ES2548631B2 - N-polar cable consisting of n bare unipolar conductors and their accessories - Google Patents

Abstract

N-polar cable consisting of n bare unipolar conductors (1) and their accessories: suspension clip (2), tie-down clip (3) and outdoor terminal (4), of the type that incorporate a plurality of conductors used for build power lines, which basically consist of: - n-conductors (11A, 11B, 11C) bare; - an insulator (13) of cylindrical geometry provided with n-housings (12A, 12B, 12C), whose function is to maintain the electrical insulation between the different conductors (11A, 11B, 11C) since these are bare and have a outer cover (16) for external protection; - a resistant insulating (10) or conductive (10 ’) core whose function is to withstand the mechanical tension required to support the cable (1); - a plurality of straight insulating fins (14) and curved insulating fins (15), its function being to increase the leakage line and the protection of the birdlife.

Description

N-polar cable connected by n bare unipolar conductors and their accessories.

5 Object and sector of the technique to which the invention relates

The present invention relates to an electric cable (1) And to accessories: a clip

of suspension (2), a clamp of mooring (3) and an external tenoinal (4).

The object of the invention is a cable and its accessories for high voltage power lines of the insulated single-stranded stranded cables, but shaped by bare unipolar conductors. The invention applies nonnally, but not exclusively, to the fields of cables for medium voltage overhead lines, of

alternating current (MVAC) and direct current (MVDC). These cables are typically of nominal voltage greater than 1 kV and equal to or less than 30 kV; although it can also be useful in the fields of low voltage and high voltage cables.

The invention is located in the technical sector of electromechanical engineering, and more specifically in that of high voltage power line infrastructure.

General and closest prior state of the art

Different types of cables used in the art are known in the state of the art

medium voltage overhead lines, these being: 25

- bare conductors; -coated conductors; -isolated braided single-pole cables.

3 O Bare conductors are composed of an inner body, or core, based on steel wires, galvanized (STl) or coated with aluminum (AC), and a body

concentric, or conductor, trimmed by aluminum wires (ALI). The composition and

Characteristics of them are listed in nonoa UNE EN 50182.

35 The coated conductors are identical to those of the previous group but have a

plastic cover that does not provide insulation but some protection, eg for

birdlife, woodland, etc. The composition and characteristics of them are listed in nonoa UNE EN 50397-1.

4 O Insulated stranded twisted bundle cables are connected by a theme of insulated stranded stranded wires around a galvanized steel cord with cover

plastic. The composition and characteristics thereof are in nonoa EC 60502-2 and RU 3309.

45 The inductive reactance of a conductor is given by the following equation:

XL = wL (Mm)

where ro = 2 · rr'f; where f is the frequency (Hz) and L the given self-induction coefficient

by L = (0,05 +0,2 · In ("~~ G)) .10-3 (HIkm); where 0, is the diameter (mm) of the

conductor (not to be confused with the diameter of the cable) and DMG is the Average Geometric Distance between conductors (mm) expressed by DMG = ~ a12. a13. a23 (mm), 5 being 8x and the distance (mm) between centers of the cables x and y.

Bare conductors and coated conductors require a high minimum separation of conductors; specifically in Spain this distance is 1.5 m as established in the measures published in RDI43212008. This distance generates

10 a high inductive reactance, since as indicated, L depends on DMG; The use of more bulky crossheads and anniversaries is also required, increasing the cost of the supports and generating greater servitude to the owners of the farms where the aerial laying takes place.

15 The insulated unipolar cables twisted in a beam are in contact with each other, with JX} f being both its minimum DMG (not nu1a since axy is the distance between centers of the cables x and y).

In the insulated conductors XL it is of the order of 0.1 (nIkm) And in a standard 2 O airway XL is of the order of 0.4 (O / km), that is, 4 times higher, causing a voltage drop 4 times higher

Naked cables have an advantage over the insulated braided beams, a greater power of dissipation of the internal heat (generated by the losses of Joule), 25 reaching therefore lower operating temperature for the same intensity of electric current

In the closest state of the art we have the following documents, among others:

3 O In the patent document called DOl with publication number ES 2344769 T3 And publication date 06.09.2010 and literally entitled: "High voltage electrical cable", an electrical cable is described comprising a layer of electrical insulator based on polyethylene and a styrene copolymer.

