IEC 61854:2020 pdf free
IEC 61854:2020 pdf free.OVERHEAD LINES – REQUIREMENTS AND TESTS FOR SPACERS.
It does not apply to interphase spacers, hoop spacers and bonding spacers.
NOTE This document is written to cover the line design practices and spacers most commonly used at the time of writing. There may be other spacers available for which the specific tests reported in this document may not be applicable
In some cases, test procedures and test values are left to agreement between purchaser and supplier and are stated in the procurement contract. The purchaser is best able to evaluate the intended service conditions, which should be the basis for establishing the test severity.
In Annex A, the minimum technical details to be agreed between purchaser and supplier are listed.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies, For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050(466)1990, International Electrotechnical vocabulary (lEVi — Chapter 466:
Overhead lines
IEC 60888:1987. Zinc-coaled steel wires for stranded conductors
IEC 61284:1997, Overhead lines — Requirements and tests for fittings
ISO 34-1 :20 15, Rubber, vulcanized or thermoplastic — Determination of tear strength — Part 1:
Trouser, angle and crescent test pieces
ISO 34-2:20 15, Rubber, vulcanized or thermoplastic — Determination of tear strength — Part 2:
Small (Deift) test pieces
ISO 37:2017, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing or heat resistance tests
ISO 812:2017, Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness
ISO 815-1:2014, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or elevated temperatures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 80050-466 apply as well as the following.
ISO and IEC maintain terminological databases for use In standardization at the following addresses:
• IEC Electropedia: available at htlp:llwww.electropedia.orgl
• ISO Online browsing platform: available at httpJlwww.iso.orglobp
4 General requirements
4.1 Design
The spacer shall be designed as to:
— maintain subconductor spacing (at spacer locations), within any prescribed limits, under all conditions of service excluding short-circuit currents:
— prevent, in subspans between spacers, physical contact between subconductors, except during the passage of short circuit currents when the possibility of contact is accepted provided that the specified spacing is restored immediately following fault clearance;
— withstand mechanical loads imposed on the spacer during installation, maintenance and service (including short circuit conditions) without any component failure or unacceptable permanent deformation:
— avoid damage to the subconductor under specified service conditions:
— be free from unacceptable levels of corona and radio interference under specified service conditions:
— be suitable for safe and easy installation. For the bolted and latching clamp the design shall retain all parts when opened for attachment to the conductor:
— ensure that individual components will not become loose in service;
— be capable of being removed and re-installed on the subconductors without damage to the spacer or subconductors;
— maintain its function over the entire service temperature range:
— avoid audible noise.
Other desirable characteristics, which are not essential to the basic functions of the spacer but which may be advantageous to the purchaser, include:
• verification of proper installation from the ground,
• ease of installation and removal from energized lines.IEC 61854 pdf free download.
