| 摘要 |
electrical engineering. SUBSTANCE: circuit breaker has case and cover, trip-free mechanism with rack, contact system with arc-control chambers, thermal and electromagnetic overcurrent releases in each pole; in addition, thermal release is electrically connected to electromagnetic release and the latter, to movable contact of contact system by means of flexible conductor; conductor of each pole is divided into two parallel conductors one being fixed to one of releases. Novelty is that second parallel conductor is fixed to heat-sensing member of thermal release. EFFECT: improved stability of heat-sensing member temperature conditions and, hence, improved operating reliability of release. 4 cl, 3 dwg
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