35 In the patent document called D02 with publication number ES 2445320 T3 and publication date 03.03.2014 and literally entitled: "Tenninru connection device for an electric cable", a tenninaJ connection device for an electric cable is described, in particular a medium or rough voltage electrical cable, and a method for connecting one end of a medium or high voltage electrical cable with a pWltO of

4 Or connection.

In the following web link: http://www.prysmianc1ub.es/fiIes/92a2b5cb9c/plO/mtbaja_2014%20unapag.pdf A complete catalog of cables and accessories for medium voltage appears.

Technical problem raised

The prior art systems present a problem that focuses primarily on the following aspects:

X bare and coated conductors require a high distance between conductors and therefore have 003 high inductive reactance, causing o or high voltage drop;

10 X bare and coated conductors require expensive additional beaconing devices for birdlife protection;

X bare conductors cause a high electrocution of the birdlife, the corrective measure being the increase in the distance between conductors,

15 requiring the use of bulky crossheads and anniversaries, which increases the cost of the supports and generates greater servitude to the owners of the farms where the aerial laying takes place;

X insulated unipolar conductors braided in a beam have a reduced transport capacity of 2 O due to their low capacity to evacuate internal heat.

X insulated unipolar conductors twisted into a beam make it impossible to visualize the phases (eg, phases A, B, e, if it is tri-polar) because they are twisted in longitudinal advance.

25 Technical advantage provided by the invention

~ The cable (l) that the invention recommends solves in a completely satisfactory way the aforementioned problem, in each and every one of the 3 or different aspects mentioned.

Therefore, it has been a long-sought need to have a cable for overhead lines that combines the advantages of bare conductors and insulated conductors, as well as having accessories for assembly and connection.

35 Brief description of the figures

To complement the description and in order to help a better understanding of the features of the invention. It is accompanied as an integral part of said 4 O description, a set of figures with an illustrative and non-limiting nature.

Glossary of references

(ID Electric cable any of the prior art; 45 (!) Electric cable object of the invention;

(10) Insulating resistant core; (10 ')

(101)

(102) (llA) (1 lB) (IIC) (l2A) (l2B) (12C)

(13)

(14)

(fifteen)

(16)

to the

(20A) (2IA) (22A) (23A) (24A) (25A) 26 27 28 29 Q)

(30)

W

(40) (4IA) (4IB) (41C)

Conductive tough soul; Heavy duty conductor;

Soul insulator;

Driver "Ati; Conductor "B"; Driver "C"; Accommodation "A" (coated semiconductor screen); Accommodation "B" (bis); Accommodation "e" (tris); Isolation; Straight insulating fin; Curved insulating fin; External cover; Suspension clip; Semiconductor element "A"; Insulating element "A"; Resistant element "A"; Spring washer "To you; Nut ";

Screw you A ";

Upper body tubular housing;

Lower body tubular housing; Dovetail coupling; Upper ear;

Mooring clips;

Lower ear; Tennina! from outside; Body; Tenninal nA "; Tenninal "B"; Tenninal tiC ";

G / ossuary of symbols

APl Support with line start function;

AP2 Support with alignment function (with vertical shots);

AP3 Support with alignment function;

AP4 Support with angle function; AP5 Support with soft angle function;

AP6 Support with end of line, splice or branch function;

0re External nominal diameter of the cable;

0ri Nominal inner diameter of the cable;

0c Conductor diameter; 0a Soul diameter;

e Minimum insulation thickness;

angl2 Opening angle of the accommodation;

D, N Number of unipolar cables;

Figure 1 (Fig.I) .- shows a schematic view of a profile and plan of any aerial laying in which an electric cable object of the invention (1) is used.

Figure 2 (Fig. 2) .- shows a gentleman perspective view of an electric cable 5 object of the invention (1) at the time of coupling bare n-conductors (1IA, IIB, 11 C); (in figure n ~ 3).

Figure 3 (Fig. 3) .- shows a cross-sectional view of an electric cable object of the invention (1). Fig. 3A: without coupling the bare n-conductors (1IA, IIB, llC). 10 Fig. 3B: naked n-conductors coupled (1IA, 118, llC); (in figure n ~ 3).

Figure 4 (Fig.4) .- shows a cross-sectional view of an electric cable object of the invention (1), without shading its elements, and in which references of the most significant geometry have been indicated; (in the figure n = 3).

