Farnborough Hampshire

Installation, build-up & commissioning of 1 x 20/40MVA, 33/11.5kV transformer.
Farnborough, Hampshire

Scope of work

  • Design, manufacture and testing of 1 x 20/40MVA, 33/11.5kV, power transformer.
  • Full in-house routine, lightning impulse, temperature rise, noise test, zero sequence & partial discharge testing also including tank leakage test.

Delivery using a semi-low loader then off-loading via mobile crane and lifted into position.

Full commissioning works as per the customers 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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