IEC TR 60099-10:2024

IEC TR 60099-10 ®
Edition 1.0 2024-06
TECHNICAL
REPORT
colour
inside
Surge arresters –
Part 10: Rationale for tests specified by IEC 60099-4:2014
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IEC TR 60099-10 ®
Edition 1.0 2024-06
TECHNICAL
REPORT
colour
inside
Surge arresters –
Part 10: Rationale for tests specified by IEC 60099-4:2014
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50; 29.240.10 ISBN 978-2-8322-8969-3
– 2 – IEC TR 60099-10:2024 © IEC 2024
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 10
4 Structure of the document . 10
4.1 Content of each individual test rationale. 10
4.2 Relation between each test of IEC 60099-4:2014 and this document . 11
5 Insulation withstand tests rationale . 12
5.1 Arrester type for which the tests are applicable . 12
5.2 Purpose of the tests . 12
5.3 Historical notes . 12
5.4 Tests rationale . 12
5.4.1 General . 12
5.4.2 Sample selection rationale . 13
5.4.3 Test procedure rationale . 15
5.4.4 Evaluation rationale . 18
5.4.5 Common misunderstandings . 18
6 Residual voltage tests rationale . 19
6.1 Arrester type for which the tests are applicable . 19
6.2 Purpose of the tests . 19
6.3 Historical notes . 19
6.4 Tests rationale . 19
6.4.1 General . 19
6.4.2 Sample selection rationale . 20
6.4.3 Tests procedures rationale . 20
6.4.4 Evaluation rationale . 23
7 Test to verify long term stability under continuous operating voltage rationale . 23
7.1 Arrester type for which the test is applicable . 23
7.2 Purpose of the test . 23
7.3 Historical notes . 23
7.4 Test rationale . 24
7.4.1 General . 24
7.4.2 Sample selection rationale . 25
7.4.3 Test procedure rationale . 26
7.4.4 Evaluation rationale . 26
8 Test to verify the repetitive charge transfer rating (Q ) rationale . 26
rs
8.1 Arrester type for which the test is applicable . 26
8.2 Purpose of the test . 26
8.3 Historical notes . 26
8.4 Test rationale . 27
8.4.1 General . 27
8.4.2 Sample selection rationale . 27
8.4.3 Test procedure rationale . 27
8.4.4 Evaluation rationale . 28
8.4.5 Common misunderstandings . 28

9 Heat dissipation behavior of test sample rationale . 29
9.1 Arrester type for which the test is applicable . 29
9.2 Purpose of the test . 29
9.3 Historical notes . 29
9.4 Test rationale . 29
9.4.1 General . 29
9.4.2 Sample selection rationale . 30
9.4.3 Test procedure rationale . 30
9.4.4 Evaluation rationale . 30
10 Operating duty test rationale . 31
10.1 Arrester type for which the test is applicable . 31
10.2 Purpose of the test . 31
10.3 Historical notes . 31
10.4 Test rationale . 32
10.4.1 General . 32
10.4.2 Sample selection rationale . 32
10.4.3 Test procedure rationale . 32
10.4.4 Evaluation rationale . 34
10.4.5 Common misunderstandings . 35
11 Power-frequency voltage-versus-time test rationale . 35
11.1 Arrester type for which the test is applicable . 35
11.2 Purpose of the test . 35
11.3 Historical notes . 36
11.4 Test rationale . 36
11.4.1 General . 36
11.4.2 Sample selection rationale . 36
11.4.3 Test procedure rationale . 36
11.4.4 Evaluation rationale . 37
11.4.5 Common misunderstandings . 37
12 Tests of arrester disconnector rationale . 37
12.1 Arrester type for which the tests are applicable . 37
12.2 Purpose of the tests . 37
12.3 Historical notes . 38
12.4 Tests rationale . 38
12.4.1 General . 38
12.4.2 Sample selection rationale . 38
12.4.3 Tests procedure rationale . 38
12.4.4 Evaluation rationale . 38
13 Short-circuit tests rationale . 39
13.1 Arrester type for which the test is applicable . 39
13.2 Purpose of the test . 39
13.3 Historical notes . 39
13.4 Test rationale . 40
13.4.1 General . 40
13.4.2 Sample selection rationale . 41
13.4.3 Test procedure rationale . 41
13.4.4 Evaluation rationale . 43
13.4.5 Common misunderstandings . 44

– 4 – IEC TR 60099-10:2024 © IEC 2024
14 Test of the bending moment of porcelain-housed arresters rationale . 44
14.1 Arrester type for which the test is applicable . 44
14.2 Purpose of the test .
...