IEC 61089-1991 amd1-1997 PDF

Full title and description

IEC 61089:1991 with Amendment 1 (1997) — Round wire concentric lay overhead electrical stranded conductors. This designation (shown here as "St IEC 61089-1991 amd1-1997") refers to the IEC international standard IEC 61089, edition 1 (1991), together with Amendment 1 issued in 1997. The leading "St" in some catalogues is a catalog or national-prefix notation (not part of the IEC number itself) and is commonly used by distributors or national bodies to label a standard entry.

Abstract

IEC 61089:1991 specifies the electrical and mechanical characteristics, designation system and dimensional/tolerance requirements for round-wire concentric-lay stranded conductors used for overhead power transmission and distribution. Amendment 1 (1997) updates and expands technical tables, material designations and certain mechanical/electrical requirements to reflect developments in conductor materials and practice.

General information

• Status: Published (base standard published 20 June 1991; Amendment 1 published May 1997).
• Publication date: Base publication 1991-06-20; Amendment 1 published May 1997 (publication records list 22 May 1997).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 29.240.20 (Power transmission and distribution lines); 29.060.10 (Wires).
• Edition / version: Edition 1.0 (1991) with Amendment 1 (1997).
• Number of pages: Base document: 65 pages; Amendment 1: typically listed as 12–16 pages depending on distributor copy.

Scope

Specifies the electrical and mechanical properties and the designation system for round-wire concentric-lay overhead electrical stranded conductors used in overhead transmission and distribution lines. The standard consolidates and supersedes several earlier IEC documents covering wire/strand dimensions, materials and test requirements and provides normative tables for conductor sizes, materials (aluminium, aluminium alloys, zinc‑coated and aluminium‑clad steel) and performance parameters required for design and procurement. Amendment 1 revises and supplements these technical tables and requirements.

Key topics and requirements

• Definitions and designation system for concentric-lay stranded conductors (homogeneous and composite types).
• Materials covered: hard‑drawn aluminium, aluminium alloys, zinc‑coated steel wires, aluminium‑clad steel — material references to complementary IEC wire standards.
• Dimensional tolerances, strand lay ratios and stranding practices (concentric layers, reverse lay for adjacent layers, external layer lay direction).
• Electrical characteristics: DC resistance tables, conductivity conventions for composite conductors.
• Mechanical characteristics: rated tensile strength (RTS), steel ratio, linear mass and recommended selection of conductor sizes.
• Manufacturing and quality notes: surface condition, prohibition of certain joints in specific wire types, and test/sample requirements (with annex tables providing numeric data).

Typical use and users

Used by conductor manufacturers, utilities, transmission/distribution line designers, specification writers and procurement teams to specify and verify overhead bare conductors for power lines. Also referenced by testing laboratories and regulatory bodies when verifying compliance of stranded conductors with international practice and for selecting conductor types by mechanical strength and electrical resistance.

Related standards

Commonly referenced IEC documents and related standards include IEC 60889 (hard‑drawn aluminium wire), IEC 60888 (zinc‑coated steel wires), IEC 61232 (aluminium‑clad steel wires), and later/consolidating standards for overhead conductors such as IEC 62219 and test procedure standards like IEC 61395. These documents together form the normative framework for conductor materials, tests and classification.

Keywords

round wire; concentric lay; overhead conductors; stranded conductors; aluminium wire; zinc‑coated steel; aluminium‑clad steel; conductor designation; IEC 61089; amendment 1997.

FAQ

Q: What is this standard?

A: IEC 61089:1991 (with Amendment 1, 1997) is an international standard that defines requirements, designations and test data for round‑wire concentric‑lay overhead electrical stranded conductors used in power transmission and distribution systems.

Q: What does it cover?

A: It covers conductor types made from aluminium and aluminium alloys, steel and aluminium‑clad steel combinations, dimensional and tolerance requirements, lay ratios, electrical resistance data, tensile strength parameters and related manufacturing/testing recommendations. Amendment 1 updates specific tables and technical requirements.

Q: Who typically uses it?

A: Conductor manufacturers, utilities, transmission/distribution engineers, specifiers and testing bodies use the standard for design, procurement, compliance testing and quality control of overhead conductors.

Q: Is it current or superseded?

A: The base publication is IEC 61089:1991 with Amendment 1 issued in 1997; distribution records list the standard as published and the IEC entry shows the published edition details and a stability reference. Users should check national adoption status or the IEC Webstore for the latest lifecycle notes before relying on it for procurement or regulatory compliance.

Q: Is it part of a series?

A: Yes — IEC 61089 sits within a set of IEC publications maintained by TC 7 (Overhead electrical conductors) and is used alongside related material and test standards (for example IEC 60889, IEC 60888, IEC 61232, IEC 62219). Amendment documents (such as AMD1:1997) are part of the same base-numbered publication.

Q: What are the key keywords?

A: Round wire, concentric‑lay, stranded conductor, overhead line, aluminium conductor, steel core, conductor designation, IEC 61089, amendment 1997.