详细分析了交流接触器在不同使用条件下的闭合与分断时触点两端电压与回路电流情况，并研究了AC1～AC4工作制下的控制时序。
The conditions of voltage between contactors and current in main circuit under different using types are analyzed in detail, then designed the control sequences with working mode AC1-AC4.
通过试验研究了弱电设备电气连线、制电路板及低压系统保险丝管等耐受雷电流的能力。
Lightning current withstand capacity test of electronic equipment wires and fuse links in low voltage power systems is conducted in laboratory.
另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.
应用推荐