Medium/High Voltage Motors

LH Marthinusen provides specialised services for medium and high voltage motors with ratings up to 36MW and operating voltages from 1,100V to 13,800V. These machines are critical to industrial operations and require structured maintenance, repair and refurbishment to ensure reliable performance and long service life.

Motor Types and Configurations

Our capabilities support a wide range of motor types and configurations, including:

  • Squirrel cage asynchronous machines
  • Synchronous motors and alternators
  • Slipring induction motors

Equipment is serviced across:

  • 2 to 24 pole designs
  • 50Hz and 60Hz operation
  • Variable speed applications
  • Class F insulation systems

Both vacuum pressure impregnation and resin rich processes are applied to support insulation performance.

Rewinding and Electrical Services

We carry out a full range of electrical repair and modification services, including:

  • Stator and rotor rewinds
  • Partial or patch winding repairs
  • Voltage modifications
  • Speed modifications

Core repair or replacement is also undertaken to restore magnetic performance and structural integrity.

Mechanical Repairs and Component Support

Additional repair and component services include:

  • Rotor re barring using various alloys
  • Rotor end ring replacement
  • Slip ring and brushgear repair or replacement
  • Bearing changes
  • Terminal box adjustments
  • Cooler modifications
  • Base plate repairs
  • Shaft replacement

Manufacturing Capability

LH Marthinusen also offers new motor manufacture to meet specific application requirements. These are supported by controlled engineering and workshop processes to ensure reliable long-term operation.