Fault current protection switch has fault current present signal derived from redundant and/or diversity unit that does not load transducer or that only loads it slightly

摘要

The protection switch (2) interrupts the main current lines irreversibly, or so that only a skilled person can reverse it, within a defined time using a redundant and/or diversity auxiliary break point in the event of loss of protection function in a fault current situation. The signal fault current present is not derived from the trigger circuit, but from a redundant and/or diversity unit (6) that does not load the transducer or that only loads it slightly