This edition supersedes the second edition of IEC 273 (1979).
Applies to post insulators and post insulator units of ceramic material or glass intended for indoor or outdoor service, and to post insulators of organic material intended for indoor service in electrical installations or equipment operating on alternating current systems with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. It may also be regarded as a provisional standard for insulators for use on direct current systems.
WITHDRAWN
IEC 60273:1968 ED1
99.60
Withdrawal effective
Nov 19, 2016
WITHDRAWN
IEC 60273:1968/AMD1:1972 ED1
WITHDRAWN
IEC 60273:1979 ED2