Power transformers are key elements in power systems. A power transformer lifetime is typically defined by the lifetime of the insulating pressboard in the transformer. To explore the effect of different Kraft pulp on the performance of insulating perssboard, three imported kinds of kraft pulp, namely, Canadian pulp HY, Russian pulp EKB, Chile Pulp JX, were used to prepare pressboard samples. The results show that there are some differences on fiber morphology, fiber length and width between them. The tensile strength and breakdown voltage of t...
