The AQ-F255B line differential protection device offers a modular protection and control solution for line differential protection applications that require a large I/O capacity. Additionally, AQ-F255B integrates various current protection functions. However, if your application requires voltage protection and measurements, you can easily upgrade the B variant at any time to the AQ-F255C variant by updating the firmware.
Communication between the master node and the sub-node devices is performed over a smart process bus and it is easy to set. The process bus transfers both standard and user-defined data, and it automatically synchronizes the line differential protection settings from the master node device to the sub-node device. The process bus handles the compensation for delays in communication, which means that no external time synchronization is needed.
You can add up to eleven (11) I/O or communication modules into the device for extensive monitoring and control applications. The AQ-F255B line differential protection device communicates using various communication protocols, including communication according to the IEC 61850 standard.
Line differential protection with a smart dedicated process bus.
Highlights:
A large I/O capacity.
Line differential protection for two line terminal ends.
Especially suitable for e.g. substations connecting wind and solar power facilities to the power grid.
Standard settings for communication – only the master node device needs to be selected.
Master node device synchronizes transfers, configurations, and settings to the sub-node device.
