...三相短路电流；弹簧操作机构 [gap=764]Key words: vacuum circuit breaker; electrodynamics force; three-phase short-circuit current; spring operating organization ..
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Therefore, it is advisable to take the following method for grid three-phase short-circuit current calculation.
为此，建议采取以下的方法进行电网三相短路电流计算。
The expression for short-circuit electrodynamic force of rectangular bus bars on the basis of the calculation of three-phase symmetry short-circuit current was fi.
本文首先根据系统发生三相对称短路时的短路电流，给出了三相矩形母线短路电动力的解析表达式。
Based on the detailed analysis of basic principle, the traditional three-phase short-circuit criterion of phase selection element based on sudden-change of phase current differential is improved.
在详细分析相电流差突变量选相基本原理的基础上，对传统相电流差突变量选相元件三相短路故障判据进行了改进。
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