Multipolar DC molded case circuit breaker
A technology for plastic shells and circuit breakers, which is applied to circuit breaker parts, circuit breaker contacts, circuits, etc., can solve the problems of difficult to break DC fault arcs and operating voltages, and achieve low arc and operating voltages and improved Rated working voltage, compact structure
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[0014] according to Figure 1~4 The specific structure of the present invention will be described in detail. The multi-pole DC plastic case circuit breaker is improved on the basis of the structure of the single break point contact system of the existing AC plastic case circuit breaker. The contact system in each breakpoint is mainly composed of moving contact 8 and static contact 6, overload protection release, short circuit protection release, terminal board 4, arc extinguishing chamber 9 of each pole and permanent magnet magnetic blower. Arc extinguishing mechanism. The specifications of the main components should meet the requirements of relevant standards, and the shell is made of bulk molding compound (DMC, also known as unsaturated polyester bulk molding compound). The permanent magnet magnetic blowing arc extinguishing mechanism includes a permanent magnet 2 and two magnetic guide plates 5, which are arranged at a single break point between the moving contact 8 and t...
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