Transformer paper

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.