New Combination Model VT-33 VLF .1Hz. AC Hipot, Cable Fault Locator and Burner Receives Positive Industry Welcome

High Voltage’s new VT- 33 offers complete cable care for underground shielded power cables up to the 25 kV class. It is the industry’s first VLF AC cable testing and fault finding/burner
instrument in one self contained package.

The VT-33 provides a 0 to 33kV peak AC.1Hz Very Low Frequency (VLF) AC hipot mode, meeting the newly adopted IEEE 400.2 standard for testing shielded power cables utilizing VLF to hipot/proof test cables in lieu of the damaging effects of past DC hipot testing on service-aged cables.

It also contains a variable 0 to 13 kV at 760 joules capacitor discharge output for locating faults, and a VLF burner to quickly reduce arc over voltages and fault impedances. A VLF Burner is much quicker compared to conventional DC burners. This is because of its use of alternating positive and negative polarities combined with the cables stored energy discharged into the fault every half cycle, rapidly reducing the fault’s arc over voltage to a lower level.

The VT-33 is also TDR and Radar Ready with a built in Arc Reflection Filter. The VT-33 has all the tools needed in one box and is ideal for the many power cable maintenance applications of utilities, municipals, HV contractors, industrials and large education or military campuses.

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