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Ecclesfield, Sheffield


Client: Undisclosed
Location: Ecclesfield, Sheffield
Objective: On site refurbishment of 2 x 15/18.75MVA 66/11.5kV Transformers

Scope of Work

  • Extract oil samples from the main tank before the commencement of the works and upon completion.
  • Fully drain the transformer of oil, store locally off site, noting ERTS requirements.
  • Arrange for a mobile oil filtration unit to de gas and circulate the oil for 12 hours as per customer specifications.
  • Replacing the existing 18 No elliptical tube type radiators and fit 8 No new radiators.
  • Supply/fit 1 No 3DE buchholz relay, c/w bleed and sampling pipes/taps.
  • Supply/fit 1 No Brownell size W dehydrating breather.
  • Supply/fit 1 No new Qualitrol 208 series 12PSI PRD with deflector shield.
  • Re-gasket flange connections that are leaking oil including, 3 No main 6” valves inspection covers on the main cover, instrument capillary pocket on the main cover, tank side inspection covers, bellows on header pipes, tap changer covers.
  • Control kiosk to be preserved by carrying out any patch repairs to the steel work as necessary, renew the rubber door seals as required.
  • Steam clean transformer and concrete base.
  • Rust treat and paint as per the customer specification: Main transformer tank, cooler frame, conservator and pipework, NER, Control kiosk, and aux transformer.
  • Complete all small auxiliary wiring for the buchholz as per the specification.
  • Labels – Supply and fit new warning labels.