Application of transformer ground differential protection relays

Application of transformer ground differential protection relays

Transformer ground differential protection relays (device 87G) have been used to protect the windings of resistance-grounded transformers. A number of strategies have been utilized with electromechanical relays in the past. With the advent of the multifunction digital protective relay, these strateg...

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Veröffentlicht in:IEEE transactions on industry applications 2000-01, Vol.36 (1), p.16-21
1. Verfasser: Sutherland, P.E.
Format: Artikel
Sprache:eng
Schlagworte:
Circuit faults
Coils (windings)
Devices
Digital
Digital relays
Electric relays
Fault currents
Grounds
Power distribution
Power system protection
Power system relaying
Protective
Protective relaying
Resistors
Strategy
Substation protection
Transformers
Voltage
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Beschreibung
Zusammenfassung:Transformer ground differential protection relays (device 87G) have been used to protect the windings of resistance-grounded transformers. A number of strategies have been utilized with electromechanical relays in the past. With the advent of the multifunction digital protective relay, these strategies can be adapted to continue this form of protection.
ISSN:0093-9994
1939-9367
DOI:10.1109/28.821790