Tianjin Ruiyuan Electric Material Co,.Ltd
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PAPER COVERED COPPER WIRE MAGNET LITZ WIRE FOR WINDIGN
The manufacture process is as follows: Strips of mutual insulated round copper wire transpose, strand, roll into rectangular section wire in the same direction at certain pitch, then insulating film and insulating composite materials is wrapped from inside to outside.
Here are three types:
1.Paper insulated polyvinyl-acetal enameled Continuously Transposed copper wire
2.Paperless Insulated Netting-type Continuously Transposed copper wire
3.Heat Resistant Continuously Transposed enameled copper wire
FEATURES
1.Reduce additional circulation current loss
2.Eddy-current loss caused by leaking magnet field
3. Improve the mechanical strength of coil
APPLICATION
Coil winding of large oil-immersed power transformer and reactor, large capacity dry type transformers.
SPECIFICATION
| Test Item | Technical Requirement | Test Result | ||
| Appearance | Bare Stranded Wire | Smooth Surface, no scratch, oil pollution, oxide layer or glitch, strand should be close and tidy and no broken strand or missing strand | Qualified | |
| Paper Cover | Paper cover should be tight and uniform, smoothly winded on the bare stranded wire. No cracking, wrinkle, and leaking | Qualified | ||
| Size | Dia. of stranded wire | 10.00-10.20mm | 10.10mm | |
| Overall diameter | 15.70-16.70mm | 16.20mm | ||
| Wrapping Sort | Overlap width | innermost layer | ≥10mm | 12mm |
| Outmost Layer | ≥10mm | 12mm | ||
| Gap Width | _ | _ | ||
| DCR VALUE | ≤0.01724Ω(at 20℃ mm²/m) | 0.017068Production | ||
| Elongation | ≥25% | 30.8% | ||
| Bending | Diameter of pole is 112mm,, no cracking, leak, no obvious warping. | Qualified
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| Remark | ||||