Abstract:
Petroleum has long been used as insulating oils
serving the purpose of insulating and cooling media for
high-tension electric equipment. In particular, as the
insulating oil was produced by using wax-free crude oil
in early days of this century, it was possible to produce
a product easily used in cold winter.
Depending upon uses, insulating oils are divided
into various kinds, including the insulating oil for
circuit breakers and transformers, condenser oil for
high-tension condensers and oil-filled cables and cable
oil for insulating the core wire of impregnated power
transmission cables. The technology introduced here
is related to the insulating oil for circuit breakers and
transformers.