differential protection relay / digital / configurable / modular
7UT82/85/86/87 series

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differential protection relay differential protection relay - 7UT82/85/86/87 series


  • Other characteristics:

    digital, differential, configurable, modular, high-voltage, with integrated transformer, panel-mount, three-phase


The SIPROTEC 7UT82/85/86/87 transformer differential protection have been designed specifically for the protection of two and multi-winding (up to 5 sides). transformers. They are the main protection for the transformer and contain many other protection and monitoring functions. The additional protection functions can also be used as backup protection for subsequent protected objects (such as cables or lines). The modular expandability of the hardware supports you in this process. With their modular structure, flexibility, and the high-performance DIGSI 5 engineering tool, SIPROTEC 5 devices offer future-oriented system solutions with high investment security and low operating costs.

Main function:
•1 differential protection function (standard or auto transformer) with additional stabilization; up to 2 restricted ground-fault protection functions
Usable measuring Points:
•2 x 3-phase current measuring points,
•2 x 1- phase current measuring points
Inputs and outputs:
1 predefined standard variant with
•8 current transformers,
•7 binary inputs,
•7 binary outputs
Hardware flexibility:
•The 1/3 base module is available with the IO103 module; it is not possible to add 1/6 expansion modules, available with large and small display

DIGSI 5 permits all functions to be configured and combined as required.
•Transformer differential protection for two-winding transformers with versatile, additional protection functions
•Transformer differential protection for phase-angle regulating transformers of the single core type
•Universal usability of the permissible measuring points
•Applicable from average up to extra-high voltage