Turn-off device for turning off at the minimum voltage

摘要

A turn-off device (1) for turning off at the minimum voltage of a type which is assigned turn-off kinematics of a protective switching contactor (20) of modular construction which is installed in an electrical cable (lead, line) (2) and contains an operating relay with an armature (12) which operates the said kinematics as a consequence of the reduction in the supply voltage in the cable (2) comprises an electronic control circuit (14) which is connected between a conductor (F), which carries phase voltage, of the cable (2) and the relay (3), and a first (18) circuit part for regulating the response threshold of the device, as well as a second (19) circuit part for definition of a response delay. <IMAGE>