ISOLATED PHASE BUSDUCTS

This has a tubular conductor housed in a cylindrical shaped enclosure. The conductor is supported by insulators made of porcelain or epoxy. The conductor and enclosure are formed by rolling aluminum sheets and welding the joints.

• Conductor in each phase have individual enclosures, providing total safety to the personnel.
  
  
• Both the conductor and the enclosures are circular in cross section offering optimum and most economic design for given parameters.
  
  
• The conductor supported by (1,2,3 or 4) spring loaded insulators is free to align itself along the line of zero force during short circuits, thereby the insulators will be stressed to much lower levels.
  
  
• Due to manufacturing limitations and size, the enclosures can never be perfectly circular and hence the central line of enclosure may not be the magnetic center line. The insulators in such cases are over stressed during short circuits. In the spring loaded design, the insulators align themselves along the magnetic center line and stresses to much lower levels.
  
  
• The conductor held by the machined Aluminum shoes on the insulators is freely supported. This arrangements permits free axial movement of busbars without stressing the insulators. The material of shoes being aluminum same as conductor prevent wear during axial movement of conductor.
  
  
• The IPB being air tight in construction, prevents entry of dust/moisture.
  
  
• The continuous busduct with ends of enclosures shorted, significantly lowers the magnetic fields outside the enclosure and prevents heating effect in the surrounding support structure.
  
  
• No separate earth bus is required as the enclosure itself forms an earth bus.
  
  
• The supporting insulator can be taken out or put back in position without disturbing the other insulators or the conductor. This is a very significant factor in the maintenance of the busduct.