PB - Switching Interlock Relay
The device eliminates erroneous energised earthing switches in MV switchgear and transformer stations. It is particularly recommended in fields where there is a possibility of reverse voltage (transformer, coupling and feeder fields).
Can be used with both reactance and resistance voltage dividers. Allows remote control of earthing switch activation.
The use of PB ensures the elimination of erroneous earthing switch activations, thus excluding the occurrence of arcing dangerous to people and equipment.