Field Maintenance and Repair

Transformer Onsite Maintenance

• High voltage bushing testing
• High voltage bushing replacement
• Leak repair
• Leak checking
• Re-charge of nitrogen blanket
• Installation of positive pressure nitrogen system
• Installation of cooling fans and controls
• Transformer controls trouble shooting, testing and repairs
• Transformer and LTC control upgrades

 Services

• Complete inspection and testing of load tap changing mechanism
• Remove  oil and open LTC main compartment
• Clean all carbon from mechanism
• Clean all contacts and check for wear
• Check mechanism for proper adjustment and alignment
• Replace all worn and damaged parts
• Replace all gaskets on doors of mechanism
• Check automatic controls and auxiliary equipment
• Close LTC compartment and fill with non- PCB oil

Hot Oil Processing

• Hot oil circulation and de-hydration of oil and transformer
• Removal of oil from transformer and holding in tanker during service
• Vacuum filling of transformer
• De-gassing of fluid and transformer
• Envirotemp (FR3) fluid processing

Field Dressing

• Installation of radiators
• Installation of bushings
• Installation of auxiliary equipment (fans, pumps, arresters, connectors)
• Vacuum filling of fluid
• Acceptance testing