ABB Terra 53 Operator's Manual page 30

The AC charge power group is protected for earth faults by a type B RCD (I). The maximum current
which can be used by the car is protected by an MCB (J).
An AC relay (K) switches the power to the car. This relay is controlled via a safety circuit by:
• Emergency stop button
• Earth leakage detection
• Door switch
• Software
30 | Terra 53/23 Charging Station User and Operator Guide version 1.0