The AQ-M257x motor protection device offers a modular protection and control solution for larger and more important motors that require 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-M257x communicates using various protocols, including the IEC 61850 substation communication standard.
The AQ-M257x motor protection device has two (2) software options: AQ-M257A (the “A” variant) is designed for asynchronous machines, and AQ-M257B (the “B” variant) is designed for synchronous machines. For more details on the software options, please see the order code below.
A large I/O capacity.
Five (5) thermal models (time constant accurate).
Soft start protection beginning from 6 Hz.
Wye-delta started motor supervision.
Two-speed motor protection.
Optional power and energy measurement accuracy of up to 0.2 %.
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