PIW(CR)-240 Corona-Resistant Rectangular Enameled Copper Wire – Class 240
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PIW(CR)-240
Corona-Resistant Rectangular Enameled Copper Wire – Class 240 Aromatic Polyimide Insulation with Enhanced Partial Discharge Protection for Inverter-Driven Motors
PIW(CR)-240 is a premium corona-resistant rectangular enameled copper wire featuring filled aromatic polyimide (PI) insulation – Class 240, specifically engineered for inverter-fed motor applications where partial discharge (corona) poses a significant threat to winding insulation life.
Compared to traditional round wires, the rectangular cross-section maximizes copper fill within a given slot – achieving 25-30% higher copper density – significantly reducing I²R losses and improving motor efficiency. The corona-resistant polyimide insulation incorporates inorganic fillers (such as titanium dioxide and silica dioxide) that dissipate electrical charge and suppress partial discharge activity, extending motor life in variable frequency drive (VFD) applications by up to 50-100 times compared to conventional Class 220 wires[citation:5].
With a thermal class of 240°C, heat shock resistance up to 260°C, and a cut-through temperature exceeding 450°C, PIW(CR)-240 delivers exceptional reliability in the most demanding inverter-driven applications, including EV traction motors, HVAC compressors, and wind turbine generators.
Key Features & Benefits
Filled polyimide insulation with inorganic fillers (TiO₂/SiO₂) suppresses partial discharge – extends inverter-driven motor life by 50-100× vs conventional Class 220 wires[citation:5][citation:9].
Highest continuous operating temperature – 240°C, with cut-through exceeding 450°C – outperforms conventional Class 220 by a wide margin.
25-30% higher copper fill factor compared to round wire – lower I²R losses, better heat dissipation, and compact high-power-density designs.
Available in Grade 1 (Single Build), Grade 2 (Heavy Build), and Grade 3 (Triple Build) for flexible dielectric strength selection.
Exceptional stability under gamma radiation, aggressive chemicals, and cryogenic temperatures – ideal for aerospace, nuclear, and downhole applications[citation:1][citation:2].
Meets IEC 60317-46, IEC 60317-47, GB/T 6109.22, and NEMA MW 16-C standards for corona-resistant grades[citation:1][citation:2].
Product Parameters
| Model Number | Conductor Material | Thermal Class | Insulation Material | Cross-Section (mm²) | Film Grade |
|---|---|---|---|---|---|
| PIW(CR)-1/240 | Copper | 240 | Corona-Resistant PI (Filled) | 1 – 20 | 1 (Single Build) |
| PIW(CR)-2/240 | Copper | 240 | Corona-Resistant PI (Filled) | 1 – 20 | 2 (Heavy Build) |
| PIW(CR)-3/240 | Copper | 240 | Corona-Resistant PI (Filled) | 1 – 20 | 3 (Triple Build) |
💡 Key Technical Data: Heat Shock: 260°C · Cut-through Temperature: 450°C · Standards: IEC 60317-46, GB/T 6109.22, NEMA MW 16-C · Corona Resistance: Filled PI construction with TiO₂/SiO₂ fillers[citation:1][citation:2]
※ Custom cross-sections and film grades are available upon request. Specifications: 1 – 20 mm². Aluminum and CCA versions also available.
Dimensional Specifications (Grade 2 / Heavy Build – Representative Sizes)
以下为Grade 2代表性尺寸。Grade 1和Grade 3可应要求提供。完整尺寸表（1–20 mm²）请联系我们索取。
| a × b (mm) | Tolerance (mm) | Min. Film Build Gr.2 (mm) | Max. Outer Dimension (mm) | Breakdown Voltage (Min) |
|---|---|---|---|---|
| 1.00 × 2.00 | ±0.03 / ±0.05 | 0.045 | 1.10 × 2.10 | ≥ 3200V |
| 1.20 × 3.00 | ±0.03 / ±0.05 | 0.050 | 1.32 × 3.12 | ≥ 3800V |
| 1.50 × 4.00 | ±0.04 / ±0.06 | 0.050 | 1.62 × 4.12 | ≥ 4200V |
| 2.00 × 5.00 | ±0.04 / ±0.07 | 0.055 | 2.14 × 5.14 | ≥ 4800V |
| 2.50 × 6.30 | ±0.05 / ±0.08 | 0.060 | 2.65 × 6.45 | ≥ 5300V |
| 3.00 × 8.00 | ±0.06 / ±0.10 | 0.065 | 3.18 × 8.18 | ≥ 6000V |
| 4.00 × 10.00 | ±0.06 / ±0.12 | 0.070 | 4.20 × 10.20 | ≥ 6800V |
※ Full dimensional table including all cross-sections from 1 mm² to 20 mm² is available upon request. Corner radius can be tailored.
