ZR-YJV 4 Core Electrical Cable 4x185mm2 Flame Retardant Copper Power Distribution
Product Summary
Product Details
ZR-YJV 4 core electrical cable
,4 core electrical cable 4x185mm2
,copper power wire 300mm2
Product Description
ZR-YJV 4*185mm² Flame Retardant 4 Core Copper Power Distribution Cable
|
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 |
|
4×185 mm² |
Four cores, nominal copper conductor area 185 mm² per core |
ZR-YJV 4×185 mm² — Cable Engineering Data
1. Product Scope & Ratings. ZR-YJV 4×185 — flame-retarding four-core cable, four 185 mm² Cu conductors, XLPE insulation, one ST2 PVC sheath, rated 0.6/1 kV (Um = 1.2 kV), 50 Hz; manufactured and tested per GB/T 12706.1 / IEC 60502-1, conductor grading per GB/T 3956, ZC flame class per GB/T 19666. ≈ 56.8 mm, ≈ 8034 kg/km (Al ≈ 3310), 100 m coils/drums.
2. Construction Stack. Conductor → outer sheath:
| Layer | Build | Wall | Diameter |
|---|---|---|---|
| Conductor (×4) | Annealed Cu, Class 2, 37 × 2.52 mm (1+6+12+18) each | — | ≈ 17.60 mm |
| Insulation (×4) | XLPE | 1.6 mm | ≈ 20.80 mm |
| Lay-up | Four cores + central filler + binder tape | — | ≈ 50.2 mm (calc.) |
| Sheath | Flame-retarded PVC, ST2, black | 2.4 mm | ≈ 56.8 mm |
3. Electrical Ratings. R ≤ 0.0991 Ω/km @ 20 °C; routine 3.5 kV / 5 min; insulation resistance ≥ 36.7 MΩ·km; XLPE volume resistivity ≥ 1×10¹² Ω·cm; capacitance ≤ 0.45 μF/km. Reference ampacity (four cores loaded) ≈ 375 A air / 390 A buried @ 25 °C — Mingda 4×185, cross-checked with 3×185 (identical per-core values).
|
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 (Class 2 Cu, per core) |
≤ 0.0991 Ω/km |
GB/T 3956 max |
|
AC resistance @90 °C (est.) |
≈ 0.129 Ω/km |
per core |
|
Current rating in air (30 °C, single circuit, 4-core) |
≈ 390–420 A |
common catalogue value |
|
Current rating in air (design) |
≈ 400 A |
apply grouping + ambient correction |
|
Direct buried (20–25 °C, soil 1.0–1.2 K·m/W, 0.7 m) |
≈ 410–460 A |
common catalogue 420–450 A |
|
Design buried rating |
≈ 435 A |
soil thermal resistivity correction required |
|
Short-circuit current (1 s, Cu, 250 °C, per core) |
≈ 18.5 kA |
reference |
|
Frequency |
50/60 Hz AC |
— |
4. Thermal & Fire. 90 °C continuous, 250 °C short-circuit (≤ 5 s); −20~+45 °C ambient, ≥ 0 °C laying; ZC per GB/T 19666 — GB/T 18380.12 single-burn + GB/T 18380.35 class-C bunched (char ≤ 2.5 m); PVC is halogen-bearing → WDZ-YJY for LSZH.
