Grading means for high voltage metal enclosed gas insulated surg

Details Grading means for high voltage metal enclosed gas insulated surg Grading means for high voltage metal enclosed gas insulated surg

1980-10-27

1982-07-20

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361117, 31323111, 315 36, H02H 904

Patent

active

043409245

ABSTRACT:
Capacitance grading is provided within gas insulated lightning arresters containing stacked zinc oxide varistors by means of a grading ring electrically connected to the line terminal or, for arresters of the higher voltage ratings, by means of a plurality of telescoping external electrostatic shields. The shields are arranged so that the degree of overlap between sequential shields decreases from the line end to the ground end of the varistor stacks. The capacitance grading is provided by the degree of overlap between the sequential shields and the ratio of the radii of the overlapping shields.

REFERENCES:
patent: 3649875 (1972-03-01), Nagai et al.
patent: 3753045 (1973-08-01), Osmundsen et al.
patent: 3767973 (1973-10-01), Osmundsen et al.
patent: 3821608 (1974-06-01), Johansson et al.
patent: 4227229 (1979-03-01), Imataki
patent: 4234902 (1980-11-01), Fujiwara et al.

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