Short-circuit indicator MD series

ground faultdigitalpanel-mount

The earth-fault and short-circuit indicators type MD can be used in radial networks with one input and open-ring networks. The connections between the short-circuit sensors and accordingly the earth-fault sensor to the display unit are done by cable. All sensors must be mounted on screened cables only. The sensors are divisible and can be retrofitted on the cable. For the operation of the display device an auxiliary power supply is recommended but not mandatory. An exchangeable lithium battery powers the display in case of missing or failing power supplies. The indicators of the MD-Series have a liquid crystal display (LCD) and an LED for the indication of faults and for the display of the present network current of each phase. The indicator's very flexible settings can be fully adjusted via the LCD display. The indicators type MD provide two relays for a separate remote indication of earth-faults and short-circuits. The remote contacts are change-over contacts (NO+NC) for highest flexibility. The indicators type MD also provide a serial interface. Via Modbus protocol the indicator's status can be read out and all settings of the indicator can be read out and changed. Additionally, the service current of the network can be read out remotely. The serial interface can be configured for low current consumption. Thus, the indicators type MD can be used without external power supply.