The lightning impulse voltage generator under UHV power can help many power workers conduct various power tests more conveniently.

A chopped wave is essentially the standard full wave described above, but with the voltage abruptly and rapidly forced to zero at a certain point on its tail, usually near the peak.

Generation Method:In a laboratory, this is achieved using a chopping gap or a triggered switch. When the impulse voltage generator applies a voltage to the test object, a gap with a breakdown voltage set just below the expected withstand level of the test object is used. When the voltage rises to the gap's breakdown voltage, the gap flashes over, creating a short circuit that "chops" the subsequent part of the voltage wave.

This sudden collapse of voltage creates an extremely high rate of voltage change (dv/dt).

Notation: It is denoted by its time to chop, for example, "1.2/50 ~ 3 μs" describes a 1.2/50μs full wave that was chopped at approximately 3 microseconds.