Applications:
A three-core medium voltage power cable is a type of electrical cable designed to transmit electrical power at medium voltage levels and has three conductors within a single cable. The three core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.6/6.6KV to 19/33KV and frequency 50Hz. Three-core medium voltage power cables are commonly used for distributing electrical power in various applications, including industrial plants, utilities, renewable energy projects, and other scenarios where medium voltage is required.
Conductors:
Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper conductors shall be stranded (class 2) and aluminium conductors shall be either solid or stranded (class 2).
Insulation:
Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2.
Assembly:
The three conductors are often arranged in a triangular formation within the cable, and they may be helically twisted together to reduce electromagnetic interference.
Screen:
Extruded layer of semi-conducting cross-linkable compound is applied over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm and the maximum resistivity shall not exceed 500 Ohm-m at 90°C.
Parameter：
| No. Cores | Conduct or Cross Sec- tion Area (mm²) | Cable Cross Section Area (mm²) | Actual Armour Cross Section Area (mm²) | Overall Diameter (mm) | Gland Size |
Cleat Size | Nominal Weight (kg/km) | Resistance of Copper Conductor (Ω/Km) at 200C |
| 3 | 1.5 | 124.63 | 16 | 12.6 | 20s | 6 | 330 | 12.1 |
| 3 | 2.5 | 156.07 | 19 | 14.1 | 20s | 6 | 390 | 7.41 |
| 3 | 4 | 183.76 | 20 | 15.3 | 20s | 6 | 464 | 4.61 |
| 3 | 6 | 216.31 | 23 | 16.6 | 20 | 7 | 568 | 3.08 |
| 3 | 10 | 298.5 | 39 | 19.5 | 20 | 8 | 866 | 1.83 |
| 3 | 16 | 366.25 | 45 | 21.6 | 25 | 10 | 1152 | 1.15 |
| 3 | 25 | 510.45 | 62 | 25.5 | 32 | 11 | 1800 | 0.727 |
| 3 | 35 | 615.44 | 68 | 28 | 32 | 11 | 2230 | 0.524 |
| 3 | 50 | 637.62 | 78 | 28.5 | 32 | 12 | 2490 | 0.387 |
| 3 | 70 | 813.92 | 90 | 32.2 | 40 | 14 | 3290 | 0.268 |
| 3 | 95 | 1074.67 | 128 | 37 | 40 | 16 | 4440 | 0.193 |
| 3 | 120 | 1281.25 | 141 | 40.4 | 50 | 16 | 5470 | 0.153 |
| 3 | 150 | 1625.15 | 201 | 45.5 | 50 | 18 | 6930 | 0.124 |
| 3 | 185 | 1946.83 | 220 | 49.8 | 50 | 20 | 8350 | 0.0991 |
| 3 | 240 | 2383.27 | 250 | 55.1 | 63 | T9 | 10400 | 0.0754 |
| 3 | 300 | 2844.87 | 269 | 60.2 | 63 | T10 | 12600 | 0.0601 |
| 3 | 400 | 3481.91 | 304 | 66.6 | 75 | T11 | 14600 | 0.047 |
