AQ-G257 Generator Protection IED

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The AQ-G257 generator protection IED is well-suited for large machines that require complete generator protection and differential protection. You can add up to nine (9) I/O or communication cards into the device for extensive monitoring and control applications. You can also connect up to sixteen (16) RTD signals for thermal alarming and tripping. AQ-G257 communicates using various protocols, including the IEC 61850 substation communication standard.


  • Complete synchronous machine protection
  • Integrated differential protection
  • Power measurements up to Class 0.2S