Transformer
high
Step-up/step-down transformers for voltage conversion on board.
30 yr
Typical Lifetime
Typical Manufacturers
ABB
Siemens
SGB
Known Models (2)
ABB Marine (Finland/Switzerland) Marine Dry-Type Transformer
50-5,000 kVA
· Electrical Power Transformation
Voltage: 440V-11kV
type: Dry-Type Transformer (Marine)
size_range: ['50kVA', '200kVA', '500kVA', '1000kVA', '5000kVA']
variant_count_approx: 5
period_start_year: 1980
period_end_year: None
drive_type: N/A (passive)
construction: Cast resin or VPI (Vacuum Pressure Impregnated), marine-certified
Common Failures:
- • Winding insulation degradation from age/moisture/heat
- • Core lamination vibration noise
- • Terminal connection loosening from vibration
- • Cooling fan failure (forced-air models)
- • Partial discharge in HV windings
Service: Insulation resistance test annually. Winding temperature monitoring continuous. Core bolt torque check at 5-year survey. Fan replacement every 5-10 years.
Spares: ABB Marine. Lead time: 4-8 weeks for standard sizes. Custom sizes: 8-16 weeks.
Siemens (Germany) GEAFOL Marine Transformer
50-3,000 kVA
· Electrical Power Transformation
Voltage: 400V-11kV
type: Cast Resin Dry-Type Transformer
size_range: ['GEAFOL 50kVA', 'GEAFOL 200kVA', 'GEAFOL 1000kVA', 'GEAFOL 3000kVA']
variant_count_approx: 4
period_start_year: 1975
period_end_year: None
drive_type: N/A
construction: Cast resin insulation, marine-vibration-tested
Common Failures:
- • Cast resin cracking from thermal cycling/vibration
- • Winding insulation aging
- • Fan failure
- • Terminal loosening
Service: Standard transformer maintenance. Insulation test annually.
Spares: Siemens Transformers. Lead time: 4-8 weeks.