Structure and principle of miniature circuit breaker

[] the structure and principle of miniature circuit breaker: circuit breakers for overcurrent protection device, can be used to switch indoor wiring with current control switch, can effectively protect the important components of the electrical, mainly used for short circuit protection and prevent serious overloading, motor load protection on industrial machines will specify the use of circuit breaker is one of the protective device. ...

Circuit breakers for overcurrent protection device, can be used to switch indoor wiring with current control switch, can effectively protect the important components of the electrical, mainly used for short circuit protection and prevent serious overloading, motor industrial machines load protection will to use the circuit breakers for protection device.

When using the hand to pull up the handle, will perform the starting current, when the circuit overload or short circuit that automatically jump off, the cause of the accident was ruled out, the next pull to pull up again, otherwise unable to reach once again closed circuit action.

Different points for the addition of springs and arc extinguishing devices are different from ordinary power switches. In the spring break or closed in the process of operation, pre storage spring force to the critical point, the moment bounce off and fast on or off contact, so the operation speed is not affected by the speed of operation of the hand. Arc suppression device to eliminate the operation of the internal contacts generated by the spark arc chamber, any contact to open the load current will generate arc (that is, spark). Because the arc is conductive air column free into the extremely high temperature, it is by ampere right-hand rule, form a strong magnetic field in an arc chamber between the Fleming's right hand rule, the air conductor fast and elongated arc bending arc, the spark extinguished more quickly.

If the load is an electric motor, the normal start can be raised high current, so it should be used 1.5 times ~2 times the rated current of the circuit breaker.