prEN 50XXX

Terminal markings for auxiliary and control circuits of circuit breakers, disconnectors and earthing switches for rated voltages superior or equal to 52 kV.

Scope

This standard applies to terminal markings for auxiliary and control circuits of high voltage circuit breakers, disconnectors and earthing switches for rated voltages superior or equal to 52 kV, performed air-insulated for indoor and outdoor installation as well as to corresponding devices in enclosed switchgear and controlgear, the auxiliary and control circuits of which are connected by terminals and not by plugs