A VLF unit is an AC hipot with a 0.1 Hz or lower output frequency, used for AC testing high capacitance loads. At 0.1 Hz, it requires 600 times less power to test a cable, generator, etc., than at 60 ...

The VLF-34E from High Voltage Inc. is a new VLF AC hipot that uses a solid state design with microprocessor controls. It meets the requirements of world standards regarding cable testing up to 25kV ...