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Isolated Phase Bus Duct

Isolated phase bus-duct

Application

Used in Power Generating Stations and Industrial applications for higher capacity generator (up to 800MW) connections, interconnections between transformer to switchgear and Switchgear to Switchgear.

Ratings

12kV to 36kV, & rated currents up to 30000A with natural cooling & up to 55000A utilizing forced air cooling. & 50 / 60 Hz.

Salient Features

  • Independent Phase: Nearly nil mutual induction.
  • Voltage rise in Enclosure : Very Low
  • Excellent shielding under short circuit conditions: Near elimination of forces.
  • negligible induction with neighbouring equipment: No heat and loss effect.
  • Independent Enclosures: Phase to Phase fault impossible.
  • continuously welded enclosures:
    • No water and dust ingress.
    • Better insulation resistance.
    • Enhanced efficiency of bolted contacts.
  • Free movement of conductor during expansion: No cantilever forces on insulators.
  • Enclosures insulated from support structures:
    • Avoids undesirable induced circulating current beyond regular path.
    • No undesirable current loops and hence no heating in supporting beams.