Arc Protection Device

RDZ-017M High-Speed Arc Protection Device Switchgear 6-10 KV

The RDZ-017MT multi-channel Arc Protection Device(arc protection system) is designed for high-speed shutdown of complete switchgear (KRU) in the event of short circuits (SC) inside the switchgear compartments and accompanied by an open electric arc. The system can be used to protect from 2 to 12 single cells, sections, and groups of cells, i.e. it is able to perform the functions of centralized protection

The principle of operation of the proposed system is based on the control of the luminous flux (illumination) inside the compartments of the switchgear cells. At the same time, photosensors are installed in the switchgear compartments, for example, in the CT compartment and cable cutting, switch, bushing insulators, bus bridge compartment, etc. The RDZ-017M system has a built-in test and functional control that provides verification of the measuring body, connecting wires, and photosensors.

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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

  • Supply voltage – 24 V DC, 1 A;
  • Operating temperature range – from – 35 C to + 65 C;
  • WATER operation threshold – no more than 0.5 mw/cm;
  • Response time – no more than 2 ms;
  • Up to 12 channels for connecting fiber-optic sensors of point or loop type;
  • Up to 8 freely programmable electromechanical output relays for the organization of trip signals and inhibitions of automatic reclosure and automatic reclosure;
  • Connection of up to 100 expansion units to increase the number of sensors and output signals from the OVOD-L arc protection device line via the CAN bus;
  • 4 analog inputs for measuring 3 phase currents (A,B,C) and zero sequence 3Io.
  • Main characteristics of analog inputs:
  • Rated current – 1/5 A;
  • Range of measured effective values of phase currents – 0.5…50

 

 

 

 

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