Answer / sharafuddeen

AS PER IEEE 400.1 ,THE DC TEST VOLTAGE SHOULD BE 100KV FOR
A 35 KV CABLES.AND THERE IS NO A PARTICULAR FORMULA TO
CALCULATE THE TEST VOLTAGE.IT SHOULD BE AS PER THE
STANDARDS AS PER WHICH THE CABLES MANUFACURED.

Answer / ganesh

AC High voltage Insulation test : 132KV for 5 Minute.
IR test to be conducted before and after the AC high
voltage insulation test - 5KV DC for one Minute

Answer / sumit salunke

we are cheking only lekage current of cable
applicable value of voltage of 33 is should be 27kv dc

Answer / ttrrail

AS HI POT TEST IS CONDUCTED IN DC, 25 KV SHOULD APPLY TO
THE 33 KV CABLE

BECAUSE

33KV X 0.707(RMS VALUE TO AVG VALUE CONVERSION) = 25KV(OPPR)

why one pin of plug pin is longer than other two? In some mobile chargers one pin is made not conducting .Why?

4 Answers  

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