Electrical protective device
OwnerMatthew S. Mashikianinventor
Life of this patent
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Abstract
An electric protective device for protecting a cable, its termination or other apparatus from the effect of lightning strikes on an overhead line to which the apparatus is connected comprises a tubular insulator combined with a surge arrester and integrated by common terminals at the ground and high voltage ends. The insulator and the surge arrester are concentrically disposed about the conductor in a common insulated structure to eliminate connecting leads therebetween and the voltage drop which occurs across such leads during a rapid rise in current. The surge arrester may contribute all or part of the electrical stress grading required in the termination.
Claims11
An electric protective device for a high voltage cable termination from an overhead transmission line comprising:
- (a) a tubular insulator through the center of which a voltage carrying conductor passes and which, when in service, will be exposed to the voltage of the conductor at one of its ends and to a ground voltage at its other end;
- and
- (b) a surge arrester concentrically disposed about said tubular insulator, said insulator and surge arrester having common terminals at their ground and high voltage ends.
An electric protective device for a high voltage cable termination from an overhead transmission line comprising:
- (a) a tubular insulator through the center of which a voltage carrying conductor passes and which, when in service, will be exposed to the voltage of the conductor at one of its ends and to a ground voltage at its other end;
- (b) a surge arrester of tubular configuration disposed concentrically about said tubular insulator electrically connected in parallel with said tubular insulator;
- (c) conductive elements extending across the ends of said insulator and surge arrester providing common terminals therefor;
- and
- (d) an outer insulator about said surge arrester.
Dependencies are inferred from the claim text.