Thursday, 10 March 2016

varistor - MOV Characteristics



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_maxVclamp)Zsource=(4000V1500V)2Ω=1250A

Energy=Vclamp×Isurge×Tpulse=1500V×1250A×20μs=37.5J
Power=Energy×cycle=37.586s=0.625W


enter image description here


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) enter image description here




No comments:

Post a Comment

arduino - Can I use TI's cc2541 BLE as micro controller to perform operations/ processing instead of ATmega328P AU to save cost?

I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...