CN204010791U - Concentric type conductor aluminium alloy cable - Google Patents
Concentric type conductor aluminium alloy cable Download PDFInfo
- Publication number
- CN204010791U CN204010791U CN201420380864.6U CN201420380864U CN204010791U CN 204010791 U CN204010791 U CN 204010791U CN 201420380864 U CN201420380864 U CN 201420380864U CN 204010791 U CN204010791 U CN 204010791U
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- China
- Prior art keywords
- cable
- core
- aluminium alloy
- master
- type conductor
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Abstract
The utility model belongs to electric power transportation technology field, proposes a kind of concentric type conductor aluminium alloy cable.The concentric type conductor aluminium alloy cable proposing includes master core and ground core; Master core includes by 8030 aluminium alloy single lines and presses the cable conductor (1) forming and be extruded in the insulating barrier (2) outside cable conductor (1) through stranded; Master core is locus is symmetrical and structure is identical three; Three stranded being integrated of master core stranding; Packed layer (3) is set in the space between three master cores; Three master cores and between three described master cores the outside wrapping lining-layer (4) of packed layer (3) in space, form the cable core of a rounding; The outside of cable core dredge be wound with by 8030 aluminium alloy single wire-wound systems form and with the concentric type conductor (5) of the concentric setting of cable core.The utility model greatly reduces the uneven generation mutually of threephase load electromagnetic interference, and has improved safety in operation and the reliability of cable.
Description
Technical field
The utility model belongs to electric power transportation technology field, is specifically related to a kind of concentric type conductor aluminium alloy cable.
Background technology
Conventionally there is no concentric type conductor when China's lv power cable product structure design, Fig. 2 provides the structural representation of aluminium cable in prior art, aluminium cable includes four cores that are positioned at same circumference, wherein the structure of three cores is identical, as three phase lines of aluminium cable, the 4th ground wire as aluminium cable; Owing to failing to distinguish well concrete condition and the field of employment of engineering, in the transmission and distribution circuit of three-phase system, use this conventional plastic insulating power cable can bring the problem of many deficiencies to engineering design, transmission and distribution network operation, mainly have following three shortcomings:
1, interference free performance is poor.In the time containing higher harmonic components in the electric current that cable itself is carried, cable can produce electromagnetic interference to its electronic equipment around; Otherwise extraneous electromagnetic interference also can be coupled on cable core, to the various electric generation electromagnetic interference of joining with cable.
2, phase-zero short-circuit impedance is large, and circuit single-phase short circuit current value is reduced, and affects the sensitivity of head end protective device in the time of single-phase short circuit.It is to be noted especially: in the connecting to neutral system of power supply neutral-point solid ground; when cable one insulate mutually breakdown and occur a phase ground connection time; because of its earth short circuit current value very little; deficiency, so that the overcurrent protective device of circuit head end effectively moves, causes jeopardizing electric equipment and the personal safety of whole system.
3,, along the cable laying in skyscraper, because of unshielded layer, under the galvanomagnetic effect effect of powerful lightning current, produce overvoltage unavoidably, and cause the damage of insulating barrier or breakdown.Due to this body structure of lv power cable existing problems, and then the various interference that cause and harm problem, increasingly sophisticated and serious.In the cable type selecting of power station, power plant, skyscraper, tunnel, subway, computer room and operation are laid, have to problem to be paid attention to, and the same core formula conductor with shielding properties and neutral line effect seems even more important and applicable in these places.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to propose a kind of concentric type conductor aluminium alloy cable.
The utility model adopts following technical scheme for completing above-mentioned purpose:
A kind of concentric type conductor aluminium alloy cable, described concentric type conductor aluminium alloy cable includes master core and ground core; Described master core includes by 8030 aluminium alloy single lines and presses the cable conductor forming and be extruded in the insulating barrier outside cable conductor through stranded; Described master core is locus is symmetrical and structure is identical three; Stranded being integrated of master core stranding described in three; In space between three described master cores, packed layer is set; Master core described in three and between three described master cores the outside wrapping lining-layer of packed layer in space, form the cable core of a rounding; The outside of described cable core dredge be wound with by 8030 aluminium alloy single wire-wound systems form and with the concentric type conductor of the described concentric setting of cable core; Described concentric type conductor forms described ground core; The outside of described concentric type conductor is surrounded with tightens band; Described outside of tightening band is surrounded with restrictive coating.
Described insulating barrier is extruded in cable conductor skin by ambroin and forms, and ambroin can be polyethylene, polyvinyl chloride, crosslinked polyethylene or other customary insulation plastics.
