Duct spacing

According to IEC 60641-3-1 Type B 5.1

Technical Specification

Characteristic features

100 % Electrical grade Sulphate Pulp
Natural –coloured
Made of Umang Transformers Boards components with high grade paper
High Purity and oil absorption
Insulation class A ( 105ºC)
Good compatibility with liquid dielectrics strength
One side BL/U coated or uncoated


Umang duct spacing can be used for main and cooling ducts in oil filled distribution transformers



 Umang duct spacing is available in the following shapes: -

Duct Spacing C

Umang Transformer Boards MD Rectangular Duct

Duct Spacing HD

Umang Transformer Boards HD Rectangular Duct


Technical specficaton