Copper Power Cable 4 Core ZR-YJV 3×150mm2+1×70mm2 For Power System
Product Summary
Product Details
Copper power cable 4 core
,power cable 4 core 3×150mm2
,Power System xlpe copper cable
Product Description
Flame Retardant Copper Cable ZR-YJV 3×150mm²+1×70mm² for Commercial Building Power System
Technical Datasheet — ZR-YJV 0.6/1 kV 3×150+1×70 mm²
Cable Designation & Meaning
|
Code |
Meaning |
|---|---|
|
ZR |
Legacy prefix for flame retardant; under GB/T 19666-2019 it defaults to Class C (modern equivalent: ZC). |
|
YJ |
XLPE (cross-linked polyethylene) insulation |
|
V |
PVC outer sheath — flame-retardant grade, contains halogen (Cl) |
|
0.6/1 kV |
Rated voltage U₀/U = 600/1000 V; Uₘ = 1.2 kV |
|
3×150+1×70 mm² |
Three phase cores of 150 mm² copper + one reduced neutral core of 70 mm² copper |
ZR-YJV 3×150+1×70 mm² — Cable Specification & Engineering Data
1. Overview & Ratings. ZR-YJV 3×150+1×70 is a high-capacity flame-retarding 3+1-core cable: three 150 mm² copper phase conductors and one 70 mm² copper neutral conductor, XLPE insulation and one ST2 PVC jacket, rated 0.6/1 kV (Um = 1.2 kV), 50 Hz; manufactured and proof-tested to GB/T 12706.1 / IEC 60502-1, stranding to GB/T 3956, ZC fire class to GB/T 19666. Finished diameter ≈ 42.9 mm, mass ≈ 5326 kg/km (Zhongce 3+1 table), supplied in 100 m coils or wooden drums.
2. Construction Stack. Conductor → outer jacket:
| Layer | Build | Wall | Diameter |
|---|---|---|---|
| Phase conductor (×3) | Annealed Cu, Class 2 compact, 37 × 2.29 mm (1+6+12+18) each | — | ≈ 16.2 mm |
| Neutral conductor (×1) | Annealed Cu, Class 2 compact, 19 × 2.14 mm (1+6+12) | — | ≈ 10.7 mm |
| Phase insulation (×3) | XLPE | 1.4 mm | ≈ 19.0 mm |
| Neutral insulation (×1) | XLPE | 1.1 mm | ≈ 12.9 mm |
| Core assembly | Central neutral + 3 phase cores around + PP filler + polyester binder | — | ≈ 37.9 mm (derived) |
| Outer jacket | Flame-retarded PVC, ST2 compound, black | 2.5 mm | ≈ 42.9 mm (Zhongce) |
3. Electrical Ratings. Phase R ≤ 0.124 Ω/km (≈ 0.158 Ω/km @ 90 °C), neutral R ≤ 0.268 Ω/km @ 20 °C; factory proof 3.5 kV AC / 5 min; finished-cable insulation resistance ≥ 36.7 MΩ·km; XLPE volume resistivity ≥ 1×10¹² Ω·cm; capacitance ≤ 0.35 μF/km; inductance ≈ 0.25 mH/km; AC impedance ≈ 0.15 Ω/km; short-circuit current ≈ 17.3 kA for 1 s. Reference current (3 phase cores loaded) ≈ 440 A in air @ 30 °C / 400 A buried @ 25 °C — Zhongce 3+1 table basis.
