IEC 60034-27-1:2017 provides a common basis for: – measuring techniques and instruments; – the arrangement of test circuits; – normalization and testing procedures; – noise reduction; – the documentation of test results; – the interpretation of test results, with respect to partial discharge off-line measurements on the winding insulation of rotating electrical machines. This International Standard cancels and replaces IEC TS 60034-27 (2006). It constitutes a technical revision and reflects numerous improvements and corrections with respect to the previous publication.<\/p>\n
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| 84<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 89<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 92<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 94<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 96<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 97<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 99<\/td>\n | 4 Nature of PD in rotating machines 4.1 Basics of PD <\/td>\n<\/tr>\n | ||||||
| 100<\/td>\n | 4.2 Types of PD in rotating machines 4.2.1 General 4.2.2 Internal discharges 4.2.3 Slot discharges <\/td>\n<\/tr>\n | ||||||
| 101<\/td>\n | 4.2.4 End-winding gap and surface discharges 4.2.5 Foreign conductive materials discharges 4.3 Pulse propagation in windings <\/td>\n<\/tr>\n | ||||||
| 102<\/td>\n | 5 Measuring technologies and instrumentation 5.1 General 5.2 Influence of frequency response of measuring system <\/td>\n<\/tr>\n | ||||||
| 103<\/td>\n | 5.3 Effects of PD coupling units Figures Figure 1 \u2013 Frequency response of a PD pulse and coupling unitsof various time constants <\/td>\n<\/tr>\n | ||||||
| 104<\/td>\n | 5.4 Effect of the measuring instrument 6 Visualization of measurements 6.1 General 6.2 Minimum scope of PD data presentation <\/td>\n<\/tr>\n | ||||||
| 105<\/td>\n | 6.3 Additional means of PD data representation 6.3.1 General Figure 2 \u2013 PD magnitude as a function of the normalizedtest voltage Q=f(U\/Umax) <\/td>\n<\/tr>\n | ||||||
| 106<\/td>\n | 6.3.2 Partial discharge pattern 7 Test circuits 7.1 General Figure 3 \u2013 Example of a PRPD pattern <\/td>\n<\/tr>\n | ||||||
| 107<\/td>\n | 7.2 Individual winding components <\/td>\n<\/tr>\n | ||||||
| 108<\/td>\n | 7.3 Complete windings 7.3.1 General Figure 4 \u2013 Basic test circuits in accordance with IEC 60270 <\/td>\n<\/tr>\n | ||||||
| 109<\/td>\n | 7.3.2 Standard measurements (SX.X) Figure 5 \u2013 Test circuit for PD measurement (S1.1)on complete windings Tables Table 1 \u2013 Connection configuration S1 for open star point <\/td>\n<\/tr>\n | ||||||
| 110<\/td>\n | 7.3.3 Optional, extended measurements (EX.X) Table 2 \u2013 Connection configuration S2 for closed star point Table 3 \u2013 Connection configuration E1 for open star point <\/td>\n<\/tr>\n | ||||||
| 111<\/td>\n | 7.3.4 Using integrated test equipment (IX.X) Table 4 \u2013 Connection configuration E2 for closed star point Table 5 \u2013 Connection configuration I1 for integrated equipment and open star point, measurement on high voltage side <\/td>\n<\/tr>\n | ||||||
| 112<\/td>\n | 8 Normalization of measurements 8.1 General Table 6 \u2013 Connection configuration I2 for integrated equipment and open star point, measurement on star point side Table 7 \u2013 Connection configuration I3 for integrated equipment and closed star point <\/td>\n<\/tr>\n | ||||||
| 113<\/td>\n | 8.2 Individual winding components 8.3 Complete windings <\/td>\n<\/tr>\n | ||||||
| 114<\/td>\n | Figure 6 \u2013 Normalization of the test circuit for measurement S1.1 <\/td>\n<\/tr>\n | ||||||
| 115<\/td>\n | 9 Test procedures 9.1 Acquiring PD measurements on windings and winding components 9.1.1 General 9.1.2 Test equipment and safety requirements 9.1.3 Preparation of test objects <\/td>\n<\/tr>\n | ||||||
| 116<\/td>\n | 9.1.4 Conditioning 9.1.5 Test voltages <\/td>\n<\/tr>\n | ||||||
| 117<\/td>\n | 9.1.6 PD test procedure Figure 7 \u2013 Test voltage applied to the test object during PD measurement <\/td>\n<\/tr>\n | ||||||
