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10.4 External filters to reduce grid harmonics (optional)
ADV200-RHF filters are used to reduce total harmonic distortion (current) on the
power supply line.
The choice of filter depends on the rated characteristics of the motor, on its ser-
vice conditions (LD or HD), and on the performance levels you want to achieve in
terms of line THDi.
The tables in section 10.4.3 show the standard performance for each motor size
as defined by motor tables in efficiency class IE2 – High Efficiency (according to
standard).
Considering that filters are normally required in HVAC applications, the service
use of the motor (and therefore of the inverter) is always Light Duty.
The following section shows the formula and an example of calculation of line
current starting from motor data. Therefore, you can always select an appropriate
filter for HD service as well.
On RHF-A and RHF-B series filters, input choke inductance is integrated in the filters.
On RHF-AS and RHF-BS series filters, inductance is external and is supplied with
these filters
Drive efficiency = 0.975
RHF efficiency = 0.99.
10.4.1 Choice of performance and calculation of current in RHF filters
Models
RHF -X XX -XXX -XX -XX -X
RHF -XS XX -XXX -XX -XXX -X
Choice of performance
choke inductance or DC
160
RHF-A
Inverter without input
Inverter with input choke
< 16%
ADV200 • Schnellanleitung zur Installation - Spezifikationen und Anschluss
Version
Protection degree (IP)
Mains frequency
Grid
Filter rated current
A: THDi ≤ 10% with mains or DC choke (THDu ≤ 2%)
B: THDi ≤ 5% with mains or DC choke (THDu ≤ 2%)
Passive filter to reduce harmonics
Version
Fan voltage supply
Mains frequency
Grid
Filter rated current
AS: THDi ≤ 10% (THDu ≤ 2%) and supply of external input
choke inductance L0
BS: THDi ≤ 5% (THDu ≤ 2%) and supply of external input
choke inductance L0
Passive filter to reduce harmonics
Inverter without input
inductance or DC
choke inductance or DC
< 10%
RHF-B
Inverter with input choke
inductance or DC
< 10%
< 5%
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