Coil circuit e.g. for electromechanical switching devices, includes switching unit with interface for opening switching unit when working voltage fails to achieve limiting level

摘要

A coil circuit has a diode unit (1) with parallel connected coil circuit with working coil (2) and a circuit switching unit (3) which is provided with an interface (7) by which the switching unit is opened when, and as soon as, a working voltage (U) at the coil series circuit fails to reach a limiting level (UG).