Earthing switch

Patent metadata

Field	Value
Publication number	US-9799470-B2
Application number	US-201615216013-A
Country	US
Kind code	B2
Filing date	Jul 21, 2016
Priority date	Jan 23, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

An earthing switch is disclosed that includes a base for mounting the earthing switch, a first contact element that is mounted on the base via a first insulating element, a shaft mounted in the base, a second contact element, mounted on the shaft, that can swivel relative to the first contact element, so that the second contact element can move between a closed and an open position, a locking and/or monitoring apparatus for locking the shaft and/or for monitoring the position of the shaft, wherein the locking and/or monitoring apparatus is fitted to the base next to the first contact element, wherein a second insulating element held between the base and the first insulating element has an insulating plate that protrudes from the base and that is arranged between the first contact element and the locking and/or monitoring apparatus.

First claim

The invention claimed is:

1. An earthing switch, comprising:
a base for mounting the earthing switch;
a first contact element, which is mounted on the base by way of a first insulating element;
a shaft mounted in the base;
a second contact element, which is mounted on the shaft and can swivel in relation to the first contact element by virtue of being mounted to the shaft, so that the second contact element can move between a closed position and an open position; and
at least one of a locking and monitoring device wherein the locking device is used for locking the shaft and the monitoring device is used for monitoring the position of the shaft, the at least one of the locking and monitoring device being attached to the base next to the first contact element;
wherein a second insulating element is held between the base and the first insulating element and has an insulating plate that protrudes from the base and is arranged between the first contact element and the at least one of the locking and monitoring device.

2. The earthing switch according to claim 1 , wherein the second insulating element has an elongate portion, which is held between the first insulating element and the base and has first openings for mounting the second insulating element on the base and second openings for mounting the first insulating element on the second insulating element.

3. The earthing switch according to claim 2 , wherein the openings are separated from one another by webs the elongate portion.

4. The earthing switch according to claim 1 ,
wherein a portion of the second insulating element that protrudes from the elongate portion is configured in the form of a spade, so that the insulating plate is delimited in a U-shaped manner by side walls.

5. The earthing switch according to claim 1 ,
wherein the first contact element comprises a contact shoe and the second contact element comprises a contact blade, which are inserted one into the other during the closing of the earthing switch.

6. The earthing switch according to claim 1 ,
wherein the earthing switch comprises three first contact elements, which are arranged in a row on the base, and three second contact elements, which are arranged in a row on the shaft; and
wherein one of the three second contact elements is provided by an L-shaped component mounted on the shaft and the remaining two second contact elements are provided by a U-shaped component mounted on the shaft.

7. The earthing switch according to claim 1 ,
wherein the at least one of the locking and monitoring device comprises an actuator with a locking pin, mounted on the base, and a locking disk, mounted on the shaft, the locking disk having for fixing the shaft at least one clearance in which the locking can engage; and
wherein the at least one of the locking and monitoring device comprises a plurality of switches, which are mounted on the base and mesh on a camshaft mounted on the shaft, in order to determine a position of the shaft.

8. The earthing switch according to claim 7 ,
wherein the actuator comprises a spring, which presses the locking pin in the direction of the locking disk, and the actuator comprises an energizable coil, which when energized pulls the locking pin away from the locking; and
wherein the locking disk has a clearance for fixing the shaft to provide at least one of an open position and a clearance for fixing the shaft in a closed position.

9. The earthing switch according to claim 7 ,
wherein the switches and the camshaft are configured in such a way that an open position, an intermediate position and a closed position can be detected.

10. The earthing switch according to claim 1 ,
wherein the shaft is mounted in the base by sliding bearings;
wherein at least one of a locking disk and camshaft of the at least one of the locking and monitoring device device is/are mounted on the shaft in such a way that, with respect to the sliding bearings, to be arranged outside a portion of the shaft that carries the second contact element.

11. The earthing switch according to claim 1 ,
wherein the earthing switch comprises three first contact elements, which are arranged in a row on the base, and three second contact elements, which are arranged in a row on the shaft.

12. The earthing switch according to claim 1 ,
wherein one of the three second contact elements is provided by an L-shaped component mounted on the shaft and the remaining two second contact elements are provided by a U-shaped component mounted on the shaft.

13. The earthing switch according to claim 1 ,
wherein the at least one of the locking and monitoring device comprises an actuator with a locking pin, mounted on the base, and a locking disk, mounted on the shaft, the locking disk having for fixing the shaft at least one clearance in which the locking can engage.

14. The earthing switch according to claim 1 ,
wherein the at least one of the locking and monitoring device comprises a plurality of switches, which are mounted on the base and mesh on a camshaft mounted on the shaft, in order to determine a position of the shaft.

15. The earthing switch according to claim 7 ,
wherein the actuator comprises a spring, which presses the locking pin in the direction of the locking disk, and the actuator comprises an energizable coil, which when energized pulls the locking pin away from the locking.

16. The earthing switch according to claim 7 ,
wherein the locking disk has a clearance for fixing the shaft to provide at least one of an open position and a clearance for fixing the shaft in a closed position.

17. The earthing switch according to claim 13 ,
wherein the switches and the camshaft are configured in such a way that an open position, an intermediate position and a closed position can be detected.

18. The earthing switch according to claim 14 ,
wherein the switches and the camshaft are configured in such a way that an open position, an intermediate position and a closed position can be detected.

19. The earthing switch according to claim 15 ,
wherein the switches and the camshaft are configured in such a way that an open position, an intermediate position and a closed position can be detected.

20. The earthing switch according to claim 16 ,
wherein the switches and the camshaft are configured in such a way that an open position, an intermediate position and a closed position can be detected.

Assignees

• Abb Technology Oy

Inventors

• Kipfer Manfred

Classifications

• H01H1/42

  Knife-and-clip contacts · CPC title

• H01H31/28

  with angularly-movable contact · CPC title

• H01H9/16

  Indicators for switching condition, e.g. "on" or "off" · CPC title

• H01H31/003 Primary

  Earthing switches (H01H31/02 - H01H31/26 take precedence; contact made by liquid jet H01H29/32; for substations H02B1/16, H02B5/01; for withdrawable switchgear H02B11/28; for gas-insulated switchgear H02B13/075) · CPC title

• H01H31/08

  for interlocking two or more parts of the mechanism for operating contacts · CPC title