EarthLeakageResistance indicator unit is used to measure the leakage Resistance directly in k ohms of both Positive and negative poles directly, It also measure system Voltage. If the measure leakage resistance falls below the selected alarm limit Setting , Fault condition is indicated by Fault and Alarm indication, Also alarm relay get activated with buzzer sound. User can acknowledge The alarm condition by pressing Alarm acknowledge switch. Then alarm Relay get deactivated with alarm indication switch off. Fault indication remain On till it is present.