Molded case circuit breakers are also known as device-type circuit breakers. All parts are sealed in plastic housings. Auxiliary contacts, undervoltage release and shunt release are modular. Due to the very compact structure, the molded case circuit breaker is basically inaccessible. It is mostly manual, and the large capacity can be selected for electric splitting. Due to the application of electronic overcurrent release, molded case circuit breakers can also be divided into Class A and Class B. Class B has good three-stage protection characteristics, but due to price factors, thermal magnetic trip units are used. Class A products have a higher market share. The molded case circuit breaker is equipped with a contact, an arc extinguishing chamber, a trip unit and an operating mechanism in a plastic case, generally not considering maintenance, and is suitable for a protection switch for a branch circuit, and the overcurrent release device has a thermal magnetic field. Both the type and the electronic type, the general thermomagnetic molded case circuit breaker is a non-selective circuit breaker, only the overload long delay and short circuit instantaneous protection. The electronic molded case circuit breaker has overload long delay and short circuit. Four protection functions: delay, short-circuit transient and ground fault. Some of the new electronic molded case circuit breakers also feature a regioselective chain function. Most molded case circuit breakers are operated manually and some have motor operating mechanisms.
Zhejiang ETEK Electric Technology Co., Ltd. was established in January 2011. It is a manufacturing company specializing in R&D, production and sales of high and low voltage electrical products, such as terminal distributors, industrial distributors, industrial control appliances, DC system distributors, etc. 3 homes. The main manufacturing department and an import and export trading company. The three manufacturing sectors are the terminal distributor manufacturing division, the industrial distributor manufacturing division and the industrial control appliance manufacturing division.
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