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IEC 60660

2nd Edition, October 1, 1999

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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

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Description / Abstract:

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.