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BS EN 61000-4-30:2015:2017 Edition

BS EN 61000-4-30:2015:2017 Edition

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Electromagnetic compatibility (EMC) – Testing and measurement techniques. Power quality measurement methods

Published By Publication Date Number of Pages
BSI 2017 74
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This part of IEC 61000‑4 defines the methods for measurement and interpretation of results for power quality parameters in a.c. power supply systems with a declared fundamental frequency of 50 Hz or 60 Hz.

Measurement methods are described for each relevant parameter in terms that give reliable and repeatable results, regardless of the method’s implementation. This standard addresses measurement methods for in-situ measurements.

Measurement of parameters covered by this standard is limited to conducted phenomena in power systems. The power quality parameters considered in this standard are power frequency, magnitude of the supply voltage, flicker, supply voltage dips and swells, voltage interruptions, transient voltages, supply voltage unbalance, voltage harmonics and interharmonics, mains signalling on the supply voltage, rapid voltage changes, and current measurements. Emissions in the 2 kHz to 150 kHz range are considered in Annex C (informative), and over- and underdeviations are considered in Annex D (informative). Depending on the purpose of the measurement, all or a subset of the phenomena on this list may be measured.

NOTE 1

Test methods for verifying compliance with this standard can be found in IEC 62586‑2 .

NOTE 2

The effects of transducers inserted between the power system and the instrument are acknowledged but not addressed in detail in this standard. Guidance about effects of transducers can be found IEC TR 61869‑103 .

PDF Catalog

PDF Pages PDF Title
6 English

CONTENTS
11 INTRODUCTION
12 1 Scope
2 Normative references
13 3 Terms and definitions
18 4 General
4.1 Classes of measurement
19 4.2 Organization of the measurements
4.3 Electrical values to be measured
4.4 Measurement aggregation over time intervals
Figures

