Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1987-04-23
1988-04-05
Macon, Robert S.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361137, H02H 704
Patent
active
047362723
ABSTRACT:
There is disclosed a current-limiting arcing horn comprising a current-limiting unit and a ring horn. The current-limiting unit is composed of lower and upper electrodes, at least one nonlinear resistor element mounted between the electrodes, and an insulating member made of an insulation. The insulating member encloses the electrodes and the nonlinear resistor element. The insulating member has a certain length which is 1.5 to 3.0 times as long as the length of the nonlinear resistor element. The creepage distance of the surface of the insulating means is 1.5 to 3.0 times as long as the length of the insulating member. The grounding electrode of the current-limiting unit is fixed to the earthside base of an insulator that holds an insulated wire. The ring horn is mounted to the upper electrode. An air gap is formed between the ring horn and the insulated wire to permit a flashover by lightning surge across the gap.
REFERENCES:
patent: 4467387 (1984-08-01), Bergh et al.
Kato Kazuaki
Nagasaka Hiromi
Macon Robert S.
NGK Insulators Ltd.
Rudisill Stephen G.
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