| ZR-YJV 4×185 mm² — Test / Verification Parameters (per GB/T 12706.1 & IEC 60502-1) | ||||
| Stage | Test Item | Method / Standard | Acceptance Criterion | Notes |
| Routine | Conductor DC resistance | GB/T 3956 (IEC 60228) | ≤ 0.0991 Ω/km @ 20 °C (per core) | Every production length |
| Routine | Power-frequency withstand voltage | GB/T 12706.1 / IEC 60502-1 | 3.5 kV AC / 5 min, no breakdown | Conductor-to-earth/water |
| Routine | Construction check | GB/T 2951 | Ins. ≥ 1.6 mm; sheath ≥ 2.4 mm; OD within tolerance | Thickness & diameter |
| Sample | Hot set test — XLPE | 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 degree |
| Sample | Conductor construction & diameter | GB/T 3956 | Class 2; 37 × 2.52 mm; Ø ≈ 17.60 mm | Per batch |
| Type | Single-cable flame test | GB/T 18380.12 | No flame spread to top reference | ZR property |
| Type | Bunched flame test — class C | GB/T 18380.35 | Char ≤ 2.5 m; 20 min; ≥ 1.5 L/m | ZC class |
| Type | Bending test | GB/T 12706.1 | No damage on specified mandrel | Multi-core rule |
| Post-install | DC withstand test | Q/GDW 13244.1-2018 | 2.4 kV DC / 15 min, no breakdown | New installations |
| Optional | Insulation resistance @ 20 °C | Factory method | ≥ 36.7 MΩ·km | Not routine in GB/T 12706.1 |
| Optional | XLPE volume resistivity | Material test | ≥ 1 × 10¹² Ω·cm | Material reference |
5. Installation & Care. Bend ≥ 15 × OD; DC site test 4U0 = 2.4 kV / 15 min before energising (Q/GDW 13244.1-2018); pre-heat drums below 0 °C; de-rate 375/390 A for ambient, grouping, burial; lugs/glands for the 17.60 mm core.
6. Flame Retardant Test Parameters
| Technical Datasheet — Flame-Retardant (FR) Characteristics | ||
| ZR-YJV 0.6/1 kV 4 × 185 mm² (Cu / XLPE / FR-PVC) | ||
| 1. Cable Identification | ||
| Code / Item | Meaning / Value | Standard / Note |
| ZR | Flame Retardant (legacy prefix); under GB/T 19666-2019 defaults to Class C; modern equivalent = ZC | GB/T 19666-2019 |
| YJ | XLPE — cross-linked polyethylene insulation | — |
| V | PVC outer sheath — flame-retardant grade, contains halogen (Cl) | GB/T 19666-2019 |
| 0.6/1 kV | Rated voltage U₀/U = 600/1000 V; maximum Uₘ = 1.2 kV | IEC 60502-1 |
| 4 × 185 mm² | Four cores, nominal copper conductor area 185 mm² per core (all cores equal) | — |
| Construction | Unarmoured, non-screened, round multi-core | — |
| Application note | Four-core → three-phase AC with neutral (L1+L2+L3+N) or with PE (L1+L2+L3+PE), equal conductor sizes | — |
| 2. Flame-Retardant & Fire Performance (CORE) | ||
| Property | Value / Requirement | Standard |
| Flame Retardant Class | Class C (bundled cables, char length ≤ 2.5 m) | GB/T 19666-2019; GB/T 18380.3 / IEC 60332-3-24 |
| Legacy designation | ZR (= ZC); modern prefix preferred: ZC | GB/T 19666-2019 |
| Test method — flame | Bunched flame test (category C), char ≤ 2.5 m after flame removal | GB/T 18380.3 (IEC 60332-3-24) |
| Halogen content | Contains halogen — Cl from PVC sheath; releases HCl on burning | GB/T 17650 / IEC 60754-1/-2 |
| Smoke density | Heavy dark smoke — NOT low-smoke (no LSZH certification) | GB/T 17651 / IEC 61034 |
| Corrosivity | Corrosive — HCl gas generated during fire | GB/T 17650 / IEC 60754-2 |
| pH / conductivity of gases | Not certified (PVC base — acidic / conductive combustion gases) | GB/T 17650 / IEC 60754-2 |
| Limited Oxygen Index (LOI) | PVC typical ≈ 45–49 % O₂ (reference, design value) | ASTM D2863 / GB/T 2406, reference |
| Max. conductor operating temp. | 90 °C (long-term service) | GB/T 12706.1-2020 |
