IEC 60660 2nd Edition, October 1, 1999
Insulators - Tests on Indoor Post Insulators of Organic Material for Systems with Nominal Voltages Greater Than 1 000 V up to but Not Including 300 kV
Additional Comments: BILINGUAL
Published By:International Electrotechnical Commission (IEC)
This International Standard is applicable to post insulators of organic material for indoor service in electrical installations or equipment operating in air at atmospheric pressure on alternating current with a nominal voltage greater than 1 000 V up to, but not including, 300 kV, as defined by range I of IEC 60071-1, and a frequency not greater than 100 Hz. Composite insulators are not covered by this standard.
The object of this standard is
- to define the terms used;
- to define electrical and mechanical characteristics of post insulators of organic material and to prescribe the conditions under which the specified values of these characteristics are verified;
- to prescribe methods of testing;
- to prescribe acceptance criteria.
This standard does not give numerical values for insulator characteristics; nor does it deal with a choice of insulators for specific operating conditions. IEC 60273 specifies numerical values for electrical and mechanical characteristics and gives the dimensions necessary for interchangeability of post insulators.