Electrical switch
AssigneeABB AB
InventorsWolfgang Suess, Erwin Muders, Klaus-Peter Eppe, Ralf Wieland
Life of this patent
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Abstract
An electrical switch with a main current path and an auxiliary current path comprises a first stationary contact piece, a first moveable contact piece, a contact lever, a second stationary contact piece, a second moveable contact piece, a contact carrier, a toggle switch, a first intermediate lever, a control lever, a second intermediate lever, a latching lever, a release lever configured to form a latching connection with the latching lever at a latching point, and a tripping spring.
Claims5
1-3. (canceled)
An electrical switch with a main current path and an auxiliary current path comprising:
- a first stationary contact piece;
- a first moveable contact piece moveable to contact the first stationary contact piece at a main contact point so as to close the main current path;
- a contact lever disposed pivotably on a first fixed rotary spindle and having a first arm and a second arm, wherein the first moveable contact piece is disposed on the first arm;
- a second stationary contact piece;
- a second moveable contact piece moveable to contact the second stationary contact piece at an isolating contact point so as to close the auxiliary current path, wherein a current is commutated from the main current path to the auxiliary current path in an event of a short circuit;
- a contact carrier disposed pivotably on a second fixed rotary spindle, wherein the second moveable contact piece is disposed on the contact carrier;
- a toggle switch configured to actuate the main and isolating contact points;
- a first intermediate lever having a first end and a second end;
- a control lever having a first end pivotably to the first end of the first intermediate lever via a pivot pin and a second end configured to act on the second arm of the contact lever;
- a second intermediate lever pivotably connected at a first end to the second end of the first intermediate lever via a link pin and at a second end to the toggle switch;
- a latching lever mounted rotatably and having a slot, wherein the link pin is moveably disposed in the slot;
- a release lever configured to form a latching connection with the latching lever at a latching point;
- and
- a tripping spring configured to act on the pivot pin with a main force, wherein the main force includes a first partial force component acting on the latching point and a second partial force component acting on the control lever in a direction of tripping the main contact point, wherein the second partial force component is greater than the first partial force component.
Dependencies are inferred from the claim text.