15 Figure 5 (Fig. 5) .- shows an elevation view, in Fig. 5A of a suspension clip

(2) and in Fig. 5B of a clamp (3), both for an electric cable object of the invention (1).

20 Figure 6 (Fig.6) .- shows a view in longitudinal section, in Fig.6A of a suspension clip (2) and in FIg.6B of a tie clip (3), both for an electric cable object of the invention (1).

Figure 7 (Fig. 7) .- shows a cross-sectional view of a suspension clip (2) 25 mounted on an electric cable object of the invention (1).

Figure 8 (Fig. 8) .- shows a cross-sectional view of a clamp (3) mounted on an electric cable object of the invention (1).

3 O Figure 9 (Fig. 9) .- shows, in Fig. 9A a plan view and Fig. 9B a profile view of an outdoor terminal (4).

Figure 10 (Fig. 10) .- shows, in Fig.IOA an elevation view and Flg.IOB a plan view. of a support with alignment function (AP.3) in which an electric cable 35 object of the invention (1) is arranged.

Figure 11 (Fig.11) .- shows, in Fig.11A an elevation view and Fig.llB a plan view, of a support with soft angle function (AP.5) in which an electric cable has been arranged object of the invention (1).

40 Figure 12 (Fig. 12) .- shows, in Fig. 12A an elevation view and Fig. 12B a plan view, of a support with alignment (with vertical shots) (AP.2) or angle ( AP.4) in which an electric cable object of the invention (1) has been arranged.

45 Figure 13 (Fig. 13) .- shows, in Fig. 13A a profile view and Fig. 13B a plan view, of a support with start (APl) or end of line (AP6) sign, equipped with a

Conversion to conventional bare cable (O), in which an electric cable object of the invention (1) is provided.

Figure 14 (Fig. 14) .- shows, in Fig. 14A a profile view and Fig. 14B a 5-floor view, of a support with end-of-line function (AP6), equipped with a conversion to underground, in which has been arranged an electric cable object of the invention (1).

Figure 15 (Fig.15) .- shows, in Fig.15A a profile view and Fig.15B a plan view, of a support with end-of-line, splice or branch function (AP6) equipped with

10 a continuation with cable recommended by the invention (1), in addition to a cross-sectional forecast, in which an electrical cable object of the invention (1) is provided.

Detailed description of the invention and detailed presentation of a preferred embodiment of the invention

A preferred embodiment of the invention is described in detail, among the different possible alternatives, by listing its components as well as its functional relationship based on references to the figures, which have been included, by way of title

2 Or illustrative and not limiting, according to the principles of the claims.

Figure 1 (Fig. 1) .- shows a schematic view of a profile and plan of any aerial laying in which an electric cable object of the invention (1) is used.

25 The cable (1) has been shown in a single continuous line and the following supports can be observed:

-

API: support with line start function; it starts from a line made with a conventional bare cable (O) (represented in the plan as a continuous line 3 O multiple), and continues with a cable object of the invention (1); the annate of

this support is of mooring type;

-

AP2: support with alignment function (with vertical shots); Vertical shots are those produced upwards due to the uneven terrain; The 35th of this support is of type suspension with counterweights or mooring;

-

AP3: support with alignment function, without vertical shots; the assembly of this support is of the suspension type;

4 O -AP4: support with angle function; the support of this support is of mooring type;

-

AP5: support with soft angle function; the angle that is less than 10-150 is called a soft angle; the annado of this support is of type suspension with counterweights;

-

AP6: support with end-of-line, splice or bypass function; In this support, a transfonation center (or interconnect with another line) will not be fed, continuing the line in underground mode, or in conventional air mode (O), or using the cable object of the invention (1) (shown in line discontinuous

5 only); the armed of this support is of mooring type;

Figure 2 (Fig. 2) .- shows a gentleman perspective view of an electric cable object of the invention (1) at the time of coupling bare n-conductors (IIA, IIB, IIC); (in figure n ~ 3).

10 Driver "A" (tiA) is called the one of the tiA phase "" driver "B" (lIB) that of the ItB "phase and driver" C "(lle) to that of the" CIt phase, this being the configuration typical for a three-phase circuit of medium voltage of alternating current (neutral is not required.) It is also valid for a three-phase circuit of medium voltage of direct current,

15 being p. ~. the conductor "A" (IIA) the positive, the conductor "B" (IIB) the negative, and the conductor "e" (11 e) the neutral. The invention makes it possible to use a n other than three, eg n = 2 for a bipolar circuit of medium voltage of direct current. Also n = 4 for a three-phase circuit with neutral, typical of low voltage.

