CONTENTS
INTRODUCTION.....................................................................................................................4
1 Scope...............................................................................................................................5
2 Normative references........................................................................................................5
3 Definitions ........................................................................................................................6
4 General ..........................................................................................................................10
4.1 Classes of measurement performance ...................................................................10
4.2 Organization of the measurements.........................................................................10
4.3 Electrical values to be measured............................................................................10
4.4 Measurement aggregation over time intervals ........................................................11
4.5 Measurement aggregation algorithm ......................................................................11
4.6 Time-clock uncertainty...........................................................................................12
4.7 Flagging concept ...................................................................................................12
5 Power quality parameters................................................................................................13
5.1 Power frequency....................................................................................................13
5.2 Magnitude of the supply voltage .............................................................................13
5.3 Flicker ...................................................................................................................14
5.4 Supply voltage dips and swells...............................................................................15
5.5 Voltage interruptions..............................................................................................17
5.6 Transient voltages .................................................................................................18
5.7 Supply voltage unbalance ......................................................................................18
5.8 Voltage harmonics .................................................................................................19
5.9 Voltage interharmonics ..........................................................................................19
5.10 Mains signalling voltage on the supply voltage .......................................................20
5.11 Rapid voltage changes...........................................................................................20
5.12 Measurement of underdeviation and overdeviation parameters...............................20
6 Range of influence quantities and implementation verification .........................................21
6.1 Range of influence quantities .................................................................................21
6.2 Implementation verification ....................................................................................22
Annex A (informative) Power quality measurements – Issues and guidelines.........................24
A.1 Installation precautions ..........................................................................................24
A.2 Transducers ..........................................................................................................27
A.3 Transient voltages and currents .............................................................................30
A.4 Rapid voltage changes...........................................................................................33
A.5 Current ..................................................................................................................33
A.6 Guidelines for contractual applications of power quality measurements ..................36
A.7 Trouble-shooting applications ................................................................................40
A.8 Statistical survey applications ................................................................................41
A.9 Voltage dip characteristics .....................................................................................42
Annex ZA (normative) Normative references to international publications with their
corresponding European publications ....................................................................................45
Bibliography ..........................................................................................................................47
Page 3
EN 61000−4−30:2003
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Sat Mar 17 20:09:07 GMT+00:00 2007, Uncontrolled Copy, (c) BSI
