Slough Berkshire

Installation & commissioning of 1 x 15/30MVA, 33/11.5kV transformers
Slough, Berkshire

Scope of work

  • Design, manufacture and testing of 1 x 15/30MVA, 33/11.5kV power transformer.
  • The transformer was delivered fully built using a low loader then off-loading via mobile crane and lifted into position.

Full in-house routine & partial discharge testing.

Full commissioning works as per the customer’s specification which includes;

  • Insulation resistance of each winding, core & secondary circuits
  • Transformer ratio check
  • Vector group check by 3 phase low voltage energisation of transformer
  • Checks on all CTs & VTs for insulation resistance
  • Ratio & magnetisation curves
  • Operation of tapchanger through range & operation of limit switches
  • Operation of protection equipment
  • Oil sampling for routine
  • Water & dissolve gas analysis

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