Power cord accessory kit
Patent Information
- Application Number
- ES2022178428T
- Authority / Receiving Office
- ES · ES
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-06-10
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2042-06-10
Smart Images
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Abstract
Description
Power cord accessory kit Technical field This disclosure generally relates to power cord accessories. Background When power cable accessories such as splices and terminations are installed, the insulation of the power cable or cables is partially stripped from the conductor(s) near the spliced conductor. This can result in an undesirable phenomenon called shrinkage when the cable heats up during operation if the insulation is polymeric. Shrinkage occurs when the insulation is pulled away from the spliced conductor due to mechanical stresses inherent in the insulation during the manufacturing process. This increases the risk of electrical failure due to the insulation edge shifting from its intended design position. EP1158638 discloses a solution for reducing the risk of shrinkage. According to EP1158638, a cable joining arrangement comprises a connecting tube sleeve for mechanically joining two conductors of a first and a second cable, wherein the tube sleeve comprises a circumferential groove at either end. The groove is adapted to interact with an anchoring element, and the anchoring element is further adapted to interact with a cut groove in the cross-linked polyethylene (XLPE) insulation of the cable end, such that the tube sleeve is mechanically connected to the insulation of either cable end. There is a risk of flexing of the flanges in the XLPE insulation attached to the anchoring element. At a certain contraction force and increased temperature, these flanges can detach from the anchoring elements due to the relatively low flexural rigidity of XLPE at elevated temperatures. The first power cable can be a high voltage power cable, for example, for voltages above 72 kV. EP 1158638 A1 discloses an arrangement comprising a high-conductivity metal tube mounted and mechanically secured to the stripped ends of conductors and annular grooves in the insulation at a distance from the ends, secured by a high-tensile element. The wall thickness of the tube is approximately that of the insulation of both conductors. A groove is formed in both end regions of the reduced-diameter tube, and an anchoring element engages with the grooves in the insulation and the tube. The arrangement has a high-conductivity metal tube mounted and mechanically secured to the stripped ends of mutually coaxial conductors and annular grooves formed in the insulation at a distance from the ends, secured by a high-tensile element. US Patent 5416272 A discloses an insulation shrinkage prevention device to prevent the insulation from shrinking back on a synthetically insulated power cable that is to receive connecting equipment at a "prepared" end. The device includes a shoulder ring mounted on the prepared end and secured to the bare conductor. The ring has a fixing shoulder for attaching to the periphery of the insulation, a butt shoulder for abutting against the end of the insulation, and an integrated retaining device to secure the ring to the bare conductor. Document KR 20210120368 A discloses a conductor connection structure that omits corona protection in an intermediate junction box of a power cable and sufficiently ensures the thickness of a sleeve member attached to the conductor with a fractured bolt to ensure the fastening force between the sleeve member and the power cable conductor. Document JP 6280460 B2 discloses a conductor connection piece. An insulation layer linking piece surrounds an outer circumference of the conductor connection piece; both ends of the insulation layer linking piece extend in an axial direction, respectively, and a pair of insulation layers are held by both extending ends, respectively, so that the pair of insulation layers are linked over the conductor connection piece. Compendium A general object of the present disclosure is to provide a power cord accessory assembly that solves or at least mitigates the problems of the prior art. Therefore, a power cable accessory assembly is provided comprising: a first power cable comprising: a first conductor and a first electrical insulation layer disposed around the first conductor, wherein the first electrical insulation layer comprises a first insulation groove extending circumferentially along an outer surface of the first electrical insulation layer, a connecting sleeve comprising: a first axial end opening receiving an end portion of the first conductor protruding axially from the first electrical insulation layer,and a first locking sleeve groove extending circumferentially along an outer surface of the connecting sleeve; and a first locking sleeve comprising: a first inwardly extending radial flange engaging the first insulation groove and a second inwardly extending radial flange engaging the first locking sleeve groove to restrict axial movement between the first electrical insulation layer and the connecting sleeve, wherein the first inwardly extending radial flange has a first radial dimension that gradually decreases in an axial direction toward the connecting sleeve, and wherein the first insulation groove has a second radial dimension that gradually decreases in the axial direction toward the connecting sleeve. Due to the angled shape