Electrical Parameters
|
Parameter |
Value |
Note |
|---|---|---|
|
Rated voltage U₀/U |
0.6 / 1 kV |
Uₘ = 1.2 kV |
|
Test voltage AC (5 min) |
3.5 kV |
Routine |
|
Type-test voltage |
4.0 kV |
IEC 60502-1 |
|
DC resistance @20 °C (phase, per core) |
≤ 0.124 Ω/km |
GB/T 3956 max, 150 mm² |
|
DC resistance @20 °C (neutral, per core) |
≤ 0.268 Ω/km |
GB/T 3956 max, 70 mm² |
|
AC resistance @90 °C (est., phase) |
≈ 0.161 Ω/km |
per core |
|
AC resistance @90 °C (est., neutral) |
≈ 0.349 Ω/km |
per core |
|
Current rating in air (30 °C, single circuit, 3-core+1) |
≈ 300–335 A |
based on 150 mm² phase |
|
Current rating in air (design) |
≈ 315 A |
apply grouping + ambient correction |
|
Direct buried (20–25 °C, soil 1.0–1.2 K·m/W, 0.7 m) |
≈ 335–365 A |
common catalogue 342–355 A |
|
Design buried rating |
≈ 348 A |
soil thermal resistivity correction required |
|
Short-circuit current (1 s, Cu, 250 °C, phase) |
≈ 15.0 kA |
150 mm² reference |
|
Short-circuit current (1 s, Cu, 250 °C, neutral) |
≈ 7.0 kA |
70 mm² reference |
|
Frequency |
50/60 Hz AC |
— |
4. Cable Parameters & Test Parameters
| ZR-YJV 3×150+1×70 mm² — Test & Verification Schedule (GB/T 12706.1 & IEC 60502-1) | ||||
| Stage | Test Item | Method / Standard | Acceptance Criterion | Notes |
| Routine | Phase conductor DC resistance | GB/T 3956 (IEC 60228) | ≤ 0.124 Ω/km @ 20 °C (150 mm²) | Every production length |
| Routine | Neutral conductor DC resistance | GB/T 3956 (IEC 60228) | ≤ 0.268 Ω/km @ 20 °C (70 mm²) | Every production length |
| Routine | Power-frequency withstand | GB/T 12706.1 / IEC 60502-1 | 3.5 kV AC / 5 min, no breakdown | Conductor to earth/water bath |
| Routine | Dimensional inspection | GB/T 2951 | Phase ins. ≥ 1.4 mm; neutral ins. ≥ 1.1 mm; sheath ≥ 2.5 mm; OD within tolerance | Wall & diameter check |
| Routine | Conductor continuity | Visual / electrical | All cores continuous, no break | Every length |
| Sample | XLPE hot-set test | GB/T 12706.1 §16.3.13 / GB/T 2951.11 | 200 ± 3 °C, 15 min, 0.2 MPa: load elongation ≤ 175 %; permanent ≤ 15 % | Cross-linking verification |
| Sample | XLPE tensile & elongation | GB/T 2951 | Tensile ≥ 12.5 MPa; elongation ≥ 200 % | Aged and unaged |
| Sample | PVC sheath tensile & elongation | GB/T 2951 | Tensile ≥ 10.0 MPa; elongation ≥ 125 % | Aged and unaged |
| Sample | PVC thermal stability | GB/T 2951 (Congo-red) | ≥ 200 min @ 200 °C | HCI evolution test |
| Sample | Conductor geometry | GB/T 3956 | Phase: 37 × 2.29 mm Ø ≈ 16.2; neutral: 19 × 2.14 mm Ø ≈ 10.7 | Per batch |
| Type | Single-cable flame test | GB/T 18380.12 | No flame to upper reference mark | ZR property |
| Type | Bunched flame test — C | GB/T 18380.35 | Char ≤ 2.5 m; 20 min; ≥ 1.5 L/m | Class C compliance |
| Type | Bending test | GB/T 12706.1 | No damage on specified mandrel | Multi-core bending rule |
| Type | Insulation resistance | Factory method | ≥ 36.7 MΩ·km @ 20 °C | Not routine under GB/T 12706.1 |
| Post-install | DC withstand commissioning | Q/GDW 13244.1-2018 | 2.4 kV DC / 15 min, no breakdown | Required for new installations |
| Post-install | Phase identification | Visual / continuity | L1/L2/L3/N correctly labelled at both ends | Before energisation |
5. Cable Cross Section Structure
| ZR-YJV 3×150+1×70 mm² — Cross-Section Construction Diagram (Schematic) | |||||
| Layered 3+1 conductor build-up from copper strand to PVC jacket · nominal dimensions per GB/T 12706.1 / IEC 60502-1 · primary data from Zhongce 3+1 table | |||||
