Slough Berkshire

Installation & commissioning of 1 x 20/40MVA, 33/11.5kV transformer.
Slough, Berkshire

Scope of work

  • Design, manufacture and testing of 1 x 20/40MVA, 33/11.5kV power transformer.
  • Full in-house routine, lightning impulse, noise, temperature rise & partial discharge testing.
  • The 50 ton transformer was delivered fully built using a  low loader vehicle, then skidding into position by Collett & Sons’ heavy lift team.

All site works were complete within 3 days of collection of the transformer from Winder Power, Pudsey.

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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