Miniature Circuit Breaker in the Household Distribution

In the event of a grid failure, the battery inverter creates a battery-backup grid (TN-S grid configuration). Therefore, only the battery inverter can trip circuit breakers and residual-current devices in the household distribution in case of a grid failure. The residual-current device in the automatic transfer switching device is not able to do that. It only protects the battery inverter in parallel grid operation.

The miniature circuit breakers in the household distribution should therefore comply with the maximum tripping characteristics listed for the battery inverter.

If circuit breakers are installed up to the mentioned tripping characteristic, the battery inverter is able to fulfill the required automatic disconnection of supply with the respective disconnection times in accordance with VDE 0100-410. If a circuit breaker has a higher tripping characteristic, an additional residual-current device of type A must be installed in the loads distribution. In doing so, an already existing residual-current device of type A can also be used (for further information also see VDE-AR-E 2510-2).

Sunny Island

Sunny Boy Smart Energy

Sunny Tripower Smart Energy

In the Sunny Tripower Smart Energy hybrid inverter, software-based algorithms prevent impermissible overcurrent.

Also see:

• Requirements of VDE Application Guide 2510-2