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              來源:http://www.cekidots.com/ 日期:2021-09-02 發布人:tongjid


              What is the difference between miniature circuit breaker and molded case circuit breaker?
              As a kind of short circuit breaker, miniature circuit breaker and molded case circuit breaker have been widely used in life and even industry. What is the difference between them?
              I have a clear understanding of miniature circuit breaker and molded case circuit breaker, which will be introduced in detail below.
              Miniature circuit breaker, also known as miniature circuit breaker, is suitable for overload and short circuit protection of AC 50 / 60Hz, rated voltage 230 / 400V and rated current up to 63A lines, and can also be used for infrequent operation and conversion of lines under normal conditions.
              Miniature circuit breakers are mainly used in various places such as industry, commerce, high-rise and civil residence.
              The molded case circuit breaker can automatically cut off the current when the current exceeds the tripping setting. Plastic shell refers to the use of plastic insulator as the shell of the device, which is used to isolate between conductors and grounded metal parts.
              What is the difference between miniature circuit breaker and molded case circuit breaker:
              1. Dcmil-630 (accessory) alarm sound module of molded case circuit breaker can be connected with thicker wires, such as those with an area of more than 35 square meters. Miniature circuit breakers are only suitable for connecting wires less than 10 square meters.
              2. Molded case circuit breaker the end of molded case circuit breaker is connected with nut, which is easy to compress and has good contact. The miniature circuit breaker adopts a smaller compression terminal dj623-8, which can only be tightened with a screwdriver. The torque is not enough, it is not easy to compress and the contact is not very good.
              3. Molded case circuit breaker adopts two sets of devices to protect overcurrent and short circuit respectively, and the action value of overcurrent protection can be adjusted manually. The miniature circuit breaker shares a set of device for overcurrent and short circuit, and the current is not adjustable.
              4. The molded case circuit breaker has large phase to phase distance and arc extinguishing cover, which has strong arc extinguishing ability, can withstand greater short-circuit current and is not easy to cause phase to phase short circuit. Long life.
              5. The action sensitivity of miniature circuit breaker is higher than that of molded case circuit breaker.

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