Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 6, Problem 4RQ
To determine
The primary winding connection when the transformer operates at 480V.
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A transformer has a primary voltage of 480 volts and a secondary voltage of 20 volts. What is the turns ratio of the transformer?
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- How are larger control transformers supplying a motor control center usually cooled?arrow_forwardAssume that a line voltage of 2400 volts is connected to the primary of the three-phase transformer and the line voltage of the secondary is 240 volts. What is the turns ratio of the transformer?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 are the basic steps of transformer maintenance?arrow_forwardWhat factors govern the type of maintenance procedures and the maintenance intervals for transformers?arrow_forwardA 10 kVA transformer has a primary voltage rating of 240 volts and a secondary voltage rating of 480 volts. The transformer is connected to a circuit protected by a 100 ampere circuit breaker. The secondary is protected by a 25-ampere fuse. Does the primary require separate overcurrent protection?arrow_forward
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