Kraft Paper Covered Aluminum/ Copper Flat Wire
- Описание
- Product Instruction :
- Product classification and Production Scope
- Materials
- Wrapping method:
- Main Features:
- FAQ
- Packaging & Delivery
- Please Contact Us
Описание
Quick Details
Place of Origin: China Brand Name: XINCHENG
Name: Paper Covered Aluminum/Copper Wire Type: Insulated
Application: oil-immersed transformer windings Thermal Class: 105,220C
Insulation Material: kraft Paper, NOMEX paper, 3M paper, Telephone cable paper / 3M,miki kraft paper, HPI-Green
Shape: round and flat Conductor Type: Solid
Kraft paper covered round (Al &Cu)wire: 1.0mm-7.0mm
Kraft paper covered rectangular AL wire: (a)0.90mm-10.00mm, (b) 2.00-35.00mm
Kraft paper covered rectangular Copper wire: (a)0.90mm-5.60mm, (b) 2.00-16.00mm
NOMEX paper covered rectangular wire: (a): 0.90mm-10.00mm Side(b): 2.00mm-16.00mm
Layer: Single, double, triple, multi-layers or according to your requirement
Conductor Material: Copper or Aluminum
Bobbin: 30kg/50kg/150kg wooden spool or according to customers requirement
Standard: IEC, NEMA, GB, JIS Certifications: SGS, UL, RoHS, ISO
Warranty: 1 year OEM & ODM: Accept
Product Instruction :
Paper covered wire by Electrical Aluminum Pole extrusion die by a certain size or drawn wire after annealing, and then in the aluminum conductor wrapped more than two or two insulating paper (including paper, telephone, cable paper, high voltage cable paper, turn insulation paper) of the winding wire, suitable for oil-immersed transformers and other electrical winding with a similar wire. Produced by the extrusion process electrical bare aluminum wire is wrapped production of the cable wire is the best material.
Paper Covered Aluminum/ Copper Wire uses two layers or several layers as the insulation layer. The wrapping direction of paper is same. And every layer paper twines conductors continually and compactly without wrinkles. Used for oil-immersed transformer.
Telephone Cable Paper covered aluminum wire is used in oil-immersed transformer and other similar electrical coil windings.
Paper wrapped wires are special materials, It is mainly used for oil immersed Transformer, Reactor, Generator and other electric devices.. The application temperature index after impregnation is 105°C. NOMEX wrapping materials whose temperature index is 200°C are used to produce dry type transformers, According to the requirements of users, it can apply phone print paper, cable paper, high tension cable paper, interturn insulation paper and Dane release paper, etc. and Dane release paper, etc.
Telephone cable paper / 3M paper / MIKITOKU covered wire oil immersed transformer winding wire
Telephone cable paper covered aluminum wire, also known as plain paper covered insulated aluminum, according to customer requirements, in the aluminum conductor winding three or more layers of cable paper or telephone paper. Plain paper covered wire is oil immersed transformer coil and similar electrical coil of special material, after the immersion using temperature index of 105℃. According to customer requirements, and can be divided into phone paper, cable paper, high voltage cable paper, paper and other winding insulation.

NOMEX Covered Rectangular/Flat Aluminum Wire:
NOMEX coated Aluminum wire produced by the flat and round, as aluminum are dissolved can be produced.
NOMEX covering corresponds to class H insulation is mainly used in the construction of condensers and capacitors. Main application of it is in shielding of cables in high temp. environment (200°C) such as dry type transformers, military and aerospace cables. NOMEX covered conductors are more effective in condition where temperature resistance and dielectric strength requirements are high.
By extrusion of bare aluminum wire wrapped and NOMEX Paper covered wire, the mechanical performance and electrical performance better, instead of making difficult composite enameled flat wire, suitable for transformer, winding of lifting electromagnet, electric welding machine and other products.
Product Name | Wrapping method | Number of wrapping layers | Insulation thickness / mm | Breakdown voltage ≥ |
NOMEX Paper wrapped wire | Self locking lap joint 1.5~2mm | 1 | 0.12±0.03 | 600V |
Self locking lap joint 1.5~2mm | 2 | 0.24±0.03 | 1500V | |
50%stacking | 1 | 0.22±0.03 | 1200V | |
50%stacking | 2 | 0.40±0.03 | 3000V | |
Lap 1.5mm in opposite direction and wrap | 3 | 0.33±0.03 | 2500V |
Application of NOMEX Paper Covered Aluminum wire :
Mobile Transformer, Traction Transformers, Pole-mounted distribution transformers, Power substations, rectifiers, oil-immersed transformer coil winding.

Product classification and Production Scope
Product classification:
As per Conductor Material: Copper , Aluminum
As per Inner Conductor: Paper wrapped bare Conductor
Insulation thickness: Double paper covered (DPC) or Triple Paper Covered (TPC), According to Customer’s requirements.
