Arc flash detection system, apparatus and method

摘要

An arc flash system (34) for a circuit breaker (30) and a method of operation is provided. The arc flash system (34) includes a first sensor (48) such as a photo-detector and a second sensor (50) that detects a circuit breaker parameter. The arc flash system (34) is responsive to signals from the first sensor and second sensor to determine if an arc flash event is occurring to avoid nuisance tripping of the circuit breaker.