The HVA30 is not only the most advanced HV test system available, it is also the lightest, most compact instrument of its type on the market. The HVA30 has the highest power to weight ratio of any comparable unit available.

There is no need to carry two pieces of equipment
 around and then interconnect them!
 

• Cables (XLPE, PE, EPR, PILC ETC.)
• Capacitors.
• Switchgear.
• Transformers.
• Rotating Machines (IEEE 433).
• Insulators.
• Bushings.

Find Weak Cables without Making Cables Weak!

Design
The instrument is easily programmable allowing the operator to setup or select test sequences in either automatic or manual mode. Apart from the variable frequency VLF output, the operator can also select dual polarity DC and cable jacket or sheath testing output modes. Also the applied test voltage, current, capacitance, resistance and time are displayed and recorded.

The HVA30 is capable of testing 0.5µF (Approx. 5,000 ft/1500m of cable) at 0.1Hz and 33kV peak. The frequency of the output can also be reduced allowing even larger capacitance loads to be tested. At 0.02Hz, approx. 25,000 ft/7620m of cable can be tested.

To assist the operator, the instrument will automatically calculate the optimum frequency to be selected for larger loads. The load independent, symmetrical output waveform avoids the potentially destructive space charge effects caused by DC polarization that occurs in aged extruded cables such as XLPE/PE/EPR, causing them to fail prematurely when exposed to conventional high voltage DC or to test instruments with large non-symmetrical output waveforms.

Should a breakdown occur during testing, the actual voltage at which it occurred is displayed and recorded. If cable burning (fault conditioning) mode is activated, the fault resistance can be conditioned to allow easier and less stressful fault location techniques to be applied.

Test results are stored in the instrument's onboard memory allowing easy retrieval and download to a PC/Laptop for review and analysis.
 

In addition, DC "proof" or hipot testing has been found to be ineffective in detecting even serious defects in cables. Since this is the main objective of any hipot test, and due to the negative side effects of DC, VLF AC waveform testing is now recommended by almost all cable testing standards/guides such as IEEE, CENELEC, VDE, SABS, etc.

Acceptance or maintenance hipot/proof testing using VLF high voltage sinusoidal AC allows the operator to efficiently detect serious cable insulation defects, before they result in an in-service failure, without affecting those healthy sections of the cable that still have remaining service life.