Vlf Cable Testing

Perform the test as instructed to make best use of vlf technology.

Vlf cable testing.

Making them useful especially for field testing where transport and space can be issues. If a vlf test is too low in voltage and or too short in duration more harm than good may result. Vlf cable testing very low frequency is a technique for testing of medium and high voltage mv and hv cables. Hv test lead ground cable figure 4.

Because the inherent capacitance of a power cable. A very low frequency vlf withstand test is an ac withstand test usually carried out at a frequency between 0 1 hz and 0 01 hz. This kind of test is suited for testing high capacitance loads such. Vlf systems are advantageous in that they can be manufactured to be small and lightweight.

Connection setup for a vlf cable connecting a vlf test instrument to a cable refer to ieee 400 2 for safety guidelines. Vlf testing is not only used for testing solid dielectric cable any application requiring ac testing of high capacitance loads can be tested using very low frequency. When vlf withstand testing cable the proper test voltage and time duration are critical for the success of the test. 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. Vlf cable testing is the cutting edge technology for proof testing of fully operating medium voltage cables and the detection of faulty ones. The device under test must withstand a vlf very low frequency ac voltage for a preset testing time without flashover. Very low frequency vlf withstand testing is the application of an ac sinusoidal waveform generally at 0 01 0 1 hz to assess the quality of electrical insulation in high capacitive loads such as cables.