Arcteq AQ-M257 - Motor Protection Relay

The AQ-M257 offers a modular motor protection and control solution for large and important asynchronous or synchronous motors requiring differential protection. 

Up to 9 optional I/O or communication cards are available for extensive monitoring and control applications. Up to 16 RTD signals can be connected for thermal alarming and tripping.

The AQ-M257 communicates using various protocols including IEC 61850 substation communication standard.

Highlights:

• Differential protection.
• A large I/O capacity
• 5 thermal models (time constant accurate)
• Soft-start protection beginning from 6 Hz.
• Wye-delta started motor supervision
• 2-speed motor protection.
• Optional power and energy measurement accuracy of up to 0.2 %.
• Asynchronous and synchronous motors.