This part of IEC 61850 applies to substation automation systems (SAS) . It defines communication between intelligent electronic devices (IEDs) in the substation and the related system requirements. The specifications of this part pertain to the general requirement of the communication network , with emphasis on the quality requirements . It also deals with guidelines for environmental conditions and uxiliary services, with recommendation on the relevance of specific requirements from other standards and specifications.

• Year of Declaration: 2003
• Reference: IEC 61850-3
• Number of Pages: 33
• Code: GYS IEC 61850-3
• Version: First edition 2002
• ICS Number: 33.180.20