Solar Arc Flash Detection

Littelfuse understands the challenges facing the solar market, they have over 25 million devices installed in photovoltaic power systems to protect equipment subjected to harsh environments, including solar rated fuses, relays, TVS diodes, varistors, power distribution blocks and surge protection devices.

AF0100

The AF0100 series offers a cost effective solution that reduces arc-fault damage by detecting the light from an arc flash and rapidly tripping. Two remote light sensors can be connected to one relay and multiple AF0100 and/or AF0500 relays can be connected to monitor additional sensors, providing complete coverage for a wide range of applications. The compact, DIN-rail or surface mountable body makes this device an ideal solution for equipment manufacturers.

Supply Voltage (VAC): 100-240

Supply voltage (VDC): 24-48, 24-48 100-240

Relay Contacts: 2 6-A Form C (N.O./N.C.) Trip; 1 6-A Form C Health

AF0500

The AF0500 is a microprocessor based arc-flash protection relay that limits arc-fault damage by detecting the light form an arc flash and rapidly tripping the feeder breaker. The unit is designed for switchgear, transformer, motor controls centre and power converter applications. The sensors, inputs and connections are health monitored to ensure fail-safe operation. A redundant trip path is provided by a secondary solid-state trip circuit. A USB port is used for configuration and access to event logs and includes Ethernet interface and supports Modbus TCP communication. Zone tripping, upstream breaker tripping and tie breaker tripping applications can be easily configured with the AF0500 series.

Supply Voltage (VAC): 120/240

Supply Voltage (VDC): 12-48/120/240

Relay Contacts: Three Form C (N.O./N.C.); One Form A (N.O.).

PGR-8800

The PGR-8800 is a UL and cUL listed arc-flash relay that reliably detects developing arc-flash incidents without nuisance tripping by looking for a combination of excess light and current. Phase-current transformer inputs are provided for current-constrained arc-flash protection and, when equipped, a programmable definite-time overcurrent function can be enabled. Chances of the PGR-8800 nuisance tripping by setting a threshold ambient light are reduced because of an optical sensor on the device. Sensors, inputs and connections are monitored to ensure fail-safe operation. A secondary solid-state trip circuit provides a redundant trip path and a USB port is used for configuration and access event logs and graphs. This device is also used as part of an energy-reducing active arc-flash mitigation system to meet NEC 240.87 (B) (4).

Supply Voltage (VAC): 120/240

Supply Voltage (VDC): 12-48/120/240

Relay Contacts: Three Form c (N.O./N.C.); One Form a (N.O.)

For further information on Littelfuse’s arch flash detection devices please call us on: 01444 243 452 or email: [email protected].