PERE Measures to protect power semiconductor devices from overvoltage RvRC3则A RCD D 中 Lightening arrestor 4 RC or rCd snubbers(will be discussed later) 4 Zener diode, Metal Oxide Varistor(MOv, Break Over Diode BOD)Power Electron cs i 11 Measures to protect power semiconductor Measures to protect power semiconductor devices from devices from overvoltage overvoltage S F RV RCD T D C U M RC1 RC 2 RC3 RC 4 L B SDC Lightening arrestor Lightening arrestor RC or RCD RC or RCD snubbers snubbers (will be (will be discussed later discussed later ) Zener diode, Metal Oxide diode, Metal Oxide Varistor Varistor (MOV), Break Over Diode (BOD) (MOV), Break Over Diode (BOD)