Description
Product Introduction
ABB REF541DM115AAAA is a feeder protection terminal from the REF 540 series. This IED combines protection, control, measurement, and supervision functions for medium voltage distribution networks in substations and industrial facilities. It excels in feeder applications with overcurrent and earth-fault detection.
The terminal offers programmable logic compliant with IEC 61131 standards. It integrates with legacy SCADA systems and supports cost-effective upgrades through its modular design and communication options.
Frequently Asked Questions
Q: Does this unit support hot-swapping? A: No. These feeder terminals must have power removed before replacement. The shared bus and power design does not allow safe live module exchange.
Q: Is the REF541 series obsolete and what replacements exist? A: Yes, the entire 540 series reached end-of-life. Typical upgrades move to Relion series such as REF615. Match all protection functions and re-test settings after the change.
Q: Will I lose my program during replacement? A: Not if you export the full configuration first. Use the appropriate setting tool to back up logic and parameters. Reload everything on the new unit and verify operation point by point.