20 Said conductors (IIA, IIB, IIC) are preferably bare constructed with compact round rope of aluminum wires, class 2, according to UNE EN 60228, longitudinally sealed conductor against water. not needing to have steel. They will be placed in separate accommodations (12A, 12B, 12C) through an opening that has been left in them. This opening has an angle (angI2) always less than

25 180 "And normally less than goo (since the materials are not rigid) in order for the driver to snap in and prevent their eviction. The opening is covered with a semiconductor screen in order to standardize the field gradient electrical to which the insulation is subjected (13).

3 O Figure 3 (Fig. 3) .- shows a cross-sectional view of an electric cable object of the invention (1). Fig. 3A: without coupling the bare n-conductors (llA, llB, llC). Fig. 3B: naked n-conductors coupled (11 A, I lB, 1I C); (in figure n ~ 3).

The cable object of the invention (1) is composed of:

to. n-conductors (tI A, 11 B, 11 C) bare constructed with compact wire of alwninium wires or any other conductive material, whose function is to conduct the electric current;

4 or b. an insulator (13) of cylindrical geometry provided with n-housings (l2A, 12B, 12C), covered with a semiconductor screen, shaped like a cylindrical cavity, which have an outer opening that allows the n-conductors to be introduced, exerting a certain pressure (IIA, IIB, tiC), said housings being equidistant from each other and arranged at (360 "/ n); whose function of insulation (13) is to support and maintain electrical insulation between the different conductors (tlA, IIB, tIC) since these are bare; preferably constructed of High Module Ethylene-Propylene (HEPR) capable of

work at a high gradient, which means lower insulation thicknesses, or cross-linked polyethylene (XLPE); It has an outer cover (16) based on additive silicone rubber to protect the insulation of chemical agents, abnospheric as UVA rays, etc .;

C. a resistant core (10,10 ') whose function is to withstand the tensile mechanical tension necessary to support the cable (1); It can be of two types: an insulating resistant core (10) or a conductive resistant core (10 '); preferably it will be made of insulating type (10). The characteristics of each of the two types are described below. The insulating resistant core (10) composed of a dielectric resistant material; preferably consisting of a composite material formed by a plastic or resin matrix, reinforced with fiberglass, electrically and mechanically resistant to the stresses required for tensioning the cable object of the invention (1). Class E fiberglass has a density of 2.58 g / cm3 and a breaking stress of 3445 MPa, 15 has an amorphous structure and isotropic properties. Moisture can be easily absorbed by the fiberglass, reducing its breaking stress; In the present invention, the fiberglass is adequately protected by wrapping it in an insulation (13). The conductive resistant core (10 ') composed of a resistant conductive material (101) protected and insulated by an insulator of the core (102) ~

20 preferably constituted by galvanized steel with HEPR or XLPE cover. Galvanized steel has a breaking stress of 400 MPa. Both souls (10,10 ') can have a central recess to accommodate a plurality of optical fibers for data transmission function;

25 d. a plurality of straight insulating fins (14) and curved insulating fins (15) made of silicone rubber with additives and fillers; preferably of a solid silicone rubber component with high temperature vulcanization (HTV) or two components of liquid silicone rubber that are mixed and vulcanized at high temperature (LSR). The definition of leakage line is the shortest distance 3 O between conductive parts on an insulating surface, therefore it is the function of the plurality of fins (14,15) to increase said leakage line to suitable values according to the electrical voltage to which the conductors (IIA, IIB, IIC) are subjected, defining in each case the nominal voltage of the cable (1). As for the shape of the fins, straight (14) and curved (15) have been devised in order to increase the line of leakage to the desired value and to protect the birdlife from electrocution, achieving the innovative combination of said Fonnas a practically equidistant distribution of holes and a practically null access to the conductive elements (llA, IIB, llC). The number of curved insulating fins (15) is equal to 2 n. and the number of straight insulating fins (14) is variable depending on the internal nominal diameter of the cable 4 O (0ri) and the external nominal diameter of the cable (0.e);

Figure 4 (Fig.4) .- shows a cross-sectional view of an electric cable object of the invention (1), without shading its elements, and in which references of the most significant geometry have been indicated ~ (in the figure n = 3).

