Engineering Services

Transformers

Full Range of Services

Economic justification for preventative transformer maintenance as opposed to the 'run till failure occurs' idea is not difficult to prove. One only has to contemplate the potential for consequential loss of an unplanned interruption to supply, to make a good case for well-planned preventative maintenance. Unplanned outages can cause loss of production for a frustratingly extensive duration because of factors such as long lead times for replacement parts and/or unavailability of maintenance personnel at the critical moment. Nilsen Engineering Services provides a broad selection of programs designed to extend the economical life of transformers.

Nilsen Engineering Services' maintenance programs assure you, our customer, maximum availability of electrical power, under safe conditions, and of high quality. We are very conscious of the expense associated with unscheduled interruptions to your business, and therefore deliver highly cost-effective preventative maintenance programs that provide the overall lowest cost of asset ownership. Power quality is of great importance as well, and we apply our experience and skills to provide quality levels that ensure the correct operation of motors and other electrical loads. Our range of services includes:

• Electrical load surveys and plans to assist in economical power usage
• Protection system analyses including grading of protection systems
• Detailed inspection of transformers, switchboards, busbars, cable terminations,
  etc to identify potential and actual problem areas
• Power factor and harmonic surveys
• Detailed engineering reports
• System management recommendations
• Detailed proposals and costings for comprehensive maintenance plans
• Implementation

Nilsen also has skilled personnel available, 24 hours per day, for any emergency. Nilsen Engineering Services for lowest cost asset ownership.

Preventative Maintenance is Your Best Investment

Economic justification for preventative transformer maintenance as opposed to the 'run till failure occurs' idea is not difficult to prove. One only has to contemplate the potential for consequential loss of an unplanned interruption to supply, to make a good case for well-planned preventative maintenance. Unplanned outages can cause loss of production for a frustratingly extensive duration because of factors such as long lead times for replacement parts and/or unavailability of maintenance personnel at the critical moment. Nilsen Engineering Services provides a broad selection of programs designed to extend the economical life of transformers.

Services include:

• Automatically scheduled annual oil screen tests to build a long term history
• Verification of sludge-free operation to build a long term history
• Setting an upper temperature threshold (eg: 60 deg.C) to extend transformer life
• Regular dissolved gas analyses to check for internal faults or deteriorating connections
• Periodic electrical tests
• Checking for factors in the oil, promoting cellulose deterioration
• Regular inspection, calibration and maintenance of all transformer protective devices
• Tap changer operational checking including correct functioning between steps in accordance with name plate
• Verification of turns ratio
• Checking for DC overpotential
• Weather proofing of transformer case and seals
• Cleaning bushings and insulation
• Inspection of connectors and cables
• Regular thermography recording
• Transformer winding repairs
• Tank leak repairs on-site

Nilsen preventative maintenance eliminates unplanned power outages.