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Transformer Copperbelt

   Strictly in accordance with this standard GB/T18813-2002 standards, and provides the requirements for transformer copper, testing methods, inspection rules, marking, packaging, transportation, storage and contract content. This standard applies to copper wound transformer coil.
Table 1 strip grades, status, and specifications

Trademark

Supply Status

Specifications

Thickness

Width

TU1,T2

M

0.10~<0.50

≤600

0.502.50

≤1000

Note: After consultation with both supply and demand, but also can supply other grades, status, and specifications of the strip

 

Table Strip thickness tolerance  

Thickness

with

≤200

200400

400600

6001000

Thickness tolerance / ±

Ordinary Level

Higher

Ordinary Level

Higher

Ordinary Level

Higher

Ordinary Level

Higher

0.100.20

0.010

0.015

0.010

0.015

0.010

0.200.30

0.015

0.010

0.020

0.015

0.020

0.015

0。300.50

0.020

0.015

0.025

0.020

0.030

0.020

0.050

0.040

0。500.70

0.030

0.025

0.035

0.030

0.040

0.035

0.060

0.050

0.701.10

0.040

0.035

0.045

0.040

0.050

0.045

0.070

0.060

1。101.50

0.050

0.045

0.055

0.045

0.060

0.055

0.080

0.070

1。502.50

0.055

0.050

0.060

0.055

0.080

0.070

0.100

0.090

 

Table 3 and the width of the strip width tolerance

Width

Thickness

≤1.0

1.01.5

1。52.5

Thickness tolerance / ±

Ordinary Level

Ordinary Level

Ordinary Level

Ordinary Level

Ordinary Level

Ordinary Level

≤100

0.2

0.10

0.3

0.20

0.4

0.25

100300

0.3

0.15

0.4

0.25

0.5

0.30

300600

0.5

0.30

0.6

0.40

0.6

0.50

6001000

0.8

0.60

0.8

0.70

0.8

 Note: When the need to request one-way bias, its value should be twice the values ​​in the table.

 

Table 4 The mechanical properties of strip 

Trademark

Status

Tensile strength σb / MPa

Elongation δ10 /%

Vickers hardness HV

Not less than

TU1,T2

M

195

35

4565

 Note: The thickness of less than 0.20 mm of the strip, the test results for reference only.

 

Table 5, the electrical properties of strip

Trademark

Conductivity /% IACS is not less than

Resistivity / ∩ · mm2 / m is not greater than

TU1

100

0.017 241

T2

98

0.017 593

 Note: Choose one of conductivity and resistivity, and in the contract, does not indicate when the test conductivity.

Conductivity = 100% × 0.017241 / resistivity measured.
 

 

 

 

Table 6, the sampling strip

Test items

Sampling provisions

Chapter requirements of Article No.

Test Methods section of Chapter No。

Chemical composition

Take a sample of each furnace

3.2

4.1

Dimensions deviation

Check by volume

3.3

4.2

Mechanical Properties

Take any batch 2 volumes, each taken along the rolling direction of a sample of any

3.4

4.3

Vickers hardness

Volume 2, each batch taking office, take-up a sample of each

3.4

4.3

Electrical properties

Volume 2, each batch taking office, take-up a sample of each

3.5

4.4

Appearance

Check by volume

3.6

4.5

 

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