The nominal parameters of the electric cable object of the invention (1) are:

- external nominal diameter of the cable (0.e); - internal nominal diameter of the cable (0ri);

5-conductor diameter (0c); -soul diameter (0a); - minimum insulation thickness (e); -open opening angle (angI2);

1.0 being the height of the straight insulating fins (14) equal to 0re; / ifri, and the height of the fins

curved insulators (15) equal to :::::: 1,6. 0re; {'lri obtained graphically by techniques of

CAD for a preferred construction. The opening angle of the housing (ang12) will be large enough to allow the introduction of the conductor (IlA, IlB, IlC) into the housing (12A, 12B, 12C) but as small as possible to

15 disable your eviction. It must be taken into account that the housing is made of material with some flexibility, experiencing an optimal range of ang12 values = 900 ± 10 ° for a preferred construction,

Figure 5 (Fig.5) .- shows an elevation view, in Fig.5A of a suspension clip 20 (2) And in Fig.SB of a tie clip (3), both for an electric cable object of the invention (1).

A suspension clamp in power lines is an accessory that can hold a cable suspended in relation to a support assembly, supporting only small

25 horizontal and vertical components of the tensile force of the cable, moving with respect to its fulcrum to balance said components; for this, the suspension clip is suspended from a chain of suspension insulators. On the contrary, a clamp must support the total horizontal and vertical components of the traction force; for this it is fixed to a chain of mooring insulators.

A suspension clip (2) and a tie clip (3), object of the invention, may carry out the functions indicated in an electric cable object of the invention (1).

Figure 6 (Fig.6) .- shows a view in longitudinal section, in Fig.6A of a suspension clip (2) and in Fig.6B of a tie clip (3), both for an electric cable object of the invention (1).

Figure 7 (Fig. 7) .- shows a cross-sectional view of a suspension clip (2) mounted on the electric cable object of the invention (1). 40 The suspension clip (2) consists of:

8. a tubular housing upper body (26) coupled, to form a tubular housing

by a dovetail coupling (28), to a lower body tubular housing 45 (27) and whose inner diameter is approximately equal to the nominal outside diameter

of the cable (0re), having an upper ear on the outside of it

(29) to accommodate a link ball joint by means of a bolt and safety pin of the type

"autoblock" specified in RU 6617C, providing the complete set of the

Multi-plane housing with threaded n-holes, each arranged at (3600/0) with each other;

S the material of the housing is preferably insulating material but mechanically resistant, eg composite material formed by a plastic or resin matrix reinforced with fiberglass, it can also be constructed of conductive material, eg aluminum or steel;

10 b. n-cable fixing elements (1) consisting of:

for the conductor (1 lA), an insulating element "A" (2IA) of trapezoidal shape that fits in a hole of identical shape and transverse dimensions, which has a

accommodation "A" (12A) occupied by a driver (1 lA), and on whose face

The contact with the conductor has a semiconductor element "A" (20A), and that has a resistant element "A" (22A) attached on its opposite face, which has a circular hole to seat one end of a thyme "A" (25A), the other end of the threaded thyme being to one of said threaded holes of the housing, also carrying a spring washer! LA "(23A) And a

2 O nut "A" (24A) that functions as a locknut;

for the rest of the drivers the same elements; in this case with n = 3,

for the driver (11 B) and the driver (11 C).

25 Figure 8 (Fig. 8) .- shows a cross-sectional view of a clamp (3)

mounted on an electric cable object of the invention (1).

The mooring clip (3) consists of:

3 O 8. a tubular housing upper body (26) coupled to form a tubular housing by a dovetail coupling (28) to a lower tubular housing body (27), whose inner diameter will be approximately equal to the outer nominal diameter of the cable (0re), disposing on the outside of it an upper ear

(29) and diametrically opposite of a second lower ear (30), to accommodate paths

3S link ball joints by means of bolt and safety pin of the "self-locking" type

specified in RU 66l7C, providing the complete set of the various housing

planes with n-threaded holes each arranged at (360 '/ n) each other; the material of the

