Connect 1 Semester Access Card For Electric Motors And Control Systems
2nd Edition
ISBN: 9781259550195
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Question
Chapter 3.3, Problem 2RQ
To determine
(a)
The type of polarity indicated in the polarity test.
To determine
(b)
The value of voltage across the secondary winding.
To determine
(c)
The labeling of the unmarked leads of the transformer.
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Students have asked these similar questions
Q3-A)-Indicate whether the following statements are true or false and correct the false statements
The short encurt test of
2-
3- The output po
4- The load losses in transformer depends upon voltage and frequency.
5- Hysteresis loss in a transformer varies as maximum flux density.
6- If the reactance/resistance ratios of the two parallel transformers are not equal, the power factor of
the load will be equal.
7- Power transformers are generally designed for maximum efficiency around 75% of full load.
8- The full-load copper loss of a transformer is 1600 W. At half load, the copper loss will be 400 W.
For the transformer shown in Figure Q3 (a), Determine the following.
i. The turn ratio
ii. The secondary voltage
iii. The primary voltage and primary current
Is=0.1A
Np=50t
Ns=100t
R.
8kn
Figure Q3 (a)
Identify the type of Transformer referred to K=0.7
a. Step down
b. Voltage transformer
c. Step up
d. isolation
Chapter 3 Solutions
Connect 1 Semester Access Card For Electric Motors And Control Systems
Ch. 3.1 - Prob. 1RQCh. 3.1 - a. If 1 MW of electric power is to be transmitted...Ch. 3.1 - Compare the type of AC power normally supplied to...Ch. 3.1 - a. Outline the basic function of a unit...Ch. 3.1 - list three factors taken into account in selecting...Ch. 3.1 - When motors and motor controllers are installed,...Ch. 3.1 - a. What types of conduit raceways are commonly...Ch. 3.1 - Compare the function of a switchboard, panelboard,...Ch. 3.2 - Define the terms primary and secondary as they...Ch. 3.2 - On what basis is a transformer classified as being...
Ch. 3.2 - Explain how the transfer of energy takes place in...Ch. 3.2 - In an ideal transformer, what is the relationship...Ch. 3.2 - A step-down transformer with a Wins ratio of 10:1...Ch. 3.2 - A step-up transformer has a primary current of 32...Ch. 3.2 - What is meant by the term transformer magnetizing,...Ch. 3.2 - Prob. 8RQCh. 3.2 - Prob. 9RQCh. 3.2 - Prob. 10RQCh. 3.2 - The primary of a transformer is rated for 480 V...Ch. 3.2 - A single-phase transformer is rated for 0.5 kVA, a...Ch. 3.3 - Explain the way in which the high-voltage and...Ch. 3.3 - Prob. 2RQCh. 3.3 - Prob. 3RQCh. 3.3 - Prob. 4RQCh. 3.3 - Prob. 5RQCh. 3.3 - Prob. 6RQCh. 3.3 - Prob. 7RQCh. 3.3 - Prob. 8RQCh. 3.3 - Explain the basic difference between the primary...Ch. 3.3 - Prob. 10RQCh. 3.3 - Prob. 11RQCh. 3.3 - Prob. 12RQCh. 3.3 - What important safety precaution should be...Ch. 3.3 - Prob. 14RQCh. 3.3 - The control transformer for an across-the-line...Ch. 3.3 - The two primary windings of a dual-primary control...Ch. 3.3 - Prob. 3TCh. 3.3 - A dry-type general-purpose power transformer is...Ch. 3.3 - A current transformer is to be tested in circuit...Ch. 3.3 - Discuss how electric power might be distributed...Ch. 3.3 - A block of several transformers arc fed from...Ch. 3.3 - How would you proceed with a DC resistance check...Ch. 3.3 - Prob. 5DT
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Similar questions
- The number of turns of the primary winding of a single phase transformer is N1=600 and the transformer ratio is 20. Number of turns of the secondary winding is * 3.arrow_forwardA voltage transformer in Figure 8 has 1,500 turns of wire on its primary winding and 500 turns of wire for its secondary winding. What will be the turns ratio, a of the transformer. If 240 volts is applied to the primary winding, what will be the resulting secondary voltage. And if a 400 n resistor is connected to the secondary winding, what are the values of current Is and Ip. primary Vp Transformer Core NF Ns Figure 8 secondary Vsarrow_forwardExample 2-2. The equivalent circuit impedances of a 20-kVA, 8000/240-V, 60-Hz transformer are to be determined. The open-circuit test and the short-circuit test were performed on the primary side of the transformer, and the following data were taken: Open-circuit test (on primary) Short-circuit test (on primary) Voc = 8000 V Vsc = 489 V loc = 0.214 A Isc = 2.5 A Voc = 400 W Ps = 240 Warrow_forward
- What is current transformer? 2 difference between current and potential transformers.arrow_forwardAnswer only please The resistance of a transformer winding is 0.25 ohm at 25oC. When operating at full load, the temperature of the winding is 75oC. The temperature coefficient of resistance for copper at 0oC is 0.00427 per oC. What is the winding resistance at full load? a. 0.512 ohm b. 0.315 ohm c. 0.298 ohm d. 0.271 ohmarrow_forwardDue to the increase in load, what change you saw in the transformer’s output power and voltage regulation?arrow_forward
- dentify the test used to measure the copper losses of the transformer. With necessary diagram explain the ame.arrow_forward2. Define the voltage regulation of the transformer?arrow_forwarda) The transformer has a turns ratio of 9.45, what is the dc load voltage considering the ripple voltage? b) The transformer has a turns ratio of 9.45, what is the dc load voltage without considering the ripple voltage?in 2 decimal places.arrow_forward
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