IEC 61000-4-12:2017 is also available as /2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61000-4-12:2017 relates to the immunity requirements and test methods for electrical and electronic equipment, under operational conditions, to ring waves occurring in low-voltage power, control and signal lines supplied by public and non-public networks. The object of this document is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to ring waves. The test method documented in this part of IEC 61000 describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon. It has the status of a basic EMC publication in accordance with IEC Guide 107. This edition includes the following significant technical changes with respect to the previous edition: a) addition of a mathematical modelling of ring wave waveform; b) new Annex B on selection of generators and test levels; c) new Annex C on explanatory notes; d) new Annex D on measurement uncertainty; e) addition of high speed CDN; f) addition of a calibration procedure for CDN.

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PDF Pages	PDF Title
68	National foreword
73	English CONTENTS
76	FOREWORD
78	INTRODUCTION
79	1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions
81	3.2 Abbreviated terms 4 General 4.1 Description of the phenomenon
83	4.2 Relevant parameters 4.2.1 Repetition rate 4.2.2 Phase angle Figures Figure 1 – Waveform of the ring wave (open-circuit voltage and short-circuit current)
84	5 Test levels 6 Test instrumentation 6.1 Ring wave generator 6.1.1 Ring wave generator circuit Tables Table 1 – Test levels
85	6.1.2 Impedance values 6.1.3 Performance characteristics of the ring wave generator Figure 2 – Example of schematic circuit of the ring wave generator
86	6.1.4 Calibration of the ring wave generator 6.2 Coupling/decoupling networks 6.2.1 General Table 2 – Relationship between peak open-circuit voltage and peak short-circuit current
87	6.2.2 Coupling/decoupling networks for AC/DC power port rated up to 63 A per line Figure 3 – Selection of coupling/decoupling method
88	Figure 4 – Example of coupling network and decoupling network for capacitive coupling on AC/DC lines: line-to-line coupling Table 3 – Ring wave specification at the EUT power portof the CDN
89	Figure 5 – Example of coupling network and decoupling network for capacitive coupling on AC/DC lines: line-to-ground coupling Figure 6 – Example of coupling network and decoupling network for capacitive coupling on AC lines (three phases): line L3-to-line L2 coupling
90	6.2.3 Coupling/decoupling networks for interconnection lines Figure 7 – Example of coupling network and decoupling network for capacitive coupling on AC lines (three phases):line L3-to-ground coupling
91	Figure 8 – Example of coupling network and decoupling network for unshielded unsymmetrical interconnection lines: line-to-line and line-to-ground coupling
92	Figure 9 – Example of coupling and decoupling network for unshielded symmetrical interconnection lines: lines-to-ground coupling
93	6.3 Calibration of coupling/decoupling networks 6.3.1 General 6.3.2 Calibration of CDNs for AC/DC power port rated up to 63 A per line Figure 10 – Example of coupling and decoupling network for unshielded symmetrical interconnection lines: lines-to-ground coupling via capacitors
94	6.3.3 Calibration of CDNs for interconnection lines
95	Table 4 – Summary of calibration process for CDNs for unsymmetrical interconnection lines
96	Table 5 – Ring wave waveform specifications at the EUT port of the CDN for unsymmetrical interconnection lines
97	7 Test setup 7.1 Test equipment Table 6 – Summary of calibration process for CDNs for symmetrical interconnection lines Table 7 – Ring wave waveform specifications at the EUT port of the CDN for symmetrical interconnection lines
98	7.2 Verification of the test instrumentation 7.3 Test setup for ring waves applied to EUT power ports
99	7.4 Test setup for ring waves applied to unshielded unsymmetrical interconnection lines 7.5 Test setup for ring waves applied to unshielded symmetrical interconnectionlines 7.6 Test setup for ring waves applied to shielded lines
100	7.7 Protective earth connection Figure 11 – Example of test setup for ring waves applied to shielded lines
101	8 Test procedure 8.1 General 8.2 Laboratory reference conditions 8.2.1 Climatic conditions 8.2.2 Electromagnetic conditions 8.3 Execution of the test
102	9 Evaluation of test results
103	10 Test report
104	Annexes Annex A (informative) Information on electromagnetic environments, installation classes and test levels
106	Annex B (informative) Selection of generators and test levels B.1 General B.2 The classification of environments B.3 The definition of port types
107	B.4 Selection of the test levels Table B.1 – Power ports: Selection of the test levels (depending on the installation class)
108	Table B.2 – Circuits/lines: Selection of the test levels (depending on the installation class)
109	Annex C (informative) Explanatory notes C.1 Different source impedance C.2 Application of the tests C.2.1 Equipment level immunity C.2.2 System level immunity
110	Annex D (informative) Measurement uncertainty (MU) considerations D.1 General D.2 Legend for ring wave parameters
111	D.3 Uncertainty contributors to the ring wave measurement uncertainty D.4 Uncertainty of the generator output voltage and current measurement D.4.1 General D.4.2 Rise time of the ring wave
112	Table D.1 – Example of uncertainty budget for ring wave rise time (T1)
113	D.4.3 Peak of the ring wave Table D.2 – Example of uncertainty budget for the peak of the short-circuit current of the ring wave (IPk1)
114	D.4.4 Further MU contributions to time measurements D.4.5 Rise time of the step response and bandwidth of the frequency response of the measuring system
115	D.4.6 Impulse peak and width distortion due to the limited bandwidth of the measuring system Table D.3 – α factor (Formula (D.3)) of different unidirectional impulse responses corresponding to the same bandwidth of the system B
116	D.5 Application of uncertainties in the ring waveform compliance criterion
117	Bibliography

Published By	Publication Date	Number of Pages
BSI	2020	120


PDF Format	Searchable	Printable	Preview Now

Status	Under Review
Pages	120
Publication Date	2020-02-25
ISBN	978 0 539 09307 0
Standard Number	BS EN 61000-4-12:2017 – TC
Title	Tracked Changes. Electromagnetic Compatibility (EMC) – Testing and measurement techniques. Ring wave immunity test
Descriptors	Electronic power supplies, Electromagnetic radiation, Wave properties and phenomena, Performance testing, Testing conditions, Electronic equipment and components, Electromagnetic compatibility, Waveforms, Circuits, Test equipment, Oscillations, Electric power system disturbances, Electrical equipment, Electromagnetic fields, Electrical testing, Electrical impedance, Waves, Voltage
Publisher	BSI
Committee	GEL/210
ICS Codes	33.100.20 - Immunity

BS EN 61000-4-12:2017 – TC:2020 Edition

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BS EN 61000-4-12:2017