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Tube paper-bakelite

Order
Amount

 Tube paper-bakelite

 The tube paper-bakelite represents the layered material made by a method of continuous winding preliminary impregnated phenolformaldehy de by pitch paper roving with subsequent it calcification.

 Tubes reeled up paper-bakelite are intended for work in transformer oil and on air at temperatures (15-35 0 C, relative humidity of 45-75 % and frequency of a current of 50 Hz. A class thermal-life characteristics 120°С.

 TUBE paper-bakelite, CHARACTERISTICS:

 

The name of parameters

Unit of measure

Tubes

Breaking point at a static bend at (15-35) °С 45-75 %, not less

МPа

100

Breaking point at compression along an axis at (15-35) °С 45-75 %, not less

МPа

40

Breaking point at a stretching at (15-35) °С 45-75 %, not less

МPа

 

60

 

Specific volumetric electric resistance, not less at (15-35) °С 45-75 % after air-conditioning 24ч/23°С/93 %

Оhm х m

 

5x1010 

5x107

 

Test pressure in a direction in parallel layers of M (90°С), transformer oil

 

During 1 minutes

 

During 5 minutes

kVeff

25

-

 

The test pressure in a direction is perpendicular to layers of M (90°С), transformer oil during 1 minutes during 5 min for walls t. 2-10 mm

-

20

 

Penetrative pressure in parallel layers at a variable pressure of frequency of 50 Hz transformer oil at 90 оС, not less

-

-

Tangent of a corner of dielectric losses at frequency of 50 Hz, no more at (15-35) °С 45-75 %

 

At a pressure 103 kV

 

At a pressure 73 kV

%

 

0,025

 

Density, not less

g/sm3

1,05


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