Distribution line reclosers, unlike circuit breakers located in substations, cannot rely on an auxiliary “station power” energy source for opening and closing its line-interrupting contacts. Therefore these small units utilize AC line voltage as the actuating power for the contacts. Low- voltage “trip” and “close” circuits still exist for control purposes, but the actual energy source for rapid tripping/reclosing cycles comes from the AC line itself.
Recloser is a special type of medium-voltage circuit breaker used to quickly interrupt and re-establish power in distribution lines is called a recloser. Read more about complete working of reclosers here or download PDF article here
