EMERSON VE4001S2T2B4 Counter module

EMERSON VE4001S2T2B4 Counter module

If LI is requested to include the chopped wave in this case the peak value of the chopped impulse shall be 10 % higher than for the full impulse ( i.e 10 % more ). For transformers with a high-voltage winding having Um > 72,5 kV, lightning impulse tests are routine tests for all windings of the transformer.

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Repeated dielectric tests: 

For transformers which have already been in service and have been refurbished or serviced, dielectric tests shall be repeated at test levels of 80 % of the original values, unless otherwise agreed upon, and provided that the internal insulation has not been modified. Long duration AC induced test ( ACLD ) shall always be repeated at 100 % test level. Repetition of tests required to prove that new transformer, having been factory tested, is always performed at 100% of test level.

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