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AssigneeGE Vernova Infrastructure Technology LLC
InventorsPeter Von Allmen, Marius Gacond, Martin Walt
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An actuating mechanism for a circuit breaker includes a first piston movable in a first cylinder, against the force of a first compressible member, by admitting hydraulic fluid, and a second piston movable in a second cylinder, against the force of a second compressible member, by admitting hydraulic fluid. Hydraulic fluid can transferred from the second cylinder into the first cylinder via an interconnecting fluid passage, and released from the first cylinder via an outlet fluid passage. The first piston is arranged to be connected to a circuit breaker in a switchgear so as to open and close it. Importantly, the first piston is directly mechanically connected to the first compressible member, ensuring that all the energy stored in the compressible member is available to open the circuit breaker.
An actuating mechanism for a circuit breaker comprising an opening accumulator comprising a first piston, a first cylinder and a first compressible member, the first piston being movable in the first cylinder, against a force of the first compressible member, from a discharged position to a charged position by admitting hydraulic fluid, and movable to return, under the force of the first compressible member, to the discharged position by releasing the hydraulic fluid, wherein the first piston is directly mechanically connected to the first compressible member, and wherein the first cylinder is connected to an outlet fluid passage which can be opened and closed, the actuating mechanism further comprising a closing accumulator comprising a second piston, a second cylinder and a second compressible member, the second piston being movable in the second cylinder, against a force of the second compressible member, from a discharged position to a charged position by admitting hydraulic fluid, and to return, under the force of the second compressible member, to the discharged position by releasing the hydraulic fluid, wherein the first cylinder and the second cylinder are connected by an interconnecting fluid passage which can be opened and closed, arranged such that when the outlet fluid passage is closed and the interconnecting fluid passage is opened, hydraulic fluid released from the second cylinder will be admitted into the first cylinder to move the first piston to the charged position.
An actuating mechanism for a circuit breaker comprising an opening accumulator comprising a first piston, a first cylinder and a first compressible member, the first piston being movable in the first cylinder, against a force of the first compressible member, from a discharged position to a charged position by admitting hydraulic fluid, and movable to return, under the force of the first compressible member, to the discharged position by releasing the hydraulic fluid, wherein the first piston is directly mechanically connected to the first compressible member, and wherein the first cylinder is connected to an outlet fluid passage which can be opened and closed, the actuating mechanism further comprising a closing accumulator comprising a second piston, a second cylinder and a second compressible member, the second piston being movable in the second cylinder, against a force of the second compressible member, from a discharged position to a charged position by admitting hydraulic fluid, and to return, under the force of the second compressible member, to the discharged position by releasing the hydraulic fluid, wherein the first cylinder and the second cylinder are connected by an interconnecting fluid passage which can be opened and closed, arranged such that when the outlet fluid passage is closed and the interconnecting fluid passage is opened, hydraulic fluid released from the second cylinder will be admitted into the first cylinder to move the first piston to the charged position, characterised in that the second compressible member has a higher stiffness than the first compressible member.
Dependencies are inferred from the claim text.