Current relay with differentially operating contact breaker - has movable armature with quick action tripping mechanism and relay circuits in cascade

摘要

The current relay is of the type comprising an electromagnet (15) whose coil (16) carries the control current and whose magnetic circuit consists of a movable armature (22), a contact breaker (32) controlled by the armture, the contact breaker associated with a suitable breaker (35) having a quick action tripping mechanism (37) which causes the contact breaker and the component part of the drive (38) to operate differentially. The installation includes a cascade of circuits operating on a non-priority basis with a coil for each relay having a current carrying capacity appropriate to the relay immediately in advance of the one in question.