NOMEX paper covered wire is a wire extruded by an electric round copper rod or an electric round aluminum rod through a mold of a certain specification, and then wound by a T410 type NOMEX insulating paper produced by DuPont of the United States, mainly used for transformers. , welding machine, electromagnet or other similar electrical equipment product windings. The bare copper (aluminum) wire produced by the extrusion process is the most ideal material for the production of NOMEX paper covered wire.
Conductor of Paper wrapped wire
Bare wire Round Wire:Φ1.00mm—Φ5.00mm
Rectangular Wire thickness a:1.00mm—5.60mm
Conductor of Composite wires
Max wrapping layers once: 24 layers for paper covered wire
4 layers per wire and 16 layers outside for composite wires
We could offer products of special requirements on conductor size, insulation layer thickness, or wire number of the composite.
Resistivity :Soft copper wire ≤ 0.017241Ω•mm²/m at 20°C
Soft aluminum wire ≤ 0.028000Ω•mm²/m at 20°C
Proof stress Rp0.2:soft < 100 N/ mm2,Semi-hard 100-300 N/ mm²,
The deviation of Proof stress Rp0.2 could be +0-20 N/ mm².
●NOMEX paper covered wire technical indicators (enterprise standard)
NOMEX paper is made of 2 mil T410 type NOMEX paper produced by DuPont of the United States.
Number of layers
Insulation thickness mm
Breakdown voltage ≥
NOMEX paper covered wire
The opposite direction overlaps 1. 5m wrapping
●NOMEX paper envelope advantages
Because of the high electrical, chemical and mechanical integrity of NOMEX paper, it is very flexible, flexible, tear resistant, moisture and abrasion resistant, and very resistant to acid and alkali corrosion, not affected by insects, molds and fungi. Destruction, it is compatible with all kinds of varnishes, adhesives, transformer fluids, lubricants, and refrigerants. Other NOMEX papers have high heat resistance and maintain the original insulation properties even at temperatures up to 220 ° C. Use NOMEX paper bags. Line transformers can bring many economic, environmental and safety benefits to customers.
●Reduce costs, reduce size, and reduce weight
Transformers using NOMEX products can be designed to 180 °C, requiring less wires and cores, reducing size and weight, thereby reducing capital costs and facilitating installation. Small cores also mean no-load losses. small;
The transformer winding uses NOMEX paper covered wire to maintain excellent electrical and mechanical properties throughout the life of the transformer. NOMEX paper is resistant to shrinkage, compression, elasticity and unfabrication, and is resistant to thermal shock, thus ensuring transformer coil construction. Tight, no cracks, and NOMEX insulation paper is not sensitive to temperature and dust, improving transformer reliability.
●Increase spare capacity
NOMEX paper has a high heat resistance temperature and maintains the original insulation performance even at temperatures as high as 220 °C. The transformer is designed to use Class C 220 ° C insulation material as Class H 180 ° C, which can cope with emergency overload load and unexpected expansion, which can greatly reduce the backup plan.
●Good environmental performance
NOMEX insulation material has stable chemical properties, safety, flame retardancy, non-toxicity and radiation resistance. It will not release toxic gases even in the event of fire; it does not reflect with solvents, and it is resistant to acid and alkali corrosion. When its service life is over, it is easy to recycle, resources can be reused, waste can be degraded, and it will not pollute the environment. It is an environmentally-friendly high-tech product.
Wrapping materials: Power Cable Paper, High Density Insulation Paper, heat-resistant insulating paper, clupak paper, Nomex 410, all kinds of self-adhesive paper and other special insulation materials