BS 7803:1995 Guide to insulators of ceramic material or glass for overhead-lines with a nominal voltage greater then 1000 V, puncture testing
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This technical report deals with puncture testing of
ceramic and glass insulator units of class B only.
Although there is little or no experience of testing
class B long-rod and line-post insulators, the
experience already gained with cap and pin, and pin
insulators, permits their mounting arrangements
and test procedures to be specified for use in future
tests to gain experience.
This report may be applied also in tests on
insulators of other materials (e.g. polymers and
composites). However, it may be useful to consider
the possible need to adjust the test procedure
accordingly.
An impulse voltage puncture test on insulators in
air is required and applied in more and more
countries, and by a growing number of users. The
applied test procedures differ from each other
considerably. This report is published with the
object of specifying a standard procedure for
impulse voltage puncture test on insulators in air,
so that experience with this test may be obtained on
a common basis
It is recommended that wider manufacturer and
user experience with the impulse test be obtained in
order to establish the practicability of including it in
a future standard.
