Sensing structure for component wear in high voltage circuit int

Details Sensing structure for component wear in high voltage circuit int Sensing structure for component wear in high voltage circuit int

1994-04-05

1995-09-26

Scott, J. R.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218 48, 218 53, 218 57, 218 62, 218 63, 218 72, 218 74, H01H 3370, H01H 3388

Patent

active

054535913

ABSTRACT:
A vaporizable material, for example, a silicone, that is buried beneath the surface of a Teflon nozzle for a sulfur hexafluoride power circuit breaker in an area of the nozzle which is exposed to abrasion and wear due to arc products. In a similar manner, aluminum or titanium or some other vaporizable material is buried beneath the surface of the contact of the circuit interrupter which is exposed to abrasion and wear. When the buried layers are exposed due to abrasion of their covering surfaces, these materials will be vaporized and their presence will be sensed by sensors within the circuit interrupter, thus revealing some predetermined degree of wear of the surfaces of the nozzle and contact and other surfaces within the circuit interrupter which may also be subject to abrasion by arcing or arc products. When aluminum is used as the vaporizable material for the contact, it also senses the presence of flashover to aluminum exterior housings.

REFERENCES:
patent: 3665134 (1972-05-01), Fischer
patent: 3721786 (1973-03-01), Yoshioka
patent: 3842226 (1974-10-01), Yoon
patent: 4236053 (1980-11-01), Sasaki et al.
patent: 4412115 (1983-10-01), Ukuno
patent: 4418256 (1983-11-01), Graf
patent: 4420662 (1983-12-01), Niemeyer et al.
patent: 4445019 (1984-04-01), Gaupp et al.
patent: 4467158 (1984-08-01), Kobayashi et al.

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