Chapter 6 – Harmonics
6-1
Chapter 6 – Harmonics “EN/IEC 61000-3-2 “ and
“EN/IEC 61000-3-12”
Frequency converters, which are connected to the public low voltage power supply must comply
with limits for harmonics currents. For equipment with input current ≤ 16A per phase, the limits
according to EN/IEC 61000-3-2 are applid, and for equipment with input current >16A and ≤ 75A,
the limits according to EN / IEC 61000-3-12 are applied. For professinal equipment with a rated
power > 1kW, no limits are defined in EN/IEC 61000-3-2.
This equipment complies with EN/IEC61000-3-12 provided that the short-circuit power Ssc is
greator than or equal to the value provided in the table below at the interface point between the
user’s supply and the public system. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if necessary, that the equipment is
connected only to a supply with a short-circuit power Ssc greater than or equal to the value
mentioned in the table below.
3% AC choke
or
4% DC choke
If these devices are connected without a AC/DC reactor to the public low voltage power supply, it
must be obtained connection aproval from the distribution network operator.
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