BS IEC 60099-6:2019:2023 Edition

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Surge arresters – Surge arresters containing both series and parallel gapped structures. System voltage of 52 kV and less

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BSI	2023	84

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Categories: 29.240.10 - Substations. Surge arresters, BSI

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Description

IEC 60099-6: 2019 applies to non-linear metal-oxide resistor type surge arresters with spark gaps designed to limit voltage surges on AC power circuits with system voltages Us above 1 kV up to and including 52 kV. This document basically applies to all metal-oxide distribution class surge arresters with internal series and/or parallel gaps and housed in either porcelain or polymeric housings. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:a) A new concept of arrester classification and energy withstand testing was introduced: the line discharge classification was replaced by a classification based on repetitive charge transfer rating (Qrs) and thermal charge transfer rating (Qth). The new concept clearly differentiates between impulse and thermal energy handling capability, which is reflected in the requirements as well as in the related test procedures. b) Power-frequency voltage versus time tests – with and without prior duty – were introduced as type tests. c) Requirements and tests on disconnectors were added. d) Definitions for new terms have been added. e) Clause 10 contains particular requirements for polymer-housed surge arresters. These are indicated in the form of replacements, additions or amendments to the original clauses or subclauses concerned. Keywords: testing of metal-oxide surge arresters

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PDF Pages	PDF Title
2	undefined
4	Blank Page
5	English CONTENTS
10	FOREWORD
12	INTRODUCTION
13	1 Scope 2 Normative references
14	3 Terms and definitions
21	4 Identification and classification 4.1 Arrester identification 4.2 Arrester classification
22	5 Standard ratings and service conditions 5.1 Standard rated voltages 5.2 Standard rated frequencies 5.3 Standard nominal discharge currents 5.4 Service conditions 5.4.1 Normal service conditions Tables Table 1 – Arrester classification Table 2 – Steps of rated voltages
23	5.4.2 Special environmental conditions 6 Requirements 6.1 Insulation withstand 6.2 Residual voltages 6.3 Impulse protective levels 6.4 Internal partial discharges
24	6.5 Seal leak rate 6.6 Thermal stability 6.7 Heat dissipation behaviour of test sample 6.8 Repetitive charge transfer withstand 6.9 Operating duty 6.10 Power-frequency voltage versus time characteristics of an arrester
25	6.11 Short-circuit performance 6.12 Disconnectors 6.12.1 Disconnector withstand 6.12.2 Disconnector operation 6.13 Requirements on internal grading components 6.14 Power-frequency sparkover 6.15 Mechanical loads 6.15.1 General 6.15.2 Bending moment
26	6.15.3 Resistance against environmental stresses 6.15.4 Insulating base and mounting bracket 6.15.5 Mean value of breaking load (MBL) 6.16 Electromagnetic compatibility 6.17 End of life 7 General testing procedures 7.1 Measuring equipment and accuracy 7.2 Test samples 7.2.1 General
27	7.2.2 Samples for residual voltage tests 7.2.3 Samples for the test to verify the repetitive charge transfer rating, Qrs 8 Type tests (design tests) 8.1 General
28	8.2 Insulation withstand tests 8.2.1 General Table 3 – Arrester type tests
29	8.2.2 Tests on individual unit housing 8.2.3 Ambient air conditions during tests 8.2.4 Wet test procedure 8.2.5 Lightning impulse voltage test 8.2.6 Power- frequency voltage test
30	8.3 Impulse protective level tests 8.3.1 General 8.3.2 Residual voltage tests
31	8.3.3 Sparkover tests
33	8.4 Test to verify the repetitive charge transfer rating, Qrs 8.4.1 General 8.4.2 MO resistors Figures Figure 1 – procedure to verify the repetitive charge transfer rating, Qrs, for MO resistors
34	8.4.3 Series gaps
35	8.5 Operating duty tests 8.5.1 General Figure 2 – Procedure to verify the repetitive charge transfer rating, Qrs, for series gaps
36	8.5.2 Test procedure Figure 3 – Test procedure to verify the thermal charge transfer rating, Qth
37	Table 4 – Requirements for high current impulses
38	8.5.3 Rated thermal charge values, Qth 8.6 Power-frequency voltage-versus-time test 8.6.1 General Table 5 – Rated values of thermal charge transfer rating, Qth
39	8.6.2 Test samples 8.6.3 Initial measurements 8.6.4 Test procedure Figure 4 – Test procedure to verify the power frequencyversus time characteristic (TOV test)
