Switching device
AssigneeABB AB
InventorsHarri Mattlar, Aki Suutarinen, Rainer Kolmonen
Life of this patent
Estimating the term…
Abstract
A switching device having a frame, in which an actuator adapted to rotate a main shaft of the switching device and rotatable around an axis of rotation, the actuator having a 0 position, an I position and a first dead point between the 0 position and the I position, the I position being located by a given angle (α6) in a first direction relative to the 0 position. The actuator also has a testing position, the testing position being located by a predetermined angle (β6) in a second direction relative to the 0 position, the second direction being opposite relative to the first direction.
Claims20
A switching device comprising a frame, in which an actuator and a spring means are installed,
- the actuator being adapted to rotate a main shaft of the switching device and being rotatable around an axis of rotation, the actuator having a 0 position, an I position and a first dead point between the 0 position and the I position, the I position being located by a given angle (α6) in a first direction relative to the 0 position, and
- the spring means being comprised of one or more working springs each including a first end supported by the frame, and a second end, the spring means rotate the actuator, when the actuator is between the 0 position and the I position, towards the 0 position or the I position depending on which side of said first dead point the actuator is,
- wherein the actuator also has a testing position, the testing position being located by a predetermined angle (β6) in a second direction relative to the 0 position, said second direction being opposite relative to said first direction.
Dependencies are inferred from the claim text.