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The opening time of movable contact has remarkable effect on the limiting current performance of low voltage molded case circuit breakers.
触头打开时间对于低压塑壳式断路器的限流性能有重要意义。
Molded case circuit breakers usually contain thermal-magnetic trip units, although larger sizes can be equipped with solid state trip sensors.
塑壳断路器通常含有热磁跳脱单元，而大型号的塑壳断路器会配备固态跳脱传感器。
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