RI3000 User Manual V1.1 1.2 Use Considerations 1.2.1 Motor Insulation Inspection When the motor is used for the first time or when the motor is reused after being kept, or when periodical inspection is performed, insulation inspection shall be conducted with motor so as to avoid damaging the inverter because of the insulation failure of the motor windings. The motor wires must be disconnected from the inverter during the insulation inspection. It is recommended to use the 500V mega meter, and the insulating resistance measured shall be 5M Ω at least.
Chapter 1 1.2.2 Motor Thermal Protection If the motor rating does not match that of the inverter, especially when the rated power of the inverter is higher than that of the motor, adjust motor protection parameters in the inverter or install thermal relay to protect motor. 1.2.3 Operating with the Frequency Higher than Grid Power Frequency Output frequency of RI3000 is 0.00Hz ~ 500Hz. If RI3000 is required to operate above 50.00Hz, please take the endurance of mechanical devices into consider - ation.
1.2.4 Mechanical Vibrations Inverter may encounter mechanical resonance point of the load device at certain output frequencies which can be avoided by setting the skip frequency paramet - ers of the inverter. 1.2.5 Motor Heat and Noise Since output voltage of inverter is PWM wave and contains a certain amount of harmonics, so that the temperature, noise and vibration of the motor will be higher than those when the inverter runs at grid power frequency.
1.2.6 Voltage-sensitive device or capacitor on output side of the AC drive Do not install the capacitor for improving power factor or lightning protection voltage-sensitive resistor on the output side of the AC drive because the output of the AC drive is PWM wave. Otherwise, the AC drive may suffer transient overcurrent or even be damaged. 1.2.7 Contactor at the I/O terminal of the AC drive When a contactor is installed between the input side of the AC drive and the pow - er supply, the AC drive must not be started or stopped by switching the contactor on or off.
If the AC drive has to be operated by the contactor, ensure that the time interval between switching is at least one hour since frequent charge and discha - rge will shorten the service life of the capacitor inside the AC drive ; -9-