WO2011155110A1 - ケーブル終端接続部 - Google Patents
ケーブル終端接続部 Download PDFInfo
- Publication number
- WO2011155110A1 WO2011155110A1 PCT/JP2011/002023 JP2011002023W WO2011155110A1 WO 2011155110 A1 WO2011155110 A1 WO 2011155110A1 JP 2011002023 W JP2011002023 W JP 2011002023W WO 2011155110 A1 WO2011155110 A1 WO 2011155110A1
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- WIPO (PCT)
- Prior art keywords
- cable
- stress cone
- insulator
- rubber stress
- cable insulator
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
- H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
- H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
- H02G15/068—Cable terminating boxes, frames or other structures with devices for relieving electrical stress connected to the cable shield only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/021—Use of solid insulating compounds resistant to the contacting fluid dielectrics and their decomposition products, e.g. to SF6
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
Definitions
- the present invention relates to a cable termination connection portion, and more particularly to a cable termination connection portion in which a rubber stress cone is attached to the outer periphery of a cable insulator.
- a rubber stress cone 110 is attached to the outer periphery of the cable insulator 100, and the rubber stress cone 110 is epoxy-bonded. By pressing toward the seat 120, insulation at the interface between the cable insulator 100 and the rubber stress cone 110 is secured (for example, Patent Document 1).
- the inner diameter of the rubber stress cone 110 is set. It is necessary to make it smaller than the outer diameter of the cable insulator 100, and it is necessary to treat the outer peripheral portion of the cable insulator 100 at the construction site in order to improve the adhesion of the interface.
- a section (hereinafter referred to as “finishing range”) L0 extending from the front end portion of the outer semiconductive layer 130 to the front end portion of the cable insulator 100 is polished by, for example, glass cutting or sandpaper. (For example, Patent Document 2).
- the finishing range L0 is about 2 to 3 m, for example, the stroke length of insertion of the rubber stress cone 110 becomes long, and as a result, the cable 200 is stripped. It took a lot of time (about 2 to 3 hours per phase), and it took time and effort to install the rubber stress cone 110.
- reference numeral 210 is a pressing device for the rubber stress cone 110
- 220 is an anticorrosion layer
- 300 is a saddle tube
- 310 is a bottom fitting
- 320 is a lower fitting
- 400 is an insulating fluid
- 500 is an upper fitting
- 600 is an upper covering
- Reference numeral 700 denotes a support insulator.
- An object of the present invention is to provide a cable termination connecting portion that can greatly reduce the labor of assembling work by reducing the surface treatment range of the cable insulator and reducing the labor at the time of inserting the rubber stress cone. It is.
- the cable external semiconductive layer and the cable insulator are exposed by stepping off the end of the cable, and a predetermined process is performed on the distal end side of the cable external semiconductive layer.
- a cable-filled soot tube, and an outer peripheral portion of the cable insulator includes a first processing portion to which a rubber stress cone is attached, and a first processing portion extending from the distal end portion of the first processing portion to the distal end portion of the cable insulator.
- the outer diameter of the first processing section is made larger than the inner diameter of the rubber stress cone, and the outer diameter of the second processing section is made thinner than the inner diameter of the rubber stress cone.
- Cable insulation in the second processing unit are those having a thickness of at least a second electric field applied in the radial direction of the cable insulation than the electric field applied in the axial direction of the processor is increased.
- the taper part which is diameter-reduced toward is provided.
- a predetermined surface treatment is applied to the outer surface of the first processing portion.
- the outer surface of the tapered portion is subjected to a predetermined surface treatment.
- the cable termination connection portion of the present invention has the following effects.
- the outer peripheral portion of the cable insulator exposed by the stripping process at the end of the cable is positioned on the distal end side of the first processing portion to which the rubber stress cone is attached and the first processing portion. Since the outer diameter of the second processing section is narrower than the inner diameter of the rubber stress cone, the rubber stress cone is inserted into the second processing section. As a result, the labor required for attaching the rubber stress cone is greatly reduced as compared with the conventional cable terminal connection portion.
- the outer surface of the first processing unit is subjected to a predetermined surface treatment, and the cable insulator in the second processing unit having a low electric field is at least a cable insulator than the electric field applied in the axial direction of the second processing unit. Therefore, the outer peripheral portion of the cable insulator is completed by roughing, for example, and the surface treatment of the cable insulator using conventional sandpaper or the like is completed. Therefore, the labor required for cable processing can be greatly reduced as compared with the conventional cable terminal connection portion.
