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Arc Flash Relay

Arc-flash events are dangerous and potentially fatal to personnel. Arcing and arc-flashes occur when electricity flows across what is normally an insulating medium, producing intense, luminous discharges of electrical energy. Arc-flash detection technology allows circuit-protection devices to operate rapidly to reduce the energy of an arc flash, where most current-detection devices would respond slowly or potentially not at all.

Arc Flash Relay (AFR) provides unmatched switchgear protection. This relay reduces arc flash energy by quickly clearing the current feeding the arc. The sensitive light inputs with current permissive detection identify low power phase to ground arc faults. The AFR works to prevent faults in medium and low voltage switchgear, and the factory-installed Arc Flash Relay modules and sensors allow for simple integration into electrical assemblies.

Arc flash mishaps are highly probable in electrical switchboards especially since they may be caused by rodents or falling tools. An arc flash causes huge damage to the switchboard as well as injury to the operating personnel in a very short time of about 150 milliseconds. This damage can be minimised if the system is tripped within 100 milliseconds of the occurrence of arc before significant energy is developed. Hence an arc flash protection system is a necessity in every electrical switchboard, to ensure operator safety and to minimize the damages associated with an arc flash event

Core features

  • An innovative module system allows for simple integration into electrical assemblies.
  • Sensitive light inputs with current permissive detects low power phase to ground arc faults.
  • The relay‚Äôs configurable setup provides optional system selectivity, opening the circuit breaker closest to the arc flash.
  • Flexible module options allow installers to choose between fiber optic loop cable or wired point sensors.
  • If the point sensor option is selected, the relay can be factory wired and tested, reducing time and labor costs.