A kind of dry type high voltage current transformer with such composite materials as PTFE film coated with silicone oil as main insulation

which was developed by the authors

had independent intellectual property right and operated for more than 20 years both at home and abroad

is introduced in this paper. Compared to SF

6

gas insulated high voltage current transformer

the product has significant advantage in such aspects as safety

reliability

weight

manufacture cost

productivity as well as technical parameters such as extremely low partial discharge and dielectric loss factor etc. Moreover

the development of this kind of current transformer from low to high rated voltage

single to series and home to abroad is also introduced.

At present

the technology has reached maturity

has been operated at home and more than 30 countries in the world with reliable operation and is unique in high voltage apparatus industry.