Omron SYSDRIVE 3G3EV SERIES, User Manual

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5-12
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Install an input noise filter.
Install an input noise filter (3G3IV-PHF) on the power input side of the Inverter.
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Install an output noise filter.
Install an output noise filter (3G3IV-PLF) on the output side of the Inverter.
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Use metal box and piping.
Metal can block off radio waves. Therefore, enclose the Inverter with a metal
(steel) box to prevent radio waves from being emitted from the Inverter.
5-2-9 Ground Fault Interrupter is Actuated when
Inverter is Started
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Leakage current flows through the Inverter.
Because switching is performed inside the Inverter, a leakage current flows through
the Inverter. This leakage current may actuate the ground fault interrupter, shutting the
power off.
Use a ground fault interrupter with a high leakage-current detection value (sensitivity
amperage of 200 mA or more, operating time of 0.1 second or more) or the one with
high-frequency countermeasures (for Inverter).
Reducing the carrier frequency value is also relatively effective.
Note also that a leakage current increases in proportion to the cable length. Normally,
an approximately 5 mA leakage current is generated per meter (cable length).
5-2-10 Mechanical System Makes Noise
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The carrier frequency and the natural frequency of the mechanical system resonates.
Take the following actions:
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Adjust the carrier frequency.
Adjusting the carrier frequency (n37) may prevent resonance from occurring.
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Install vibration-proof rubber.
Install vibration-proof rubber on the motor base.
5-2-11 Motor Does Not Operate with EF Warning
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EF Warning (simultaneous input of forward and reverse commands) is a warning
alarm that is issued when forward and reverse commands are simultaneously input for
longer than 500 ms. Check the Inverter’s sequence input.
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The Inverter input may be set to the ON state due to the current leaked in from the con-
trol output.
Operation
Chapter 5