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Fundamental basis for d.c.-supplyless distance relays with ferrite cores for transmission line protection

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1 Author(s)
Anil Kumar, N.M. ; Technical University Braunschweig, Institute for Electrical Drives & Control Techniques, Braunschweig, West Germany

A mathematical basis is established for realising various distance-relay characteristics for transmission-line protection. Phase sequences of a set of three voltage signals provide the criteria for relay operation. A ferrite-core version, modelled as a phase-sequence indicator, is manipulated to realise the conventional as well as unusual operating characteristics. Such versions have been designed and constructed without the requirements of a d.c. supply ¿a decided advantage over semiconductor units.

Published in:

India, IEE-IERE Proceedings -  (Volume:12 ,  Issue: 1 )

Date of Publication:

January-February 1974

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