How to obtain waveform data for 1.2/50 us lightning pulse simulation?

[hanakp]

Hi all, I'm working on a measurement system that needs to survive standard 1.2/50 us lightning pulse with 9600 V peak voltage. It has somewhat complicated RC network at the input and I want to simulate peak voltages on all components in PSpice. But the problem is obtaining waveform data (time vs. voltage table) of the pulse. Its images are all over the Internet, but not the data. Is it in the EN 61010-1 standard somewhere (I don't have a copy)? Or do I really need to painstakingly recreate the data from the graph? Thanks.

[MitjaN]

If you're left recreating data from image, this might help you: https://automeris.io/WebPlotDigitizer/

[T3sl4co1l]

Approximately this: https://www.seventransistorlabs.com/Images/8-20_Surge_Network.png
(Closer to IEC 61000-4-5, don't know if 61010 uses the same or not.)

Set initial conditions, don't even need a PWL source or whatever.

Note that it's the same network for 8/20 and 1.5/50, just depends on open/short condition.  It'll tend to be 1.5/50 for common mode with high resistance, and 8/20 when terminated or shunted by MOVs say.  It's shown with a shorted load.

Tim

[hanakp]

Thanks T3sl4co1l, your circuit simulates it pretty well. I removed the RL resistor because the inputs on "my" system have high impedance (megaohms). I also tried a simpler 1.2/50 circuit from Addendum to Recommendation ITU-T K.44, but its edge time is about 20% shorter than the idealized waveform:

https://pes-spdc.org/content/new-waveshape-definitions-1250-820-and-10700?page=1

Well, the standards allow for +-30% time tolerances anyway, so it doesn't matter much in practice.