EP2311146A1 - Isolator zur abgedichteten abdeckung eines elektrischen kabelabschlussverbinders - Google Patents
Isolator zur abgedichteten abdeckung eines elektrischen kabelabschlussverbindersInfo
- Publication number
- EP2311146A1 EP2311146A1 EP09772134A EP09772134A EP2311146A1 EP 2311146 A1 EP2311146 A1 EP 2311146A1 EP 09772134 A EP09772134 A EP 09772134A EP 09772134 A EP09772134 A EP 09772134A EP 2311146 A1 EP2311146 A1 EP 2311146A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- insulator according
- insulator
- region
- insertion channel
- 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.)
- Granted
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 93
- 238000003780 insertion Methods 0.000 claims abstract description 71
- 230000037431 insertion Effects 0.000 claims abstract description 71
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims 2
- 239000000806 elastomer Substances 0.000 claims 2
- 229920001296 polysiloxane Polymers 0.000 claims 2
- 239000004945 silicone rubber Substances 0.000 claims 2
- 229920002725 thermoplastic elastomer Polymers 0.000 claims 2
- 229920002943 EPDM rubber Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 239000008267 milk Substances 0.000 description 4
- 210000004080 milk Anatomy 0.000 description 4
- 235000013336 milk Nutrition 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
-
- 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
- H01R4/70—Insulation of connections
Definitions
- the present invention relates to an insulator for sealed covering of an electrical cable termination connector, which produces an electrical connection between a cable termination of a cable and an appliance terminal
- appliance terminal components to be contacted for example to produce SF 6 load break switchgear, in this case have standardised appliance insulators, which are insulated in the form of an outer cone relative to the wall of the switchgear
- an outer cone appliance terminal component is disclosed for example in EN 50181
- Hermetically insulated, submersible covering is ensured above all by a specially configured insulator, often also designated as an adapter, which accommodates the appliance terminal on the one hand and the cable termination on the other
- a known insulator is described below, such as is known for example in the form of an insulated, screwable 630A RlCS 10 kV and 20 kV cable connection from the product range made by TYCO Electronics Raychem
- the known insulator 200 here comprises a first insertion channel 202 for accommodating the appliance terminal 208
- a second insertion channel 204 is provided for insertion of the cable 206
- the cable 206 has a cable termination 216 with a cable lug 210, which is connected to the appliance terminal in a connection region, in which the appliance terminal and the cable termination are brought together
- An open extension piece 212 is provided.
- the known insulator 200 comprises a plurality of serious disadvantages In order to ensure the necessary mechanical stability, the known insulator has comparatively thick walls, which leads to the use of large amounts of plastics material Furthermore, a metallic insert plate 220 contributes to the absorption of mechanical forces and inter alia prevents slide-off from the appliance terminal and positions the plug connector The insert plate 220 additionally fulfils functions relating to power transmission, but has the disadvantage that production of the insulator 200 is made substantially more expensive and additional electrical transition resistance arises
- the considerable wall thickness leads to the need to apply high assembly forces in order to push the cable termination 216 into the second insertion channel 204 Since the thick walls also stand in the way of extensive resilience in the case of highly resilient plastics materials, the known arrangement in Figs 21 to 23 is also not suitable for a very wide range of cable diameters, such that in each case a relatively large number of injection moulds has to be provided or alternatively appropriate adapters have to be used.
- the closing stopper 214 which is produced in the known arrangement from a thermoset and has to be secured by screwing in the open extension piece 212, increases the number of raw materials required, since it is not produced from the same material as the insulator 200, and increases assembly complexity.
- the object on which the present invention is based therefore consists in providing an improved insulator for sealed covering of an electrical cable termination connector, which fulfils all the requirements of an electrical connection between a cable termination of a medium and high voltage cable and an appliance terminal with regard to tightness and electric strength, but on the other hand is inexpensive to produce and relatively simple to assemble and allows the assembly of a wider range of cable cross-sections and cable lug geometries without the need for an adapter or similar aid to modify the geometry of the cable terminal connector.
- One essential aspect the present invention is that in the second insertion channel a contact region is provided, in which, in the assembled state, the electrically contactable cable termination is accommodated, and a sealing region, which rests sealingly against the termination of the cable, a centre axis of the sealing region being arranged offset relative to a centre axis of the contact region.
- the offset which may also be interpreted as eccentricity of the cylinders which in each case form the connection region and the sealing region, it is possible to find a type of compromise between the deflection caused to the second insertion channel by the smallest and largest cables (or cable lugs, or eccentricities) to be used.
- the sealing region is of smaller internal diameter than the contact region. In this way, it is on the one hand ensured that it rests sealingly against the termination while on the other hand sufficient space is made possible for optionally projecting cable lug arrangements. So as to prevent the insertion channel from becoming deformed when the cable is inserted into the narrower sealing region, at least one reinforcing rib is fitted on the outer wall of the sealing region along the insertion direction of the cable.
