Routine Maintenance Manual for Wind Turbine

I. Maintenance Schedule

Newly Commissioned Units: Perform the first routine maintenance after 500 hours of operation (approximately one month).

Operational Units: Perform routine maintenance every 5000 hours or once per year.

II. Blade Maintenance

Crack and Damage Treatment

- If cracks extend to the reinforced fiberglass layer, repair is mandatory.

- If the blade shell is damaged, notify the manufacturer for repair.

- Repairs can be performed onsite when ambient temperature is ≥10℃. If below, delay repairs

- Do not operate the turbine until the adhesive is fully cured after repair.

- Inspect lightning protection wiring for integrity, no breaks or loose connections.

- Check for signs of lightning strike (burn marks, cracks, clicking noise).

Blade Bolt Inspection

- Check that all blade installation bolts meet specified torque.

- Inspect bolts for rust or damage; replace if necessary.

III. Electrical System Maintenance

- Check whether the data feedback of each sensor is normal.

- Check and tighten the cable terminals to prevent false connection and looseness.

- Use an insulation tester to test the main circuit to ensure that the insulation value is within the normal range.

- Check the appearance of the cable and the generator lead pole for aging and breakage.

- Check the main electrical components and module plug-ins to confirm that their appearance is not burned and the connection is firm.

- Check whether the control cabinet buttons and displays respond and display normally.

- Check the sealing of the control cabinet to ensure dust and moisture resistance.

- Check the lightning protection system and grounding device, measure whether the grounding resistance meets the requirements, and check the connection reliability.

IV. Mechanical System Maintenance

- Check torque of all critical bolts to ensure tightness.

- Inspect lubrication at all lubrication points.

- Inspect tower welds, flange connections, and auxiliary equipment.

- Check whether the clearance of the brake pads meets the requirements and adjust them in time if necessary.

- Check the overall corrosion protection and maintain if needed.

V. Generator Maintenance (Permanent Magnet Generator)

- Measure stator winding insulation resistance to ensure safety.

- Inspect rotor poles for demagnetization, damage, or corrosion.

- Check bearing operation for abnormal noise or overheating.

- Check the generator casing and fasteners for looseness.

- For lubricated bearings, check if grease is adequate and clean.