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Method for power quality summary and trending

  • US 7,050,916 B2
  • Filed: 11/05/2003
  • Issued: 05/23/2006
  • Est. Priority Date: 11/05/2003
  • Status: Active Grant
First Claim
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1. A system for accumulating and evaluating electromagnetic phenomena of multiple power quality categories of a power distribution system, comprising a circuit monitor coupled to said power distribution system and accumulating data representing said electromagnetic phenomena, said circuit monitor being programmed to determine a power quality index for each of said multiple power quality categories, and a single overall power quality index for all of said power quality categories, said power quality indices for power quality categories involving steady state conditions being based on the percentage of time said conditions exist during an evaluation period and the severity of such conditions, and said power quality indices for power quality categories involving abnormal events being based on the number of such events that occur during an evaluation period and the severity of such events.

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