Production Scope:
Conductor of Paper wrapped wire:
Kraft paper covered round (Al &Cu)wire: 1.0mm-7.0mm
Kraft paper covered rectangular AL wire: (a)0.90mm-10.00mm, (b) 2.00-35.00mm
Kraft paper covered rectangular Copper wire: (a)0.90mm-5.60mm, (b) 2.00-16.00mm
NOMEX paper covered rectangular wire: (a): 0.90mm-10.00mm Side(b): 2.00mm-16.00mm

Materials
Conductor Materials :
Conductor material is used according to GB/T5584 or DIN EN 13601. Cu-ETP or Cu-OF are used predominantly and if requested, can be delivered with increase strength.
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.
Conductor can be bare rectangle copper or enamel rectangle copper or bare rectangular aluminum
CPR1 | Rp0.2 ≤ 180N/mm2 | tolerance 0 +20% |
CPR2 | 180 < Rp0.2 ≤ 220N/mm2 | tolerance 0 +20% |
CPR3 | 220 < Rp0.2 ≤ 260N/mm2 | tolerance 0 +20% |
Thickness of kraft paper wrapped round or rectangular wire should conform to the following table or mutual consultation between supply and demand requirements:
Kraft Paper Wrapped Round Wire Insulation Thickness Unit: mm
Conductor Nominal Diameter | 1.00≤d≤7.00 | |||||
Nominal Insulation Thickness | 0.3 | 0.45 | 0.8 | 1.2 | 1.8 | 4.25 |
Deviation | ±0.05 | ±0.05 | ±0.10 | ±0.12 | ±0.15 | ±0.30 |
Note: If thickness is between two specification, please take the deviation corresponding to large size.
Kraft Paper Wrapped Rectangular Wire Insulation Thickness Unit: mm
Nominal Insulation Thickness | 0.45 | 0.6 | 0.95 | 1.35 | 1.6 | 1.95 | 2.45 | 2.95 |
Maximum Insulation Thickness (A-a) | 0.57 | 0.74 | 1.14 | 1.56 | 1.84 | 2.23 | 2.77 | 3.32 |
Minimum Insulation Thickness(B-b) | 0.4 | 0.53 | 0.85 | 1.2 | 1.45 | 1.8 | 2.3 | 2.75 |
Bending Standard of kraft paper wrapped Wire
Kraft Paper Wrapped Round Wire Unit: mm
Insulation Thickness | Experimental method | Rod Diameter |
0.30≤σ≤0.80 | Involution | 100 |
1.20≤σ≤4.25 | 150 |
Kraft paper wrapped Rectangular wire Unit: mm
Insulation Thickness | Experimental method | Rod Diameter |
0.30≤σ≤0.80 | Broad Side Bending
|
150 |
1.20≤σ≤4.25 | 200 |
We could offer products of special requirements on conductor size, insulation layer thickness, or wire number of the composite.
Insulation Materials:
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
Telephone cable paper covered aluminum wire, also known as plain paper covered insulated aluminum, according to customer requirements, in the aluminum conductor winding three or more layers of cable paper or telephone paper. Plain paper covered wire is oil immersed transformer coil and similar electrical coil of special material, after the immersion using temperature index of 105℃. According to customer requirements, and can be divided into phone paper, cable paper, high voltage cable paper, paper and other winding insulation.
Advantages Of Our Paper Covered Copper /Aluminum Wire:
- Paper Covered Aluminum/ Copper Wire is a special kind of magnet wires. Its conductors is oxygen-free copper rods or electrical round aluminum rods which squeeze and draw by the certain size of mold. And its insulations is special material.
- Our Paper Covered Aluminum/ Copper Wire uses two layers or several layers as the insulation layer.
- The wrapping direction of paper is same. And every layer paper twines conductors continually and compactly without wrinkles.
- Uses for oil-immersed transformers, reactors and other windings.
- Excellent resistance to abrasion and solvent.
