P0900EW-FOXBORO
当变电所内发生接地故障时,在变电站地网中和大地中流过接地故障电流,通过地网的接地电阻,使接地故障后的变电站地网电位高于大地电位,该电位的幅值决定于地网接地电阻及入地电流的大小,按我国有关规程规定其***大值可达每千安故障电10V。对于直流回路上发生故障或其它原因产生的短时电源中断接电源的干扰主要是直流与***,因为抗干扰电容与分布电容的影响,直流的***可能极短,也可能较长,在直流电压的***过程中。电子设备内部的逻辑回路会发生畸变,造成继电的暂态电位差,从而影响整个保护系统。
Sundstrand-Saue?r-Danfoss Hydraulic Series CPB Pump AI
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