The housing is preferably insulating material but mechanically resistant, eg composite material formed by a plastic or resin matrix, reinforced with 4 O glass fiber, and can also be constructed of conductive material, eg aluminum or steel;

b. n-cable fixing elements (1) consisting of:

for the conductor (1 lA), a trapezoidal insulating element "A" (2IA) that

45 fits into a hole of identical shape and transversal dimensions, which has a

accommodation "A" (12A) occupied by a driver (IlA), and on whose face

Contact with the conductor (IIA) has a semiconductor element "A" (20A), and which has a resistant element "A" (22A) attached on its opposite face, which has a circular hole to seat one end of a "A" socket (25A), the other end of the thread being threaded to one of the aforementioned

5 threaded holes of the housing, also carrying an itA "spring washer" (23A) and a "A" nut (24A), which functions as an o-nut;

for the rest of the drivers the same elements; in this case with n =: 3, for the driver (11 B) and the driver (11 C).

10 Figure 9 (Fig. 9) .- shows, in Fig. 9A a plan view and Fig. 98 a profile view of an outdoor tenninal (4).

The exterior tenninal (4) of manufacturing type "KIT", that is, a set of elements 15 for assembly by qualified in-si / u personnel, and consists of:

to. a mooring clip (3) that at one end receives an electric cable object of the invention (1) said end being sealed with polymeric foam or the like of high moisture resistance and whose other end is coupled to a body (40) in which

2 Or inside there is a module adaptable to bare wires, any of the prior art, and connecting with a plurality of polymeric terminals (4IA, 4IB, 41C);

b. a hole in a body (40) prepared to remove the insulating resistant core (10) or conductive (10 ');

Figure 10 (Fig. I) .- shows, in Fig. 1A an elevation view and Fig. IO a plan view, of a support with alignment function (AP.3) in which an object electric cable has been arranged of the invention (1).

30 Note that a suspension clip (2) suspended from a composite insulator has been used as a function of suspension, the assembly is arranged in a vault type.

Figure 11 (Fig.ll) .- shows, in Fig.l1A an elevation view and Fig.llB a plan view, of a support with soft angle function (AP.5) in which a cable has been arranged electric object of the invention (1).

Note that a suspension clip (2) suspended from two composite insulators, arranged in "V", has been used, depending on the suspension provided with the set 4 O in a vault type.

Figure 12 (Fig. 12) .- shows, in Fig. 12A an elevation view and Fig. 12B a plan view, of a support with alignment function (with vertical shots) (AP.2) or angle (AP .4) in which an electric cable object of the invention (1) is provided.

Note that a tie clip (3) attached to three insulators has been used

compounds, arranged in "YU, in mooring function, arranged in a set

Vault type.

5 Figure 13 (Fig. 13) .- shows, in Fig. 13A a profile view and Fig. 13B a plan view, of a support with start (API) or end of line (AP6) function, equipped with a

Conversion to conventional bare cable (O), in which a cable is provided

electric object of the invention (1).

10 Note that an outdoor groove (4) has been used, fixed to two insulators composed in mooring function, one upper and one lower, the assembly arranged in a dome-type assembly. The resistant insulating (10) or conductive (10 ') core has been fixed by means of a clamp, regardless of the state of the art, located in the insulator composed of lower tie. Tenninales have been connected (41A, 41B, 41C)

15 with each of the three phases of any overhead power line of the prior art (O), which arranged in a crosshead are tied with composite insulators in mooring function.

Figure 14 (Fig. 14) .- shows, in FIg. 14A a profile view and Fig. 14B a 2-floor view of a support with end-of-line function (AP6), equipped with a conversion to underground, in which an electric cable object of the invention (1) has been arranged.

Note that an outdoor tenninal (4) fixed to two composite insulators in mooring function has been used, one upper and one lower, the assembly arranged in a

25 armed vault type. The resistant insulating (10) or conductive (10 ') core has been fixed by means of a mooring clip, whatever is in the state of the art, located in the insulator composed of lower mooring. The tenninals (4IA, 4 1B, 41C) have been connected to each of the three phases of any underground electrical line of the prior art (O), with its elements, self-valves and external tenninals,

3 Or arranged in a crosshead.

Figure 15 (Fig.15) .- shows, in FIg.15A a profile view and Fig.15B a plan view of a support with end-of-line, splice or branch function (AP6) equipped with

a continuation with cable recommended by the invention (1), in addition to a forecast

35 bypass, in which an electrical cable object of the invention (1) has been arranged.

