Three winding transformer differential protection


SIPROTEC 5 base module with large display

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    The SIPROTEC 7UT86 transformer differential protection has been designed specifically for the protection of three-winding transformers (3 sides). It is the main protection for the transformer and contains many other protection and monitoring functions. The additional protection functions can also be used as backup protection for protected downstream objects (such as cables or lines). In this regard you are also supported by the modular expandability of the hardware. The device supports all SIPROTEC 5 system characteristics. It enables upgradeable system solutions with high investment security and low operating costs.
    With its modular structure, flexibility and the powerful DIGSI 5 engineering tool, SIPROTEC 7UT86 offers futureoriented system solutions with high investment security and low operating costs.

    Main function:

    1 differential protection function (standard) with additional stabilization; up to 3 ground fault differential protection functions

    For auto transformer applications, two dif-ferential protection functions can be pro-cessed in an auto transformer function group

    Useable measuring point:

    6 x 3-phase current measuring points, 4 x 1-phase current measuring points, 4 x 3-phase 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:

    Flexibly adjustable and expandable I/O quan-tity structure within the scope of the SIPROTEC 5 modular System

    Housing width:

    1/2 × 19" - 2/1 × 19"

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