2.29 Three 10, 100 kVA, 2300/460 V, 60 Hz transformers are connected to form a 30, 2300/460 V trans- former bank. The equivalent impedance of each transformer referred to its low-voltage side is 0.045 +10.16 2. The transformer is connected to a 36 source through 30 feeders, the impedance of each feeder being 0.5 +j1.5 2. The transformer delivers full load at 460 V and 0.85 power factor lagging. (a) Draw a schematic diagram showing the transformer connection. (b) Determine the single-phase equivalent circuit. (c) Determine the sending end voltage of the 30 source. (d) Determine the transformer winding currents.

2.29 Three 10, 100 kVA, 2300/460 V, 60 Hz transformers are connected to form a 30, 2300/460 V trans- former bank. The equivalent impedance of each transformer referred to its low-voltage side is 0.045 +10.16 2. The transformer is connected to a 36 source through 30 feeders, the impedance of each feeder being 0.5 +j1.5 2. The transformer delivers full load at 460 V and 0.85 power factor lagging. (a) Draw a schematic diagram showing the transformer connection. (b) Determine the single-phase equivalent circuit. (c) Determine the sending end voltage of the 30 source. (d) Determine the transformer winding currents.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.47P: Consider the oneline diagram shown in Figure 3.40. The three-phase transformer bank is made up of...

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Concept explainers

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.

Question

2.29
Three 10, 100 kVA, 2300/460 V, 60 Hz transformers are connected to form a 36, 2300/460 V trans-
former bank. The equivalent impedance of each transformer referred to its low-voltage side is
0.045 +10.16 2. The transformer is connected to a 36 source through 30 feeders, the impedance of
each feeder being 0.5 +j1.52. The transformer delivers full load at 460 V and 0.85 power factor
lagging.
(a) Draw a schematic diagram showing the transformer connection.
(b) Determine the single-phase equivalent circuit.
(c) Determine the sending end voltage of the 30 source.
(d) Determine the transformer winding currents.

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