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BS EN IEC 60099-8:2018

$215.11

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

Published By Publication Date Number of Pages
BSI 2018 72
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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 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.

Status

Definitive

Pages

72

Publication Date

2018-04-30

ISBN

978 0 580 97606 3

Standard Number

BS EN IEC 60099-8:2018

Title

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

Identical National Standard Of

IEC 60099-8:2017, EN IEC 60099-8:2018

Replaces

BS EN 60099-8:2011

Descriptors

Electric 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

Publisher

BSI

Committee

PEL/37

ICS Codes 25.040.40 - Industrial process measurement and control
BS EN IEC 60099-8:2018
$215.11