Basic Info.
Application
Construction, Underground, Industrial, Power Station
Voltage
Low and Medium Voltage Cable
Material Shape
Round Wire
Wire Core Material
Bare Copper Wire
Certification
ISO, CCC, CE, RoHS
Product Description
Technical Specification of 24kV Power Cable(ZC-YJV-12/20KV-1*70) - Scope of application
- The technical specification is organized and explained by Jiangsu Shuangdeng Power Technology Co., Ltd.
- The technical specification defines the standards followed by the supplier, cables' technical requirement, testing, packing and storage & transportation.
- All the power cables supplied by the supplier have passed the type test, and the products have been proved to be of good quality, safe and reliable by long-term practice.
- Applicable standard
In addition to conform to this technical specification, the cables should also comply to the related requirements of following standards: GB/T12706.2-2008 'Extruded insulation power cables with rated voltage 1kV - 35kV and accessories, Part 2: Cables with rated voltage 6kV(Um=7.2kV) to 30kV(Um=36kV)'GB/T3956-2008 'Cables' conductors'GB/T3953-2009 'Electrical round copper wires'IEC60228-2004 'Conductors of insulated cables'JB/T8137-1999 'Delivery drum of wire & cable'GB/T6995-1-2008 'Identification mark of wire & cable, Part 1: General regulation'GB/T8170-2008 'Said and judgment of the digital modification rules and limit value'GB/T50217-2007 'Engineering design specification of power cables'GB/T3048-2007 'Test method of electrical properties of power cables'GB/T2952 'Outer sheath of cables'GB4005 'Delivery drum of wire & cable'DL401 'Guidelines for the selection of high-voltage cables'IEC60183 'Guidelines for the selection of high-voltage cables'IEC60230 'Shock test of cables and accessories'IEC60060 'Technology of high voltage test' - Main parameters and performance
- System parameters
Operating condictionSystem nominal voltage U0/U .......... 12/20kVSystem maximum operating voltage Um ......... 24kVSystem frequency ........... 50HzSystem grounding mode ........... The neutral points not directly grounding system or Small resistance grounding or Arc-free grounding- Operating requirements
Rated operating temperature of cable conductor ......…..90ºCMax. temperature of cable conductor when short circuit .........250ºCShort-circuit time ........... Less than 5sBending radius of cable ......... Not less than 20D of cable's OD- Operating environment condition
Altitude .............. ≤1500mAmbient temperature ............ -40ºC~+90ºCRelative humidity .........….. ≤95%- Laying condition
Laying environment ...... Direct burial, Trench laying, Exhaust pipe laying, Channel laying, Bridge laying, etcMin. ambient temperature of laying ......… 0ºC- Seismic resistance
Seismic intensity ........ 7 (a=0.1g) - Technical condiction
- Conductor
- Conductor is made of twisted and pressed round copper wire, and the coefficient of compression is not less than 0.90. The components and performance accord to the regulation of GB/T3956.
- Conductor's surface should be bright and clean, greaseless, without burr and sharp edges which may damage screen and insulation, without raised and broken single lines.
- Conductor screen
- Conductor screen is made of extruded cross-linked type semi-conductive layer. The semi-conductive layer is uniformly coated on the conductor, with smooth surface, with no obvious stranded wire burr, no sharp corner, particle, and marks of burn and bruise.
- The nominal thickness of conductor screen is 0.6mm, and the min. thickness should not be less than 0.48mm.
- Insulation
- Insulation material is XLPE, which extruded on the conductor with totally closed dry chemical cross linking method (Craft: CCV). The insulation property can conform to the regulation of GB/T12706.3.
- The nominal thickness of insulation is 5.5mm, and the thinnest point should not be less than 90%-0.1mm of nominal value.
- Insulation screen
- Insulation screen is extruded semi-conductive layer, which uniformly coated on the surface of insulation. The insulation surface should be smooth, without sharp corner, particle, and marks of burn and bruise.
- Insulation screen is strippable, and the nominal thickness is 0.6mm, and the minimum thickness is not less than 0.48mm.
- There is mark tape (Yellow, Green, Red) along the longitudinal direction of cable cores between insulation screen and metallic screen. And the width of mark tape should not be less than 2mm.
- Metallic screen
Metallic screen is made of flexible copper tape overlapped and wrapped. The copper tapes are connected by welding, that satisfy the temperature requirement of short-circuit. The wrapping should be round and smooth, and the coverage rate should not be less than 5%. The copper tape's nominal thickness of single core cables should be not less than 0.12mm, and three-core cables not less than 0.10mm, with good connection for screen of three cores.- Coating layer
With non-hygroscopic tape lapped and wrapped out of insulated cable core, to make cable's shape round.- Outer sheath
- The outer sheath is made of extruded 90ºC PVC sheath material. The sheath surface is bright and clean, round. And the minimum thickness of any point should not be less than 85%-0.1mm of nominal value.
- The surface of outer sheath should be tight, and sand holes, impurities, bubbles and not good plasticizing and coking phenomenon should not be seen on the cross section.
- Cable mark
- The phase insulated cable core should be marked with red, yellow, green tapes.
