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Transformer Board Characteristics
Transformer Board (Press Board T-IV) is a type of electrical insulation paper made of cellulose fibers. Characteristics include:
Superior compression under static and dynamic loads- Excellent flexural strength
- Good mechanical and electrical strength
Applications for Transformer Board
- Spacers
- Plates
- Washers
- Support strips
- Gap barriers
Contact a Dielectric Manufacturing knowledge expert to discuss the use of transformer board for electrical insulation. Call 800-367-9122 or email sales@dielectricmfg.com.
We also are a distributor of transformer board material. Contact us about fulfilling your material needs and to get a quote.
Dielectric Manufacturing, Richfield, Wisconsin USA dielectricmfg.com Transformer Board Material Properties Provided By Dielectric Manufacturing, Richfield, Wisconsin
Property Parameter units LB 3.1A.1+ LB 3.1A.2++
Flexural Strength MD MPa 115 130
CMD 105 120
Compressibility C % 2.7 2.2
C rev 83 84
InternalPly Strength Dry 23° C MPa 112 115
Dry 120 °C retention % <79 73
Oiled 23 °C retention 96 97
Aged 23 °C retention 94 97
Apparent Density g/cm8 1.24 1.30
MoistureContent % 7.4 3.5
Shrinkage Thickness % 6.1 2.5
MD 0.4 0.2
CMD 0.6 0.3
Oil Absorption % 12.5 10.01
AshContent % 0.5 0.9
Conductivity of
aqueous extract mS/m 10.5 6.5
Electric strength in oil kV/mm 14.0 13.5
