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US 5,451,731 AGranted
Circuit breaker and driving mechanism thereof
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsToshiaki Yoshizumi, Mikio Hidaka
Life of this patent
Estimating the term…
Abstract
In a double-break type circuit breaker having resistor contacts which are to be connected in parallel with main contacts in not only closing operation but also breaking operation, the resistor contacts are opened by a force due to loading of elastic members in the breaking operation and the elastic members are loaded for storing the driving force In the closing operation.
Claims10
A circuit breaker comprising:
- a tank having a long axis along an axial direction and filled with an insulation gas;
- two main contacts, each main contact comprising a main moving contact and a stationary main contact, which are electrically connected in series and are provided in said tank in a manner such that the main moving contacts of said main contacts are driven in the axial direction of said tank, relative to said tank, for contacting and departing from the stationary main contacts of said main contacts;
- first and second resistor contacts, each resistor contact comprising series connections of resistors and a movable resistor contact, each of the first and second resistor contacts is electrically connected in parallel with one of said two main contacts when the main contacts and the first and second resistor contacts are closed;
- first and second insulation operation rods each having first and second ends and to be driven in a direction that is perpendicular to the axial direction and provided in said tank between said two main contacts;
- first and second first link mechanisms, the first link mechanism coupled to the first end of the first insulation operation rod and to one of the main contacts, the second first link mechanism coupled to the first end of the second insulation operation rod and to the other one of the main contacts,
- driving means for driving the insulation operation rods;
- first and second second link mechanisms, coupling the second ends of the first and second insulation operation rods, respectively, to said driving means;
- means for loading the first and second resistor contacts for maintaining the first and second resistor contacts in a closed position, said means for loading comprising elastic members;
- first and second third link mechanisms, coupled to the first and second insulation operation rods, respectively, for closing the first and second resistor contacts prior to the closing of said two main contacts and for loading the elastic members using the driving forces provided by said driving means when said two main contacts are driven for closing by said driving means, via said insulation operation rods;
- a fourth link mechanism for holding loaded said elastic members;
- coupling means for coupling said third link mechanisms to said fourth link mechanism;
- and
- releasing means for releasing the load on said elastic members by said fourth link mechanisms, thereby breaking said first and second resistor contacts after the breaking of said two main contacts, when said first and second insulation operation rods are driven in a manner to break said two main contacts.
10 more elements
In a circuit breaker comprising a tank having a first axis, main contacts, and resistor contacts including resistors, further comprising:
- an insulation holder that is fixed to said tank, wherein said main contacts and said resistor contacts are held perpendicular to said first axis of said tank by said insulation holder;
- an insulation spacer, wherein an end of each of said resistors of said resistor contacts is fixed on said tank via said insulation spacer;
- a connection conductor having a connection conductor end, wherein said connection conductor end is disposed in parallel with said resistors and is fixed on said tank via said insulation spacer;
- a first movable conductive connection part, wherein a main stationary contact of said main contact and said conductor are connected by said first movable conductive connection part;
- and
- a second movable conductive connection part, wherein a resistor stationary contact of said resistor contact and said resistors are connected by said second movable conductive connection part.
3 more elements
A driving mechanism of a circuit breaker for breaking and closing a switching part, comprising:
- a frame;
- a first coupling member that is rotatably held on the frame at a first point;
- a second coupling member that is rotatably held on the frame at a second point;
- a first pair of adapters that are located along a line between the first and second coupling members;
- a first pair of torsion bars, each torsion bar of the first pair having first and second ends, the first ends of the first pair of torsion bars are spaced from one another and held by the first coupling member so that the first ends of the first pair of torsion bars are equidistant from the first point, the second ends of the first pair of torsion bars are spaced from one another and held by the first pair of adapters;
- a second pair of torsion bars, each torsion bar of the second pair having first and second ends, the first ends of the first pair of torsion bars are spaced from one another and held by the second coupling member so that the first ends of the second pair of torsion bars are equidistant from the second point, the second ends of the first pair of torsion bars are spaced from one another and held by the first pair of adapters.
3 more elements
Dependencies are inferred from the claim text.