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Numerical distance pr

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Numerical distance pr

  1. 1. By:Mr. Mohan SawarkarMrs. Mohini Sawarkar
  2. 2. The basic principle of distance protection involves the division of the voltage at the relaying point by the measured current.If the measured impedance is less than the reach point impedance it is assumed that the fault exists on the line between the relay and the reach point.
  3. 3. SIPROTECH 7SA522
  4. 4. ABB MAKE REL670& 650
  5. 5. AREVA MAKE MICOM P441, P442
  6. 6. NUMERICAL DISTANCE RELAY FUNCTIONAL OVERVIEW
  7. 7. The numerical distance relays provide combination of reliability, selectivity, suitability, sensiti vity, speed and compatibility with IEC61850 .So ,we must retrofit old distance protection with numerical distance protection.

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