The protection of the inverter to the motor mainly includes the following aspects: over voltage protection, under voltage protection, over current protection, phase loss protection, reverse phase protection, overload protection, ground protection, short circuit protection, over frequency protection and stall protection. By setting the inverter parameters, the motor current, voltage, frequency and other values are limited. If the inverter exceeds the limit value, the inverter will stop and the motor will be operated to protect the motor. The fault code on the inverter can be used to find out the protection reason.

1. Overvoltage protection:

The output of the inverter has a voltage detection function, and the inverter can automatically adjust the output voltage so that the motor does not withstand overvoltage. Even when the output voltage adjustment fails and the output voltage exceeds 110% of the normal voltage, the inverter protects the motor by stopping the machine.

2. Undervoltage protection:

When the voltage of the motor is lower than 90% of the normal voltage, the inverter protection stops.

3. Overcurrent protection:

When the current of the motor exceeds 150%/3 seconds of the rated value, or 200%/10 microseconds of the rated current, the inverter protects the motor by stopping.

4. Phase loss protection:

The output voltage is monitored. When the output is out of phase, the inverter will alarm. After a period of time, the inverter will stop the motor to protect the motor.

5. Reverse protection:

The inverter can be set so that the motor can only rotate in one direction. The direction of rotation cannot be set. Unless the user changes the phase sequence of the motor A, B, C wiring, there is no possibility of inversion.

6. Overload protection:

The inverter monitors the motor current. When the motor current exceeds 120%/1 minute of the rated current, the inverter protects the motor by stopping.

7. Grounding protection:

The frequency converter is equipped with a special grounding protection circuit,