AFR3-04 – Arc Flash Detection Relay

AFR3-04 Arc Flash Detection Relay with a fiber-optic sensor AFR3-04 is designed to detect the moment of occurrence of an arc in the cabinets of complete switchgears 6-35 kV and issue a control signal in the circuit of automation and relay protection.

Arc protection AFR3-04 is made in the form of a block (having output relays for connection to executive bodies) installed in the relay compartment of the cell, and three arc sensors placed in controlled compartments.

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Features

 

  • The device has three arc sensors – according to the number of possible closed volumes of the KRU, KRUN or KSO cell.
  • The optical system of the device allows you to fix the moment of occurrence of an electric arc and is practically insensitive to other light sources (flashlight, incandescent, fluorescent, direct sunlight, etc.).
  • The device provides protection against false alarms, for example, in the event of high-power impulse electromagnetic interference.
  • The device provides maximum speed from the moment the arc occurs to the operation of the output relays – no more than 10 ms.
  • The device uses the “Failure” output signaling, implemented on a relay with normally closed contacts and relay operation in the presence of an operating voltage (power supply), as well as in the normal operation (integrity) of the arc sensors. In case of violation of the integrity of the arc sensor, a “FAIL” signal is issued. The performance of the device channels is not violated.
  • The device can be used with three, two and one arc sensors without violating the logic of operation. It is also possible to install two or three arc sensors in one compartment for greater reliability.
  • The device has LEDs to indicate both normal operation and the fact of operation (blinker LEDs) of each of the device channels, with memory until reset. The Reset button is provided on the front panel of the device to reset the Operate output relay and blinker LEDs.

 

 

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

  • Device response time: no more than 10ms
  • Number of arc sensors from: 1 to 3
  • number of output relays (groups of contacts): 6 (12)
  • Overall dimensions (HxWxD): 200x155x70
  • Weight: no more than 3KG
  • Universal supply voltage: 110V/220V DC and AC

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