Working mode of low voltage moulded case circuit breaker
The manufacturer of molded case circuit breaker will show you the working mode of low-voltage molded case circuit breaker:
Most of the components of MCCB manufactured by most MCCB manufacturers are composed of contact module, arc extinguishing module, control module, release and MCCB shell. When the low-voltage molded case circuit breaker is short circuited, the current magnetic field generated by the part of the wire circuit connected with the molded case circuit breaker through the current more than ten times than usual will restrain the spring, causing the release to drive the control mechanism to have effect, and the gate of the molded case circuit breaker will jump out in a very short time. When the main circuit of the molded case circuit breaker is overloaded, the amount of current flowing through the circuit increases in a moment and emits a great deal of heat. At this time, the bimetallic sheet will deform. When the bimetallic sheet of the molded case circuit breaker deforms to a certain shape, it will drive the control mechanism. We can also know that the greater the amount of current in the circuit, then The less time an action takes.
At present, the electronic molded case circuit breakers produced by the manufacturers of molded case circuit breakers adopt the mutual inductor to collect and record the current of each phase, and then compare with the parameters set for the realization. At this time, when there is an abnormal current fault, it will be processed, so that the electronic release of molded case circuit breaker can drive the operation mechanism. Molded case circuit breaker is used to cut and connect the load electric circuit, which can cut the problem circuit in a short time, avoid the further spread of circuit fault, and the electrical equipment associated with the molded case circuit breaker can operate safely and stably under the protection of molded case circuit breaker. At the same time, it should be noted that when we need to use high-voltage molded case circuit breaker, we must solve the problem of arc extinguishing module, otherwise it will bring great danger.
The low-voltage molded case circuit breaker produced by the manufacturer of molded case circuit breaker has a lot of protection functions, such as providing protection for electrical equipment when the circuit is overloaded, short circuited and over-voltage. Secondly, because the breaking speed of the low-voltage molded case circuit breaker is fast enough, the operation is convenient and simple, there is no danger in operation and many other advantages. Therefore, molded case circuit breakers are widely used in the market. The main contact point of low-voltage molded case circuit breaker is controlled manually or closed automatically. When the main contact point of the MCCB is closed, the free release will fasten the main contact point at the closed position of the MCCB gate. The coil on the over-current release on the molded case circuit breaker and the heat sensitive components of the air will cause the bimetallic sheet to be deformed by the heat, so as to drive the free release to have an effect.
The low-voltage molded case circuit breaker manufactured by the manufacturer of molded case circuit breaker also has other names, which are called automatic air switch. It can be used to connect or cut off the load current circuit, and can be used to control the motor when the starting times are not very frequent. At this time, the function of molded case circuit breaker is equivalent to knife switch, over-voltage relay, thermal relay and leakage protector. The low-voltage molded case circuit breaker is an indispensable protection equipment in the low-voltage distribution network system.