Typical Applications
PIW(CR)-240 is specified in inverter-driven and variable frequency drive (VFD) applications where partial discharge resistance is critical:
Product Gallery
【图片占位 1 – 耐电晕扁线产品图】
建议放置：PIW(CR)-240扁铜漆包线产品实拍图（展示矩形截面、线轴、线圈样品）
尺寸建议：1200×800px，居中显示
Manufacturing Facilities
【图片占位 2 – 工厂车间】
建议放置：耐电晕扁线生产车间实拍图（聚酰亚胺专用生产线、多道涂漆设备、检测仪器）
尺寸建议：1200×600px
Packaging & Transportation
【图片占位 3 – 包装线轴】
建议放置：扁线专用线轴实拍图或包装示意图（PL系列/P系列线轴，真空防潮包装）
| Spool Type | d1 (mm) | d4 (mm) | l1 (mm) | l2 (mm) | Spool Weight (g) | Net Wire Weight (kg) | Spools per Box |
|---|---|---|---|---|---|---|---|
| PL-1 | 80 | 20 | 120 | 100 | 240 | 0.5 | 8 |
| PL-4 | 125 | 25 | 190 | 160 | 860 | 4 | 4 |
| P-5 | 160 | 20 | 114 | 90 | 290 | 4 | 4 |
| P-10 | 200 | 25 | 134 | 110 | 500 | 8 | 2 |
| P-30 | 300 | 31 | 160 | 130 | 1290 | 25 | 1 |
| PC400 | 400 | 52 | 260 | 224 | 2500 | 60 | 1 |
※ Corona-resistant polyimide wire is supplied with moisture-proof vacuum packaging to preserve insulation properties.
Why Choose CHINGCUNG for PIW(CR)-240 Rectangular Wires?
- Advanced Corona-Resistant Technology – Filled polyimide insulation with TiO₂/SiO₂ fillers provides superior partial discharge resistance for inverter-driven motors[citation:1][citation:9].
- Dedicated Class 240 Production – Specialized polyimide production line with advanced multi-pass coating technology and in-line eccentricity inspection.
- Comprehensive Film Grades – Grade 1, Grade 2, and Grade 3 available to meet varying dielectric strength and insulation thickness requirements.
- Global Compliance – Strict adherence to IEC 60317-46, IEC 60317-47, GB/T 6109.22, and NEMA MW 16-C standards[citation:1][citation:2].
- Flexible MOQ – Sample orders welcome for qualification testing; bulk orders supported with 15-20 working days lead time.
- Engineering Support – Free DFM feedback for customized profiles, hybrid insulation, and custom film builds.
Get a Quote
Need PIW(CR)-240 corona-resistant rectangular wire for your inverter-driven application?
Contact our engineering team for free samples, technical datasheets, or a customized quotation with your specific dimensions.
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📞 Tel: +86-13621982708 | 🌐 www.chingcung.com
| Material | Copper |
|---|---|
| Model Number | PIW(CR)-T*W |
| Color | Natural |
| Applicable | EV Traction Motors (Inverter-Driven), HVAC Compressor Motors, Wind Turbine Generators, Aerospace Actuators, Downhole Drilling Equipment |
| Conductor Size | 1 – 20 mm² |
| Thermal Class | Class 240 (Highest Rating) |
| Insulation Materials | Corona-Resistant Aromatic Polyimide (Filled with TiO₂/SiO₂) |
| Corona Resistance | Extends inverter-driven motor life by 50-100× compared to conventional Class 220 wires |
| Core Advantage | Corona-Resistant + Class 240 Highest Thermal Rating + Rectangular Profile for 25-30% Higher Copper Fill Factor + Radiation/Chemical Resistance |
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