Described packed layer is made up of polypropylene tearing film.
Described inner covering forms by polyvinyl chloride band is wrapped.
The described band of tightening forms by nonwoven fabrics is wrapped.
Described restrictive coating is extruded and is formed by polyvinyl chloride.
A kind of concentric type conductor aluminium alloy cable the utility model proposes, adopt technique scheme, because arrange symmetrically three master core locus of cable, cable threephase load core has formed balanced, symmetrical structure, make each core AC resistance equality, greatly reduce the uneven electromagnetic interference that mutually produces of threephase load, the impedance of each core positive-negative sequence is all close to zero, reduced mutual electromagnetic interference, thereby antijamming capability is strong; Also make the external diameter of cable reduce, weight saving; Because cable conductor adopts 8030 aluminium alloys, the thermal creep performance that makes this cable compare conventional aluminium core cable conductor is greatly improved, thereby has significantly improved safety in operation and the reliability of cable; The in the situation that of identical ampacity, cheap more a lot of than copper core cable again.
Brief description of the drawings
Fig. 1 the utility model structural representation.
Fig. 2 is the structural representation of aluminium cable in prior art.
In figure: 1, cable conductor, 2, insulating barrier, 3, packed layer, 4, inner covering, 5, concentric type conductor, 6, tighten band, 7, oversheath.
Embodiment
With specific embodiment, the utility model is illustrated by reference to the accompanying drawings:
As shown in Figure 1, a kind of concentric type conductor aluminium alloy cable, described concentric type conductor aluminium alloy cable includes master core and ground core; Described master core includes by 8030 aluminium alloy single lines and presses the cable conductor 1 forming and be extruded in the insulating barrier 2 outside cable conductor 1 through stranded; Described master core is locus is symmetrical and structure is identical three; Stranded being integrated of master core stranding described in three; In space between three described master cores, packed layer 3 is set; Master core described in three and between three described master cores the outside wrapping lining-layer 4 of packed layer 3 in space, form the cable core of a rounding; The outside of described cable core dredge be wound with by 8030 aluminium alloy single wire-wound systems form and with the concentric type conductor 5 of the described concentric setting of cable core; Described concentric type conductor 5 forms described ground core; The outside of described concentric type conductor 5 is surrounded with tightens band 6; Described outside of tightening band 6 is surrounded with restrictive coating 7.
Described packed layer 3 is made up of polypropylene tearing film.
Described inner covering 4 forms by polyvinyl chloride band is wrapped.
The described band 6 of tightening forms by nonwoven fabrics is wrapped, ensures that concentric type conductor 5 is not loose.
Described restrictive coating 7 is extruded and is formed by polyvinyl chloride, and cable is played to protective action.
Claims (1)
1. a concentric type conductor aluminium alloy cable, described concentric type conductor aluminium alloy cable includes master core and ground core; It is characterized in that: described master core includes by 8030 aluminium alloy single lines and presses the cable conductor (1) forming and be extruded in the insulating barrier (2) outside cable conductor (1) through stranded; Described master core is locus is symmetrical and structure is identical three; Stranded being integrated of master core stranding described in three; Packed layer (3) is set in the space between three described master cores; Master core described in three and between three described master cores the outside wrapping lining-layer (4) of packed layer (3) in space, form the cable core of a rounding; The outside of described cable core dredge be wound with by 8030 aluminium alloy single wire-wound systems form and with the concentric type conductor (5) of the described concentric setting of cable core; Described concentric type conductor (5) forms described ground core; The outside of described concentric type conductor (5) is surrounded with tightens band (6); Described outside of tightening band (6) is surrounded with restrictive coating (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420380864.6U CN204010791U (en) | 2014-07-11 | 2014-07-11 | Concentric type conductor aluminium alloy cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420380864.6U CN204010791U (en) | 2014-07-11 | 2014-07-11 | Concentric type conductor aluminium alloy cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204010791U true CN204010791U (en) | 2014-12-10 |
Family
ID=52050754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420380864.6U Expired - Fee Related CN204010791U (en) | 2014-07-11 | 2014-07-11 | Concentric type conductor aluminium alloy cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204010791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448861A (en) * | 2016-10-08 | 2017-02-22 | 远东电缆有限公司 | Ultralow magnetic field cable |
-
2014
- 2014-07-11 CN CN201420380864.6U patent/CN204010791U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448861A (en) * | 2016-10-08 | 2017-02-22 | 远东电缆有限公司 | Ultralow magnetic field cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20180711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |