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Judian New Materials

Paper covered wire

Product description:
Paper-covered wire is a wire made of oxygen-free copper rods or electrical round aluminum rods that are annealed after being extruded or drawn by a certain specification die, and then wrapped with two or more layers of insulating paper on the copper (aluminum) conductor (including Telephone paper, cable paper, high-voltage cable paper, turn-to-turn insulation paper, etc.) are suitable for winding wires of oil-immersed transformer coils and other similar electrical appliances. The bare copper (aluminum) wire produced by the extrusion process is an ideal material for the production of paper-covered cables.
Executive standard:GB/T7673-2008

Production range:Copper flat wire
Narrow side size a: 0.90mm—5.60mm
Wide side size b: 2.00mm-16.00mm
Aluminum flat wire
Narrow side size: a: 1.00mm—8.00mm
Wide side size: b: 3.00mm—25.00mm
Copper aluminum round wire
Nominal diameter of conductor: φ1.7—φ8.0
If the specification exceeds the above range, please contact us

Material:
The aluminum flat wire should meet the requirements of GB5584.3-2009, and the resistivity at 20°C should not be greater than 0.0280Ωmm2/m
The rectangular copper wire should meet the requirements of GB5584.2-2009, and the resistivity at 20°C should not be greater than 0.017241Ωmm2/m
The insulation thickness of the paper-covered round (flat) cable shall meet the following requirements or be negotiated by the supplier and the buyer:
Cable paper-covered round wire unit: m

Related technical parameters of paper covered wire:

Model	Name	Model	Name
Z	Cable paper or telephone paper covered copper wire	ZB	Cable paper or telephone paper covered copper flat wire
ZL	Cable paper or telephone paper covered aluminum flat wire	ZLB	Cable paper or telephone paper covered aluminum flat wire
ZA	500KV transformer turn-to-turn insulated copper round wire	ZAB	500KV transformer turn-to-turn insulation paper-coated copper rectangular wire
ZAL	500KV transformer turn-to-turn insulated copper flat wire	ZALB	500KV transformer turn-to-turn insulation paper-coated aluminum flat wire

Insulation thickness of paper-covered round wire
Nominal 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

Insulation thickness of paper-covered rectangular wire
Nominal 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 (A—a)	0.40	0.53	0.85	1.20	1.45	1.80	2.30	2.75

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