Paper wrapped transposed conductor uses many varnished copper flat wires,transposed and twisted by stranding cage,and then wraps

Product Instuction
Paper wrapped transposed conductor uses many varnished copper flat wires,transposed and twisted by stranding cage,and then wraps insulating paper.
Application
It's main used in the manufacture of large oil-immersed transformer, reactor and winding of large capacity dry type transformer.
Feature
Can significantly reduce eddy current loss in the process of transformer operation
reduce the weight and volume of the transformer,
good heat dissipation,low cost of transformer
good strength of extension and anti-short circuit ability
Type:paper insulation acetal transposition conductor,paper insulation hot sticky and acetal transposition conductor,paper insulation half-hard acetal transposition conductor,paper insulation half hard hot sticky and acetal transposition conductor,NOMEX insulating paper polyester imide transposition conductor,etc.
Product technical parameters
Transposition quantity
5~63nos
Maximum outside line size(Excluding lapped insulation)
80*26(mm)height-width ratio H/W≤6
Range of single conductor dimension
A:0.90~3.55(mm)B:2.00~13.50(mm)
Transpoition pitch
general requirements: 8b~16bcalculation formula:S=Dπ/nS:transpoition pitchD:minimum diameter of coiln:transposition number of transposed conductor
lining paper
In order to improve the transposition conductor axial tensile strength,To prevent the paint film will be damaged,use a certain thickness of insulating paper as isolation layer between lines,it's named lining paper.Thickness of lining paper:0.13mm
Half hard strength provisions
Half hard copper performance index
Model	Yield strength	Minimum elongation	Maximum resistivity
C1	100~180	20	1/58
C2	180~200	20	1/57.5
	200~220	15	1/57.5
C3	220~260	15	1/57
Insulating paper
Type of insulating paper: cable paper,High density insulating paper,heat insulating paper,dannisong paper,TYVEK etc.
Insulating layer provisions
Insulation standard thickness(mm)	Allowable deviation(mm)
0.45~0.60	±0.06
0.61~1.05	±0.08
1.06~2.00	±0.10
≥2.00	±0.12
Outside line size calculation
Height:H=1/2(n+1)A+Δ
Width:W=2B+Δ
A:Thickness of single conductor
B:Width of single conductor
Δ:Thickness of insulating paper
Executive standard
OB/T 6758.1~4-2007