Laboratory Manual for Introductory Circuit Analysis
13th Edition
ISBN: 9780133923780
Author: Robert L. Boylestad, Gabriel Kousourou
Publisher: PEARSON
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Chapter 23, Problem 33P
Using a transformer from the library find the load voltage for the network in Fig. 23.66 for an applied voltage of
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The O.C of a 5 kVA 200/400 V transformer. In the test, 72 W of power was used, supplying 200 V to the transformer. S.C. In the test, full load current was passed through the secondary supplying 8 V to the primary and taken from a power supply of 80 W. Find the full load efficiency at a power factor of 0.8.
The primary of a current transformer takes 1 A at a power factor of 0.4 when it is connected across a 200-V, 50Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. What is now the value of primary current?
transformer has the characteristics founel bebw.
A single-phase, dry-type, general-purpose industrial distribution
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2 Determine the full-lead, reded- valtaye voltage regulati on of the
transformer. Assume unity power facter locud.
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Chapter 23 Solutions
Laboratory Manual for Introductory Circuit Analysis
Ch. 23 - For the air-core transformer in Fig. 23.57: Find...Ch. 23 - Repeat Problem 1 if k is changed to 1. Repeat...Ch. 23 - RepeatProblem1fork=0.3,NP=300turns,andNS=25turns.Ch. 23 - For the iron-core transformer (k = 1) in Fig....Ch. 23 - RepeatProblem4forNP=240andNS=30.Ch. 23 - Find the applied voltage of an iron-core...Ch. 23 - If the maximum flux passing through the core of...Ch. 23 - For the iron-core transformer in Fig. 23.59: Find...Ch. 23 - Find the input impedance for the iron-core...Ch. 23 - Find the voltage Vg, and the current Ip if the...
Ch. 23 - If VL=240V,ZL=20resistor,Ip=0.05AandNs=50 find the...Ch. 23 - If Np400,Ns=1200andVg=100V,findthemagnitudeofIp...Ch. 23 - For the circuit in Fig. 23.60, find the...Ch. 23 - For the transformer in Fig. 23.61, determine the...Ch. 23 - For the transformer in Fig. 23.61, if the...Ch. 23 - Prob. 16PCh. 23 - Discuss in your own words the frequency...Ch. 23 - Determine the total inductance of the series coils...Ch. 23 - Determine the total inductance of the series coils...Ch. 23 - Determine the total inductance of the series coils...Ch. 23 - Write the mesh equations for the network in Fig....Ch. 23 - Determine the input impedance to the air-core...Ch. 23 - An ideal transformer is rated...Ch. 23 - Determine the primary and secondary voltages and...Ch. 23 - For the center-tapped transformer in Fig. 23.42,...Ch. 23 - For the multiple-load transformer in Fig. 23.43,...Ch. 23 - Prob. 27PCh. 23 - Write the mesh equations for the network of Fig....Ch. 23 - Write the mesh equations for the network of Fig....Ch. 23 - A current transformer has a secondary with 250...Ch. 23 - Generate the schematic for the network in Fig....Ch. 23 - Prob. 32PCh. 23 - Using a transformer from the library find the load...
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- A transformer supplies power to a feeder that has five customers. Daily maximum demands for these customers are 150 kW, 70 kW, 120 kW, 60 kW, and 200 kW. The maximum demand on the feeder is 150kW. The coincident factor of the feeder isarrow_forward30. Which are used for power factor correction in industrial applications? - a. farads b. capacitors c. watts d. coulombsarrow_forwardDetermine the necessary transformer turn ratio for transferring maximum power to a 160 load from a source that has an output impedance of 10 kQ. Also calculate the voltage across the load if the terminal voltage of the source is 10V r. m. s. Sol : For maximum power transfer, the impedance of the primary should be equal to the output impedance of the source.arrow_forward
- Question2 Consider a 4 kVA, 200/400 V single-phase transformer supplying 80%load current at 0.8 leading power factor. The O.C./S.C. test results are as follows: O.C. test: 200 V, 0.8 A, 70 W (LV. side) S.C. test : 20 V, 10 A, 60 W (H.V. side) Calculate efficiency, secondary voltage and current into prinary at the above load.arrow_forwardThe equivalent circuit of a 22KVA, 11700/450 V, 60HZ, single-phase loaded transformer when referred to its low- voltage side is given. Find the percent efficiency of this transformer under this loading conditions. 5= 37.037 25.84A 0.225 + jl.1 2 Vs = 2.2 KA j4.5 KN 450 0 vl Select one: a. %n = 95.22 % %3D b. %n = 88.7 % c. %n = 97.4 % d. Nonearrow_forwardANSWER NUMBER 2 1. A 25 KVA transformer supplies a load of 12 kW with a power factor of 0.6 lagging. Find the percentage of full load the transformer is carrying. If an additional unity power factor loads are to be served with the same transformer, how many kW maybe added before the transformer is at full load? 2. Referring to the previous example, example, if the additional loads have a power factor of 0.866 leading, how many kVA of the loads can be added to bring the transformer to its full-load capacity?arrow_forward
- An ideal transformer is rated 12 kVA, 3600/120V, 60 Hz. Find the transformation ratio if the 120V is the secondary voltage. a = Find the current rating of the secondary if the 120V is the secondary voltage. units Is rating Find the current rating of the primary if the 120V is the secondary voltage. Ip rating unitsarrow_forward. For the iron-core transformer (k == 1) in Fig. 23.58: + E = 40 V √=60H/ N₁ = 20 HANN HA MARE, LA N. = 120 a. Find the magnitude of the induced voltage E. b. Find the maximum fluxarrow_forward!!! D. TCF 1.SI 19. Which of the following correction factors makes it possible to include the effects of both potential transformers and current transformers in an installation? A. PACF B. FCF C. RCFarrow_forward
- A 250 transformer has primary and secondary winding resistances of 0.6Omega , and 0.00151 respectively . The iron loss is 1.5 KW and the primary and secondary voltages are 6KV and 300 V respectively . If the power factor of the load is 0.7 find the secondary currentarrow_forwardAssume 120Vrms is applied to the transformer primary (from P1 to P2). What is the expected secondary voltage measured from S1 to S2? 4:1 Np = 320 Ns = 80 S2 P20 80 Vrms 15 Vrms 30 Vrms 60 Vrmsarrow_forward09. 46 46ull B/s Mohannd 4 45% O p 4:18 A moodle.nct.edu.om لا توجد بطاقة When conducting no-load test on a given single-phase transformer, the following test data were obtained : Primary voltage : 230 V; Secondary voltage : 115 V ; Primary current : 0.7 A ; Power input : 40 W. Find (i) The turns ratio (ii) the magnetizing current of no-load current (iii) Core loss current (iv) the iron loss. Turns ratio The magnetizing current of no-load current Core loss current Core loss о IIarrow_forward
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