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1. WO2020109034 - SPLITTER PLATE, ARC EXTINGUISHING CHAMBER AND SWITCHING DEVICE

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[ EN ]

CLAIMS

1. A splitter plate (14) for an arc extinguishing chamber (12) in a switching device (10), the splitter plate (14) comprising:

- a base portion (40);

- a pair of arms (30) extending from the base portion (40);

- a recess (34) for a movable contact (18) defined between the arms (30); and

- a slot (32) in each arm (30);

wherein the recess (34) is arranged between the slots (32) and wherein each slot (32) has a slot depth (52) of 40 % to 60 %, such as approximately 50 % of an arm width (54) of the associated arm (30) adjacent to the slot (32).

2. The splitter plate (14) according to claim 1, wherein the slots (32) are arranged on a respective outside (48) of each arm (30).

3. The splitter plate (14) according to claim 1 or 2, wherein each slot (32) is positioned at 5 % to 30 %, such as 10 % to 20 %, such as approximately 15 %, of an arm length (46) of the associated arm (30) from the base portion (40).

4. The splitter plate (14) according to any of the preceding claims, wherein each slot (32) has a slot width (58) of 0.5 to 3 times, such as 1 to 2 times, a thickness (56) of the splitter plate (14) adjacent to the slot (32).

5. The splitter plate (14) according to any of the preceding claims, wherein the splitter plate (14) comprises a central axis (38).

6. The splitter plate (14) according to claim 5, wherein the splitter plate (14) is elongated along the central axis (38).

7. The splitter plate (14) according to claim 5 or 6, wherein each slot (32) extends at an angle of 30 degrees to 150 degrees, such as 60 degrees to 120 degrees, such as substantially perpendicular, to the central axis (38).

8. The splitter plate (14) according to claim 6 or 7, wherein the recess (34) extends substantially parallel with the central axis (38).

9. The splitter plate (14) according to any of the preceding claims, wherein the splitter plate (14) has a substantially uniform thickness (56).

10. The splitter plate (14) according to any of the preceding claims, wherein the recess (34) comprises a narrow portion (44) and a wide portion (42).

11. An arc extinguishing chamber (12) for a switching device (10), the arc extinguishing chamber (12) comprising a plurality of splitter plates (14) according to any of claim 1 to 11.

12. The arc extinguishing chamber (12) according to claim 11, wherein the splitter plates (14) are disposed with a distance to each other and are arranged such that the recess (34) of each splitter plate (14) form a passage (36) for a movable contact (18) of the switching device (10).

13. A switching device (10) for breaking an electric current, the switching device (10) comprising a plurality of splitter plates (14) according to any of claims 1 to 10 or an arc extinguishing chamber (12) according to claim 11 or 12.

14. The switching device (10) according to claim 13, further comprising a movable contact (18) arranged to move in a passage (36) formed by the recesses (34) of the splitter plates (14).