I²xt overload advance warning

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This is an advance warning for an I²xt overload, indicating frequent and excessively long acceleration processes with motor overcurrent, or permanent motor overload where Imotor > Irmotor. It signals an impending trip condition if conditions do not change.

• Repetitive short-duration overloads, such as frequent starts or rapid acceleration with high inertia, pushing the motor's thermal limits.
• Motor parameters (e.g., C0020 Motor current, C0030 Overload factor) are set close to the operational threshold, triggering the warning prematurely.
• Increased mechanical load or friction in the driven system, causing the motor to draw higher current than typical for extended periods.
• Inadequate motor cooling due to dust buildup on fins or high ambient temperature, leading to faster thermal buildup even at nominal current levels.

Klikk på steg for å spore fremgangen.

1. 1

   1. Observe the motor current (e.g., parameter P0005) on the drive display during various load conditions and compare to the motor's rated current.

2. 2

   2. Verify that motor protection parameters (e.g., C0020 Motor rated current) are correctly set according to the motor nameplate data.

3. 3

   3. Increase acceleration and deceleration times (e.g., C0026, C0027) to reduce current peaks and cumulative thermal stress during transient operations.

4. 4

   4. Check the motor and its cooling fan for accumulated dust, debris, or obstructions that might impede airflow, and clean if necessary.

5. 5

   5. Use an infrared temperature gun to measure the motor casing temperature and compare it to its rated operating temperature (if available).