Isolation relay as well as a method for operating an isolating relay

摘要

The present invention relates to an isolating relay circuit, in particular for separating of a star point of a multiphase electric motor, comprising a load (2; 23) for operating over a plurality of supply lines (3, 4; 21, 22); an electronic isolation relay with one or more switching transistors (u4, u5), in order to produce an electric node (k) at the load (2, 23) or to construct these separate; and a control circuit (6, 27, 28, 29) for driving the isolating relay (5, 26), as a function of an electrical state on at least one or more supply lines (3, 4; 21, 22).