Omron SYSDRIVE 3G3MV-A2001, User Manual

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H
Ground Wiring
•
Always use the ground terminal of the 200-V Inverter with a ground resistance of 100
Ω
or less. Simi-
larly, always use the ground terminal of the 400-V Inverter with a ground resistance of 10
Ω
or less.
•
Do not share the ground wire with other devices such as welding machines or power tools.
•
Always use a ground wire that complies with technical standards on electrical equipment and mini-
mize the length of the ground wire.
Leakage current flows through the Inverter. Therefore, if the distance between the ground electrode
and the ground terminal is too long, the potential on the ground terminal of the Inverter will become
unstable.
•
When using more than one Inverter, be careful not to loop the ground wire.
H
Countermeasures against Harmonics
With the continuing development of electronics, the generation of harmonics from indus-
trial machines has been causing problems recently.
Refer to the following information for the definition of harmonics (i.e., harmonic currents
with voltages) and countermeasures against the generation of harmonics from the
Inverter.
D
Harmonics
Definition
Harmonics consist of electric power produced from AC power and alternating at frequencies that are
integral multiples of the frequency of the AC power.
Design Chapter 2