BQT6904400-01

Power Frequency Dielectric Test (Optional)

Follow the below steps for power frequency dielectric test.

  1. Rack-in and close all the VCB with functional unit doors open.

  2. Disconnect all the VTs and surge arresters during the test.

  3. Open lower cubicle of one functional unit feeder to connect the test cable.

  4. The test voltage shall be 80% of the rated short-duration power-frequency withstand voltage of the switchgear as specified in clause 7.105 of

    IEC 62271-200.

NOTE:
  • The power frequency dielectric test can be carried out in one single operation.

  • The insulation level of the switchgear can be tested on site.

  • This procedure requires to defeat the interlocks.

  • It is essential to follow the power frequency test sequences.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

Was this helpful?