ZR-YJV 1*120mm² Flame Retardant Power Cable, 0.6/1kV Full Gauge Pure Copper, XLPE Insulation Anti-Aging PVC Sheath for Engineering Projects

Code Mean:ZR-Flame Retardant,YJ-XLPE Insulation,V-PVC Outer Sheathed

ZR-YJV 1×120 mm² — Technical Dossier

1. Scope & Certification. This dossier covers the ZR-YJV 1×120, a single-core, flame-retarded power cable built to the CU/XLPE/PVC formula and rated 0.6/1 kV (Um = 1.2 kV), 50 Hz. Compliance basis: GB/T 12706.1 / IEC 60502-1 for construction and testing, GB/T 3956 / IEC 60228 for the conductor, and GB/T 19666 together with GB/T 18380 for fire performance. "ZR" marks the cable as flame-retardant; unless an A/B class is ordered, class ZC applies.

2. Bill of Materials (Layer Stack). The cross-section, moving outward, comprises:

Unit weight ≈ 1290 kg/km (the copper core alone accounts for ≈ 1067 kg/km), with the overall diameter spanning 17.8–19.1 mm depending on the maker's stranding practice.

3. Electrical Design Values. DC conductor resistance is capped at 0.153 Ω/km at 20 °C; the routine high-voltage check is 3.5 kV AC for 5 minutes with no breakdown. On the dielectric side, XLPE volume resistivity holds at ≥ 1×10¹² Ω·cm and finished-cable insulation resistance is typically ≥ 36.7 MΩ·km at 20 °C; single-core capacitance stays ≤ 0.45 μF/km. Reference ampacity reaches ≈ 400 A in free air (30 °C, single core) and ≈ 380 A direct-buried, both subject to grouping, ambient and installation derating per GB/T 16895 / IEC 60364.

4. Thermal & Mechanical Data. The thermoset XLPE permits a continuous conductor temperature of 90 °C and a short-circuit ceiling of 250 °C for up to 5 s. Service ambient spans −20 to +45 °C, and laying must not start below 0 °C unless the drum is pre-warmed. For single-core runs, keep the bending radius no tighter than 20 × OD.

5. Fire-Retardancy Proof. The PVC jacket earns the ZC rating: it passes the single-cable vertical burn (GB/T 18380.12) and the category-C bunched burn (GB/T 18380.35 — ≥ 1.5 L/m non-metallic content, 20-minute flame, char extent ≤ 2.5 m). The PVC chemistry does release halogen in fire; switch to WDZ-YJY where low-smoke zero-halogen is a hard requirement.

6. Test & Verification Programme. Routine (every length): DC resistance ≤ 0.153 Ω/km; 3.5 kV/5 min withstand; dimensional audit (insulation ≥ 1.2 mm, sheath ≥ 1.5 mm). Sample: hot-set on the XLPE (200 ± 3 °C, 15 min, 0.2 MPa — elongation under load ≤ 175 %, permanent set ≤ 15 %); stranding and diameter checks. Type: flame tests and mandrel bending. Post-installation: site DC test at 4U0 = 2.4 kV / 15 min (Q/GDW 13244.1-2018 practice).

7.Cross Section Structure

8. Site Handling & Precautions. Keep drums upright and unroll without dragging the jacket over sharp edges; allow slack at terminations instead of over-tensioning. Protect the sheath from UV if laid outdoors long-term. Re-check insulation integrity before energising and never exceed the 3.5 kV/5 min test level during site verification unless the project spec says otherwise.

9. Fields of Use. Main and sub-main feeders, motor and pump circuits, transformer secondary tails, switchboard interconnections and industrial risers at 0.6/1 kV — in trays, conduits, trenches, tunnels and ducts, indoors and in protected outdoor locations.

10. Procurement Notes. Order as: ZR-YJV 0.6/1 kV 1×120, stating length, drum type, marking and any special sheath colour. Delivery is normally 100 m per drum/coil. Always reconcile the figures in this dossier with the factory quality certificate and the GB/T 12706.1 / IEC 60502-1 test report before installation.

11. Fctory overview