Difference between Contactor and Circuit Breaker

Contactor coil control circuit off, the contactor is energized, normally open relay closed, normally closed to open, to control.

1. Circuit breaker protection is the main job right. Its protection is more commonly used three paragraphs protection, both overload protection, short-circuit short delay, short time-lapse. Some undervoltage, overvoltage protection. Depending on brand, model It can open and close manually or electric. Installation fixed drawer three ways. According to the size of the current and the voltage level can be divided into low-voltage molded case circuit breakers, low-voltage frame circuit breakers and high-voltage vacuum circuit breaker. Depending on the tripping curves can be divided into different occasions. And the fuse is still a big difference.

2. Contactor the main job of the industrial control generally the majority of the load to the motor, of course, there will be some heaters do dual power supply switching and other occasions. Off of the contactor is achieved by controlling the coil voltage. Can be divided according to the different structure of the interrupter vacuum contactors and contactor. Depending on the control voltage can be divided into the DC contactor AC contactor. Its main accessories for auxiliary contacts. Itself does not have a short-circuit and overload protection capacity and must therefore be used in conjunction with the fuse, thermal relays.