Motor Overload

Was bedeutet F7 ?

An excessive motor load exists, causing the drive output current to surpass the motor overload current limit defined by parameter P033 [Motor OL Current]. This protects the motor from thermal damage. This is an Auto-Reset/Run type fault configurable with parameters A092 and A093.

• Mechanical overload on the driven equipment (e.g., seized bearings, material jam) increasing current draw.
• Motor current limit P033 [Motor OL Current] set below the motor's actual full load current (FLA).
• Incorrect motor nameplate data (e.g., P030 [Motor FLA]) entered into the drive, leading to an inaccurate thermal model.
• Motor cooling fan failure or obstructed cooling fins, reducing the motor's ability to dissipate heat.
• Significant phase imbalance in the motor supply voltage causing one or more phases to draw excessive current.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Measure the actual motor current on each phase (U, V, W) using a clamp meter during operation and compare to motor nameplate FLA.

2. 2

   Verify drive parameter P033 [Motor OL Current] is set correctly to 100% of the motor nameplate FLA.

3. 3

   Confirm drive parameter P030 [Motor FLA] matches the motor nameplate FLA and P031 [Motor NP Volts] matches the motor nameplate voltage.

4. 4

   Inspect the driven equipment for mechanical binding or obstruction by rotating the shaft manually if safe to do so.

5. 5

   Check for proper motor cooling by verifying fan operation and ensuring cooling fins are free of dust and debris.