Electric overvoltage arrester with carbon air gap and gas tube

Details Electric overvoltage arrester with carbon air gap and gas tube Electric overvoltage arrester with carbon air gap and gas tube

1975-04-25

1977-01-11

Miller, J D

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

317 62, 337 32, H02H 906

Patent

active

040029522

ABSTRACT:
The invention concerns overvoltage arresters and its basic objective is to combine a carbon air gap device with a novel and improved surge voltage gas tube, the combination also including a fusible element and a coil spring. The coil spring becomes effective upon melting of the fusible element to connect the transmission line to ground so as to short out both the carbon air gap device and the gas tube thereby preventing overheating of the same. The carbon air gap device and the gas tube are so combined as to obtain the advantages of both, namely the long life advantages of the gas tube and the reliability of the carbon air gap device. The two devices are combined in such a manner whereby the carbon air gap device is a back-up for the surge voltage gas tube.

REFERENCES:
patent: 1201646 (1916-10-01), Steinmetz
patent: 1294466 (1919-02-01), Houskeeper
patent: 2637827 (1953-05-01), Boyer et al.
patent: 2792471 (1957-05-01), Baxter et al.
patent: 3569786 (1971-03-01), Kunugi
patent: 3626237 (1971-12-01), Bolton et al.
patent: 3703665 (1972-11-01), Yereance et al.
patent: 3886411 (1975-05-01), Klayum

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