| Max. short-circuit temp. (≤5 s) | 250 °C | IEC 60502-1 |
| Emergency overload temp. | 105 °C (up to 130 °C transient) | IEC 60502-1 |
| Service ambient range (PVC sheath) | −15 °C to +90 °C | — |
| Min. installation ambient temp. | 0 °C (pre-heat required below 0 °C) | — |
| Note: ZR = Flame Retardant only — it does NOT imply low-smoke (LSZH) or fire-survival. PVC sheath is halogenated; upgrade to WDZ-YJY / WDZN-YJY for LSZH or NH-ZR-YJV for fire-survival circuits. | ||
| 3. Fire Test Summary | ||
| Test | Requirement | ZR-YJV 4×185 Verdict |
| Bunched flame test (Class C) | Char length ≤ 2.5 m | PASS (design, Class C) |
| Single flame test (IEC 60332-1) | Self-extinguishing | PASS (XLPE/PVC FR) |
| Smoke density (IEC 61034) | Light transmittance ≥ 60 % for LSZH | N/A (PVC = heavy smoke) |
| Halogen content (IEC 60754) | ≤ 0.5 % HCl for LSZH | N/A (contains Cl) |
| Acidity / corrosivity (IEC 60754-2) | pH ≥ 4.3; conductivity ≤ 10 µS/mm for LSZH | N/A (corrosive HCl) |
| Fire-survival (BS 6387 / IEC 60331) | Circuit integrity during/after fire | N/A — use NH-ZR-YJV / WDZN-YJY |
| 4. Key Electrical & Thermal 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 (per core) | ≤ 0.0991 Ω/km | GB/T 3956 / IEC 60228, Class 2 max |
| AC resistance @ 90 °C (est.) | ≈ 0.129 Ω/km | per core |
| Current rating — in air (30 °C, single circuit) | ≈ 390–420 A (design ≈ 400 A) | 4-core |
| Current rating — direct buried (20–25 °C, soil 1.0–1.2 K·m/W, 0.7 m) | ≈ 410–460 A (design ≈ 435 A) | 4-core |
| Short-circuit current (1 s, Cu, 250 °C, per core) | ≈ 18.5 kA | reference |
| Frequency | 50/60 Hz AC | — |
| Design recommendation: ≈ 400 A in air / ≈ 435 A buried, then apply grouping & ambient + soil-thermal-resistivity correction. Buried rating often > air rating due to better heat dissipation under reference conditions. Catalogue values vary by maker — confirm before specification. | ||
| 5. Construction & Material Specification | ||
| Layer (inside → out) | Description / Specification | FR Contribution |
| Conductor (×4) | Bare annealed copper, Class 2 stranded, 37×∅2.52 mm, conductor Ø ≈ 16.8–18.5 mm | None (Cu non-combustible) |
| Conductor screen | Omitted (not required for 0.6/1 kV) | — |
| Insulation (×4) | XLPE, colours: brown/black/grey/blue etc., 1.6 mm nominal | XLPE — low flame spread |
| Filler | Flame-retardant PP / PE to form round assembly | FR additive |
| Binder | Flame-retardant tape over laid-up cores | FR barrier |
| Outer sheath | Flame-retardant PVC (ZR grade), 2.4 mm nominal, black | Primary FR layer (halogenated) |
| Armour | None | — |
| Metallic screen | None | — |
| 6. Dimensional Data | ||
| Item | Typical Value | Remarks |
| Conductor nominal area (per core) | 185 mm² | — |
| Number of cores | 4 | — |
| Conductor construction | Class 2, 37×∅2.52 mm | IEC 60228 / GB/T 3956, min. 15 wires |
| Conductor diameter (approx.) | 16.8–18.5 mm | compact vs solid-round |
| Insulation thickness | 1.6 mm | 185 mm² class |
| Diameter over insulated core | 20.0–21.7 mm | conductor + 2×1.6 |
| Sheath thickness | 2.4 mm | GB/T 12706, 150–300 mm² range |
| Overall cable diameter | ≈ 46.0–50.0 mm (catalogue range 45.0–52.0 mm) | plain-round design |
| Design outer diameter | ≈ 48.0 mm | common Chinese maker value |
| Approx. weight | 6200 – 7800 kg/km (plain YJV Cu ≈ 6400–7000) | design ≈ 6700 kg/km |
| Cable shape | Round | — |
| 7. Mechanical & Installation Parameters | ||
| Parameter | Value | Note |
| Minimum bending radius (unarmoured multi-core) | ≥ 15 × OD ≈ 675–720 mm @ Ø45–48 mm (≈ 720 mm @ 48 mm) | — |
