SOLID INSULATED BREAKER OF A SMALL SIZE

• US 3,855,435 A
• Filed: 10/30/1973
• Issued: 12/17/1974
• Est. Priority Date: 11/01/1972
• Status: Expired due to Term

• Current Assignee: Hitoshi Himi
• Original Assignee: Hitoshi Himi
• Inventors: Himi, Hitoshi
• Primary Examiner(s): Macon, Robert S.
• Application Number:
  US05/411,068
• Time in Patent Office: 413 Days
• Field of Search: 200/144B,148G,148R,15R
• US Class Current: 218/138
• CPC Class Codes: H01H 2033/566 Avoiding the use of SF6
• CPC Class Codes: H01H 2033/66246 Details relating to the guiding of the contact rod in vacuum switch belows
• CPC Class Codes: H01H 33/24 Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
• CPC Class Codes: H01H 33/55 Oil reservoirs or tanks; Lowering means therefor associated with withdrawal mechanism for isolation of switch H02B11/08
• CPC Class Codes: H01H 33/666 Operating arrangements
• CPC Class Codes: H02B 13/0354 comprising a vacuum switch H02B13/0352 takes precedence

Abstract

A solid state material insulated breaker of a small size comprising a molded main cylinder of electrically insulating material. The main cylinder is sealed at the upper and lower ends thereof and encloses a breaker unit having a fixed and a movable contacts therein. An insulating material is enclosed in said insulating cylinder. Two electrical conductors covered with a solid state insulating material are inserted respectively through two longitudinally spaced holes in the wall of said insulating cylinder, and connected electrically to said fixed and movable contacts.

Claims

1. A solid state material insulated breaker of a small size comprising a main cylinder of electrically insulating solid state material and sealed at the first and second ends thereof, said main cylinder having two openings longitudinally spaced from each other in the wall thereof, a breaker unit enclosed in said main cylinder and having a movable and a fixed contacts therein, means for fixing said breaker unit in said main cylinder, two insulated electric conductors inserted through said two openings of said main cylinder, one ends of which conductors are electrically connected respectively to said fixed and movable contacts of said breaker unit, each insulated conductor including an elongated, electric conductor and a solid insulating material layer formed around thereof in a fixed thickness, means for attaching said insulated conductors, respectively, to said main cylinder and a insulating material filled into the space between said sealed main cylinder and said breaker enclosed therein.

2. A solid state material insulated breaker of a small size as claimed in claim 1, wherein said soliD insulating material layer of each insulated conductor includes concentrically a cylindrical electrically conductive layer and two conductive rings electrically connected to both ends of said conductor.

3. A solid state material insulated breaker of a small size as claimed in claim 1, wherein said solid insulating material layer includes concentrically a cylindrical electrically conductive and two capacitor cones arranged near both ends of said solid state insulating material layer, the top point of each cone being disposed near the outer end of said insulating material layer, each said capacitor cone consisting of a plurality of cylindrical electric conductors each having almost same length and different radius.

4. A solid state material insulated breaker of a small size as claimed in claim 2, wherein said main cylinder includes concentrically a cylindrical, electrically conductive layer in the side wall thereof.

5. A solid state material insulated breaker of a small size as claimed in claim 3, wherein said main cylinder includes a cylindrical, electrically conductive layer in the side wall thereof.

6. A solid state material insulated breaker of a small size as claimed in claim 1, wherein at least one of said means for attaching said insulated conductors to said main cylinder including a cylindrical supporting member concentrically attached to the external circumference of said main cylinder and a fitting member fitted over a corresponding insulated conductor and attached to said supporting member, said fitting member consisting of a cylindrical portion concentrically applied on the external circumference of said corresponding insulated conductor and a flange portion attached to the external circumference of said supporting member.

7. A solid state material insulated breaker of a small size as claimed in claim 6, wherein said corresponding insulated conductor and the cylindrical portion of said fitting member attached concentrically on the external circumference of said corresponding insulated conductor are connected to each other by screws provided on their adjoining surfaces, respectively.

8. A solid state material insulated breaker of a small size as claimed in claim 7, wherein adhesive is filled up and solidified in the space between said corresponding insulated conductor and said fitting member applied on the outer circumference thereof.

