Qiancheng 12/20kV XLPE Insulated Power Cable is applied for new-build and renovation projects of various 20 kV medium-voltage power transmission. It provides two major series: single-core & three-core copper-core YJV and aluminum-core YJLV, with optional LSZH halogen-free low-smoke sheath. Widely adopted in new-energy and power-grid infrastructure projects at home and abroad. Measured operation data and project cases are available for verification.
|
Nominal Conductor Cross-sectional Area (mm²) |
Insulation Thickness (mm) |
Sheath Thickness (mm) |
Approximate Cable Outer Diameter (mm) |
DC Resistance Cu (Ω/km) |
DC Resistance Al (Ω/km) |
Test Voltage (kV/5min) |
Ampacity-Cu in Air (A) |
Ampacity-Al in Air (A) |
Ampacity-Cu in Direct-buried Soil (A) |
Ampacity-Al in Direct-buried Soil (A) |
|
1×35 |
5.5 |
2.0 |
27 |
≤0.524 |
≤0.868 |
42 |
170 |
135 |
180 |
135 |
|
1×50 |
5.5 |
2.0 |
29 |
≤0.387 |
≤0.641 |
42 |
205 |
160 |
215 |
160 |
|
1×70 |
5.5 |
2.0 |
30 |
≤0.268 |
≤0.443 |
42 |
260 |
200 |
265 |
200 |
|
1×95 |
5.5 |
2.0 |
32 |
≤0.193 |
≤0.320 |
42 |
315 |
245 |
315 |
240 |
|
1×120 |
5.5 |
2.0 |
34 |
≤0.153 |
≤0.253 |
42 |
360 |
280 |
360 |
270 |
|
1×150 |
5.5 |
2.0 |
35 |
≤0.124 |
≤0.206 |
42 |
410 |
320 |
405 |
305 |
|
1×185 |
5.5 |
2.5 |
38 |
≤0.0991 |
≤0.164 |
42 |
470 |
365 |
455 |
345 |
|
1×240 |
5.5 |
2.5 |
40 |
≤0.0754 |
≤0.125 |
42 |
555 |
435 |
530 |
400 |
|
1×300 |
5.5 |
2.5 |
43 |
≤0.0601 |
≤0.100 |
42 |
640 |
500 |
585 |
455 |
|
1×400 |
5.5 |
2.5 |
45 |
≤0.0470 |
≤0.0778 |
42 |
745 |
585 |
650 |
520 |
|
1×500 |
5.5 |
2.5 |
48 |
≤0.0366 |
≤0.0605 |
42 |
885 |
680 |
765 |
595 |
|
1×630 |
5.5 |
2.6 |
49 |
≤0.0283 |
≤0.0469 |
42 |
980 |
790 |
860 |
680 |
|
1×800 |
5.5 |
2.8 |
57 |
≤0.0221 |
≤0.0367 |
42 |
1100 |
910 |
950 |
765 |
|
1×1000 |
5.5 |
2.9 |
61 |
≤0.0176 |
≤0.0291 |
42 |
1230 |
1030 |
1040 |
850 |
|
1×1200 |
5.5 |
3.1 |
65 |
≤0.0151 |
≤0.0247 |
42 |
1320 |
1120 |
1100 |
910 |
|
3×35 |
5.5 |
3.0 |
57 |
≤0.524 |
≤0.868 |
42 |
140 |
110 |
155 |
120 |
|
3×50 |
5.5 |
3.0 |
60 |
≤0.387 |
≤0.641 |
42 |
165 |
130 |
180 |
140 |
|
3×70 |
5.5 |
3.0 |
63 |
≤0.268 |
≤0.443 |
42 |
210 |
165 |
220 |
170 |
|
3×95 |
5.5 |
3.5 |
67 |
≤0.193 |
≤0.320 |
42 |
255 |
200 |
235 |
210 |
|
3×120 |
5.5 |
3.5 |
71 |
≤0.153 |
≤0.253 |
42 |
290 |
225 |
260 |
235 |
|
3×150 |
5.5 |
3.5 |
74 |
≤0.124 |
≤0.206 |
42 |
330 |
255 |
300 |
260 |
|
3×185 |
5.5 |
3.5 |
78 |
≤0.0991 |
≤0.164 |
42 |
395 |
295 |
350 |
300 |
|
3×240 |
5.5 |
3.5 |
84 |
≤0.0754 |
≤0.125 |
42 |
455 |
345 |
435 |
345 |
|
3×300 |
5.5 |
4.0 |
89 |
≤0.0601 |
≤0.100 |
42 |
565 |
390 |
485 |
390 |
|
3×400 |
5.5 |
4.1 |
96 |
≤0.0470 |
≤0.0778 |
42 |
640 |
450 |
520 |
440 |
Compared with ordinary cables, it features low insulation dielectric loss and excellent water-tree aging resistance. Insulation thickness tolerance is controlled within ±0.05 mm to avoid breakdown risks caused by electric-field concentration. Its designed outdoor service life reaches up to 40 years.
