According to IEC 60641-3-1 Type B 3.1

Characteristic features

100 % Electrical grade Sulphate Pulp
Natural –coloured
Made of Umang Transformers Board
High Purity and oil absorption
Insulation class A ( 105ºC)
Good compatibility with liquid dielectrics strength


Insulation of winding in Transformers
Split angle ring A (1x300º) + snout (1x60º)
Angle ring in segments B (5x60º) + snout (1x60º)



Umang Cylinders are available in the following shapes: -

Cylinder 0

Without axial chamfer

Cylinder A

Axial chamfer one sided outside

Cylinder B

Axial chamfer one sided inside

Cylinder C

Axial chamfer both side, Once inside, Once Outside

Cylinder D

Axial chamfer both sides outside

Cylinder E

Axial chamfer both sides inside


Technical specification