EP0840421A1 - Cable joint box or cable shoe for medium-voltage cables - Google Patents
Cable joint box or cable shoe for medium-voltage cables Download PDFInfo
- Publication number
- EP0840421A1 EP0840421A1 EP97660085A EP97660085A EP0840421A1 EP 0840421 A1 EP0840421 A1 EP 0840421A1 EP 97660085 A EP97660085 A EP 97660085A EP 97660085 A EP97660085 A EP 97660085A EP 0840421 A1 EP0840421 A1 EP 0840421A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spline
- cable
- joint box
- space
- shoe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5016—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a cone
- H01R4/5025—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a cone combined with a threaded ferrule operating in a direction parallel to the conductor
Definitions
- the cable joints and cable shoes for medium-voltage cables are based on compressible boxes and shoes. Therefore, each lateral surface requires a separate box and, in addition, individual clamping jaws are required for individual boxes. During the course of clamping or compression, the box also develops burrs, which may cause partial discharges and destroy the joint unless such burrs are ground off. Thus, the burrs must be ground off. However, the grinding produces conductive metal particles, which are problematic if trapped between the insulation and contraction box of a cable where the particles may produce partial discharges.
- An object of the invention is to provide a cable joint box or a cable shoe for coupling a medium-voltage cable therewith without the above-mentioned drawbacks.
- the illustrated cable joint box comprises a tubular housing 1 provided with cavity spaces 10, which are separated by a central partition 11 and rotationally symmetrical and disposed concentrically relative to the box housing 1.
- Each space 10 receives a multi-segment spline 2, whose outer surface has an angle of convergence which is substantially equal to the angle of convergence found in the axial central area of the cavity space 10.
- the space 10 has its outer end provided with an internal thread 4 engaged by the thread of a clamping nut 3.
- a washer 5 Between the spline 2 and the nut 3 is a washer 5, which reduces friction between the spline and the nut as the spline 2 is forced deeper into the space 10 by turning the nut 3.
- the clamping nut 3 is provided with a central hole 9, disposed as an axial extension to a space 8 defined by the spline segments.
- the spline segments separated by gaps 7 only join each other at the narrower end of the spline 2, the spline segments being more readily able or having more space to approach each other at the wider end of the spline than at the narrower end thereof.
- an end piece 6 included in the spline is only provided with small webs, whereby the spline segments connect to each other and whose deformation or rupture enable movement of the spline segments towards each other also at the narrower end of said spline as the spline 2 is pushed deeper into the space 10.
- the angles of convergence and traveling distance of the spline 2 may vary to some extent.
- the cable shoe only differs from the above-discussed joint box in the sense that, instead of a spline joint included in one end, the housing 1 is provided with a screw-joint lug for connecting the cable shoe to a rail or to an immobile instrument terminal.
- a joint box or a cable shoe operating on spline principle in accordance with the invention offers e.g. the following benefits:
- the invention is not limited to the above-discussed embodiment, but its structural configuration may vary in several ways.
- the movement of a spline can be effected, not by a thrust screw but instead by a spline-pulling clamping means.
- the spline can be designed to be reducible at both ends thereof by alternately cutting open the gaps between the spline segments at both ends of the spline.
Landscapes
- Installation Of Indoor Wiring (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Cable Accessories (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Communication Cables (AREA)
Abstract
Description
- fig. 1
- shows a cable joint box of the invention in an axial section;
- fig. 2
- shows the same box in an end view and
- fig. 3
- shows the same box in a section taken along a line III-III in fig. 1.
- the same box or shoe is functional on a variety of cross-surfaces, the operating range depending on the angle of convergence and traveling distance of the spline
- no separate clamping tools are required
- no grinding of the box, thus no harmful metal particles
- provides a homogeneous electric field, thus no partial discharge problem
- no more faults resulting from incorrect or damaged clamping tool jaws or a wrong size of box
- stockpiles are reduced as the same box is functional over a plurality of cross-surfaces.
Claims (6)
- A cable joint box or cable shoe for medium-voltage cables, characterized in that a space (10) defined by a housing (1) contains in axial sequence a multi-segment spline (2) and a clamping element (3) therefor, and that the spline (2) is provided with a space (8) defined by the spline segments for receiving and securing the end of a cable.
- A cable joint box or cable shoe as set forth in claim 1, characterized in that the clamping element comprises a nut (3), provided with a central hole (9) as an axial extension to said space (8) defined by the spline segments.
- A cable joint box or cable shoe as set forth in claim 1 or 2, characterized in that the space (8) defined by the spline segments is located concentrically relative to the tubular housing (1).
- A cable joint box or cable shoe as set forth in any of claims 1-3, characterized in that the spline segments separated by gaps (7) connect to each other at one end of the spline (2) or alternately at both ends of the spline.
- A cable joint box or cable shoe as set forth in any of claims 1-4, characterized in that the space (10) defined by the housing is cuneately converging, the angle of convergence being substantially equal to that on the outer surface of the spline (2).
