AFR-4 arc flash detection relay is a versatile and independently operating device for bay based protection. It supports 4-channels arc signal detection and can configuration multiple arc tripping modes, ensuring accurate and fast fault isolation. With a fast relay output speed up to 5ms, AFR-4 can minimize or completely eliminate arc flash damage, improving system safety and reliability. It can be used in various arc protection applications in low or medium voltage power distribution system.
AFR-4 also provides flash warning and dual criteria tripping mechanism (arc detection + current), providing a comprehensive solution for arc flash protection. Integrated RS485/Modbus communication enables seamless remote monitoring and control, which is ideal for modern power systems.
AFR-4 arc flash detection relay is a versatile and independently operating device for bay based protection. It supports 4-channels arc signal detection and can configuration multiple arc tripping modes, ensuring accurate and fast fault isolation. With a fast relay output speed up to 5ms, AFR-4 can minimize or completely eliminate arc flash damage, improving system safety and reliability. It can be used in various arc protection applications in low or medium voltage power distribution system.
AFR-4 also provides flash warning and dual criteria tripping mechanism (arc detection + current), providing a comprehensive solution for arc flash protection. Integrated RS485/Modbus communication enables seamless remote monitoring and control, which is ideal for modern power systems.
| 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 | AC250V/5A |
| 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 |
Arc sensor parameter:
| Sensor type | Visible light sensor | UV light sensor |
| Sensitivity type | Full spectrum | UV spectrum |
| Spectral response bandwidth | 250nm ~ 550nm | 280nm ~ 400nm |
| 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 optical fiber |
| Optical fiber length | 5/10/15 meters | 5/10/15 meters |
Front view
Side view
