CLC/TC 7X - Overhead electrical conductors

2019-10-31:This prAA represents common mods. to prEN IEC 63248 (PR=70075)

2020-10-19: This prAA represents common mods to prEN IEC 62641 (PR=72849)

IEC 63248:2022 specifies the properties of wires in the diameter range of, but not limited to, 1,25 mm to 5,50 mm. This document is applicable to coated or cladded metallic wires before stranding used either as concentric lay overhead stranded conductors, or in the manufacture of cores for concentric lay overhead stranded conductors, for power transmission purposes. The various wire types and their designations are listed in Table A.1. For calculation purposes the values listed in Annex B are used. This first edition cancels and replaces the first edition of IEC 61232 published in 1993 and the first edition of IEC 60888 published in 1997. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous editions of IEC 61232 and IEC 60888: a) wire designations have been modified and grouped; b) wires with zinc coating class 2 were removed; c) new wire designations have been added; d) aluminium-clad FeNi36 wires have been added; e) advanced zinc-aluminium alloy coated steel wires have been added.

IEC 62641:2022 specifies the mechanical and electrical properties of round and formed wires for equivalent diameters up to the values according to Table 3 for aluminium and aluminium alloys and according to Table 4 for thermal resistant alloys. This document is applicable to aluminium and aluminium alloy wires for the manufacture of concentric lay overhead electrical stranded conductors with or without gap(s) for power transmission purposes. The various materials and their designations are listed in Table 1. For calculation purposes, the values listed in Table 1 are used. This first edition cancels and replaces the second edition of IEC 60104 published in 1987, the first edition of IEC 60121 published in 1960, the first edition of IEC 60889 published in 1987, and the first edition of IEC 62004 published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous editions of IEC 60104, IEC 60121, IEC 60889 and IEC 62004:
designations of aluminium alloys are modified;
aluminium alloys A4, AL4 and AL5 are added;
wire diameter ranges for indicating mechanical properties are modified and extended;
test methods are merged.

IEC 62567:2013 provides test procedures based on the documents mentioned in the introduction and devoted to minimize the causes of discrepancy between test results, taking into consideration the large experience accumulated in the last 30 years by numerous test engineers and available in literature, including a CIGRE Technical Brochure specifically referring to this standard (see Bibliography). This Standard describes the current methodologies, including apparatus, procedures and accuracies, for the measurement of conductor self-damping and for the data reduction formats. In addition, some basic guidance is also provided to inform the potential user of a given method's strengths and weaknesses. The methodologies and procedures incorporated in this Standard are applicable only to testing on indoor laboratory spans. Key words: Overhead lines, Self-damping, Conductors

Corrigendum to EN 50182:2001 Tabel F3 * Work transferred to the new CLC/TC 7X

This draft European Standard specifies the electrical and mechanical characteristics of ACSS conductors made of round or formed annealed aluminium wires and steel wires stranded in alternate directions, made of one or a combination of any of the following. 1.1 Outer/conductive layers Annealed Aluminium wire as per requirements of Clause 5. 1.2 Steel core a) Galvanized steel wire type ST6A according to EN 50189 and requirements of Clause 5; b) Zn95Al5 alloy coated steel wire with MM (mischmetal) as per EN 10244-2 and mechanical and mass of coating requirements as per Tables 2 and 3, in the following options: i Extra High Strength; ii Ultra High Strength. NOTE MM elements are mandatory. Coatings without MM can be used, if agreed between Supplier and Purchaser. Tests without MM must show the same behaviour than the MM coatings. c) Aluminium-clad steel wire 20,3 % conductivity in the following options: - as per EN 61232 with class designation 20 SA; - aluminium-clad steel wire Extra High Strength with designation 20 EHSA as per Table 4. d) Aluminium-clad steel wire 14 % conductivity, Extra High Strength with designation 14 EHSA as per Table 5.

