Electrical switch

Patent metadata

Field	Value
Publication number	US-10804056-B2
Application number	US-201916386641-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	Apr 24, 2018
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

An electrical switch. The electrical switch includes at least one fixed contact and a movable contact contacting the fixed contact. At least one shutter element is arranged to move in synchronism with the movable contact. The shutter element is positioned in an extended position between the fixed contact and the movable contact and in a contracted position outside the patch of the movable contact allowing the movable contact to turn from the open position to the closed position.

First claim

The invention claimed is:

1. 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 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 shutter element positioned in connection with the first fixed contact,
a second shutter element positioned in connection with the second fixed contact,
each shutter element being movable in synchronism with the movable contact between an extended position in which the shutter element is positioned between a respective fixed contact and the movable contact when the movable contact is in the open position, and a contracted position in which the shutter element is positioned outside a path of the movable contact to turn from the open position to the closed position.

2. The electrical switch according to claim 1 , wherein the rotatable contact comprises at least one pair of longitudinal blades being flexible connected to each other.

3. The electrical switch according to claim 2 , wherein a contact portion of the first fixed contact is received between the blades in a first outer end of the rotatable contact and a contact portion of the second fixed contact is received between the blades in a second outer end of the rotatable contact when the electrical switch is in the closed position.

4. The electrical switch according to claim 1 , wherein
a first extinguishing apparatus is positioned after the first fixed contact in the opening direction of the rotatable contact,
a second extinguishing apparatus is positioned after the second fixed contact in the opening direction of the rotatable contact.

5. The electrical switch according to claim 4 , wherein
each shutter element is in the extended position positioned between the respective fixed contact and a respective extinguishing apparatus when the rotatable contact is in the open position and in the contracted position positioned outside the path of the movable contact allowing the movable contact to turn from the open position to the closed position.

6. The electrical switch according to claim 4 , wherein
a first permanent magnet is positioned after the first extinguishing apparatus in the opening direction of the rotatable contact,
a second permanent magnet is positioned after the first extinguishing apparatus in the opening direction of the rotatable contact.

7. The electrical switch according to claim 1 , wherein the fixed contacts and/or the movable contact and/or the extinguishing apparatuses and/or the permanent magnets are enclosed in a housing comprising two opposite side panels and four side walls connecting peripheral edges of the side panels, a connection portion of the first fixed contact passing through a first side wall and a connection portion of the second fixed contact passing through a second side wall being opposite to and spaced apart from the first side wall in a longitudinal direction of the housing.

8. The electrical switch according to claim 7 , wherein the movable contact is supported on a rotatable roller and the roller is rotatable supported in the side panels of the housing.

9. The electrical switch according to claim 8 , wherein an inner end of the shutter element is supported with an articulated joint on the roller.

10. The electrical switch according to claim 9 , wherein an outer end of the shutter element is positioned in guide grooves formed in the side panels of the housing.

Assignees

• Abb Oy

Inventors

• Strand Fredrik
• Välivainio Mikko
• Lintamo Jukka
• Soldan Juha

Classifications

• H01H9/443

  using permanent magnets · CPC title

• H01H1/2041

  Rotating bridge · CPC title

• H01H33/08

  Stationary parts for restricting or subdividing the arc, e.g. barrier plate · CPC title

• H01H33/10

  Metal parts · CPC title

• H01H33/14

  Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc · CPC title