- Partial sectional view of a conventional cable termination connection The partial sectional view of the cable termination connection part in one example of the present invention Explanatory drawing which shows the process condition of the outer peripheral part of the cable insulator in this invention Partial sectional drawing which shows one Example of the rubber stress cone in this invention Explanatory drawing which shows the mounting condition to the cable insulator of the rubber stress cone in this invention Electric field analysis diagram of cable termination connection in one embodiment of the present invention
- FIG. 2 is a partial cross-sectional view of the cable termination connection portion of the present invention suitable for an air termination connection portion of a 275 kV CV cable
- FIG. 3 shows a processing state of the outer peripheral portion of the cable insulator in the present invention.
- the cable termination connection portion of the present invention includes a cable terminal 2 in which an end portion of the CV cable 1 is stepped, and a distal end portion of an outer semiconductive layer 13 ′ described later on the outer periphery of the cable insulator 12.
- a rubber stress cone 3 mounted across the (high-pressure side), and a soot pipe 5 made of a porcelain soot pipe or the like surrounding the cable terminal 2 and the rubber stress cone 3 and filled with an insulating fluid 4 made of insulating oil. I have.
- the cable termination connection section having such a configuration is assembled as follows.
- the CV cable 1 has a cable shielding layer 14 formed of a cable inner semiconductive layer (not shown), a cable insulator 12, a cable outer semiconductive layer 13, an aluminum corrugated sheath, and a vinyl chloride sheath on the cable conductor 11 in sequence.
- the cable sheath 15 which consists of is comprised.
- the cable inner semiconductive layer, the cable insulator 12 and the cable outer semiconductive layer 13 are usually formed by extrusion coating of three layers simultaneously.
- the end portion of the CV cable 1 having such a configuration is stepped, so that the cable shielding layer 14, the cable external semiconductive layer 13, the cable insulator 12, and the cable conductor 11 are sequentially exposed.
- the outer peripheral portion of the cable insulator 12 exposed in this way is connected to the first processing portion L1 on the rear end side (lower side in the drawing), as shown in FIG.
- the cable processing is performed by being divided into a second processing portion L2 on the distal end side (upper side in the drawing) and a tapered portion 16 provided between the first processing portion L1 and the second processing portion L2.
- the outer peripheral portion of the cable insulator 12 includes a first processing portion L1 to which the rubber stress cone 3 is attached, and a distal end side (second side) from the distal end portion (high pressure side) of the first processing portion L1.
- Tapered taper portion 16 that is smoothly reduced in diameter toward the processing portion L2 side, and a second processing portion that extends from the distal end portion (high-pressure side) of the tapered portion 16 to the distal end portion (high-pressure side) of the cable insulator 12. It is divided into L2.
- predetermined surface treatment that is, “electrical characteristics necessary for the interface between the rubber stress cone 3 and the cable insulator 12 can be obtained.
- Surface treatment “electrical characteristics necessary for the interface between the rubber stress cone 3 and the cable insulator 12”.
- the first processing portion L1 is mirror-finished by polishing with glass shaving or sandpaper. When applied to a class with a low voltage, for example, it is only necessary to finish with sandpaper and not to have a mirror finish.
- the outer diameter of the first processing portion L1 is made larger than the inner diameter of the rubber stress cone 3 described later.
- the diameter difference between the outer diameter of the first processing portion L1 and the inner diameter of the insertion hole of the rubber stress cone 3 is at least about 2 mm, and the cable difference is set to at least about 2 mm.
- the adhesion of the interface between the outer periphery of 12 and the inner periphery of the insertion hole of the rubber stress cone 3 can be improved.
- the cable insulator 12 corresponding to the second processing part L2 is as follows.
- the outer peripheral portion of the rubber can be made thinner than the inner diameter of the rubber stress cone 3 by roughing, for example.
- the electric field applied in the radial direction of the cable insulator 12 corresponding to the second processing portion L2 is V 1 (kV / mm), and the electric field applied in the axial direction (creeping direction) of the second processing portion is V 2 ( kV / mm), if V 1 > V 2 , the electric field applied to the cable insulator 12 corresponding to the second processing part L2 is low, so that the cable insulation corresponding to the second processing part L2 Even if the outer diameter of the body 12 is made smaller than the inner diameter of the stress cone, that is, even if the outer diameter is made thinner than a prescribed thickness, no electrical problem will occur. This point will be described later with reference to FIG.
