VLF, like power frequency is still AC and the output waveform is also a sinewave, although there are some cheaper, less sophisticated VLF units on the market that have a quasi-sinewave or square wave output.
The practical benefits of VLF over power frequency for high voltage testing is the significantly reduced size, weight and cost of the test instruments, particularly when testing high capacitive loads like shielded power cables, large generators/motors etc.
If your question is not addressed here or you need a more complete answer, please contact us here or call us at +1 (678) 445-2555 and we will be happy to assist you.