| No. | Layer | Material / Construction | Nominal Thickness (mm) | Diameter (mm) | Function / Remarks |
| 1 | Phase conductor (Cu) × 3 | Annealed copper, Class 2 compact strand — 37 wires of 2.29 mm per core (37/2.29, 1+6+12+18 layout), nominal area 150 mm² each | — | ≈ 16.2 (Ø each phase core) | Line-current carrying phase conductors; DC resistance capped at 0.124 Ω/km at 20 °C |
| 2 | Neutral conductor (Cu) × 1 | Annealed copper, Class 2 compact strand — 19 wires of 2.14 mm (19/2.14, 1+6+12 layout), nominal area 70 mm² | — | ≈ 10.7 (Ø neutral core) | Return / neutral path; DC resistance capped at 0.268 Ω/km at 20 °C |
| 3 | Phase insulation (XLPE) × 3 | Cross-linked polyethylene dielectric | 1.4 | ≈ 19.0 (Ø each phase core, incl. insulation) | Electrical isolation; 90 °C continuous rating; withstands 3.5 kV for 5 min |
| 4 | Neutral insulation (XLPE) × 1 | Cross-linked polyethylene dielectric | 1.1 | ≈ 12.9 (Ø neutral core, incl. insulation) | Electrical isolation for the neutral conductor |
| 5 | Core assembly | Neutral core at centre + three phase cores cabled around + PP filler + polyester binder tape | — | ≈ 37.9 (Ø over assembled cores) | 3+1 configuration; derived from Zhongce OD − 2×sheath |
| 6 | Outer jacket (PVC) | Flame-retardant PVC, ST2 compound, black | 2.5 | ≈ 42.9 (Ø finished cable, Zhongce) | Mechanical and moisture protection; ZC flame retardance per GB/T 19666 |
| Key Dimensions & Properties (expanded) | |||||
| Finished cable diameter | ≈ 42.9 | mm | Zhongce 3+1 unarmored table | ||
| Approximate cable mass | ≈ 5326 | kg/km | Zhongce copper-conductor figure | ||
| Nominal voltage rating | 0.6/1 | kV | AC 50 Hz; maximum system voltage Um = 1.2 kV | ||
| Conductor temperature limits | 90 / 250 | °C | Continuous service / short-circuit (≤ 5 s) | ||
| Minimum bend radius (multi-core) | ≥ 15 × OD ≈ 644 | mm | OD = actual finished cable diameter | ||
| Flame-retardant classification | ZC (ZR) | — | Per GB/T 19666 | ||
| Short-circuit current (1 s) | ≈ 17.3 | kA | I = k·A/√t, k=115 for Cu/XLPE (est.) | ||
| AC impedance @ 50 Hz | ≈ 0.15 | Ω/km | √(R² + X²); R-dominant (est.) | ||
| Capacitance (typical) | ≤ 0.35 | μF/km | Per phase core (est.) | ||
| Inductance (typical) | ≈ 0.25 | mH/km | Three-core cable (est.) | ||
| Air ampacity @ 30 °C | ≈ 440 | A | Zhongce basis; Cu, 3 phase loaded | ||
| Buried ampacity @ 25 °C | ≈ 400 | A | Zhongce basis; Cu, 3 phase loaded | ||
| Schematic — not to exact scale. Primary data (OD, weight, ampacity) from Zhongce 3+1 table; conductor/insulation diameters calculated from GB/T 3956 and GB/T 12706.1. Values marked (est.) are engineering estimates. | |||||
6. Thermal & Fire. 90 °C continuous conductor, 250 °C short-circuit (≤ 5 s); service ambient −20 to +45 °C, minimum laying temp 0 °C; max burial soil temp 25 °C; ZC per GB/T 19666 — GB/T 18380.12 single-cable + GB/T 18380.35 category-C bunched (char ≤ 2.5 m); PVC jacket is halogenated and emits smoke under fire — specify WDZ-YJY for LSZH.
7. Installation & Care. Minimum bend ≥ 15 × OD (≈ 644 mm); commissioning DC test 4U0 = 2.4 kV / 15 min before first energisation (Q/GDW 13244.1-2018); warm drums below 0 °C before pulling; max pulling tension ≤ 6000 N; derate the 440/400 A references for ambient, grouping and soil; fit lugs and glands sized for the 16.2 mm phase core, 10.7 mm neutral core and 42.9 mm jacket; verify short-circuit rating against protective device settings.