- the cable insulator 12 corresponding to the second processing portion L2 is scraped off by, for example, a dedicated stripping tool (not shown), so that the outer diameter of the cable insulator 12 is made thinner than the inner diameter of the rubber stress cone 3. Can do.
- the cable insulator 12 corresponding to the second processing portion L2 may be in a state in which the outer peripheral portion of the cable insulator 12 is roughly cut by machining (machining), in a state where irregularities are formed on the outer surface, or in an elliptical shape.
- machining machining
- the taper part 16 is provided between the 1st process part L1 of the cable insulator 12, and the 2nd process part L2, and the outer surface of the said taper part 16 is also the above-mentioned 1st process part L1.
- predetermined surface treatment that is, “surface treatment for obtaining necessary electrical characteristics at the interface between the rubber stress cone 3 and the cable insulator 12” is performed.
- the external semiconductive layer 13 ′ necessary for assembly is formed. That is, the “predetermined process” is “to form the external semiconductive layer 13 ′ necessary for assembling the rubber stress cone 3”.
- a stepped cable insulator is formed at the tip (high voltage side) of the cable external semiconductive layer 13 in order to eliminate the step between the cable external semiconductive layer 13 and the cable insulator 12. 12 and a molded semiconductive layer 17 processed by winding a semiconductive self-bonding tape (ACP tape or the like) so as to straddle the tip of the cable outer semiconductive layer 13 and rubber.
- An external semiconductive layer 13 'necessary for assembling the stress cone 3 is formed.
- only the external cable semiconductive layer 13 that has been stripped without winding a semiconductive self-adhesive tape is used.
- a semiconductive layer 13 ′ may be formed.
- reference numeral 18 is a seat provided on the outer periphery of the cable shielding layer 14, 19 is a ground wire, 20 is a conductor terminal attached to the tip of the cable conductor 11, 21 is an upper fitting, and 22 is a bottom fitting.
- 23 is a cylindrical metal adapter that is airtightly attached to the upper surface of the bottom metal fitting 22, 24 is a lower copper tube, 25 is a corrosion protection layer provided between the cable sheath and the lower copper tube 24, and 26 is a bolt.
- 27 are supporting insulators, and 28 is a frame.
- FIG. 4 shows a cross-sectional view of a fitting-integrated stress cone as an embodiment of the rubber stress cone 3 according to the present invention.
- parts common to those in FIGS. 2 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the metal fitting-integrated stress cone according to the present invention has a distal end portion (high voltage side, upper side in the drawing) of the outer semiconductive layer 13 ′ on the outer periphery of the first processing portion L ⁇ b> 1 of the cable insulator 12. ) And a metal fitting 32 that surrounds the outer semiconductive layer 13 ′ and is integrally provided on the low pressure side of the stress cone body 31. It has a cylindrical shape. In this embodiment, the overall length of the bracket-integrated stress cone is about 405 mm, the outer diameter of the stress cone body 31 is about 180 mm, and the inner diameter of the insertion hole 33 provided at the center of the stress cone body 31 is about 64 mm. Yes.
- the stress cone main body 31 includes a cylindrical semi-conductor portion 34 made of a rubber-like elastic body such as silicone rubber disposed on the rear end side (low-pressure side, lower side in the figure), and the front end side of the semi-conductor portion 34.
- a cylindrical insulator portion 35 made of a rubber-like elastic body such as silicone rubber whose rear end portion (lower side in the drawing) is concentrically connected to the semi-conductor portion 34 on the upper side in the drawing, and an insulator And a cylindrical insulating protective layer 36 made of a rubber-like elastic body such as silicone rubber and provided integrally with the outer periphery of the semi-conductor part 34.
- the part 34, the insulator part 35, and the insulating protective layer 36 are integrated with a metal fitting 32, which will be described later, by molding.
- the tip of the semiconductive portion 34 has a bell mouth shape that gradually increases in diameter from the inner peripheral portion (rising portion) near the tip of the semiconductive portion 34 toward the outer peripheral portion of the distal end portion of the insulator portion 35.
- An electric field relaxation portion 37 having a curved interface is provided, and a cylindrical semiconductive skirt portion 38 is concentric with the semiconductive portion 34 toward the rear end side at the outer peripheral edge portion of the rear end portion. It protrudes in a shape.
