NL2022791B1 - Short-circuiting device - Google Patents
Short-circuiting device Download PDFInfo
- Publication number
- NL2022791B1 NL2022791B1 NL2022791A NL2022791A NL2022791B1 NL 2022791 B1 NL2022791 B1 NL 2022791B1 NL 2022791 A NL2022791 A NL 2022791A NL 2022791 A NL2022791 A NL 2022791A NL 2022791 B1 NL2022791 B1 NL 2022791B1
- Authority
- NL
- Netherlands
- Prior art keywords
- short
- electrically conductive
- veins
- ring
- conductors
- 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
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/031—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for multiphase cables, e.g. with contact members penetrating insulation of a plurality of conductors
Landscapes
- Locating Faults (AREA)
- Emergency Protection Circuit Devices (AREA)
- Insulating Bodies (AREA)
Abstract
Short-circuiting device for short-circuiting cores of a voltage cable relative to each other, with the feature that the short-circuiting device comprises an electrically conductive ring, wherein the short- circuiting device is provided with at least two releasable ring parts which can be arranged round cores of the voltage cable, wherein in mounted state the ring parts are configured to connect the cores in electrically conductive manner to the electrically conductive ring.
Description
SHORT-CIRCUITING DEVICE The invention relates to a short-circuiting device for (electrically) short-circuiting cores of a voltage cable relative to each other.
The invention is likewise related to a method for (electrically) short-circuiting cores of a voltage cable relative to each other. Such a device and method are generally known. It is known to use particularly four-core (low) voltage cables in a distribution network in order to distribute electricity from an electrical substation to one or more consumers. When making repairs to a voltage cable, the voltage cable is shut off and earthed on the side of a network operator in the electrical substation. Electricity can however still flow back into the network over the voltage cable on the side of the consumer, which can result in life-threatening situations when carrying out repair work on the voltage cable.
i5 International patent publication WO 2018/124883 A1 describes a method of securing a collection of potentially electrically conducting conductors of different polarities or phases arranged in one or more electrical cables. A safety device for use when practicing the method is described as well.
Patent publication NL 6 603 907 A describes a tapping connector for a multi-core cable comprising a radially divided ring of insulating material for receiving the insulated and continuous cable cores, wherein contact screws are radially arranged.
The invention has for its object to provide a short-circuiting device with which such repair work can be performed safely and efficiently.
A short-circuiting device of the type stated in the preamble according to the invention has for this purpose the special feature that the short-circuiting device comprises an electrically conductive ring, wherein the short-circuiting device is provided with at least two releasable ring parts which can be arranged round cores of the voltage cable, wherein in mounted state the ring parts are configured to connect the cores in electrically conductive manner to the electrically conductive ring. The cores are thus (electrically) short-circuited in safe manner so that particularly repair work on the voltage cable can take place safely. Forces which may be released in short-circuiting can be absorbed efficiently by the annular form. The ring parts are preferably congruent and each comprise a groove for accommodating therein a corresponding part of the electrically conductive ring. In other words, the ring parts form ring halves with a groove which is (at least partially) open toward the inside and wherein the electrically conductive ring is received. The ring is preferably manufactured from aluminium.
It is noted that in the frame work of the present invention the term “releasable ring parts” should be understood as ring parts that may be separated at least partly from each other so as to enable the cores to enter inside the ring formed by the ring parts. For example, the ring parts may be hingeable around a hinge axis located at the circumference of the ring, so that the ring parts are movable around said hinge axis between an open position, wherein the cores may enter inside the ring, and a closed position, wherein the ring parts close the ring. Further, as an example, the ring parts may be mutually detachably, so that the ring parts as separate constructional elements can be assembled together to form said ring.
In a preferred embodiment of the short-circuiting device according to the invention the short- circuiting device comprises electrical conductors which can be moved from a rest position, in which the conductors are inserted through the electrically conductive ring, to an operative position in which the electrical conductors press on the cores and connect the cores in electrically conductive manner to the electrically conductive ring. The short-circuiting device preferably comprises a separate (removable) support which in mounted state is enclosed by the ring parts, wherein in the operative position the electrical conductors press the cores against the support and connect the cores in electrically conductive manner to the electrically conductive ring. The support comprises particularly a cross-shaped cross-section, wherein in the operative position the conductors are configured to press each of the four cores into a corresponding corner of the support.
In a further preferred embodiment of the short-circuiting device according to the invention the conductors are provided with screw thread for turning the conductors from the rest position to the operative position. This is preferably done manually. The screw thread of the conductors then co- acts with screw thread in walls of holes in the electrically conductive ring, through which the conductors are inserted.
In a further preferred embodiment of the short-circuiting device according to the invention each of the conductors is provided on its outer end directed toward the support with a press-through contact which can be pressed through core insulation of the cores using a separate tool. The separate tool is particularly a hex key.