of the first insulation groove and the first inwardly extending radial flange,The first locking sleeve will push the first layer of electrical insulation towards the first underlying conductor, thus increasing the frictional force to balance the axial contraction force. Furthermore, the temperature increase enhances the frictional force because the first layer of electrical insulation expands radially. Therefore, the risk of shrinkage can be reduced. The first power cable can be a medium voltage power cable, for example, for voltages in the range of 1-72 kV. The first power cable can be an AC power cable or a DC power cable. The first layer of electrical insulation can be an extruded layer. According to one embodiment, the first gradually decreasing radial dimension decreases at a first linear rate. A first inwardly extending, radially projecting surface of the first radial dimension that defines the gradual decrease can therefore have a constant slope. According to one embodiment, the second radial dimension, which gradually decreases, decreases at the first linear rate. A surface of the first insulation groove that defines the gradual decrease of the second radial dimension can therefore have a constant slope that is the same as that of the first inwardly extending radially surface of the first flange. According to one embodiment, the first inwardly extending radial flange has a maximum radial dimension that is greater than a maximum radial dimension of the second inwardly extending radial flange. According to the invention, the first inwardly extending radial flange has a surface defining the first gradually decreasing radial dimension, wherein in a longitudinal section of the first locking sleeve, the surface defines an axis intersecting a longitudinal axis of the first locking sleeve at an angle in the range of 15-80 degrees, such as 20-80 degrees, such as 25-75 degrees, or such as 30-70 degrees. According to one embodiment, the first radial dimension gradually decreases in an axial direction toward the connecting sleeve by an axial length that is between 1 / 3 and 2 / 3 of the largest radial thickness of the first electrical insulation layer outside the first insulation groove. According to one embodiment, the first layer of electrical insulation has a smaller first radial insulation thickness in the first insulation groove, and a larger radial thickness outside the first insulation groove, wherein the smaller first radial insulation thickness is in the range of 1 / 3 to 1 / 2 of the larger radial thickness of the first layer of electrical insulation. According to one embodiment, the first electrical insulation layer comprises a thermosetting polymer such as cross-linked polyethylene, XLPE. According to one embodiment, the first flange extending radially inwards has a far edge with respect to the connecting sleeve, the far edge being rounded or beveled. According to one embodiment, the power cord accessory assembly forms a power cord termination. According to one embodiment, the power cable accessory assembly forms a power cable junction and comprises: a second power cable comprising: a second conductor and a second electrical insulation layer disposed around the second conductor, wherein the second electrical insulation layer comprises a second insulation groove extending circumferentially along an outer surface of the second electrical insulation layer, wherein the connecting sleeve is disposed axially between the first electrical insulation layer and the second electrical insulation layer, and comprises: a second axial end opening receiving an end portion of the second conductor protruding axially from the second electrical insulation layer, a second locking sleeve groove extending circumferentially along an outer surface of the connecting sleeve;and a second locking sleeve comprising a third inwardly extending radial flange engaging the second insulation groove and a fourth inwardly extending radial flange engaging the second locking sleeve groove to restrict axial movement between the second electrical insulation layer and the connecting sleeve, wherein the third inwardly extending radial flange has a third radial dimension that gradually decreases in an axial direction towards the connecting sleeve, and wherein the second insulation groove has a fourth radial dimension that gradually decreases in the axial direction towards the connecting sleeve. The second power cable can be a medium voltage power cable, for example, for voltages in the range of 1-72 kV. The second power cable can be a high voltage power cable, for example, for voltages above 72 kV. The second power cord can be either an AC power cord or a DC power cord. The second power cord is an AC power cord if the first power cord is an AC power cord, and a DC power cord if the first power cord is a DC power cord. The second layer of electrical insulation can be an extruded layer. According to one embodiment, the gradually decreasing third radial dimension decreases at a second linear rate. A radially inwardly extending surface of the third flange that defines the gradually decreasing third radial dimension can therefore have a constant slope. According to one embodiment, the fourth radial dimension gradually decreases at the second linear rate. A surface of the second insulation groove that defines the gradual decrease of the fourth radial dimension can therefore have a constant slope that is the same as that of the second flange that extends radially