This part of IEC 61000 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.

NOTE

As described in IEC Guide 107 , this is a basic EMC publication for use by product committees of the IEC. As also stated in Guide 107, the IEC product committees are responsible for determining whether this immunity test standard is applied or not, and if applied, they are responsible for determining the appropriate test levels and performance criteria. TC 77 and its sub-committees are prepared to co-operate with product committees in the evaluation of the value of particular immunity test and test levels for their products.

This document defines:

test voltage and current waveforms;
a range of test levels;
test equipment;
test setups;
test procedures.

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PDF Pages	PDF Title
2	National foreword
7	English CONTENTS
10	FOREWORD
12	INTRODUCTION
13	1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions
15	3.2 Abbreviated terms 4 General 4.1 Description of the phenomenon
17	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)
18	5 Test levels 6 Test instrumentation 6.1 Ring wave generator 6.1.1 Ring wave generator circuit Tables Table 1 – Test levels
19	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
20	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
21	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
22	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
23	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
24	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
25	Figure 8 – Example of coupling network and decoupling network for unshielded unsymmetrical interconnection lines: line-to-line and line-to-ground coupling
26	Figure 9 – Example of coupling and decoupling network for unshielded symmetrical interconnection lines: lines-to-ground coupling
27	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
28	6.3.3 Calibration of CDNs for interconnection lines
29	Table 4 – Summary of calibration process for CDNs for unsymmetrical interconnection lines
30	Table 5 – Ring wave waveform specifications at the EUT port of the CDN for unsymmetrical interconnection lines
31	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
32	7.2 Verification of the test instrumentation 7.3 Test setup for ring waves applied to EUT power ports
33	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
34	7.7 Protective earth connection Figure 11 – Example of test setup for ring waves applied to shielded lines
35	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
36	9 Evaluation of test results
37	10 Test report
38	Annexes Annex A (informative) Information on electromagnetic environments, installation classes and test levels
40	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
41	B.4 Selection of the test levels Table B.1 – Power ports: Selection of the test levels (depending on the installation class)
42	Table B.2 – Circuits/lines: Selection of the test levels (depending on the installation class)
43	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
44	Annex D (informative) Measurement uncertainty (MU) considerations D.1 General D.2 Legend for ring wave parameters
45	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
46	Table D.1 – Example of uncertainty budget for ring wave rise time (T1)
47	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)
48	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
49	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
50	D.5 Application of uncertainties in the ring waveform compliance criterion
51	Bibliography

Published By	Publication Date	Number of Pages
BSI	2017	52


PDF Format	Searchable	Printable	Preview Now

Status	Under Review
Pages	52
Publication Date	2017-11-20
ISBN	978 0 580 93964 8
Standard Number	BS EN 61000-4-12:2017
Title	Electromagnetic Compatibility (EMC) – Testing and measurement techniques. Ring wave immunity test
Identical National Standard Of	EN 61000-4-12:2017, CLC/TR 62685:2011, IEC 61000-4-12:2017
Replaces	BS EN 61000-4-12:2006
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

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