Transformer protective relay

Details Transformer protective relay Transformer protective relay

H - Electricity

02

H

348/24, 317/7

H02H 7/045 (2006.01) H02H 3/38 (2006.01)

Patent

CA 1256486

- 1 - Abstract: A protective relay for a transformer issues a relay tripping command when the differential current that is the difference between currents in the primary and secondary windings of the transformer has a magnitude larger than the specified value and, at the same time, when the differential current includes the fifth harmonic component less than the specified value. Another cause of tripping signal generation is the differential current value processed to have a certain timer characteristics.

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