A three-phase transformer bank is connected wye–delta. The primary voltage is 12,470 V, and the secondary voltage is 480 V. The total capacity of the transformer bank is 450 kVA. One of the three transformers that form the three-phase bank develops a shorted primary winding and becomes unusable. A suggestion is made to reconnect the bank for operation as an open-delta. Can the two remaining transformers be connected open-delta? Explain your answer as to why they can or why they cannot be connected as an open-delta. If they can be reconnected open-delta, what would be the output capacity of the two remaining transformers?
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 three-phase transformer bank is connected
wye–delta. The primary voltage is 12,470 V, and the secondary voltage
is 480 V. The total capacity of the transformer bank is 450 kVA. One of the three
transformers that form the three-phase bank develops a shorted primary winding and
becomes unusable. A suggestion is made to reconnect the bank for operation as an
open-delta. Can the two remaining transformers be connected open-delta? Explain
your answer as to why they can or why they cannot be connected as an open-delta.
If they can be reconnected open-delta, what would be the output capacity of the two
remaining transformers?
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