Three 2.2-kVA, 440/220-V transformers are connected to form a three phase transformer. Each transformer has the following parameters: RH = 1.2 Ω, XH= 2.0 Ω, RL = 0.3 Ω, XL = 0.5 Ω, RcH= 2.2 kΩ and XmH = 1.8 kΩ Determine the rated (line) primary winding voltage and current, the rated (line) secondary winding voltage and current, and the equivalent ‘a’ ratio for each of the four connections. Draw the exact per phase equivalent circuit for the star/delta connection
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.
Three 2.2-kVA, 440/220-V transformers are
connected to form a three phase transformer.
Each transformer has the following parameters:
RH = 1.2 Ω, XH= 2.0 Ω, RL = 0.3 Ω, XL = 0.5 Ω,
RcH= 2.2 kΩ and XmH = 1.8 kΩ
Determine the rated (line) primary winding
voltage and current, the rated (line) secondary
winding voltage and current, and the equivalent
‘a’ ratio for each of the four connections.
Draw the exact per phase equivalent circuit for
the star/delta connection
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In the YY Connection, the Phase Current and Line Current are normally equal, can you verify also can you find the Phase voltage for all the configurations
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