Maximum Switching Surge Factor Calculation
Maximum Switching Surge Factor Calculation
(OP)
I'm trying to find the calculation for determining the Maximum Switching Surge Factor for a 230kV Transmission Line.
This term is defined in the National Electric Safety Code as a switching-surge level for circuit breakers corresponding to 98% probability that the maximum switching surge generated per breaker operation does not exceed this surge level, or the maximum anticipated switching-surge level generated by other means, whichever is greater.
Anyone familiar with a methodology or calculation for coming up with this value??
Thanks
This term is defined in the National Electric Safety Code as a switching-surge level for circuit breakers corresponding to 98% probability that the maximum switching surge generated per breaker operation does not exceed this surge level, or the maximum anticipated switching-surge level generated by other means, whichever is greater.
Anyone familiar with a methodology or calculation for coming up with this value??
Thanks






RE: Maximum Switching Surge Factor Calculation
RE: Maximum Switching Surge Factor Calculation
(In the 2011 edition of NESC it is on page 93 about 2/3 of the way down the page.)
RE: Maximum Switching Surge Factor Calculation
thread238-297714: Determine Switching Surge Levels for High Voltage System
and here the cuky2000 answer.