EN 60099-4:2014

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Identification and classification
5 Standard ratings and service conditions
6 Requirements
7 General testing procedure
8 Type tests (design tests)
9 Routine tests and acceptance tests
10 Test requirements on polymer-housed surge arresters
11 Test requirements on gas-insulated metal enclosed
   arresters (GIS-arresters)
12 Separable and dead-front arresters
13 Liquid-immersed arresters
Annex A (normative) - Abnormal service conditions
Annex B (normative) - Test to verify thermal equivalency
        between complete arrester and arrester section
Annex C (normative) - Artificial pollution test with respect
        to the thermal stress on porcelain housed multi-unit
        metal-oxide surge arresters
Annex D (informative) - Typical information given with
        enquiries and tenders
Annex E (informative) - Ageing test procedure - Arrhenius
        law - Problems with higher temperatures
Annex F (informative) - Guide for the determination of the
        voltage distribution along metal-oxide surge arresters
Annex G (normative) - Mechanical considerations
Annex H (normative) - Test procedure to determine the
        lightning impulse discharge capability
Annex I (normative) - Determination of the start temperature
        in tests including verification of thermal stability
Annex J (normative) - Determination of the average
        temperature of a multi-unit highvoltage arrester
Annex K (informative) - Example calculation of test
        parameters for the operating duty test (8.7)
        according to the requirements of 7.3
Annex L (informative) - Comparison of the old energy
        classification system based on line discharge classes
        and the new classification system based on thermal
        energy ratings for operating duty tests and repetitive
        charge transfer ratings for repetitive single event
        energies
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 60099-4:2014 applies to non-linear metal-oxide resistor type surge arresters without spark gaps designed to limit voltage surges on a.c. power circuits with Us above 1 kV. This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. The numerous changes between the second and third editions are listed in the Foreward of the document.Keywords: testing of gapless metal-oxide surge arresters for a.c.power systems