IEC TS 62818-1-2024 PDF

Full title and description

IEC TS 62818-1:2024 — Conductors for overhead lines - Fiber reinforced composite core used as supporting member material - Part 1: Polymeric matrix composite cores. This Technical Specification establishes a system and gives guidance for polymeric-matrix fiber reinforced composite cores (PMC) used as the supporting member material in conductors for overhead lines, including terminology, recommended test methods, characterization procedures and indicative acceptance/failure criteria for use in specifications and procurement.

Abstract

IEC TS 62818-1:2024 provides common definitions, test methods and recommendations to characterise polymeric matrix composite (PMC) cores used as supporting members in overhead conductors. The document covers sampling, type/sample/routine tests, mechanical and thermal characterisation, traceability and packaging, and indicates acceptance or failure criteria where appropriate. It is intended to support consistent specification, testing and quality assurance under normal operating and environmental conditions; it does not itself mandate statutory compliance limits but may include indicative values in informative annexes.

General information

• Status: Published (Technical Specification).
• Publication date: 12 December 2024.
• Publisher: IEC — International Electrotechnical Commission (TC 7: Overhead electrical conductors).
• ICS / categories: 29.240.20 (Power transmission and distribution lines).
• Edition / version: Edition 1.0 (IEC TS 62818-1:2024).
• Number of pages: 35 pages.

Scope

This Technical Specification is applicable to fiber reinforced composite core with a polymeric matrix used as the supporting member material in conductors for overhead lines. It establishes common terminology and prescribes or recommends methods to characterise properties of PMC cores (single or multi-wire constructions), describes sampling and test regimes (type, sample and routine tests), and provides guidance on acceptance/failure criteria, traceability and packaging to ensure satisfactory use and quality under normal operating and environmental conditions. The document is intended to be used as the basis for specifications and does not by itself impose statutory performance requirements.

Key topics and requirements

• Definitions and common terminology for polymeric matrix composite (PMC) cores and related components.
• Recommended test programme: type tests, sample tests and routine tests for PMC core characterisation.
• Mechanical characterisation: tensile breaking load, elongation, flexural properties and related acceptance criteria.
• Dimensional and physical checks: wire appearance, diameter, mass per unit length and dimensional tolerances.
• Thermal performance: maximum continuous and peak-load temperature limits for the composite core and guidance for thermal testing.
• Creep, fatigue and environmental durability considerations relevant to long-term performance in service conditions.
• Coefficient of thermal expansion and other thermo-mechanical properties affecting conductor behaviour.
• Traceability, sampling, marking and packaging requirements to support quality assurance and supply-chain integrity.
• Guidance on acceptance/failure criteria and use of informative annexes for indicative values where appropriate.

Typical use and users

Primary users are overhead conductor manufacturers (composite-core producers and conductor assemblers), utility and transmission/distribution line engineers specifying and procuring conductors, independent test laboratories performing type and routine testing, standards developers and conformity assessment bodies. The TS is also used by procurement teams, research and development groups working on new conductor designs, and by consultants preparing technical specifications for new or refurbished overhead line projects.

Related standards

Relevant and commonly referenced documents include: IEC TS 62818-2 (Part 2: Metallic matrix composite cores), IEC 61089 (round wire concentric lay overhead stranded conductors), IEC 62219 (formed wire concentric lay stranded conductors), IEC TR 61597 (calculation methods for stranded bare conductors) and other TC 7 publications covering conductor materials, testing and performance. National adoptions or identical publications (PD/CLC variants) may also exist.

Keywords

fiber reinforced composite core, polymeric matrix composite (PMC), overhead conductors, conductor core, conductor testing, thermal performance, tensile strength, flexural properties, sampling, traceability, acceptance criteria, TC 7, power transmission lines.

FAQ

Q: What is this standard?

A: IEC TS 62818-1:2024 is a Technical Specification that provides guidance and recommended methods for characterising polymeric-matrix fiber reinforced composite cores used as the supporting member in overhead conductors.

Q: What does it cover?

A: It covers terminology, sampling, type/sample/routine test methods, mechanical and thermal property characterisation, traceability, packaging and indicative acceptance/failure criteria for PMC cores used in overhead line conductors.

Q: Who typically uses it?

A: Conductor and composite-core manufacturers, utilities and transmission/distribution engineers, test laboratories, procurement/specification teams, standards bodies and R&D groups working on overhead conductors.

Q: Is it current or superseded?

A: It is a current Technical Specification published on 12 December 2024 (Edition 1.0). As a TS it establishes recommended practice; users should check national adoption or subsequent amendments for the latest status in their country.

Q: Is it part of a series?

A: Yes — IEC TS 62818 is a multi-part series addressing fiber reinforced composite cores for overhead conductors; Part 1 covers polymeric matrix composite cores and Part 2 addresses metallic matrix composite cores. The series complements other TC 7 standards for conventional stranded conductors.

Q: What are the key keywords?

A: polymeric matrix composite, PMC core, fiber reinforced core, overhead conductors, conductor testing, tensile strength, thermal limits, traceability, TC 7.