User Manual of EM760 High-Performance Inverter 3.2.5.7 Solution to inductive interference To suppress the inductive interference on the output side, all output cables can be laid in the grounded metal tubes, in addition to the aforesaid installation of the noise filter. When the distance between the output cable and signal line is greater than 30 cm, the impact of inductive interference will decrease significantly, as shown below. Fig.
3-13 Solution to inductive interference 3.2.5.8 Solution to RF interference The input cable, output cable and inverter itselfgenerates RF interference, which can be reduced by installing noise filters on the input and output sides and shielding the inverter body with an iron box, as shown below. Fig. 3-14 Solution to RF interference 3.2.5.9 Wiring distance between inverter and motor The longer the wiring distance between the inverter and motor, the higher the carrier frequency and the higher harmonic leakage current in the cable. This will adversely affect the inverter and nearby devices. Refer to Table 3-2 to adjust the carrier frequency and reduce the high-frequency leakage current.
● When the motor wiring distance exceeds 50 m, connect the output terminals (U, V, W) of the inverter with the dedicated AC reactor (phase capacity: the same as that of the inverter) for inverter output. Table 3-2 Wiring Distance and Carrier Frequency between Inverter and Motor 3.2.6 Cable and screw dimensions of main circuit The cable and screw dimensions of the main circuit are shown below. 50 Wiring distance between inverter and motor >100m Carrier frequency Below 10kHz Below 8kHz Below 5kHz Function code F00.23 10.0 8.0 5.0