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Power Supply Devices and Systems of Relay Protection
book

Power Supply Devices and Systems of Relay Protection

by Vladimir Gurevich
December 2017
Intermediate to advanced content levelIntermediate to advanced
260 pages
7h 13m
English
CRC Press
Content preview from Power Supply Devices and Systems of Relay Protection

9

Voltage Disturbances inAuxiliary Power Supply

9.1 Electromagnetic Disturbances in the Power Network

Many cases of malfunctioning of and even damages to microprocessors are caused as a result of the impact of electromagnetic disturbances (blackouts, noise, sags, spikes, surges) from the power supply network on operation of the digital protective relays (DPRs).

9.1.1 Blackout

A blackout results in a total loss of utility power:

  • Cause: Blackouts are caused by excessive demand on the power network, lightning storms, ice on power lines, car accidents, construction equipment, earthquakes, and other catastrophes.

  • Effect: Current work in RAM or cache is lost and there is total loss of data stored on ROM.

9.1.2 Noise

More technically referred ...

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Publisher Resources

ISBN: 9781466583801