ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 2-4: ENVIRONMENT - COMPATIBILITY LEVELS IN INDUSTRIAL PLANTS FOR LOW-FREQUENCY CONDUCTED DISTURBANCES
International Electrotechnical Committee
FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Definitions <br> 3.1 General definitions<br> 3.2 Phenomena-related definitions<br>4 Electromagnetic environment classes<br>5 Compatibility levels<br> 5.1 General comment <br> 5.2 Voltage deviations<br> 5.3 Voltage dips and short interruptions<br> 5.4 Voltage unbalance (imbalance) <br> 5.5 Temporary power-frequency variation <br> 5.6 Harmonics<br> 5.7 Interharmonics<br> 5.8 Voltage components at higher frequencies (above 50th <br> harmonic)<br> 5.9 Transient overvoltages<br> 5.10 DC component<br>6 Compatibility levels<br>Annex A (informative) Explanations and examples for <br> interharmonics <br> A.1 Resolution of non-sinusoidal voltages and currents<br> A.2 Time varying phenomena<br> A.3 Definition of additional terms <br>Annex B (informative) Examples of expected disturbance levels<br> in typical industrial networks<br> B.1 Voltage disturbance levels in industrial networks due <br> to large converters <br> B.2 Voltage disturbance levels in industrial networks at <br> high load<br> B.3 Voltages dips and short interruption<br> B.4 Transient overvoltages<br>Annex C (informative) Interharmonic and voltages at higher <br> frequencies<br> C.1 Sources of interharmonics<br> C.2 Mitigation methods<br> C.3 Voltages at higher frequencies<br>Bibliography<br>Figures<br>Tables
Provides numerical compatibility levels for industrial and non-public power distribution systems at nominal voltages up to 35 kV and a nominal frequency of 50 Hz or 60 Hz. The compatibility levels specified in this standard apply at the in-plant point of coupling.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 77 |
