The circuit breaker is protective, can extinguish the arc, and has the ability to segment. The contractor uses the coil to control the on-off of the circuit. After the contactor is energized, the normally open is closed, and the long-closed is opened, so as to control.

1. The circuit breaker is mainly used for protection, but it is not broken when overheated. Its protection is currently more commonly used with three-stage protection, including overload protection, short-circuit short-time delay, and short-circuit long-time delay. There are also some Undervoltage and overvoltage. It depends on the brand and model. Its opening and closing can be manual or electric. There are three installation methods: fixed type and drawer type. According to the size of the current and the level of the working voltage, it can be divided into low-voltage plastic Shell circuit breakers, low-voltage frame circuit breakers, and high-voltage vacuum circuit breakers. The different tripping curves, they can be divided into different use cases. They are still very different from fuses.

2. The contactor is mainly used for industrial control, and the general load is mostly motor. Of course, there will be some heaters, dual power switching, and other occasions. The on-off of the contactor is achieved by controlling the coil voltage. According to the different structures of arc extinguishing, it can be divided into vacuum contactors and ordinary contactors. According to different control voltages, it can be divided into DC contactors and AC contactors, and its main accessories are auxiliary contacts.

ZXEV045-100A Epoxy encapsulation 12V Medium Pressure DC Contactor