Prok dv's recommends and suggests to use Digital Microprocessor/ Microcontroller based
Earth Leakage Relay (ELR) with core Balance Current transformer (CBCT / ZCT) for typical
areas like UPS/ Inverter application, Mining, Cement, Petroleum & Oil Refineries, Steel, Paper
and Pulping industries for greater Sensitivity, Selectivity and Reliability. The measurement of
Leakage Current is TRUE RMS reading and the device has an external ADC having 24 bit for
greater degree of Accuracy. The Earth Leakage Relay (ELR) has Back-Lit LCD Display 2 Line 8
Character for displaying the nature and magnitude of Fault.