... high resistance and high capacitance,Directly powered by DC system,Shown current direction, can detect loop fault DC earth fault ... positive and negative bus to ground voltage, earth resistance, distributed capacitance and balance resistance, etc. Automatically match the best frequency. ... capacitance value to ground: branch ≤22uF, total ≤150uFEarth resistance range:0-200KΩ@ system level is 220V; 0-100KΩ@ ...