inwards. According to one embodiment, the third inwardly extending flange has a surface defining the gradually decreasing third radial dimension, wherein in a longitudinal section of the second locking sleeve the surface defines an axis intersecting a longitudinal axis of the second locking sleeve at an angle in the range of 15-80 degrees, such as 20-80 degrees, such as 25-75 degrees, such as 30-70 degrees. According to one embodiment, the third radial dimension gradually decreases in an axial direction towards the connecting sleeve by only an axial length that is between 1 / 3 and 2 / 3 of the larger radial thickness of the second layer of electrical insulation outside the second insulation groove. According to one embodiment, the second layer of electrical insulation has a second, smaller radial insulation thickness in the second insulation groove, and a larger radial thickness outside the second insulation groove, wherein the second, smaller radial insulation thickness is in the range of 1 / 3 to 1 / 2 of the larger radial thickness of the second layer of electrical insulation. The first locking sleeve groove can be arranged in a first axial end portion of the connecting sleeve, and the second locking sleeve groove can be arranged in a second axial end portion of the connecting sleeve. The first end portion and the second end portion are arranged on opposite axial ends of the connecting sleeve. Generally, all terms used in the claims should be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "an element, apparatus, component, means," etc., should be interpreted broadly as referring to at least one instance of the element, apparatus, component, means, etc., unless explicitly stated otherwise. Brief description of the drawings The specific embodiments of the inventive concept will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 schematically shows a longitudinal section of an example part of a power cable accessory assembly; and Fig. 2 schematically shows a longitudinal section of an example part of a power cable accessory assembly comprising a power cable joint. Detailed description The inventive concept will now be described in more detail below with reference to the accompanying drawings, which show illustrative embodiments. However, the inventive concept can be realized in many different ways and should not be interpreted as being limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure is comprehensive and complete, and fully conveys the scope of the inventive concept to those skilled in the art. Similar numbers refer to similar elements throughout the description. Fig. 1 shows an example of a power cable accessory assembly 1. The power cord accessory assembly 1 comprises a first power cord 3. The first power cable 3 comprises a first conductor 5 and a first electrical insulation layer 7 arranged around the first conductor 5. The first power cable 3 may comprise an inner semiconducting layer (not shown) disposed between the first conductor 5 and the first electrical insulation layer 7. The first electrical insulation layer 7 may comprise a thermosetting polymer. The thermosetting polymer may be, for example, XLPE, crosslinked ethylene propylene diene monomeric rubber (EPDM), or crosslinked ethylene propylene rubber (EPR). The first electrical insulation layer 7 comprises a first insulation groove 9. The first insulation groove 9 extends circumferentially along an outer surface of the first electrical insulation layer 7. The first insulation groove 9 can extend circumferentially around the entire periphery of the first electrical insulation layer 7. The first insulation slot 9 can be manufactured using a tool such as a custom blade. The power cable accessory assembly 1 comprises a connection sleeve 11. The connection sleeve 11 comprises metal such as steel, copper, or aluminum. The connection sleeve 11 comprises a first axial end opening configured to receive an end portion of the first conductor 5 that protrudes axially from the first electrical insulation layer 7. The end portion of the first conductor 5 can be secured within the connection sleeve 11. The end portion of the first conductor 5 can, for example, be secured within the connection sleeve 11 by means of screws or bolts. The connecting sleeve 11 has a first locking sleeve groove 13 that extends circumferentially along an outer surface of the connecting sleeve 11. The first locking sleeve groove 13 can be extended circumferentially around the entire periphery of the connecting sleeve 11. The power cable accessory assembly 1 comprises a first locking sleeve 15. The first locking sleeve 15 can be made of metal such as steel, for example, stainless steel, copper, or aluminum. The first locking sleeve 15 can comprise two halves that can be assembled together around the first power cable 3, for example, by means of screws. The first locking sleeve 15 comprises a first inwardly extending radial flange 15a. The first inwardly extending radial flange 15a can extend circumferentially around the entire inner periphery of the first locking sleeve 15. The first flange extending radially inwards 15c is configured to engage the first insulation groove 9. The first locking sleeve 15 has a second flange extending radially inwards 15b configured to engage the first locking sleeve groove 13. The second inwardly extending radial flange 15b can extend circumferentially around the entire inner periphery of the first locking sleeve 15. The first flange extending radially