- the semiconductive body portion 34 and the semiconductive skirt portion 38 are integrally formed.
- the length of the semiconductive portion 34 including the semiconductive skirt portion 38 is about 180 mm and the outer diameter is about 156 mm, of which the semiconductive skirt portion 38 has an axial length of about 40 mm. It is said that.
- the stress cone main body 31 has a thickness that allows a sufficient tightening force to act on the interface between the cable insulator 12 and the cable external semiconductive layer 13. Yes.
- a cone-shaped outer surface 39 that is gradually reduced in diameter toward the tip is provided on the outer periphery of the tip of the insulator 35, and the inner periphery of the high-pressure end is near the high-pressure end.
- a tulip-like recessed portion 40 having an inner surface that gradually increases in diameter from the high pressure side end portion is provided concentrically with the insulator portion 35. Providing such a recessed portion 40 prevents electric field concentration at the insulating fluid 4 at the distal end portion of the stress cone body 31, the insulator portion 35 of the stress cone body 31, and the triple junction (triple junction) P of the cable insulator 12. be able to.
- the depth of the recessed portion 40 is about 60 mm
- the diameter of the small diameter portion of the recessed portion 40 is about 80 mm
- the diameter of the large diameter portion is about 120 mm.
- a cylindrical insulating skirt portion 41 protrudes concentrically with the insulating protective layer 36 toward the rear end side at the rear end portion of the insulating protective layer 36.
- the insulating protective layer 36 and the cylindrical insulating skirt portion 41 are integrally formed.
- the insulating skirt portion 41 is integrally provided on the outer periphery of the semiconductive skirt portion 38, and the rear end portion of the insulating skirt portion 41 extends further toward the rear end side than the rear end portion of the semiconductive skirt portion 38.
- An annular protrusion 32e is provided on the inner periphery of the extended low side end portion of the insulating skirt portion 41.
- the length of the insulating skirt portion 41 in the axial direction is about twice that of the semiconductive skirt portion 38.
- the thickness of the insulating skirt portion 41 is about twice the thickness of the semiconductive skirt portion 38. Further, the outer diameter of the insulator 35 including the insulating protective layer 36 including the insulating skirt 41 is about 180 mm, and the axial length including the insulating protective layer 36 including the insulating skirt 41 is about 370 mm. Has been.
- the metal fitting 32 has a first cylindrical portion 32a whose outer peripheral portion is in close contact with the inner peripheral portion of the semiconductive skirt portion 38, and a concentric continuous connection on the rear end side of the first cylindrical portion 32a.
- a second cylindrical portion 32b that is in close contact with the inner peripheral portion of the portion 41, and a third cylindrical portion that is concentrically connected to the rear end side of the second cylindrical portion 32b and has a flange 32c on the outer periphery of the rear end portion.
- 32d, and the inner peripheral surfaces of the first cylindrical portion 32a, the second cylindrical portion 32b, and the third cylindrical portion 32d are flush with each other.
- the outer diameter of the first cylindrical portion 32a is smaller than the outer diameter of the second cylindrical portion 32b, and an annular concave groove that engages with the annular protrusion 32e at the rear end portion of the second cylindrical portion 32b. 32f is provided.
- the metal fitting 32 is made of aluminum, the outer diameter of the flange 32c is about 195 mm, and the inner diameter of the metal fitting 32 is about 136 mm.
- the bracket-integrated stress cone including the stress cone body 31 and the bracket 32 is formed as follows. First, the semiconductive rubber portion of the stress cone main body 31, that is, the semiconductive portion 34 and the semiconductive skirt portion 38, is molded (molded), and the semiconductive rubber portion (semiconductive portion formed) is molded. 34 and the semiconductive skirt portion 38) are fitted into the metal fitting 32. In this case, the inner peripheral part of the semiconductive skirt part 38 is brought into contact with the outer peripheral part of the first cylindrical part 32a.
- the integrated semiconductive rubber portion (semiconductor portion 34 and semiconductive skirt portion 38) and the metal fitting 32 are set in a mold, and the insulating rubber portion of the stress cone main body 31, that is, the insulating portion 35, the insulating portion.
- the protective layer 36 and the insulating skirt portion 41 are molded (molded).
- a bracket-integrated stress cone in which the bracket 32 is integrally provided on the low-pressure side of the stress cone body 31 is obtained.
