EN 60870-5-103:1998/prA1:2026

• Status: Not Published
• Publication Date: 15-Nov-2027
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: CLC/TC 57 - Power systems management and associated information exchange
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 17-Jul-2026
• Completion Date: 17-Jul-2026
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 60870-5-103:2000/oprA1:2026 - Amendment 1 - Telecontrol equipment and systems - Part 5-103: Transmission protocols - Companion standard for the informative interface of protection equipment

• Amends: EN 60870-5-103:1998 - Telecontrol equipment and systems - Part 5-103: Transmission protocols - Companion standard for the informative interface of protection equipment
• Effective Date: 13-May-2025

Overview

EN 60870-5-103:1998/prA1:2026 is an amendment to the European standard focusing on telecontrol equipment and systems, specifically part 5-103, which details transmission protocols. This amendment, known as Amendment 1, serves as a companion standard for the informative interface of protection equipment. Developed by the European Committee for Electrotechnical Standardization (CLC) and closely aligned with the International Electrotechnical Commission (IEC TC 57), this update primarily revises terminology to enhance clarity and align with updates in the IEC 60870 series.

This standard is essential for organizations involved in the management, monitoring, and protection of power systems-especially where reliable telecontrol and data exchange between control systems and protection equipment are critical.

Key Topics

Amendment 1 to EN 60870-5-103 addresses several important aspects:

• Terminology Updates: Revises key definitions within the standard to synchronize with the latest edition of the IEC 60870 series, promoting consistent language across international documentation.
• Unbalanced Transmission: Clarifies that under this protocol, the "control system" refers to the controlling station (primary station), and the "protection equipment" operates as the controlled (secondary) station. Unbalanced transmission ensures a clear hierarchy in communications.
• Compatibility: Tailors the informative interface to ensure seamless interaction between telecontrol systems and protection relays or devices, supporting interoperability across different equipment vendors.
• Alignment with IEC: Maintains harmonization with parallel IEC and CENELEC standards, ensuring broad applicability and international recognition.

These updates improve the document’s utility for equipment manufacturers, system integrators, SCADA engineers, and utilities operating within the energy sector.

Applications

EN 60870-5-103:1998/prA1:2026 underpins critical applications in the field of telecontrol and protection in power systems:

• Substation Automation: Facilitates reliable data exchange between substation control systems and protection equipment, enabling real-time monitoring and control.
• Protection Equipment Integration: Ensures compatibility when integrating digital protection relays and intelligent electronic devices (IEDs) from different manufacturers.
• SCADA and Telecontrol Systems: Provides a standardized communication protocol for integrating protection data into supervisory control and data acquisition (SCADA) systems.
• Grid Modernization Projects: Supports upgrades and new deployments of smart grids by defining interoperable, robust transmission protocols for protection signaling.
• Utility Operations: Essential for utility companies to achieve reliable monitoring, fault diagnostics, and remote control of power transmission and distribution assets.

By implementing this standard, organizations can expect improved interoperability, reduced integration effort, and enhanced reliability in their telecontrol and protection interfaces.

Related Standards

To fully leverage the benefits of EN 60870-5-103:1998/prA1:2026, consider the following related standards:

• EN 60870-5-2: Defines the basic transmission frame formats and procedures for telecontrol systems on which part 5-103 is based.
• IEC/EN 60870-5-101: Specifies basic telecontrol protocols for general remote control use.
• IEC/EN 61850: Focuses on communication networks and systems for substations, offering modern approaches for protection and control.
• EN 61850-7-4: Details compatible logical node classes and data classifications within substation automation.
• IEC TC 57 Standards: Comprehensive suite covering power systems management and associated information exchange.
• ISO/IEC Directives Part 1 & 2: Reference for procedural and drafting rules used in the development of IEC and EN standards.

Staying aligned with these standards ensures that power utility systems remain interoperable, secure, and future-proof in evolving digital environments.

Keywords: EN 60870-5-103, telecontrol equipment, transmission protocols, protection equipment, substation automation, SCADA, IEC 60870 series, unbalanced transmission, CLC, companion standard.

SLOVENSKI STANDARD
01-junij-2026
Oprema in sistemi za daljinsko vodenje - 5-103. del: Protokoli prenosa -
Spremljevalni standardi za informativni vmesnik zaščitne opreme - Dopolnilo A1
Amendment 1 - Telecontrol equipment and systems - Part 5-103: Transmission protocols
- Companion standard for the informative interface of protection equipment
Fernwirkeinrichtungen und -systeme - Teil 5-103: Übertragungsprotokolle -
Anwendungsbezogene Norm für die Informationsschnittstelle von Schutzeinrichtungen
Matériels et systèmes de téléconduite - Partie 5-103: Protocoles de transmission -
Norme d'accompagnement pour l'interface de communication d'information des
équipements de protection
Ta slovenski standard je istoveten z: EN 60870-5-103:1998/prA1:2026
ICS:
33.200 Daljinsko krmiljenje, daljinske Telecontrol. Telemetering
meritve (telemetrija)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

57/2907/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60870-5-103/AMD1 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-04-24 2026-07-17
SUPERSEDES DOCUMENTS:
57/2778/RR
IEC TC 57 : POWER SYSTEMS MANAGEMENT AND ASSOCIATED INFORMATION EXCHANGE
SECRETARIAT: SECRETARY:
Germany Mr Heiko Englert
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for Vote
(CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which t hey are
aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to
be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses.
(See AC/22/2007 or NEW GUIDANCE DOC).

TITLE:
Amendment 1 – Telecontrol equipment and systems – Part 5-103: Transmission protocols – Companion
standard for the informative interface of protection equipment

PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
The present CDV of Amendment 1 to IEC 60870-5-103 ED1 contains an update of the terminology used in the IEC
60870 series
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 60870-5-103:1997/AMD1 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
TELECONTROL EQUIPMENT AND SYSTEMS –

Part 5-103: Transmission protocols –
Companion standard for the informative interface of protection equipment

FOREWORD
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