ELECTROMAGNETIC COMPATIBILITY (EMC) - ENVIRONMENT - ASSESSMENT OF THE EMISSION LEVELS IN THE POWER SUPPLY OF INDUSTRIAL PLANTS AS REGARDS LOW-FREQUENCY CONDUCTED DISTURBANCES
International Electrotechnical Committee
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 General
4 Co-ordination of the emission limits with the
compatibility levels
5 Definitions
6 Survey of conducted emission of industrial equipment
7 Harmonics
8 Interharmonics
9 Three-phase unbalance
10 Voltage changes, flicker and voltage dips
ANNEXES
A Harmonic emission
B Network impedances for calculation of harmonic
propagation and evaluation of harmonic voltage
components
C Interharmonic line current of indirect converters
D Three phase unbalance
E Bibliographic references
Advises procedure for assessing disturbance levels produced by emission of devices, equipment and systems installed in non-public networks in industrial environments, concerned with low-frequency conducted disturbances in the power supply: from which basis the relevant emission limits can be derived. Refers to low and medium voltage a.c. non-public supply at 50/60 Hz. Not applicable to networks for ships, aircraft, off-shore platforms and railways. Applies to the following low-frequency conducted disturbances emitted by equipment connected to power supply: harmonics and interharmonics, unbalances, voltage changes and voltage dips.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 77A |
