New dry-type HV power apparatus with insulate materials of PTFE film and others

such as current transformer

wall bushing

cable terminal

used for more than 20 years. For its outstanding characteristics of no oil-filling

no gas-filling

no porcelain

easy to maintain

strong anti-pollution

those products have been accepted generally. But too little research was done about its insulating materials made up of PTFE film and others. The result show the electric life of this material of PTFE and others could be more than 45 years even in 3 kV/mm and 100% safety margin.