SEL arc flash detection technology significantly decreases the time it takes a relay to trip in response to an arc fault, which reduces hazardous arc flash incident energySEL and SEL Feeder Protection Relays and SEL Motor Management Relays combine light sensing technology with fast overcurrent protection to provide high speed arc flash detectionCombining these technologies

Arc protectionArc fault protection is a technique employed for the fast clearance of arcing faults on busbars and within metal clad switchgear and associated cable boxesThe arc is detected using an optical sensor the signal input to a protection device which also monitors the load current on the system.

Safety is paramount on every project and tragic incidents can be avoided with careful planning, review, and proper protectionThis is particularly important with electrical systemsBowman helps our clients mitigate risk and avoid unnecessary injuries by offering arc flash study services on new and existing electrical distribution systems to determine the severity of arc []

Arc Flash ProtectionThe intense energy and very short duration of an electric arc flash represents a very unique exposure one that requires flame resistant garments durable enough to withstand temperatures that approach , °FOnce ignited, regular cotton or poly cotton work clothes can continue burning even after the source of the

The arc flash boundary is calculated to calories cm of incident energyThats the distance where a worker without appropriate PPE would receive second degree burnsSometimes this boundary is the furthest one from the exposed equipment, other times the limited approach boundary is the furthest outWhen the arc flash boundary is the

SEL combines light sensing technology with fast overcurrent protection to provide high speed arc flash detection (AFD)Combining these technologies allows high speed tripping during arc flash events without overtripping for external faults.

FunctionsThe XG RA is an optical sensor that responds to the flash of light emitted during the incidence of an arcing faultOnset of the light flash detection by the RA occurs in a few milli secondsWhen an arc is detected, the resistance presented by the RA drops to a level where the current flow increases to approximately mA.

Flash Protection Boundary (outer boundary) The flash boundary is the farthest established boundary from the energy sourceIf an arc flash occurred, this boundary is where an employee would be exposed to a curable second degree burn ( calories cm

Arc Flash protection including clothing, shields, hood, balaclava, insulated tools, gloves mats to ensure the greatest protection for electrical updated their cover photo.