The High Voltage VLF-6022CM has a 62 kV AC peak output suitable for testing cables rated up to 35 kV

Its high load capacity can test up to over 10 miles (16 km) of cable, depending on type. This model includes: a charging current and load capacitance meter, test timer, and polarity indicating lights. The two-piece construction facilitates easy transport and storage.

Model VLF 6022CM is a continuously adjustable 0-60 kilovolt AC hipot with a 0.1/0.05/0.02 Hz sinusoidal output. The waveshape is independent of capacitive loading and can test cables up to 50,000 feet in length. The units are portable and operate from a conventional 120 or 230 volt electrical service.

Controls are elementary: Power ON switch, HV ON and OFF buttons, overload breaker, output voltage knob and a single range 40 kV/60 kV peak kilovoltmeter. For waveform viewing, a BNC output jack for oscilloscope connection is included. The unit is rated for continuous duty operation.

A VLF test can detect cable defects at a much lower voltage than a DC Hipot/Proof test. Also, voltage transients are much smaller with a VLF AC Hipot test during cable failure or flashover than with a DC Hipot/Proof test. No travelling waves are generated with VLF during testing.

The VLF AC Hipot also burns, breaks-down and conditions a cable fault much quicker than conventional DC burners. Therefore, fault locating time is reduced with existing thumper/radar devices.