FIELD: electrical engineering; controlling three-pole or multipole high-voltage switches.
SUBSTANCE: proposed device has ON- and OFF-operation control electromagnets incorporating provision for overtemperature protection in case of switch failure, two mutually inverted auxiliary contacts, positive and negative leads for connection to on-line power supply with first and second circuits connected in parallel in-between, two transistorized-output solid-sate relays, two diodes, two OR gates, two AND gates, four NOT gates, and two delay circuits.
EFFECT: provision for overheat protection of control electromagnets, interlocking in case of multiple switch closure while monitoring closing and opening circuits.
1 cl, 1 dwg
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