Earth-leakage protection relay AQ-T256

over-currentthree-phaseIEC

AQ-T256 is a transformer protection IED with sophisticated and easy to use differential protection function. The AQ-T256 transformer protection IED provides for both low and high side overcurrent, earth-fault, negative sequence and two independent restricted earth-fault instances. Up to 10 optional I/O or communication cards are available for extensive monitoring and control applications. The AQ-T256 communicates using various protocols including IEC 61850 substation communication standard. Highlights Large I/O capability Predefined or custom connection group selection 2nd and 5th harmonic blocking Automatic verification of connection group and nominal value settings Through fault and overloading statistics for preventive maintenance