect the battery circuit breaker control and temperature compensation cables between the UPS auxiliary terminal
block and battery circuit breaker controller board as shown in figure 2-1. These cable must be shielded and double
insulated, shield should be connected at protective earth of battery cabinet or battery breaker, not at UPS.
Caution
If battery temperature compensation is not used the system must be de-activated by the commissioning engineer.
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