High-speed closing device and switchgear including high-speed closing device

Patent metadata

Field	Value
Publication number	US-10593496-B2
Application number	US-201515317304-A
Country	US
Kind code	B2
Filing date	May 26, 2015
Priority date	Aug 28, 2014
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A high-speed closing device includes a first fixed contactor which is made from a conductive material; a second fixed contactor which is made from a conductive material, and faces the first fixed contactor so as to be arranged; and a movable contactor, of which a tip is made from a conductive material, which includes a hollow hole, in which an opposite side of the tip is opened, at an inner portion, and is separated from the first fixed contactor and the second fixed contactor with a distance being longer than an insulation distance so as to be arranged before the high-speed closing device is closed, and inserts the tip between the first fixed contactor and the second fixed contactor after the high-speed closing device is closed, and electrically connects the first fixed contactor and the second fixed contactor.

First claim

What is claimed is:

1. A high-speed closing device comprising:
a first fixed contactor which is made from a conductive material;
a second fixed contactor which is made from a conductive material, and is arranged to face the first fixed contactor;
a movable contactor, of which a tip is made from a conductive material, which includes a hollow hole, in which an opposite side of the tip is opened, at an inner portion, and is separated from the first fixed contactor and the second fixed contactor with a distance being longer than an insulation distance so as to be arranged before the high-speed closing device is closed, and the tip is inserted between the first fixed contactor and the second fixed contactor after the high-speed closing device is closed, and electrically connects the first fixed contactor and the second fixed contactor;
a vacuum case having a vacuum portion and an aerial room, the vacuum portion is maintained in a decompression state; and
a diaphragm, by which airtightness of the vacuum portion and the aerial room is maintained in a closing direction of the movable contactor,
wherein the first fixed contactor and the second fixed contactor and the movable contactor are arranged in the vacuum case, and
wherein the movable contactor is inserted between the first fixed contactor and the second fixed contactor by a buckling operation of the diaphragm, and electrically connects the first fixed contactor and the second fixed contactor.

2. A high-speed closing device as recited in claim 1 , wherein a gas generating portion is arranged at the hollow hole.

3. A high-speed closing device as recited in claim 2 , wherein the movable contactor is extruded and shifted by gas which is generated from the gas generating portion which is arranged at the hollow hole of the movable contactor, and the movable contactor is inserted between the first fixed contactor and the second fixed contactor, and electrically connects the first fixed contactor and the second fixed contactor.

4. A high-speed closing device as recited in claim 1 , wherein the diaphragm includes thin-walled portions, which are concentrically formed, of which number is greater than or equal to one.

5. A high-speed closing device as recited in claim 1 , wherein the diaphragm includes step shapes, which are concentrically formed, of which number is greater than or equal to one.

6. A high-speed closing device as recited in claim 1 , wherein the movable contactor is approached to the first fixed contactor and the second fixed contactor, and an electromagnetic force, which is caused when an electric current is flowed in accordance with a generation of a pre-arc, is operated in a direction where the movable contactor is inserted between the first fixed contactor and the second fixed contactor.

7. A high-speed closing device as recited in claim 1 , wherein the movable contactor is set at a middle electric potential in a state where the movable contactor is insulated from an earth electric potential.

8. A high-speed closing device as recited in claim 1 , wherein an angle of the diaphragm with respect to a dead point of a buckling of the diaphragm before the movable contactor is closed is smaller than an angle of the diaphragm after the movable contactor is closed.

9. A high-speed closing device as recited in claim 2 , wherein a slide guide portion, which guides a closing operation of the movable contactor, is made from an identical material of a flange portion which composes a part of the vacuum case.

10. A high-speed closing device as recited in claim 9 , wherein the slide guide portion, which guides a closing operation of the movable contactor, is made from an insulation material.

11. A high-speed closing device as recited in claim 9 , wherein a screw hole which is formed at an inner back portion of the hollow hole of the movable contactor, and an attachment hole of an initiation device of the gas generating portion, which is formed at the flange portion, are included, in a state where a diameter of the attachment hole is larger than a diameter of the screw hole.

12. A high-speed closing device comprising:
a movable contactor connection component which includes a first movable contactor and a second movable contactor, wherein the first movable contactor is made from a conductive material having a hollow cylindrical shape and has an opening portion at one end portion and a closing portion at the other end portion, and the second movable contactor is made from a conductive material having a hollow cylindrical shape and has an opening portion at one end portion and a closing portion at the other end portion, in a state where the opening portion of the second movable contactor is inserted to the opening portion of the first movable contactor in such a way that the opening portions have a nest configuration;
a first fixed contactor, which is made from a conductive material, and faces the closing portion of the first movable contactor with a constant distance when the device is not operated;
a second fixed contactor, which is made from a conductive material, and faces the closing portion of the second movable contactor with a constant distance when the device is not operated; and
a gas generating portion, which is arranged at a hollow portion which is formed at an inner portion of the movable contactor connection component.

13. A high-speed closing device as recited in claim 12 , wherein
the closing portion of the first movable contactor and the first fixed contactor, and the closing portion of the second movable contactor and the second fixed contactor are electrically connected when the contactors are operated, and an electric current is passed between the first fixed contactor and the second fixed contactor.

14. A high-speed closing device as recited in claim 12 , wherein an electric current passage, in which an electromagnetic force is acted, by passing an electric current between the first fixed contactor and the second fixed contactor, in a direction where the closing portion of the first movable contactor, which is electrically connected to the first fixed contactor, and the closing portion of the second movable contactor, which is electrically connected to the second fixed contactor, are maintained, is included.

15. A high-speed closing device as recited in claim 12 , wherein gas is generated from the gas generating portion which is arranged at the hollow portion of the movable contactor connection component, and a pressure in the hollow portion is raised, and the first movable contactor and the second movable contactor, which compose the movable contactor connection component, are respectively shifted in a reverse direction.

16. A high-speed closing device as recited in claim 12 , wherein the gas generating portion is a gas bomb which generates gas in accordance with control from the outside.

17. A high-speed closing device as recited in claim 12 , wherein the gas generating portion is a gunpowder which generates gas in accordance with control from the outside.

18. A high-speed closing device as recited in claim 12 , wherein the movable contactor connection component is arranged in a vacuum case, and the first fixed contactor and the second fixed contactor are respectively arranged at surfaces, which face each other, in each of surfaces which compose the vacuum case.

19. A high-speed closing device as recited in claim 18 , wherein the vacuum case includes a first vacuum case, which includes the first fixed contactor and the first movable contactor, and a second vacuum case, which inclu

Assignees

• Mitsubishi Electric Corp

Inventors

• Numata Shinichi

Classifications

• H02H9/041

  using a short-circuiting device · CPC title

• H01H39/004 Primary

  Closing switches · CPC title

• H01H39/00 Primary

  Switching devices actuated by an explosion produced within the device and initiated by an electric current · CPC title

• H02B1/16

  Earthing arrangements (earthing arrangements for substations H02B5/01; earthing arrangements for switchgear H02B11/28, H02B13/075) · CPC title

• H02H7/20

  for electronic equipment (for converters H02H7/10; for electric measuring instruments G01R1/36; for DC voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08) · CPC title