AFR3-02 – Arc Flash Protection Relay

The AFR3-02 series Arc Flash Protection Relay is designed to protect switchgear cabinets of power stations and substations 0.4 … 35 kV in the event of short circuits in them, accompanied by an open electric arc, and issue a control signal in the automation circuit and relay protection.

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Features

 

  • Adjustment of sensitivity of all arc sensors
  • Internal self-diagnosis of the integrity of the arc sensors and microcircuits
  • Setting up and reading data from the device via the USB port, including in the absence of operational power
  • Implementation of current and voltage control
  • Breaker function
  • Special mode “Test”
  • Event log entry
  • Oscillography (Recording of oscillograms of illumination of each sensor)
  • 2 types of device operation logic
  • Protection against false positives

 

Applications

  • Reduce the harm of arc light to human body;
  • Reduce damage to equipment caused by arc short-circuit faults;
  • Avoid transformer damage caused by bus failure;
  • Protect the dc system in the station;
  • Ensure the stable operation of power substations;
  • Thermal power plant electrical section switchgear;
  • Wind farm and photovoltaic station switchgear;
  • Large municipal engineering project;

 

Specification

  • Wide temperature range: – 40°С…+55°С
  • MTBF: 320,000 hours
  • Response time:  < 1ms
  • Output relays: 6 pcs
  • The angular size of arc control sector: 360 degrees
  • Number of arc sensors: 4 pcs
  • Maximum sensor length: up to 25 m
  • Minimum fixed arc current: 200 A
  • Nominal threshold illumination of operation: up to 5,000 Lx
  • Warranty: 7 years. Extended warranty option up to 15 years
  • Full readiness time when power is turned on: no more than 0.2 s
  • Sustained power interruptions: 1 s