6. A 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 second-ary is protected by a 25-ampere fuse. Does the primary require sep-arate overcurrent protection? 7. What size conductor should be used to connect the primary of the transformer described in question #6? Assume the conductor to be copper with type THW insulation

6. A 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 second-ary is protected by a 25-ampere fuse. Does the primary require sep-arate overcurrent protection? 7. What size conductor should be used to connect the primary of the transformer described in question #6? Assume the conductor to be copper with type THW insulation

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 3.55P: A single-phase l0-kVA,2300/230-volt,60-Hz two-winding distribution transformer is connected as an...

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4. A single-phase, 1000-kVA, 2400/8000-V, 60HZ distribution transformer has the following parameters: Resistance of the 2400-V winding: R1 = 2.75 2 Resistance of the 8000-V winding: R2 = 29.4 2 Leakage reactance of the 2400-V winding: X1= 1.8 Q Leakage reactance of the 8000-V winding: X2 = 20 2 Exciting admittance on the 2400-V side: 0.002 - j0.008 S %3| Draw the equivalent circuit referred to the high voltage side of the transformer. a. b. Draw the equivalent circuit referred to the low voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits. 5. The transformer in Problem 4. is supplying a rated load of 1000-kVA at a rated secondary voltage of 8000 V and at 0.8 power factor lagging. Neglecting the transformer exciting current, determine the input terminal voltage of the transformer on the low-voltage side.
(Question 2): Answer the following questions: 1. The equivalent circuit impedances of a 20-kVA, 800CV240-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) VDC=8000V VS.c=489V IDC=0.214 ISc=2.5A PDC=400W PS.C=240W Find the impedances of the approximate equivalent circuit referred to the primary side, and sketch that circuit. 2. Based on the following Simulink model, answer the following questions: Continu pover Geet Gebe Rator p n Lea N) Ceongre tre ma Main Aaitay wengs Curet nent Mean nuoed Torge N nuneng reA votag eaen+ wineng A Singe Pa Anonenous ne Spe samgcapacter Froms Le votag Lne Curet From? (a) For which type of single phase induction motors does this circuit represent? (b) Explain the purpose of C1 in induction motors? (c) How to reverse the direction of rotation of this motor ? (d)…
not use ai please
There are two images, please answer parts a, b, and c and label them.
please help me on how to come up with the answer . only in (ii) and (iii) thank you
Electromechanical energy conversion
If the secondary side of a dual-voltage single phase transformer, as per figure 1, were to be connected in series, the rated output current would be equal to the -A- current rating of the individual coils, B- sum of the current rating of the individual coils, C- either "a" or "b", D- neither "a" nor "b". If secondary side of the a dual-voltage single phase transformer, as per figure 1, were to be connected in paralle, the rated output current would be equal to the A- current rating of the individual coils, B- sum of the current rating of the individual coils, C- either "a" or "b", D- neither "a" nor "b". The poles of a magnet tend to be____________. A - at the ends of the magnet, B- in the middle of the magnet, C -all around the magnet, D- none of the above.
Three 60-VA, 120/208-V, single-phase transformers are to be used to form a three-phase transformer. For each of the four connections. Determine: (a) phase voltages, (b) phase currents, (c) a-ratio (d) power rating.
Example 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 W
1. Explain why transformer saturation occurs at a lower voltage value when the frequency of the ac power source is decreased?
12.a. Comparing the transformer cores of core-form and shell-form transformers shows that thea. shell form provides lower reactance without increasing the transformer size.b. core form makes possible wider coils and better oil circulation.c. shell form is used exclusively in small low-voltage transformers.12.b. Distribution transformers are generally protected from damage due to excessive internal temperatures,by the operation of aA. lightning arrester.B. circuit breaker.C. surge diverter.