- the outer peripheral portion of the first cylindrical portion 32a of the metal fitting 32 is the inner peripheral portion of the semiconductive skirt portion 38 of the stress cone main body 31, and the outer peripheral portion of the second cylindrical portion 32b of the metal fitting 32 is the stress cone main body.
- a metal fitting integrated type in which the protrusion 32e of the insulating skirt portion 41 of the stress cone main body 31 is fitted into the groove 32f of the second cylindrical portion 32b of the metal fitting 32.
- a stress cone is obtained.
- a lubricant such as silicone oil is applied to the outer surfaces of the first and second processing portions L1 and L2 of the cable insulator 12.
- a lubricant such as silicone oil is applied to the outer surfaces of the first and second processing portions L1 and L2 of the cable insulator 12.
- an annular bottom metal fitting 22 disposed in the vicinity of the end of the cable sheath 15 of the cable terminal 2 is fixed via a support insulator 27 and the like, and the outer semiconductive layer of the cable terminal 2
- a flange 23 a on the lower surface side (rear end surface side) of the cylindrical adapter 23 disposed so as to surround the outer periphery of 13 ′ is airtightly fixed to the upper surface side (front end surface side) of the bottom metal fitting 22.
- the bracket-integrated stress cone as the rubber stress cone 3 is placed on the outer periphery of the cable insulator 12 as the second processing portion L2 (at the high-voltage side). ), The fitting 32 of the fitting-integrated stress cone is inserted toward the adapter 23 (see FIG. 2).
- the outer diameter of the second processing portion L2 of the cable insulator 12 is formed to be narrower than the inner diameter of the stress cone body 31 constituting the bracket-integrated stress cone, when inserting the bracket-integrated stress cone, The stress cone main body 31 can be easily inserted through the outer peripheral portion of the second processing portion L2 of the cable insulator 12 without frictional resistance.
- the stress cone main body 31 When the stress cone body 31 reaches the tapered portion 16 and the distal end portion (high pressure side) of the first processing portion L1, the outer diameter of the first processing portion L1 is larger than the inner diameter of the stress cone body 31. Since it is formed, the stress cone main body 31 is slid to a predetermined position by the same method as the conventional method for attaching the rubber stress cone from the reaching position. As a result, the stress-contained stress cone is placed in a state where the inner peripheral portion of the stress cone main body 31 is in close contact with the outer peripheral portion of the first processing portion L1, that is, the outer peripheral portion of the first processing portion L1 and the stress cone main body 31. A predetermined surface pressure is applied between the insertion hole 33 (see FIG. 4) and the inner peripheral portion of the insertion hole 33 (see FIG. 4), and it can be mounted in a state where insulation at the interface is ensured.
- the lower surface side of the flange 32c of the fitting-integrated stress cone fitting 32 thus mounted is brought into contact with the upper surface side of the flange 23b of the adapter 23 via an O-ring (not shown), and a bolt (not shown). By fixing both, the seal part (oil stop part) is formed.
- the outer periphery of the cable terminal 2 is surrounded by the soot tube 5, the low-pressure side end portion is placed on the bottom metal fitting 22, and both are fixed by the bolts 26. Or the like.
- the upper metal fitting 21 is attached to the upper part of the soot tube 5, and the conductor terminal 20 on the cable terminal 2 side penetrates the upper metal fitting 21 and is electrically connected to the upper conductor 30.
- the anticorrosion layer 25 is formed at the rear end portion of the cable terminal 2, the assembly of the cable terminal connection portion is completed.
- the upper conductor 30 is connected to a high voltage conductor such as an overhead wire or a lead-in wire (not shown).
- FIG. 6 is an electric field analysis diagram showing the electric field strength (electric field stress) in the cable terminal connection portion together with the comparative example.
- FIG. 6A shows the outer diameter of the cable insulator 12 (the outer peripheral portion of the cable insulator) as a comparative example.
- FIG. 6B is an electric field analysis diagram in a state where the outer peripheral portion of the cable insulator is extremely shaved as another embodiment, specifically, a cable. The electric field analysis figure in the state which sharpened the outer peripheral part of the part corresponding to the 2nd process part L2 of the insulator 12 is shown.
- the length of the arrow line on the outer peripheral surface of the cable insulator 12 (the line parallel to the central axis on the outer side (right side in FIG. 6) pointing to the reference numeral 12) is the rubber stress. It can be seen that the vicinity where the cone 3 is disposed is long and gradually becomes shorter from the rubber stress cone 3 toward the tip. That is, it can be seen that the electric field on the outer peripheral surface of the cable insulator 12 is concentrated in the vicinity where the rubber stress cone 3 is disposed. Therefore, it can be seen that the portion of the cable insulator 12 corresponding to the second processing portion L2 has no electrical problem even if it is extremely thin.
