Inovance MD380 Series, User Manual

Page: 260 / 304

EMC
MD380 User Manual
- 260 -
7.6 Solutions to Common EMC Interference Problems
The AC drive generates very strong interference. Although EMC measures are taken, the
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drive interferes with other devices, adopt the following solutions.
Interference Type Solution
Leakage protection
switch tripping
‡
Connect the motor housing to the PE of the AC drive.
‡
Connect the PE of the AC drive to the PE of the mains power supply.
‡
Add a safety capacitor to the power input cable.
‡
Add magnetic rings to the input drive cable.
AC drive
interference
during running
‡
Connect the motor housing to the PE of the AC drive.
‡
Connect the PE of the AC drive to the PE of the mains voltage.
‡
Add a safety capacitor to the power input cable and wind the cable with
magnetic rings.
‡
Add a safety capacitor to the interfered signal port or wind the signal
cable with magnetic rings.
‡
Connect the equipment to the common ground.
Communication
interference
‡
Connect the motor housing to the PE of the AC drive.
‡
Connect the PE of the AC drive to the PE of the mains voltage.
‡
Add a safety capacitor to the power input cable and wind the cable with
magnetic rings.
‡
Add a matching resistor between the communication cable source and
the load side.
‡
Add a common grounding cable besides the communication cable.
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cable shield to the common grounding point.
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‡
Enlarge the capacitance at the low-speed DI. A maximum of 0.11 uF
capacitance is suggested.
‡
Enlarge the capacitance at the AI. A maximum of 0.22 uF is suggested.
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