Spring operated actuator for an electrical switching apparatus
AssigneeABB Technology AG
InventorsDaniel Staffas, Johannes Tredoux, Mats Holman
Life of this patent
Estimating the term…
Abstract
A spring operated actuator for an electrical switching apparatus. The actuator has a main shaft transmitting the actuation movement to the switching apparatus and has opening spring means and closing spring means. The opening spring means includes an opening torsion spring and the closing means includes a closing torsion spring. The axes of the torsion springs extend in the same direction and at a distance from each other that is less than 20% of the external opening spring diameter.
Claims19
A spring operated actuator for an electrical switching apparatus, the spring operated actuator comprising:
- a rotary drive main shaft arranged to transmit an actuating movement to the switching apparatus,
- an opening spring device, and
- a closing spring device,
- wherein said opening spring device includes at least one opening torsion spring, defining an opening spring axis and an external opening spring diameter,
- wherein said closing spring device includes at least one closing torsion spring, defining a closing spring axis, which axes extend in the same direction, each of said opening torsion spring and said closing torsion spring defining a respective winding direction and an unwinding direction, and each of said opening torsion spring and said closing torsion spring is arranged to be charged with mechanical energy in the unwinding direction and to discharge mechanical energy in the winding direction, and in that the axes extend at a distance from each other that is smaller than 20% of the external opening spring diameter.
A spring operated actuator for an electrical switching apparatus, the spring operated actuator comprising:
- a rotary drive main shaft arranged to transmit an actuating movement to the switching apparatus,
- an opening spring device, and
- a closing spring device,
- wherein said opening spring device includes at least one opening torsion spring, defining an opening spring axis and an external opening spring diameter,
- wherein said closing spring device includes at least one closing torsion spring, defining a closing spring axis, which axes extend in the same direction at a distance from each other that is smaller than 20% of the external opening spring diameter;
- wherein the axes are substantially aligned, the aligned spring axes extend in the same direction as the axis of the main shaft, and the axis of the main shaft is aligned with the spring axes.
An electrical switching apparatus comprising:
- a spring operated actuator, the spring operated actuator including a rotary drive main shaft arranged to transmit an actuating movement to the switching apparatus,
- an opening spring device, and
- a closing spring device,
- wherein the opening spring device includes at least one opening torsion spring, defining an opening spring axis and an external opening spring diameter, and
- wherein the closing spring device includes at least one closing torsion spring, defining a closing spring axis, the opening spring axis and the closing spring axis extend at a distance from each other that is smaller than 20% of the external opening spring diameter.
Dependencies are inferred from the claim text.