You have been privately contacted to rewire a site. During a visit, you observed that the building receives a 400V, 60Hz, star-connected, three-phase supply from the utility. There are also several three-phase equipment that require a 230V three-phase supply. You have decided to utilize three single-phase, dry type transformers to step down the building’s incoming supply to a 230V, delta-connected supply for the equipment. All the three-phase machinery can be modelled as an equivalent balanced three-phase star-connected load with a resistance and inductance of 0.5Ω and 0.16mH respectively per phase. Some preliminary calculations and analysis are required before starting the wiring design. Draw a labelled diagram of the entire three phase system clearly showing all known voltages (phase and line values) and the three phase configurations of all components.
Three-Phase Transformers
Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.
Transformer
Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.
You have been privately contacted to rewire a site. During a visit, you observed that the building receives a 400V, 60Hz, star-connected, three-phase supply from the utility. There are also several three-phase equipment that require a 230V three-phase supply. You have decided to utilize three single-phase, dry type transformers to step down the building’s incoming supply to a 230V, delta-connected supply for the equipment. All the three-phase machinery can be modelled as an equivalent balanced three-phase star-connected load with a resistance and inductance of 0.5Ω and 0.16mH respectively per phase. Some preliminary calculations and analysis are required before starting the wiring design.
Draw a labelled diagram of the entire three phase system clearly showing all known voltages (phase and line values) and the three phase configurations of all components.
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