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The CU/XLPE/CTS/STA/PVC three-core power cable 12/20kV manufactured by Zhongdong Cable is designed in accordance with IEC 60502-2 and IEC 60228 (Class 1 or Class 2 copper conductor). It adopts copper conductors, XLPE insulation, copper tape screening (CTS), steel tape armour (STA), and PVC outer sheath, providing stable performance for medium-voltage distribution networks.
Compared with unarmoured MV cables, the STA structure offers improved resistance to external mechanical stress and soil pressure, making it suitable for direct burial and underground installations with higher protection requirements.
|
Type |
Steel Tape Armoured Medium Voltage Power Cable |
Voltage Rating |
12/20 kV |
|
Cores |
3 Core |
Conductor |
Copper, Class 1 / Class 2 (IEC 60228) |
|
Insulation |
XLPE (Cross-linked Polyethylene) |
Screen |
Copper Tape Screen (CTS) |
|
Armour |
Steel Tape Armour (STA) |
Sheath |
PVC ST2 |
|
Standards |
IEC 60502-2 / IEC 60228 |
Cross Reference |
YJV22 / N2XSEBY Equivalent |
Conductor: Stranded annealed copper conductor (Class 1 or Class 2)
Conductor Screen: Semi-conductive layer for electric field control
Insulation: XLPE with high thermal endurance and dielectric strength
Insulation Screen: Semi-conductive layer for uniform stress distribution
Metallic Screen: Copper tape screen (CTS) for grounding and fault current path
Armour: Steel tape armour (STA) for mechanical protection and compression resistance
Bedding: Protective layer between core and armour system
Outer Sheath: PVC (ST2), moisture and abrasion resistant
Design: Three-core, steel tape armoured medium voltage cable (12/20 kV)
The 12/20kV STA copper cable is commonly used in medium-voltage systems where underground protection is required. It is more suitable than unarmoured cables in environments with higher risk of mechanical damage or soil pressure.
Typical applications include:
Urban underground MV distribution networks
Substation outgoing feeder circuits
Industrial plants and manufacturing facilities
Road, railway, and tunnel cable crossings
Direct burial cable routes in protected trenches
Renewable energy distribution systems
Infrastructure and utility backbone projects
IEC: IEC 60502-2 / IEC 60228 / IEC 60332-1 / IEC 60332-3 / IEC 60754-1 / IEC 60754-2 / IEC 61034
DIN VDE: DIN VDE 0276-620
BS: BS 6622 / BS 7835
NF: NF C 33-220
AS/NZS: AS/NZS 1429.1
ASTM: ASTM B3 / ASTM B8
|
No.of Cores and Nominal Cross Section (mm²) |
Nominal Insulation Thickness (mm) |
Nominal Steel Wire Diameter (mm) |
Nominal Sheath Thickness (mm) |
Approx. Overal Diameter (mm) |
Approx. Weight (kg/km) |
Max. DC Resistance of Conductor at 20℃ (Ω/km) |
|
3×35 |
5.5 |
0.5 |
2.8 |
61.3 |
4629 |
0.524 |
|
3×50 |
5.5 |
0.5 |
2.9 |
64.1 |
5202 |
0.387 |
|
3×70 |
5.5 |
0.5 |
3 |
68.2 |
6110 |
0.268 |
|
3×95 |
5.5 |
0.5 |
3.2 |
72.4 |
7183 |
0.193 |
|
3×120 |
5.5 |
0.5 |
3.3 |
75.4 |
8157 |
0.153 |
|
3×150 |
5.5 |
0.5 |
3.4 |
79.1 |
9505 |
0.124 |
|
3×185 |
5.5 |
0.5 |
3.5 |
83 |
10848 |
0.0991 |
|
3×240 |
5.5 |
0.8 |
3.7 |
89.7 |
13726 |
0.0754 |
|
3×300 |
5.5 |
0.8 |
3.9 |
95.1 |
16061 |
0.0601 |
|
3×400 |
5.5 |
0.8 |
4.1 |
101.5 |
19374 |
0.047 |
|
3×500 |
5.5 |
0.8 |
4.3 |
109.8 |
23271 |
0.0366 |
|
3×630 |
5.5 |
0.8 |
4.6 |
118.6 |
28080 |
0.0283 |
STA is typically required when the cable is installed in areas with soil pressure, possible mechanical impact, or where direct burial is planned without additional duct protection.
The steel tape armour slightly increases stiffness, but improves overall installation safety in underground environments where external damage risk is higher.
Installation should be carried out above 0°C, with controlled pulling tension and proper sand bedding in trenches. Avoid sharp bends or sudden direction changes during laying.
The minimum bending radius is 15 × cable overall diameter for installation and 12 × diameter for fixed installation, to ensure the insulation and screen layers remain undamaged.
It is commonly selected in substations, industrial plants, and backbone distribution networks where higher conductivity, stable voltage performance, and long service life are required.
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Fumigated Wooden Drums: Fully heat-treated and officially stamped in strict compliance with ISPM 15 international phytosanitary regulations. This guarantees seamless, delay-free customs clearance at any global port.
Steel-Wooden Hybrid Drums (Iron-Wooden Axle): Engineered with reinforced steel structural frames and durable wood flanging. This hybrid design prevents drum collapse under heavy loads and provides ultimate mechanical protection during rough ocean freight handling.
100% Customized Packaging: We cooperate closely with project engineers to provide tailored packing options—including custom cable lengths per drum, protective lagging, water-proof plastic wrapping, or specific color coding—tailored to your exact on-site installation layout.
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Zhongdong Cable combines premium raw materials, large-scale manufacturing capabilities, and strict quality control systems to deliver cable products that fully match your technical requirements and brand identity.
