Vlf Cable Tester

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.

Vlf cable tester.

This combination of size and power makes very low frequency cable testing perfect for testing longer sections of cable and apparatus. The design optimized for rapid transportation and quick setup and the continuous duty cycle are two attributes that qualify the system. When vlf withstand testing cable the proper test voltage and time duration are critical for the success of the test. To ac high voltage test this cable requires the use of vlf technology.

Vlf testing uses very low frequencies as part of an ac cable maintenance routine. Because the inherent capacitance of a power cable. This combination of size and power makes very low frequency cable testing perfect for testing longer sections of cable and apparatus. In the first step a go no go statement is sufficient.

The vlf sine wave 34 kv is a compact robust and portable vlf sine wave test system for medium voltage cables. Vlf cable testing is the cutting edge technology for proof testing of fully operating medium voltage cables and the detection of faulty ones. 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. Vlf systems are advantageous in that they can be manufactured to be small and lightweight.

Hva28 td vlf test set at a glance. Vlf cable testers also known as vlf hipot testers are used to conduct vlf withstand tests. A long cable may have many microfarads of capacitance. An ac voltage test is the best way to verify the ac integrity of a cable.

Vlf testers are smaller and more practical than ac testers but output the same amount of power as a 50 hz mains device. The device under test must withstand a vlf very low frequency ac voltage for a preset testing time without flashover. These tests are typically carried out on a frequency between 0 1 hz and 0 01 hz and operate off of a pass fail model. Once partial discharge is triggered in a defect under the test.

If a vlf test is too low in voltage and or too short in duration more harm than good may result. Compared to traditional ac dc hipot testing vlf cable testing methods are able to more easily determine the high voltage field of. The hva28td vlf high voltage test set is an ultra compact lightweight 0 1 hz vlf cable tester with integrated tan delta diagnostics. Vlf cable testing very low frequency is a technique for testing of medium and high voltage mv and hv cables.

Vlf cable testing makes use of ac voltages in a frequency range of 0 01. Vlf testing uses very low frequencies as part of an ac cable maintenance routine. As an ideal tool for routine cable testing. The principal use of vlf is testing medium and high voltage shielded power cables.

Perform the test as instructed to make best use of vlf technology. Vlf testers are smaller and more practical than ac testers but output the same amount of power as a 50 hz mains device.