Method and apparatus for remote testing of coordination of...

G - Physics – 01 – R

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G01R 31/327 (2006.01) H02H 3/04 (2006.01) H02H 7/30 (2006.01)

Patent

CA 2193317

Coordination of the overcurrent/time trip characteristics of a hierarchy of overcurrent protection devices is accomplished through a central tester whichestablishes a pattern of test currents for the individual overcurrent protection devices which simulates a fault at a specified location in the power system. The individual assigned test currents are transmitted over a communications link to the separate overcurrent protection devices where they are stored in memory. The central tester then broadcasts a test signal which simultaneously initiates testing of all of the overcurrent protection devices using the assigned test currents stored in memory. The trip times are recorded and reported back to the central tester for analysis.

a coordination des caractéristiques de surintensité/délai de déclenchement d'une hiérarchie de dispositifs de protection de surintensité est réalisée par un testeur central. Ce dernier détermine un modèle de courant d'essai, qui simule une défaillance à un endroit particulier du réseau électrique, pour chacun des dispositifs de protection de surintensité. Les courants d'essai spécifiques sont transmis par le biais d'une ligne de communication à chacun des dispositifs de protection de surintensité où ils sont mis en mémoire. Le testeur central envoie ensuite un signal d'essai, qui indique simultanément à tous les dispositifs de protection de surintensité de procéder à un test à l'aide des courants d'essai en mémoire. Les délais de déclenchement sont enregistrés et transmis au testeur central pour analyse.

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