Corrugated boards are commonly used as oil gap insulation for transformer. Its advantage lies in easy assembly.it improves the distribution of oil channels in solid insulation material, comparing with the strips radially arranged. In the oil channel of corrugated board, the solid insulation is very even. There is no surface which is perpendicular to electric field, therefore it can increase the strength of the oil channels by 15%, without losing reliability. The corrugated boards are produced by hot pressing. They have following advantages: Higher mechanical strength; Superior electric character; Stable shape and Accurate size.
|Conductivity of aqueous Extract||μs/cm||＜10.0||/|