Teshmont provided the following services:

• Feasibility studies
  
  
• Harmonic filter studies
  
  
• Assistance with preparation of converter equipment and dc
  submarine cable specifications
  
  
• Assistance with evaluating tenders
  
  
• Commissioning the dc system
  
  
• Transient studies for the dc line fault locator
  
  
• Studies of the dc transmission line to determine the clearances and insulation requirements for the uprated dc transmission line, which
  included identification of towers which required modification
  
  
• Study of the insulation requirements and calculation of corona loss, RI, AN and electrical effects
  
  
• Assistance with investigations to extend the dc system to Auckland,
  which included analyzing costs, voltage, rating and cable type for three HVDC transmission alternatives between the North and South Islands
  
  
• Developed replacement cost estimates for the New Zealand cable system