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Transformer paper

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Transformer paper

 The transformer paper of ГОСТ 24874-91 is made following marks:

TВ-120 transformer high-voltage a class thermal-life characteristics And (working temperature up to 105С). It is applied to isolation of transformers.

 ТВУ-085-Transformer high-voltage condensed a class thermal-life characteristics A (working temperature up to 105С). It is used for isolation armature the wires applied in transformers and reactors with oil filling.

ТН-120-Transformer thermal-life characteristics a class thermal-life characteristics Е (working temperature up to 120С). It is applied to isolation of windings of transformers of a class of a pressure up to 154 кV, inclusive.

 ТВНУ-085-Transformer high-voltage thermal-life characteristics condensed a class thermal-life characteristics Е (working temperature up to 120С). It is used for isolation armature the wires applied in transformers and reactors with oil filling.

 Width of a paper:

 Marks of TВ-120 and ТН-120 — 500, 670, 750, 1000mm;

 Marks ТВУ-085 and ТВНУ-085-500, 640mm.

 The paper of marks ТВУ-085 and ТВНУ-085 is made calender bowl.

Characteristics:

 

The name of a parameter

Norm for a paper of mark

 
 

ТВ-120

ТВУ-085

ТН-120

ТВНУ-085

 

1. Thickness, a micron

120+7

85+5

120+7

 

85+5

 

2. Density, g/sm3

0,08+0,05

1,05+0,05

0,08+0,05

1,05+0,05

 

3. Destroying effort, Н (kgs), not less:

 

In a machine direction

 

In a cross-section direction

140(14)

65(6,5)

 

125(12,5)

53(5,3)

 

140(14)

65(6,5)

 

120(12,0)

53(5,3)

 

 

4. Relative lengthening in %, not less

 

In a machine direction

 

In a cross-section direction

2,0

5,5

 

2,0

5,0

 

2,0

5,0

 

2,0

5,0

 

 

5. A mass fraction of iron in %, not less

0,004

 

0,004

 

-

-

 

6. A mass fraction of nitrogen in %, not less

-

-

0,7

0,7

 

7. рН a water extract

6,0-7,5

 

6,0-7,5

 

7,0-9,0

 

7,0-9,0

 

 

8. Specific electric conductivity of a water extract, MkSm/sm

 

At the module 1:50

 

At the module 1:20

 

20

40

 

 

20

40

 

-

-

 

-

-

 

 

9. A tangent of a corner of dielectric losses at 100С, no more

0,0025

 

-

-

-

 

10. Electric durability of a dry paper, kV/mm,not less

7,5

 

9,0

 

7,5

 

9,0

 

 

11. A mass fraction of ashes in %, no more

0,4

 

0,45

 

0,9

 

0,9

 

 

12. Humidity in %, no more

8,0

 

8,0

 

8,0

 

8,0

 

 

13. Air permeability, m3/min ( mkm/Pa-s)

12-30

 (0,2-0,5)

 

3-6

(0,05-0,1)

 

3-30

(0,05-0,5)

 

3-30

(0,05-0,5)

 

 

 The transformer paper is delivered in rolls in diameter 550-800mm.


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