AQ-T257 Transformer Protection IED

AQ-T257 transformer protection IED with differential protection function and an integrated automatic voltage regulator function.

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    The relay provides complete current-based and voltage-based protection functions as well as full measurements. You can add up to nine (9) I/O or communication cards into the device for extensive monitoring and control applications. AQ-T257 communicates using various protocols, including the IEC 61850 substation communication standard.

    Highlight

    • A large I/O capacity
    • Automatic/manual voltage regulating (AVR)
    • Complete transformer protection
    • 2nd and 5th harmonic blocking
    • Automatic verification of a connection group and nominal value settings
    • Overloading and through fault statistics for preventive maintenance
    • Power and energy measurement class of 0.2S