V1.1 1.2.4 Mechanical resonance point of the load device The inverter may encounter the mechanical resonance point of the load device within a certain range of output frequency, and must be avoided by setting the jump frequency. 1.2.5 Capacitance or varistor for improving power factor Since the output voltage of the inverter is pulse wave type, if the output side is equipped with a capacitor with improved power factor or a varistor for lightning protection, it will cause the inverter to trip or damage the device. Be sure to remove it, and it is recommended not to be on the output side. Add switching devices such as air switches and contactors, as shown in Figure 1-1.
(If the output of the inverter must be zero when the output side switch device is activated) Figure 1-1 Disabling the capacitor at the output of the inverter 1.2.6 Derate at Basic frequency setting When the fundamental frequency setting is lower than the rated frequency, please pay attention to the derating of the motor to avoid overheating of the motor. 1.2.7 Operating at frequencies above 50Hz If it is operated above 50 Hz, in addition to considering the vibration and noise of the motor, it is necessary to ensure the speed range of the motor bearings and mechanical devices.
1.2.8 Electronic thermal protection value of the motor When the adapter motor is selected, the inverter can thermally protect the motor. If the motor does not match the rated capacity of the inverter, be sure to adjust the protection value or take other protective measures to ensure the safe operation of the motor. 1.2.9 Altitude and derating 9