inwards 15a has a first radial dimension that gradually decreases in an axial direction towards the connecting sleeve 11. The first radial dimension that gradually decreases decreases at a first linear rate. The first insulation slot 9 has a second radial dimension that gradually decreases in the axial direction towards the connecting sleeve 11. According to one example, the second radial dimension gradually decreases at the first linear rate. The first inwardly extending radial flange has a surface 15c which, in a longitudinal section of the first locking sleeve 15, defines the first gradually decreasing radial dimension. Surface 15c is parallel to an inner surface of the first insulation groove 9 when the first inwardly extending radial flange 15a is received by the first insulation groove 9. Surface 15c defines an axis A that intersects a longitudinal axis B of the first locking sleeve 15 at an angle in the range of 15-80 degrees, such as 20-80 degrees, such as 25-75 degrees, such as 30-70 degrees. In a longitudinal section of the power cable fitting assembly 1, the first insulation groove 9 and the first radially inwardly extending flange 15a may be congruent. The first flange extending radially inwards 15a may have a far edge 15d with respect to the connecting sleeve 11 that is rounded or beveled. The first inwardly extending radial flange 15a may have a maximum radial dimension that is greater than the maximum radial dimension of the second inwardly extending radial flange 15b. Therefore, the first insulating groove 9 may be radially deeper than the first locking sleeve groove 13. The first radial dimension can gradually decrease in an axial direction towards the connecting sleeve 11 by an axial length b that is between 1 / 3 and 2 / 3 of the greatest radial thickness tmax of the first layer of electrical insulation 7 outside the first insulation groove 9. Therefore, the axial length b of surface 15c can be 1 / 3tmax <b<2 / 3tmáx. The first layer of electrical insulation 7 has a smaller first radial insulation thickness tmin in the first insulation groove 9. Therefore, the first electrical insulation 7 is thinner in the first insulation groove 9. The smaller first radial insulation thickness tmin can be within the range of 1 / 3 to 1 / 2 of the larger radial thickness tmax of the first layer of electrical insulation 7, i.e., 1 / 3tmax <tmin<1 / 2tmax. La distancia axial A desde una cara de extremo radial de la primera capa de aislamiento eléctrico 7 encarada al manguito de conexión 11 al borde más cercano de la primera ranura de aislamiento 9 puede estar, por ejemplo, entre 7-35 mm, tal como 10-30 mm, dependiendo del material de aislamiento y las dimensiones del primer cable de alimentación. The inclined inner surface of the first insulation slot 9 facing surface 15c can, in an axial direction from the connecting sleeve 11 towards the first insulation slot 9, transition to a flat lower surface that is parallel to the longitudinal axis B. Furthermore, in the axial direction from the connecting sleeve 11 towards the first insulation slot 9, the flat lower surface can transition to a rounded or straight inclined portion with respect to the longitudinal axis B before turning to a radial surface that defines the end of the first insulation slot 9. The axial distance c from the point where the flat lower surface begins to the point of transition to the radial surface can be, for example, 2-12 mm, such as 3-8 mm. The rounded or straight angled portion of the first insulation groove 9 may be congruent with the far edge 15d of the first inwardly extending radially 15a flange. The radial thickness d1 of the first locking sleeve 15 in a portion between the first radially inwardly extending flange 15a and the second radially inwardly extending flange 15b, which may be the radially thinner dimension of the first locking sleeve 15, may be, for example, 2–8 mm or 3–5 mm. This dimension depends on the thickness of the first electrical insulation layer and the material of the first electrical insulation layer. The radial distance d2 from the inner surface of the first locking sleeve 15, where the first locking sleeve 15 has radial thickness d1, to the bottom of the first insulation groove 9 can be in the range of 1 / 3 to 1 / 2 of the largest radial thickness tmax of the first electrical insulation layer 7, i.e., 1 / 3tmax <d2<1 / 2tmax. The first locking sleeve 15 has an outer surface that is essentially level or flush with the outer surface of the first electrical insulation layer 7. The first locking sleeve 15 has an outer surface that is essentially level or flush with the outer surface of the connecting sleeve 11. The connecting sleeve 11, the first locking sleeve 15, and the first power cable 3 can form part of a power cable joint or a power cable termination. The term "accessory" in "power cable accessory assembly" can therefore refer to either a power cable joint or a power cable termination. According to the example, the power cable accessory assembly 1 comprises a deflector 17. The deflector 17 comprises an electrically conductive material. The deflector 17 is arranged radially outside the connection sleeve 11, the first locking sleeve 15 and the first electrical insulation layer 7. The deflector 17 covers the entire first locking sleeve 15 axially. The deflector 17 extends axially beyond the first locking sleeve 15 in an axial direction from the connecting sleeve 11 towards the first insulating groove 9. The power