Filter Type Selection - WEG CFW-11M RB User Manual

Synchronism
transformer
A
B
C
L2
C
T
R
R
T
S
C
C
S
R
R
R
L1
R
Filter 2
Figure 3.43 - Simplified connection drawing of the filter 2 with two power units

3.4.7.5 Filter Type Selection

The filter 2 should be used whenever it is possible because it prevents high-frequency currents flow on the
main power supply eliminating potential interference with other equipment.
The filter 1 can be used only when some specific conditions are met, as stated in the figure 3.44:
UC11-RB
S
T
Type of
filter
Is the
transformer power rating
bigger than 20 times the motor
power rating?
No
Are there any other
load (equipment) connected to the
same transformer?
Yes
Use filter 2
Figure 3.44 - Filter type selection flowchart
Installation and Connection
DC Link
UC11
U
Yes
No
Filter 1
can be used
CFW-11M RB |3-29
Motor
3
V W