|Description / Abstract
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|This part of IEC 61000 is concerned with the limitation of
voltage fluctuations and flicker impressed on the public
It specifies limits of voltage changes which may be produced by
an equipment tested under specified conditions and gives guidance
on methods of assessment.
This part of IEC 61000 is applicable to electrical and
electronic equipment having an input current equal to or less than
16 A per phase, intended to be connected to public low-voltage
distribution systems of between 220 V and 250 V line to neutral at
50 Hz, and not subject to conditional connection.
Equipment which does not comply with the limits of this part of
IEC 61000 when tested with the reference impedance
Zref of 6.4, and which therefore cannot be
declared compliant with this part, may be retested or evaluated to
show conformity with IEC 61000-3-11. Part 3-11 is applicable to
equipment with rated input current ≤ 75 A per phase and subject to
The tests according to this part are type tests. Particular test
conditions are given in Annex A and the test circuit is shown in
NOTE 1 The limits in this standard relate to the voltage changes
experienced by consumers connected at the interface between the
public supply low-voltage network and the equipment user's
installation. Consequently, if the actual impedance of the supply
at the supply terminals of equipment connected within the equipment
user's installation exceeds the test impedance, it is possible that
supply disturbance exceeding the limits could occur.
NOTE 2 The limits in this standard are based mainly on the
subjective severity of flicker imposed on the light from 230 V 60 W
coiled-coil filament lamps by fluctuations of the supply voltage.
For systems with nominal voltage less than 220 V line to neutral
and/or frequency of 60 Hz, the limits and reference circuit values
are under consideration.
|Additional Supplemental Documents