YASKAWA Inverter Spécifications Page 161

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Radiated Noise: Electromagnetic waves radiated from the drive and cables create noise throughout the radio bandwidth
that can affect devices.
Induced Noise: Noise generated by electromagnetic induction can affect the signal line and may cause the controller to
malfunction.
Preventing Induced Noise
Use
a noise filter on the output side or use shielded cables. Lay the cables at least 30 cm away from the signal line to prevent
induced noise.
B
A
C
F
G
D
E
R/L1
MCCB
S/L2
T/L3
U/T1
V/T2
W/T3
A Power supply
B Drive
C Shielded motor cable
D Motor
E Separate at least 30 cm
F Controller
G Signal line
Figure 8.8 Preventing Induced Noise
Reducing Radiated/Radio Frequency Noise
The drive, input lines, and output lines generate radio frequency noise. Use noise filters on input and output sides and install
the drive in a metal enclosure panel to reduce radio frequency noise.
Note: The cable running between the drive and motor should be as short as possible.
C ED
B
F
A
R/L1
MCCB
S/L2
T/L3
U/T1
V/T2
W/T3
G
A Metal enclosure
B Power supply
C Noise filter
D Drive
E Noise filter
F Shielded motor cable
G Motor
Figure 8.9 Reducing Radio Frequency Noise
u
Zero-Phase Reactor
A zero-phase reactor can be used to reduce the noise on the input and output sides of the drive.
8.4 Installing Peripheral Devices
YASKAWA ELECTRIC SIEP C710606 31A YASKAWA AC Drive – J1000 Technical Manual
161
8
Peripheral Devices &
Options
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