The utility initiative for interoperability between intelligent electronic devices in the substation-goals and status

In the new electric utility corporate culture, protection engineers must consider changing their traditional approach to relay and control engineering. Fundamental changes may be required to meet the competitive challenges of today. The development of microprocessor based intelligent electronic devices (IEDs) has provided the protection engineer the ability to meet these challenges in new ways not previously envisioned. The application of microprocessor relays provides significant cost savings over the previous generations of static and electromagnetic relays. The integration of digital based station IEDs on a common station LAN provides even more functionality and reduced costs