About Hunan Powerwell Industrial Co., LTD.

 

Welcome to the global home of high-performance electrical insulation materials. At Hunan Powerwell Industrial Co., LTD. (and our export division, Hunan General Industrial Products Import & Export Co., LTD.), we provide a comprehensive, one-stop suite of world-class insulation solutions engineered for electric motors, transformers, and drive systems.
As a trusted global supplier with over 25 years of specialized industry experience, our materials are meticulously engineered to meet the rigorous mechanical, thermal, and electrical demands of today’s heavy power industries.

 

Our Commitment to Quality & International Standards

Quality is paramount to our operations and essential to our customers’ long-term success. Every item we supply carries our hallmark of excellence: all products strictly conform to IEC (International Electrotechnical Commission) and other globally recognized standards (including EN and DIN). From 100% pure sulfate wood pulp base papers to high-density boards, our products undergo rigorous testing and inspection to ensure peak reliability, chemical purity, and performance in high-voltage environments.

 

Comprehensive Product Portfolio & Technical Specifications

Derived directly from our specialized manufacturing catalog, “Catalog-Hunan Powerwell (Transformer Insulation Materials).pdf,” our premium product line spans raw insulation materials, rolls, and pre-machined internal components:

●Transformer Pressboard & Presspaper: Featuring our high-stiffness, hot-pressed PSP3052 (Type B 3.1 according to IEC 641-1) with exceptional breakdown voltage in oil (>=45-50kV/mm); and our highly flexible, calendered PSP3050 (Type B 2.1.A) designed for moldable structures. We also provide high-purity PSP3055 Presspaper (Type P 4.1), Electrical Grade Insulating Kraft Paper, and ultra-thin Capacitor Paper (down to 8.0 um).

●Diamond Dotted Paper (DDP): High-purity Kraft paper coated with a heat-curable epoxy resin in a precise diamond pattern (9.5mm X9.5mm), engineered to securely bond neighboring conductors at 90 degree celsius with an adhesion strength >= 450kPa

●Crepe Paper & Crepe Tubes: Highly elastic crepe papers with an elongation range of 15% to 300% to insulate irregular surfaces, alongside multi-layer transversally creped tubes reaching up to 104.0KV breakdown strength in oil.

●Transformer Plywood & Laminated Board: Phenol-formaldehyde resin-bonded beech veneers pressed under high temperature and pressure (145-150 degree celsius, 6-12MPa) conforming to EN 61061-2, alongside heavy-duty Laminated Transformerboard up to 120mm thick.

●Flexible Laminates & Banding: Advanced multi-layer insulation sheets including DMD, NMN, and NHN for versatile thermal classes, as well as high-tensile Cotton Banding Tapes.
Precision Customization & Advanced Processing Capabilities

We don't just supply raw materials; we deliver ready-to-assemble, custom-tailored components engineered exactly to your CAD drawings. Our factory features state-of-the-art tooling capable of delivering an average turnaround time of just 2 weeks. Our processing capabilities include:

●CNC Milling, Routing & Engraving: For custom transformer plywood and heavy laminated board components.

●Formed & Molded Components: Hand-molded and semi-automatic pressed Angle Rings & Caps, Pressed Sectors, Cylinders, Edge Protection Rings, and Snouts or Flange Tubes.

●Spacing & Shielding Elements: Precision-machined block washers, Clackband (with trapezoidal blocks), Thermoflow duct strips, ladder bands, milled radial spacers, and machine-wrapped metallized shield rings.

●Precision Slitting, Punching & Die-Cutting: High-speed tape slicing to custom widths and intricate punching for gaskets, sheets, and spacer strips.

 

Our Mission & Core Values

Our mission is to deliver premium-quality, internationally compliant products at highly competitive prices, sourced directly from China. We aim to enhance the quality and lifespan of our customers’ end products while serving as a trusted, agile, and seamless partner in their global supply chain.

●Professionalism: Maintained in every technical interaction with global customers and suppliers.

●Commitment: Dedicated to continuous improvement across all material processing and manufacturing systems.

●Excellence: Striving in our customer-centric technical support to consistently exceed engineering expectations.

●Flexibility: Quick to adapt to evolving customized needs, tight tolerances, and urgent structural project challenges.

Partner with Hunan Powerwell Industrial Co., LTD. — providing insulation solutions you can trust to power your global success.