FIELD: electrical engineering.
SUBSTANCE: invention is related to protective commutation equipment and may be used for overload and short-circuit protections of electric plants and line of alternating and direct current. Breaker consists of frame, movable and fixed contacts, turning retaining electromagnet, disconnecting spring, contact force spring and electromagnetic connecting mechanism. Breaker is equipped with limiter of magnet core turn of retaining electromagnet for provision of gap with its anchor in disconnected position of breaker. Retaining electromagnet is connecting for selection of specified gap during breaker connection.
EFFECT: increase of contacts opening without increase of breaker power and/or dimensions.
3 cl, 4 dwg
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