cable accessory assembly 1 may comprise a field-grading layer (not shown) arranged radially outside the baffle 17. The field-grading layer may comprise a rubber material comprising a filler material to provide the field-grading property. The power cable accessory assembly 1 may comprise a bonding insulation layer (not shown) arranged radially around at least a portion of the axial length of the field-grading layer. The bonding insulation layer may comprise, for example, a polymeric material such as XLPE, EPDM, EPR, or polypropylene. The power cable accessory assembly 1 may comprise a rigid housing, such as a metal casing, or a heat-shrink tube arranged around the bonding insulation layer. The rigid housing or the heat-shrink tube forms an outer surface of the power cable accessory assembly 1. Deflector 17, field gradation layer and joint isolation layer can be part of a prefabricated joint isolation sleeve. Figure 2 shows an example where the power cable accessory assembly 1 forms a power cable joint. The left side of the power cable accessory assembly 1 with respect to the connection sleeve 11 is shown in Figure 2. This side is identical to the right side already shown in Figure 1. The power cable accessory assembly 1 comprises a second power cable 20. The second power cable comprises a second conductor 22 that is spliced or joined to the first conductor 5 of the first power cable 2 within the connection sleeve 11. The second power cable 20 comprises a second layer of electrical insulation 18 arranged around the second conductor 22. The second electrical insulation layer 18 comprises a second insulation groove 19 extending circumferentially along an outer surface of the second electrical insulation layer 18. The connection sleeve 11 is arranged axially between the first layer of electrical insulation 7 and the second layer of electrical insulation 18. The connection sleeve 11 comprises a second axial end opening configured to receive an end portion of the second conductor 22 that protrudes axially from the second electrical insulation layer 18. The connecting sleeve 11 comprises a second locking sleeve groove 23 that extends circumferentially along an outer surface of the connecting sleeve 11. The power cord accessory assembly 1 comprises a second locking sleeve 25 comprising a third inwardly extending flange 25a configured to engage the second insulation groove 19, and a fourth inwardly extending flange 25b configured to engage the second locking sleeve groove 23. The third flange 25a extending radially inwards has a third radial dimension that gradually decreases in an axial direction towards the connecting sleeve 11, and the second insulation groove 19 has a fourth radial dimension that gradually decreases in the axial direction towards the connecting sleeve 11. The overall structure of the second connecting sleeve 25 and the second insulation groove 19 is the same as for the first connecting sleeve 15 and the first insulation groove 9 described above, and for this reason it will not be described in further detail in this document. If the power cable accessory assembly forms part of a power cable termination, the first conductor of the first power cable connection sleeve may be connected to a conductor within a cable termination housing by means of the connection sleeve. In this case, the deflector may form part of a stress cone arranged around the first locking sleeve. The inventive concept has been described above with reference mainly to a few examples. However, as readily apparent to a person skilled in the art, other embodiments besides those disclosed above are also possible within the scope of the inventive concept as defined by the appended claims.
Claims
1. A power cable accessory assembly (1) comprising: a first power cable (3) comprising: a first conductor (5), and a first electrical insulation layer (7) disposed around the first conductor (5), wherein the first electrical insulation layer (7) comprises a first insulation groove (9) extending circumferentially along an outer surface of the first electrical insulation layer (7), a connection sleeve (11) comprising: a first axial end opening receiving an end portion of the first conductor (5) protruding axially from the first electrical insulation layer (7),and a first locking sleeve groove (13) extending circumferentially along an outer surface of the connecting sleeve (11); and a first locking sleeve (15) comprising: a first inwardly extending radial flange (15a) engaging the first insulation groove (9) and a second inwardly extending radial flange (15b) engaging the first locking sleeve groove (13) to restrict axial movement between the first electrical insulation layer (7) and the connecting sleeve (11), characterized in that the first inwardly extending radial flange (15a) has a first radial dimension that gradually decreases in an axial direction towards the connecting sleeve (11), and wherein the first insulation groove (9) has a second radial dimension that gradually decreases in the axial direction towards the connecting sleeve (11),wherein the first radially inwardly extending flange (15a) has a surface (15c) defining the first gradually decreasing radial dimension, wherein in a longitudinal section of the first locking sleeve (15) the surface (15c) defines an axis (A) intersecting a longitudinal axis (B) of the first locking sleeve (15) at an angle (A) in the range of 15-80 degrees, such as 20-80 degrees, such as 25-75 degrees, such as 30-70 degrees.
