Current sensor is an important element for on line PD monitor of electric power equipment and its transfer characteristic has a direct influence on PD measurement.
电流传感器是电力设备局部放电在线监测系统中的一个重要组成部分，其局部放电信号传输特性直接影响测量结果。
Using zero compensating line of two direct-current amplifiers as a reference line was suggested.
建议用两路直流放大器的零补偿线作为参考线。
Two Critical concepts involved in direct current ice-melting technique of high voltage over head line, the least ice-melting current and the Max allowed current was presented.
提出了架空输电线路直流融冰的两个重要参数：最小融冰电流和最大允许融冰电流的概念。
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