Overhauling of Transformers

  • Washing of Core coil assembly by clean oil and re-tightening of clamping structure
  • Cleaning of core coil assembly (CCA) and removal of sluge to avoid hotspots in the core and the windings.
  • Removal of moisture from oil to prevent deterioration of the life of the cellulose insulation and monitoring the degree of polymerization (DP) of paper.
  • Improvement in the insulation parameters like Polarisation (PI) & Tan Delta
  • Fuctional checking of supervisory devices like Bucholz relay, PRV, MOG, OTI, WTI etc
  • Overhauling of OLTC etc.

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