Protection Relays and Controls Arc-Flash Monitoring AF0500 SERIES Arc-Flash Relay Description 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. Sensors, inputs, and connections are health monitored to ensure fail-safe operation. A secondary solid-state trip circuit provides a redundant trip path. A USB port is used for configuration and access to event logs. AF0500 includes an Ethernet interface and supports Modbus® TCP communication. Zone tripping, upstream breaker tripping and tie breaker tripping applications can be easily configured. A number of control inputs allows interconnection of multiple AF0500 units to form a system. Features & Benefits FEATURES BENEFITS Optical Sensors 4 arc sensor inputs Supports both point and fiber sensors Arc-Flash trip time <1ms Limits arc-flash damage and risk of injury 2 IGBT high speed trip outputs Supports applications such as upstream breaker tripping or tie breaker tripping The AF0500 accepts both PGA-LS10 point sensors and PGA-LS20/PGA-LS30 fiber-optical sensors. Thus any combination of fiber or point sensors is supported. Universal Power Supply 100-240 Vac, 24-48 Vdc, or 110-250 Vdc supply Fail-safe system Continuous monitoring of optical sensors and inputs ensures protection LED indication (on unit and each sensor) Trip and sensor status indicated both on relay and sensors Discrete wire networking Multiple AF0500 units can be interconnected to form a system USB interface Data logging and configuration software uses a USB interface with no drivers or software installation Data logging On-board event recorder for system diagnostics (2048 log lines) Ethernet interface Modbus® TCP communication Ordering Information ORDERING NUMBER DESCRIPTION AF0500-00 Arc-Flash Relay AF0500-00-CC Arc-Flash Relay, Conformally Coated ACCESSORIES REQUIREMENT PGA-LS10 Required* PGA-LS20, PGA-LS30 Required* PGA-1100 Optional © 2016 Littelfuse Protection Relays & Controls Littelfuse.com/ArcFlash For fast fault location, front-panel and sensor LEDs indicate sensor health and which sensor detected an arc fault. Sensor Placement The AF0500 Arc-Flash Relay and sensors are easily installed in retrofit projects and new switchgear with little or no re-configuration. Simple applications work straight out of the box with no need of PC configuration. More complex systems with multiple power sources are configured using the relay’s built-in USB interface software. Generally, it is recommended to mount 1 or 2 sensors per cubicle to cover all horizontal and vertical bus bars, breaker compartments, drawers, and anywhere that there is a risk for an arc fault. Threading a fiber-optic sensor through the cabinets and in areas where point-sensor coverage is uncertain results in complete coverage and an added level of redundancy. Even if policy is to only work on de-energized systems, all maintenance areas should be monitored to prevent potential damage and additional cost. Arc Flash Fiber-Optic Sensor Point Sensors Rev: 1-C-050516 Based on Manual 0-D-040816 Protection Relays and Controls Arc-Flash Monitoring AF0500 SERIES Incoming Feeder Sensor Upstream Breaker Tripping In case of failure of the local circuit breaker to open, another trip command is sent after a short delay to an upstream breaker to clear the fault. Sensor Sensor Sensor Sensor Bus Tie Sensor Sensor Sensor Zone 2 Sensor Sensor Zone 1 Incoming Feeder Sensor Zone Tripping AF0500 can trip 2 separate zones. Sensors can be assigned to the zones individually through PC configuration. Tie Breaker Tripping In case of an arc in one section of the switchboard, the AF0500 can trip both the incoming feeder and the tie breaker simultaneously. Thus the affected part of the switchboard is isolated from the non-affected part. Sensor Applications Incoming Feeder Upstream Breaker Local Breaker Accessories PGA-LS10 Point Sensor Line-of-sight light sensor detects an arc as small as 3 kA within a 2-m half-sphere. Includes Sensor health and trip indication. PGA-LS20/PGA-LS30 Fiber-Optic Sensor 360° light sensor to run along bus bars. Sensor health and trip indication. Sensor Sensor Sensor Sensor PGA-1100 Diode Logic Unit This module allows multiple arc-flash relays to trip a common breaker, for example a tie-breaker. Specifications Power Supply Universal Low Voltage Sensor Inputs Trip Outputs UL Rating Supplemental Rating Make/Carry Voltage Rating Current Rating 100 to 240 Vac (+10%, -15%) 50/60 Hz, 20 VA, 110 to 250 Vdc (+10%, -20%) 8 W 24 to 48 Vdc (+10%, -20%), 4 W 4 light sensor inputs for PGA-LS10, PGA-LS20 and PGA-LS30 sensors 2 IGBT switches 120/240 Vac, 1800 VA, 0.75 A maximum continuous, 125/250 Vdc, 138 VA, 0.75 A maximum continuous Communication Dimensions Shipping Weight Operating Temp. Approvals Warranty Mounting Ethernet, 2 ports with internal Ethernet switch, Modbus® TCP H 130 mm (5.1”); W 200 mm (7.9”); D 54 mm (2.1”) 0.9 kg (2 lb) –40°C to +70°C (–40°F to 158°F) UL Listed (UL508), CE, RCM, FCC, CSA 5 years Surface, DIN (with optional D0050 adapter clips) 30 A for 0.2s 24 to 300 Vac, 24 to 300 Vdc 20 A for 2 s, 10 A for 5 s © 2016 Littelfuse Protection Relays & Controls Littelfuse.com/ArcFlash Rev: 1-C-050516 Based on Manual 0-D-040816