SIGMALEK 4.3       

  |

SIGMALEK 2.1

 
Transformer Insulating Pressboard
Transformer Insulating Precompressed Pressboard
Moulded Components
Corrugated Component
Machined Components
Insulation Press Paper
Insulation Kraft Paper
Insulation Crepe Paper
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                    TRANSFORMER INSULATING PRESSBOARD 
 
                                       SPECIFICATIONS
 

Finish: Matte/ Smooth Calendered

        PROPERTIES

TYPICAL VALUES

SIGMALEK 4.3
(Ref. Standard : IEC - 60641-3-1, B4.3)

COLOUR

Grey

DENSITY, Range (gm/cc)

0.90 - 1.10

TENSILE STRENGTH, min (MPa)
MD / CD 

< 1.6 mm 
> 1.6 - 3.0 mm 
> 3.0 - 6.0 mm  



42 / 27
35 / 25
25 / 20

ELONGATION, min (%)
MD
CD 


5.5
6.5

SHRINKAGE, max (%)
MD
CD
PD


1.0
1.5
6.0

MOISTURE CONTENT, max (%)

8.0

ASH CONTENT, max (%)

1.0

CONDUCTIVITY OF AQUEOUS EXTRACT, Max (mS/m)



8.0

pH of AQUEOUS EXTRACT, Range

6.0 - 9.0

OIL ABSORPTION, min (%)


25.0
ELECTRICAL STRENGTH, min (kV/mm)
in Air / Oil
0.8 mm 
1.0 mm 
1.5 mm
2.0 mm
3.0 mm
4.0 mm 
5.0 mm
6.0 mm 


7.5 / 38
7.5 / 38
7.5 / 38
7.0 / 32
7.0 / 32
6.5 / 25
6.5 / 25
6.5 / 25