Circuit-breaker with an explosive charge ignited during opening

Details Circuit-breaker with an explosive charge ignited during opening Circuit-breaker with an explosive charge ignited during opening

1999-04-13

2000-08-22

Scott, J. R.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

218 43, 218 57, 218 60, 218 65, 218 85, H01H 3304, H01H 930, H01H 3388

Patent

active

061075906

ABSTRACT:
Extending between a fixed tulip contact (1) and a slide tulip (4) is an arcing chamber (5) which is occupied in the closed position by a movable contact pin (3) which fills up both an exhaust (9) surrounded by the slide tulip (4) and a blowout opening (7) which is surrounded by the tulip contact (1) and connects the arcing chamber (5) to a pressure chamber (6). The arcing chamber (5) is surrounded by an annular heating volume (13) open toward the same. Arranged in the pressure chamber (6) is a charge (10) of explosive which is for the most part converted within approximately 10-30 ms after ignition to extinguishing gas, preferably predominantly nitrogen, the gas pressure moving the contact pin (3) toward the open position. After clearance of the blowout opening (7) and the exhaust (9), the arc drawn between the contact pin (3) and tulip contact (1) is blown out, something which is supported by the pressure buildup, to which the arc contributes, in the heating volume (13). The pressure chamber with the charge can also surround the arcing chamber in an annular fashion. In this case, it is also possible to support the opening movement by the explosion pressure, for example, via pistons.

REFERENCES:
patent: 3704354 (1972-11-01), Lagofun
patent: 4250365 (1981-02-01), McConnell
patent: 4354072 (1982-10-01), Noeske
patent: 4563556 (1986-01-01), Goldstein
patent: 5359174 (1994-10-01), Smith et al.
patent: 5828026 (1998-10-01), Bruhl et al.

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