3) The resistances and leakage reactances of a 40-kVA 60-Hz 7.97-kV-V:240-V single-phasedistribution transformer areR₁ = 41.6 22 R₂ = 37.2 m2X = 42.1 Ω _ X = 39.8 mΩwhere subscript 1 denotes the 7.97-kV winding and subscript 2 denotes the240-V winding. Each quantity is referred to its own side of the transformer.a. Draw the equivalent circuit referred to (1) the high- and (11) the low-voltage sides. Label theimpedances numerically.b. Consider the transformer to deliver its rated kVA to a load on the low-voltage side with 240V across the load. (1) Find the high-side terminal voltage for a load power factor of 0.87 powerfactor lagging. (ii) Find the high-side terminal voltage for a load power factor of 0.87 powerfactor leading.

Given, The primary resistance, R1=41.6 Ω The primary reactance, X1=42.1 Ω The secondary resistance,…

3) The resistances and leakage reactances of a 40-kVA 60-Hz 7.97-kV-V:240-V single-phase distribution transformer are R₁ = 41.622 R₂ = 37.2 m2 X = 42,1 Ω _ X = 39.8 mΩ where subscript 1 denotes the 7.97-kV winding and subscript 2 denotes the 240-V winding. Each quantity is referred to its own side of the transformer. a. Draw the equivalent circuit referred to (1) the high- and (ii) the low-voltage sides. Label the impedances numerically. b. Consider the transformer to deliver its rated kVA to a load on the low-voltage side with 240 V across the load. (1) Find the high-side terminal voltage for a load power factor of 0.87 power factor lagging. (11) Find the high-side terminal voltage for a load power factor of 0.87 power factor leading.

3) The resistances and leakage reactances of a 40-kVA 60-Hz 7.97-kV-V:240-V single-phase distribution transformer are R₁ = 41.622 R₂ = 37.2 m2 X = 42,1 Ω _ X = 39.8 mΩ where subscript 1 denotes the 7.97-kV winding and subscript 2 denotes the 240-V winding. Each quantity is referred to its own side of the transformer. a. Draw the equivalent circuit referred to (1) the high- and (ii) the low-voltage sides. Label the impedances numerically. b. Consider the transformer to deliver its rated kVA to a load on the low-voltage side with 240 V across the load. (1) Find the high-side terminal voltage for a load power factor of 0.87 power factor lagging. (11) Find the high-side terminal voltage for a load power factor of 0.87 power factor leading.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

3. A non-ideal 1-phase transformer has turns ratio 5:1 with 120Vac primary. The primary impedance is 1 + j1 Ohms, and the secondary impedance is 0.2 + j0.2 Ohms. Assume the core impedance (R0 and X0) can be neglected. A resistive load of 12 Ohms is connected to the secondary. What is the primary current magnitude? What is the secondary voltage magnitude? What is the efficiency of this transformer with this load?
WILL SURELY GIVE AN UPVOTETOPIC: AC MACHINE INSTRUCTIONS Please write clearly and understandable wayWrite all the corresponding Given with their corresponding symbols and unitsSolve in step-by-step, no shortcut (I need to learn as a beginner)Underline twice the Final Answer PROBLEM:A single-phase transformer has a voltage ratio on open-circuit of 3300/660-V. The primary and secondary resistances are 0.82 and 0.03 respectively, the corresponding leakage reactance being 4 2 and 0.12 0. The load is equivalent to a coil of resistance 4.8Q and inductive reactance 3.60. Determine the output of the transformer in kW.a. 54b. 108c. 63d. 27
What do the connection angles and groups show in transformers? For example, where are the Yy0 , Dy5 ,Yd5, Yz5 group transformers used?
Two transformers are to be operated in parallel such that they share load in proportion to their KVA rating. The rating of the first transformer is 500 kVA and its pu leakage impedance is 0.05 pu. If the rating of second transformer is 250 kVA, then its pu leakage impedance is A 0.20 B 0.10 C 0.05 D 0.025
A conventional phase transformer given in the figure will be connected as an autotransformer in two different ways. Each For a connection, find the input and output powers by drawing the connection. a) Connection of 1220 / 220V autotransformer b) 1000 / 1220V autotransformer connection
Two single-phase transformers, having equal turns ratio, in parallel supply a secondary load of 1,000 A at 0.8 pf lagging. For each transformer the secondary emf on open circuit is 3,300 V and their total leakage impedances referred to secondary are (0.10 + j0.20) ohms and (0.05 + j0.040) ohm, respectively. Determine the output current on each transformer.
X₂=0.1 1 XL +03 Soto X₁ = 0.2 X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. b) Find the bus voltages and line currents during the fault. 2 O oto
Ql-phase step down transformer 1250 KVA, 11000/2200 V, 50 Hz . The resistance /phase and leakage reactance/phase of the primary winding are 0.78 N and 4.80 and the corresponding values for the secondary winding are 0.012 and 0.062 respectively if the primary winding is connected in delta and secondary in star calculate: i)The voltage to be applied at normal frequency to the primary to circulate full-load through it when the secondary is short-circuited Ii) The full load copper loss
Q/A single-phase transformer with a capacity of 100 kVA and a voltage of 2000/400 and the equivalent circuit elements are: As follows R1 = 0.1 02 x1 = 0.2 2 R2 = 0.25 2 X2 = 0.75 2 RO = 500 XO = 150 Q and feeds a load of 90 kVA at a voltage of 2000 volts and a power factor of 8.0 in delay. Calculate voltage and current Primary Royl ww JX eql
4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLs-0.008Ω RHs-2.6Ω Ri-HS-500 0Ω XLS-0.015Ω XHs=5.22 Xm,HS=88002 Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor. Determine the following: a) The equivalent impedance of the transformer referred to primary. b) Input impedance of the combined transformer and load. c) Actual input voltage at HV side. d) Input impedance if load is disconnected. e) Exciting current at no load.