4 Electrical wiring and precautions SV800/SV800A User Manual
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Table 4-6 Common EMC interference problems and solutions
Interference Type
Solutions
Leakage protection switch trip
Connect the motor housing to the PE terminal of the inverter.
Connect the PE terminal of the inverter to the PE of the
power grid.
Add safety capacitor box to the power input cable.
Add magnetic rings to the inverter input cable.
Inverter causes interference during
operation
Connect the motor housing to the PE terminal of the inverter.
Connect the PE terminal of the inverter to the PE of the
power grid.
Add safety capacitors box to the power input cables and
wind the cables with magnetic rings.
Add a safety capacitor to the interfered signal port or wind
the signal cable with magnetic rings.
Common ground connection between equipments;
Communication interference
Connect the motor housing to the PE terminal of the inverter.
Connect the PE terminal of the inverter to the PE of the
power grid.
Add safety capacitors box to the power input cables and
wind the cables with magnetic rings.
Add terminal resistor to the communication cable source and
the load end..
Add communication common grounding line in the out side
of communication cable;
Use shielded cable as communication line and connect the
shield of the cable to the common grounding point.
I/O interference
Enlarge capacitive filter at the low-speed DI and the
recommended maximum value is 0.1uF.
Enlarge capacitive filter at the AI and the recommended
maximum value is 0.22uF.