ELECTROMAGNETIC REED RELAY Russian patent published in 1997 - IPC

FIELD: electrical engineering; railway automatic-control systems. SUBSTANCE: relay has core with control winding, magnetic circuit, one or more hermetically sealed contacts; novelty is new proportion of main design characteristics: number of turns, winding active resistance, magnetic circuit conductivity, magnetomotive pull-in and drop-out force so that coil turn-on transient current, upon crossing relay operating threshold, does not cross its drop-out threshold. In the action, short-time breaking of contacts in the course of relay energizing is eliminated. EFFECT: improved service life of relay, increased maximum permissible current handled by relay contacts, eliminated false additional pulse across contact. 2 dwg