This part of IEC 61000 is a basic EMC (electromagnetic compatibility) publication. It considers mmunity tests for electric and/or electronic equipment (apparatus and system) in its electro- agnetic environment. Only conducted phenomena are considered, including immunity tests or equipment connected to public and industrial networks. he object of this standard is to establish a reference for evaluating the immunity of electrical nd electronic equipment when subjected to unbalanced power supply voltage. his standard applies to 50 Hz/60 Hz three-phase powered electrical and/or electronic quipment with rated line current up to 16 A per phase. his standard does not apply to equipment with three-phase plus neutral connection if that quipment operates as a group of single-phase loads connected between phase and neutral. his standard does not apply to electrical and/or electronic equipment connected to a.c. 400 Hz istribution networks. his standard does not include tests for the zero-sequence unbalance factor. he immunity test levels required for a specific electromagnetic environment together with erformance criteria are indicated in the product, product family or generic standards as pplicable. This immunity test should be included in product, product family or generic tandards when equipment is likely to show reduced performance or function when exposed to supply voltage with voltage unbalance. he verification of the reliability of electrical components (capacitors, motors, etc.) and long- erm effects (greater than a few minutes) is not considered in this standard.
SANS 61000-4-27:2005 history
2009SANS 61000-4-27:2009 Electromagnetic compatibility (EMC) Part 4-27: Testing and measurement techniques - Unbalance, immunity test for equipment with input current not exceeding 16 A per phase
2005SANS 61000-4-27:2005 Electromagnetic compatibility (EMC) Part 4-27: Testing and measurement techniques - Unbalance, immunity test