1 Scope
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 annexes 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 standard and may be subject to installation restrictions as indicated in GB/Z 17625.6(IEC 61000-3-4).
The tests according to this standard are type tests. Test conditions for particular equipment are given in annex 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 standard. They have the same meaning for the purpose of this part.
2 Normative References
The documents referenced in this part of GB 17625 are indispensable for the application of this part. For dated references, only the dated edition is applicable to this part. For undated references, the latest edition (including all amendments) is applicable to this part.
GB/T 2900.1 “Electrotechnical terminology—Fundamental terms” (GB/T 2900.1-1992, idt IEC 60050 (131), 1978)
GB/T 4365 “Electrotechnical terminology--Electromagnetic compatibility” (GB/T 4365-2003, idt IEC 60050 (161), 1990)
GB 4706.7 “Safety of household and similar electrical appliances-Particular requirements for vacuum cleaner and water suction” (GB/T 4706.7-1999, idt IEC 60335-2-2, 1993)
GB 4706.24 “Household and similar electrical appliances - Safety - Particular requirements for washing machines” (GB/T 4706.24-2000, idt IEC 60335-2-7, 1993)
GB 4706.30 “Household and similar electrical appliances-safety - Particular requirements for kitchen machines” (GB/T 4706.30-1992, idt IEC 60335-2-14, 1984)
GB 8898 “Audio,video and similar electronic apparatus--Safety requirements” (GB 8898-2001, eqv IEC 60065: 1998)
GB 15579 “Arc welding equipment—Part 1:Welding power source” (GB 15579-1995, idt IEC 60974-1: 1989)
GB/T 17309.1 “Methods of measurement on receivers for television broadcast transmissions Part 1:General considerations Electrical measurements at radio and video frequencies and measurements on displays” (GB/T 17309.1-1998, idt IEC 60107-1: 1995)
GB/Z 17625.6 “Electromagnetic compatibility--Limits--Limitation of emission of harmonic currents in low-voltage power supply systems for equipment with rated current greater than 16A” (GB/Z 17625.6-2003, idt IEC 61000-3-4: 1998)
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: 1998)
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, idt IEC 61000-2-2: 1990)
IEC 60155 “Glow-starters for fluorescent lamps”
IEC 60268-3 “Sound system equipment - Part 3: Amplifiers”
3 Definitions
For the purpose of this part , the following definitions apply, as well as the definitions of GB/T 4365.
3.1 portable tool
An electrical tool which is hand-held during normal operation and used for a short time.
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.
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 semi-luminaire
A unit similar to a self-ballasted lamp but designed to utilize a replaceable light source and/or starting device.
3.6 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 lamp(s).
3.7 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.
GB 17625.1-2003 The following standards are cited：