As already indicated, the invention also relates to a method for short-circuiting cores of a voltage cable relative to each other, wherein a cable sheath of the voltage cable is removed locally so that the cores are exposed locally, wherein at least two releasable ring parts of a short-circuiting device are arranged round the exposed cores, and wherein the cores are connected in electrically conductive manner to an electrically conductive ring of the short-circuiting device. Use is preferably made here of electrical conductors which are moved from a rest position, in which the conductors are inserted through the electrically conductive ring, to an operative position in which the electrical conductors press the cores against a support and connect the cores in electrically conductive manner to the electrically conductive ring. Use is particularly made here of press- through contacts in the electrical conductors for locally pressing through core insulation of the cores. The press-through contacts are operated from the outside, for instance by a hex key. The invention will be further elucidated herein below with reference to figures shown in a drawing, wherein: - figures la-q show in stepwise manner repair works on a voltage cable using the short- circuiting device according to the invention; and - figure 2 shows a front view, a perspective view and an exploded view of a preferred variant of the short-circuiting device according to the invention.
Referring to figure 1, a low voltage cable which extends between an electrical substation (of an operator of an electricity network) and a consumer is dug up and its cable sheath is removed locally, so that four cores 1 covered with core insulation in blue, red and yellow colours become exposed. After it has been checked that the voltage cable has been shut off and earthed on the side of a network operator in the electrical substation (figure 1a) a separate, cross-shaped support 2 is mounted, wherein each core | runs through a corresponding quadrant of support 2 (figure 1b). Ring halves 3, 4 of a short-circuiting device 5 are then mounted round cores 1, wherein the separate support 2 is enclosed by the ring halves 3, 4 (figures c and d). As already elucidated, in mounted state the ring halves 3, 4 form a circumferential, internal groove 6 in which an aluminium ring 7 is arranged (figure 2). By manually tightening knobs 8 (figures le and 2) four electrical conductors 9 are screwed from outside to inside in order to press cores | in the direction of corners of cross-shaped support 2. A hex key 10 is then placed in each of the knobs 8 in order to tighten contact points 11 in conductors 9 in the direction of the corners of support 2 and then press them through the core insulation of cores 1 (figures 1f and 2). A short-circuiting connection between the cores 1 and the aluminium ring 7 is hereby realized (figure 1g). Electricity which may be flowing from the consumer back into the network is therefore no longer able to cause any damage, so that repair works can be performed safely (figures 1h and 1). Outer ends of the voltage cable can then be reconnected to each other using a terminal block 12 (figures 1j, k and I), after which ring halves 3, 4 can be removed from short-circuiting device 5 and support 2 (figures Im, n and o). Contact imprints of only several millimetres will subsequently still be visible (figure 1p). Finally, a so-called wrap-around cable joint 13 is manufactured in situ using moulding resin, wherein the contact imprints are covered up (figure 1q).
IO As stated, figure 2 shows the ring halves 3, 4 of short-circuiting device 5 in mounted state in a front view (figure 2a), in a perspective rear view (figure 2b) and in an exploded view (figure 2c), wherein corresponding parts are designated with the same reference numerals.
The invention is not limited to the drawn exemplary embodiment, but also extends to other preferred variants falling within the scope of the appended claims.
Claims (13)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2022791A NL2022791B1 (en) | 2019-03-22 | 2019-03-22 | Short-circuiting device |
PL20164494.5T PL3713017T3 (en) | 2019-03-22 | 2020-03-20 | Short-circuiting device |
EP20164494.5A EP3713017B1 (en) | 2019-03-22 | 2020-03-20 | Short-circuiting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2022791A NL2022791B1 (en) | 2019-03-22 | 2019-03-22 | Short-circuiting device |
Publications (1)
Publication Number | Publication Date |
---|---|
NL2022791B1 true NL2022791B1 (en) | 2020-10-02 |
Family
ID=66641421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL2022791A NL2022791B1 (en) | 2019-03-22 | 2019-03-22 | Short-circuiting device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3713017B1 (en) |
NL (1) | NL2022791B1 (en) |
PL (1) | PL3713017T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3127853A1 (en) * | 2021-10-05 | 2023-04-07 | Upeca | System and method for shorting a cable |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6603907A (en) * | 1966-03-24 | 1967-09-25 | ||
WO2018124883A1 (en) * | 2016-12-27 | 2018-07-05 | Lyse Elnett As | Safety device for electric power cable end |
-
2019
- 2019-03-22 NL NL2022791A patent/NL2022791B1/en active
-
2020
- 2020-03-20 PL PL20164494.5T patent/PL3713017T3/en unknown
- 2020-03-20 EP EP20164494.5A patent/EP3713017B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6603907A (en) * | 1966-03-24 | 1967-09-25 | ||
WO2018124883A1 (en) * | 2016-12-27 | 2018-07-05 | Lyse Elnett As | Safety device for electric power cable end |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3127853A1 (en) * | 2021-10-05 | 2023-04-07 | Upeca | System and method for shorting a cable |
Also Published As
Publication number | Publication date |
---|---|
EP3713017C0 (en) | 2024-05-22 |
PL3713017T3 (en) | 2024-07-08 |
EP3713017B1 (en) | 2024-05-22 |
EP3713017A1 (en) | 2020-09-23 |
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