2. The power cable accessory assembly (1) according to claim 1, wherein the first radial dimension gradually decreases at a first linear rate.
3. The power cable accessory assembly (1) according to claim 2, wherein the second radial dimension gradually decreases at the first linear rate.
4. The power cable accessory assembly (1) according to any of the preceding claims,wherein the first inwardly extending radial flange (15a) has a maximum radial dimension that is greater than a maximum radial dimension of the second inwardly extending radial flange (15b).
5. The power cable fitting assembly (1) according to any of the preceding claims, wherein the first radial dimension gradually decreases in an axial direction toward the connecting sleeve (11) by an axial length (b) that is between 1 / 3 and 2 / 3 of the greater radial thickness (tmax) of the first electrical insulation layer (7) outside the first insulation groove (9).
6. The power cable fitting assembly (1) according to any of the preceding claims, wherein the first electrical insulation layer (7) has a smaller first radial insulation thickness (tmin) at the first insulation groove (9), and a larger radial thickness (tmax) outside the first insulation groove (9).wherein the first smaller radial insulation thickness (tmin) is within the range of 1 / 3 to 1 / 2 of the larger radial thickness (tmax) of the first electrical insulation layer (7).
7. The power cable fitting assembly (1) according to any of the preceding claims, wherein the first electrical insulation layer (7) comprises a thermosetting polymer such as cross-linked polyethylene, XLPE.
8. The power cable fitting assembly (1) according to any of the preceding claims, wherein the first inwardly extending radial flange (15a) has a far edge (15d) with respect to the connection sleeve (11), the far edge (15d) being rounded or beveled.
9. The power cable fitting assembly (1) according to any of the preceding claims,forming a power cable termination.
10. The power cable accessory assembly (1) according to any of claims 1-8, wherein the power cable accessory assembly (1) forms a power cable joint, the power cable accessory assembly (1) comprising: a second power cable (20) comprising: a second conductor (22), and a second electrical insulation layer (18) disposed around the second conductor (22), wherein the second electrical insulation layer (18) comprises a second insulation groove (19) extending circumferentially along an outer surface of the second electrical insulation layer (18), wherein the connection sleeve (11) is disposed axially between the first electrical insulation layer (7) and the second electrical insulation layer (18),and comprises: a second axial end opening receiving an end portion of the second conductor (22) projecting axially from the second electrical insulation layer (18), a second locking sleeve groove (23) extending circumferentially along an outer surface of the connecting sleeve (11); and a second locking sleeve (25) comprising a third inwardly extending radially (25a) engaging the second insulation groove (19) and a fourth inwardly extending radially (25b) engaging the second locking sleeve groove (23) to restrict axial movement between the second electrical insulation layer (18) and the connecting sleeve (11), wherein the third inwardly extending radially (25a) has a third radial dimension gradually decreasing in an axial direction toward the connecting sleeve (11),and wherein the second insulation groove (19) has a fourth radial dimension that gradually decreases in the axial direction toward the connecting sleeve (11).
11. The power cable accessory assembly (1) according to claim 10, wherein the third radial dimension gradually decreases at a second linear rate.
12. The power cable accessory assembly (1) according to claim 11, wherein the fourth radial dimension gradually decreases at a second linear rate.
13. The power cable accessory assembly (1) according to any one of claims 10-12, wherein the inwardly extending third flange (25a) has a surface defining the gradually decreasing third radial dimension.wherein in a longitudinal section of the second locking sleeve (25) the surface defines an axis that intersects a longitudinal axis (B) of the second locking sleeve (25) at an angle in the range of 15-80 degrees, such as 20-80 degrees, such as 25-75 degrees, such as 30-70 degrees.
14. The power cable accessory assembly (1) according to any of claims 10-13, wherein the third radial dimension gradually decreases in an axial direction towards the connecting sleeve (11) only over an axial length that is between 1 / 3 and 2 / 3 of the greater radial thickness of the second electrical insulation layer (18) outside the second insulation groove (29).