By analysis and calculation for short circuit current of low voltage motor, kinds and protection methods of short circuit of the low voltage are explained.
通过对低压电动机短路电流分析和计算，说明低压电动机短路的种类和保护方法。
Based on the analysis of main fault types of LV (Low Voltage) flameproof motor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.
通过分析低压隔爆电动机的主要故障类型，针对不对称性短路故障和断相故障提出了采用负序保护原理进行保护的方案。
It is the only way to solve above problems that the earth leakage circuit breaker of time lag action and the distribution protection are adopted in low voltage supply system.
在低压供电系统内采用延时动作的漏电保护开关和分级保护技术，是解决上述问题的唯一途径。
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