| Insulation Test Data — ZR-YJV 3×150+1×70 mm² | ||
| ZR-YJV 3×150+1×70 mm² (Cu / XLPE / FR-PVC) · 0.6/1 kV | ||
| 1. Cable Identification | ||
| Item | Description | Standard / Note |
| Designation | ZR-YJV 3×150+1×70 mm² | GB/T 12706.1-2020 |
| Conductor | Bare annealed copper, Class 2 stranded — phase 3×37×Ø2.03 mm, neutral 1×19×Ø2.14 mm | GB/T 3956 / IEC 60228 |
| Insulation | XLPE (cross-linked polyethylene), phase 1.4 mm / neutral 1.0 mm nominal (150 / 70 mm² respectively) | GB/T 12706.1-2020 |
| Insulator colours | L1/L2/L3 = brown/black/grey (150 mm²); N = blue (70 mm²) | IEC 60446 |
| Outer sheath | Flame-retardant PVC (ZR grade), 1.6 mm (multi-core, 3+1 rule), Black (standard) | GB/T 19666-2019 |
| Rated voltage U₀/U | 0.6 / 1 kV | Uₘ = 1.2 kV |
| Number of cores | 4 (3×150 mm² phase + 1×70 mm² neutral, 3+1) | — |
| 2. Insulation Design Data (CORE) | ||
| Parameter | Value | Remarks |
| Insulation material | XLPE (cross-linked polyethylene) | — |
| Nominal thickness (eₙ) | Phase 1.4 mm (150 mm²); Neutral 1.0 mm (70 mm²) | two core sizes |
| Minimum allowable thickness (e_min) | Phase 1.12 mm; Neutral 0.80 mm | eₙ − 0.28 / eₙ − 0.28 (GB/T 12706.1-2020, Table 3) |
| Insulator colours | L1/L2/L3 = brown/black/grey (150 mm²); N = blue (70 mm²) | IEC 60446 |
| Volume resistivity @ 90 °C | ≥ 10¹² Ω·cm | — |
| Dielectric loss factor (tan δ) @ 20 °C | ≤ 1 × 10⁻³ | reference |
| Relative permittivity (εᵣ) | ≈ 2.3 – 2.5 | reference |
| Long-term service temp. | 90 °C | GB/T 12706.1-2020 |
| Short-circuit temp. (≤ 5 s) | 250 °C | IEC 60502-1 |
| Emergency overload temp. | 105 – 130 °C | transient |
| Diameter over insulated core | Phase 15.8 mm; Neutral 9.8 mm | phase 13.0 + 2×1.4 / neutral 7.80 + 2×1.0 |
| 3. Thermal Characteristics | ||
| Property | Value | Remarks |
| Max. conductor operating temp. (normal) | 90 °C | long-term |
| Max. conductor temp. — short-circuit (≤ 5 s) | 250 °C | IEC 60502-1 |
| Emergency overload temp. | 105 °C (up to 130 °C transient) | — |
| Min. installation ambient temp. | 0 °C (pre-heat below 0 °C) | — |
| Service ambient range (PVC sheath) | −15 °C to +90 °C | — |
| Flame retardant class (sheath) | Class C (ZR per GB/T 19666) | — |
| 4. Insulation Test Schedule | ||
| Test Item | Test Value / Condition | Result |
| Routine withstand test (AC) | 3.5 kV AC, 5 min — no breakdown | PASS |
| Type test voltage | 4.0 kV AC | PASS (IEC 60502-1) |
| Partial discharge test | ≤ 10 pC @ 1.73 U₀ (1.73 kV) | PASS (XLPE) |
| Insulation resistance (IR) | ≥ 10⁴ MΩ·km @ 20 °C (reference) | PASS |
| Hot-set test (XLPE cross-linking) | 200 °C, 15 min, load 0.2 N/mm² — elongation ≤ 175 %, permanent set ≤ 15 % | PASS (IEC 60811-507) |
| Aging test (air oven) | 135 °C, 168 h — tensile strength / elongation retained ≥ 80 % | PASS |
| Tensile strength (insulation) | ≥ 12.5 MPa (XLPE, before aging) | PASS |
| Elongation at break (insulation) | ≥ 200 % (XLPE, before aging) | PASS |
| Cold bend test | −15 °C, 4 h — no cracking | PASS |
| Water absorption | ≤ 1 mg/cm² (85 °C, 336 h, reference) | PASS |
| Breakdown voltage (insulation) | ≥ 20 kV/mm (reference) | PASS |
| DC resistance of conductor @ 20 °C | Phase ≤ 0.124 Ω/km; Neutral ≤ 0.268 Ω/km (Class 2 Cu) | PASS (GB/T 3956) |
| Dielectric loss (tan δ) measurement | ≤ 1 × 10⁻³ @ 20 °C | PASS (reference) |
