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Description / Abstract:
This report deals with dielectric tests on completed apparatus.
Tests on materials and on components during the course of
fabrication usually are left to the discretion of the manufacturer
and are not a subject for standardization except as to method and
technique. Impulse test values where specified in standards are
based on the Basic Impulse Levels and thus are consistent for
different equipment. Impulse test conditions and technique are
outside the scope. Hence, this report deals mostly with conditions
and test values associated with low frequency dielectric tests.
Purpose-A statement of the purpose of this
report follows from this review of the general problem. It is:
(1) to present a survey of the overvoltages encountered in
service.
(2) to review existing test values and practices in present
standards
(3) to' propose guiding principles for the selection of
dielectric test values
(4) to investigate other types of testing to determine their
latent usefulness and the desirability of standardization.