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IEC and IEEE 10/350 and 8/20 us Waveforms

IEC and IEEE 10/350 and 8/20 us Waveforms

IEC and IEEE 10/350 and 8/20 us Waveforms

(OP)
Is my interpretation of the IEC/IEEE 10/350 us and 8/20 us waveforms, as listed below, correct?  If not, please set me straight!

"The IEC/IEEE 10/350 us (microsecond) waveform is an approximation of the surge current waveform experienced for a primary lightning strike.  The IEC/IEEE 8/20 us waveform is an approximation of the surge current waveform experienced for induced lightning effects.

In each case, the first number refers to the amount of time it takes for the surge current to reach its peak, and the second number refers to the amount of time it takes for the surge current to drop to half (50%) of its peak value."

I just read Richard Chadwick's article in the 10/02 issue of "Power Quality" magazine, and want to make sure I'm interpreting the graphs correctly.

Thanks!

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