How to reduce electromagnetic interference? | Shihlin Electric

1. The power cables and control cables cannot be parallel wiring, or the distance between them must be at least 10cm. 2. The main signal cables such as communication cables should be shielded cables, the two end of shielding layer should be grounded. A signal magnetic ring could also be installed to reduce the interference. 3. Reduce the carrier frequency of the inverter (P.72) 4. Installation of input filter 5. To ensure well grounding, motor power cable should apply shielded cable (or through iron pipe), shielding layer connected to the inverter ground terminal and then connected to the factory ground terminal. 6. Install a magnetic ring at the inverter power output end. 7. The DC power ground or case of weak electrical equipment, such as sensors, cannot be connected with the cabinet and grounded. Connect the shielding layer of sensor signal cable to power ground (negative pole), install a signal magnetic ring if necessary. 8. Communication cable should apply shielded cable. Connect the shielding layer to the communication ground of the upper controller or inverter, install a signal magnetic ring if necessary. Find quick answers in the Shihlin Electric FAQ—selection, wiring and troubleshooting for circuit breakers, magnetic contactors, AC drives, servo, HMI and PLC control.