- A cable joint box or cable shoe as set forth in any of claims 1-5, characterized in that between the spline (2) and the clamping element (3) is a washer (5) for reducing friction between the spline and the clamping element.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI964368A FI101025B (en) | 1996-10-30 | 1996-10-30 | Cable splice sleeve or cable lug for medium voltage cables |
FI964368 | 1996-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0840421A1 true EP0840421A1 (en) | 1998-05-06 |
Family
ID=8546961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97660085A Withdrawn EP0840421A1 (en) | 1996-10-30 | 1997-07-25 | Cable joint box or cable shoe for medium-voltage cables |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0840421A1 (en) |
AU (1) | AU3419397A (en) |
CZ (1) | CZ285869B6 (en) |
EE (1) | EE9700179A (en) |
FI (1) | FI101025B (en) |
HR (1) | HRP970581A2 (en) |
HU (1) | HUP9701576A3 (en) |
NO (1) | NO974989L (en) |
PL (1) | PL321670A1 (en) |
SK (1) | SK140097A3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006082449A1 (en) | 2005-02-04 | 2006-08-10 | Tyco Electronics Uk Limited | Electrical connector |
CN113594760A (en) * | 2021-08-06 | 2021-11-02 | 杨玉亭 | Cable connector |
CN116598801A (en) * | 2023-06-07 | 2023-08-15 | 安徽中邦特种电缆科技有限公司 | Cable connection structure |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191514436A (en) * | 1915-10-12 | 1916-08-17 | Oreste Bajma-Riva | A Coupling for Mechanically and Electrically Connecting Wires, Metal Cords and the like. |
CH112294A (en) * | 1925-02-02 | 1925-10-16 | Zwicky Geb | Pole piece. |
CH165955A (en) * | 1933-04-13 | 1933-12-15 | Gardy Particip App | Connection for electrical conductors. |
CH178656A (en) * | 1934-05-21 | 1935-07-31 | Flury Arthur | Coupling device. |
US2475741A (en) * | 1943-01-06 | 1949-07-12 | Robert A Goeller | Connector |
US5362253A (en) * | 1994-01-03 | 1994-11-08 | Lin Kuang Ts An | Distribution cable mounting device |
US5440073A (en) * | 1994-05-02 | 1995-08-08 | Lin; Kuang-Ts'an Lin | Electric cable mounting device |
-
1996
- 1996-10-30 FI FI964368A patent/FI101025B/en active
-
1997
- 1997-07-25 EP EP97660085A patent/EP0840421A1/en not_active Withdrawn
- 1997-08-14 AU AU34193/97A patent/AU3419397A/en not_active Abandoned
- 1997-08-19 PL PL97321670A patent/PL321670A1/en unknown
- 1997-08-19 EE EE9700179A patent/EE9700179A/en unknown
- 1997-09-24 HU HU9701576A patent/HUP9701576A3/en unknown
- 1997-10-14 SK SK1400-97A patent/SK140097A3/en unknown
- 1997-10-23 CZ CZ973370A patent/CZ285869B6/en not_active IP Right Cessation
- 1997-10-29 NO NO974989A patent/NO974989L/en not_active Application Discontinuation
- 1997-10-30 HR HR970581A patent/HRP970581A2/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191514436A (en) * | 1915-10-12 | 1916-08-17 | Oreste Bajma-Riva | A Coupling for Mechanically and Electrically Connecting Wires, Metal Cords and the like. |
CH112294A (en) * | 1925-02-02 | 1925-10-16 | Zwicky Geb | Pole piece. |
CH165955A (en) * | 1933-04-13 | 1933-12-15 | Gardy Particip App | Connection for electrical conductors. |
CH178656A (en) * | 1934-05-21 | 1935-07-31 | Flury Arthur | Coupling device. |
US2475741A (en) * | 1943-01-06 | 1949-07-12 | Robert A Goeller | Connector |
US5362253A (en) * | 1994-01-03 | 1994-11-08 | Lin Kuang Ts An | Distribution cable mounting device |
US5440073A (en) * | 1994-05-02 | 1995-08-08 | Lin; Kuang-Ts'an Lin | Electric cable mounting device |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006082449A1 (en) | 2005-02-04 | 2006-08-10 | Tyco Electronics Uk Limited | Electrical connector |
CN113594760A (en) * | 2021-08-06 | 2021-11-02 | 杨玉亭 | Cable connector |
CN113594760B (en) * | 2021-08-06 | 2023-07-21 | 东莞市格瑞斯科技有限公司 | Cable connector |
CN116598801A (en) * | 2023-06-07 | 2023-08-15 | 安徽中邦特种电缆科技有限公司 | Cable connection structure |
CN116598801B (en) * | 2023-06-07 | 2024-05-14 | 安徽中邦特种电缆科技有限公司 | Cable connection structure |
Also Published As
Publication number | Publication date |
---|---|
CZ337097A3 (en) | 1998-05-13 |
HRP970581A2 (en) | 2000-08-31 |
CZ285869B6 (en) | 1999-11-17 |
SK140097A3 (en) | 1998-05-06 |
HU9701576D0 (en) | 1997-11-28 |
EE9700179A (en) | 1998-06-15 |
HUP9701576A3 (en) | 2000-03-28 |
HUP9701576A2 (en) | 1998-06-29 |
NO974989L (en) | 1998-05-04 |
AU3419397A (en) | 1998-05-07 |
NO974989D0 (en) | 1997-10-29 |
FI101025B (en) | 1998-03-31 |
FI964368A0 (en) | 1996-10-30 |
PL321670A1 (en) | 1998-05-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE DK ES FR GB IE IT PT SE |
|
AX | Request for extension of the european patent |
Free format text: LT PAYMENT 970728;LV PAYMENT 970728 |
|
AKX | Designation fees paid |
Free format text: AT BE DE DK ES FR GB IE IT PT SE |
|
AXX | Extension fees paid |
Free format text: LT PAYMENT 970728;LV PAYMENT 970728 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE DE DK ES FR GB IE IT PT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19981107 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H01R 4/50 20060101AFI20100222BHEP |