AQ-F255D offers a modular protection and control solution for distance protection applications that require a large I/O capacity. Additionally, AQ-F255D integrates full feeder protection functionality.
Innovative line segment-based distance protection provides fast, selective and reliable protection by operating based on the principle of impedance measurement between the relay location and the fault point. The function allows protection schemes to be adjusted individually for each line segment using their real, independent impedance values instead of average values. This reduces the risk of unwanted operations through enhanced resistive reach and fault location accuracy, and improves selectivity and overall reliability. The segment-based distance protection can also distinguish between faults in underground cables and overhead line segments. Line segment-based distance protection also includes power swing block and out-of-step protection functions.
You can add up to eleven (11) I/O or communication modules into the device for extensive monitoring and control applications. AQ-F255D communicates using various communication protocols, including communication according to the IEC 61850 standard.
Highlights:
Innovative line segment-based distance protection function enhances resistive reach and fault location accuracy, particularly in mixed network, reducing the risk of unwanted operations.
