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4.6 Battery Circuit Breaker Boxes
The battery circuit breaker box house the battery circuit breaker and
its controller board as shown in figure 4-10. It is used to connect the
battery to the UPS in Installations where the batteries are not
contained in the standard battery cabinet.
There are two boxes available which are similar in their design and
content. These are listed below :
* 100A C/B # 270141030400
* 160A C/B # 270141060400
Usually the 'box' is fitted as close as possible to the batteries. Batteries
circuit breaker boxes must be earthed. The connections are similar to
the connections made to the battery cabinet as shown in figure 4-10
and chapter 3.
As a safety precaution, remove the battery fuse in the UPS before
making the battery circuit breaker power connections.
The battery circuit breaker box offers the following features
• Undervoltage cut-off controlled by the UPS.
• Low battery safety cut-off.
• Battery circuit breaker status information to the UPS.
• Over current protection.
• Three pole circuit breaker - which can be connected in either
a 'Double positive' pole method or the 'half potential
method'.
4.6.1 Temperature Sensor Board 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 monitored by a remote
temperature sensor). This prevents the battery being over charged at
high ambient temperatures.
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