1. Industrial Motion & Servo Drive Applications
Li9YCY-J 0.6/1 kV shielded PP-PVC servo motor cable is a low-capacitance, EMC-screened motor feeder engineered for linear drag chains, CNC machining centers, automated palletizers, and multi-axis gantry drives. By combining low-permittivity polypropylene (PP / VDE code 9Y) core insulation with a high-coverage tinned copper braid and an orange RAL 2003 oil-resistant PVC TM5 outer sheath, it limits PWM inverter switching losses while maintaining reliable flex life at a 7.5 × OD travel radius.
Target Automation & Machine Tool Circuits
- AC Servo & Spindle Motor Power Feeds: 4-core (3 phases + PE) power connection between cabinet frequency inverters and moving servo motors without internal brake pairs.
- Linear Energy Chains & Cable Carriers: Continuous reciprocating travel inside indoor automation cells, woodworking machines, packaging lines, and transfer gantries (-5°C to +70°C flexing).
- High-Visibility DESINA Power Colouring: Standard orange RAL 2003 outer jacket immediately identifies 0.6/1 kV servo power circuits alongside green encoder and violet fieldbus harnesses.
Operating Boundaries & Upgrade Paths
- Harsh Coolant or Sub-Zero Travel: If chains are flooded with aggressive synthetic ester cutting oils or flex down to -40°C, upgrade to PUR-sheathed Li9Y11CY-JZ Composite PUR Servo Cable.
- Fixed Tray & Conduit VFD Runs: For static plant floor routing from switchgear to pump/fan motors, compare 2YSLCY-JB 0.6/1 kV PE-PVC VFD Cable.
- Unshielded Contactor / DC Bus Power: Where EMC copper screening is unnecessary, see Li9Y11Y-JZ Unshielded TPE-PUR Drag-Chain Cable.
7.5 × OD) and fixed machine routing (4 × OD). Do not subject braided PVC servo cables to simultaneous multi-axis robotic wrist torsion.2. Cable Construction (Verified Layer-by-Layer Anatomy)
Built from the conductor outward for continuous flexing stability, Li9YCY-J uses short-pitch Class 6 bare copper stranding, stiff low-capacitance PP primary insulation, a sliding fleece separator, and an angle-optimized tinned copper EMC braid beneath an extruded PVC TM5 jacket.
| Layer | Engineering Material & Standard |
|---|---|
| 1. Conductor | Extra-fine stranded annealed bare copper per IEC 60228 / DIN VDE 0295 Class 6 for high bending-cycle fatigue resistance. |
| 2. Core Insulation | Low-capacitance Polypropylene (PP, VDE 9Y); dielectric constant εr ≈ 2.25 reduces capacitive leakage current on long PWM inverter feeds. |
| 3. Core Identification | 3 phase cores (Black U/V/W numbered or Brown/Black/Grey per customer spec) + 1 Green/Yellow protective earth core (4G). |
| 4. Anti-Friction Wrap | Helical non-woven fleece tape decoupling core bundle slip from the metallic braid during chain flexing. |
| 5. EMC Screen | Tinned copper wire braid, optical coverage ≥ 85%, low transfer impedance across 0.1–30 MHz PWM harmonics. |
| 6. Outer Sheath | Oil-resistant, flame-retardant PVC Compound TM5 (EN 50525-2-51 / EN 50363-4-1), Orange RAL 2003. |
3. Electrical, Thermal & Mechanical Characteristics
Li9YCY-J is rated at Uo/U 600/1000 V with a 4,000 V AC factory dielectric test, bridging European EN 50525-2-51 machine-wiring rules and North American 1,000 V industrial drive voltages.
| Characteristic | Specification Value | Test / Standard Reference |
|---|---|---|
| Nominal Voltage (Uo/U) | 0.6 / 1 kV (600 / 1,000 V AC) | EN 50525-2-51; optional UL AWM 1000V 80°C dual-marking on request |
| AC Test Voltage (50 Hz, 5 min) | 4,000 V AC (Core-to-Core & Core-to-Screen) | Routine factory high-voltage dielectric test |
| Insulation Resistance (20°C) | ≥ 500 MΩ×km (PP 9Y Dielectric) | Significantly higher than standard PVC-insulated control cores |
| Operating Temperature | Flexing: -5°C to +70°C | Fixed: -30°C to +70°C | Up to +80°C on dual-rated UL Style 2570 export builds |
| Minimum Bending Radius | Energy Chain Flexing: 7.5 × OD | Fixed Routing: 4 × OD | Measured to inner cable contour without axial twist |
| Flame & Oil Performance | Self-extinguishing; industrial mineral-oil resistant | IEC 60332-1-2 / EN 60332-1-2; EN 50363-4-1 TM5 |
4. Li9YCY-J 4G1.5 to 4G70 mm² Specification & SKU Schedule
Select from 10 standard 4-core (3 phases + green/yellow PE) cross-sections below, covering fractional-kilowatt servo axes up to 110 kW spindle drives. Larger 4G95 and 4G120 mm² feeders or composite builds with control pairs are engineered to order.