6. Excellent electricity performance.
7. Excellent heat shock and flexibility.
8. High cut-through.
9. Resistance to high voltage in oil.
10. Rise up the filling coefficient of the transformer.
Product Tech Information : | ||
Project Name | Standard | Test tool |
Conductor size and R corner radius | Follow standard of GB/T7673.1-87 | Micrometer and R type |
Bend | The specimen is not cracked, no crack, no obvious sticking out of the paper according to the standard curve. | Experimental round rod and flat wire bending apparatus |
Specification: (5.00*13.00 mm) | |||||
Test subject | Technical requirement | Test result | |||
Appearance | Tightness, uniformity, smooth | Qualified | |||
Size | a side | 5.00mm+0.05mm | 4.97mm | ||
b side | 13.00mm+0.10mm | 13.01mm | |||
Radius | 1.00mm±25% | Qualified | |||
Film thickness | 0.40-0.54 mm | 0.47mm | |||
Maximum A side size | 5.59mm | 5.45 mm | |||
Wrapping | Overlapping | >2.0mm | 3.0mm | ||
Gap | < 2.0mm | —- | |||
Elongation | > 17% | 31% | |||
Resilience | < 5º | —- | |||
Flexibility & adhesiveness | No crack, No rip | Qualified | |||
Conductor resistance(20º C) | ≤0.0004806 Ω/m | 0.0004291Ω/m | |||
Appraisal result | Qualified | ||||
Remark | |||||
Technical Parameters(AL) : | |
Test | Standard requirements |
Specification | Round wire:Ø1.0 mm—Ø7.0 mm |
Flat wire:a side 0.90—10.0mm;b side 2.0—35.0mm | |
Resistivity | 0.02785Ω.mm2/m |
Breakdown voltage | 1500V |
Wrapped layer | 6 times bare wire diameter, test rod paper cladding is not loose |
Appearance | Wrap firmly, closely, evenly, without wrinkles |
Packaging | Wood tray packaging, length can be customized |
Wrapping method:
At present, there are mainly four wrapping methods adopted by users:
- all gaps of the inner layer are wrapped, and the outer layer is overlapped
- inner and outer two-layer stack package, intermediate gap package
- all overlapping wrapping
- outer two-layer inlay package and other gap packages
Our company can adjust the wrapping method according to the user’s requirements. The paper layer can be wrapped in the same direction or in different directions.
Main Features:
Main Features:
1.Papers are applied with butt intercalation in the following manners :
2 papers- double butt intercalation- advanced 40-60%.
3 papers- triple butt intercalation-advance 28-38%.
Papers are lapped in the following manners :
One Paper applied with 47-49% overlap-equivalent to 2 Papers.
One Paper applied with 64-66% overlap-equivalent to 3 Papers.
Two Telephone Cable Papers each applied in one of the above manners.
Note: If the maximum dimensions do not exceed the maximum size conductor with the specified maximum insulation thickness, insulation thickness allowed to exceed the specified value.
FAQ
Q : How about your company’s annual production capacity?
A : Our Company’s annual production is about 8,000 tons.
Q :What’s your company’s product scope?
A : We have many kinds of products ,such as enameled aluminum wire, enameled cooper wire, paper covered magnet wire, fiber glass
covered magnet wire and other aluminum/cooper magnet wire products.
Q :What’s the temperature-resist grade of your enameled aluminum wire?
A : We produce the thermal class of enameled aluminum wire from 130 to 220 Centigrade.
Q: How many kind of spools size ?
A:PT4, PT10, PT15, PT25,PT30, PT35, PT60, PT90,PT200 wooden spools PT-500 and etc.
Q : What is specifications of enameled wire your company can produce?
A: 1.Enameled round wire: 0.25mm-6.0mm
- Enameled flat aluminum wire: a: 1-10mm, b: 2-22mm
- Enameled rectangular wire: Side(a): 1mm-10mm, Side(b): 2mm-16mm
- Kraft paper covered round (Al & Cu)wire: 1.0mm-7.0mm
- Kraft paper covered rectangular AL wire: (a)0.90mm-10.00mm, (b) 2.00-35.00mm
- Kraft paper covered rectangular Copper wire: (a)0.90mm-5.60mm, (b) 2.00-16.00mm
NOMEX paper covered rectangular wire: (a): 0.90mm-10.00mm Side(b): 2.00mm-16.00mm
- Fiberglass covered round wire:1.00mm-8.00mm
- Fiberglass covered rectangular (Al & Cu) wire: (a) 0.90mm-10.0mm,(b)2.00mm-22.00mm
Q : What’s the temperature-resist grade of your enameled wire?
A: We produce the thermal class of enameled wire from class130 to class220
Q : Could you provide the free samples?
A : Yes, We could provide the free samples within 0.5kg. You only need undertake the express charges.
Q : What’s the price of your enameled aluminum wire?
A : Please sent an email to our office [email protected] or call whatsapp /mobile 0086-13752439076, our salesman will reply you as soon as possible.
Packaging & Delivery
Packaging Details
Paper Covered Aluminum Wire Inner packing: in different wooden spool, such as 30/50/150kg wooden spool, or according to your wire diameters
Outer packing: wooden spool and and wooden case or according customers’ special requirement.
Port: Qingdao/Shanghai/Tianjin.


Please Contact Us
Miss: lydia
Mob: 86-13752439076 Fax: 86-22-60863016
WeChat :86-13752439076 WhatsApp: 86-13752439076