WO1995018473A1 - Rail coupling for connecting a ground cable to a safety strip - Google Patents
Rail coupling for connecting a ground cable to a safety strip Download PDFInfo
- Publication number
- WO1995018473A1 WO1995018473A1 PCT/FI1994/000580 FI9400580W WO9518473A1 WO 1995018473 A1 WO1995018473 A1 WO 1995018473A1 FI 9400580 W FI9400580 W FI 9400580W WO 9518473 A1 WO9518473 A1 WO 9518473A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rail
- coupling
- set forth
- teeth
- screw
- Prior art date
Links
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
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
- H01R4/2408—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws
-
- 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
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
Landscapes
- Cable Accessories (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
Description
Rail coupling for connecting a ground cable to a safety strip. The present invention relates to a rail coupling for connecting a ground cable to the supply-current conductor rail of a cabinet or a box or to the output terminal of a safety strip, said rail coupling comprising a body, a connecting bracket, extending therefrom and fastenable with a screw to said rail or terminal, a jaw element, movable by means of a clamping screw and defining a space in the body for receiving the end of a ground cable, as well as a shroud cover surrounding the coupling. This type of rail couplings are used for connecting insulated low-voltage ground cables to safety strips. At the moment, the only available rail coupling are those that require the stripping of an insulating cover off the end of a cable for creating a contact. Neither are the prior known couplings preferred in terms of manufacturing technique, including e. g. cast elements. Yet another drawback when using the prior art couplings is that, in order to thread the end of a cable into the coupling, the cable must either be bent or the coupling first removed from its fastening screw. An object of the invention is to provide a rail coupling of the above type, which substantially facilitates the installation work especially for the reason that the end of a cable need not be stripped off. At the same time, the other above-mentioned drawbacks can be eliminated. This object is achieved by the invention on the basis of the characterizing features set forth in the appended claims. Two exemplary embodiments of the invention will now be described with reference made to the accompanying drawings, in which fig. 1 shows a coupling of the invention in the axial direction of a cable and fig. 1A shows a moment screw in a plan view. Fig. 2 shows the same coupling in a side view; fig. 3 shows a twin coupling according to a second embodi ment of the invention in the axial direction of cables and fig. 4 shows the same coupling in a side view. In the embodiment shown in figs. 1 and 2, a coupling body 1 is made by cutting a piece of a desired length off a Cshaped aluminium profile. A connecting bracket or a connecting rail 3 is also cut off an aluminium profile having a cross-sectional shape which is shown in fig. 1. The connecting bracket is provided on one side with a serration 5 which excluded from the section extending from the body. The serrations or teeth 5 have a length which is sufficient for piercing the insulating cover of a ground cable and penetrating into the metal conductor for creating an electrical contact. The connecting bracket 3 is provided with a hole 4 for a fastening screw in view of securing the coupling to the supply-current conductor rail of a cabinet or a box or to the output terminal of a safety strip. The space defined by said body 1 further includes a jaw element 6 which is movable by a clamping screw 8 in the longitudinal direction of said screw 8, i. e. towards or away from the teeth 5. Preferably, the jaw element 6 is also provided with teeth 7 capable of piercing the insulating cover and penetrating into the conductor metal. The clamping screw 8 is designed as a moment screw by providing the screw 8 with a head 9 through the intermediary of a reducing section 10. The clamping screw 8 is tightened until the head 9 breaks off the screw 8. This makes sure that the teeth 5 and 7 have penetrated sufficiently into a cable to be connected. In order to disassemble the connection, if necessary, the end of said screw 8 is provided with a second head 11 which remains permanently in the head of the screw 8. The head 11 is preferably of such a design that it is partially more extensive than the head 9, whereby a socket wrench or spanner gripping the head 9 remains on top of the head 11 and is not able to grip said head 11 (see fig. 1A). Thus, if necessary, the screw 8 is disengageable with a standard tool capable of gripping the head 11. After the installation and in operating condition, the live coupling is surrounded by a shroud cover 12 made of a transparent plastic material. Thus, the connecting rail 3 and the jaw element 6 are made of an aluminium profile. In order to make the contact elements, i. e. the teeth 5 and 7, suitable for both copper and aluminium wires, said teeth 5 and 7 are coated with tin. The connecting rail 3 has a sufficient length between the hole 4 and the body 1 for moving said body 1 preferably over its entire length along the connecting rail 3. Thus, the body 1 can be turned completely out of the way while the end of cable is turned into position, whereafter the body 1 is pulled back along the rail 3 over the serrated section 5 and, thus, the end of a cable is retained in a space 2 defined by the jaw element 6 and the connecting rail 3. Hence, there is no need to bend the rigid cable for inserting the cable end into the coupling. The above description applies also to the embodiment shown in figs. 3 and 4. The only difference from the above is that the coupling is designed as a twin coupling by including an additional jaw element 13 between the serrated section 3,5 of the connecting rail 3 and the jaw element 6. The opposing surfaces of the additional jaw element 13 are also provided with teeth 14,15 piercing through the cable insulation and penetrating into the conductor metal. The additional jaw element 13 is capable of a free movement in the direction of the clamping screw 8. This embodiment proposes the use of two moment screws 8. It is obvious that both embodiments can be optionally provided with one or two moment screws. As shown in fig. 4, even in this case a distance between the end of the connecting rail 3 and the hole 4 is nearly twice the length of the body 1 in the direction of the rail 3. This also enables such a displacement of the body 1 that the end of a cable can be fitted therein by turning the cable without substantially bending the cable.