| Part No. | Core × Size (mm²) | Conductor Class | Nom. OD (mm) | Min. Flex Bend 7.5×D (mm) | Copper Index (kg/km) | Approx. Weight (kg/km) | Ref. Ampacity 30°C (A) |
|---|---|---|---|---|---|---|---|
| LI9YCY-4G1.5 | 4G1.5 | Class 6 Bare Cu (<=0.15 mm) | 8.9 | 67 | 84 | 138 | 18 |
| LI9YCY-4G2.5 | 4G2.5 | Class 6 Bare Cu (<=0.15 mm) | 10.4 | 78 | 131 | 205 | 26 |
| LI9YCY-4G4 | 4G4 | Class 6 Bare Cu (<=0.15 mm) | 12.1 | 91 | 198 | 286 | 34 |
| LI9YCY-4G6 | 4G6 | Class 6 Bare Cu (<=0.20 mm) | 14.0 | 105 | 286 | 392 | 44 |
| LI9YCY-4G10 | 4G10 | Class 6 Bare Cu (<=0.20 mm) | 17.3 | 130 | 468 | 615 | 61 |
| LI9YCY-4G16 | 4G16 | Class 6 Bare Cu (<=0.20 mm) | 20.6 | 155 | 724 | 910 | 82 |
| LI9YCY-4G25 | 4G25 | Class 6 Bare Cu (<=0.20 mm) | 24.8 | 186 | 1,110 | 1,365 | 108 |
| LI9YCY-4G35 | 4G35 | Class 6 Bare Cu (<=0.20 mm) | 27.9 | 210 | 1,535 | 1,840 | 135 |
| LI9YCY-4G50 | 4G50 | Class 6 Bare Cu (<=0.30 mm) | 32.8 | 246 | 2,180 | 2,590 | 168 |
| LI9YCY-4G70 | 4G70 | Class 6 Bare Cu (<=0.30 mm) | 37.6 | 282 | 3,020 | 3,540 | 207 |
Note: Reference ampacities assume a single 3-loaded-conductor circuit in open air at 30°C ambient per DIN VDE 0298-4. Apply multi-cable grouping and ambient temperature derating factors inside enclosed drag chains.
5. Frequently Asked Questions & Engineering Inquiry
Why does Li9YCY-J use polypropylene (PP / 9Y) core insulation instead of standard PVC on servo motor feeders?
Polypropylene has a relative permittivity of approximately 2.2 to 2.3 compared with 4.0 to 5.0 for standard PVC. That low dielectric constant cuts phase-to-phase and phase-to-screen parasitic capacitance by roughly 45%, reducing PWM inverter capacitive charging spikes, VFD thermal derating, and motor bearing currents over longer machine cable runs while keeping core wall thickness compact for 7.5 × OD energy-chain bending.
When should a machine builder choose Li9YCY-J (PP-PVC) versus PUR-sheathed Li9Y11CY-JZ or fixed 2YSLCY-JB?
Select Li9YCY-J (orange RAL 2003 PVC TM5 sheath) for indoor dry or light oil-mist drag-chain axes operating between -5°C and +70°C where a pure 4-core motor power lead offers optimal cost-to-life performance. Upgrade to PUR-sheathed Li9Y11CY-JZ when synthetic cutting fluids, sub-zero flexing down to -40°C, or integrated 2×control brake/thermal pairs are required; use 2YSLCY-JB for fixed tray and conduit VFD feeds. Explore our full Industrial & Control Cables lineup.
How should the tinned copper braided EMC screen be terminated at the drive cabinet and motor?
Always terminate the tinned copper braid across 360 degrees at both the servo drive EMC earthing clamp and the motor metal EMC cable gland. Avoid twisting the braid into a long pigtail lead, which introduces high-frequency inductance above 1 MHz and degrades radiated/conducted emission suppression.
Can TEBAOFLEX supply dual-norm UL/CSA AWM 1000 V 80°C marking or custom phase core coding?
Yes. Standard phase cores are supplied with U/V/W black numbered coding or brown/black/grey color identification plus a green-yellow protective earth (4G), and dual-norm export builds referencing UL Style 2570 (80°C, 1,000 V) can be confirmed at quotation stage.
Specify Your Li9YCY-J 0.6/1 kV Drag-Chain Servo Motor Cable
Share your motor power rating, cross-section (4G1.5–4G70 mm²), chain travel length, bending radius, and required reel length for direct factory pricing and datasheet confirmation.
