Switching unit for a circuit breaker having a rocker lever
AssigneeABB Schweiz AG
InventorSiegfried Mayer
Life of this patent
Estimating the term…
Abstract
An exemplary switching unit is disclosed for operation of a rocker lever of a circuit breaker, which is provided on the circuit breaker. The switching unit has a drive unit with a free-play distance, such that a slide of the drive unit, which slide is intended for operation of the rocker lever, does not impede the movement of the rocker lever.
Claims19
A switching unit for operation of a rocker lever of a circuit breaker, comprising:
- a drive unit which has at least one driven first element which is configured to move linearly through a distance, and a second element, which is configured to move freely through a free-play distance with respect to the first element;
- and
- a rocker lever connected to the drive unit,
- wherein the free-play distance is selected to ensure that operation of the rocker lever is not impeded by the switching unit, and
- wherein the rocker lever is configured to move through a fault movement distance from an “on” position in the direction of an “off” position, and the free-play distance is at least equal to the fault movement distance.
A circuit breaker, comprising:
- a rocker lever having a switching unit, which is fitted to the circuit breaker for operation of the rocker lever, wherein the switching unit includes:
- a drive unit which has at least one driven first element which can be moved linearly through a distance,
- wherein the drive unit has a second element, which can move freely through a free-play distance with respect to the first element,
- wherein the free-play distance is selected to ensure that operation of the rocker lever is not impeded by the switching unit, and
- wherein the rocker lever of the switching unit is configured to be moved through a fault movement distance from an “on” position in the direction of an “off” position, and the free-play distance is at equal to the fault movement distance.
A method for operation of a switching unit for operation of a rocker lever of a circuit breaker, wherein the switching unit includes a drive unit which has at least one driven first element which can be moved linearly through a distance, wherein the drive unit has a second element, which can move freely through a free-play distance with respect to the first element, and wherein the free-play distance is selected to ensure that operation of the rocker lever is not impeded by the switching unit, the method comprising:
- moving the first element with catching of the second element being driven in a switching-on direction until the rocker lever reaches an “on” position;
- moving the first element through a free-play distance in a switching-off direction, with the second element not being moved;
- in an event of a fault, moving the rocker lever of the switching unit through a fault movement distance from an “on” position in the direction of an “off” position;
- and
- selecting the free-play distance to be at least equal to the fault movement distance.
Dependencies are inferred from the claim text.