INVT Goodrive300-01A Series, Руководство по эксплуатации

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Goodrive300-01A series VFD for air compressor Common EMC problems and troubleshooting
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in which the first two steps is to measure the resistance of motor stator/rotor while the VFD will output
square wave to motor stator winding at 4kHz (default carrier frequency), as leakage current
generated by 4kHz carrier frequency against distributed capacitance between motor rotor and stator
during charging/discharging is quite obvious, which may cause mal-operation of RCD. If such
problem occurred, bypass RCD first and restore after parameter autotuning is completed.
E.5 Problem of charged device shell
The problem mainly lies in that the device shell carries detectable voltage which gives anyone who
touches it a feeling of electrical shock, however, when the VFD is powered up without running, the
shell will be uncharged (or the voltage it carries is far lower than human body safety voltage).
Solution:
a)
If there is distribution grounding or ground pile on users’ site, ground the shell of VFD cabinet by
power GND or ground pile;
b) If there is no grounding connection on site, it is necessary to electrically connect the motor shell
to
grounding terminal PE of the VFD and confirm that the jumper in “EMC/J10” of the VFD is short
connected (refer to section 3.1.3 and 3.1.4 for the position of EMC/J10).