EM500 Open-Loop Vector Control Inverter User Manual performed after power-off. For synchronous motor, it will generate power when in rotation, please wait for at least 10 minutes after it stops rotating, and then disconnect the motor from the inverter, otherwise there is risk of electric shock. Attentions Motor Insulation Inspection Motor insulation inspection shall be performed before using a motor for the first time or left unused for some time or during routine inspection, in order to avoid damaging inverter due to failure of insulation performance of motor winding. Make sure to disconnect motor cable from inverter during inspection; 500V megohmmeter is recommended.
The obtained insulation resistance from test shall not be lower than 5MΩ. Motor Thermal Protection If the selected motor does not match with inverter in rated capacity, especially when its rated power is lower than that of inverter, be sure to adjust motor protection parameters of inverter or install a thermal relay in front of the motor to protect the motor. Operation at Power frequency Output frequency of inverter ranges from 0.00 Hz to 600.00 Hz. To use inverter at over 50.00 Hz, please consider the bearing capacity of mechanical device.
Motor Heat and Noise Since output voltage of inverter presents a PWM waveform along with some harmonic waves, the temperature rise, noise and vibration of motor would increase a little in comparison with the running under power frequency. Varistor or Power Factor Improvement Capacitor on Inverter Output Inverter outputs PWM wave. Do not use inverter, if a power factor improvement capacitor or a lightning varistor is on output side, which may easily result in transient overcurrent of inverter, or even damage inverter. Beyond Rated Voltage Do not use EM500 inverter outside the operating voltage range specified in this manual, which may easily damage its internal parts.
If you have to do so, install a voltage rise or reduction device for transformation. Surge Protection A surge protection device is installed in inverter to prevent it from induction lightning stroke on a certain degree. Additional protection devices are required in front of inverter in the places where thunder and lightning occur frequently. 6