Electromagnetic compatibility--Limits--Limitation of emission of harmonic currents in low-voltage power supply systems for equipment with rated current greater than 16A
1 Scope
This standard deals with the emission of disturbances due to harmonics.
This standard is applicable to electrical and electronic equipment with a rated input current exceeding 16 A per phase and intended to be connected to public low-voltage a.c. distribution systems of the following types:
—nominal voltage up to 240 V, single-phase, two or three wires;
—nominal voltage up to 600 V, three-phase, three or four wires;
—nominal frequency 50 Hz or 60 Hz.
Other distribution systems are excluded.
Tests according to this report are type tests of complete pieces of equipment, for example a speed variable fan, and not of components, for example a converter.
Connection of this equipment to the supply generally requires special agreement between the supply authority and the consumer. This consent will depend upon several factors including the expected levels of disturbance caused by the equipment and the actual situation at the connection point to the power supply system.
These recommendations specify the information required to enable a supply authority to assess equipment regarding harmonic disturbance and to decide whether or not the equipment is acceptable for connection with regard to the harmonic distortion aspect.
Note 1: for these types of equipment only general recommendations on assessment of disturbances can be given. There is no guarantee that the connection of equipment complying with these recommendations will be
allowed in all cases, as the consent to connect equipment to the supply depends on the level of disturbance caused
by the equipment and the load conditions in the network.
Note 2: these recommendations can also be applied to equipment with a lower rated input current but requiring special consent of the supply authority.
Note3: these recommendations are not applicable to active filters.
Guidance is given on:
a) required short-circuit power for harmonics emitting equipment tested or simulated under specified conditions;
b) methods for type tests or simulations.
2 Normative References
The following normative references contain provisions which, through reference of this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding amended content) to, or revisions of, any of these publications do not apply in this standard. However, parties to agreement based on this standard are encouraged to investigate the possibility of applying the latest edition of these references. For undated references, the latest edition shall be applicable to this standard.
GB/T 4365 Electrotechnical Terminology—Electromagnetic Compatibility(GB/T 4365-2003, idt IEC 60050(161):1990)
GB 17625.1 Electromagnetic Compatibility—Limits—Limits for Harmonic Current Emissions (Equipment Input Current≤16A Per Phase)(GB 17625.1-2003, IEC 61000-3-2: 2001, IDT)
GB/T 17625.3 Electromagnetic Compatibility—Limits—Limitation of Voltage Fluctuations and Flicker in Low-Voltage Power Supply Systems for Equipment with Rated Current Greater than 16A(GB/T 17625.3-2000, idt IEC 61000-3-5: 1994)
GB/T 17626.7 Electromagnetic Compatibility—Testing and Measurement Techniques—General Guide on Harmonics and Interharmonics Measurements and Instrumentation, For Power Supply Systems and Equipment Connected thereto (GB/T 17626.7-1998, idt IEC 61000-4-7; 1991)
GB/T 18039.3 Electromagnetic Compatibility—Environment—Compatibility Levels for Low-Frequency Conducted Disturbances and Signalling in Public Low—Voltage Power Supply Systems(GB/T 18039.3-2003, IEC 61000-2-2:1990, IDT)
Contents
Foreword I
IEC Introduce II
1 Scope
2 Normative References
3 Definitions
4 General Requirements
4.1 Control Methods
4.2 Harmonic Current Measurement
4.3 Equipment Consisting of Several Self-Contained Items
5 Connection Procedures for Equipment
5.1 Stage 1: Simplified Connection
5.2 Stage 2: Connection Based on Network and Equipment Data
5.3 Stage 3: Connection Based on the Consumer's Agreed Power
6 Product Documentation
6.1 General
6.2 Stage
6.3 Stage
6.4 Stage
7 Methods for Type Tests
7.1 Requirements for Measurement Circuit
7.2 Requirements for Simulation
7.3 Test and Simulation Conditions
