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.
AS/NZS 61000.4.27:2006 Referenced Document
IEC 61000-2-4 Electromagnetic compatibility (EMC) - Part 2-4: Environment; Compatibility levels in industrial plants for low-frequency conducted disturbances; Corrigendum 1*, 2014-07-01 Update
AS/NZS 61000.4.27:2006 history
1970AS/NZS 61000.4.27:2012 Electromagnetic compatibility (EMC) - Testing and measurement technology - Imbalance and immunity testing of equipment with input current not exceeding 16A per phase
2006AS/NZS 61000.4.27:2006 Electromagnetic compatibility (EMC) - Testing and measurement techniques - Unbalance, immunity test