Vicruns 2S-0.4G-B, User Manual

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Chapter 3 Installation
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3.7 Treatment of EMC problem
3.7.1 Effects of harmonic wave
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Higher harmonic wave of power supply will cause damages to inverter. So in
some places with bad power grid quality, we advise to install AC input reactor.
As higher harmonic wave exists at the output side of AC drive, the application
of capacitor to improve power factor and surge suppressor at output side may
lead to electric shock, or even damages to equipment, so capacitor or surge
suppression device cannot be installed at output side.
3.7.2 Electromagnetic interference and treatment
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Electromagnetic interference has two categories: One is peripheral electrom-
agnetic noise’s interference on AC drive, which will give rise to false operatio-
ns of inverter itself. But the effects of such interference usually are small, be-
cause AC drive has been processed internally in design about this interfere-
nce, and it has a strong antiinterference capability. The other one is AC drive-
’s effects on peripheral equipments.
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AC drive and other electrical products should ground well, and the ground
resistance shall not more than 4
Ω.
It will be better if power line of AC drive won’t be placed in parallel with
circuit of control line. If condition permission, please arrange power lines
vertically.
At those occasions with a high anti- interference requirement, shield
cable shall be used between AC drive and power line of motor, and relia-
ble ground connection also is necessary for shielding layer.
COM
CME
Y1
electric relay
Diode
AC Driver
24V
- +
DC-30V
Remove the external shorting
piece of the control terminal
Figure 3-15 Wiring diagram of digital output terminal Y1