1 Scope and object
This part of IEC 61000‑4 relates to the immunity requirements and test methods for electrical and electronic
equipment, under operational conditions, with regard to:
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a) repetitive damped oscillatory waves occurring mainly in power, control and signal
cables installed in high voltage and medium voltage (HV/MV) substations;
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b) repetitive damped oscillatory waves occurring mainly in power, control and signal
cables installed in gas insulated substations (GIS) and in some cases also air insulated substations (AIS) or in any installation due to HEMP phenomena.
The object of this basic standard is to establish the immunity requirements and a
common reference for evaluating in a laboratory the performance of electrical and
electronic equipment intended for residential, commercial and industrial applications,
as well as of equipment intended for power stations and substations, as applicable.
NOTE As described in IEC guide 107, this is a basic EMC publication for use by product
committees of the IEC. As also stated in Guide 107, the IEC product committees are
responsible for determining whether this immunity test standard should be applied
or not, and if applied, they are responsible for determining the appropriate test
levels and performance criteria. TC 77 and its sub-committees are prepared to co-operate
with product committees in the evaluation of the value of particular immunity tests
for their products.
The purpose of this standard is to define:
The object of this standard is to establish a common reference for evaluating the
immunity of electrical and electronic equipment when subjected to damped oscillatory
waves. The test method documented in this part of IEC 61000 describes a consistent method to assess the immunity of an equipment or system against
a defined phenomenon.