This part of IEC 61000 is concerned with the limitation of
voltage fluctuations and flicker impressed on the public
low-voltage system.
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 conditional connection.
The tests according to this part are type tests. Particular test
conditions are given in annex A and the test circuit is shown in
Figure 1.
NOTE The limits in this part of IEC 61000 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.