When the motor is fully loaded, the current exceeds the rated current, indicating that the motor has been overloaded. This is because the selected power of the motor is too small. If the overload current is within 1.2 times of the rated current and the duration is not more than 20 minutes, it is allowed. If the overload multiple is large or the overload time is long, it will threaten the safety of the motor.

Measures shall be taken to reduce the motor load. If the load cannot be reduced, consider replacing the motor with higher power. If the motor cannot be replaced for the time being, it shall be operated under overload for a period of time. Pay close attention to the motor temperature. The temperature in the motor lifting eye hole can be measured, which shall be more than 30 degrees lower than the allowable temperature of the motor insulation grade. For example, most ordinary motors are class B insulation, and the allowable temperature is 130 degrees, then the temperature measured in the eyelet hole should be less than 100 degrees.

Otherwise, the exhaust fan shall be added to force the motor to dissipate heat, and the high-power motor shall be replaced when there is a chance.

Rated current = rated power / (rated voltage x1.73x power factor) is the current during normal operation of the motor.

Full load operation is a critical overload mode of operation. The motor consumes electric energy to do work. The more work output, the more electric energy (kW. H) consumed. The voltage remains unchanged, so the current becomes larger.

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