This paper discusses the issue on shunt capacitor’s type test or the endurance test should be repeated or not

in case of some design parameters changed.The common idea is that the test must be repeated

but it is not absolute.Taking the change of 2 film product into 3 film product as an example and verifying from the standard specification and analysis of test result

it is concluded that in case the film layer is changed only from 2 to 3 but total film thickness remains unchanged

namely

in case of slight change of certain ratings

it is not needed to perform type test or endurance test any longer.