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Inverter overload

First, overload trip and cause analysis

The motor can rotate, but the operating current exceeds the rated value, called overload. The basic reflection of the overload is that although the current exceeds the rated value, the magnitude of the excess is not large, and generally no large inrush current is formed.

  Second, the main reason for overload

    The mechanical load is too heavy, and the main feature of the overload is that the motor is hot and can be found by reading the operating current from the display.

    The three-phase voltage is unbalanced, causing the operating current of a certain phase to be too large, resulting in an overload trip. The characteristic is that the motor is not heated evenly. It is not always found when reading the running current from the display screen (since the display only shows one phase current) .

    In case of malfunction, the current detection part inside the inverter fails, and the detected current signal is too large, causing tripping.