Cause : Mains overvoltage comes when input supply is higher then the rated limit. This fault is critical, as prolonged exposure to high voltage can damage the drive's internal components.

F513 Mains overvoltage fault in ABB DCS800 drive indicates mains overvoltage condition. This means that the voltage supplied to the drive from the power grid has exceeded its safe operating limit.

Here’s how to troubleshoot and resolve this fault:

1. Check Incoming Voltage:

• Use a multimeter to measure the incoming mains voltage. Ensure that it is within the acceptable range specified for the DCS800 drive. If the voltage exceeds the rated input voltage, this may cause the F513 fault.
• Verify if there are voltage spikes or transients in the supply that could cause temporary overvoltage conditions. This may require a more advanced monitoring device.

2. Inspect Power Supply and Network Conditions:

• Ensure the power supply to the drive is stable and does not experience frequent fluctuations. Use a power quality analyzer if necessary to assess the stability of the supply.
• Look for any phase imbalances in the supply that could lead to voltage issues. Ensure all three phases are balanced and functioning correctly.

3. Check for External Influences:

• Investigate if there are any nearby equipment or systems that might be injecting voltage spikes into the mains, such as large motors starting or switching operations in close proximity.
• Consider whether the drive is connected to a system that includes inductive loads (like transformers or motors) that may create voltage transients.

4. Verify Drive Configuration and Settings:

• Check the drive’s configuration settings related to voltage thresholds. Make sure that the upper limit for mains voltage is appropriately set for your application. If necessary, adjust the parameters in accordance with the motor’s specifications.
• Some drives allow you to enable overvoltage protection features. Ensure these settings are active and configured correctly.

5. Inspect Input Filter (If Applicable):

• If the drive is equipped with an input filter, check it for faults or damage. A malfunctioning input filter may fail to mitigate overvoltage conditions.
• Ensure that all capacitors in the input filter are functioning properly and not showing signs of bulging or leakage.