Battery cabinet automatic disengagement device principle

What causes a tripping unit to disconnect a battery?

These conditions can vary from a sudden battery under voltage to a trigger of specific alarms inside the UPS (i.e. a desaturation of a semiconductor device). These devices, thru a proper interface circuit, command the tripping unit of the BCB to disconnect the battery.

Can a protection device trip a battery?

The selected protection device must trip in case of a fault in less than 100 ms. In case the fault current provided by the battery does not allow for the finding of protection devices, such as a Circuit Breaker or fuse, that meets the derating criteria stated in point B, it is hence possible to increase the multiplier up to 0.7.

How a battery protection device should be sized?

A protection device must be sized properly so that the energy flowing from the batteries during the failure will not cause damage to the batteries or other components along the short circuit path. The protection must clear the fault in less than 100 milliseconds. The impedance of the line is mainly resistance and inductance.

Which safety cabinets are considered storage sections according to TRGs 510?

Safety cabinets tested in accordance with DIN EN 14470-1 or DIN EN 1363-1 with a fire resistance of 90 minutes (Type 90) are considered storage sections according to TRGS 510.

What is a DC rated battery circuit breaker (BCB)?

The DC rated Battery Circuit Breaker (BCB) provides still overcurrent protection, if correctly coordinated, even though it is not as fast as the fuses. These breakers must be set at a safe intervention value based on the battery short circuit current.

How do I activate a remote battery trip signal?

There are several events controlled by the UPS control that can activate the remote battery trip signal: Battery End Of Discharge (EOD). Once the battery reaches the EOD voltage and the inverter is turned of, after a specific time delay the booster is turned of.