Mica Tape Wrapped Wire

Mica Tape Wrapped Wire is a premium inorganic composite high-temperature magnet wire specially developed for ultra-high voltage, fire-safe and long-service-life power equipment. The conductor adopts high-purity copper or self-produced 1350 high-purity aluminum bare wire as the core; the insulation layer is formed by multi-layer half-lap spiral wrapping of high-purity phlogopite / muscovite mica tape, reinforced by alkali-free glass fiber cloth and solidified via high-temperature silicone resin curing process.

Different from conventional enamel, PET or PI film insulated wires which will carbonize, crack or lose insulation under ultra-high temperature and continuous corona erosion, the inorganic mica insulation structure maintains stable dielectric performance under extreme thermal and electrical shock. The integrated mica-glass fiber composite layer forms an integral fire-resistant shielding barrier, which can keep circuit integrity for a long time under flame impact. It is the standard designated winding wire for large generators, railway traction motors, offshore wind power equipment and fire-resistant special transformers that require 155℃/180℃/240℃ continuous long-term operation.

All raw mica tape materials are inspected in batches before production; the whole wrapping line adopts constant-tension lapping control to eliminate hidden dangers such as missing wrap, loose layers and uneven thickness, fundamentally solving the industry common pain points of partial discharge breakdown and short service life of high-voltage windings.

Pain Point 1: Ordinary enamel/film wire suffers corona erosion breakdown under long-term high voltage

Our Solution: Inorganic mica crystal layer has natural anti-corona characteristics, no organic material carbonization failure; multi-layer staggered wrapping eliminates air gaps between layers, suppresses partial discharge, stable operation under 6kV~30kV high voltage for decades, greatly reducing generator overhaul frequency.

Pain Point 2: Equipment catches fire after insulation aging under overload high temperature

Our Solution: Mica is natural non-flammable inorganic mineral, will not burn or drip molten material when overheated; forms dense fire-resistant isolation layer to avoid short-circuit fire spread, fully meets fire-resistant transformer and rail transit safety certification requirements.

Pain Point 3: Conventional insulation cracks after frequent thermal cold cycling

Our Solution: Glass fiber cloth reinforces mica tape to improve tensile & bending resistance; high-elastic silicone adhesive maintains interlayer bonding under -40℃ ~ 240℃ alternating temperature, no delamination or cracking after thousands of thermal cycles.

Pain Point 4 Wind & traction motor vibration causes insulation wear & turn-to-turn short circuit

Our Solution: Constant-tension precision lapping makes insulation tightly fit conductor, anti-friction mechanical strength far higher than single enamel wire; integrated composite structure resists long-term vibration abrasion in moving equipment.

Pain Point 5: Aluminum winding ordinary insulation has short service life under oil & damp environment

Our Solution: Mica composite insulation has excellent moisture resistance and transformer oil compatibility, matched with our self-produced high-purity aluminum conductor to realize lightweight long-life winding scheme for large reactors & transformers.

1. Extreme Ultra-Wide Temperature Endurance

Supports three thermal grades up to 240℃ continuous steady operation. Even under instantaneous overload temperature surge, the insulation layer will not lose dielectric strength, suitable for heavy-load traction motors and peak-shaving generators with unstable load.

2. Inherent Grade V-0 Fireproof Safety Barrier

Pure inorganic mica substrate cannot support combustion. In case of equipment short-circuit ignition, the mica layer maintains complete insulation isolation for 90~180 minutes, effectively blocking fire propagation, complying with subway, offshore platform and power station fire safety mandatory standards.

3. Leading Corona & Partial Discharge Resistance

The layered mica crystal structure disperses electric field uniformly, avoids local electric field concentration; ultra-low partial discharge volume, solves the fatal breakdown defect of organic insulation materials under long-term high-frequency & high-voltage alternating current, exclusive generator-grade insulation performance.

4. Ultra-Long Thermal Aging Service Life

After 10,000 hours continuous high-temperature accelerated aging test, the insulation strength attenuation is less than 15%. Compared with common PI film magnet wire, the service life of wind power and large generator windings is increased by more than 60%, reducing customer equipment maintenance and replacement cost.