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SK837-96A SK83796A3 (en) | 1993-12-27 | 1994-12-23 | Rail coupling for connecting a ground cable to a safety strip |
EP95904548A EP0737372A1 (en) | 1993-12-27 | 1994-12-23 | Rail coupling for connecting a ground cable to a safety strip |
AU13714/95A AU1371495A (en) | 1993-12-27 | 1994-12-23 | Rail coupling for connecting a ground cable to a safety strip |
NO962697A NO962697L (en) | 1993-12-27 | 1996-06-26 | Rail connector to connect an earth cable to a safety strip |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI935858A FI96726C (en) | 1993-12-27 | 1993-12-27 | Rail connection for connecting a ground cable to a fuse strip |
FI935858 | 1993-12-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995018473A1 true WO1995018473A1 (en) | 1995-07-06 |
Family
ID=8539184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1994/000580 WO1995018473A1 (en) | 1993-12-27 | 1994-12-23 | Rail coupling for connecting a ground cable to a safety strip |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0737372A1 (en) |
AU (1) | AU1371495A (en) |
CZ (1) | CZ283592B6 (en) |
FI (1) | FI96726C (en) |
HU (1) | HUT76213A (en) |
NO (1) | NO962697L (en) |
SK (1) | SK83796A3 (en) |
WO (1) | WO1995018473A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2739727A1 (en) * | 1995-10-05 | 1997-04-11 | Cahors App Elec | Gripping/connection mechanism for auxiliary/main cable |
WO1999001910A1 (en) * | 1997-07-01 | 1999-01-14 | Georg Schlegel Gmbh & Co. | Device for connecting insulated electric conductors without stripping the insulation |
EP0896387A1 (en) * | 1997-08-07 | 1999-02-10 | Schneider Electric Sa | Screw clamp and terminal block for an electrical apparatus |
WO2003005492A2 (en) * | 2001-07-02 | 2003-01-16 | Siemens Aktiengesellschaft | Terminal |
CN112242615A (en) * | 2020-09-17 | 2021-01-19 | 国网福建省电力有限公司泉州供电公司 | Non-power-outage-installation electricity testing grounding ring suitable for active power distribution network and operation method thereof |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2953771A (en) * | 1958-04-17 | 1960-09-20 | Square D Co | Electrical connector |
FR2128011A2 (en) * | 1971-02-11 | 1972-10-20 | Mars Actel | |
FR2163908A5 (en) * | 1971-12-06 | 1973-07-27 | Sime | |
DE2226285A1 (en) * | 1972-05-30 | 1973-12-13 | Schiffmann Gmbh Alois | ELECTRICAL CLAMP FOR CONNECTING A CONDUCTOR TO A TRACK |
US3836941A (en) * | 1973-07-05 | 1974-09-17 | Thomas & Betts Corp | Electrical connector with resilient pressure pad |
DE2736786A1 (en) * | 1977-08-16 | 1979-03-01 | Felten & Guilleaume Carlswerk | Releasable cable cores connection to conductive rails - has open profile clamping stirrup surrounding rail, with compression screws in shoulder centre |
US4199216A (en) * | 1975-01-23 | 1980-04-22 | I-T-E Imperial Corp. | Torque controlling set screw for use with the cable of solderless connectors, or the like |
US4427258A (en) * | 1981-11-13 | 1984-01-24 | Amp Incorporated | Electrical connector |
-
1993
- 1993-12-27 FI FI935858A patent/FI96726C/en active IP Right Grant
