Views: 4 Author: Site Editor Publish Time: 2022-12-06 Origin: Site
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The exact name of the miniature circuit breaker is MCB, which is a kind of circuit breaker.
For common low-voltage circuit breakers, there are frame circuit breakers ACB and molded case circuit breakers MCCB, where the rated current of ACB is from 630A to 6300A, the rated current of MCCB is from 10A to 1600A, and the rated current of MCB is from 3A to 63A.
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Circuit breakers belong to low-voltage switching appliances, referred to as low-voltage appliances. The function of the circuit breaker in the line is to perform line protection, here there are overload protection and short circuit protection.
Any low-voltage electrical appliance has mechanical life and electrical life. The so-called mechanical life refers to the number of closing and opening of low-voltage electrical appliances under uncharged conditions, and the electrical life refers to the number of closing and opening of low-voltage electrical appliances under electrified conditions. The mechanical life assessment is the mechanical structure of the switching device, while the electrical life assessment is the ability of the contacts to break the arc and resist arc ablation. Generally, the electrical life of switching appliances (including high-voltage and low-voltage appliances) is much lower than the mechanical life.
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Since the task of the circuit breaker is to perform line protection, its electrical life is much lower than that of some low-voltage electrical appliances specially used for breaking lines, such as AC contactors.
It is inappropriate to use micro-break (short for miniature circuit breaker) MCB to open and close the circuit, which is equivalent to reducing the mechanical and electrical life of the micro-break, and the gain outweighs the gain.
If you must install a switch to control the socket, it is recommended to change the lead socket to a socket with a switch. The socket with a switch can control both external lines, such as lighting, and internal sockets. We only need to slightly modify the wiring at the rear of the socket with a switch to realize the on-off control of the upper two-wire socket or the lower three-wire socket.
