AFR-3S Arc Flash Relay with 3 Channels

Features

Arc Flash Detection
The AFR-3S is our new advanced arc flash relay, which adopts a dual criterion (current and arc sensing) for arc flash detection. Only the arc flash happens and the current overload the presetting values, it will alarm for arc flash. It offers not only arc flash protection, but also circuit breaker failure protection.

Multi-channel Input and Output Options
The AFR-3S supports up to 6 binary inputs for Circuit breaker, Device maintenance, optional smoke sensor, Reserved function, and Common terminal. Moreover, there are 3 arc sensor inputs so it can collect 3 channels of arc light signals simultaneously. other optional sensor inputs include temperature sensor inputs and partial discharge sensor inputs. As for AFR-3S arc flash relay output, it has 4 or 6 relay outputs for arc action, alarm, circuit breaker trip, etc.

Data Logging for Arc Flash Diagnostics
It can complete exception records, event records, and operation records to help you find the arc flash location quickly and diagnostic your system comprehensively.

arc flash data logging with arc flash relay

Compact Size & Quick Arc-Flash Trip Time
The AFR-3S arc flash relay is small, exquisite and structural reasonable so it is suitable for a broad range of arc-flash applications, especially small space electrical cabinets. With high-grade, high-quality components, as for arc flash-trip time, it can do arc trip within 10ms while the arc fault happens.

In addition, the AFR-3S arc flash relay is equipped with RS485 communication interface and integrated MODBUS standard communication protocol. By using high-grade and high-quality components, and multi-layer board technology and SMT process, it has high electrical performance and support ST visible light and ST ultraviolet sensor access.

Specification

Working power supply
Power supply	AC/DC 85~265V, DC24/48V customized
Power consumption	Normal operation ≤8W; device action ≤10W
Current
Rated current input	5A, Frequency: 50HZ/60HZ; Accuracy: 0.5
Rated current output	2.5mA, CT ratio:2000:1
Measuring range	Protection current: 0.06I_n -6I_n
Linear range	0~40A (Impedance: 20Ω)
Power consumption	≤0.5VA
Electrical parameter error
Protection current accuracy	≤±4%
Zero sequence current accuracy	≤±4%
Arc signal input
Number of channels	1-3 channels
Sensor type	ST optical fiber type
Detection light type	Visible light/ UV light optional
Optical fiber length	5m/10m/15m
Temperature measurement signal input (optional)
Number of channels	3-12 Channels
Sensor type	Passive/Active/Micro
Signal acquisition type	433M
Partial discharge signal input (optional)
Channels number	1 channel
Sensor type	Wire transmission
Detection light type	Geoelectric wave/Ultrasonic wave/Noise/UHF (optional)
Smoke sensor input (optional)
Channels number	1 way
Sensor type	External wired smoke sensor
Fire extinguishing sensor (optional)
Injection time	≤12S
Start mode	Electric start & thermal start
Protect space	≤3m³
Component type	Aerosol fire extinguishing unit
Action time
Pure arc trip	≤10ms
Current+arc trip	≤20ms
Alarm action time	≤40ms
Relay input
Quantity	5DI, NO; Dry contact
Max. switching voltage	35V
Max. switching current	50mA
Action time	Max. 18μs
Relay output
Channels number	4 Channels (optional 6 channels)
Load capacity	Load capacity: 10A@250Vac/ 12A@24Vdc. Max. switching current: 10 A (ac)/ 12A(dc). Max. switching voltage: 277Vac/ 300Vdc
Max. switching current
Max. switching voltage
Communication Interface
Communication Interface	1 Channel RS485, photoelectric isolation, with lightning protection
Baud rate	4800, 9600bps (default 9600)
Communication protocol	Modbus RTU
Ethernet communication
Communication Interface	1 Channel
Network parameters	10M/100M adaptive
Communication protocol	IEC60870-5-103 (NZ103)
Environment
Working temperature	-10 ~ +55°C
Storage temperature	-25 ~ +70°C
Humidity	5~95%RH
Atmospheric pressure	60kPa~106kPa
Electromagnetic compatibility
Electrostatic discharge test	GB/T 14598.14-2010 ,level-4
Fast transient dry resistance test	GB/T 14598.10-2007, level-A
1mhz burst interference test	GB/T 14598.13-2008, level-3
Electrical disturbance test	GB/T 14598.9-2010, level-3
Surge immunity test	GB/T 14598.18-2007
Conducted disturbance test	GB/T 14598.17-2005 ,22-6

Arc sensor specification:

Sensor type	Visible light sensor	UV light sensor
Sensitivity type	Full spectrum	UV spectrum
Spectral response bandwidth	280nm ~ 550nm	280nm ~ 400nm
Optical threshold	5-20klux (error: < ±20%)	1-10mw/cm² (error: < ±20%)
Monitoring angle	-120°~ 120°	-120°~ 120°
Angle decay rate	≤20%	≤10%
Operating temperature	-30~70°C	-40~85°C
Interface type	ST fiber optic/screw fixing	ST fiber optic/screw fixing
Optical fiber length	5/10/15 meters	5/10/15 meters