Power electronic capacitor is usually used in the non-power frequency occasions and its peak withstand current Ipeakand impulse withstand current I赞sare the key technical parameters. Since the current withstand ability is the weakest point of the metalized film capacitor

therefore the capacitor with such parameters must be subject to current withstand ability test. The charge and discharge circuit of the capacitor is composed of high power electronic switch

the discharge current

current decay cycle and variation rate of current and voltage are controlled quantitatively by way of adjusting the charging voltage or the discharge circuit parameters. This test method is fast

simple

practical and is effective measures for the design verification and quality control of the metalized capacitor.