Splitter plate, arc extinguishing chamber and switching device

Patent metadata

Field	Value
Publication number	US-11574783-B2
Application number	US-201917295295-A
Country	US
Kind code	B2
Filing date	Nov 15, 2019
Priority date	Nov 29, 2018
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A splitter plate for an arc extinguishing chamber in a switching device, the splitter plate including a base portion; a pair of arms extending from the base portion; a recess for a movable contact defined between the arms; and a slot in each arm; wherein the recess is arranged between the slots. An arc extinguishing chamber for a switching device is also provided. A switching device for breaking an electric current, the switching device including a plurality of splitter plates or an arc extinguishing chamber is also provided.

First claim

The invention claimed is:

1. A splitter plate for an arc extinguishing chamber in a switching device, the splitter plate comprising:
a base portion;
a pair of arms extending from the base portion;
a recess for a movable contact defined between the arms; and
a slot in each arm, the slots being arranged on a respective outside of each arm;
wherein the recess is arranged between the slots; and
wherein each slot has a slot depth of 40% to 60% of an arm width of the arm adjacent to the slot.

2. The splitter plate according to claim 1 , wherein each slot is positioned at 5% to 30% of an arm length of the arm from the base portion.

3. The splitter plate according to claim 2 , wherein each slot is positioned at 10% to 20% of the arm length of the arm from the base portion.

4. The splitter plate according to claim 3 , wherein each slot is positioned at approximately 15% of the arm length of the arm from the base portion.

5. The splitter plate according to claim 1 , wherein each slot has a slot width of 0.5 to 3 times a thickness of the splitter plate adjacent to the slot.

6. The splitter plate according to claim 5 , wherein the slot width of each slot is 1 to 2 times the thickness of the splitter plate adjacent to the slot.

7. The splitter plate according to claim 1 , wherein the splitter plate comprises a central axis.

8. The splitter plate according to claim 7 , wherein the splitter plate is elongated along the central axis.

9. The splitter plate according to claim 8 , wherein the recess extends substantially parallel with the central axis.

10. The splitter plate according to claim 7 , wherein each slot extends at an angle of 30 degrees to 150 degrees relative to the central axis.

11. The splitter plate according to claim 10 , wherein each slot extends at an angle of 60 degrees to 120 degrees relative to the central axis.

12. The splitter plate according to claim 11 , wherein each slot extends substantially perpendicular to the central axis.

13. The splitter plate according to claim 1 , wherein the splitter plate has a substantially uniform thickness.

14. The splitter plate according to claim 1 , wherein the recess comprises a narrow portion and a wide portion.

15. The splitter plate according to claim 1 , wherein the slot depth of each slot is approximately 50% of the arm width of the arm adjacent to the slot.

16. An arc extinguishing chamber for a switching device, the arc extinguishing chamber comprising a plurality of splitter plates each including:
a base portion;
a pair of arms extending from the base portion;
a recess for a movable contact defined between the arms; and
a slot in each arm, the slots being arranged on a respective outside of each arm;
wherein the recess is arranged between the slots; and
wherein each slot has a slot depth of 40% to 60% of an arm width of the arm adjacent to the slot.

17. The arc extinguishing chamber according to claim 16 , wherein the splitter plates are disposed with a distance from each other and are arranged such that the recess of each splitter plate form a passage for the movable contact of the switching device.

18. A switching device for breaking an electric current, the switching device comprising a plurality of splitter plates each including:
a base portion;
a pair of arms extending from the base portion;
a recess for a movable contact defined between the arms; and
a slot in each arm, the slots being arranged on a respective outside of each arm;
wherein the recess is arranged between the slots; and
wherein each slot has a slot depth of 40% to 60% of an arm width of the arm adjacent to the slot.

19. The switching device according to claim 18 , further comprising the movable contact arranged to move in a passage formed by the recesses of the splitter plates.

20. The switching device according to claim 18 , wherein at least one of said plurality of splitter plates is provided as an arc extinguishing chamber.

Assignees

• Abb Schweiz Ag

Inventors

• Nilsson Alfred
• Angell Markus
• Karlén David
• Johansson Gunnar

Classifications

• H01H73/18

  Means for extinguishing or suppressing arc {(magnet coil acting as blow-out device H01H71/38)} · CPC title

• H01H9/36 Primary

  Metal parts · CPC title

• H01H1/20

  Bridging contacts {(for circuit breakers H01H73/045)} · CPC title

• H01H2009/365

  using U-shaped plates · CPC title

• H01H33/08 Primary

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