Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
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.
Itoh Takaaki
Tanaka Yoshiyuki
Broome Harold
Mitsubishi Materials Corporation
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