Cut Sheet

Protection Relays and Controls
Rev: 1-B-012517
Based on Manual Rev 0
Arc-Flash Monitoring
©2017 Littelfuse Protection Relays & Controls
www.littelfuse.com/af0100
AF0100 SERIES
Description
The AF0100 Series arc-flash relay is 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 an ideal solution for
equipment manufacturers.
Two isolated Form-C contacts are provided for applications with
multiple devices that must be tripped. This is especially useful
for generator applications where the generator and breaker need
to be tripped in case of an arc flash.
The AF0100 accepts PGA-LS10 point sensors and PGA-LS20/
PGA-LS30 fiber-optic sensors in any combination. Sensor
health is continuously monitored to ensure fail-safe operation.
A solid-state redundant trip circuit provides an internal fail-safe
mechanism and fast arc-flash response during power up.
Front-panel and sensor LEDs indicate sensor health and
fault location.
Features & Benefits
FEATURES BENEFITS
Compact Fits into a wide range of arc-flash applications
Two optical
sensor types
Point sensors or fiber-optic sensors can be used in
any combination for coverage flexibility
Dual sensor inputs One relay can monitor two arc-flash sensors
Adjustable light
sensitivity
Allows for operation in bright environments and
maximum sensitivity in dark environments
Discrete wire
networking
Multiple AF0100 or AF0500 units can be
interconnected to form a system
Fail-safe system
Continuous monitoring of optical sensors and
inputs ensures protection
USB interface
Configuration software is easy to use with no
drivers or software installation
Unit health
Ensures continuous protection with self diagnostic
and remote unit-healthy indication
LED Indication
Trip and sensor status indication both on relay
and sensors
Arc-Flash Relay
Simplified Circuit Diagram
PGA-LS10
(Point Sensor)
PGA-LS20/
PGA-LS30
(Fiber-Optic Sensor)
24-48 Vdc
Supply
or
100-240 Vac/Vdc
Supply
Digital I/O Connection to other AF0100 or AF0500
(Arc-Flash Protection Relay)
AF0100
Trip 1 Trip 2
Unit
Healthy
L2
L1
–
+
Ordering Information
ORDERING NUMBER DESCRIPTION
AF0100-00 Arc-Flash Relay, Universal Supply
AF0100-10 Arc-Flash Relay, 24-48 VDC
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. Includes
sensor health and trip indication.
Accessories
Specifications
Input Voltage
AF0100-00 100-240 VAC/VDC, 24-48 VDC
AF0100-10 24-48 VDC
Dimensions H 90 mm (3.5”); W 128 mm (5.0”);
D 60 mm (2.4”)
Trip, Error Relays Form C, 250 VAC/30 VDC, 6 A resistive
Trip Time 5 ms (typical)
Sensitivity 10-25 klux programmable
Mounting Surface, DIN rail
Operating Temperature -40°C to +70°C (-40°F to 158°F)
Shipping Weight 1.0 kg (2.2 lb)
Certifications UL Listed (UL 508), CE, RCM, FCC
Warranty 2 years
A
B
A
B