Compressed gas-blast circuit breaker

Details Compressed gas-blast circuit breaker Compressed gas-blast circuit breaker

1995-07-24

1996-11-26

Scott, J. R.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218 62, 218 63, 218 84, H01H 3342, H01H 33915

Patent

active

055788068

ABSTRACT:
The compressed gas-blast circuit breaker includes two moving contact members (1, 2) which are guided to move counter to one another along an axis (3) in a chamber which is filled with insulating gas. These contact members each have an arcing contact (8, 9) and a main current contact (6, 7). An insulating nozzle (10) mounted on a contact member (1) is moved directly by a drive, and compressed gas is passed, during disconnection, through the constriction (11) in the insulating nozzle (10) into an exhaust space (14) from a pressure space (12), which is independent of the switching travel, and/or from a compression space (19), which is operated by the contact members. Drive force is passed to a contact member (2), which absorbs force, from the directly-driven contact member (1), through an insulating part and a speed converter. During disconnection, if the functionally essential parts of the force-absorbing contact member (2), such as the arcing contact (9), the main current contact (7) and the shields, are suitably driven, it forms an insulating path, which can be highly stressed dielectrically, in a short time while optimally using a comparatively small drive force.

REFERENCES:
patent: 3814883 (1974-06-01), Milianowicz
patent: 4211902 (1980-07-01), Tsuchida
patent: 4289942 (1981-09-01), Milianowicz
patent: 4675484 (1987-06-01), Ischi et al.
patent: 4678878 (1987-07-01), Beier
patent: 4935590 (1990-06-01), Malkin et al.
patent: 4973806 (1990-11-01), Kirchesch et al.
patent: 5478980 (1995-12-01), Freeman et al.
K. Suzuki et al., "Development of 550kV 1-Break GCB (Part 1) Investigation of Interrupting Chamber Performance", IEEE, pp. 1-8 (1992).

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