BS EN IEC 60099-8:2018 - Surge arresters. Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV

BS EN IEC 60099-8:2018

Surge arresters. Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV

Status : Current   Published : April 2018




IEC 60099-8:2017 is available as

IEC 60099-8:2017 RLV

which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60099-8:2017 covers metal-oxide surge arresters with external series gap (externally gapped line arresters (EGLA)) that are applied on overhead transmission and distribution lines, only to protect insulator assemblies from lightning-caused flashovers.  This document defines surge arresters to protect the insulator assembly from lightning-caused over-voltages only. Therefore, and since metal-oxide resistors are not permanently connected to the line, the following items are not considered for this document: - switching impulse spark-over voltage; - residual voltage at steep current and switching current impulse; - thermal stability; - long-duration current impulse withstand duty; - power-frequency voltage versus time characteristics of an arrester; - disconnector test; - aging duties by power-frequency voltage. Considering the particular design concept and the special application on overhead transmission and distribution lines, some unique requirements and tests are introduced, such as the verification test for coordination between insulator withstand and EGLA protective level, the follow current interrupting test, mechanical load tests, etc. Designs with the EGLA's external series gap installed in parallel to an insulator are not covered by this document. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: The Lightning discharge capability test has been completely re-written and re-named to Test to verify the repetitive charge transfer rating, Qrs with lightning discharges to reflect changes introduced in IEC 60099-4 Ed.3 (2014) regarding new methods for rating the energy and charge handling capability of metal-oxide arresters. In addition to testing to evaluate the performance of the MO resistors, procedures for evaluating the performance of the EGLA series gaps have been introduced. - Omissions from Ed. 1 of this standard have been included, notably an RIV test and a means for determining the thermal time constant of the SUV portion of the EGLA. - Definitions for new terms have been added - A number of NOTES in Ed. 1 have been converted to normative requirements Keywords: externally gapped line arresters (EGLA), lightning-caused over-voltages

Standard NumberBS EN IEC 60099-8:2018
TitleSurge arresters. Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV
Publication Date30 April 2018
Normative References(Required to achieve compliance to this standard)ISO 4892-1, EN ISO 4287, EN 62217:2013, IEC 60068-2-11:1981, IEC 60060-1:2010, EN 60099-4:2004, IEC 62217:2012, EN 60060-1:2010, EN 60507:2014, EN 60270 (IEC 60270:2000 Adopted), IEC 60068-2-14:2009, IEC 60507:2013, EN 60068-2-14:2009, IEC TS 60815-1:2008, IEC 60270:2000, IEC 60060-2:2010, EN 60060-2:2011, EN 60068-2-11:1999, IEC 60099-4:2014, EN ISO 4892-3, EN ISO 4892-2, ISO 4892-2, EN ISO 4892-1, ISO 4892-3, ISO 4287
Informative References(Provided for Information)EN ISO 3274, IEEE C62.11, ISO 3274
ReplacesBS EN 60099-8:2011
International RelationshipsEN IEC 60099-8:2018,IEC 60099-8:2017
Draft Superseded By17/30356577 DC
DescriptorsElectric insulators, Lightning protection, Metals, High-voltage tests, Electrical protection equipment, Surge limiters, Oxides, Overvoltage tests, Overvoltage protection, Withstand voltage, Short-circuit current tests, Ratings, Thermal testing, Electrical testing, Surge protection, Overhead power lines, Impulse-voltage tests, Approval testing, Alternating current
Title in FrenchParafoudres Parafoudres à oxyde métallique avec éclateur extérieur en série (EGLA) pour lignes aériennes de transmission et de distribution de réseaux à courant alternatif de plus de 1 kV
Title in GermanÜberspannungsableiter Metalloxid-Überspannungsableiter mit externer Serienfunkenstrecke (EGLA) für Übertragungs- und Verteilungsleitungen von Wechselstromsystemen über 1 kV
ISBN978 0 580 97606 3
File Size2.914 MB

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