| Spark test (during production) | 6 – 10 kV (online), pinhole detection | PASS |
| Thickness measurement (microscopic) | Phase eₙ = 1.1 / 1.0 mm; e_min ≥ 1.12 / 0.80 mm | PASS |
| 5. Electrical Parameters | ||
| Parameter | Value | Note |
| Rated voltage U₀/U | 0.6 / 1 kV | Uₘ = 1.2 kV |
| Test voltage AC (5 min, routine) | 3.5 kV | IEC 60502-1 |
| Type-test voltage | 4.0 kV | IEC 60502-1 |
| DC resistance @ 20 °C (phase, 150 mm²) | ≤ 0.124 Ω/km | GB/T 3956 / IEC 60228, Class 2 max |
| DC resistance @ 20 °C (neutral, 70 mm²) | ≤ 0.268 Ω/km | GB/T 3956 / IEC 60228, Class 2 max |
| AC resistance @ 90 °C (phase, est.) | ≈ 0.161 Ω/km | per phase core |
| Current rating — in air (30 °C, single circuit) | ≈ 400–430 A (design ≈ 410 A) | 3+1 core |
| Current rating — direct buried (20 °C, soil 1.0 K·m/W, 0.7 m) | ≈ 485–515 A (design ≈ 500 A) | 3+1 core |
| Short-circuit current (1 s, Cu, 250 °C, per core) | ≈ 15.0 kA (per phase core) | reference; neutral ≈ 7.0 kA |
| Frequency | 50/60 Hz AC | — |
| 6. Dimensional / Inspection Result | ||
| Item | Design / Limit | Measured (example) |
| Conductor construction | Phase 3×37×Ø2.03 mm; Neutral 1×19×Ø2.14 mm | 11.20 / 7.70 mm |
| Conductor diameter | Phase ≈ 13.0 mm; Neutral ≈ 7.80 mm | 11.25 / 7.72 mm |
| Insulation thickness (per core) | Phase 1.4 mm / Neutral 1.0 mm (min. 1.12 / 0.80 mm) — all 4 cores | 1.13 / 1.11 / 1.10 / 1.02 mm (L1/L2/L3/N) |
| Diameter over insulated core | Phase 15.8 mm; Neutral 9.8 mm | 13.65 / 9.75 mm |
| Sheath thickness | 1.6 mm (multi-core, 3+1 rule) (min. 1.3 mm) | 1.63 mm |
| Overall cable diameter | 26.0 – 32.0 mm (design ≈ 29.0 mm) | 26.2 mm |
| Approx. weight | 1500 – 1900 kg/km (use ≈ 1750/km) | ≈ 1520 kg/km |
| DC resistance @ 20 °C | Phase ≤ 0.124 Ω/km; Neutral ≤ 0.268 Ω/km | 0.150 / 0.264 Ω/km |
| 50 N/mm² × (3×150 + 1×70) = 26,000 N total | 50 N/mm² × (3×150 + 1×70) = 26,000 N total | conductor sock |
| Minimum bending radius: ≥ 15 × OD ≈ 435 mm @ Ø ≈ 29.0 mm (unarmoured, multi-core) | ||
| Conduit inner diameter: ≥ 1.5 × OD → use 50 mm or 63 mm conduit (≥ 44 mm clear) | ||
| Notes | ||
| 1. All tests performed at ambient 20 ± 5 °C and 45–75 % RH unless otherwise stated. | ||
| 2. Routine tests: withstand (3.5 kV / 5 min), conductor resistance, dimensional check. Type tests: 4.0 kV, partial discharge, hot-set, aging, mechanical (per IEC 60502-1). | ||
| 3. Test values marked “reference” are typical design values — confirm against manufacturer test report / GB/T 12706.1-2020. | ||
| 4. Insulation thickness: phase 150 mm² = 1.4 mm (e_min = 1.4 − 0.28 = 1.12 mm); neutral 70 mm² = 1.0 mm (e_min = 1.0 − 0.20 = 0.80 mm) (GB/T 12706.1-2020, Table 3). | ||
| 5. 3×150+1×70 mm² = three 150 mm² phase cores (L1+L2+L3) + one 70 mm² neutral (N), total 4 cores (3+1); neutral is reduced. Four thickness readings (L1/L2/L3/N) are recorded at inspection. | ||
| 6. For low-smoke halogen-free → WDZ-YJY 3×150+1×70; for fire-survival → NH-ZR-YJV / WDZN-YJY 3×150+1×70; for armoured → ZR-YJV22 3×150+1×70; for separate PE → 5-core cable. | ||
8. Application. Heavy three-phase four-wire distribution, transformer secondaries, large building mains and industrial feeders requiring a dedicated neutral conductor in a single cable (TN-C style) — conduit, tray, trench, duct, trunking, direct burial; indoor or sheltered outdoor.
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