Design and Prototype Development of H.T Sandwich Bus Duct for 7.2 kV System

Abstract

Sandwich bus ducts are normally used for power distribution in large building. In electrical power distribution, bus-bar is a strip of copper or aluminum that transfer power from one point to another point. Now a days the use of bus bar system is widely used for distribution of power in place of cable due to its compact size and less voltage drop. Sandwich bus duct is recently available in the market with the rated voltage ranging from 415V-1000 V A.C and 1500V D.C. Usually Isolated phase bus duct and Segregated bus duct are used for high voltage power distribution. The cost of insulated phase bus duct and Segregated bus duct is very high and the size is also very large.Objective of project is to model and design of H T sandwich bus duct system using FEM analysis and to develop the prototype module of the same. Moreover, the project will also portray the benefits of the sandwich type construction over the conventional bus duct system. The project work consist of finding suitable insulating material for the HT sandwich bus duct and making of sandwich duct model using SOLID-EDGE software and then analysis for various insulation material using electrodynamics analysis, electromagnetic and electrostatic analysis with help of ANSYS and ANSOFT MAXWELL software during the project work. Further temperature rise and dielectric tests have been performed on the designed prototype model as well. On the base of analysis and testing carried out, the corrective ness of proposed design of sandwich bus duct system is justied. With this study superiority and limitation of sandwich configuration over conventional system has been evaluated. The study also provides a base for exploring design of H T sandwich bus duct having larger current carrying capacity and better insulation wrapping techniques.