- a funnel-shaped flange may moreover ease insertion and be connected to the reinforcing ribs.
- this embodiment also has the advantage of increasing ease of grip for an assembler on insertion of the termination, so increasing the assembly friendliness of the entire arrangement.
- reinforcing ribs may be fitted to the internal wall in the connection region. These may extend both in the circumferential direction and also along the cable axis and be of lattice construction, for example Another essential feature of the reinforcing ribs is that the occurrence of undesirably high electrical field strengths is prevented
- a step is provided at the point of transition between the first insertion channel and the connection region, at which step the cable lug finds a counter- hold in the assembled state
- a step which may also be interpreted as a limit stop, prevents sliding out from the first insertion channel and from the outer cone of the appliance terminal
- This effect which is extremely undesirable, is also known as the "milk off effect Moreover, by avoiding a disc, the number of transition resistances may be reduced
- a resilient lid also designated hereinafter as a covering cap
- the tongue and groove may be provided for example by a recess in the lid and an associated projection on the internal wall of the open extension piece
- a resilient sealing lip which may take the form of a collar designed to be brought to rest with its end face against the open limit stop, the lid may be fitted in gap-
- Fig 2 shows a perspective, partially sectional representation of the insulator
- Fig 3 shows part of the section 3-3 from Fig 1 ,
- Fig 4 shows detail 4 from Fig 1 ,
- Fig 5 shows part of a view of the insulator of Fig 1 in the cable insertion direction
- Fig 6 shows section 6-6 of Fig 1 ,
- Fig 7 shows section 7-7 of Fig 1 .
- Fig 8 shows detail 8 from Fig 1 .
- Fig 9 is a perspective overview of the insulator according to the invention.
- Fig 10 is a rotated representation of the insulator according to Fig 9
- Fig 1 1 is a schematic representation of the second insertion channel to illustrate the eccentricity of the centre axes
- Fig. 12 is a schematic representation of the insulator according to the invention for use with cables of different sizes;
- Fig. 13 is a detail view of the arrangement of Fig. 12;
- Fig. 14 is a sectional representation of the first insertion channel to illustrate the forces arising when the cable lug is fitted;
- Fig. 15 is a perspective representation of the covering cap of the insulator
- Fig. 16 is a rotated perspective view of the covering cap of Fig. 15;
- Fig. 17 shows a section through the covering cap according to the invention.
- Fig. 18 shows a detail from the representation of Fig. 17;
- Fig. 19 shows a detail of the fitted covering cap;
- Fig. 20 is a plan view of the covering cap according to the invention.
- Fig. 21 is a first sectional representation of a known insulator
- Fig. 22 is a sectional representation of a known insulator rotated by 90°
- Fig. 23 is a schematic representation of a known electrical connection between the cable termination of a cable and an appliance terminal using the insulator of Figs. 21 and 22.
- Fig. 1 shows a sectional representation of the insulator 100 according to the invention in an advantageous embodiment.
- the insulator comprises a first insertion channel 102 for accommodating an appliance terminal.
- a second insertion channel 104 serves to accommodate the cable, not shown in this figure.
- the first insertion channel provides a seal substantially over the region 102 relative to the appliance terminal.
- connection region 108 in which the actual electrical contact comes into being.
- the connection region 108 is accessible from the outside via an open extension piece 1 10.
- a direct comparison with the previously known solution of Figs. 21 and 23 firstly shows in particular the significantly reduced wall thickness of the insulator 100. By reducing the wall thickness in this way and omitting the metallic insert plate, which will be discussed in detail below, marked savings may be made with regard to production of the insulator 100 compared with known insulators and electrical transition resistance may be reduced.
- the second insertion channel 104 is subdivided into a contact region 1 12, in which the cable lug is arranged, and a sealing region 1 14, which comes to rest directly and sealingly against the insulating cable termination.
- the centre axes 1 16 and 1 18 of the contact region 1 12 and of the sealing region 1 14 are offset relative to one another. The technical effects of this offset will be addressed in greater detail below with reference to Figs. 1 1 to 13.
- the different-sized internal diameters of contact region 1 12 and sealing region 1 14 make it possible, moreover, for cable lugs whose diameters are markedly greater than the cable diameter to be accommodated without difficulty in the second insertion channel 104, and the push-on force is reduced. In this way, in particular, damage to the insulator 100 caused by permanent loading and overstretching may be prevented.
- latticed reinforcing ribs 120, 121 are arranged in the contact region 1 12 on the inside, in order to lend sufficient mechanical stability to the second insertion channel 104 despite the reduced wall thickness.
- the cross- sectional shape of the reinforcing ribs 120 is here of essential significance for the electric strength, since the formation of excessive electrical fields and accumulated charges has always to be prevented. Bevelling and rounding of the ribs has proven advantageous.
