Simphoenix V800 Series - 12.8 COMMON EMC INTERFERENCE PROBLEM AND SOLUTION

EMC 231
V800 Series High Performance Closed-Loop Vector Inverter User Manual
◆ Carrier frequency
◆ Type and length of motor cable
◆ EMI filter
6) When leakage current of inverter cause leakage circuit breaker work:
◆ Improve sensitivity of the current value of leakage circuit breaker
◆ Replace a new leakage circuit breaker with high frequency inhibition function
◆ Reduce carrier frequency
◆ Shorten length of output cable
◆ Install a leakage suppression equipment
12.8 COMMON EMC INTERFERENCE PROBLEM AND SOLUTION
Frequency inverter is strong anti-interference equipment, when there is problem in
wiring and ground connection, still maybe will comes out interference. When it happens,
we have below solutions:
Interference Type
Solution
Leakage protection
switch trip
◆ Motor case connect the PE of frequency inverter；
◆ Frequency inverter PE connect the power system PE；
◆ Add Safety capacitance box on input power wire；
◆ Add magnetic loops on input power wire；
Running Drive leads
Interference
◆Motor case connect the PE of frequency inverter；；
◆Frequency inverter PE connect the power system PE；
◆Add Safety capacitance box and magnetic loops on input power
wire；
◆ Add Capacitor or magnetic loops on the interferenced port ；
◆ Share the ground wire between the equipments；
Communication
Interference
◆Motor case connect the PE of frequency inverter；；
◆Frequency inverter PE connect the power system PE；
◆Add Safety capacitance box and magnetic loops on input power
wire；
◆Add matched resistor On communication wire and load end；
◆ Add communication common GND on communication wire；
◆communication wire use shielded wire, shields connect public
Communication；
I/O Interference
◆ Add capacitor filter on low-speed DI, maximum 0.1uF；
◆Add capacitor filter on AI, maximum 0.22uF；
◆Analog signal use shielded wire, shields connect PE of frequency
inverter.
Remark：If you have any other EMC interference questions, please contact the
manufacturer.