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Introduction
Operating instructions RHF
17
ELTROPLAN
-
REVCON
Elektrotechnische Anlagen GmbH
IEC 61000-3-4:
Limits, Limitation of emission of harmonic currents in low-voltage power supply
systems for equipment with rated current greater than 16A.
The IEC 61000-3-12 supersedes IEC 61000-3-4 for currents up to 75A. Therefore
the scope of IEC 61000-3-4 is equipment with rated current greater than 75A con-
nected to the public low voltage distribution system. It has the status of a
Tech-
nical report
and should not be seen as an international standard.
A three-stage assessment procedure is described for the connection of equip-
ment to the public supply and equipment above 75A is limited to stage 3
connec-
tion based on the load's agreed power
. The supply authority may accept the con-
nection of the equipment on the basis of the agreed active power of the load's in-
stallation and local requirements of the power supply authority apply. The manu-
facturer shall provide individual harmonics and the values for THD and PWHD.
IEC 61000-2-2 and IEC 61000-2-4:
The IEC 61000-2-2 and IEC 61000-2-4 are
standards that stipulate compatibility levels for low-frequency conducted disturb-
ances in public low-voltage supply systems (IEC 61000-2-2) and industrial plants
(IEC 61000-2-4).
These low-frequency disturbances include harmonics, but are not limited to har-
monics.
The values prescribed in these standards should be taken into consideration
when planning installations. In some situations the harmonic compatibility levels
cannot be observed in installations with frequency converters and harmonic miti-
gation is needed.
IEEE519
,:
IEEE519 establishes goals for the design of electrical systems that include both
linear and nonlinear loads. Waveform distortion goals are established and the in-
terface between sources and loads is described as point of common coupling
(PCC).