Afr-4 Electric Arc Flash Protection Relay

• Customization: Available
• Theory: Electromagnetic Relay
• Usage: Protection Relay
• Model NO.: AFR4
• Phase: 3
• Electricity Type: Ac
• Number of Pole: 2
• Load: Medium Power Relay
• Protective Characteristics: Enclosed Relay
• Action Principle: Electromagnetic Type
• Size: Miniature
• Type: Electric Parameter Relay
• Power Supply: 85~265VAC/DC, Optional 48VDC
• Consumption: Monitoring Stanby <5W Do Trig <10W
• Do Relay Channels: 6
• Trip Coil Contact: AC250V/8A Fast Relay, The Passive Node
• Trip Operation Time: <20ms @ Overcurrent + Arc Protection
• Comm Port: RS485 Modbus-RTU
• Transport Package: Express Box
• Specification: 10*10cm
• Trademark: Blue Jay
• Origin: Chongqing, China
• Production Capacity: 1000 Piece/Pieces Per Day
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 0.650kg

Product Description

 

Product Description

The AFR-4 is a versatile, standalone bay-mounted protection device designed for arc fault protection applications. It supports 4-channel arc signal detection and offers configurable arc tripping modes, ensuring precise, rapid fault isolation when arc faults occur.
 

Boasting a fast relay output speed of up to 5ms, the AFR-4 minimizes or eliminates arc flash damage entirely, enhancing overall system safety and reliability. It is suitable for a wide range of arc protection applications in low- and medium-voltage power distribution systems across various industrial and commercial settings.
 

In addition to core protection capabilities, the AFR-4 features arc flash warning functionality and a dual-criteria tripping mechanism (arc detection + current sensing), delivering a comprehensive arc flash protection solution. Integrated RS485/Modbus communication enables seamless remote monitoring and control-making it an ideal choice for modern power system architectures.

Feature

1. Relay tripping speed ≤5 ms
2. Zoned arc light detection
3. Multiple combined tripping schemes
4. Circuit breaker failure protection
5. 4-channel arc light signal detection

6. Dual detection criteria: arc light + overcurrent

7. Built-in RS485 / Modbus communication protocol
8. Supports both ST visible light and ST UV sensor inputs

Specification

Working power supply
Power supply	AC/DC 85~265V
Power consumption	≤8W
Current input
Rated current value	5A/1A
Measuring range	Protection current: 0.6~6In
Error	≤4%
Arc signal input
Number of channels	4 channels
Sensor type	ST optical fiber type
Detection light type	Visible/ UV optional
Spectrum	280-550nm
Optical threshold	8000 lux (±20%)
Optical fiber	5m/10m/15m
Action time
Fast relay output	≤5ms
Pure arc trip	≤8ms
Current+ arc trip	≤15ms
Relay output
Quantity	6 trip output
Operating Voltage	5A@250V
Input	Passive contact, photoelectric isolation, isolation voltage 2500V
Mechanical life	≥10000 times
Communication Interface
Communication Interface	1 Channel, photoelectric isolation, with lightning protection
Baud rate	4800, 9600bps (default 9600),19200
Communication protocol	Modbus RTU
Environment
Working temperature	-10 ~ +55°C
Storage temperature	-25 ~ +70°C
Humidity	5~95%RH
Atmospheric pressure	60kPa~106kPa

 

Dimension