DEIF MDR-2 Multi-differential relay

The MDR-2 is a state-of-the-art combined differential protection and

short-circuit protection relay for generator protection against internal

short circuits (leaking currents).

Even in cases of fail tripping, the MDR-2 offers an adjustable tripping

characteristic function that compensates for unbalanced current

measurements, avoiding fail trippings altogether.

The MDR-2 gives you direct access to all settiangs and a chronological log

of up to 150 historical events/alarms. The unit’s integrated LCD screen displays

all measured and calculated values, eliminating the need for additional meters

or wiring, and facilitates fault-finding in connection with commissioning

identifying fault locations.

Available options include a block (generator + step-up transformer) protection

option and a short-circuit and over-current protection option.

Features

• Short response time (70 ms)

• 3-phase current detection on both generator sides

• Active adjustment of non-balanced current measurements

• Measuring accuracy 1 %

• Display indicator for all measurements

• DIN rail or base mounting with remote mountable display