The capacitor voltage transformer

operated in 35 kV system

often appears abnormal fuse of primary fuse during some system operating process.The test results show that in the process of the system operation

the voltage of the capacitor voltage transformer rapidly changes.During transient process

the LC circuit

consisted of linear capacitor

linear inductance and nonlinear inductance

produces the impulse current with higher amplitude and frequency

as well as the accumulation of the current thermal effect

leads primary fuse fusing.Through choosing higher rated current fuse

the abnormal fusing happening probability of the primary fuse can be reduced.According to the characteristic of the capacitor voltage transformer and the selecting principle of the capacitor voltage transformer fuse

cancel the primary fuse for 35 kV capacitor voltage transformer is reasonable.