AFR-3S Arc flash relays are mainly used to detect arc faults in electrical systems and protect equipment and personnel in electrical systems from arc faults. The arc flash protection relay can detect arcs by monitoring parameters such as current, voltage, and electric power, and quickly disconnect the power supply before an electrical fire occurs, thereby reducing the risk of fire.

AFR-3S Arc flash relay is usually used in medium and high-voltage power distribution systems, control cabinets, transformers, generators, motors, and other electrical equipment. They adopt the dual-criteria principle of arc light detection and overcurrent detection and have the characteristics of fast protection action and high reliability.

Specification

 

Working power supply
Power supply AC/DC 85~265V
DC24/48V customized
Power consumption Normal operation ≤8W; device action ≤10W
Current input
Rated current value 5A/1A
Measuring range Protection current: 0.06~10In
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/UV optional
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 error
Pure arc trip ≤10ms
Current+arc trip ≤20ms
Alarm action time ≤40ms
Fire extinguishing spray lag time ≤3s
Relay output
Channels number 4 channels (optional 6 channels)
Operating Voltage AC250V/8A
Input Passive contact, photoelectric isolation, isolation voltage 2500V
Communication Interface
Communication Interface 1 channel, 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 -25 ~ 70°C
Storage temperature -40 ~ +85°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