VLF stands for Very Low Frequency. VLF is generally considered to be 0.1 Hz and lower. Many people assign too much mystery to VLF testing. A...

Very Low Frequency (VLF) communications transmitters use digital signals to communicate with submerged submarines on at frequencies of 3-30 ...

In fact, the ultra-low frequency insulation withstand voltage test is an alternative to the power frequency withstand voltage test. In the p...

1. Fully discharge the tested object with discharge rod before starting up, (the discharge rod using method is: first discharge with the cur...

Power System Many high-current electrical equipment requires accurate measurement of the resistance of the circuit during preventive testing...