IEC 62561-3:2017

IEC 62561-3 ®
Edition 2.0 2017-06
INTERNATIONAL
STANDARD
Lightning protection system components (LPSC) –
Part 3: Requirements for isolating spark gaps (ISG)

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IEC 62561-3 ®
Edition 2.0 2017-06
INTERNATIONAL
STANDARD
Lightning protection system components (LPSC) –

Part 3: Requirements for isolating spark gaps (ISG)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 91.120.40 ISBN 978-2-8322-4455-5

– 2 – IEC 62561-3:2017 © IEC 2017

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms and definitions . 8

4 Classification . 9

4.1 According to ISGs capability to withstand lightning current . 9

4.2 According to ISGs location installation . 9
5 Requirements . 10
5.1 General . 10
5.2 Environmental requirements . 10
5.3 Installation instructions . 10
5.4 Lightning current carrying capability . 10
5.5 Rated impulse sparkover voltage . 10
5.6 Rated withstand voltage . 10
5.6.1 Rated DC withstand voltage . 10
5.6.2 Rated power frequency withstand voltage . 10
5.7 Isolation resistance . 10
5.8 Marking . 11
5.9 UV (ultraviolet) resistance . 11
6 Tests . 11
6.1 General conditions for tests . 11
6.2 UV (ultraviolet) light test . 12
6.3 Resistance tests to corrosion . 12
6.4 Mechanical tests . 12
6.5 Electrical tests . 14
6.5.1 Isolation resistance . 14
6.5.2 Withstand voltage . 14
6.5.3 Rated impulse sparkover voltage . 15
6.5.4 Lightning current . 15
6.6 Installation instructions . 16
6.6.1 General conditions for tests . 16

6.6.2 Acceptance criteria . 16
6.7 Marking test . 16
6.7.1 General conditions for tests . 16
6.7.2 Acceptance criteria . 16
7 Electromagnetic compatibility (EMC) . 16
8 Structure and content of the test report . 16
8.1 General . 16
8.2 Report identification . 17
8.3 Specimen description . 17
8.4 Standards and references . 17
8.5 Test procedure . 17
8.6 Testing equipment description . 18
8.7 Measuring instruments description . 18
8.8 Results and parameters recorded . 18

8.9 Statement of pass/fail . 18

Annex A (normative) Flow chart of tests . 19

Annex B (normative) Environmental test for isolating spark gaps . 21

B.1 General . 21

B.2 Salt mist treatment . 21

B.3 Humid sulphurous atmosphere treatment . 21

B.4 Ammonia atmosphere treatment. 21

Annex C (normative) Environmental test for outdoor isolating spark gaps –

Resistance to ultraviolet light . 22

C.1 General . 22
C.2 The tests . 22
C.3 First alternative test to C.2 . 22
C.4 Second alternative test to C.2 . 22
Bibliography . 23

Figure 1 – Pendulum hammer test apparatus . 13
Figure A.1 – Flow chart of the sequence of tests for ISGs . 20

Table 1 – Lightning impulse current (I ) parameters . 15
imp
– 4 – IEC 62561-3:2017 © IEC 2017

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
LIGHTNING PROTECTION SYSTEM COMPONENTS (LPSC) –

Part 3: Requirements for isolating spark gaps (ISG)

FOREWORD
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