Discussion on Analysis of Angular Ratio Difference of Current Transformers
During regular examination of a 500 kV substation#2 transformer and three-side circuit breaker,operators found that the winding to ground and the secondary insulation between the four C-phase windings of the 5032 switching current transformer were less than 1 MΩ.After opening the cover,it was found that the sealing ring was damaged and the inside was damp seriously.The operator contacted the technical personnel of the manufacturer to restore the insulation.After the treatment was qualified and the insulation was qualified by re-measurement,the transmission was recovered.
current transformeranglular differenceratio differenceinsulation