High Voltage Vlf Hipot Instruments

Hvi has been the world s leading source for vlf test equipment since 1998.

High voltage vlf hipot instruments.

30 kv ac 200 kv ac e series digital. Iii high voltage vlf hipot instrument product brief data of current voltage wave form can be directly sampled at high voltage side so the data is real and accurate. Vlf hipots perform voltage withstand tests and provide the voltage source for diagnostic cable testing. In june 2018 hv hipot engineer was invited to parth electricals for commissioning of gdvlf 80 vlf ac hipot test.

0 1 hz 0 01 hz 0 4 µf 50 µf. Designs and manufactures industry leading high voltage test equipment for proof testing diagnostic testing high voltage breakdown testing and preventative maintenance testing. With the hvi vlf products it can be down with a practical economical and easy to use package. 34 kv ac 65 kv ac output range.

Vlf very low frequency ac technology. Cables should be tested with ac voltage. A long cable may have many microfarads of capacitance. Pft series ac hipots test medium and high voltage electrical apparatus.

Offering the largest selection in the industry including ce marked models voltage ratings range from 30 kv 200 kv with load ratings from 0 4 µf 50 µf. Vacuum bottles hot sticks motors generators rubber gloves iso phase bus switchgear and other loads requiring ac withstand testing hvi s ac hipots are among the smallest lightest and most economical available while delivering higher power ratings and enhanced features. A 100 lb vlf instrument can do the job of a multi ton 60hz ac test set. The pts 75 pts 75f5 and pts 75f6 are combination high voltage dc proof tester and megohmmeter.

Because vlf testing supplies a working frequency of 0 1hz as opposed to the 50 60hz usually required for live transmission the physical size of the vlf test set is massively reduced. On march 2019 engineer from hv hipot goes to india for conmissioning of 4500kva 750kv ac resonant test system which was imported a few years ago. Although the frequency is very low it is an alternating current with polarity reversals every half cycle. The principal use of vlf is testing medium and high voltage shielded power cables.

Hvi provides the largest selection of vlf instruments including ce marked models the most powerful and highest voltage models and. If the output exceeds the set limit of voltage the instrument will shut down to protect itself the actuation time is less than 20ms. Trusted for the most technically advanced portable and user friendly high voltage equipment on the market. Dielectric strength and insulation resistance testing are combined into one instrument saving time money size and weight.

Critically the test object still receives the alternating sinusoidal voltage that would be supplied through everyday use but the size of the test equipment is.