This part deals with the limitation of harmonic currents injected into the public supply system.
This part specifies limits of harmonic components of the input current which may be produced by equipment tested under specified conditions.
Harmonic components are measured according to Appendixes A and B.
This part is applicable to electrical and electronic equipment having an input current up to and including 16 A per phase, and intended to be connected to public low-voltage distribution systems.
Arc welding equipment which is not professional equipment, with input current up to and including 16 A per phase, is included in this part.
Arc welding equipment intended for professional use, as specified in IEC 60974-1, is excluded from this part and may be subject to installation restrictions as indicated in IEC 61000-3-4 or IEC 61000-3-12.
The tests according to this part are type tests. Test conditions for particular equipment are given in Appendix C.
For systems with nominal voltages less than 220 V (line-to-neutral), the limits have not yet been considered.
Note: The words apparatus, appliance, device and equipment are used throughout this part. They have the same meaning for the purpose of this part.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050(131) International Electrotechnical Vocabulary (IEV) — Clause 131: Electric and magnetic circuits
IEC 60050(161) International Electrotechnical Vocabulary (IEV) — Clause 161: Electromagnetic compatibility
IEC 60107-1 Methods of measurement on receivers for television broadcast transmissions — Part 1: General considerations — Measurements at radio and video frequencies
IEC 60155 Glow-starters for fluorescent lamps
IEC 60268-1:1985 Sound system equipment — Part 1: General
IEC 60268-3 Sound system equipment — Part 3: Amplifiers
IEC 60335-2-2 Household and similar electrical appliances — Safety — Part 2-2: Particular requirements for vacuum cleaners and water-suction cleaning appliances
IEC 60335-2-14 Household and similar electrical appliances — Safety — Part 2-14: Particular requirements for kitchen machines
IEC 60974-1 Arc welding equipment — Part 1: Welding power sources
IEC 61000-2-2 Electromagnetic compatibility (EMC) — Part 2: Environment — Section 2: Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems
IEC/TS 61000-3-4 Electromagnetic compatibility (EMC) — Part 3-4: Limits — Limitation of emission of harmonic currents in low-voltage power supply systems for equipment with rated current greater than 16 A
IEC 61000-3-12 Electromagnetic compatibility (EMC) — Part 3-12: Limits — Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤75 A per phase
IEC 61000-4-7 Electromagnetic compatibility (EMC) — Part 4-7: Testing and measurement techniques — General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto
ITU-R BT.471-1 Nomenclature and description of colour bar signals
3 Definitions
For the purpose of this part, the following definitions apply, as well as the definitions of IEC 60050(161).
3.1
Portable tool
An electrical tool which is hand-held during normal operation and used for a short time (a few minutes) only.
3.2
Lamp
A source for producing light.
3.3
Self-ballasted lamp
A unit which cannot be dismantled without being permanently damaged, provided with a lamp cap and incorporating a light source and any additional element necessary for starting and stable operation of the light source.
3.4
Luminaire
An apparatus (other than a lamp) which distributes, filters or transforms the light transmitted from one or more lamps and which includes all the parts necessary for supporting, fixing and protecting the lamps, and, where necessary, circuit auxiliaries, together with the means for connecting them to the supply.
3.5
Ballast
A device connected between the supply and one or more discharge lamps which serves mainly to limit the current of the lamp(s) to the required value. It may include means for transforming the supply voltage and/or frequency, correcting the power factor and, either alone or in combination with a starting device, provide the necessary conditions for starting the lamps.
3.6
Step-down converter for lighting equipment
A unit inserted between the supply and one or more tungsten halogen or other filament lamps which serves to supply the lamp(s) with its (their) rated voltage, generally at high frequency. The unit may consist of one or more separate components. It may include means for dimming, correcting the power factor and suppressing radio interference
3.7
Reference lamp
A lamp selected for testing ballasts which, when associated with a reference ballast, has electrical characteristics that are close to the objective values given in the relevant lamp specification.
3.8
Reference ballast
A special inductive-type ballast designed for the purpose of providing comparison standards for use in testing ballasts and for the selection of reference lamps. It is essentially characterized by a stable voltage-to-current ratio, which is relatively uninfluenced by variations in current, temperature, and the magnetic surroundings
3.9
Input current
Current directly supplied to an equipment or a part of equipment by the a.c. distribution system.
3.10
Circuit power factor
The circuit power factor is the ratio of the measured active input power to the product of the supply voltage (r.m.s.) and the supply current (r.m.s.).
3.11
Active power
The mean value, taken over one period, of the instantaneous power.
