Jan-7th-2009
Oil Insulation
Oil insulation has received several applications in electrical work. It
has been proposed for use in underground conduits. These it was proposed
to fill with oil after the insertion of the conductors, the latter
properly wrapped with cotton or other covering. For induction coils it
has been very successfully used. Its principal utility depends on the
fact that it is liquid, so that if pierced by a spark it at once closes
again. A solid insulator if pierced is permanently injured. It is also
used in telegraph insulators (see Insulator, Liquid) to prevent surface
leakage.
