Product Overview
Paper wrapped wire is a classic, proven insulated conductor constructed by wrapping multiple layers of high-grade electrical paper around a high-purity copper or aluminum core. After varnish impregnation and curing, it provides superior high voltage withstand, mechanical strength, and oil compatibility.
As the traditional choice for oil-immersed power transformers, welding machines, and lifting electromagnets, paper wrapped wire offers unmatched reliability and cost-effectiveness.
Core Technical Specifications
|
Parameter |
Round Wire |
Flat Wire |
|
Conductor |
≥99.97% Copper / Aluminum |
≥99.97% Copper / Aluminum |
|
Insulation |
Electrical Kraft Paper / Crepe Paper |
Electrical Kraft Paper / Crepe Paper |
|
Temperature Class |
A(105°C) / C(155°C) |
A(105°C) / C(155°C) |
|
Size Range |
φ2.5mm – φ6.0mm |
4mm² – 80mm² |
|
Dielectric Strength |
≥12 kV/mm |
≥12 kV/mm |
|
Standards |
IEC 60317, GB/T7673 |
IEC 60317, GB/T7673 |
Key Product Advantages
1. Exceptional High Voltage Performance
Multi-layer interleaved paper structure provides superior partial discharge resistance, critical for long-term transformer operation.
2. Excellent Oil Compatibility
Specifically designed for oil-immersed transformers. The paper insulation maintains stability and does not degrade in mineral oil.
3. Strong Mechanical Integrity
Interlaced wrapping prevents delamination, even under heavy winding tension.
4. Long-Term Aging Stability
Maintains insulation performance for 20+ years under continuous high temperature and oil immersion.
5. Cost-Effective & Reliable
Proven technology with stable supply and long service life.
Production & Online Monitoring
Precision Wrapping:
Automated machines with real-time overlap control (±0.5mm).
Varnish Impregnation:
Vacuum-pressure treatment for full penetration.
AI Defect Detection:
Real-time alarm for paper tears or gaps.
Primary Applications
- Oil-Immersed Power Transformers
- Distribution Transformers
- Welding Machines
- Lifting Electromagnets
Packing & Logistics
- Spools: Heavy-Duty Wooden
- Outer: IPPC Pallets / Export Crates
- MOQ: 1 Ton
- Lead Time: 2–4 Weeks
Frequently Asked Questions
Q: Can it be used in oil-filled transformers?
A: Yes, excellent oil compatibility.
Q: What is the typical lifespan?
A: 20+ years under rated conditions.
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