DE2441091B2 - CABLE SET FOR PLASTIC INSULATED HIGH VOLTAGE CABLE CORES OR SINGLE-LEAD RADIAL FIELD CABLE - Google Patents

Description

w heladern their terms of Spannungsfe- ° ^ ^er · hwächsten and therefore critical area on stigkeit se _Kabe | have _isol i _augmentation and that the 0berg ^to 8 small - ^hen air gap thickness between the *, the core insulation leztlMi nd for the ^ cfPQtiekeit the clothing is decisive. Ψ """" Serweise has been found that by the ^transfer ü outer cable or Aderarbschirmung in the ^übeΓ, "." Critical transition region arranged mentioned ^ consist of from any insulating material ^druc hende'i elasticity and tensile strength of ^a Hie air gap formation suppresses , and thus the strength of the set is largely increased

^Wi i ^d "pr embodiment preferred of the invention • TZ outer shield forming, mono- or Jrhichtige conductive layer and, preferably, ^me u Z compression coil from selbstverschweißendem ^aU fe play, on the basis of polyethylene, propylene rubber or Organopolys lo-! Forms" where at least the insulating winding provided with the conductive layer is heat-treated (tempered)

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^r It has proven to be extremely advantageous if • ht only the insulating wrap but also the le.tfah.ge? ρ and each pressure coil is formed from self-amalgamating KuÄänder of the aforementioned type, STn excellently have the desired electrical and mechanical properties and finally forms a completely homogeneous body. The f ^ enisierende welding of bands applied to ^HOM "f Z takes place by itself Zeitlei room temperature, l-heat treatment Temper and substantially intensified by the, so that such with, ickel provided cable fitting in which 3; The insulating coil consists of a heat-treated insulating material, immediately ready for use with a voltage resistance that is about twice as high as the previously used sets of this type, and for use with plastic tube electrical as well as mechanically very favorable, essentially cylindrical three-dimensional shape of the set with a gradual transition on the cable or wire cross-section.

In particular for repair purposes, it is also possible within the scope of the invention to use the pressure roll to apply just as good effect over the shielding of a core-like insulating wrap, whereby one In particular, a correspondingly high-quality insulating material is preferably used for the insulating coil. at This likewise advantageous embodiment of the invention is the cable fitting as a drum that can be reeled Connection sleeve formed, wherein the Isolierwickei has the same vein cross-section, at both ends only up to the approach of the conical taper of the Isolation of each of the KaDei to be connected to one another or veins extends and in each of these transition areas from a pressure coil about twice the length of the conical taper and at most half the D.cku the core insulation is included. .

The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawing. The drawing shows a schematic representation and partially in section F i g. 1 a cable termination, F i g. 2 a cable connection sleeve and Fig. 3 an essentially vein-like connection n ^ff

_De rTnFig.l illustrated Endena.schluß a "polyet lenisolierten immersion conductor high voltage cable 13 has a direct effect on the freed from the cable shield 12 Aderisolierunt5 J ^ 4

end, also made of ribbons

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from the pressure coil tightly enclosed conductive layer for the field control of the High-voltage operation that can be used, designed in a manner known per se as an end closure set provided, whereby, for example, in the case of a '"- the arrangement of a special or the like inside

it is also advantageous

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The conductive layer 9 which forms sleeve shielding extends or is connected through. About the shielded Transition points 7 from the two sleeve winding ends to the cable insulation and the one directly connected to it subsequent sections of the same - as with the cable termination according to FIG. 1 - one each Pressure coil 11 made of tension-resistant elastomeric tape applied with bias, e.g. B. a special rubber - in particular self-amalgamating ethylene-propylene rubber band of sufficient tensile strength, arranged.

The sleeve according to the invention according to FIG. 3 differs from that according to FIG. 2 only in that the insulating coil 6 in the case of FIG. 2 sleeve shown has a much larger (about twice) diameter as the core insulation, the pressure coil 11 extending over its flank area 8 and a Piece of core insulation 4 extends. The greater thickness of the insulating coil and the overlap of the core insulation and the enlarged area of action of the radial forces of the pressure coil 11 ensure a very high operational reliability for the usual purposes.

With a suitable selection of the material of the strips of the insulating roll and the pressure roll, the im essential core-matched sleeve according to FIG. 3 can be used for high voltages, especially if at least The insulation wrap is preferably heat-treated with simultaneous application of pressure used to connect or repair reelable cable cores or cables.

