ABB ACH580-31 - Page 199

Harmonics are below the limits defined in IEEE 519-2014, and G5/4.
The drive complies with IEC 61000-3-2, IEC 61000-3-4 and IEC 61000-
3-12.
Harmonic distortion
The table below shows typical values of the drive for short-circuit
ratio ( I
sc
/ I
1
) of 20 to 100. The values will be met if the supply network
voltage is not distorted by other loads and when the drive operates
at nominal load.
THDv (%)THDi (%)Nominal bus voltage V at PCC
< 3**3*V ≤ 690 V
Point on a public power supply system, electrically nearest
to a particular load, at which other loads are, or could be,
connected. The PCC is a point located upstream of the con-
sidered installation.
PCC
Indicates the total harmonic current distortion of the wave
form. This value is defined as the ratio (in %) of the harmonic
current to the fundamental (non-harmonic) current measured
at a load point at the particular moment when the measure-
ment is taken:
THDi =
40
2
n
2
∑ I
I
1
•100%
THDi
Indicates the total magnitude of the voltage distortion. This
value is defined as the ratio (in %) of the harmonic voltage
to the fundamental (non-harmonic) voltage:
THDv =
40
2
n
2
∑U
U
1
•100%
THDv
Short-circuit ratio I
sc
/ I
1
Maximum short-circuit current at PCC I
sc
Continuous rms input current of the drive I
1
Amplitude of the current harmonic n I
n
Supply voltage U
1
Amplitude of the voltage harmonic n U
n
* The short-circuit ratio can influence the THDi value
** Other loads can influence the THDv value
Technical data 199