A 30-MVA alternator with 15% reactance is connected to a bus bar. A second alternator rated 25-MVA with 10% reactance is also connected through a 10% bus bar reactor to the same bus bar. Both of these reactances are based on 25 MVA. If a feeder taken out from the bus bars through a circuit breaker develops a 3-phase fault, what should be the appropriate MVA rating of the circuit breaker? (325 MVA)
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.
A 30-MVA alternator with 15% reactance is connected to a
bus bar. A second alternator rated 25-MVA with 10% reactance is also
connected through a 10% bus bar reactor to the same bus bar. Both of
these reactances are based on 25 MVA. If a feeder taken out from the
bus bars through a circuit breaker develops a 3-phase fault, what should
be the appropriate MVA rating of the circuit breaker?
(325 MVA)
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