Historical
IEC 61109 Ed. 1.0 b:1992
Composite insulators for a.c. overhead lines with a nominal voltage greater than 1000 V - Definitions, test methods and acceptance criteria
Applies to composite insulators for use as suspension/tension line insulators. Deals with those composite insulators which include a 'core' and a 'housing'. Defines the terms used, prescribes test methods, prescribes acceptance criteria.
International Electrotechnical Commission [iec]