1, must choose the correct frequency converter.
2. Read the product instruction manual carefully, and wire, install and use it according to the requirements of the instruction manual.
3, inverter device should be reliable grounding, in order to suppress radio frequency interference, to prevent the inverter from electric shock caused by leakage.
4, pay attention to ventilation and cooling or reduce the load appropriately, so as to avoid the temperature rise of the motor exceeding the allowable value.
5. The impedance of the power supply line should not be too small.
6. When the three-phase voltage imbalance of the power grid is greater than 3%, the peak value of the input current of the frequency converter is very large, which will cause the frequency converter and connecting wires to overheat or damage electronic components. At this time, it is also necessary to install an AC reactor.
7, can’t because of improving the power factor and install too large capacitor in the incoming line side, also can’t install capacitor between motor and inverter, otherwise it will make the line impedance drop, produce overcurrent and damage the inverter.
8. The compensation capacitor cannot be connected in parallel at the outlet side of the inverter, nor can it be connected in parallel to reduce the higher harmonics of the output voltage of the inverter, otherwise the inverter may be damaged.
9. The start and stop of speed regulation with frequency converter cannot be directly operated by circuit breakers and contactors, but by the control terminal of frequency converter, otherwise the frequency converter will be out of control.