Transformer Differential Protection – 2 Windings

    Transformer Differential Protection – 2 Windings

    The various protective functions of the MRDT4 are specifically tailored to the protection of two winding transformers. The device offers in addition to the differential protection various communication and backup protection functions.

    Furthermore the MRDT4 can be used for generator differential protection.

    The intuitive operating concept with plausibility checks and extensive commissioning functions such as the built-in fault simulator allows a safe and time-optimized maintenance and commissioning. The parameter setting and evaluation software Smart view can be used consistently across the entire family of devices.

    ANSI : 50, 51, 50N, 51N, 46, 49T, 60FL, 86, 50BF, 74TC , 60L, 64RE F, 87G, 87T

    Device MRDT4
    Line HighPROTEC
    Binary inputs 10(+8)
    Control and detection of switchgears Yes
    Control and supervision of a circuit breaker (remote or local) 2
    Current transformer inputs 8
    Output relays 6(+6)
    Watchdog relay 1
    Auto reclosing AR [79] Yes
    Circuit breaker failure protection [50BF] Yes
    Current transformer supervision [60FL] Yes
    Differential protection: Generator [87G] Yes
    Differential protection: Transformer [87T] Yes
    Earth fault protection [50N/51N] Yes
    IEC 60870-5-103 Optional
    Inrush stabilisation (2nd harmonic) Yes
    IRIG-B00X Yes
    Modbus (TCP) Optional
    Modbus RTU Protocol Optional
    Negative sequence protection [46] Yes
    Output relay matrix Yes
    Parameter sets 4
    Profibus DP Optional
    Programmable Logic Yes
    Reset / Blocking 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
    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
    Trend recorder Yes
    ANSI: IEC:
    46; I2>
    49; J>,t
    50; I>,I>>
    50BF; CBF
    50N; IE>,IE>>
    51; I>t>, I>>t
    51N; IE>t,IE>>t
    60FL; Yes
    74TC; Yes
    86; Yes
    87T; ID>


    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.