Omron SYSDRIVE 3G3EV User Manual page 37

Design
D Installing a Noise Filter on the Output Side
Connect a noise filter to the output side of the Inverter to reduce radio noise and induc-
tion noise.
Power supply
Induction Noise: Electromagnetic induction generates noise on the signal line, causing
the controller to malfunction.
Radio Noise: Electromagnetic waves from the Inverter and cables cause the
broadcasting radio receiver to make noise.
D How to Prevent Induction Noise
As described above, a noise filter can be used to prevent induction noise from being
generated on the output side. Alternatively, cables can be routed through a grounded
metal pipe to prevent induction noise. Keeping the metal pipe at least 30 cm away from
the signal line considerably reduces induction noise.
Power supply
D How to Prevent Radio Noise
Radio noise is generated from the Inverter as well as the input and output lines. To re-
duce radio noise, install noise filters on both input and output sides, and also install the
Inverter in a totally enclosed steel box.
3G3EV
Signal line
Controller
MCCB
3G3EV
Signal line
3G3IV-PLF
Noise
filter
Induction noise Radio noise
AM radio
Metal pipe
30 cm min.
Controller
Chapter 3
3-17