Microgap type surge absorber

Details Microgap type surge absorber Microgap type surge absorber

1991-11-26

1993-02-02

Broome, Harold

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

337 34, 361118, H01H 904, H01H 906

Patent

active

051842734

ABSTRACT:
A microgap type surge absorber comprises a columnar insulator element being covered with a conductive material and provided with a microgap around the center thereof, a pair of conductive caps being fixed on the both ends of the element, first and second electrodes being attached to the both caps, first and second glass tubes adhering to the periphery of the first and second electrodes and surrounding the end parts of the element, and a cylindrical third electrode being held between the both glass tubes and adjacently surrounding the element containing the microgap. The first, second, and third electrodes and glass tubes are charged with inert gas. When a glow discharge started from near the microgap extends to the conductive coating and arrives at the caps, an arc discharge is formed between caps through the third electrode. The third electrode protects the microgap from arc discharge current.

REFERENCES:
patent: 4317155 (1982-02-01), Harada et al.
patent: 4433354 (1984-02-01), Lange et al.

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