Shield lap rate ≥25%. It has passed stringent high-voltage withstand tests with partial-discharge level lower than 10 pC. It copes with power-grid load fluctuations and greatly reduces unexpected power-outage failures.
Low-smoke, non-toxic and corrosion-free fumes under fire conditions with light transmittance ≥70%. Complete sets of IEC test certificates in Chinese & English are available for easy fire-safety acceptance of public projects.
Copper-core types deliver low line loss for short-distance heavy-load scenarios. Aluminum-core YJLV reduces self-weight by 30%, effectively cutting overall project costs for long-distance power transmission.
The enterprise owns a CNAS-accredited laboratory. Complete test videos are archived for each batch of Qiancheng 12/20kV XLPE Insulated Power Cable. Cables are attached with traceable QR-codes, and customer on-site random inspection is supported.
Stable insulation structure resists damp-caused breakdown during long-term operation. It maintains stable insulation resistance even under humid mine and chemical-plant conditions and reduces short-circuit failures.
Conventional flame-retardant versions restrain flame spread. Custom halogen-free low-smoke variants produce no highly toxic corrosive fumes in fire, guaranteeing visibility for personnel evacuation passages and suitable for densely-populated areas.
Armored types resist extrusion and stone impact. Outer sheath is UV-resistant and acid-alkali-corrosion-resistant, preventing damage under outdoor and underground laying and eliminating electric-leakage hazards.
20 kV on-site power-transmission lines for photovoltaic and wind-power step-up substations.
Medium-voltage power-supply lines for regional substations and urban power-grid upgrading & renovation.
20 kV on-site power-distribution systems for chemical plants and large industrial parks.
Urban Public Infrastructure Rail transit, underground comprehensive utility tunnels, large-scale hospitals and commercial complexes. Halogen-free low-smoke types are preferred for enclosed underground spaces.
Qiancheng 12/20kV XLPE Insulated Power Cable can be laid on cable trays, in cable trenches, tunnels and protective conduits. Armored types are recommended for light direct burial in loose soil.
Pre-heat cables above 5℃ before laying when ambient temperature is below 0℃ to prevent insulation brittle cracking under low temperature.
Keep wiring away from sharp edges and corners to avoid sheath scratching and water ingress which triggers water-tree aging.
Single-core AC cables shall never be installed inside steel conduits alone, to prevent eddy-current heating that accelerates cable aging.
A: The double-layer metallic shield is designed with a lap rate of ≥25%, while partial discharge is controlled below 10 pC. Combined with high-voltage withstand testing, the shielding structure helps improve electrical stability and reduce the risk of insulation-related failures during operation.
A: XLPE insulation features low dielectric loss and stable electrical performance. The insulation thickness tolerance is controlled within ±0.05 mm to maintain a uniform electric field and reduce the risk of localized stress. Proper installation practices, including preventing sheath damage and water ingress, further improve long-term reliability.
A: Yes. It is suitable for medium-voltage power transmission systems in photovoltaic and wind-power projects. Copper conductor versions can be selected for high-load applications, while aluminum conductor YJLV versions are suitable for longer transmission distances where weight and cost control are important.
A: Conventional flame-retardant cables mainly focus on limiting flame spread. Halogen-free low-smoke versions provide additional advantages, including reduced smoke emission, non-corrosive combustion gases, and light transmittance of ≥70%, making them suitable for enclosed areas such as utility tunnels and public facilities.
A: The stable insulation structure helps maintain insulation resistance in humid conditions and reduces the possibility of electrical faults. Armored versions provide additional mechanical protection against external pressure and impact in demanding installation environments.
A: Non-armored types are generally used in cable trays, trenches, tunnels, and protective conduits where mechanical protection is available. Armored types are recommended for direct burial or areas with higher mechanical stress to improve resistance against external damage.
A: Aluminum conductor versions are commonly used in long-distance transmission projects due to their lower weight and cost advantages. Copper conductor versions are preferred for applications requiring higher conductivity or concentrated load capacity.
A: At temperatures below 0℃, preheating the cable above 5℃ before installation is recommended to reduce the risk of insulation cracking. During laying, avoid excessive bending, sharp edges, and mechanical damage to maintain cable performance.
Address
Qiancheng Cable Co., Ltd., Hengde Industrial Park, Gucheng County, Hengshui City, Hebei Province, China
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