Development Direction of Molded Case Circuit Breaker

    Molded Case Circuit Breaker (MCCB)

    The new generation of plastic case circuit breaker has made great breakthroughs in product structure, operation mechanism, contact arc extinguishing system, adjustable thermal magnetic release and electronic release technology compared with the old generation of plastic case circuit breaker, which has greatly improved the comprehensive technical and economic indicators of the product. The development of new generation plastic case circuit breaker pays great attention to reducing the volume and improving the technical performance index, so the new double breakpoint breaking technology has been paid more and more attention.

    With the improvement of short circuit breaking ability, many products have realized Ics=Icu. Some series of products have Icw specifications for high current grade, which makes it possible to realize selective protection between upper and lower levels of plastic case circuit breakers. Many new generation products are not only greatly reduced in volume, but also have a decreasing trend in shelf grade. With the reduction of volume and cost of electronic release, it is obvious that electronic release is used in the whole series. The protective performance of plastic case circuit breaker with electronic release is more perfect.

    The new generation of plastic case circuit breakers have the functions of grounding fault protection and residual current protection. The new generation of plastic case circuit breaker also has residual current protection function. Twin structure and assembled structure are generally adopted in structure. The twin structure is small in size, convenient in maintenance and replacement, and the assembled structure is flexible in derivation.

    In order to meet the needs of the system, more and more attention has been paid to the development of accessories, providing a wealth of internal and external accessories. The new generation of moulded case circuit breakers have communication functions. They are easily connected with various field bus systems (such as Profibus, Devicenet, Modbus, etc.) through external communication adapters to realize remote monitoring.