IEC 60273 is the traditional basic standard for station post insulators, “Distinguishing feature of indoor and outdoor post insulators for systems with nominal voltages greater than 1000V”. However, latest edition of 1990-02 only covers the designs of station post insulators made from ceramic material or glass for lightning impulse withstand voltage levels above 325 kV. Only for levels below equal 325 kV also designs made from organic material are described.
Hollow composite insulator,combination unit
Ceramic line post insulator polymer
Transmission line hardware
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