-
1994
- 1994-12-23 HU HU9601777A patent/HUT76213A/en unknown
- 1994-12-23 EP EP95904548A patent/EP0737372A1/en not_active Ceased
- 1994-12-23 CZ CZ961870A patent/CZ283592B6/en not_active IP Right Cessation
- 1994-12-23 WO PCT/FI1994/000580 patent/WO1995018473A1/en not_active Application Discontinuation
- 1994-12-23 SK SK837-96A patent/SK83796A3/en unknown
- 1994-12-23 AU AU13714/95A patent/AU1371495A/en not_active Abandoned
-
1996
- 1996-06-26 NO NO962697A patent/NO962697L/en unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2953771A (en) * | 1958-04-17 | 1960-09-20 | Square D Co | Electrical connector |
FR2128011A2 (en) * | 1971-02-11 | 1972-10-20 | Mars Actel | |
FR2163908A5 (en) * | 1971-12-06 | 1973-07-27 | Sime | |
DE2226285A1 (en) * | 1972-05-30 | 1973-12-13 | Schiffmann Gmbh Alois | ELECTRICAL CLAMP FOR CONNECTING A CONDUCTOR TO A TRACK |
US3836941A (en) * | 1973-07-05 | 1974-09-17 | Thomas & Betts Corp | Electrical connector with resilient pressure pad |
US4199216A (en) * | 1975-01-23 | 1980-04-22 | I-T-E Imperial Corp. | Torque controlling set screw for use with the cable of solderless connectors, or the like |
DE2736786A1 (en) * | 1977-08-16 | 1979-03-01 | Felten & Guilleaume Carlswerk | Releasable cable cores connection to conductive rails - has open profile clamping stirrup surrounding rail, with compression screws in shoulder centre |
US4427258A (en) * | 1981-11-13 | 1984-01-24 | Amp Incorporated | Electrical connector |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2739727A1 (en) * | 1995-10-05 | 1997-04-11 | Cahors App Elec | Gripping/connection mechanism for auxiliary/main cable |
WO1999001910A1 (en) * | 1997-07-01 | 1999-01-14 | Georg Schlegel Gmbh & Co. | Device for connecting insulated electric conductors without stripping the insulation |
EP0896387A1 (en) * | 1997-08-07 | 1999-02-10 | Schneider Electric Sa | Screw clamp and terminal block for an electrical apparatus |
FR2767228A1 (en) * | 1997-08-07 | 1999-02-12 | Schneider Electric Sa | SCREW TERMINAL AND TERMINAL FOR ELECTRICAL APPARATUS |
WO2003005492A2 (en) * | 2001-07-02 | 2003-01-16 | Siemens Aktiengesellschaft | Terminal |
WO2003005492A3 (en) * | 2001-07-02 | 2003-05-30 | Siemens Ag | Terminal |
CN1330053C (en) * | 2001-07-02 | 2007-08-01 | 西门子公司 | Terminal |
CN112242615A (en) * | 2020-09-17 | 2021-01-19 | 国网福建省电力有限公司泉州供电公司 | Non-power-outage-installation electricity testing grounding ring suitable for active power distribution network and operation method thereof |
Also Published As
Publication number | Publication date |
---|---|
FI96726B (en) | 1996-04-30 |
CZ283592B6 (en) | 1998-05-13 |
EP0737372A1 (en) | 1996-10-16 |
NO962697D0 (en) | 1996-06-26 |
FI935858A (en) | 1995-06-28 |
CZ187096A3 (en) | 1996-11-13 |
HU9601777D0 (en) | 1996-09-30 |
SK83796A3 (en) | 1997-02-05 |
NO962697L (en) | 1996-06-26 |
FI935858A0 (en) | 1993-12-27 |
AU1371495A (en) | 1995-07-17 |
HUT76213A (en) | 1997-07-28 |
FI96726C (en) | 1996-08-12 |
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