ISO TS 81346-101-2025 PDF

Full title and description

Industrial systems, installations and equipment and industrial products — Structuring principles and reference designations — Part 101: Modelling concepts, guidelines and requirements for power supply systems (ISO/TS 81346-101:2025). This Technical Specification provides modelling concepts and practical guidance for applying the ISO/IEC 81346 reference designation system (RDS) specifically to power supply systems, with examples and conversion guidance for harmonized use across power domains.

Abstract

This Technical Specification gives guidelines to support the application of the ISO 81346 and IEC 81346 series to power supply systems, and specifies best practice for use and implementation depending on user type and situation. It aims to harmonize reference designation use across power-generation and power-distribution domains; introductory RDS examples are provided in annexes and a conversion table example is included to relate this part to other 81346 classes.

General information

• Status: Published.
• Publication date: 27 January 2025.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 01.110 (Technical product documentation).
• Edition / version: Edition 1 (2025).
• Number of pages: 137 pages.

(Publication and bibliographic details as recorded by ISO and national distributors.)

Scope

The document provides rules, modelling concepts and recommendations to apply the ISO/IEC 81346 reference designation system in the domain of power supply systems (including generation, transmission, distribution and related installations). It clarifies how to formulate unambiguous reference designations, offers best-practice guidance depending on user needs, and includes annex examples and a conversion table to link domain-specific structuring systems with the classes used across the 81346 series. Target industries cited include wind, photovoltaic, thermal, nuclear and hydropower.

Key topics and requirements

• Application of RDS semantics and classification rules to power-supply systems (modelling concepts for identification and information retrieval).
• Guidelines for forming unambiguous reference designations for system elements and components in power domains.
• Best-practice implementation recommendations for different user roles and situations (design, documentation, asset management).
• Examples and worked annexes illustrating RDS use (introductory examples in Annex A and B; conversion table example in Annex C).
• Assumption that users are familiar with core 81346 basics (IEC/ISO 81346-1 and -2) and how to map those to power-specific classes.
• Support for harmonization between technical domains and industries to improve interoperability of documentation and digital models.

Typical use and users

Typical users include power-system engineers, plant designers, technical authors and documentation specialists, asset managers, utilities, equipment manufacturers, system integrators, and organizations implementing digital engineering or BIM workflows for power infrastructure. The TS is used when establishing or aligning reference designation schemes for new or existing power installations, preparing documentation that must interoperate across disciplines, or mapping legacy structuring systems to an RDS-based scheme.

Related standards

Part of the ISO/IEC 81346 family and intended to be used in conjunction with the core parts: IEC/ISO 81346-1 (basic rules) and IEC/ISO 81346-2 (classification and codes for classes). It complements earlier and parallel 81346 parts (for example 81346-10 RDS for power systems, other domain parts such as -12, -14 and model-related parts like -8 and -50). Users should consult IEC/ISO 81346-1 and -2 for core RDS principles and 81346-10 for the broader power-systems structuring rules.

Keywords

reference designation system; RDS; structuring principles; power supply systems; modelling concepts; technical product documentation; ISO 81346; IEC 81346; harmonization; reference designations.

FAQ

Q: What is this standard?

A: ISO/TS 81346-101:2025 is a Technical Specification that gives modelling concepts, guidelines and requirements for applying the ISO/IEC 81346 reference designation system specifically to power supply systems (generation, transmission, distribution and related installations).

Q: What does it cover?

A: It covers how to structure information and create unambiguous reference designations for objects in power supply systems, offers best-practice implementation guidance for different users, and provides annex examples and a conversion table to relate domain-specific structuring systems to the 81346 class scheme.

Q: Who typically uses it?

A: Power-system designers and engineers, documentation specialists, asset managers, utilities, manufacturers and system integrators—anyone responsible for naming, structuring or exchanging technical information about power systems. It is also useful where multiple disciplines must harmonize documentation or link legacy structuring schemes to an RDS.

Q: Is it current or superseded?

A: ISO/TS 81346-101:2025 was published on 27 January 2025 and is the current Technical Specification edition; as with ISO publications it will be subject to periodic review. Users should monitor the 81346 series for any later revisions or related committee drafts.

Q: Is it part of a series?

A: Yes — it is part of the ISO/IEC 81346 family (structuring principles and reference designations). It is intended to be used alongside the foundational parts (81346-1 and 81346-2) and other domain-specific parts (for example 81346-10 and other numbered parts covering construction, manufacturing, vehicles and processes).

Q: What are the key keywords?

A: Reference designation system (RDS), power supply systems, structuring principles, modelling concepts, ISO 81346, IEC 81346, documentation harmonization, reference designations.