The fault phase selectors, including the phase currentdifference suddenly-change and the sequence current, may misoperate in some cross country faults and conversion faults.
研究表明相电流差突变量、稳态电流序分量等选相元件在发生某些跨线及转换性故障时会误选相。
2
When no electricity is delivered, a voltage difference between the electrodes drives a current in the other direction.
当没有电流流通时，电极之间的电压差驱动电子反方向流动。
3
Purdue University researchers are working with General Motors to build thermoelectric generators, which produce an electric current when there is a temperature difference.