New Relay from SEL

The SEL-751A Feeder Protection Relay from Schweitzer Engineering Laboratories is now available with arc-flash detection (AFD) capability, providing automatic protection against dangerous arc-flash events in metal-clad switchgear. AFD interrupts power to the arc flash before it can cause significant damage or personal injury. Fiber-optic light sensors in the SEL-751A detect the light produced by an arc flash. To prevent false tripping, the SEL-751A looks for an overcurrent that coincides with the light flash and sends a trip signal to the circuit breaker in as fast as 2 ms.

More information at SEL's web site.