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IEC 61000-4-27 Document Information:
Title
Electromagnetic compatibility (EMC) – Part 4-27: Testing and measurement techniques – Unbalance, immunity test for equipment with input current not exceeding 16 A per phase
Compatibilité électromagnétique (CEM) – Partie 4-27: Techniques d’essai et de mesure – Essai d’immunité aux déséquilibres pour des matériels avec un courant appelé n’excédant pas 16 A par phase
International Electrotechnical Commission
Publication Date:
Apr 1, 2009
Scope:
This part of IEC 61000 is a basic EMC (electromagnetic compatibility) publication. It considers immunity tests for electric and/or electronic equipment (apparatus and system) in its electromagnetic environment. Only conducted phenomena are considered, including immunity tests for equipment connected to public and industrial networks.
The object of this standard is to establish a reference for evaluating the immunity of electrical and electronic equipment when subjected to unbalanced power supply voltage.
This standard applies to 50 Hz/60 Hz three-phase powered electrical and/or electronic equipment with rated line current up to 16 A per phase.
This standard does not apply to equipment with three-phase plus neutral connection if that equipment operates as a group of single-phase loads connected between phase and neutral.
This standard does not apply to electrical and/or electronic equipment connected to a.c. 400 Hz distribution networks.
This standard does not include tests for the zero-sequence unbalance factor.
The immunity test levels required for a specific electromagnetic environment together with performance criteria are indicated in the product, product family or generic standards as applicable. This immunity test should be included in product, product family or generic standards when equipment is likely to show reduced performance or function when exposed to a supply voltage with voltage unbalance.
The verification of the reliability of electrical components (capacitors, motors, etc.) and longterm effects (greater than a few minutes) is not considered in this standard.
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