circuit recloser, reclosure

A somewhat more complex form of circuit breaker which protects electrical transmission systems from temporary voltage surges and other unfavorable conditions. In addition to preventing electrical overloads from passing through a circuit, reclosures can automatically "reclose" the circuit and restore normal power transmission once the problem is cleared.

Reclosures are usually designed with failsafe mechanisms that prevent them from reclosing if the same fault occurs seveal times in succession over a short period. This insures that repetitive line faults don't cause power to switch on and off repeatedly, since this could cause damage or accelerated wear to electrical equipment. It also insures that temporary faults such as lightning strikes or transmission switching don't cause lengthy interruptions in service.

See also:

fuse, circuit breaker, line surge, surge arrester, sectionalizer, transmission