IEC 61000-3-12-2011 pdf free download – 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
|This part of IEC 61 000 deals with the limitation of harmonic currents injected into the public supply system. The limits given in this International Standard are applicable to electrical and electronic equipment with a rated input current exceeding 1 6 A and up to and including 75 A per phase, 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 690 V, three-phase, three or four wires;
• nominal frequency 50 Hz or 60 Hz.
Other distribution systems are excluded. The limits given in this edition apply to equipmentwhen connected to 230/4o0 V, 50 Hz systems. See also Clause 5.
NOTE1 The limits for the other systems will be added in a future edition of this standard.
NOTE 2 Equipment with a rated input current exceeding 75 A per phase should be considered in the harmoniccurrent requirements for installations.See lECITR 61000-3-6 and future IEC/TR 61000-3-14.
This standard applies to equipment intended to be connected to low-voltage systemsinterfacing with the public supply at the low-voltage level. It does not apply to equipmentintended to be connected only to private low-voltage systems interfacing with the public supplyonly at the medium- or high-voltage level.
NOTE 3 The scope of this standard is limited to equipment connected to public low voltage systems becauseemissions from equipment installed in private low voltage systems can be controlled in aggregate at the M point ofcommon coupling using procedures defined in lEc/TR 61000-3-6 and/or by means of contractual agreementsbetween the distribution network operator and the customer. lt is expected that operators of private systems wilmanage the EMC environment in a manner that ensures compliance with the provisions given in lEC/TR 61000-3-6andlor the contractual agreements.
NOTE 4 lf the equipment is intended to be connected only to private systems, the manufacturer should make thisvery clear in the product documentation.
NOTE5 Professional equipment with input current s16 A per phase and that does not comply with therequirements and limits of standard lEC 61000-3-2 may be permitted to be connected to certain types of low voltagesupplies, in the same way as equipment with input current >16 A per phase and that does not comply with therequirements and limits of the present standard (see Annex C).
NOTE 6 The limits in this standard are not applicable to stand-alone harmonic filters.This standard defines:
a) requirements and emission limits for equipment;b) methods for type tests and simulations.
Tests according to this International Standard are type tests of complete pieces of equipment.
Conformity with this standard can also be determined by validated simulations.
2Normative references
The following referenced documents are indispensable for the application of this document.Fordated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments) applies.
IEC 60038,IEC standard voltages
IEC 60050(161):1990，International Electrotechnical Vocabulary – Chapter 161: Electro-magnetic compatibility
Amendment 1 (1997)Amendment 2 (1998)
IEC 61000-2-2， Electromagnetic compatibility(EMC) – Part 2-2: Environment – Compatibilitylevels for low-frequency conducted disturbances and signalling in public low-voltage powersupply systems
IEC 61000-2-4，Electromagnetic compatibility (EMC) – Part 2-4:Environment – Compatibilitylevels in industrial plants for low-frequency conducted disturbances
IEC 61000-3-2，Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmoniccurrent emissions (equipment input current s16 A per phase)
IEC 61000-4-7，Electromagnetic compatibility (EMC) – Part 4-7: Testing and measurementtechniques – General guide on harmonics and interharmonics measurements andinstrumentation, for power supply systems and equipment connected thereto.IEC 61000-3-12 pdf download.