YASKAWA A1000 Technical Manual page 433


Input-Side Noise Filter
Drive outputs generate noise as a result of high-speed switching. This noise flows from inside the drive back to the power
supply, possibly affecting other equipment. Installing a noise filter to the input side of the drive can reduce the amount of
noise flowing back into the power supply. This also prevents noise from entering the drive from the power supply.
• Use a noise filter specifically designed for AC drives.
• Install the noise filter as close as possible to the drive.
Figure 8.25
This drive is tested according to European standards IEC/EN 61800-5-1 and complies with the EMC guidelines. Refer to
EMC Guidelines Compliance on page 580

Output-Side Noise Filter
A noise filter on the output side of the drive reduces inductive noise and radiated noise.
example of output-side noise filter wiring.
NOTICE: Do not connect phase-advancing capacitors or LC/RC noise filters to the output circuits. Improper application of noise filters
could result in damage to the drive.
Figure 8.26
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
MCCB
A
MCCB
A – Power supply
B – Input-side noise filter
Figure 8.27 Input-Side Noise Filter (Three-Phase 200/400 V)
for details about EMC filter selection and installation.
A
MCCB
R/L1
S/L2
T/L3
A – Power supply
B – Drive
Figure 8.28 Output-Side Noise Filter
8.5 Installing Peripheral Devices
B C
R/L1
R U
S/L2
S V
T/L3
T W
E
D
C – Drive
D – Other control device
B C
D
U/T1
1 4
V/T2
2 5
M
W/T3
3 6
C – Output-side noise filter
D – Motor
Figure 8.28 illustrates an
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