Introductory Circuit Analysis
13th Edition
ISBN: 9780133923919
Author: Boylestad, Robert L.
Publisher: Pearson Education
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Chapter 23, Problem 9P
Find the input impedance for the iron-core transformer of Fig. 23.59 if
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Chapter 23 Solutions
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 5,000-kVA, 3-phase transformer, 13.2/33-kV, A/Y, has a copper loss of 11 kW. The impedance drop at full-load is 7.5%. Calculate the primary voltage when a load of 4000 kW at 0.8 p.f. is delivered at 33 kv.arrow_forwardA 25 KVA transformer supplies a load of 12 KW at a power factor of 0.6 lagging. Find the percentage of full load the transformer is carrying.arrow_forwardA single-phase, 50kVA, 2400:240V distribution transformer has an impedance of 0.72+j0.92Ω from the high voltage winding and 0.007+j0.009Ω from the low voltage winding. This transformer is supplied by a feeder whose impedance is 0.3+j1.6Ω. Determine the voltage at the emitter terminal of the feeder when the load connected to the transformer secondary draws rated current at 240V with 0.8 lagging power factor. For this case, it is convenient to use the approximate circuit of the transformer given below. PLEASE, TYPE, HAND WRITING GETS UNDERSTANDING,arrow_forward
- A 300kVA transformer has primary and secondary winding resistances of 0.5Ω, and0.0015Ω respectively. The iron loss is 1.5 KW and the primary and secondary voltages are5kV and 250 V respectively. If the power factor of the load is 0.8lag, find the efficiency of thetransformer at 40% of full load.arrow_forwardA 40-kVA, 8000/230-V distribution transformer has an impedance referred to the primary of 18 + j80 Ω. The components of the excitation branch referred to the primary side are Rc = 100 kΩ and Xc = 20 kΩ. If the primary voltage is 7920 V and the load impedance is ZL = 1.5 + j*0.7 Ω what is the secondary voltage, in volts?arrow_forwardA 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_forward
- A 5232/436 volts, 41 hz, 180 504 KVA step-up transformer is connected to a source having a line frequency of 41 hz. Calculate the output frequency.arrow_forwardA 246 kVA transformer has a primary winding resistance of 0.55 and a secondary winding resistance of 0.002 Q. The iron loss is 3 kW and the primary and secondary voltages are 4 kV and 245 V respectively. If the power factor of the load is 0.85,then determine the efficiency of the transformer on 25 % load.arrow_forwardCalculate Required size of core and calculate number of turns in primary and secondary for small transformer whose, Output (secondary) voltage (Vs or Vo)= 12. V Output (secondary) current Io = 3 A Primary voltage, Vp = 230 V Supply frequency, f- 50 Hz Assume efficiency, 90%arrow_forward
- Q29. A 800 kVA transformer has a primary winding resistance of 0.8Ω and a secondary winding resistance of 0.003 Ω. The iron loss is 2.8 kW and the primary and secondary voltages are 4.5kV and 310V respectively. If the power factor of the load is 0.84 determine the efficiency of the transformer for full loadarrow_forwardII.) The number of turns on the primary and secondary windings of a single-phase transformer are 350 and 38 respectively. If the primary winding is connected to a 2.2 kV, 50-Hz supply, determine (a) the secondary voltage on no-load, (b) the primary current when the secondary current is 200A at 0.8 p.f. lagging, if the no-load current is 5 A at 0.2 p.f. lagging, (c) the power factor of the primary current. [239 V; 25-65 A; 0.715 lag]arrow_forwardThe appropriate DB for 1000KVA transformer is?arrow_forward
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