Littelfuse arc-flash relays provide superior protection against the damaging effects of arc flashes. These market-leading, arc-flash relays deliver reliable, easy-to-install protection with plug-and-play functionality, making them as easy to retrofit into existing switchgear as installing them into new equipment. Arc-flash relays are an integral part of an arc-flash protection system that can minimize damage, and save money, time, and lives. The Littelfuse arc-flash relays improve sustainability and the life of electrical equipment.

 

Model	Image	Description
A0220 Series		The A0220 series is an arc-detection, photo-electric sensor that provides superior arc-flash monitoring. These sensors react to light within a 180° detection zone.
AF0025 Series		The AF0025 series arc-flash relay is a cost-effective and OEM-focused solution that provides innovative arc-flash protection in a compact package. The relay is able to significantly reduce arc-fault damage in ac and dc compartments by detecting the light from an arc flash using one or two optical sensors, and rapidly providing a trip signal.
AF0100 Series		The AF0100 series arc-flash relay is a cost-effective, microprocessor-based protection relay that limits arc-flash damage by using light sensors to rapidly detect an arc and then trip a circuit breaker. Any combination of point and fiber-optic sensors can be connected to the relay to provide maximum protection.
AF0500 Series		The AF0500 is a microprocessor-based arc-flash relay that limits arc-fault damage by detecting the light from an arc flash and rapidly tripping the feeder breaker. The unit is well suited for switchgear, transformer and power converter applications.
D0920 Series		The D0920 series arc-detection unit is a high-speed relay used for electrical power-distribution systems. It provides a simple and cost-effective solution for arc-flash monitoring. This device supports up to two A0220 point sensors mounted in a switchboard and requires a 230 V ac supply.
PGA 1100 Series		The PGA-1100 Diode Logic module is an optional accessory for the Littelfuse Arc Flash Relays. It is used in installations with more than one breaker and more than one Arc Flash Relay. Purpose of the unit is to separate the trip paths, so the breakers can be tripped independently from each other.
PGA-LS10 Series		The PGA-LS10 series arc-detection point sensors are capable of detecting light from every angle in front of them due to the shape of the cylindrical lens on the front of the sensor. These sensors are installed and positioned in switchboards to give them direct line of sight to all powered connections where an arc could develop.
PGA-LS20 Series		The PGA-LS20 series is an arc-detection, fiber-optic sensor that is designed to detect arcs along its entire length. This sensor is meant to be installed with the fiber along the back wall of switchboards to form the detection range across all compartments with just one sensor.
PGA-LS30 Series		The PGA-LS30 series Fiber-Optic Sensor is an arc-detection sensor that uses fiber to detect arcs anywhere along its length. This sensor is meant to be installed with the fiber along the back wall of switchboards to form the detection range across many compartments with just one sensor.
PGR 8800 Series		The PGR-8800 series arc-flash relay is a microprocessor-based protection relay that limits arc-flash damage by using light sensors to rapidly detect an arc and then trip a circuit breaker. Phase-current-transformer inputs are provided for current-constrained, arc-flash protection and, when so equipped, a programmable definite-time overcurrent function can be enabled.