AQ-T215 Voltage Regulating IED

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AQ-T215 is a voltage regulating IED. It comes with current-based and voltage-based protection functions, which makes the relay suitable for combined transformer voltage regulation and back-up protection. The transformer monitoring module is included as a standard feature, and it provides statistical information for preventive maintenance purposes. AQ-T215 communicates using various protocols, including the IEC 61850 substation communication standard.


  • Automatic/manual voltage regulating (AVR)
  • Transformer back-up protection
  • Overloading and through fault statistics for preventive maintenance