HVA30-7 - VLF DC Hipot Testing Device

The HVA30-7 Extra Power VLF/DC Hipot model was designed primarily for electrical utilities that have large complex cable networks that demand a very powerful test instrument to overcome the large loads presented by these long cable systems.

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Capable of testing up to 150,000ft / 45km of cable - it does not get much more powerful than this. This instrument, like all other HVA models, provides a very powerful high voltage DC output in addition to the VLF AC output.

The HVA30-7 model can be used for testing many other electrical apparatus like transformers, motors/generators, switchgear, etc. Its single piece design has one of the highest power-to-weight ratios outputs in the industry.

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Like all other instruments in the HVA series, there is no need to connect two heavy pieces of test equipment with interconnecting cables, etc. There is no warm-up period required before use and no insulation oil used in the design that needs to be maintained.

NETA ATS Table 100.2 The column headed â'œDCâ'' is given as a reference only for those using dc tests to verify the integrity of connected cable installations without disconnecting the cables from the switchgear. It represents values believed to be appropriate and approximately equivalent to the corresponding power frequency withstand test values specified for voltage rating of switchgear. The presence of this column in no way implies any requirement for a dc withstand test on ac equipment or that a dc withstand test represents an acceptable alternative to the low-frequency withstand tests specified in these specifications, either for design tests, production tests, conformance tests, or field tests. When making dc tests, the voltage should be raised to the test value in discrete steps and held for a period of one minute.

The column headed â'œDCâ'' is given as a reference only for those using dc tests to verify the integrity of connected cable installations without disconnecting the cables from the switchgear. It represents values believed to be appropriate and approximately equivalent to the corresponding power frequency withstand test values specified for voltage rating of switchgear. The presence of this column in no way implies any requirement for a dc withstand test on ac equipment or that a dc withstand test represents an acceptable alternative to the low-frequency withstand tests specified in these specifications, either for design tests, production tests, conformance tests, or field tests. When making dc tests, the voltage should be raised to the test value in discrete steps and held for a period of one minute.

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