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Paper covered rectangular copper wire
The paper covered rectangular copper wire is made of an oxygen-free copper rod and is extruded or drawn by a mold of a certain specification. Then wrap two or more layers of insulating paper on the copper conductor(including telephone paper, cable paper, high voltage cable paper, inter-turn insulation paper, etc). The resulting winding group is called an paper covered rectangular copper wire. Suitable for oil immersed transformer coils and other similar electrical windings. The bare copper wire produced by the extrusion process is the most ideal material for producing paper covered rectangular copper wire.

paper covered rectangular copper wire

Diameter Range (mm): Round copper wire: 2.0-10mm; flat copper wire: a: 1-10mm; b: 3-35mm;
Heat resistance rating (℃): 155,180,200,220
Standard: UL,SGS,ROHS;ISO
Package: 30kg/50kg/150kg,wooden spool, and according to customer requirements.

paper covered rectangular copper wire

Paper covered round copper wire insulation thickness
Insulation thickness
(mm)
0.30 0.45 0.80 1.20 1.80
Allowable deviation
(mm)
±0.05 ±0.05 ±0.10 ±0.12 ±0.15
paper covered rectangular copper wire insulation thickness
Insulation thickness
(mm)
0.45 0.60 0.95 1.35 1.60 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)
0.40 0.53 0.85 1.20 1.45 1.80 2.30 2.75

What are the advantages of the paper covered rectangular copper wire we produce:

paper covered rectangular copper wire

1.The surface is smooth and flawless.

2.Use two or more layers of paper to make the insulation layer. The paper is evenly wrapped in one direction and tightly wrapped around the bare copper wire without wrinkles.

3. We produce a wide variety of paper covered copper wire, such as cable paper covered copper wire, NOMEX paper covered copper wire, and so on.

4. The paper covered rectangular copper wire we produce is sold at home and abroad all the year round. It has good mechanical properties and heat resistance and is well received by the market. For the inspection of paper covered wire, we have a strict process, the quality requirements of the produced paper covered wire are as follows:

(1) There should be no defects in the paper tape. There should be no wrinkles or cracks. The paper tape should not be exposed at the overlap of the paper. The insulation of the tape joint and the insulation repairing area should be large, but the length should not exceed 500mm. (If there are defects and cracks in the production process, it will affect the insulation performance of the paper covered copper wire, resulting in insufficient partial pressure, discharge, transformer breakdown and explosion. However, if the thickness of the insulation is too thick, the external dimensions will be too large, the overall coil size will be large after winding the transformer, and the transformer casing is difficult to assemble.)

(2) The insulation layer should be tightly, evenly and flatly wrapped around the wire. Due to the wire joint, the local joint caused by the paper joint should not exceed the maximum outer limit. (ie bare wire size plus deviation plus insulation thickness plus deviation and).

(3) The insulating paper tape must be wrapped continuously without any lack of paper layer, and the paper tape should be free from damage.
 
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