9. A solid state material insulated breaker of a small size as claimed in claim 1, wherein the connection between said main cylinder and said supporting member fitted concentrically on the external circumference of said main cylinder is performed by screws formed on the adjoining surfaces of said supporting member and said main cylinder.

10. A solid state material insulated breaker of a small size as claimed in claim 9, wherein adhesive is filled up in the space between said main cylinder and said supporting member.

11. A solid state material insulated breaker of a small size as claimed in claim 1, further including a base plate and a cylindrical supporting member for mounting said main cylinder on said base plate, the last mentioned supporting member being screwed concentrically on the external circumference of the second end of said main cylinder.

12. A solid state material insulated breaker of a small size as claimed in claim 11, wherein said insulated conductor attaching means is formed integral with said supporting member for mounting said main cylinder on said base plate.

13. A solid state material insulated breaker of a small size comprising a main insulating cylinder having two openings axially spaced from each other therein and sealed at its upper and lower ends, a breaker unit enclosed in said main insulating cylinder and having movable and fixed contacts therein, means for supporting said breaker unit, two solid state material insulated electric conductors inserted into said two openings of said main insulating cylinder and electrically connected to the movable and fixed contacts of said breAker unit, respectively and means for attaching said insulated conductors to said main insulating cylinder, respectively, at least one of said last mentioned means for attaching including a cylindrical supporting member attached concentrically to the external circumference of said main insulating cylinder in a liquid-and gas-tight condition, said supporting member having a screwed hole in the side wall thereof, said screwed hole, when in place, being capable of aligning with the hole provided in the side wall of said main insulating cylinder, said insulated conductor being inserted through said two holes aligned with each other in a liquid-and gas-tight condition and electrically connected to said fixed and movable contacts of said breaker unit.

14. A solid state material insulated breaker of a small size as claimed in claim 13, wherein a cylindrical, electrically conductive layer is concentrically formed in the side wall of the main insulating cylinder.

15. A solid state material insulated breaker of a small size as claimed in claim 1, wherein a screw is formed on the internal surface of at least one of said openings provided in the side wall of said main insulating cylinder, and a screw complementary to said just mentioned screw is formed on the external circumference of the solid state material around each solid state material insulated conductor which is inserted into said screwed opening of said main insulating cylinder.

16. A solid state material insulated breaker of a small size, as claimed in claim 13, wherein an upper end of said main insulating cylinder is sealed by a cap, an upper supporting means for said breaker unit is provided over said breaker unit and provided with a flange portion contacted to the upper end surface of said main insulating cylinder, said flange portion being supported respectively by the upper end surface of said main insulating cylinder and the lower circumferential surface of said cap, a lower supporting means for said breaker unit including a small insulating cylinder provided below the breaker unit and further a base is provided for supporting said small insulating cylinder.

17. A solid state material insulated breaker of a small size as claimed in claim 16, further including an upper electrically conductive medium provided between said upper supporting means and said breaker unit for electrically connecting said fixed contact of said breaker with a corresponding insulated electrical conductor therefor, a lower electrically conductive medium provided between said lower supporting means and said breaker unit for electrically connecting said movable contact of said breaker unit with a corresponding insulated electrical conductor therefor, said lower medium having a vertical hole at the center thereof, a movable lead of electrically conductive material and connected with said movable contact of said breaker being supported so as to reciprocate in said vartical hole, and mean for driving said movable lead.

18. A solid state material insulated breaker of a small size as claimed in claim 17, said means for driving said movable lead includes a crank means swingable around a fixed pivot point.

19. A solid state material insulated breaker of a small size comprising a main insulating cylinder sealed at the upper and lower ends thereof, a breaker unit enclosed in said main insulating cylinder, two electrical conductors insulated around with a solid state insulating material, said conductors passing through the wall of said main insulating cylinder at two axially spaced points thereon and connected to the corresponding points of said breaker unit, and an insulating medium filling up the space between said main sealed insulating cylinder and said breaker unit therein, said insulating medium including liquid material.

20. A solid state material insulated breaker as claimed in claim 19, wherein said insulating medium includes a gas material.