YJV22 3x150mm² Copper XLPE Armored MV Cable 8.7/15kV Reliable Underground Power

Cable Designation & Meaning

Construction: Copper conductor, XLPE insulation, semi-con screens, steel tape armour, PVC sheath, three-core medium voltage power cable.

YJV22-3×150 mm² (8.7/15 kV) — Compact Medium-Voltage XLPE Insulated Steel-Tape Armored Copper Power Cable — Specification & Engineering Data

1. Overview & Ratings. YJV22-3×150 — compact medium-voltage XLPE-insulated, double steel-tape armored, PVC-sheathed copper-conductor power cable, three 150 mm² compacted copper conductors (L1/L2/L3), rated 8.7/15 kV (Um = 17.5 kV), 50 Hz; built and tested per GB/T 12701 / IEC 60840. Copper conductors deliver higher current density in a smaller footprint than the aluminum 400 mm² version. Ø ≈ 62 mm, ≈ 5800 kg/km, steel drums.

2. Construction Stack (Conductor → Outer).

3. Electrical Characteristics. R ≤ 0.124 Ω/km at 20 °C (Cu 150 mm²); routine test 25 kV AC / 5 min; partial discharge ≤ 10 pC at 12 kV; insulation resistance ≥ 1500 MΩ·km; capacitance ≈ 0.20 μF/km; tan δ ≤ 0.0004 at 90 °C. Reference ampacity ≈ 265 A (free air, 25 °C).

Insulation Data

Electrical Parameters

Reference values: 150 mm² Cu at 310 A, 3-phase 10 kV → max balanced load ≈ 5.4 MVA. Voltage drop at 310 A ≈ 49.0 V/km per core (≈0.49% per km at 10 kV).

4. Thermal & Mechanical. 90 °C continuous conductor temperature; 250 °C short-circuit (≤ 5 s); 105 °C overload short duration; operating ambient −40~+50 °C; lay ≥ 0 °C. Double steel tape armor provides crush and mechanical protection for direct burial and tray installation.

Temperature Characteristics

Fire Performance (YJV22 — Standard)

5. Installation Practice & Handling. Bend ≥ 15 × OD ≈ 930 mm fixed. Use MV cold-shrink / heat-shrink terminations rated 8.7/15 kV. Qualified personnel only — MV jointing requires specialized training. At 5800 kg/km, heavy steel drums require mechanical handling. The compact Ø62 mm makes it suitable for restricted spaces.

Mechanical & Installation Parameters

6. Typical Service Applications. Compact MV power distribution, building MV risers, industrial substations, wind/solar farm collector circuits, urban grid secondary feeders — where space is constrained but 8.7/15 kV rating is required.

7. Testing & QA Regime. Routine: conductor DC resistance, 25 kV AC / 5 min withstand, partial discharge ≤ 10 pC at 12 kV, insulation resistance. Type: impulse voltage 95 kV, tan δ at 90 °C, bending test, heating cycle, dimensional check.

Cable Parameters

Test Parameters

Cable Cross Section Structure

Construction Description

8. Standards & Conformity. GB/T 12701 (MV plastic-insulated power cables); IEC 60840 (XLPE MV cables); GB/T 3956 (conductors). Rated 8.7/15 kV (Um = 17.5 kV).

9. Packaging, Storage & Logistics. 500 m per steel drum with sealed ends. Continuous marking: YJV22, 3×150, 8.7/15 kV, GB/T 12701, metre marks. Store dry, indoor, ends sealed.

10. Procurement Specification. State "YJV22-3×150, 8.7/15 kV" + length. Order matching MV terminations/joints rated 8.7/15 kV. Confirm against factory test certificate (including partial discharge report).

11. Cable Industry FAQ.

• Q1: What is the difference between YJV22-3×150 (8.7/15 kV) and YJLV22-3×400 (8.7/10 kV)? YJV22 uses copper conductors (150 mm², Ø62 mm, 265 A, 25 kV test), while YJLV22 uses aluminum conductors (400 mm², Ø85 mm, 410 A, 21 kV test). Copper has higher conductivity per area, so 150 mm² Cu carries similar current to ~240 mm² Al. The 8.7/15 kV rating is also higher than 8.7/10 kV.
• Q2: When do I choose 8.7/15 kV instead of 8.7/10 kV? 8.7/15 kV is used in systems where the phase-to-phase voltage can reach 15 kV (e.g., 10 kV nominal with high system voltage). The higher rating provides extra margin for temporary overvoltages.
• Q3: Why use copper instead of aluminum? Copper has ~60% higher conductivity than aluminum, so a copper 150 mm² cable is physically smaller (Ø62 mm) than an aluminum 400 mm² cable (Ø85 mm) while carrying similar current. Choose copper where space is limited; choose aluminum where long-distance cost matters.
• Q4: What does "22" mean? 22 = inner PVC bedding + double steel tape armor + outer PVC sheath. Standard for buried or duct-installed MV cables.
• Q5: What is the routine test voltage for 8.7/15 kV? 25 kV AC for 5 minutes — higher than the 8.7/10 kV version (21 kV), because the insulation is thicker (4.5 mm vs 5.5 mm for the 10 kV class, but rated higher U0).
• Q6: What is partial discharge? Tiny electrical sparks inside the insulation at defects. MV cables must have ≤ 10 pC at rated voltage to ensure long life. Excessive partial discharge leads to insulation breakdown.
• Q7: Can YJV22 be used outdoors? Yes — the outer PVC sheath is UV-resistant. For direct burial, the steel tape armor provides crush protection.
• Q8: What bending radius is required? 15×OD ≈ 930 mm for fixed installation. Smaller than the 400 mm² version (1275 mm) because the overall diameter is smaller.
• Q9: What is the impulse voltage test level? 95 kV lightning impulse — higher than the 8.7/10 kV version (75 kV), because the 8.7/15 kV insulation must withstand higher surge voltages.
• Q10: Can YJV22 be used for fire pump circuits? No — YJV22 is not fire-resistant. Fire pump circuits must use mineral-insulated fire cables (BTTRZ/BTLY). YJV22 is for standard MV power distribution.
• Q11: How is the cable terminated? MV cold-shrink or heat-shrink terminations rated 8.7/15 kV. The termination must carefully strip the XLPE insulation, insulation screen, and conductor screen in the correct order. Only trained personnel should terminate MV cables.