Controlling Lightning Induced Outages on …

Controlling Lightning Induced Outages on overhead LinesByKevin Mara, Protection Overview Why do we need Lightning protection? 20% of all distribution Outages are caused by Lightning . Reliability Cost What is Lightning ? How to establish good Lightning protection of Lightning Wave Shape Follows Ohms law V = I x R Strike has current flowing and path has impedance Voltage is caused by current flowDefinition of Lightning Wave Shape Standard Direct Lightning Strike Current Wave 8/20 s 8 microseconds rise time to 90% peak 20 microseconds to half of peak value Standard Direct Lightning Strike Voltage Wave s microseconds rise time to 90% peak 100 microseconds to half of peak value Standards used in surge testing and ratings of equipmentTypical Wave Shape used to Define Lightning for Laboratory TestsPeak Current AmplitudeMedianlo g10I33834 C urrent Am plitudeNum ber o f ValuesData MedianP ro b a b ility o f Exceeding

Controlling Lightning Induced Outages on Overhead Lines By Kevin Mara, P.E. 770-425-8100

Loading..

Tags:

  Induced, Lightning, Controlling, Outages, Overhead, Controlling lightning induced outages on, Controlling lightning induced outages on overhead

Information

Related search queries