US 10,896,789 B2Granted

Electrical switch

AssigneeABB AB

InventorsFredrik Strand, Juha Soldan, Jukka Lintamo, Mikko Välivainio

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Abstract

An electrical switch. The electrical switch comprises at least one fixed contact, a movable contact contacting the fixed contact, and at least one extinguishing apparatus positioned after the fixed contact in an opening direction of the movable contact. A permanent magnet is further positioned after the extinguishing apparatus in the opening direction of the movable contact.

Claims18

Dependent claims

An electrical switch comprises

a first fixed contact and a second fixed contact positioned opposite to and at a distance from the first fixed contact,
a first shutter element positioned in connection with the first fixed contact, and a second shutter element positioned in connection with the second fixed contact,
a movable contact having a rotational axis positioned in a middle portion of the movable contact, the rotational axis of the movable contact being positioned between the first fixed contact and the second fixed contact, the movable contact being rotatable between a closed position in which a first outer end of the movable contact makes contact to the first fixed contact and a second outer end opposite to the first outer end of the movable contact makes contact to the second fixed contact and an open position in which the movable contact is electrically isolated from the first fixed contact and the second fixed contact,
a first extinguishing apparatus positioned after the first fixed contact in an opening direction of the movable contact, whereby the first outer end of the movable contact passes through the first extinguishing apparatus when the movable contact is rotated from the closed position to the open position and vice a versa,
a second extinguishing apparatus positioned after the second fixed contact in an opening direction of the movable contact, whereby the second outer end of the movable contact passes through the second extinguishing apparatus when the movable contact is rotated from the closed position to the open position and vice a versa,
a first permanent magnet positioned after the first fixed contact in an opening direction of the movable contact,
a second permanent magnet positioned after the second fixed contact in an opening direction of the movable contact,
wherein
the first permanent magnet is positioned after the first extinguishing apparatus in the opening direction of the movable contact,
the second permanent magnet is positioned after the second extinguishing apparatus in the opening direction of the movable contact, and
each of the first and second shutter elements being movable in synchronism with the movable contact between an extended position in which the shutter elements are positioned between a respective fixed contact and a respective extinguishing apparatus when the movable contact is in the open position and a contracted position in which the shutter elements are positioned outside a patch of the movable contact allowing the movable contact to turn from the open position to the closed position.

8 more elements

Dependencies are inferred from the claim text.

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Abstract

An electrical switch comprises

a first fixed contact and a second fixed contact positioned opposite to and at a distance from the first fixed contact,
a first shutter element positioned in connection with the first fixed contact, and a second shutter element positioned in connection with the second fixed contact,
a movable contact having a rotational axis positioned in a middle portion of the movable contact, the rotational axis of the movable contact being positioned between the first fixed contact and the second fixed contact, the movable contact being rotatable between a closed position in which a first outer end of the movable contact makes contact to the first fixed contact and a second outer end opposite to the first outer end of the movable contact makes contact to the second fixed contact and an open position in which the movable contact is electrically isolated from the first fixed contact and the second fixed contact,
a first extinguishing apparatus positioned after the first fixed contact in an opening direction of the movable contact, whereby the first outer end of the movable contact passes through the first extinguishing apparatus when the movable contact is rotated from the closed position to the open position and vice a versa,
a second extinguishing apparatus positioned after the second fixed contact in an opening direction of the movable contact, whereby the second outer end of the movable contact passes through the second extinguishing apparatus when the movable contact is rotated from the closed position to the open position and vice a versa,
a first permanent magnet positioned after the first fixed contact in an opening direction of the movable contact,
a second permanent magnet positioned after the second fixed contact in an opening direction of the movable contact,
wherein
the first permanent magnet is positioned after the first extinguishing apparatus in the opening direction of the movable contact,
the second permanent magnet is positioned after the second extinguishing apparatus in the opening direction of the movable contact, and
each of the first and second shutter elements being movable in synchronism with the movable contact between an extended position in which the shutter elements are positioned between a respective fixed contact and a respective extinguishing apparatus when the movable contact is in the open position and a contracted position in which the shutter elements are positioned outside a patch of the movable contact allowing the movable contact to turn from the open position to the closed position.

8 more elements