CN201698820U - Crosslinked polyethylene insulation steel strip armored polyethylene sheath power cable - Google Patents
Crosslinked polyethylene insulation steel strip armored polyethylene sheath power cable Download PDFInfo
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- CN201698820U CN201698820U CN2010201603728U CN201020160372U CN201698820U CN 201698820 U CN201698820 U CN 201698820U CN 2010201603728 U CN2010201603728 U CN 2010201603728U CN 201020160372 U CN201020160372 U CN 201020160372U CN 201698820 U CN201698820 U CN 201698820U
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- voltage
- power cable
- steel strip
- core
- sheath
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Abstract
The utility model discloses a crosslinked polyethylene insulation steel strip armored polyethylene sheath power cable, which is applicable to 20 kV level. The power cable comprises a plurality of wire cores, each wire core is formed by sequentially arranging a conductor shielding layer, an insulation layer, an insulation shielding layer and a steel strip shielding layer outside a conductor, after the wire cores are cabled, packing materials are filled in spaces among the wire cores, and a band, an inner sheath, a steel strip armored layer and an outer sheath are sequentially arranged outside a cable core. The power cable can lead medium-voltage distribution network voltage to adopt 20kV voltage level, reduces voltage layers, lowers operation cost, and has obvious economic benefit by adopting 20 kV voltage as the medium-voltage distribution network voltage.
Description
Technical field
The utility model relates to power cable, specifically is a kind of crosslinking polyethylene insulated steel band armored pe sheath power cable.
Background technology
The electric pressure that China adopts at present mainly is 500/220/1 10/35/10/0.4kV, and 220/1 10/35/10/0.4kV or the power supply of 220/1 10/10/0.4kV electric pressure are mainly adopted in town and country.The 0.4kV low pressure that the user uses is to be depressured to 10kV by 110/10kV or 35/10kV transformer station earlier, by distribution transformer 10kv is dropped to 0.4kV voltage again.Because urban and rural economies increase fast, the power load surge, not only capacity is restricted to adopt the long distance of 10kV to power, and line loss is big, answers active research to adopt the 20/0.4kV electric pressure.Adopt the 20/0.4kV electric pressure not only can reduce the one-level loss on transmission, reduce line loss, improve power supply capacity, and the 20kV power supply at equal capacity, with equidistant, equal conductor cross-section situation under, reduce half than 10kv power voltage supply line loss.
20kV voltage and 10kV voltage ratio, under the situation of equal conductor cross-section and current density, when carrying identical electrical power, it rationally send electrical distance can increase nearly 1 times, the economic load square of circuit can increase about 4 times.Under the prerequisite that transmits identical distance and equal-wattage, the loss of voltage reduces by 50%, and energy loss reduces by 75%, can reduce transformer station's distribution outlet feeder number half, the difficulties such as channel path that can avoid outlet too much to bring to the intensive area of loading.Under the identical respectively condition of rated current and short circuit current, adopt 20kV voltage ratio 10kv voltage can enlarge 1 times of the capacity of transformer station, can make the quantity that step-down substation is set reduce half at areal.
The transmission power of 10kV circuit has only 300kW～2000kW, and general power supply distance is 8km～18km, and its economic radius of electricity supply only is 10km～12km when lotus density is 20kW/km～30kW/km, is less than 8km when surpassing 40kW/km～50kW/km.Though and rural area 10kV circuit is through the upgrading of rural power grids, mountain area, remote districts send electrical distance still far, and the voltage of peak of power consumption season, period is still very low, and line loss rate is too high.
The transmission power of 20kV circuit can reach 800kW～5000kW, general power supply distance is 15km～35km, when load density is 25kW/km2-35kW/km, its economic radius of electricity supply can reach 18km～20km, also can rationally carry 14km～15km in load density during up to 60kW/km2-70kW/km, even in load density up to hundreds of, even the city net of kW/km up to ten thousand and industrial intensive area, under equal conditions power supply distance can prolong 1 times than 10kv.
But because the lifting of electric pressure, the 20kV power cable can not adopt the structure of 10kV power cable, must improve it.
The utility model content
Technical problem to be solved in the utility model provides a kind of safe, effective, guarantees the crosslinking polyethylene insulated steel band armored pe sheath power cable that 20kV electric power is carried.
A kind of crosslinking polyethylene insulated steel band armored pe sheath power cable described in the utility model, it comprises the several wire core, described core is to set gradually conductor shield, insulating barrier, insulation screen, steel band screen outside conductor, behind the core stranding, space between core is filled with inserts, sets gradually band, inner sheath, steel-tape armouring layer and oversheath outside cable core.
Advantage of the present utility model:
The first, be press-fitted net voltage in and adopt the 20kV electric pressure, can reduce the voltage level, reduce operating cost; The second,, adopt 20kV voltage to have tangible economic benefit as medium voltage distribution network voltage according to the actual conditions of China's electrical network.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, crosslinking polyethylene insulated steel band armored pe sheath power cable described in the utility model, it mainly comprises the several wire core, described core is to set gradually conductor shield 2, insulating barrier 3, insulation screen 4, steel band screen 5 outside conductor 1, behind the core stranding, space between core is filled with inserts 6, sets gradually band 7, inner sheath 8, steel-tape armouring layer 9 and oversheath 10 outside cable core.
Claims (1)
1. crosslinking polyethylene insulated steel band armored pe sheath power cable, it is characterized in that comprising the several wire core, described core is to set gradually conductor shield (2), insulating barrier (3), insulation screen (4), steel band screen (5) outside conductor (1), behind the core stranding, space between core is filled with inserts (6), sets gradually band (7), inner sheath (8), steel-tape armouring layer (9) and oversheath (10) outside cable core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201603728U CN201698820U (en) | 2010-04-14 | 2010-04-14 | Crosslinked polyethylene insulation steel strip armored polyethylene sheath power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201603728U CN201698820U (en) | 2010-04-14 | 2010-04-14 | Crosslinked polyethylene insulation steel strip armored polyethylene sheath power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201698820U true CN201698820U (en) | 2011-01-05 |
Family
ID=43400067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201603728U Expired - Fee Related CN201698820U (en) | 2010-04-14 | 2010-04-14 | Crosslinked polyethylene insulation steel strip armored polyethylene sheath power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201698820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489528A (en) * | 2013-09-16 | 2014-01-01 | 无锡市长城电线电缆有限公司 | Crosslinked polyethylene insulating and water-blocking power cable |
| CN106373647A (en) * | 2016-10-12 | 2017-02-01 | 无锡市长城电线电缆有限公司 | Medium-voltage, fire-resistant and light flexible cable |
-
2010
- 2010-04-14 CN CN2010201603728U patent/CN201698820U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489528A (en) * | 2013-09-16 | 2014-01-01 | 无锡市长城电线电缆有限公司 | Crosslinked polyethylene insulating and water-blocking power cable |
| CN106373647A (en) * | 2016-10-12 | 2017-02-01 | 无锡市长城电线电缆有限公司 | Medium-voltage, fire-resistant and light flexible 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20170414 |