IEC 62420:2008(E) specifies the electrical and mechanical characteristics of concentric lay stranded overhead electrical conductors, containing one or more self-supporting alumimium or aluminium alloy layer(s) made of combination of any of the following metal wires: - Hand drawn aluminium as per IEC 60889, designated A1; - aluminium alloy type A or B as per IEC 60104, designated A2 or A3; - thermal resistant aluminium alloy as per IEC 62004, designated AT1, AT2, AT3, or AT4; - regular strength steel as per IEC 60888, designated S1A or S1B; - high strength steel as per IEC 60888, designated S2A or S2B; - extra-high strength steel as per IEC 60888, designated S3A; - aluminium-clad steel as per IEC 61232, designated 20SA, 27SA, 30SA or 40SA.

Specifies the electrical and mechanical characteristics of concentric lay, overhead conductors of wires formed or shaped before, during or after stranding, made of combinations of any of the following metal wires: a) hard aluminium as per EN 60889 designated A1; b) hard aluminium as per EN 60889 designated A1F wire shaped before stranding; c) hard aluminium alloy as per EN 60104 designated A2 or A3; d) hard aluminium alloy as per EN 60104 designated A2F or A3F shaped before stranding; e) regular strength steel, designated S1A or S1B, where A and B are zinc coating classes, corresponding respectively to classes 1 and 2; f) high strength steel, designated S2A or S2B; g) extra high strength steel, designated S3A; h) aluminium clad steel, designated SA.

This standard specifies the characteristics of protective products, commonly known as greases, for corrosion protection of bare overhead line conductors made of aluminium, aluminium alloy, steel wires or a combination of these wires.

This European Standard specifies the electrical and mechanical characteristics of round wire concentric lay bare overhead electrical conductors stranded in alternate directions, with or without grease as per EN 50326, made of one or a combination of any of the following: a) Hard drawn Aluminium as per EN 60889 designated AL1 b) Aluminium alloy as per EN 50183 designated AL2 to AL7 c) Zinc coated steel wire as per EN 50189 with grade and class designated ST1A, ST2B, ST3D, ST4A, ST5E, and ST6C. d) Aluminium-clad steel wire as per EN 61232 with class designation 20SA (grades A and B), 27SA, 30SA and 40SA. Conductors made of zinc coated steel wires only are not included.

D113/067: TC 7 disbanded * Work transferred to the new CLC/TC 7X
2021: CLC legacy converted by DCLab NISOSTS

Is applicable to non-interrupted creep-testing of stranded conductors for overhead lines such as those specified by IEC 61089. Procedures for interpreting the results are also included. The object of the test is principally to calculate creep for any purpose and to compare creep of different conductors.

IEC 61394:2011 specifies the requirements and tests of greases designed for corrosion protection of bare overhead conductors.

Applicable to thermal-resistant aluminium alloy wires before stranding for manufacture of stranded conductors for overhead lines. It specifies the mechanical, electrical and thermal resistant properties of wires in the diameter range commercially available.

Is applicable to aluminium-magnesium-silicon alloy wires of two types having different mechanical and electrical properties for the manufacture of stranded conductors for overhead power transmission purposes. It specifies the mechanical and electrical properties of wires in the diameter range 1.50 mm to 4.50 mm.

This standard applies to round zinc-coated steel wires used in the construction and/or reinforcement of conductors for overhead power transmission purposes. It is intended to cover all wires used in constructions where the individual wire diameters, including coating, are in the range of 1,25 mm to 5,50 mm. Types of wire are designated STyz, where y represents the grade of steel and z represents the class of zinc coating. To reflect the needs of conductor users, the only combinations of steel grade and zinc coating covered by this standard are ST1A, ST2B, ST3D, ST4A, ST5E and ST6C. The properties specified are those before stranding.

Applies to hand-drawn aluminium wires for the manufacture of stranded conductors for overhead power transmission purposes. Specifies the mechanical and electrical properties of wires in the diameter rank 1.25 mm to 5.00 mm.

Applies to bare, hard-drawn, round, aluminium-clad steel wires of different electrical and mechanical properties.

Applies to hand-drawn aluminium wires for the manufacture of stranded conductors for overhead power transmission purposes. Specifies the mechanical and electrical properties of wires in the diameter rank 1.25 mm to 5.00 mm. This publication supersedes IEC 60111 (1983).