- the sealing region 1 14 could also be provided at its inner wall with sealing lips, wherein the respective requirements relating to forces arising during assembly and operation have always to be complied with. Furthermore, when designing the sealing region 1 14 care must be taken to ensure that electrical requirements are met.
- a funnel-shaped insertion flange 122 is provided, which simplifies insertion of a cable termination.
- this insertion flange 122 is connected to the outer wall of the contact region 1 12 by way of a total of four reinforcing ribs 124.
- These outer reinforcing ribs 124 which extend substantially parallel to the insertion direction of the cable, prevent the sealing region 1 14 from being deformed or displaced inwards upon insertion of the cable in the direction of the arrow 126.
- the ribs 124 which are particularly clearly visible in Figs. 7 and 10, also result in increased ease of grip on fitting of the cable, since they provide, as it were, recessed grips for the user to grasp.
- a further advantageous feature of the insulator 100 according to the invention is the limit stop 128 provided in the connection region. As will be explained in greater detail in connection with Fig. 14, this limit stop serves to prevent the milk off effect, and in this way replaces the metallic insert plate, which is used with known insulators. In this way, the number of electrical transition resistances is also reduced.
- Detail 4 shows the catch projection 130, which is provided on the open extension piece 1 10 and, as will be explained below with reference to Figs. 15 to 20, interacts with an associated groove in the flexible covering cap to fasten the cap to the open extension piece.
- Figs. 12 and 13 show the outlines of a cable termination in one instance for a large cable 132 and in one instance for a small cable 134.
- FIG. 14 A further essential aspect of the insulator 100 according to the invention will be explained below with reference to Fig. 14.
- the detail shown in Fig. 14 is the insulator according to the invention fitted on the outer cone 208 of the appliance terminal. Since the insulator 100 according to the invention dispenses with the previously conventional metal insert plate in the region of the first insertion channel 102, the risk of "milk off arises as a result of the force conditions shown in Fig. 14. Because the insulator is widened in the direction indicated by the arrows 138 and the outer cone 208 of the appliance terminal constitutes an inclined region, a sliding movement arises in the direction 140.
- the limit stop 128 according to the invention provides a counter-hold 142 against the cable lug and prevents slide-off in the direction 140. In this way, the milk off effect can nonetheless be reliably prevented despite cheaper production of the insulator.
- the covering cap 144 will now be looked at in detail with reference to Figs. 15 to 20.
- An essential feature of the covering cap 144 is that it has a mushroom-shaped structure, such that it presses on the one hand from the inside against the inner wall of the open extension piece 1 10 and in so doing latches onto the catch projection 130 of the open extension piece 1 10 by means of the catch groove 146.
- the insertion bevel 148 allows simplified fitting of the covering cap 144.
- the snap connection between the catch projection 130 and the catch groove 146 allows secure, defined fitting.
- the ratios of the diameters of cap and insulator in the region 1 10 should be designed such that the interface is electrically sealed and watertight.
- an internally situated cap 144 allows material usage and structural space requirements to be reduced relative to an externally situated cap. In addition, the interface tends towards comprising a smaller area.
- the slope 156 in Fig. 18 allows tolerance compensation to allow the parts to rest resiliently one against the other.
- the covering cap also comprises a collar-like projection 150, which is pressed against an end face 152 of the open extension piece 1 10. When fitted, as illustrated in Fig. 19, gap- free installation is ensured.
- Fig. 20 shows a plan view of the covering cap 144.
- An actuating tab 154 which simplifies removal of the covering cap by an operator, is here in particular visible.
- the insulator illustrated in Figs. 1 to 10 includes inter alia the following essential improvements relative to the known arrangement of Figs. 21 to 23:
- Insertion of the cable may be simplified by the funnel-shaped flange at the end of the sealing region. Furthermore, the funnel-shaped flange is stabilised by four longitudinal ribs on the outside, which do not however clash with demoulding requirements during production, i.e. for example do not create a need for mould undercuts.
- the stopper for closing the open extension piece which consists in known solutions of a thermoset, generally an epoxy resin, has been replaced in the present invention by a covering cap 144 produced in the injection moulding process.
- This covering cap may be made from the same material as the rest of the insulator 100, for example of a flexible silicone elastomer.
- the covering cap is fixed to the insulator by means of a latching connection and, to simplify removal, is equipped with an actuating tab 154.
- the covering cap could moreover be fixed to the insulator by means of a band, moulded on in one piece for example, in order to prevent loss.
- the dimensions of the insulator according to the invention are markedly reduced in comparison with known solutions, since instead of the long stopper only a comparatively short covering cap 144 is used, no metal plate is any longer necessary and the connection region for the cable lug is shortened. By shortening the open extension piece 1 10 it is made possible, moreover, to work on the electrical connection with ordinary tools and for the internal diameter to be made smaller while retaining equally good accessibility.
