Electric transmission line ground fault prevention methods using dual, high sensitivity monitoring

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United States of America Patent

PATENT NO 11831147
APP PUB NO 20230261461A1
SERIAL NO

17672422

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Importance

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Abstract

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A method for preventing ground fault in a three-phase electric transmission line system caused by a line break, includes: providing a programmable relay protection system, including a plurality of relay devices on each line, programmed to include: preset parameter ranges of at least two electric operating conditions, at least one high sensitivity instantaneous undercurrent and at least one high sensitivity condition selected from line differential overcurrent and negative sequence overcurrent (and combinations thereof), the preset ranges being acceptable operating parameter ranges; monitoring; permitting closed circuit operation when all of the lines show that the two operating conditions are within the preset acceptable operating parameter ranges; tripping a circuit breaker on a broken line when that line shows that the two operating conditions are outside the preset parameter ranges; and shutting down power to the broken line before it otherwise causes a ground fault or other short circuit.

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Patent Owner(s)

Patent OwnerAddress
VIKING PROTECTION SYSTEMS LLC15915 KATY FREEWAY STE 450 HOUSTON TX 77094

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Smith, Ronald E Antioch, US 39 622
Stuart, Robert B San Tan Valley, US 10 43

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