Vlf Cable Tester

This combination of size and power makes very low frequency cable testing perfect for testing longer sections of cable and apparatus.

Vlf cable tester. The design optimized for rapid transportation and quick setup and the continuous duty cycle are two attributes that qualify the system. Because the inherent capacitance of a power cable. Compared to traditional ac dc hipot testing vlf cable testing methods are able to more easily determine the high voltage field of. In the first step a go no go statement is sufficient.

An ac voltage test is the best way to verify the ac integrity of a cable. The device under test must withstand a vlf very low frequency ac voltage for a preset testing time without flashover. Vlf cable testing makes use of ac voltages in a frequency range of 0 01. The vlf sine wave 34 kv is a compact robust and portable vlf sine wave test system for medium voltage cables.

When vlf withstand testing cable the proper test voltage and time duration are critical for the success of the test. Vlf testing uses very low frequencies as part of an ac cable maintenance routine. This combination of size and power makes very low frequency cable testing perfect for testing longer sections of cable and apparatus. To ac high voltage test this cable requires the use of vlf technology.

Vlf cable testing very low frequency is a technique for testing of medium and high voltage mv and hv cables. From the above relationship when comparing vlf 0 1 hz to power frequency 60 hz there is a 600x lower power and current requirement when testing a cable at the same test voltage. If a vlf test is too low in voltage and or too short in duration more harm than good may result. Vlf testers are smaller and more practical than ac testers but output the same amount of power as a 50 hz mains device.

Vlf testing uses very low frequencies as part of an ac cable maintenance routine. Vlf cable testers also known as vlf hipot testers are used to conduct vlf withstand tests. If a cable can t hold 2 3 times normal voltage it is not. Vlf testers are smaller and more practical than ac testers but output the same amount of power as a 50 hz mains device.

A long cable may have many microfarads of capacitance. Vlf cable testing is the cutting edge technology for proof testing of fully operating medium voltage cables and the detection of faulty ones. With monitored withstand test mwt testing and diagnostics in compliance with ieee400. The hva28td vlf high voltage test set is an ultra compact lightweight 0 1 hz vlf cable tester with integrated tan delta diagnostics.

As an ideal tool for routine cable testing. The principal use of vlf is testing medium and high voltage shielded power cables. This has the added benefit that the size of the test instrument can be significantly reduced to allow for a very portable high voltage tester. Once partial discharge is triggered in a defect under the test.

Vlf systems are advantageous in that they can be manufactured to be small and lightweight. Perform the test as instructed to make best use of vlf technology.