Effects of passivator on lifetime and electrical properties of insulating paper

This paper conducted thermal aging experiments under 120°C to study the effects of passivator on insulating paper (board). Experiment group (oil containing passivator and typical materials inside transformer) and control group (oil containing typical materials inside transformer but no passivator) were prepared for thermal aging experiments, and the degree of polymerization of insulating paper, furfural products in oil and the breakdown voltage, insulation resistance and dielectric dissipation factor of insulating board were tested, respectively. The results show that the furfural content in oil, the degree of polymerization of insulating paper and the breakdown voltage, insulation resistance and dielectric dissipation factor of insulating board of the experiment group were very similar to that of the control group under the same aging conditions, and passivator did not bring damage to the insulating paper (board).