AS/NZS 61000.4.27:2012 PDF – Electromagnetic compatibility (EMC) Part 4.27: Testing and measurement techniques—Unbalance, immunity test for equipment with input current not exceeding 16 A per phase

AS/NZS 61000.4.27:2012 PDF – Electromagnetic compatibility (EMC) Part 4.27: Testing and measurement techniques—Unbalance, immunity test for equipment with input current not exceeding 16 A per phase
1 Scope and object
This part of IEC 61 000 is a basic EMC (electromagnetic compatibility) publication. It considers immunity tests for electric and/or electronic equipment (apparatus and system) in its electro- magnetic 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 1 6 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 long- term effects (greater than a few minutes) is not considered in this standard.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61 000. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61 000 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
8.1 .1 Climatic conditions
Unless otherwise specified by the committee responsible for the generic or product standard, the climatic conditions in the laboratory shall be within any limits specified for the operation of the EUT and the test equipment by their respective manufacturers. Tests shall not be performed if the relative humidity is so high as to cause condensation on the EUT or the test equipment. NOTE Where it is considered that there is sufficient evidence to demonstrate that the effects of the phenomenon covered by this standard are influenced by climatic conditions, this should be brought to the attention of the committee responsible for this standard.

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