- the costs of the insulator are reduced significantly, while production time is shortened.
- the forces arising both on insertion of the cable and when the first insertion channel is pushed onto the outer cone of the appliance terminal are lower.
- a relatively wide range of cable diameters can be covered with one and the same insulator.
- the sealing properties of the insulator according to the invention are better than those of known insulators.
- the fact that no metallic insert plate has to be fitted during injection moulding reduces costs and manufacturing complexity and avoids additional electrical contact surfaces.
- the insulator according to the invention adapts itself more readily to any bending of the cable which may occur.
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
- Cable Accessories (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810031252 DE102008031252A1 (de) | 2008-07-02 | 2008-07-02 | Isolierkörper zum abgedichteten Abdecken einer elektrischen Kabelendverschlussverbindung |
PCT/EP2009/004685 WO2010000434A1 (en) | 2008-07-02 | 2009-06-29 | Insulator for sealed covering of an electrical cable termination connector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2311146A1 true EP2311146A1 (de) | 2011-04-20 |
EP2311146B1 EP2311146B1 (de) | 2013-05-01 |
Family
ID=41055299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09772134.4A Active EP2311146B1 (de) | 2008-07-02 | 2009-06-29 | Isolator zur abgedichteten abdeckung eines elektrischen kabelabschlussverbinders |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2311146B1 (de) |
DE (1) | DE102008031252A1 (de) |
RU (1) | RU2525297C2 (de) |
WO (1) | WO2010000434A1 (de) |
ZA (1) | ZA201100020B (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130241330A1 (en) * | 2012-03-19 | 2013-09-19 | Hamilton Sundstrand Corporation | Aircraft dynamoelectric machine with feeder lug heatsink |
EP3503303B1 (de) | 2017-12-21 | 2021-03-17 | Tyco Electronics Raychem GmbH | Anschlussanordnung, die einen kabelschuh mit kragen umfasst |
AT523766B1 (de) * | 2020-05-14 | 2021-12-15 | Avl Ditest Gmbh | Berührschutz für ein Prüfkabel |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4288504A (en) * | 1980-07-21 | 1981-09-08 | Julian Victor J | Sealed battery cable termination |
GB8529454D0 (en) * | 1985-11-29 | 1986-01-08 | Raychem Gmbh | Cable connection |
FR2686196B1 (fr) * | 1992-01-15 | 1996-01-19 | Euromold | Protection de terminaison de cable moyenne tension. |
GB9206759D0 (en) * | 1992-03-27 | 1992-05-13 | Bicc Plc | Protective device for cable terminations |
DE4424072C1 (de) * | 1994-07-08 | 1996-01-25 | Rheydt Kabelwerk Ag | Steckendverschluß |
ES2116127T3 (es) * | 1996-07-29 | 1998-07-01 | Techmo S A | Conector de cables, en especial para empalmes de bornes o cables de puentes entre elementos de baterias. |
DE19746313A1 (de) * | 1997-10-21 | 1999-04-22 | Abb Patent Gmbh | Kabelendverschluß oder Kabelmuffe mit geometrischer Feldsteuerung |
DE19746312B4 (de) * | 1997-10-21 | 2009-02-12 | Südkabel GmbH | Kabelendverschluß oder Kabelmuffe |
DE19845776A1 (de) * | 1998-09-22 | 2000-03-23 | Siemens Ag | T-förmige Verbindungsanschlüsse für gasisolierte Mittelspannungsschaltanlagen |
RU2186965C1 (ru) * | 2000-12-29 | 2002-08-10 | Иркутский государственный технический университет | Кабельный соединитель для бронированных грузонесущих кабелей |
CN2624493Y (zh) * | 2003-04-17 | 2004-07-07 | 深圳市沃尔热缩材料有限公司 | 新型电缆插头和新型电缆附件 |
-
2008
- 2008-07-02 DE DE200810031252 patent/DE102008031252A1/de not_active Withdrawn
-
2009
- 2009-06-29 EP EP09772134.4A patent/EP2311146B1/de active Active
- 2009-06-29 WO PCT/EP2009/004685 patent/WO2010000434A1/en active Application Filing
- 2009-06-29 RU RU2011103694/07A patent/RU2525297C2/ru active
-
2011
- 2011-01-03 ZA ZA2011/00020A patent/ZA201100020B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2010000434A1 * |
Also Published As
Publication number | Publication date |
---|---|
ZA201100020B (en) | 2012-03-28 |
EP2311146B1 (de) | 2013-05-01 |
RU2011103694A (ru) | 2012-08-10 |
WO2010000434A1 (en) | 2010-01-07 |
RU2525297C2 (ru) | 2014-08-10 |
DE102008031252A1 (de) | 2010-01-14 |
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