Back to results
US 9,437,376 B2Granted
Electric current switching apparatus
AssigneeABB AB
InventorsHarri Mattlar, Mikko Välivainio
Life of this patent
Estimating the term…
Abstract
An electric switch includes a movable contact, a stationary contact to be contacted by the movable contact, one or more quenching plates, and a permanent magnet for directing an arc, which is formed when the contacts are separated from each other, to the quenching plate. The quenching plate has a base portion and side portions extending away from the base portion. The permanent magnet is arranged such that the arc is directed towards one of the side portions of the quenching plate.
Claims15
An electric switch, comprising:
- a movable contact;
- a stationary contact for being contacted by the movable contact;
- at least one quenching plate;
- and
- a permanent magnet for directing an arc, which is formed when the contacts are separated from each other, to the at least one quenching plate,
- wherein the at least one quenching plate has a base portion and side portions extending from the base portion, and the permanent magnet is placed closest to the base portion of the at least one quenching plate such that the side portions extending from the base portion of the at least one quenching plate extend away from the permanent magnet in a direction opposite to the permanent magnet,
- wherein the permanent magnet is arranged behind the at least one quenching plate such that the base portion of the at least one quenching plate resides between the permanent magnet and a quenching area of the at least one quenching plate, the quenching area being defined between the side portions of the at least one quenching plate, and
- wherein the permanent magnet is arranged to direct the arc towards one of the side portions of the at least one quenching plate.
5 more elements
Dependencies are inferred from the claim text.