Motor Protection 


    Device MRM4
    Line HighPROTEC
    Binary inputs 8
    Analog Outputs Optional
    Control and detection of switchgears Yes
    Control and supervision of a circuit breaker (remote or local) 1
    Output relays 5
    Voltage transformer inputs 4
    Watchdog relay 1
    Earth fault protection [50N/51N] Yes
    Frequency gradient [81] Yes
    Frequency protection [81O/U] Yes
    IEC 60870-5-103 Optional
    Inrush stabilisation (2nd harmonic) Yes
    IRIG-B00X Yes
    Modbus (TCP) Optional
    Modbus RTU Protocol Optional
    Motor protection: incomplete start [48] Yes
    Motor protection: locked rotor [51] Yes
    Motor protection: max. number of starts [66] Yes
    Motor protection: thermal protection [49] Yes
    Motor protection: undercurrent [37] Yes
    Negative sequence protection [46] Yes
    Output relay matrix Yes
    Parameter sets 4
    Profibus DP Optional
    Programmable Logic Yes
    Reset / Blocking Yes
    Residual voltage [59N] Yes
    Resistance earthed / solidly earthed [50N/51N] Yes
    Time Synchronization via SNTP Yes
    Sensitive EF isolated/compensated [50SN/51SN] Yes
    Thermal replica [49] Yes
    Time Date Yes
    Time overcurrent protection [50/51] Yes
    Trip- and auxiliary relays [86] Yes
    Trip circuit resp. control circuit supervision [74TC] Yes
    Voltage transformer supervision [60FL] Yes
    IEC 61850 Optional
    Time Synchronization via Modbus Yes
    Time Synchronization via IEC 60870-5-103 Yes
    Demand Management Yes
    THD (Todal Harmonic Distortion) Protection Yes
    RTD Temperature Protection [23] Optional
    Disturbance recorder Yes
    Event recorder Yes
    Fault recorder (none volatile) Yes
    Motor Start Recorder Yes
    Trend recorder Yes
    ANSI: IEC:
    37; I<t
    46; I2>
    48; IANL
    49; J>,t
    50; I>,I>>
    50BF; CBF
    50N; IE>,IE>>
    51; I>t>, I>>t
    51LR; -
    51LRS; -
    51N; -
    66; -
    74TC; -


    All shown details without any guarantees!  We reserve the right of changes without prior notice.
    *Only the basic device structure is shown.  Differences in detail are possible.

    Connection Diagram
    Product Specification