Transformer board is a specialized cellulose-based insulation material designed for use in oil-immersed transformers. Free of strains, good flatness, highest mechanical and electrical strength. It is suitable for strips, cylinders, spacer, plates and structural supports of oil-liquid of distribution transformers.

• Sheet size: 2000mm x 1000mm for 0.50mm – 1.50mm;
• 2000mm x 1000mm or 3000mm x 1000mm for 2.00mm – 3.00mm;

Property		Unit	Unbleached sulphate pulp
Thickness deviation	≤0.5mm	%	≤±10.0
	0.5mm -1.6mm		≤±7.0
	1.6mm		≤≤±7.0
Apparent density	≤0.5mm	g/cm3	1.10 -1.25
	0.5mm -1.6mm		1.00 - 1.25
	1.6mm - 3.0mm		1.00 - 1.25
Tensile strength MD	0.5mm - 3.0mm	N/mm2	≥90
Tensile strength CMD	0.5mm	N/mm2	≥35
	0.5mm - 3.0mm		≥50
Shrinkage	MD	%	≤1
	CMD		≤1.4
	Thickness deviation		≤6
Elongation	MD	%	≥3.5
	CMD		≥4
Ash content		%	≤1
PH of aqueous extract		-	6 - 9
Oil absorption	1.0mm - 1.6mm	%	≥9
	1.6mm - 3.0mm		≥9
	3.0mm - 8.0mm		≥9
Conductivity of aqueous extract	≤1.6mm	mS/m	≤10
	1.6mm - 3.0mm		≤10
Electrical strength in oil	0.5mm - 1.0mm	kV/mm	≥35
	1.5mm - 2.0mm		≥30
	2.5mm		≥27
	3.0mm		≥24
Moisture content	0.1mm - 0.5mm	%	6 - 10
	0.5mm - 1.5mm		4 - 9
	1.5mm - 3.0mm		5 - 9