Ensure that the equipment in the high-voltage and low-voltage electrical control cabinet of high-voltage and low-voltage electrical complete equipment is well grounded, and use short and thick grounding wires to connect to the public grounding point or grounding bus. One of the control equipment connected to the frequency converter shall be grounded, and the grounding shall also use short and thick conductor.
2. In fact, the low-voltage units, relays and touch devices in the high and low-voltage electrical control cabinet are maintained by fuses. Then, when the connection between the frequency converter and the motor exceeds 100m, the power capacity of the frequency converter is also greater than 600kW / A, and the power capacity is also greater than ten times that of the frequency converter, it is recommended to add the input and output reactors.
3. Ensure that the touch device in the high and low voltage electrical control cabinet has arc extinguishing function. The communication touch device adopts R-C suppressor, and the DC touch device adopts "flywheel" diode installed in the winding. The use of varistor suppressors is also very effective.
4. If the working environment of the equipment is in noise, electromagnetic compatibility filtering can be used to reduce the disturbance of radiation. If you want to achieve this better effect, you need to confirm whether the touch between the filter and the device board is normal.
5. Motor cables shall be routed separately from other control cables at an interval of 500 mm. Long interval parallel wiring of motor cables and control cables shall be prevented together. If the control cable and power cable are interspersed, they shall be interspersed at a 90 angle as far as possible.