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.

The design optimized for rapid transportation and quick setup and the continuous duty cycle are two attributes that qualify the system. As an ideal tool for routine cable testing. Making them useful especially for field testing where transport and space can be issues. 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 cable testing makes use of ac voltages in a frequency range of 0 01. 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. A long cable may have many microfarads of capacitance.

Vlf cable testers also known as vlf hipot testers are used to conduct vlf withstand tests. This combination of size and power makes very low frequency cable testing perfect for testing longer sections of cable and apparatus. Vlf cable testing is the cutting edge technology for proof testing of fully operating medium voltage cables and the detection of faulty ones. This combination of size and power makes very low frequency cable testing perfect for testing longer sections of cable and apparatus.

Vlf testing uses very low frequencies as part of an ac cable maintenance routine. When vlf withstand testing cable the proper test voltage and time duration are critical for the success of the test. With monitored withstand test mwt testing and diagnostics in compliance with ieee400. Vlf testers are smaller and more practical than ac testers but output the same amount of power as a 50 hz mains device.

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. Vlf testing uses very low frequencies as part of an ac cable maintenance routine. Because the inherent capacitance of a power cable.

The vlf sine wave 34 kv is a compact robust and portable vlf sine wave test system for medium voltage cables. Hva28 td vlf test set at a glance. If a vlf test is too low in voltage and or too short in duration more harm than good may result. The device under test must withstand a vlf very low frequency ac voltage for a preset testing time without flashover.

The hva28td vlf high voltage test set is an ultra compact lightweight 0 1 hz vlf cable tester with integrated tan delta diagnostics. 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. Vlf testers are smaller and more practical than ac testers but output the same amount of power as a 50 hz mains device. The principal use of vlf is testing medium and high voltage shielded power cables.

If a cable can t hold 2 3 times normal voltage it is not. Compared to traditional ac dc hipot testing vlf cable testing methods are able to more easily determine the high voltage field of.