40	8.6.5 Test evaluation
41	8.7 Tests of arrester disconnectors 8.7.1 General 8.7.2 Operating withstand test
42	8.7.3 Disconnector operation
43	8.7.4 Mechanical tests 8.7.5 Temperature cycling and seal pumping test 8.8 Power-frequency voltage sparkover tests
44	8.9 Short-circuit tests 8.9.1 General 8.9.2 Preparation of the test samples
46	Table 6 – Test requirements for porcelain housed arresters
47	Figure 5 – Examples of arrester units
48	8.9.3 Mounting of the test sample Figure 6 – Examples of fuse wire locations for “Design A“ arresters Figure 7 – Examples of fuse wire locations for “Design B“ arresters
49	8.9.4 High-current short-circuit tests Figure 8 – Short-circuit test setup for porcelain-housed arresters
50	Table 7 – Required currents for short-circuit tests
51	8.9.5 Low-current short-circuit test 8.9.6 Evaluation of test results
52	8.10 Test of the bending moment 8.10.1 General 8.10.2 Overview 8.10.3 Sample preparation 8.10.4 Test procedure
53	8.10.5 Test evaluation 8.10.6 Test on insulating base and mounting bracket 8.11 Environmental tests 8.11.1 General
54	8.11.2 Sample preparation 8.11.3 Test procedure 8.11.4 Test evaluation 8.12 Seal leak rate test 8.12.1 General 8.12.2 Sample preparation 8.12.3 Test procedure
55	8.12.4 Test evaluation 8.13 Test to verify the dielectric withstand of internal components 8.13.1 General 8.13.2 Test procedure 8.13.3 Test evaluation 8.14 Test of internal grading components 8.14.1 Test to verify long term stability under continuous operating voltage
56	8.14.2 Thermal cyclic test
57	9 Routine tests and acceptance tests 9.1 Routine tests
58	9.2 Acceptance tests 9.2.1 Standard acceptance tests 9.2.2 Special thermal stability test 10 Test requirements on polymer-housed surge arresters 10.1 Scope
59	10.2 Normative references 10.3 Terms and definitions 10.4 Identification and classification 10.5 Standard ratings and service conditions 10.6 Requirements 10.7 General testing procedure
60	10.8 Type tests (design tests) 10.8.1 General 10.8.2 Insulation withstand tests 10.8.3 Impulse protective level tests 10.8.4 Test to verify the repetitive charge transfer rating, Qrs 10.8.5 Operating Duty tests 10.8.6 Power frequency voltage-versus-time test
61	10.8.7 Tests of arrester disconnectors 10.8.8 Power frequency voltage sparkover tests 10.8.9 Short-circuit tests
63	Table 8 – Test requirements for polymer-housed arresters
64	Figure 9 – Short-circuit test setup for polymer-housed arresters
66	10.8.10 Test of the bending moment Figure 10 – Example of a test circuit for re-applying pre-failing circuitimmediately before applying the short-circuit test current
69	Figure 11 – Thermomechanical test
70	Figure 12 – Example of the test arrangement for the thermomechanical testand direction of the cantilever load
71	Figure 13 – Water immersion
72	10.8.11 Environmental tests 10.8.12 Seal leak rate test 10.8.13 Test to verify the dielectric withstand of internal components 10.8.14 Test of internal grading components 10.8.15 Weather ageing test
74	10.9 Routine tests
75	Annex A (normative)Special Environmental Conditions
76	Annex B (normative)Typical information given with enquiries and tenders B.1 Information given with enquiry B.1.1 System data B.1.2 Service conditions B.1.3 Arrester duty
77	B.1.4 Characteristics of arrester B.1.5 Additional equipment and fittings B.1.6 Any special abnormal conditions B.2 Information given with tender
79	Annex C (normative)Mechanical considerations C.1 Test of bending moment Figure C.1 – Bending moment – multi-unit surge arrester
80	C.2 Definition of mechanical loads C.3 Definition of seal leak rate Figure C.2 – Definition of mechanical loads
81	C.4 Calculation of wind-bending-moment Figure C.3 – Surge arrester unit
82	C.5 Procedures of tests of bending moment for porcelain/cast resin and polymer-housed arresters Figure C.4 – Surge-arrester dimensions
83	Figure C.5 – Flow chart of bending moment test procedures

Additional information

Status	Definitive
Pages	84
Publication Date	2023-05-31
ISBN	978 0 580 99924 6
Standard Number	BS IEC 60099-6:2019
Title	Surge arresters – Surge arresters containing both series and parallel gapped structures. System voltage of 52 kV and less
Identical National Standard Of	IEC 60099-6 Ed.2.0
Descriptors	Surge limiters, Materials handling components, Control of specific variables, Defects, Electrical equipment
Publisher	BSI
Committee	PEL/37
ICS Codes	29.240.10 - Substations. Surge arresters

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