Figure 1 – Measurement chain
20 4.5 Measurement aggregation algorithm
4.5.1 Requirements
4.5.2 150/180-cycle aggregation
4.5.3 10-min aggregation
21 Figure 2 – Synchronization of aggregation intervals for Class A
22 4.5.4 2-hour aggregation
Figure 3 – Synchronization of aggregation intervals for Class S: parameters for which gaps are not permitted
Figure 4 – Synchronization of aggregation intervals for Class S: parameters for which gaps are permitted (see 4.5.2)
23 4.6 Time-clock uncertainty
4.7 Flagging concept
5 Power quality parameters
5.1 Power frequency
5.1.1 Measurement method
24 5.1.2 Measurement uncertainty and measuring range
5.1.3 Measurement evaluation
5.1.4 Aggregation
5.2 Magnitude of the supply voltage
5.2.1 Measurement method
5.2.2 Measurement uncertainty and measuring range
25 5.2.3 Measurement evaluation
5.2.4 Aggregation
5.3 Flicker
5.3.1 Measurement method
5.3.2 Measurement uncertainty and measuring range
5.3.3 Measurement evaluation
5.3.4 Aggregation
26 5.4 Supply voltage dips and swells
5.4.1 Measurement method
5.4.2 Detection and evaluation of a voltage dip
27 5.4.3 Detection and evaluation of a voltage swell
28 5.4.4 Calculation of a sliding reference voltage
5.4.5 Measurement uncertainty and measuring range
5.5 Voltage interruptions
5.5.1 Measurement method
29 5.5.2 Evaluation of a voltage interruption
5.5.3 Measurement uncertainty and measuring range
5.5.4 Aggregation
5.6 Transient voltages
5.7 Supply voltage unbalance
5.7.1 Measurement method
30 5.7.2 Measurement uncertainty and measuring range
5.7.3 Measurement evaluation
Figure 5 – Example of supply voltage unbalance uncertainty
31 5.7.4 Aggregation
5.8 Voltage harmonics
5.8.1 Measurement method
5.8.2 Measurement uncertainty and measuring range
32 5.8.3 Measurement evaluation
5.8.4 Aggregation
5.9 Voltage interharmonics
5.9.1 Measurement method
5.9.2 Measurement uncertainty and measuring range
5.9.3 Evaluation
5.9.4 Aggregation
33 5.10 Mains signalling voltage on the supply voltage
5.10.1 General
5.10.2 Measurement method
5.10.3 Measurement uncertainty and measuring range
5.10.4 Aggregation
5.11 Rapid voltage change (RVC)
5.11.1 General
34 5.11.2 RVC event detection
35 5.11.3 RVC event evaluation
Figure 6 – RVC event: example of a change in r.m.s voltage that results in an RVC event
36 5.11.4 Measurement uncertainty
5.12 Underdeviation and overdeviation
5.13 Current
5.13.1 General
Figure 7 – Not an RVC event: example of a change in r.m.s voltage that does not result in an RVC event because the dip threshold is exceeded
37 5.13.2 Magnitude of current
5.13.3 Current recording
38 5.13.4 Harmonic currents
5.13.5 Interharmonic currents
5.13.6 Current unbalance
6 Performance verification
39 Tables
Table 1 – Summary of requirements (see subclauses for actual requirements)
41 Annexes
Annex A (informative) Power quality measurements –Issues and guidelines
A.1 General
A.2 Installation precautions
A.2.1 General
A.2.2 Test leads
42 A.2.3 Guarding of live parts
A.2.4 Monitor placement
43 A.2.5 Earthing
A.2.6 Interference
A.3 Transducers
A.3.1 General
44 A.3.2 Signal levels
45 A.3.3 Frequency response of transducers
A.3.4 Transducers for measuring transients
46 A.4 Transient voltages and currents
A.4.1 General
A.4.2 Terms and definitions
A.4.3 Frequency and amplitude characteristics of a.c. mains transients
47 A.4.4 Transient voltage detection
Figure A.1 – Frequency spectrum of typical representative transient test waveforms
48 A.4.5 Transient voltage evaluation
A.4.6 Effect of surge protective devices on transient measurements
A.5 Voltage dip characteristics
A.5.1 General
49 A.5.2 Rapidly updated r.m.s values
A.5.3 Phase angle/point-on-wave
A.5.4 Voltage dip unbalance
50 A.5.5 Phase shift during voltage dip
A.5.6 Missing voltage
A.5.7 Distortion during voltage dip
A.5.8 Other characteristics and references
51 Annex B (informative) Power quality measurement – Guidance for applications
B.1 Contractual applications of power quality measurements
B.1.1 General
B.1.2 General considerations
52 B.1.3 Specific considerations
55 B.2 Statistical survey applications
B.2.1 General
B.2.2 Considerations
56 B.2.3 Power quality indices
B.2.4 Monitoring objectives
B.2.5 Economic aspects of power quality surveys
58 B.3 Locations and types of surveys
B.3.1 Monitoring locations
B.3.2 Pre-monitoring site surveys
B.3.3 Customer side site survey
B.3.4 Network side survey
59 B.4 Connections and quantities to measure
B.4.1 Equipment connection options
B.4.2 Priorities: Quantities to measure
60 B.4.3 Current monitoring
B.5 Selecting the monitoring thresholds and monitoring period
B.5.1 Monitoring thresholds
B.5.2 Monitoring period
61 B.6 Statistical analysis of the measured data
B.6.1 General
B.6.2 Indices
B.7 Trouble-shooting applications
B.7.1 General
B.7.2 Power quality signatures
63 Annex C (informative) Conducted emissions in the 2 kHz to 150 kHz range
C.1 General
C.2 Measurement method – 2 kHz to 9 kHz
64 C.3 Measurement method – 9 kHz to 150 kHz
65 C.4 Measurement range and measurement uncertainty
C.5 Aggregation
66 Annex D (informative) Underdeviation and overdeviation
D.1 General
D.2 Measurement method
D.3 Measurement uncertainty and measuring range
D.4 Aggregation
68 Annex E (informative) Class B Measurement Methods
E.1 Background for Class B
E.2 Class B – Measurement aggregation over time intervals
E.3 Class B – Measurement aggregation algorithm
E.4 Class B – Real time clock (RTC) uncertainty
E.4.1 General
E.4.2 Class B – Frequency – Measurement method
E.4.3 Class B – Frequency – Measurement uncertainty
69 E.4.4 Class B – Frequency – Measurement evaluation
E.4.5 Class B – Magnitude of the supply – Measurement method
E.4.6 Class B – Magnitude of the supply – Measurement uncertainty and measuring range
E.5 Class B – Flicker
E.5.1 General
E.5.2 Class B – Supply voltage dips and swells – Measurement method
E.6 Class B – Voltage interruptions
E.6.1 General
E.6.2 Class B – Supply voltage unbalance – Measurement method
E.6.3 Class B – Supply voltage unbalance –Uncertainty
E.6.4 Class B – Voltage harmonics – Measurement method
E.6.5 Class B –Voltage harmonics – Measurement uncertainty and range
70 E.6.6 Class B – Voltage interharmonics – Measurement method
E.6.7 Class B –Voltage interharmonics – Measurement uncertainty and range
E.6.8 Class B – Mains signalling voltage – Measurement method
E.6.9 Class B –Mains signalling voltage – Measurement uncertainty and range
E.6.10 Class B – Current – Measurement method
E.6.11 Class B – Current – Measurement uncertainty and range
71 Bibliography

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