- the outer peripheral part of the cable insulator 12 exposed by the stripping process of the edge part of the CV cable 1 is the 1st process part L1 with which the rubber stress cone 3 is mounted
- the predetermined surface treatment of the cable insulator 12 is sufficient to perform the predetermined surface treatment of the cable insulator 12 only on the first treatment portion L1 to which the rubber stress cone 3 is attached and preferably the taper portion 16, and therefore, compared with the conventional cable termination connection portion.
- the surface treatment range of the cable insulator 12 can be greatly reduced. Specifically, since about 80% of the processing length of the cable insulator 12 exposed by the stripping process can be processed by, for example, machining, a cable that takes a very long time as the surface treatment work of the cable insulator 12 The range of the predetermined surface treatment of the insulator 12 can be about 20%.
- a predetermined surface treatment may be performed on the first processing unit L1, and the second processing unit L2 may be machined, for example, the second processing unit L2 is in a machined state (cable Since the processing of the outer peripheral portion of the cable insulator 12 is completed in a state where the outer peripheral portion of the insulator 12 is roughened), a predetermined surface treatment such as mirror finishing of the cable insulator 12 by sandpaper or the like is unnecessary, and thus The labor required for cable processing can be greatly reduced as compared with the conventional cable terminal connection portion.
- the tapered taper portion 16 is provided between the first processing portion L1 and the second processing portion L2
- the rubber stress cone 3 is inserted into the cable insulator 12
- the rubber stress cone 3 can be reliably adhered to the outer periphery of the taper portion 16 without any gap, and as a result, generation of voids between the rubber stress cone 3 and the taper portion 16 after the adhesion can be eliminated.
- a metal-integrated stress cone is used as the rubber stress cone 3, but it is usually composed of a semiconductive portion and an insulator portion, and the entire shape is a spindle shape.
- a rubber stress cone having the structure (rubber stress cone having no metal fitting) may be used.
- the rubber stress cone 3 is formed of silicone rubber, but the rubber stress cone 3 may be formed of, for example, ethylene propylene rubber.
- the present invention is applied to an air termination connection portion.
- the present invention may be applied to a gas termination connection portion or an oil termination connection portion.
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Abstract
Description
2・・・ケーブル端末
3・・・ゴムストレスコーン
4・・・絶縁流体
5・・・碍管
12・・・ケーブル絶縁体
13・・・ケーブル外部半導電層
16・・・テーパ部
L1・・・第1の処理部
L2・・・第2の処理部
Claims (4)
- ケーブルの端部の段剥処理によりケーブル外部半導電層およびケーブル絶縁体が露出され当該ケーブル外部半導電層の先端側に所定の処理を施すことにより形成される外部半導電層を有するケーブル端末と、前記ケーブル絶縁体の外周に前記外部半導電層に跨って装着されるゴムストレスコーンと、前記ケーブル端末および前記ゴムストレスコーンを包囲し、内部に絶縁流体が充填される碍管とを備え、
前記ケーブル絶縁体の外周部は、前記ゴムストレスコーンが装着される第1の処理部と、前記第1の処理部の先端部から前記ケーブル絶縁体の先端部に至る第2の処理部とに区分され、
前記第1の処理部の外径は前記ゴムストレスコーンの内径よりも太くされ、
前記第2の処理部の外径は前記ゴムストレスコーンの内径よりも細くされ、かつ、前記第2の処理部における前記ケーブル絶縁体は、少なくとも前記第2の処理部の軸方向にかかる電界よりも前記ケーブル絶縁体の径方向にかかる電界が大きくなる厚さを有する、
ケーブル終端接続部。 - 前記第1の処理部と前記第2の処理部との間には前記第1の処理部側から前記第2の処理部側に向かって縮径するテーパ部が設けられている、
請求項1記載のケーブル終端接続部。 - 前記第1の処理部の外面には所定の表面処理が施されている、
