differential relay

differential relay

[‚dif·ə′ren·chəl ′rē‚lā]
(electricity)
A two-winding relay that operates when the difference between the currents in the two windings reaches a predetermined value.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
To cushion the country from outages in the Suswa-Nairobi North-Dandora 220KV substation, Kenya Power has already replaced circuit breaker 105 at Naivasha 132/33KV substation and a differential relay at Dandora 220KV, the CS said.for
It can be noticed in the figures that false trippings of a conventional differential relay are possible in the cases of magnetization inrush accompanied by CT saturation.
Of course, a differential relay is needed to handle many low-level signals that also are differential.
In addition, these sessions will also be highlighted by the specific discussion of topics like “Congestion Management for Urban EV Charging Systems,” “Formal Models for Verifying Stealthy Attacks on State Estimation in Power Grids,” “A Control Loop Approach for Integrating The Future Decentralized Power Markets & Grids,” “The Development of a Smart Grid Co-Stimulation Platform & Case Studies on Vehicle-to-Grid Voltage Support Applications,” “Wireless Communication-aided Differential Relay Protection in Smart Grids,” and “Smart Metering Speed Dating, Short-Term Relationships for Improved Privacy.”
Vibrations from a drill they were using "tripped a sensitive differential relay, which caused an unplanned and unannounced 15-minute loss of electrical power, it alleges.
'A three-phase differential relay for transformer protection', IEEE Trans.
Chapters cover generator normal operations, generator short circuit calculations, generator differential relay, backup fault protection, generator ground fault protection, unbalanced current protection, motoring protection, field winding protection, overexcitation, abnormal frequency protection, minimum excitation limiter, loss of synchronism, loss of field protection, synchronization protection, accidental energization protection, and motor protection.

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