CN102831974A - Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable - Google Patents
Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable Download PDFInfo
- Publication number
- CN102831974A CN102831974A CN 201110157783 CN201110157783A CN102831974A CN 102831974 A CN102831974 A CN 102831974A CN 201110157783 CN201110157783 CN 201110157783 CN 201110157783 A CN201110157783 A CN 201110157783A CN 102831974 A CN102831974 A CN 102831974A
- Authority
- CN
- China
- Prior art keywords
- cable
- voltage cable
- shield
- conductor
- midium voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Insulated Conductors (AREA)
Abstract
The invention discloses an overcurrent type cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable with long service life and high safety. The medium voltage cable comprises one or three cable cores, a filler yarn (6), a wrapping tape (7) and an outer sheath (8), wherein each cable core comprises a conductor (1) which is used for wrapping an inner shield (2), an insulation layer (3), an outer shield (4) and a copper strip shield (5) sequentially from inward to outward; the conductor, the inner shield, the insulation layer, the outer shield and the copper strip shield form the cable core; the filler yarn (6) is arranged between the cable cores; the wrapping tape (7) is used for wrapping all the cable cores and the filler yarn; and the outer sheath (8) is used for wrapping the wrapping tape. According to the invention, the service life of the cable is prolonged, the fault rate of the cable is deceased, the current conducting capacity of the cable is improved, and short-circuit accidents caused by electric heating breakdown due to overcurrent or overvoltage of the cable resulted from large current of a circuit are reduced.
Description
Technical field
The invention belongs to field of cables, the crosslinked polyetylene insulated pvc sheath midium voltage cable of high safe overload current type of particularly a kind of high life.
Background technology
At present, China is just greatly developing cross-linked polyethylene insulated cable, because cross-linked polyethylene insulated cable can increase useful life greatly.But under middle press strip spare; Under effect of electric field; Cause the gathering of space charge, it is serious that the insulating material medium conductivity is worsened, and finally causes the Electric Field Distribution of cable insulation to surpass the maximum electrical field intensity that cable running safety allows; Cause cable breakdown, thereby reduce the useful life of cable.In addition, too much in the local or extraneous overcurrent that thunderstorm is many, can cause that cable overcurrent insulation breakdown causes cable fault.
Summary of the invention
The purpose that the present invention will solve is the deficiency that overcomes prior art, provides high safe overload current type of a kind of high life crosslinked polyetylene insulated pvc sheath midium voltage cable, to improve cable useful life, increases the overvoltage and the overcurrent capability of cable.
The object of the invention is realized through following technical scheme:
The crosslinked polyetylene insulated pvc sheath midium voltage cable of high safe overload current type of a kind of high life, it
(a) comprise 1 or 3 cable cores; Cable core comprises a conductor (1); Conductor (1) wraps up inner shield (2), insulating barrier (3), external shield (4) and copper strips shielding (5) from the inside to surface successively, and conductor (1), inner shield (2), insulating barrier (3), external shield (4) and copper strips shielding (5) constitute cable core;
(b) also comprise the gasket for packing (6) that is placed between cable core;
(c) and the oversheath (8) that comprises the band (7) that is wrapped in all cable cores and gasket for packing (6) and parcel band.
Wherein, described conductor (1), inner shield (2), external shield (4), gasket for packing (6), band (7), oversheath (8) all are the routines that adopts this area.
The used material of described insulating barrier (3) is a crosslinked polyethylene.Described crosslinked polyetylene insulated part material screens material through the space charge test after grinding modification through nanometer technology, selects and can effectively suppress cross-linking polyethylene materials that space charge gathers as cable insulation.
Described insulating barrier (3) average thickness 4.5+0.3mm, the insulation thickness thinnest part is not less than 4.5mm.Said crosslinked polyetylene insulated (3) eccentricity is less than 6%.
Described copper strips shielding (5) used material is a red copper, and that copper belt thickness is preferable is 0.15mm, and the copper strips rate of putting up is not less than 20%.
The used material of described oversheath (8) is polyvinyl chloride preferably.
The method for preparing cable according to the invention is the conventional method of this area.
The used raw material of the present invention except that specifying, all commercially available getting.
Than prior art; Beneficial effect of the present invention is following: owing to adopted technical scheme of the present invention; Inner shield, the insulating barrier of cable conductor, parcel cable conductor, external shield, copper strips shielding are placed in the gasket for packing between cable core, and the band of parcel cable, and oversheath.Combine the advantage of various existing cables, compare, improved the useful life of cable, reduce the failure rate of cable and reduced user's use cost with common crosslinked polyetylene insulated pvc sheath midium voltage cable; Improve the ability of cable conductor electric current, reduce the cable overcurrent or the overvoltage that rise owing to the circuit high-current leading and cause that electric heating punctures the short circuit accident that causes.
Description of drawings
Fig. 1 is a cross-sectional structure sketch map of the present invention.
Among the figure: 1, conductor; 2, inner shield; 3, insulating barrier; 4, external shield; 5, copper strips shielding; 6, gasket for packing; 7, band; 8, oversheath.
