The difference between contactors and circuit breakers

Update date:2018-05-12 Source:MAXGE

circuit breaker

1, the circuit breaker is mainly used for protection. Its protection is currently more commonly used three-phase protection, both overload protection, short-circuit short-circuit delay, short-circuit long delay. There are some protection functions such as undervoltage and overvoltage. It depends on the brand and model. Its closing and closing can be manual or electric. There are three types of installation methods: fixed type and drawer type. According to the size of the current and the operating voltage level can be divided into low-voltage molded case circuit breakers, low-voltage frame circuit breakers and high-voltage vacuum circuit breakers. According to the different trip curves can be divided into different uses. And the fuse is still very different.


2, the contactor is mainly used for industrial control, the general load is mostly motor, of course there will be some heaters, do dual power switching and other occasions. The on-off of the contactor is achieved by controlling the coil voltage. According to the different structure of arc extinguishing, it can be divided into vacuum contactor and common contactor. According to different control voltages, it can be divided into DC contactor and AC contactor. Its main accessory is the auxiliary contact. Moreover, it does not have short-circuit protection and overload protection capabilities, so it must be used in conjunction with fuses and thermal relays.


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