Abstract: The one of most important outcome of the standardization process is the IEC61850 standard. IEC 61850 is an abstract application layer protocol aimed at providing interoperability between a variety of substation and feeder devices,by describing how devices to communicate in a substation as well as the related system requirements. This paper describes anyone interested in getting an overview of the IEC61850 international standard, and understanding how the objectoriented models proposed in the standard standardize the data found in IEDs and the communication of this date between substation devices.

Key words: IEC61850, IED, objectoriented, datasets, UML