Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 1RQ
How many transformers are needed to make an open-delta connection?
Expert Solution & Answer
To determine
The number of transformer required to make an open-delta connection.
Explanation of Solution
Two transformers are required to make an open delta connection.
The below figure represents the open-delta connection.
Figure-(1)
The first transformer is connected between
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Chapter 8 Solutions
Electrical Transformers and Rotating Machines
Ch. 8 - How many transformers are needed to make an...Ch. 8 - Two transformers rated at 100 kVA each are...Ch. 8 - Prob. 3RQCh. 8 - Assume that a line voltage of 2400 volts is...Ch. 8 - Prob. 5RQCh. 8 - How much current is flowing through the secondary...Ch. 8 - How much current is flowing through the primary...Ch. 8 - Prob. 8RQCh. 8 - Prob. 9RQCh. 8 - How much current is flowing in the secondary...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Refer to the transformer shown in Figure 5-13 to answer the following questions. The transformer shown in Figure 5-13 is supplying 325 volt amperes to a load. The primary voltage is 240 volts. What is the primary current? Figure 5-13 Autotransformer practice problems.arrow_forwardIf the load in question 7 was supplied by two autotransformers connected in open delta, what would be the minimum standard size transformers that could be used to supply this load?arrow_forwardRefer to the transformer shown in Figure 5-13 to answer the following questions. What is the turns ratio of the winding between points B and E as compared to the winding between points D and E? Figure 5-13 Autotransformer practice problems.arrow_forward
- What is one advantage of shell-type construction in small control transformers?arrow_forwardA 480-volt three-phase load is rated at 34.5 kVA. It is to be supplied with variable three-phase voltage. Because the load is continuous, the transformers ratings are to be increased by 1.25% of the rated load. Three variable autotransformers are used to supply this load. Refer to Table 4-2 and determine the standard size of each transformer that should be used to make this connection.arrow_forwardA delta connection has 30 A of current flowing through each phase winding. How much current is flowing through each of the lines supplying power to the load?arrow_forward
- What is a transformer?arrow_forwardThe large interconnecting line between the indoor and outdoor coil is the _____line.arrow_forwardAn AC power source is connected across 325 turns of an autotransformer, and the load is connected across 260 turns. What is the turns ratio of this transformer?arrow_forward
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