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Application & OT Security · Advanced

IEC 61850

An international standard for communication in electrical substation automation, defining data models and protocols such as GOOSE, Sampled Values and MMS.

Definition

GOOSE and Sampled Values are fast Layer 2 multicast messages used for protection, and MMS is used for client/server communication. IEC 62351 defines security extensions for these protocols, including authentication of GOOSE messages.

Example

Protection relays exchange GOOSE messages to trip breakers within milliseconds.

Exam tip

Pair IEC 61850 with IEC 62351 for security.

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