Design and construct a three phase 5kVA, 1/0.415kV power transformer

Abstract

The purpose of this Final Year Project is to understanding the knowledge and theoretical of three phase transformer. The three phase transformer which is step-up from 415V to 1000V with a capacity 5kVA has been designed. In this project, the design is included core and winding. In core design, the core material has been chosen for transformer design. Type of high efficiency core stack has to choose to make a core cutting. The number of winding has calculated to let the voltage at primary side step up to secondary side. After finish the core cutting and number of winding, the core and winding is assembly to be full product. The testing such as polarity test, ratio test, short circuit test, open circuit test and load test are done on the transformer. The tests are done to know the efficiency of transformer. From the result of investigation, it found that parameter impedance is Z1 is 19.51+j19.81Ω and Z2 is 1.121+j1.138Ω. The maximum efficiency of transformer is 95.26 percent when the induced voltage is 5.01V. Therefore, the design is more efficiency, more stable and low noise which environment friendly.