A "current limit" feature in a Variable Frequency Drive (VFD) is designed to protect the motor and the VFD itself from excessive current draw. This feature prevents the motor from drawing more current than it should under normal operating conditions, which can occur due to various reasons such as mechanical overload, voltage fluctuations, or improper settings.

Here's how the current limit feature typically works and some troubleshooting steps:

1. Adjustment: In most VFDs, you can set the current limit either as a percentage of the drive's rated current or as an absolute value in amperes. Ensure that the current limit setting is appropriate for the motor's rating and the application's requirements. You may need to consult the VFD's user manual or contact the manufacturer for guidance on adjusting the current limit setting.

2. Monitoring: The VFD continuously monitors the motor's current draw during operation. If the current exceeds the set limit, the VFD will take action to protect the motor and itself. This action may involve reducing the output frequency to limit the torque or temporarily shutting down the drive to prevent damage.

3. Causes of Excessive Current: Investigate the possible causes of excessive current draw, which can include mechanical overload, voltage fluctuations, improper motor sizing, or incorrect VFD settings. Inspect the motor and driven equipment for any mechanical issues that could be causing excessive loading.

4. Load Characteristics: Consider the load characteristics of the driven equipment. Some loads, such as those with high inertia or sudden changes in torque demand, may require special consideration in setting the current limit to avoid nuisance tripping.

5. Voltage Stability: Ensure that the input voltage supplied to the VFD is stable and within the specified range. Voltage fluctuations can affect the motor's current draw and trigger the current limit feature.