Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1987-11-13
1988-09-27
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148R, 200148B, H01H 3316
Patent
active
047743875
ABSTRACT:
A high-tension circuit-breaker having a circuit-breaking chamber filled with a dielectric gas under pressure and including a resistance disposed coaxially with the circuit-breaking chamber and an insertion device for inserting said resistance into the circuit protected by the circuit-breaker while the circuit-breaker is closing, said insertion device being placed inside the circuit-breaking chamber and including a resistance-inserting contact in electrical contact with one end of the resistance, the circuit-breaker including the improvement of a base (22) at one of its ends, said base being closed by a first cover (51), with said resistance (4) being disposed in a cylindrical housing (60) which is fixed to said base, said housing being closed by a second cover (70), the first cover being provided with a central opening constituting a seat for a first valve plate (83) which is biased by a first spring (85), the second cover being provided with a central opening constituting a seat for a second valve plate (91) which is biased by a second spring (93), the valve plates being associated with means for keeping them open against the bias of the springs when the housing (60) is in the position on the base, and for closing them when the housing is at a distance from the base, said means providing the electrical connection between said resistance (4) and said resistance-inserting contact (3A), the housing co-operating in sealed manner with the first cover while being disassembled therefrom in such a manner as to prevent air from being admitted into the space lying between the covers until the valves are closed.
REFERENCES:
patent: 4421962 (1983-12-01), Thuries et al.
patent: 4500762 (1985-02-01), Yoshizumi
Alsthom
Macon Robert S.
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