Embodiment
See also Fig. 1; The crosslinked polyetylene insulated pvc sheath midium voltage cable of high safe overload current type of high life of the present invention; Comprise 1 or 3 cable cores; Comprise a conductor 1 in the every cable core, conductor 1 wraps up inner shield 2, insulating barrier 3, external shield 4 and copper strips shielding 5 from the inside to surface successively.Also comprise the gasket for packing 6 that is placed between cable core, and comprise band 7 that is wrapped in all cable cores and gasket for packing 6 and the oversheath 8 that wraps up band 7.
Wherein insulating barrier 3 screens material through space charge test after by the crosslinked polyethylene insulation material modification, selects and can effectively suppress cross-linking polyethylene materials that space charge gathers as cable insulation.
Wherein should can effectively suppress cross-linking polyethylene materials that space charge gathers as cable insulation by through space charge test material being screened after the crosslinked polyethylene insulation material modification, selecting as insulation 3; Crosslinked polyetylene insulated average thickness 4.5+0.3mm, the thickness thinnest part can not be less than 4.5mm; Crosslinked polyetylene insulated eccentricity is less than 6%.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not to be used as qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.
Claims (6)
1. the crosslinked polyetylene insulated pvc sheath midium voltage cable of high safe overload current type of high life, it
(a) comprise 1 or 3 cable cores; Cable core comprises a conductor (1); Conductor (1) wraps up inner shield (2), insulating barrier (3), external shield (4) and copper strips shielding (5) from the inside to surface successively, and conductor, inner shield, insulating barrier, external shield and copper strips shielding constitute cable core;
(b) also comprise the gasket for packing (6) that is placed between cable core;
(c) and comprise the oversheath (8) that is wrapped in all cable cores and the band of gasket for packing (7) and parcel band.
2. midium voltage cable as claimed in claim 1 is characterized in that, the used material of described insulating barrier (3) is a crosslinked polyethylene.
3. midium voltage cable as claimed in claim 2 is characterized in that, the average thickness 4.5+0.3mm of described insulating barrier (3), and the insulation thickness thinnest part is not less than 4.5mm.
4. midium voltage cable as claimed in claim 2 is characterized in that, the eccentricity of said crosslinked polyetylene insulated layer (3) is less than 6%.
5. midium voltage cable as claimed in claim 1 is characterized in that, described copper strips shielding (5) used material is a red copper, and copper belt thickness is 0.15mm, and the copper strips rate of putting up is not less than 20%.
6. midium voltage cable as claimed in claim 1 is characterized in that, the used material of described oversheath (8) is a polyvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110157783 CN102831974A (en) | 2011-06-13 | 2011-06-13 | Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110157783 CN102831974A (en) | 2011-06-13 | 2011-06-13 | Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102831974A true CN102831974A (en) | 2012-12-19 |
Family
ID=47335063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110157783 Pending CN102831974A (en) | 2011-06-13 | 2011-06-13 | Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102831974A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699861A (en) * | 2016-01-21 | 2016-06-22 | 国网山西省电力公司晋城供电公司 | Aging test method for insulating part of middle and low voltage |
-
2011
- 2011-06-13 CN CN 201110157783 patent/CN102831974A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699861A (en) * | 2016-01-21 | 2016-06-22 | 国网山西省电力公司晋城供电公司 | Aging test method for insulating part of middle and low voltage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104269218A (en) | Water-tree-prevention ultrahigh-voltage cross linked polyethylene insulating power cable | |
| CN209000625U (en) | A kind of single environmental protection medium-pressure power cable | |
| CN101441906B (en) | High voltage, ultra-high voltage crosslinked polyetylene insulated power cable with non-linear shielding layer | |
| CN101436449A (en) | High voltage, ultra-high voltage crosslinked polyetylene insulated power cable with non-linear insulating layer | |
| CN202258530U (en) | Electric railway 27.5kV single-phase alternating current power cable | |
| RU180985U1 (en) | Shielded power cable | |
| CN202632868U (en) | Medium-voltage power cable with uniformly-packaged armoring metal wire shielding layer | |
| RU99895U1 (en) | POWER HIGH VOLTAGE ARMORED AC CABLE WITH SEPARATELY SCREENED CONDUCTORS | |
| EP2682952A1 (en) | Electrical cable | |
| CN201594405U (en) | Movable high-capacity rubber jacketed flexible cable with rated voltage of 8.7/10kV for coal mine | |
| CN102831974A (en) | Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable | |
| CN205582537U (en) | Novel high waterproof high tension cable | |
| RU158299U1 (en) | THREE-PHASE POWER CABLE WITH A GENERAL METAL SCREEN | |
| CN203631168U (en) | Graphene composite highly-semi-conductive nylon-belt-coated shielded power cable | |
| CN205789263U (en) | A kind of high voltage power cable | |
| CN203300285U (en) | Water-tree-retardant cross-linked cable | |
| CN102831975A (en) | Copper-strip-shielded type cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable | |
| CN203377024U (en) | Crosslinking polyethylene-insulated power cable | |
| CN202549411U (en) | Shielded cable for computer | |
| CN202855337U (en) | Mobile rubber flexible cable for coal mine | |
| CN207489569U (en) | The crosslinked polyetylene insulated medium-pressure power cable of high security Bimetallic shielding | |
| CN202930124U (en) | Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding | |
| CN204066815U (en) | A kind of instrument cable of resistance to nuclear radiation | |
| CN102956292A (en) | Instrument cable for nuclear power station | |
| CN203325511U (en) | Crosslinking polyethylene-insulated power cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121219 |