Substation Services: Equipment Repair & Modifications

equipment repairs

Southwest Electric has vast experience in any substation electrical equipment repair and/or modification you may need. A common requirement for most transformer owners and operators is for Load Tap Changer (LTC) Maintenance, Upgrading & Retrofitting.  Our skilled, factory trained technicians have performed routine maintenance, upgrading and retrofitting hundreds of LTC’s from every make and model.

As transformers age, the original gasket material deteriorates and leaks can become visible at gauges, valves, radiator flanges, access covers and bushings. If your transformer will no longer hold positive pressure or if you are constantly changing nitrogen bottles you may have faulty gaskets on your unit. Applying Epoxy to certain leaks can help for a while but ultimately the best way to repair a leaking unit is to replace all the gaskets with modern material such as Buna-Nitrile and Viton depending on the application. Southwest Electric Company has regasketed thousands of transformers from every make, vintage and manufacturer.

Southwest Electric Company can bring any needed parts to your site to be able to handle any needed repairs, upgrades or replacement of your LTC or gaskets.

Detailed Services Offered

  • Drain LTC into SWE supplied containment
  • Replace Contacts, check mechanism alignment and timing
  • If needed replace tap heads and phase moldings
  • Replace/Upgrade the entire mechanism on some units such as GE LRT-200
  • Check relays for proper functioning
  • Regasket barrier board if perimeter gasket is damaged
  • Replace barrier board if cracked
  • Regasket leads through barrier board
  • Replace all LTC compartment, throat, access and door gaskets
  • Install LTC filtration system
  • Retrofit with Reinhausem RMV-II mechanism
  • Modify preventive auto transformer if required
  • Manufacture a transition cubicle for new RMV-II
  • Refill unit with new oil
  • Complete disassembly and removal of all ancillary devices
  • Regasketing of all orifices with Buna-Nitrile or Viton as required or requested
  • Repacking of butterfly valves
  • Repacking of NLTC
  • Regasketing of bushings and turrets where applicable
  • Leak repair of individual items such as gauges, radiators, bushings, bushing turrets, pumps, LTC compartments, etc…
  • Cold-Weld epoxy repair of radiator fins and other difficult to repair items
  • Certified Welder for seam and other area welding
  • Vacuum filling and testing after repairs are completed