For this purpose 2 sheets of drawings

Claims (5)

Claims: Thickness of the core insulation (4) is included. 1. Cable fitting, such as sleeve or end cap for plastic-insulated high-voltage cable cores or single-core radial field cables, in particular with an insulation made of non-crosslinked or crosslinked polyethylene, consisting of a cable or wire end of a cable to be terminated or the conductor connection including the conductor smoothing made of conductive plastic and, if necessary, conical, ₀ tapered end sections of the cable or core insulation of cables to be connected to one another, applied winding of self-amalgamating tape, e.g. B. made of butyl rubber, and at least one as an outer field delimitation or shield at least partially applied to the surface of this insulating wrap, extending over the transition to the core insulation to the outer cable or core shielding and electrically contacting it, surrounded by a roll of insulating tape Conductive tape, characterized by at least one compression coil (11) made of tension-resistant, rubber-elastic tape applied with bias, which tightly encloses the or each transition (7) from the insulating coil (6) to the cable or wire insulation (4) and on the one enclosed by it Transition area exerts a strong radial pressure. 2. Cable fitting according to claim 1, characterized in that the outer shield forming, single or multi-layer conductive layer (9) and preferably also the pressure roll (11) made of self-amalgamating tape, for example based on polyethylene, ethylene-propylene rubber or based on organopolysiloxane, and at least the one with the conductive layer (9) provided insulating coil (6) is heat-treated (tempered). 3. Cable fitting according to claim 1 or 2, characterized in that only the partially over the insulating coil (6) extending, the cable or wire shield (12) contacting and from Pressure roll (11) tightly enclosed conductive layer (9) for field control that can be used for high-voltage operation, in a manner known per se as End closure (10) trained set is provided (Fig. 1). 4. Cable fitting according to one of claims 1 to 3, characterized in that the or each Pressure coil (U) has the same cross-sectional diameter as the insulating coil (6), its Cross-sectional dimensions, as known per se, are significantly larger than those of the cable or Wire insulation (4) of the cable or wires (13) to be terminated or connected to one another, where it gradually tapers to the diameter of the core insulation (4) flank area (8) of the insulating coil (6) firmly encompassed. 5. Cable fitting according to claim 1 or 2, characterized in that it is used as a reel connection sleeve (16) is formed, the insulating coil (6) having the same cross-section, itself at both ends only up to the approach of the conical taper (5) of the insulation (4) of each of the cables or wires (13) to be connected to one another and 17 in each of these transition areas from a pressure coil (11) about twice the length of the conical taper (5) and at most half The invention relates to a cable fitting, such as a sleeve or end cap for plastic-coated High-voltage cable cores or single-conductor radial field cables, in particular with an insulation made of non-crosslinked or cross-linked polyethylene, consisting of one to be terminated on the cable or wire end Cable, or the conductor connection including the conductor smoothing made of conductive plastic and the possibly conically tapered end sections of the cable or wire insulation to be connected to each other cables applied winding of self-amalgamating tape, e.g. B. made of butyl rubber, and at least one as an external field limitation or shield at least partially on the surface of this insulating coil applied across the transition to the core insulation down to the outer cable or core shield extending and contacting this layer surrounded by a winding of insulating tape from electrically conductive tape. Such a set is for example from DT-OS 19 49 503 in the form of a self-amalgamating or -Adhesive tapes of wound end closure known, inside, to avoid Glow discharges, one with the shielding electrically conductively connected deflector end ring in one plastic insulating compound is embedded, including the conductive connection of the coiled Layers of self-amalgamating insulating tape is wrapped. However, these have no pressure-exerting function, and embedding a deflector closure ring requires undesirable use as well different types of insulating materials an additional installation effort and is moreover with regard to their Effectiveness largely depends on the skill of the fitter. On the other hand, the previously known cable connection sleeves could be made from self-amalgamating Ribbons or the like despite the arrangement of one with the shield to be connected to one another Cable electrically conductively connected outer field delimitation layer made of electrically conductive tapes can only be used in a limited voltage range due to the risk of breakdowns. It Therefore, sleeves made of polyethylene tape are mainly used for this purpose, which are welded at the installation site will. This in turn requires increased assembly effort and special care. The invention is based on the object of specifying a winding set which is easy to assemble and which - with full guarantee of the required dielectric strength - for use with high-voltage cables suitable. The solution to this problem arises with a cable fitting of the type outlined above, which is characterized according to the invention by at least one pressure coil made of tension-resistant, rubber-elastic tape applied with bias, which firmly encloses the or each transition from the insulating coil to the cable or wire insulation and on the one from it enclosed transition area a strong radiateil Ui UUiV auauui. The invention is based on the knowledge that wound fittings for plastic-insulated cables