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  • BSI
    BS EN 60099-8:2011 Surge arresters - Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV
    Edition: 2011
    $526.05
    / user per year

Description of BS EN 60099-8:2011 2011

This part of IEC 60099 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 standard defines surge arresters to protect the insulator assembly from lightning-caused overvoltages only. Therefore, and since the metal-oxide resistors are not permanently connected to the line, the following items are not considered for this standard:

  • switching impulse sparkover 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 standard.



Standard NumberBS EN 60099-8:2011
TitleSurge arresters - Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV
StatusWithdrawn
Publication Date2011-06-30
Withdrawn Date2018-04-26
Replaced ByBS EN IEC 60099-8:2018
Identical National Standard OfEN 60384-14-2:2004, EN 60099-8:2011, IEC 60099-8:2011, IEC 60384-14-2:2004, EN 60529 Corr 2 (12/16) IEC AS
DescriptorsMetals, Overvoltage protection, Approval testing, Overhead power lines, High-voltage tests, Overvoltage tests, Alternating current, Electrical testing, Impulse-voltage tests, Surge protection, Electrical protection equipment, Oxides, Lightning protection, Thermal testing, Short-circuit current tests, Electric insulators, Withstand voltage, Ratings, Surge limiters
ICS29.120.50 Fuses and other overcurrent protection devices, 29.240.10 Substations. Surge arresters
CommitteePEL/37
ISBN978 0 580 63047 7
PublisherBSI
Pages66

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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