Overvoltage

Hva betyr OSF ?

The input line voltage supplied to the soft starter has exceeded the permissible limits. This condition can potentially damage the soft starter's power components and other connected equipment.

• Input line voltage from the mains supply consistently exceeds the soft starter's maximum permissible input voltage (e.g., >528VAC for a 480V unit).
• Regenerative energy from a high inertia load rapidly decelerating without adequate braking (can occur if fast stop is initiated).
• Unstable or poorly regulated grid supply with frequent voltage spikes or surges.
• Incorrect soft starter model selected for the available line voltage (e.g., 400V unit on a 480V system).
• Faulty voltage sensing circuit within the soft starter providing inaccurate readings.

Klikk på steg for å spore fremgangen.

1. 1

   1. Measure the incoming line voltage (L1-L2, L2-L3, L3-L1) at the soft starter's input terminals using a true RMS voltmeter; monitor for spikes over time.

2. 2

   2. Verify that the supply voltage consistently remains within the soft starter's specified operating voltage range (e.g., 380-480VAC).

3. 3

   3. Check power quality upstream of the soft starter for transients using a power quality analyzer if persistent voltage spikes are suspected.

4. 4

   4. Review soft starter parameters for any voltage monitoring thresholds (e.g., P6-01 (Overvoltage Trip Level)) and ensure they are appropriately set for the application.

5. 5

   5. Confirm that the installed soft starter is rated for the nominal input line voltage (e.g., 400V, 480V, 600V).