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
绝缘子.标称电压大于1000V至但不包括300kV的系统用有机材料室内支柱绝缘子的试验
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, 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.