Electrical switch

Patent metadata

Field	Value
Publication number	US-2019326083-A1
Application number	US-201916386641-A
Country	US
Kind code	A1
Filing date	Apr 17, 2019
Priority date	Apr 24, 2018
Publication date	Oct 24, 2019
Grant date	—

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

1 . An electrical switch comprises
at least one fixed contact, a movable contact being movable between a closed position in which the movable contact makes contact to the fixed contact and an open position in which the movable contact is electrically isolated from the fixed contact, and at least one shutter element being movable in synchronism with the movable contact between an extended position in which the shutter element is positioned between the 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 the patch of the movable contact to turn from the open position to the closed position.

2 . The electrical switch according to claim 1 , wherein an extinguishing apparatus is positioned after the fixed contact in an opening direction of the movable contact so that an outer end of the movable contact passes through the extinguishing apparatus when the movable contact is moved from the closed position to the open position and vice a versa, whereby
the shutter element is positioned in the extended position between the fixed contact and the extinguishing apparatus when the movable contact is in the open position, and in the contracted position outside the patch of the movable contact allowing the movable contact to turn from the open position to the closed position.

3 . The electrical switch according to claim 2 , wherein a permanent magnet is positioned after the extinguishing apparatus in the opening direction of the movable contact.

4 . The electrical switch according to claim 3 , wherein the permanent magnet is positioned outside the path of the outer end of the movable contact when the movable contact moves between the closed position and the open position.

5 . The electrical switch according to claim 1 , wherein the movable contact is a rotatable contact having a rotational axis positioned in the middle portion of the rotatable contact.

6 . The electrical switch according to claim 5 , wherein a first fixed contact is positioned opposite to and at a distance from a second fixed contact, the rotational axis of the rotatable contact being positioned between the first fixed contact and the second fixed contact.

7 . The electrical switch according to claim 5 , wherein the rotatable contact comprises at least one pair of longitudinal blades being flexible connected to each other.

8 . The electrical switch according to claim 7 , 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 a closed position.

9 . The electrical switch according to claim 6 , wherein
a first extinguishing apparatuses 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.

10 . The electrical switch according to claim 6 , wherein
a first shutter element is positioned in connection with the first fixed contact, a second shutter element is positioned in connection with the second fixed contact, each shutter element being movable in synchronism with the rotatable contact between an extended position in which the shutter element is positioned between the respective fixed contact and the respective extinguishing apparatus when the rotatable contact is in the open position and a contracted position in which the shutter element is positioned outside the patch of the movable contact allowing the movable contact to turn from the open position to the closed position.

11 . The electrical switch according to claim 9 , 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.

12 . 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.

13 . The electrical switch according to claim 12 , wherein the movable contact is supported on a rotatable roller and the roller is rotatable supported in the side panels of the housing.

14 . The electrical switch according to claim 13 , wherein an inner end of the shutter element is supported with an articulated joint on the roller.

15 . The electrical switch according to claim 14 , wherein an outer end of the shutter element is positioned in guide grooves formed in the side panels of the housing.

16 . The electrical switch according to claim 2 , wherein the movable contact is a rotatable contact having a rotational axis positioned in the middle portion of the rotatable contact.

17 . The electrical switch according to claim 15 , wherein a first fixed contact is positioned opposite to and at a distance from a second fixed contact, the rotational axis of the rotatable contact being positioned between the first fixed contact and the second fixed contact.

18 . The electrical switch according to claim 6 , wherein the rotatable contact comprises at least one pair of longitudinal blades being flexible connected to each other.

19 . The electrical switch according to claim 18 , 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 a closed position.

20 . The electrical switch according to claim 7 , wherein
a first extinguishing apparatuses 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.

Assignees

• Abb Oy

Inventors

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

Classifications

• H01H9/443

  using permanent magnets · CPC title

• H01H33/14

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

• H01H33/06 Primary

  Insulating body insertable between contacts · CPC title

• H01H33/08

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

• H01H33/64

  wherein the break is in gas (vacuum switches H01H33/66) · CPC title