Paper Covered Magnet Wire

Paper Covered Magnet Wire is a type of insulated winding wire made from high-conductivity annealed copper or aluminium, wrapped with layers of electrical-grade kraft paper or crepe paper. This type of magnet wire is specifically engineered for oil-filled transformers, reactors, and other high-voltage electrical equipment where thermal stability, impregnation compatibility, and mechanical durability are essential.

Key Features

• Layered Paper Insulation: High-grade kraft or crepe paper tightly wound around the conductor
• Excellent Dielectric Strength: Ideal for high-voltage insulation in oil-immersed systems
• Compatible with Transformer Oils: Paper absorbs oil for better insulation and cooling
• Thermal Class: Typically up to 90°C (Class A) or higher with special paper coatings
• Robust & Flexible: Withstands mechanical stress during coil winding and installation
• Construction Details:
• Conductor: Round, rectangular, or square electrolytic copper or EC grade aluminium
• Paper Covering: Single, double, or multi-layered kraft, crepe, or thermally upgraded paper
• Width/Thickness: Paper thickness and layers customized to meet insulation level requirements

Applications

• Power and Distribution Transformers (Oil-Immersed)
• Chokes and Reactors
• High-Voltage Coils
• Tap Changers
• Instrument and Control Transformers

Benefits

• Superior Oil Absorption & Impregnation
• High Dielectric Strength and Insulation Resistance
• Minimized Risk of Partial Discharge
• Excellent Performance in Hermetically Sealed Environments
• Available in Custom Shapes and Sizes

Options Available

• Paper types: Kraft, Crepe, DPC (Double Paper Covered), or Thermal-Resistant Paper
• Shapes: Round, Rectangular, Square
• Conductor: Bare, Tinned, or Silver-plated Copper
• Custom paper wrapping (spiral, concentric, longitudinal) as per application needs