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  TESTING INSTRUMENT FOR POWER CABLE TESTING :                                                                               BACK


 
 1.0   HV / MV Power Cables testing by : Very Low Frequency (VLF) test method

           1.1   The new test method for testing cables by AC sinusoidal waveform.
                   
           1.2   Achieved by reducing test frequency to 0.2 Hz.

           1.3   The VLF test set detects ageing of the cable insulation, defects in insulation, by
                    measuring the dielectric loss of the insulation.

           1.4   The test set can carry out following tests :

  •   Insulation Resistance measurement.

  •   Polarization Index measurement.

  •   Leakage current measurement.

  •   Capacitance value measurement. Tan delta value measurement.

  •   DC (+ and - Polarity) HV testing.         

     1.5
       This test is used ;

  •   To check the cable insulation during manufacturing stage.

  •   As a routine maintenance test to check the insulation health.

  •   To check the condition of joints.

           1.6   The detailed description of this test can be viewed at ;
                     www.powerlinker.org/htm/VLF.htm


                                                                                                                                                                     

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                                                                                                                                           Update : 20.01.10