Battery Circuit Breaker Boxes; Temperature Sensor Board (4532029 V) - Liebert 7200 Series User Manual

7200 Series UPS User Manual
Single Module and 1+1 Parallel System
4.6

Battery circuit breaker boxes

The boxes contain a battery isolating circuit-breaker and the Control board part no. 4520067 T as also
mounted in the Battery Cabinets.
The circuit-breaker boxes are designed for wall mounting, when the circuit-breaker is not installed in
special cabinets, and must be located near the battery.
An earth connection must be provided.
Two boxes are available depending on the UPS power rating:
• part no. 4641027 B with 100 A Circuit-breaker for 30 - 40 kVA UPS.
• part no. 4641028 C with 160 A Circuit-breaker for 60 kVA UPS.
The circuit-breaker includes magnetic overcurrent protection and an undervoltage tripping release. It
offers the following features:
• battery isolation for safety
• short-circuit protection
• circuit-breaker automatic opening when the Inverter is locked out due to battery
undervoltage, thus avoiding damaging discharges to the battery
• circuit-breaker remote breaking action using the emergency stop button, if installed
• protection against operating errors (closing the circuit-breaker with the Rectifier disabled )
• protection against Battery cabinet and UPS connection errors ( polarity reversal +/-)
• Figure 4-13 indicates the connections between the UPS and the Battery circuit-breaker Box.
4.6.1

Temperature Sensor Board (4532029 V)

With this feature fitted and enable the nominal float voltage supplied to the battery is adjusted so as
to be inversely proportional to the ambient battery cabinet/room temperature (as monotored by a
remote temperature sensor). This prevents the battery being over charged at high ambient
temperatures.
document in response to "powersure ups"
Chapter 4 - Optional equipment
Battery circuit breaker boxes
Page 4-17
Issue 6
(03/98)