Hitachi Wye-Ring Repair

• Customer

• Site - WTG

• Completion Date

  Date

• Prepared by

• Technicians

• Signature

  Sign

1. Generator

• Generator Type

• Generator SN

• Generator Plate

  Media

2. Nacelle Condition

• Before

  Media

• After

  Media

• Notes

3. Brush Box

• Before

  Media

• After

  Media

• Notes

4. Slipring

• Original SN

• Original SN

  Media

• Original Slipring Overview

  Media

• Replacement SN

• Replacement SN

  Media

• Replacement Overview

  Media

• Notes

5. Rotor Box

• Before

  Media

• After

  Media

6. Generator Internal

• Before

  Media

• After

  Media

• Notes

7. Bearing

• Original SN

• Bearing Type

• Original Bearing

  Media

• Replacement SN

• Replacement Bearing Type

• Replacement Bearing

  Media

8. Wye-Ring

• Original Connections (3)

  Media

• Exposed Connections (3)

  Media

• Crack(s) found?

  Select Yes No 1 2

  • Yes
  • No
  • 1
  • 2

• Pictures of Crack(s)

  Media

• Isolated Connections

  Media

• Completed Installation

  Media

• Shims Stack 1

  Select 6.35 mm (0.25 in) 7.11 mm (0.28 in) 7.87 mm (0.31 in) 8.63 mm (0.34 in) 9.65 mm (0.38 in) 10.41 mm (0.41 in) 11.17 mm (0.44 in) 11.93 mm (0.47 in) 12.70 mm (0.50 in) 13.46 mm (0.53 in) 14.47 mm (0.57 in) 15.24 mm (0.60 in) 16.00 mm (0.63 in)

  • 6.35 mm (0.25 in)
  • 7.11 mm (0.28 in)
  • 7.87 mm (0.31 in)
  • 8.63 mm (0.34 in)
  • 9.65 mm (0.38 in)
  • 10.41 mm (0.41 in)
  • 11.17 mm (0.44 in)
  • 11.93 mm (0.47 in)
  • 12.70 mm (0.50 in)
  • 13.46 mm (0.53 in)
  • 14.47 mm (0.57 in)
  • 15.24 mm (0.60 in)
  • 16.00 mm (0.63 in)

• Shims Stack 2

  Select 6.35 mm (0.25 in) 7.11 mm (0.28 in) 7.87 mm (0.31 in) 8.63 mm (0.34 in) 9.65 mm (0.38 in) 10.41 mm (0.41 in) 11.17 mm (0.44 in) 11.93 mm (0.47 in) 12.70 mm (0.50 in) 13.46 mm (0.53 in) 14.47 mm (0.57 in) 15.24 mm (0.60 in) 16.00 mm (0.63 in)

  • 6.35 mm (0.25 in)
  • 7.11 mm (0.28 in)
  • 7.87 mm (0.31 in)
  • 8.63 mm (0.34 in)
  • 9.65 mm (0.38 in)
  • 10.41 mm (0.41 in)
  • 11.17 mm (0.44 in)
  • 11.93 mm (0.47 in)
  • 12.70 mm (0.50 in)
  • 13.46 mm (0.53 in)
  • 14.47 mm (0.57 in)
  • 15.24 mm (0.60 in)
  • 16.00 mm (0.63 in)

• Shim Stack 3

  Select 6.35 mm (0.25 in) 7.11 mm (0.28 in) 7.87 mm (0.31 in) 8.63 mm (0.34 in) 9.65 mm (0.38 in) 10.41 mm (0.41 in) 11.17 mm (0.44 in) 11.93 mm (0.47 in) 12.70 mm (0.50 in) 13.46 mm (0.53 in) 14.47 mm (0.57 in) 15.24 mm (0.60 in) 16.00 mm (0.63 in)

  • 6.35 mm (0.25 in)
  • 7.11 mm (0.28 in)
  • 7.87 mm (0.31 in)
  • 8.63 mm (0.34 in)
  • 9.65 mm (0.38 in)
  • 10.41 mm (0.41 in)
  • 11.17 mm (0.44 in)
  • 11.93 mm (0.47 in)
  • 12.70 mm (0.50 in)
  • 13.46 mm (0.53 in)
  • 14.47 mm (0.57 in)
  • 15.24 mm (0.60 in)
  • 16.00 mm (0.63 in)

• Bolt Length 1

  Select 50 mm 55 mm 60 mm 65 mm 70 mm

  • 50 mm
  • 55 mm
  • 60 mm
  • 65 mm
  • 70 mm

• Bolt Length 2

  Select 50 mm 55 mm 60 mm 65 mm 70 mm

  • 50 mm
  • 55 mm
  • 60 mm
  • 65 mm
  • 70 mm

• Bolt Length 3

  Select 50 mm 55 mm 60 mm 65 mm 70 mm

  • 50 mm
  • 55 mm
  • 60 mm
  • 65 mm
  • 70 mm

• Pictures of Shims Stacks

  Media

• Insulated Connections

  Media

9. High Speed Coupler

• Before

  Media

• Type

  Fender

  KTR

• After

  Media

• Pre Axial Measurement (mm)

• Pre Axial Measurement (mm)

  Media

• High Speed Coupler Hub - Torqued

  Media

• Post Axial Measurement (mm)

• Post Axial Measurement (mm)

  Media

• Torque Value

10. Balance

• Initial Imbalanced (mm/s)

• Initial Imbalanced (mm/s)

  Media

• Final Balance Quality < 0.08 mm/s

• Final Balance Quality

  Media

• Weight (s) Applied (g)

11. Status

• Tower Online?

  Yes

  No

• Status Picture

  Media

• Explanation

12. Additional Notes/Findings

• Notes

• Findings

  Media