- The continuous mark of manufacturer's name, product type and rate voltage should be printed on the sheath of finished cables. And the distance between two continuous marks should be less than 500mm. The marks should be clear writing, easy to identify and wear-resisting.
- Testing
- During the cable's production, dealing, testing and inspecting, the buyer has right of manufacture supervision and witness, and the seller cannot refuse that. And the buyer's right cannot release the seller's quality responsibility.
- Attached table
Cable's technical data sheetNo. | Item | Unit | Data |
1 | Manufacturer | | Shuangdeng |
2 | Specification | | ZC-YJV-12/20KV-1*70 |
3 | Standard | | GB/T12706.2-2008 |
4 | Working voltage | | |
U0 | kV | 12 |
U | kV | 20 |
Um | kV | 24 |
5 | Conductor | Material | | Copper wire |
Nominal cross section | mm2 | 70 |
6 | Conductor screen | Material | | Inner screen material |
Nominal thickness | mm | 0.6 |
7 | Insulation | Material | - | XLPE |
Nominal thickness | mm | 5.5 |
Thinnest point thickness | mm | 4.85 |
Approx insulation outer diameter | mm | 23 |
8 | Insulation screen | Material | | Outer screen material |
Nominal thickness | mm | 0.6 |
9 | Copper tape screen | Material | | Copper tape |
Thickness | mm | 0.12 |
10 | Wrapping tape | Material | | Non-woven fabric |
11 | Inner sheath | Material | - | / |
Nominal thickness | mm | / |
Thinnest point thickness | mm | / |
12 | Armor | Material | - | / |
Thickness | mm | / |
Outer diameter | mm | / |
13 | Outer sheath | Material | - | Flame retardant PVC |
Nominal thickness | mm | 1.8 |
Thinnest point thickness | mm | 1.43 |
Sheath outer diameter | mm | 27.4 |
14 | Reference value of cable weight | kg/mm | 1215.2 |
15 | Min. bending radius | mm | 20D |
16 | Max. DC resistance of conductor @ 20ºC | Ω/km | 0.268 |
17 | Power-frequency voltage-withstand test 5min | kV | 42 |
18 | Particle discharge test | pC | 10 |
19 | Reference current carrying capacity of cable | A | Laying in air | 260 |
Laying underground | 330 |
Product structure:1 - Conductor 2 - Inner screen 3 - Insulation 4 - Outer screen5 - Copper tape screen6 - Wrapping tape7 - Outer sheathWe '
Jiangsu Shuangdeng Power Technology Co., Ltd'
Founded in
1985, located in Taizhou, Jiangsu Province, and covering
180,000M2;
Now we have more than
500 employees totally, within
15% technical team;
We own first-class production and testing facilities of
200 more sets, with annual output of about
2 billion RMB.
Now we have main products as below: Power cables with voltage up to 35kV (Copper, Aluminum, Aluminum-alloy core), Photovoltaic cables (Solar cables), Submarine photoelectric composite cables, Aerial insulated cables, Computer control cables & Telecommunication cables, PVC wires,
pre-fabricated branch cables, Fire-proof cables, Flame-retardant & Fire-resistant cables, Pre-fabricated branched cables, Battery connecting cables, etc.
As a 'National New & High Technology Enterprise', we are also honored as a 'Heavy contract, Keeping promises' enterprise, 'Class AAA credit enterprise', etc. And our products are awarded as 'National quality tracking and key protection products'.
Besides, we can also design, develop and produce all kinds of products according to users' requirements, and provide whole set of solution.
After accumulation and development of 30 more years, our company has built a completed marketing service network. Our products are widely applied to all kinds of engineering projects with good reputation, such as State Grid Corporation, New energy, Rail traffic, Railway, Real Estate, Nuclear power, Chemical engineering, etc.
Now we are large supplying for a lot of key customers, such as:
Sincerely look forward to cooperating with you, to create a bright future.
Address:
Liangxu Town, Jiangyan Dist, Taizhou City, Jiangsu Province, China
Business Type:
Trading Company
Business Range:
Electrical & Electronics
Management System Certification:
ISO 9001, ISO 14001, OHSAS/ OHSMS 18001, ISO 10012
Company Introduction:
Founded in 1985
Our company is located in Taizhou, Jiangsu Province, and covering 180, 000. We own first-class production and testing facilities of 500 more sets, and our main products are power cables with voltage up to 35kV, pre-fabricated branch cables, new energy automotive cables, wind power cables, PV cables, nuclear power cables, aluminium alloy cables, fire-proof cables, submarine cables, computer cables, telecommunication cables, etc.
As a ′National New & High Technology Enterprise′, we are also honored as a ′heavy contract, keeping promises′ enterprise, ′Class AAA credit enterprise′, etc. And our products are awarded as ′National quality tracking and key protection products′. Besides, we can also design, develop and produce all kinds of products according to users′ requirements, and provide whole set of solution.
After accumulation and development of 30 more years, our company has built a completed marketing service network. Our products are widely applied to all kinds of engineering projects with good reputation, such as State Grid Corporation of China, new energy, rail traffic, railway, nuclear powder, chemical engineering, etc.
Sincerely look forward to cooperating with you, to create a bright future.