MOLD CASED CIRCUIT BREAKER

摘要

PURPOSE: A mold cased circuit breaker is provided to minimize moment difference between a pair of shaft pins by connecting one pair of shaft pins by a crank. CONSTITUTION: A mold cased circuit breaker includes a plurality of unipolar breaking units(30), a shaft, and one pair of shaft pins. The shaft rotatably supports the movable contact in each unipolar circuit breaker. One pair of shaft pins pass through the shaft. A crank(35) is connected between one pair of shaft pins and a connection shaft. The connection shaft is connected to the shaft for directly transmitting the rotation force by one pair of the shaft pins to the shaft.