Our Product
1. Scope
The cables are manufactured and tested in accordance with IEC60502 Power Cables with Extruded Insulation and their accessories for rated voltages from 1kV(Um1.2 kV) up to 30kV(Um 36kV). Whereas, Greatwall Cable can supply XLPE insulation cables according to other recognized national and international standards or customized specification.
2. Construction and Material
1) Conductor
Conductors are normally class 2 of compacted cicular or circular standard conductors of copper or aluminium.
2) Conductor Screen
All cable of rated voltage above 1.8/3kV are supplied with conductor screening which is non-mentallic and consists of either semi-conducting tape or a layer of extruded semi-conducting compound,or a combination of the two.
3) Insulation
Insulation is a layer of extruded cross-linked polyethylene(XLPE).
4) Insulation Screen
For cable at rated voltage above 1.8/3kV ,insulation screening consists of a non-metallic semi-conducting part in combination with a metallic layer and consists of either semi-conducting tape or a layer of extruded semi-conducting compound.. The extruded insulation screen is normally free strippable(easy removable) type but can be provided with bonded one upon request.
The metallic part is normally applied on the individual cores for rated voltage above 1.8/3kV and on the core assembly for rated voltage 1.8/3kV and consists of plain annealed copper tape. or copper tape screen a layer of copper wire,a lead alloy or corrugated aluminum sheath can be provided upon request.
5) Inner Covering or Separation Sheath
(for armored cables)
A layer of PVC inner coveing is applied under the armor ,if there is no screen.
When the metallic screening and the armor are of different metals, an extruded separation sheath of PVC is provided in order to separate the different metals.
6) Metallic Armor
The armor, if required, consists of single layer of round wires or double tapes of galvanized steel or aluminum or other non-magnetic metals. Single core cables are normally armored with aluminum(other non-magnetic metals), because non-magnetic armor is essential for single core cable for use on A.C circuit .
7) Outer Sheath
All cable are normally provided with an extruded PVC out sheath, black colored(class ST2). Other materials can be available upon request,as PE , polyethylene,high flame or fire retardant PVC and etc.
8) Core Identification
The multiple conductors are identified as according IEC60502 .
3.Typical Drawing
4. Technical Parameter
Nominal Cross Sectional area of Conductor
mm2 |
Max.D.C. resistance of conductor at 20°C |
|
| |
copper |
aluminum |
| 1 |
18.1 |
|
| 1.5 |
12.1 |
|
| 2.5 |
7.41 |
|
| 4 |
4.61 |
|
| 6 |
3.08 |
|
| 10 |
1.83 |
3.08 |
| 16 |
1.15 |
1.91 |
| 25 |
0.727 |
1.20 |
| 35 |
0.524 |
0.868 |
| 50 |
0.387 |
0.641 |
| 70 |
0.268 |
0.443 |
| 95 |
0.193 |
0.320 |
| 120 |
0.153 |
0.253 |
| 150 |
0.124 |
0.206 |
| 185 |
0.0991 |
0.164 |
| 240 |
0.0754 |
0.125 |
| 300 |
0.0601 |
0.100 |
| 400 |
0.0470 |
0.0778 |
| 500 |
0.0366 |
0.0605 |
| 630 |
0.0283 |
0.0469 |
| 800 |
0.0221 |
0.0367 |
| Power frequency A.C. voltage test |
Test voltage 3.5kV/5min |
Current carrying rating factors for ambient air temperature
| Ambient air temperature |
20°C |
25°C |
30°C |
35°C |
40°C |
45°C |
| Rating factor |
1.23 |
1.17 |
1.12 |
1.06 |
1.00 |
0.94 |
Current carrying rating factors for different soil temperature:
| Soil temperature |
20°C |
25°C |
30°C |
35°C |
40°C |
| Rating factor |
1.04 |
1.0 |
0.96 |
0.92 |
0.87 |
5. Tests
The finished cables meet all the appropriate test requirments specified in IEC60502.
Our workshop
Our Lab
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Our performance
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FAQ
Q1: How can l get the price?
We usually quote within 24 hours after we get your inquiry (except weekend and holidays). lf you are urgent to get the price,please email us or contact us in other ways so that we can offer you a quote
Q2: Can l get samples?
We are honored to provide you with samples, samples are provided free of charge, but need to pay for express shipping. lf you have a courier account, you can send a courier to collect samples
Q3: If we place an order, when will it be delivered?
It depends on the order quantity. Under normal circumstances, we can ship small orders within 3-5 working days, if the quantity is large, we will confirm again when you officially place the order.
Q4: How do you make our business long-term and good relationship?
We keep good quality and competitive price to ensure our customers benefit. Furthermore, we respect every customer as ourfriend and we sincerely do business and make friends with them, no matter where they come from.
Q5: Do you accept OEM/ODM?
We support OEM/ODM service. please don't hesitate to tell us your thoughts.
Please feel free to leave your request, we will reply you within 24 hours.
Range of Business
Cables:
Low Voltage Power Cable: 0.6/1kV and Below PVC or XLPE Insulated Power Cable
Medium Voltage Power Cable: 6-35kV XLPE Insulated Power Cable
High Voltage (Extra-high Voltage) Power Cable: 66-500kV XLPE Insulated Power Cable
Bare Conductor and Electrical Wires
Cable Accessories:
1~35kv cold shrinkable products
a. Indoor termination
b. Outdoor termination
c. Straight Through Joint
1~35kv heat shrinkable Products
a. Indoor termination
b. Outdoor termination
c. Straight Through Joint
66kv ~500kv Products
a. Porcelain Outdoor termination
b. Compound Sleeve Termination
c. GIS termination ( Assembly, plug-in Type )
d. Premould termination
e. Straight Joint/ Insulation Joint
f. Branch Joint
g. Dry and Y shape Branch Joint
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