Three winding transformer differential protection


SIPROTEC 5 base module with large display

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    The transformer differential protection SIPROTEC 7UT86 is a universal protection, control and automation device on the basis of the SIPROTEC 5 system. It is especially designed for the protection of three winding transformers. It is the main protection for the transformers and contains many other protection and monitoring functions. The additional protection functions can also be used as backup protection for protected downstream objects (e.g. cables, line). At this it supports also modular availablility of the hardware.
    The device supports all SIPROTEC 5 system characteristics. It enables future-oriented system solutions with high investment security and low operating costs.

    Main function:

    1 Differential protection (standard) with add-on stabilizations;
    Up to 3 differential ground-fault protection
    For autotransformer applications 2 differential protection functions in a function group autotransformer can be used.

    Useable measuring point:

    6 three-pole current measuring Points,
    4 one-pole current measuring points,
    3 four-pole voltage measuring Points,
    3 one-pole voltage measuring points
    expandable to 4 sides

    Inputs and outputs:

    2 predefined standard variants with
    12 current transformers,
    4 voltage transformers
    11 to 23 binary inputs,
    18 to 34 binary outputs

    Hardware flexibility:

    Flexible adaptable and expandable I/O-quantity structure within the scope of the modular SIPROTEC 5-building blocksbuilding blocks

    Width of housing:

    1/3 x 19'' to 2/1 x 19''

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