請求項2記載のケーブル終端接続部。 - 前記テーパ部の外面には所定の表面処理が施されている、
請求項3記載のケーブル終端接続部。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020127031772A KR101766436B1 (ko) | 2010-06-07 | 2011-04-05 | 케이블 종단 접속부 |
CN201180027871.7A CN102934307B (zh) | 2010-06-07 | 2011-04-05 | 电缆终端连接组件 |
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JP2010-130139 | 2010-06-07 | ||
JP2010130139A JP5220804B2 (ja) | 2010-06-07 | 2010-06-07 | ケーブル終端接続部 |
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JP (1) | JP5220804B2 (ja) |
KR (1) | KR101766436B1 (ja) |
CN (1) | CN102934307B (ja) |
TW (1) | TWI530041B (ja) |
WO (1) | WO2011155110A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3190674A1 (en) * | 2016-01-11 | 2017-07-12 | Tyco Electronics (Shanghai) Co. Ltd. | Power cable terminal |
Families Citing this family (4)
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CN103869104A (zh) * | 2014-04-02 | 2014-06-18 | 上海华普电缆有限公司 | 10kV及以下电力电缆局部放电测试、耐压测试用应力环 |
KR102495310B1 (ko) * | 2015-12-29 | 2023-02-01 | 엘에스전선 주식회사 | 케이블 접속함용 윤활 조성물 |
KR101865851B1 (ko) * | 2016-10-07 | 2018-06-11 | 주식회사 평일 | 활선작업기구 |
KR20210083056A (ko) | 2019-12-26 | 2021-07-06 | 한국전력공사 | 활선 감지 기능을 갖는 특고압 케이블의 종단장치 |
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JPS57135613A (en) * | 1981-02-16 | 1982-08-21 | Hitachi Cable | Cable terminal connector |
JPH0297213A (ja) * | 1988-09-30 | 1990-04-09 | Tatsuta Electric Wire & Cable Co Ltd | ケーブルの課電劣化試験用端末及びケーブルの課電劣化試験方法 |
JP2000152453A (ja) * | 1998-11-12 | 2000-05-30 | Furukawa Electric Co Ltd:The | 電力ケーブルの端末処理方法 |
JP2003092814A (ja) * | 2001-09-20 | 2003-03-28 | Fujikura Ltd | Cvケーブルの終端接続部形成方法 |
JP2009100646A (ja) * | 2007-09-26 | 2009-05-07 | Swcc Showa Cable Systems Co Ltd | 金具一体型ストレスコーンおよびこれを用いたケーブル終端接続部 |
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JP5386811B2 (ja) * | 2007-10-05 | 2014-01-15 | 富士ゼロックス株式会社 | 光コネクタ |
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2010
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2011
- 2011-04-05 CN CN201180027871.7A patent/CN102934307B/zh active Active
- 2011-04-05 KR KR1020127031772A patent/KR101766436B1/ko active IP Right Grant
- 2011-04-05 WO PCT/JP2011/002023 patent/WO2011155110A1/ja active Application Filing
- 2011-05-04 TW TW100115633A patent/TWI530041B/zh active
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JPS57135613A (en) * | 1981-02-16 | 1982-08-21 | Hitachi Cable | Cable terminal connector |
JPH0297213A (ja) * | 1988-09-30 | 1990-04-09 | Tatsuta Electric Wire & Cable Co Ltd | ケーブルの課電劣化試験用端末及びケーブルの課電劣化試験方法 |
JP2000152453A (ja) * | 1998-11-12 | 2000-05-30 | Furukawa Electric Co Ltd:The | 電力ケーブルの端末処理方法 |
JP2003092814A (ja) * | 2001-09-20 | 2003-03-28 | Fujikura Ltd | Cvケーブルの終端接続部形成方法 |
JP2009100646A (ja) * | 2007-09-26 | 2009-05-07 | Swcc Showa Cable Systems Co Ltd | 金具一体型ストレスコーンおよびこれを用いたケーブル終端接続部 |
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EP3190674A1 (en) * | 2016-01-11 | 2017-07-12 | Tyco Electronics (Shanghai) Co. Ltd. | Power cable terminal |
Also Published As
Publication number | Publication date |
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KR20130090323A (ko) | 2013-08-13 |
TW201223047A (en) | 2012-06-01 |
JP5220804B2 (ja) | 2013-06-26 |
CN102934307A (zh) | 2013-02-13 |
CN102934307B (zh) | 2016-06-08 |
KR101766436B1 (ko) | 2017-08-08 |
JP2011259558A (ja) | 2011-12-22 |
TWI530041B (zh) | 2016-04-11 |
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