MRU3-1 – AC voltage relay

The voltage supervision relay MRU3-1 protects electrical power generators, consumers or operating components generally against over- or under-voltages. Among other applications the relay can be used for detection of over- or undervoltages in power genrating plants and energy supply systems  to protect generators against critical overvoltages in case of defective voltage regulators  as undervoltage protection for motors  as generator stator earth fault protection  as over- and undervoltage protection with evaluating the symmetrical components (MRU1-2, detailed information on this type can be found in the relevant technical description) There is also a similar protection relay IRU1 avail-able in a more simpler design, i.e. with less function, without display and without serial interface.

FEATURES & FUNCTIONALITY

The voltage supervision relay MRU3-1 protects electrical power generators, consumers or operating components generally against over- or under-voltages. Among other applications the relay can be used for detection of over- or undervoltages in power genrating plants and energy supply systems  to protect generators against critical overvoltages in case of defective voltage regulators  as undervoltage protection for motors  as generator stator earth fault protection  as over- and undervoltage protection with evaluating the symmetrical components (MRU1-2, detailed information on this type can be found in the relevant technical description) There is also a similar protection relay IRU1 avail-able in a more simpler design, i.e. with less function, without display and without serial interface.