5. Dual Conductor Customization (Copper / Self-Supplied Aluminum)

Copper version for high-efficiency, low-loss high-power generators; lightweight aluminum version self-produced in our bare aluminum workshop, cutting overall winding weight and raw material investment for large-volume transformer & reactor projects, one-stop matching different customer cost and performance demands.

Stage 1: Self-Produced Bare Aluminum / Copper Conductor Preparation

• Metal rod raw material feeding → Multi-stage tungsten die precision drawing
• 360–400℃ recrystallization continuous annealing to boost winding flexibility
• Eddy current full surface defect inspection, eliminate wire scratch & internal inclusion
• Qualified conductor spool storage for mica wrapping process

Stage 2: Mica Tape Composite Insulation Wrapping & Curing

• High-quality phlogopite/muscovite mica tape feeding, tension real-time closed-loop control
• Automatic spiral half-lap multi-layer wrapping (30%/50% overlap customizable)
• Glass fiber cloth reinforcing layer synchronous composite wrapping
• High-temperature tunnel furnace silicone resin integral curing molding
• Online insulation thickness & winding tightness real-time detection

Stage 3: Finished Comprehensive Performance Testing & Packaging

• Dielectric strength breakdown test, partial discharge detection
• Thermal cycle aging simulation test, flame resistance spot check
• Dimension sorting, digital fixed-length metering
• Moisture-proof anti-collision spool winding & export packaging

Solution 1: Large Hydraulic / Wind Power Generator Stator Winding

• Matching Product: H Class / 240℃ Mica Tape Wrapped Round Wire
• Solving Demands: Long-term 10kV+ high voltage operation, 20 years+ service life, anti-corona, anti-altitude damp environment; applied for onshore & offshore wind turbine generators, hydroelectric large unit main windings.

Solution 2: Railway & Metro Traction Motor Coil

• Matching Product: F/H Class Flat Mica Wrapped Wire
• Solving Demands: Frequent start-stop thermal shock, vehicle vibration abrasion, fire safety certification mandatory; fully compatible subway, high-speed train, locomotive traction motor design standards.

Solution 3: Fire-Resistant Safety Transformer for High-Rise Building & Nuclear Auxiliary Power

• Matching Product: Double-layer mica wrapped fireproof grade wire
• Solving Demands: Must maintain circuit integrity under fire accident, anti-overload high temperature, low smoke non-toxic insulation; used for building fire control power transformers, nuclear island auxiliary reactor windings.

Solution 4: Offshore Platform & Marine Power Equipment

• Matching Product: Muscovite mica reinforced anti-corrosion version
• Solving Demands: Salt fog damp corrosion resistance, wide temperature fluctuation, flame retardant; applied for marine generator, offshore wind box transformer internal winding.

Solution 5: Heavy Industrial High-Voltage Reactor

• Matching Product: Aluminum core mica wrapped wire (Lightweight cost-saving scheme)
• Solving Demands: Large winding volume, cost control, long-term oil immersion stability; matched with our full series aluminum transposed cable supporting raw material system.

Packaging Standard

• Inner Winding Carrier: Heavy-duty solid wooden spools / Thickened tapered plastic spools (anti-deformation for flat wire)
• Inner Protection: Each spool fully wrapped with anti-static moisture-proof PE film, foam separators to avoid insulation scratch during stacking
• Export Outer Packing: IPPC fumigated wooden cases, Euro standard fumigated pallets
• Domestic Packing: General wooden pallets with stretch film full wrapping

Order & Shipping Terms

• MOQ: 1 Ton
• Standard Production Lead Time: 2–4 Weeks
• Urgent Sample / Small Batch Priority Delivery: 7–10 Working Days
• Global Transport Modes: Sea freight, air freight, full-truck land transport, combined container door-to-door delivery, covering Asia, Europe, North America, Middle East offshore project markets

Mica tape wrapped wire, fireproof generator magnet wire, corona resistant high voltage winding wire, 240℃ high temperature mica insulated wire, rail transit traction motor coil wire, offshore wind power winding conductor, fire resistant transformer aluminum wire

Hot Tags: mica tape wrapped wire, China mica tape wrapped wire manufacturers, suppliers, factory, Glass Fiber Wrapped Wire, non-woven, Paper Wrapped Wire, paper wrapped wiring, Polyester Film, wrapped wire