The TERRA-C earth fault indicator is designed for use in radial networks and open ring networks with rigid or low-impedance resistive earthing. Earth faults are indicated by an LED and a bistable flip-flop display, which means that the fault condition remains clearly visible even without a power supply. Power is supplied by supercapacitors, which are charged via mains voltage and/or a power supply converter. Separable sensors enable easy retrofitting and flexible installation.
