IEC published the Committee Draft (57/2980/CD) on IEC 61850-8-3

The next step of the publication of IEC 61850-8-3 has been reached

Yesterday (2026-09-04) IEC published the Committee Draft (57/2980/CD) on

"Communication networks and systems for power utility automation –
Part 8-3: Specific Communication Service Mapping (SCSM) –
Mapping to Direct Message Specification (DMS), JSON Encoding Rules, and WebSockets"

The commenting period closes on 2026-10-30 ... very soon.

All experts that are members of the IEC TC 57 National Committees can access the document and provide comments online.

My experience with the editing processing tool (OSD - Online Standards Development) is very positive: After I finished the editing on Monday (2026-08-31) IEC could easily publish the CD ... the document follows automatically the format of IEC ... because it is an IEC (ISO) tool ... perfect.

The crucial definition is the ASN.1 message schema that is used to code and decode messages (see see below for a link to the ASN.1 schema used in the RTI2 open-source software):

The committee draft (57/2980/CD) is based on the Netherlands Netbeheers Proof of Concept for RTI2 (real-time interface). Netbeheer is supporting the implementation as open-source software under GitHub. The message syntax of the committee draft is the latest ASN.1 module. The ASN.1 version at GitHub is a pre-version of the official version:
General: https://github.com/Netbeheer-Nederland/iec61850-websocket

Direct Access to the ASN.1 Schema: https://github.com/Netbeheer-Nederland/iec61850-websocket/blob/main/src/ws61850/asn1/schema/ws_iec61850_tpaa_full.asn

Please check my blog for additional information on IEC 61850-8-3.
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