| 119<\/td>\n | 9.2 Identifying and locating the source of partial discharges 10 Interpretation of test results 10.1 General <\/td>\n<\/tr>\n | ||||||
| 120<\/td>\n | 10.2 Interpretation of PD magnitude, inception and extinction voltage 10.2.1 Basic interpretation <\/td>\n<\/tr>\n | ||||||
| 121<\/td>\n | 10.2.2 Trend in PD in a machine over time 10.2.3 Comparisons between winding components or between windings <\/td>\n<\/tr>\n | ||||||
| 122<\/td>\n | 10.3 PD pattern recognition 10.3.1 General 10.3.2 Basic interpretation <\/td>\n<\/tr>\n | ||||||
| 123<\/td>\n | Figure 8 \u2013 Example for identification and localization of PD sources <\/td>\n<\/tr>\n | ||||||
| 124<\/td>\n | 11 Test report <\/td>\n<\/tr>\n | ||||||
| 126<\/td>\n | Annex A (informative)Influence parameters of test frequency to testing procedure Table A.1 \u2013 Recommended minimum measurement timeand maximum slew rates <\/td>\n<\/tr>\n | ||||||
| 127<\/td>\n | Annex B (informative)Alternative methods to determine discharge magnitudes B.1 Qm, according to definition 3.14 Figure B.1 \u2013 Example for the indication of polarity effect <\/td>\n<\/tr>\n | ||||||
| 128<\/td>\n | B.2 Cumulative repetitive PD magnitude Qr <\/td>\n<\/tr>\n | ||||||
| 129<\/td>\n | Figure B.2 \u2013 Effect of A\/D conversion accuracy and the calculation of Qr, Example <\/td>\n<\/tr>\n | ||||||
| 130<\/td>\n | Annex C (informative)Other off-line methods for PD detectionand methods for localization <\/td>\n<\/tr>\n | ||||||
| 131<\/td>\n | Annex D (informative)External noise, disturbance and sensitivity D.1 General D.2 Sensitivity <\/td>\n<\/tr>\n | ||||||
| 132<\/td>\n | Figure D.1 \u2013 Recharging of the test objectby various current components <\/td>\n<\/tr>\n | ||||||
| 133<\/td>\n | D.3 Noise and signal-to-noise ratio D.4 Disturbances <\/td>\n<\/tr>\n | ||||||
| 134<\/td>\n | Annex E (informative)Methods of disturbance suppression E.1 Frequency range limiting E.2 Phase window masking E.3 Masking by noise signal triggering E.4 Noise signal detection by measuring the propagation time Figure E.1 \u2013 Without window masking Figure E.2 \u2013 With window masking <\/td>\n<\/tr>\n | ||||||
| 135<\/td>\n | E.5 Two-channel signal difference method Figure E.3 \u2013 Pulse currents through the measuring circuit <\/td>\n<\/tr>\n | ||||||
| 136<\/td>\n | E.6 Suppression of constant wave (CW) signals by digital filtering E.7 Noise and disturbance rejection using signal processing techniques <\/td>\n<\/tr>\n | ||||||
| 137<\/td>\n | Figure E.4 \u2013 Example of noise rejection <\/td>\n<\/tr>\n | ||||||
| 138<\/td>\n | Figure E.5 \u2013 Example of cross-talk rejection <\/td>\n<\/tr>\n | ||||||
| 139<\/td>\n | Annex F (informative)Interpretation of PD magnitude dataand phase resolved PD patterns F.1 Instructions for interpretation of PRPD patterns F.1.1 Example of PRPD patterns <\/td>\n<\/tr>\n | ||||||
| 140<\/td>\n | Figure F.1 \u2013 Example of PRPD patterns <\/td>\n<\/tr>\n | ||||||
| 141<\/td>\n | F.1.2 Relative severity of different PD mechanisms Table F.1 \u2013 Severity associated with the main PD sources in rotating machines <\/td>\n<\/tr>\n | ||||||
| 142<\/td>\n | F.1.3 Interpretation of the PD measurements from the line side and from the star point F.1.4 Inductive discharges \/ Vibration sparking <\/td>\n<\/tr>\n | ||||||
| 144<\/td>\n | Annex G (informative)Test circuits for complete windings G.1 General G.2 Schemes and illustrations (see Figure G.1) <\/td>\n<\/tr>\n | ||||||
| 148<\/td>\n | Figure G.1 \u2013 Illustrated diagrams for \u04ae- and \u0394-connections, according to 7.3 <\/td>\n<\/tr>\n | ||||||
| 149<\/td>\n | Annex H (informative)Wide-band and narrow-band measuring systems H.1 General Figure H.1 \u2013 Typical pulse responses of wide bandand narrow band PD systems <\/td>\n<\/tr>\n | ||||||
| 150<\/td>\n | H.2 Wide band systems H.3 Narrow band systems <\/td>\n<\/tr>\n | ||||||
| 151<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Rotating electrical machines – Off-line partial discharge measurements on the winding insulation<\/b><\/p>\n |