IEC 60909-3:2009 specifies procedures for calculation of the prospective short-circuit currents with an unbalanced short circuit in high-voltage three-phase a.c. systems operating at nominal frequency 50 Hz or 60 Hz, i. e.: - currents during two separate simultaneous line-to-earth short circuits in isolated neutral or resonant earthed neutral systems; - partial short-circuit currents flowing through earth in case of single line-to-earth short circuit in solidly earthed or low-impedance earthed neutral systems. The currents calculated by these procedures are used when determining induced voltages or touch or step voltages and rise of earth potential at a sta
DS/EN 60909-3-2010由丹麦标准化协会 DK-DS 发布于 2010-11-28,并于 2010-11-28 实施。
DS/EN 60909-3-2010在国际标准分类中归属于: 17.220.01 电学、磁学综合。
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