AF0500-00

**Protection Relays and Controls** Arc-Flash Monitoring 

## ~~A~~ F0500 ~~S~~ ERIES 

## 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. 

## **Features & Benefits** 

|FEATURES|BENEFITS|
|---|---|
|**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**<br>**Universal Power  Supply**<br>**Fail-safe system**<br>**LED indication**<br>**(on unit and each sensor)**<br>**Discrete wire networking**|Supports applications such as upstream<br>breaker tripping or tie breaker tripping<br>100-240 Vac, 24-48 Vdc, or 110-250<br>Vdc supply<br>Continuous monitoring of optical sensors<br>and inputs ensures protection<br>Trip and sensor status indicated both on<br>relay and sensors<br>Multiple AF0500 units can be<br>interconnected to form a system|
|**USB interface**|Data logging and configuration software<br>uses a USB interface with no drivers or<br>software installation|
|**Data logging**|On-board event recorder for system<br>diagnostics (2048 log lines)|
|**Ethernet interface**|Modbus®TCP communication|



## **Ordering Information** 

A number of control inputs allows interconnection of multiple AF0500 units to form a system. 

## **Optical Sensors** 

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. 

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. 

|ORDERING NUMBER<br>DESCRIPTION<br>AF0500-00<br>Arc-Flash Relay<br>AF0500-00-CC<br>Arc-Flash Relay, Conformally Coated<br>|<br>~~a~~|
|---|



|ACCESSORIES<br>PGA-LS10|REQUIREMENT<br>Required*|
|---|---|
|PGA-LS20, PGA-LS30<br>PGA-1100|Required*<br>Optional|



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Arc Flash<br>Fiber-Optic Sensor<br>Point Sensors<br>**----- End of picture text -----**<br>


Rev: 1-C-050516 Based on Manual 0-D-040816 

© 2016 Littelfuse Protection Relays & Controls Littelfuse.com/ArcFlash 

**Protection Relays and Controls** Arc-Flash Monitoring 

## ~~A~~ F0500 ~~S~~ ERIES 

## **Applications** 

## **Zone Tripping** 

AF0500 can trip 2 separate zones. Sensors can be assigned to the zones individually through PC configuration. 

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Zone 1 11 Zone 2<br>Sensor @'S 8 S/ISSSSSSSH GNSSS|9 SS - SISGos'8 9 9' @ Sensor<br>e 8 .<br>Funaase<br>Sensor Sensor<br>**----- End of picture text -----**<br>


## **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. 

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Incoming<br>Feeder<br>p--------- - Upstream Breaker<br>|<br>|<br>| Local Breaker<br>}! ro o<br>|<br>| |<br>! |<br>SSVSVSss ssssssss'@<br>[SSss|Ssss}_[SS9S|S999) *<br>Sensor Sensor Sensor Sensor<br>**----- End of picture text -----**<br>


## **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. 

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Incoming Incoming<br>Feeder Feeder<br>nas | Bus Tie<br>f<br>| r-—--—---L--~-------,<br>ais<br>Sensor Sensor Sensor Sensor Sensor Sensor Sensor Sensor<br>**----- End of picture text -----**<br>


## **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. ~~a~~ 

**PGA-LS20/PGA-LS30 Fiber-Optic Sensor** 360° light sensor to run along bus bars. Sensor health and trip indication. 

## **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** 

**Universal** 100 to 240 Vac (+10%, -15%) 50/60 Hz, 20 VA, 110 to 250 Vdc (+10%, -20%) 8 W **Low Voltage** 24 to 48 Vdc (+10%, -20%), 4 W **Sensor Inputs** 4 light sensor inputs for PGA-LS10, PGA-LS20 and PGA-LS30 sensors **Trip Outputs** 2 IGBT switches **UL Rating** 120/240 Vac, 1800 VA, 0.75 A maximum continuous, 125/250 Vdc, 138 VA, 0.75 A maximum continuous **Supplemental Rating Make/Carry** 30 A for 0.2s **Voltage Rating** 24 to 300 Vac, 24 to 300 Vdc **Current Rating** 20 A for 2 s, 10 A for 5 s 

**Communication** Ethernet, 2 ports with internal Ethernet switch, Modbus[®] TCP **Dimensions H** 130 mm (5.1”); **W** 200 mm (7.9”); **D** 54 mm (2.1”) **Shipping Weight** 0.9 kg (2 lb) **Operating Temp.** –40°C to +70°C (–40°F to 158°F) **Approvals** UL Listed (UL508), CE, RCM, FCC, CSA **Warranty** 5 years **Mounting** Surface, DIN (with optional D0050 adapter clips) 

Rev: 1-C-050516 Based on Manual 0-D-040816 

© 2016 Littelfuse Protection Relays & Controls Littelfuse.com/ArcFlash