The surge current generators PG 10-4000 generate impulse currents with wave form 10/50 μs - 10/1000 μs acc. to IEC, VDE etc.. Pulse current output amplitude is controlled by preset charging voltage and can be adjusted up to the maximum value of the special type of generator. The generator is designed for testing electrical components, over-voltage protectors and electronic circuits. It possesses an electronically regulated high-voltage power supply, which allows an excellent reproducibility of the pulse output amplitude.