Method of monitoring the grading margin between time-current characteristics of intelligent electronic devices

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United States of America Patent

PATENT NO 8981951
APP PUB NO 20120212348A1
SERIAL NO

13504482

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Abstract

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A method of monitoring the grading margin between at least two time-current characteristics of Intelligent Electronic Devices (IEDA, IEDB) installed in an electrical power system, each Intelligent Electronic Device comprising a counting means, the grading margin comprising a safety margin set by a user, characterized in that it comprises, when a fault occurs which causes a fault current in the electrical power system, a step of providing a warning to the user when the safety margin is infringed upon.

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Patent Owner(s)

  • ALSTOM TECHNOLOGY LTD;SCHNEIDER ELECTRIC ENERGY UK LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Richards, Simon Abbots Bromley, GB 7 8
Subramanian, Sankara Stafford, GB 5 81
Wixon, Alan Stafford, GB 1 3

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