| Max. pulling tension (Cu only) | 50 N/mm² × 185 mm² × 4 = 37,000 N = 37 kN total | use conductor sock, avoid sheath grip |
| Direct burial | Allowed in non-aggressive soil; for mechanical load / road crossing use ZR-YJV22 4×185 | — |
| Conduit ID | ≥ 1.5 × OD → ≥ 68–72 mm (use 75 mm or 90 mm conduit) | — |
| Fixing spacing | Horizontal tray ≈ 800 mm; vertical ≈ 1500 mm | — |
| Elevation difference limit | None (XLPE) | — |
| 8. Selection Guide — When FR Matters | ||
| Scenario | Recommended Cable | Reason |
| Flame-retardant, halogenated acceptable (standard) | ZR-YJV 4×185 (this cable) | Class C FR, PVC sheath, cost-effective |
| Low-smoke halogen-free required (LSZH) | WDZ-YJY 4×185 | LSZH sheath — IEC 61034 / IEC 60754 compliant |
| Fire-survival circuit (circuit integrity) | NH-ZR-YJV / WDZN-YJY 4×185 | BS 6387 / IEC 60331 fire-survival grade |
| Heavy mechanical load / buried under roads | ZR-YJV22 4×185 | Steel-tape armoured version |
| Separate PE and N required | 5-core version (e.g. 5×185 or 4×185+1×95) | 4×185 has combined/shared PE-N only |
| Applicable standards: GB/T 12706.1-2020 (equiv. IEC 60502-1) · GB/T 3956 / IEC 60228 · GB/T 19666-2019 · GB/T 18380.3 · GB/T 17651 / IEC 61034 · GB/T 17650 / IEC 60754. | Packing: steel-wooden drum or coil, 100–500 m typical. | HS code (China): 8544 4921. | ||
| Values are typical / design reference. Plain-round 185 mm² shows maker-to-maker dimensional variance (OD 45–52 mm, weight 6200–7800 kg/km) — always confirm with manufacturer test reports & relevant local regulations before final specification. | ||
7.Cross Section Structure
| Four-core construction from conductor to outer sheath · nominal values per GB/T 12706.1 / IEC 60502-1 · not to exact scale | |||||
| No. | Layer | Material / Construction | Nominal Thickness (mm) | Diameter (mm) | Function / Remarks |
| 1 | Conductor (Cu) × 4 | Annealed copper, Class 2 stranded — 37 × 2.52 mm per core (37/2.52, 1+6+12+18), nominal 185 mm² per core | — | ≈ 17.60 (Ø per core) | Current-carrying element; max DC resistance ≤ 0.0991 Ω/km @ 20 °C (per core) |
| 2 | Insulation (XLPE) × 4 | Cross-linked polyethylene | 1.6 | ≈ 20.80 (Ø per core, over insulation) | Dielectric barrier; rated 90 °C continuous; withstands 3.5 kV / 5 min |
| 3 | Core lay-up | Four insulated cores laid up around central non-hygroscopic filler; binder tape | — | ≈ 50.2 (Ø over lay-up, calc.) | Forms a round assembly for sheathing |
| 4 | Outer sheath (PVC) | Flame-retardant PVC, ST2 type, black | 2.4 | ≈ 56.8 (Ø overall) | Mechanical & moisture protection; flame retardance ZC (ZR) per GB/T 19666 |
| Key Dimensions & Properties | |||||
| Overall diameter | ≈ 56.8 | mm | Mingda four-core unarmored table | ||
| Approx. cable weight | ≈ 8034 | kg/km | Mingda 8034 (Al ≈ 3310) | ||
| Rated voltage | 0.6/1 | kV | AC 50 Hz; max system voltage Um = 1.2 kV | ||
| Max conductor temperature | 90 / 250 | °C | Continuous / short-circuit (≤ 5 s) | ||
| Min. bending radius (multi-core) | ≥ 15 × OD | — | OD = actual cable diameter | ||
| Flame-retardant class | ZC (ZR) | — | GB/T 19666 | ||
| Schematic — not to exact scale. Nominal values for reference; confirm against factory test certificate. | |||||
8. Application. Heavy distribution risers, plant rooms, large motor and transformer circuits, industrial sub-feeds — conduit, tray, trench, duct, trunking; indoor or sheltered outdoor.
9. Ordering. ZR-YJV 0.6/1 kV 4×185 + length/drum + marking; confirm against factory test certificate.
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