DE1640664A1 - End termination for high voltage cables and lines - Google Patents

Description

Cable and m e t a 1 1 w e r k e s 1 8l8 uutehoffnungshüt te Aktiengesellisciiai. t

liaiiiiover, Vahx-eiiwalder otraße 271 15 » March 1967

üjiden termination for high voltage cables and lines

High-polymer thermoplastic plastics have recently been found increasingly used as insulation for electrical cables and wires. Will these cables and wires required for hole voltage purposes, then it is necessary to that the respective cable or line ends are secured by a specially designed high-voltage-proof end seal *. To solve the resulting problem, namely the high-voltage-proof connection of cable or Line insulation and termination lobe, numerous proposals have already become known. So you already have them, for example when connecting the cable jacket made of a thermoplastic material with a terminal lobe made of cast resin Attempts to circumvent any difficulties that occur before the end of the cable is cast with the casting resin on the cable insulation an intermediate layer of isocyanate is applied at this point. For the production of an end termination However, this means considerable effort on the assembly site.

ü / ndverschlußwickel, which are factory-made to eliminate this deficiency were made from a thermoplastic material, however, have not yet led to a satisfactory one Solution, since a secure connection between the cable insulation and the wrapping is difficult or even impossible can not be achieved.

The invention is therefore aimed at overcoming the difficulties mentioned Qxnüri another way. According to the invention, as Coation & ikbody 9, usgebiidöi, ü final lobe of an ISrid final

00 9 8U / 06 4 5

This is for high-voltage cables sheathed with a thermoplastic, in particular with polyethylene, one in the axial direction running conical bore, by means of which the end lobe on the corresponding to the conical bore conically remote insulation of the cable or line end can be pushed on.

The rotary body produced in the factory and provided with the bore is so far onto the cable or line end deferred until a secure connection between the insulation of the cable or line and the postponed end lobe is made. Through the solid achieved in this way Liability of the two pass areas are Luiteinsculuss that to Glimmer phenomena could give cause, largely avoided. In addition, the end termination is easy to assemble guarantee t.

Dex rotary bodies pushed onto the cable or line end can be made of a cast resin, a thermoplastic synthetic material, a rubber or some other insulating material suitable for hole voltage purposes. However, it has proven to be particularly advantageous to produce the terminating lobe from an insulating material whose dielectric constant is the same or at least approximately the same as that of the cable or line insulation in order to achieve a uniform field strength curve. For this reason it is advantageous to choose end lobes made of this material, for example for cables and lines insulated with polyethylene or polyvinyl chloride «

After sliding the end lobe onto the cable or line end, the tight fit of the rotating body also during To ensure operation, a pressure device can also be provided, which is expediently designed to be resilient is.

The body of revolution itself can be designed as a solid body. But it is also uiüjg.ich, ichtern potential controlling deposits in the form of rings, Strahlungstx * and the like. Body embedded in the red, which is well known, from le j "e.adt? R

0098 4 4/0645

OBiGiNAL

Material or plastic or deformable, non-metallic Materials with electrically conductive layers exist.

The invention is based on the end termination shown in the figure a single-core high-voltage line explained in more detail,

The .Lleiter 1 of the aoclispaimuugsleitung is surrounded by the insulation made of polyethylene, which has been applied to the Leitex · in a non-illustrated oil press. The terminal lobe 3 made of polyethylene, which is designed as a massive Kotationskbodyei ", is pushed on from the end of the hole voltage conduction hex *, which is provided with the ¹ I for the Vex-Längex'uug the laleciiwe ^ ea au Uex ubexi'läche.

In order to ensure an ieste xiai direction of the end lobe 3 on the insulation ü to achieve and Gapuiidungen between these parts to vex'ineiden, the insulation 2 is at the point of the end termination conically offset and the end lobe 3 with the corresponding strand the conically formed bore 5, the pitch angle of which is equal to that of the conically offset JMides dex-isoliex'Uiig is. These conical paddles are felt that a safe installation of both parts according to the Aux'schJfbeu over the entire area is guaranteed.

possibly remaining small air pockets on the x-ul.il can still be reduced by far x by adding the i'iontage applied an insulating liquid to the mating surfaces will.

As an additional safeguard, the pressing device consisting essentially of the nut b and dex · compression spring 7 is provided, which reliably prevents the tight fit of the end lobe 3 from becoming loose. At the lower end of the terminating lobe 3, the halbleiten.de or weakly conductive coating υ, for example made of graphite, is attached, which is electrically conductively connected to the shielding 9 of the cable.

In the exemplary embodiment, the end closure is for an indoor installation shown. However, if such an end termination is to be used outdoors, then it will be well known i'orzei lan cover. intended as weather protection.

Q098AA / 06A5

Claims (8)

Cable and metal works 1818 Gutehoffnungshütte Aktiengesellschaft Hannover, Vahrenwalder Strasse 271 March 15, 1967 Patent to s ρ r ü 6 h e 1. End closing door with a thermoplastic material, in particular with polyethylene, sheathed high-voltage cable or lines, in the form of a terminating lobe surrounding the cable or line end, characterized in that that the terminating lobe (3) designed as a body of revolution has a conical bore extending in the axial direction (5) has, by means of which the end lobe on the conically offset insulation corresponding to the conical bore (2) of the cable or line can be pushed open. 2. End termination according to 1, characterized in that the termination « club made of an insulating material, preferably a thermoplastic Is made of plastic, the dielectric constant of which corresponds to that of the insulation of the cable or line, 3. End termination according to 1, characterized in that the pitch angle the conical bore (5) is the same as that of the conically offset insulation (2). 4. End termination according to 1, characterized by a terminating lobe after being pushed onto the cable or line end, preferably resilient pressure device that holds in position (6, 7) 5 · end termination according to 1, characterized in that the termination lobe (3) has potential-controlling deposits. 6. end termination according to 1, characterized in that the end lobe is designed as a cast solid body. 009844/0645 SAD 7 · End closure according to 1, characterized in that the closure lobe is provided with an electrically conductive coating at its end facing the cable or line, which is electrically connected to the shielding of the cable or line. 8. end termination according to claim 1, characterized in that the mating surfaces of the conical bore (9) and the conically offset insulation (2) to avoid air inclusions sen are wetted with an insulating liquid. State of the art taken into account DAS 1 037 ^ BATH ORIGINAL 009844/0645 Blank page