This workshop produces single wire and multiple wire lapped with different kinds of insulated materials. The workshop area is 2400 m2.
★Main products: There are three types of lapping: overlapping, interlocked lapping and open lapping, and all of these lapping methods can be applied to the flat and edgewise wire.
★Main equipments: 15 single paper lapping machines.7 multiple wire machines (of which, two can lap double conductors, four can lap triplicate conductors and one can lap quadruple conductors).
★Annual capacity: 5000 tons flat wire,5000 tons multiple wire.

Product Introduction

Paper covered wires is a type of winding wire made by oxygen-free copper rod or electric round aluminum rod which drawn or extruded by dies with special size, then wrapped with special insulation materials.     Multiple wires are made by a number of winding wire or copper wire,aluminum wire according to required arrangement, then wrapped with special insulation materials.Mainly be used in windings of oil-immersed transformer、reactor、and other electric devices.

Product Type

Paper covered rectangular copper(aluminum)conductor、Paper covered rectangular hardened copper conductor、Special insulation materials covered rectangular copper(aluminum)conductor、Multiple hardened copper conductors、Polyvinyl acetal enameled over coated bondable epoxy resin multiple conductors、Special insulation materials covered multiple copper(aluminum) conductors.

Manufacturing Scope

Paper covered rectangular copper、aluminum conductor:
Thickness a:1.00mm-10.mm       Width b:3.00mm-25.00mm
Paper covered round copper、aluminum conductor:2.00mm≤conductor diameter d≤6.00mm
Multiple copper、aluminum conductor:Thickness a:1.00mm-4.00mm     Width b:5.00mm-20.00mm
Rectangular hardened copper conductor:Thickness a:1.00mm-2.50mm     Width b:5.00mm-15.00mm
Polyvinyl acetal enameled over coated bondable epoxy resin conductor:
Thickness a:1.0mm-2.50mm       Width b:5.00mm-15.00mm

C1 Rp0.2(>100~180)N/ mm2
C2 Rp0.2(>180~220)N/ mm2
C3 Rp0.2(>220~260)N/ mm2

Conductor Materials 
The resistivity of soft copper is not more than 0.01724Ω·mm2/m at 20°.According to different mechanical strength, below proof stress Rp0.2 is recommended:
C1 Rp0.2(>100~180)N/ mm2
C2 Rp0.2(>180~220)N/ mm2
C3 Rp0.2(>220~260)N/ mm2

Wrapping Insulation Materials

Kraft paper、High density  paper、Thermally up-graded paper、Nomex410

Structure Design

Multiple conductors are made of two or more rectangular winding wires according to arrangement that wide border or narrow border overlapped. Multiple conductors could be divided into flat wise、side by side、and edge wise.