SPD has two waveforms, 10/350μs and 8/20μs. What do they mean? Let’s find out. According to IEC standard, Class I SPD test adopts Class I waveform, and its impulse current characteristic parameters are lightning discharge current Iimp, specific energy W/R and energy Q, and its waveform is 10/350μs; The 2-level SPD test uses a type […]