Note that, on the one hand, an exterior tenninal (4) fixed to two insulators composed in mooring function, one upper and one lower, has been used, arranged the 4 O set in a vault type annate. The resistant insulating (10) or conductive (10 ') core has been fixed by means of a mooring clip, whatever is in the state of the art, located in the insulator composed of lower mooring. The

tenninales (41A.41B, 41C) with each of the three phases of a system identical to that described but arranged on the other side. The described arrangement is suitable for:

-

make a connection of an electric cable object of the invention (1); - make a derivation of an electric cable object of the invention (1);

Claims (4)

l. N-polar cable consisting of n bare unipolar conductors (1) and their accessories: suspension clip (2), tie clip (3) and outdoor terminal (4), of the type of 5 those that incorporate a plurality of conductors used to build power lines ~ characterized by: •. an electric cable (1) composed of: 10 -n-conductors (IIA, IIB, tIC) naked, whose function is to conduct the electric current;

-

an insulator (13) of cylindrical geometry provided with n-housings (12A, 12B, 12C), covered with a semiconductor screen, shaped like a cylindrical cavity 15 with an outer opening that allows to introduce, exerting a certain pressure, the n · conductors ( 11 A, II B, II C), said housings being equidistant from each other and arranged at (360 "/ n), whose function of insulation (13) is to support and maintain electrical insulation between the different conductors (IIA, IIB, IIC ) since these are bare and have an outer cover (16) for protection

2 Or outside;

-

a resistant core (10,10 ') whose function is to withstand the tensile mechanical tension necessary to support the cable (1);

25 -a plurality of straight insulating fins (14) and curved insulating fins (15), its function being to increase the leakage line and that of birdlife protection; b. a suspension clip (2) composed of: 3 Or -a upper body tubular casing (26) coupled to connect a tubular casing by means of a dovetail coupling (28) to a lower tubular casing body (27), and whose inner diameter is approximately equal to the nominal external diameter of the cable (0 <e), disposing on the outside of an upper ear (29) to accommodate a link ball joint by means of a bolt and safety pin, and 35 providing the complete housing assembly with several planes with threaded n-holes each arranged at (3600 / n) with each other;

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n · cable fixing elements (1) consisting of: for the conductor (1 lA), an insulating element "A" (21A) of trapezoidal shape that fits into a gap of identical 40 fonna and transverse dimensions, which has a housing "A" (12A) occupied by a conductor (IIA), and whose contact face with the conductor has a semiconductor element "A" (20A), and which has a resistant element "A" attached on its opposite face (22A), which has a circular recess to seat one end of a "A" thyme (25A), the other end of the threaded thyme being at one of said threaded holes of the housing, also carrying a spring washer "A" (23A) and a nut "A" (24A) that functions as a locknut; Y

for the rest of the drivers the same elements; in this case with n = 3, for the driver (IIB) and the driver (IIC). C. a mooring clip (3) identical to the suspension clip (2) but having 5 in addition to a lower ear (30) diametrically opposed to an upper ear (29); d. an outdoor tennioal (4) of manufacturing type "KIT", that is, a set of elements for assembly by qualified personnel on-site, and consisting of: 10 -a tie clip (3) that at one end receives a cable (1), said end being sealed with polymeric foam or similar of high moisture resistance, and whose other end is coupled to a body (40) in whose interior a module adaptable to bare wires is available, any of the prior art, and that connects with a plurality of polymeric tenninales (41A, 41B, 41C) of 15 outside;

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a hole in a body (40) prepared to remove a resistant soul (10.10 ');

2. N-polar cable connected by n bare unipolar conductors (1) and their accessories 20 (2,3,4), according to claim 1, characterized in that the resistant soul is an insulating resistant soul (10). 3. N-polar cable connected by n bare unipolar conductors (1) and its accessories (2,3,4), according to claim 1, characterized by the fact that the soul Resistant is a conductive resistant core (10 ') composed of a resistant conductive material (101) protected and insulated by a core insulator (102); 4. N-polar cable connected by n bare unipolar conductors (1) and their accessories (2,3,4), according to previous claims, characterized by the fact that 3 Or both souls (10,10 ') may have a central recess to accommodate a plurality of optical fibers for data transmission signing;