Staðlaráð Íslands - Íslenskir staðlar

Staða:

Gildistaka - 20.4.2022

Enskt heiti:

Earthing of power installations exceeding 1 kV a.c.

Tækninefnd:

CLC/TC 99X

ICS flokkur:

29.120

Auglýst:

20.4.2022

Umfang (scope):

This document is applicable to specify the requirements for the design and erection of earthing systems of electrical installations, in systems with nominal voltage above 1 kV AC and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended.NOTE 1 The technical and procedural principles of this document can be applied when 3rd parties’ installations and facilities are planned and/or erected in the vicinity of HV electrical power installations.For the purpose of interpreting this document, an electrical power installation is considered to be one of the following:a) substation, including substation for railway power supply;b) electrical power installations on mast, pole and tower;switchgear and/or transformers located outside a closed electrical operating area;c) one (or more) power station(s) located on a single site;the electrical power installation includes generators and transformers with all associated switchgear and all electrical auxiliary systems. Connections between generating stations located on different sites are excluded;d) the electrical system of a factory, industrial plant or other industrial, agricultural, commercial or public premises;e) electrical power installations on offshore facilities for the purpose of generation, transmission, distribution and/or storage of electricity;f) transition towers/poles between overhead lines and underground lines.The electrical power installation includes, among others, the following equipment:— rotating electrical machines;— switchgear;— transformers and reactors;— converters;— cables;— wiring systems;— batteries;— capacitors;— earthing systems;— buildings and fences which are part of a closed electrical operating area;— associated protection, control and auxiliary systems;— large air core reactor.NOTE 2 In general, a standard for an item of equipment takes precedence over this document.This document does not apply to the design and erection of earthing systems of any of the following:— overhead and underground lines between separate installations;NOTE 3 The standard, EN 50341 series Overhead lines exceeding AC 1 kV, specifies requirements for the design and erection of earthing systems in overhead lines.— electrified railway tracks and rolling stock;— mining equipment and installations;— fluorescent lamp installations;— installations on ships and off-shore installations;— electrostatic equipment (e.g. electrostatic precipitators, spray-painting units);— test sites;— medical equipment, e.g. medical X-ray equipment.NOTE 4 The scope of this document does not include the requirements for carrying out live working on electrical power installations.NOTE 5 The scope of this document considers safety requirements for HV installations and its influences on LV installations. For electrical installation up to 1 kV, the standard IEC 60364 series applies.

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ÍST EN 50522:2010 (íslensk þýðing)

Gildir samhliða nýrri útgáfu (ÍST EN 50522:2022) vegna reglugerðar um raforkuvirki nr. 678/2009. (Tók við af ÍST 170:2005, sjá einnig ÍST EN 61936-1:2010) Þessi evrópski staðall tilgreinir kröfur um hönnun og byggingu jarðtengikerfa raforkuvirkja, í kerfum með riðspennu að nafngildi yfir 1 kV og máltíðni allt að 60 Hz, svo að öryggi þeirra sé tryggt og þau gegni truflunarlaust hlutverki sínu við tilætlaða notkun. Raforkuvirki, samkvæmt þessum staðli, er eitt af eftirtöldu: a) Stöð, aðveitustöð, dreifistöð, tengivirki (þar með talið tengivirki fyrir aflgjafa járnbrautar). b) Raforkuvirki á möstrum, staurum og turnum. Rofbúnaður og/eða spennubreytir sem staðsettur er fyrir utan lokað virkjasvæði. c) Aflstöð, orkuver, rafstöð (ein eða fleiri) á sama, takmarkaða svæðinu. Í virkinu eru rafalar og spennubreytar ásamt öllum tengivirkjum, sem fylgja, og öllum rafmagnshjálparkerfum. Tengingar við aflstöðvar á öðrum svæðum eru undanskildar. d) Rafmagnskerfi í verksmiðju, iðjuveri eða á öðru iðna

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