Film-Insulated Winding Wires
Your Leading Film-Insulated Winding Wires Supplier
Trust In Grid Co., Ltd. is a professional transformer manufacturer, specializing in the design and production of power transformer, high-voltage switchgear, power distribution equipment, energy storage systems (ESS), magnetic wire, bushing and machining parts. Our power transformers are available in 500KV, 330KV, 220KV, and 110KV models, and are widely used in power utilities, renewable energy systems (solar and wind), industrial facilities, data centers, transportation infrastructure, and OEM applications.
Why Choose Us?
Production Capacity
With 6 factories covering 240,000 m², over 2,000 employees, and 200+ engineers, we support large-scale projects and long-term global supply with more than 30 years of export experience.
Advanced Equipment
We operate a complete set of in-house production equipment, including cutting, winding, CNC machining, vacuum drying, and testing systems, with over 450 machines ensuring stable quality and efficient output.
Quality Control
All products are manufactured and tested in compliance with IEC, IEEE, ANSI, CSA, UL/cUL, CE, and ISO 9001:2015 standards, ensuring reliable performance and smooth international approval.
OEM & ODM Capability
Our engineering team provides OEM/ODM support, including customized design and technical optimization, delivering tailored solutions for utility, industrial, and renewable energy projects.
Technical Specifications of Film-Insulated Winding Wires
|
Wrapping Configuration |
Insulation Thickness (mm) |
Breakdown Voltage V≥ |
|
|
Nominal Value |
Tolerance |
||
|
Two-layer polyester film |
0.22 |
±0.05 |
5000 |
|
Two-layer polyester film + one-layer non-woven fabric |
0.33 |
±0.05 |
5000 |
|
Three-layer polyester film |
0.3 |
±0.05 |
7500 |
|
Three-layer polyester film + one-layer non-woven fabric |
0.42 |
±0.05 |
7500 |
Features of Film-Insulated Winding Wires
High dielectric strength prevents electrical breakdown and short circuits
Thermal stability maintains performance across wide temperature ranges
Mechanical durability withstands handling stress during manufacturing
Moisture resistance protects electrical properties in humid environments
Chemical resistance ensures long-term reliability in harsh conditions
Standardized specifications guarantee compatibility with global equipment
Customization Options
Material
Customizable
Size
Customizable
Shape
Round/Rectangular
Insulation Structure
Customizable
MOQ
Customizable
Manufacturing Process
Polyester (PET): Known for its excellent mechanical strength, dimensional stability, and resistance to moisture and chemicals, polyester films are used in transformers, generators, electric motors, wind turbines, and for cable insulation.
Polyimide (PI): With high resistance to temperatures (up to 300 °C), chemicals, and beta and gamma radiation, polyimide films are used for insulating various devices, especially DC and AC motors, high-power generators, and transformers.
Polypropylene (PP): With its low density and moisture absorption, polypropylene is ideal for producing industrial films used in capacitors and for cable and winding insulation.
Voltage Rating: Higher voltages demand superior dielectric strength and creepage distance
Operating Temperature: Ambient conditions, duty cycle, and cooling method determine required thermal class
Environmental Exposure: Moisture, chemicals, contaminants, altitude, and atmospheric conditions influence material selection
Mechanical Stresses: Vibration, shock, and electromagnetic forces require appropriate mechanical strength
Efficiency Targets: Low-loss conductor materials and optimized slot fill improve efficiency
Ordering Process
Send Us Inquiry → Receive Our Quotation → Negotiate Details → Confirm the Sample → Sign Contract/Deposit → Mass Production →Cargo Ready → Balance/Delivery → Further Cooperation
Payment Terms
T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.
Our Service Highlights
Pre-Sales Consultation & Design Support
Early technical engagement to define requirements and deliver optimized solutions.
During Sales & Project Execution
Transparent project management with controlled production, quality tracking, and on-time delivery.
Warranty Advantage
Minimum 2-year warranty on all products, ensuring reliable and risk-free operation.
After-Sales Support
24/7 technical support with fast response, spare parts availability, and training services.
Long-Term Partnership
Lifelong technical support and upgrade guidance for sustained performance.
Packaging & Shipping
Packaging details:
Shockproof foam/moisture-proof film, professional export cartons/wooden crates/pallets.
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Certificates
We're well-known as one of the leading film-insulated winding wires manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality film-insulated winding wires made in China here from our factory. Contact us for more details.
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