Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1976-04-23
1979-02-13
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148A, 200148C, 200148G, H01H 3382, H01H 3300
Patent
active
041397525
ABSTRACT:
An improved gas-type circuit-interrupter is provided having a pair of separable contacts, which establish an arc upon separation within a confined casing having a nozzle structure. The arrangement is such that during the initial portion of the opening operation of the interrupter, the established arc generates gas pressure, due to the hot arc energy developed in the arc, and this high-pressure gas is then stored within an adjacently-provided gas-storage region. At a later point in time in the opening operation, when, preferably, the current flow through the interrupter approaches its low instantaneous-current value, the aforesaid accumulated gas pressure, contained within said gas-storage region, returns in a gas flow to the arc, and effects the extinction thereof during such low instantaneous values of arcing current.
As an auxiliary piece of equipment, a mechanically-operated gas-puffer device, including an operating cylinder movable, for example, over a stationary piston structure generates additional augmenting gas pressure, which assists the aforementioned high-pressure gas stored and accumulated within the aforesaid gas-storage region.
In yet a further embodiment, one-way-acting valves, associated with the aforesaid gas-piston chamber, prevent entrance, or flow of the piston-generated gas within the piston chamber until the gas pressure within the piston chamber drops to a predetermined extent within the nozzle-structure interrupting region ofthe substantially-confined casing.
REFERENCES:
patent: 3010003 (1961-11-01), Pucher
patent: 3045087 (1962-07-01), Duffing
patent: 3100248 (1963-08-01), Forwald
patent: 3641295 (1972-02-01), Ferton et al.
patent: 3659065 (1972-04-01), Roidt et al.
patent: 3985988 (1976-10-01), Korner et al.
Itai Kosaku
Ueda Yoshihiro
Elchik W. A.
Macon Robert S.
Mitsubishi Denki & Kabushiki Kaisha
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