I need to select MOV for my application. Vin max=520Vrms Surge Voltage= 4000KV as per IEC61000-4-5, 8x20us waveforms.
So my calculation is Surge Current=(Vtransient_max−Vclamp)Zsource=(4000V−1500V)2Ω=1250A
Energy=Vclamp×Isurge×Tpulse=1500V×1250A×20μs=37.5J
Power=Energy×cycle=37.586s=0.625W
So I Selected the above Part No. And I hope this will work, but in datasheet two more graph are there , dont know how to use those two graph , if they are impacting me to select the MOV. (image attached)
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