(b) A 2.89kV/230V single phase transformer used in a local distribution network has the equivalent circuit parameters shown in Table Q3b. Determine: (i) The transformer turns ratio. (ii) The secondary voltage, current and power (W) given a 10 2 resistive load. (iii) The efficiency and voltage regulation at this load. (iv) The load power when operating the transformer at maximum efficiency. The transformer primary current and power factor when operating under no load (open circuit) conditions. (v) hase e . - atonc 11 L T atina Parameter Value Units Re 46 10 Хм Rieg Xieq 78 200 Ω Table Q3b

(b) A 2.89kV/230V single phase transformer used in a local distribution network has the equivalent circuit parameters shown in Table Q3b. Determine: (i) The transformer turns ratio. (ii) The secondary voltage, current and power (W) given a 10 2 resistive load. (iii) The efficiency and voltage regulation at this load. (iv) The load power when operating the transformer at maximum efficiency. The transformer primary current and power factor when operating under no load (open circuit) conditions. (v) hase e . - atonc 11 L T atina Parameter Value Units Re 46 10 Хм Rieg Xieq 78 200 Ω Table Q3b

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...

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The figure below shows the equivalent circuit of a nominal 240V-120V, 1000 VA, single-phase transformer, having an actual (no-load) voltage ratio of 240V - 125V. Predict the results of the open circuit test (Voc, Ioc and Poc) and the short circuit test (Vsc, Isc, and Psc) given that: (i) the open circuit test will be done on the low voltage side at rated nominal conditions, and (ii) the short circuit test will be done on the high voltage side at rated nominal conditions. Show all work. Present your final answers in the table below as magnitudes only. 1.902 0.750 1000VA E, 240V-125V E Ep 2.1kn 1kn Short Circuit Test Open Circuit Test Voc Vsc Isc Ioc Psc Рос
A 200/400V, 50Hz, 1-ohm draws a current of 0.7A and power of 70W when rated voltage is applied to the LV side and HV side isleft open. It draws a current of 10A and consumes 80W power when a reduced voltage of 15V is applied to the HV side and LVterminals are short circuited. Determine the equivalent circuit parameters of the transformer.
(b) A 1000 VA, 230/115V transformer is to be determined. The open and short circuit tests were performed on the primary side of the transformer as the following data in Table Q3(b). (i) Find the equivalent circuit of this transformer referred to the low-voltage side of the transformer. (ii) Calculate the full load voltage regulation at 0.9 leading power factor.
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Construct the circuit in Figure 1 in the Circuit JS simulator. Note that the voltage source is given in RMS. Within Circuit JS while defining the max voltage of the voltage source include “rms” after the number to tell Circuit JS that this is a rms value. Also note that there are additional parameters when instantiating a transformer in Circuit JS. Leave these at the default values. Additionally, transformers may have problems simulating in Circuit JS. Answer the following: 1. From the simulation results, determine the power dissipated in R2 and compare to the expected value from the previous section.2. Change the transformer ratio (“Ratio” as a fraction when you “Edit…” the transformer component) to the value calculated in the previous section to provide maximum power transfer in R2. Note: In Circuit JS, Transformer Ratio = Primary/Secondary.3. Rerun the simulation, calculate the power dissipated in R2 and compare to the expected value from the previous section.4. Change the…
The label values of the single-phase transformer whose electrical equivalent circuit is given below are 20 kVA, 15400V / 240V, 50 Hz. This transformer Calculate what is required below. a. What is the value of the active power measured in the short circuit test? b. What is the value of the active power measured in the idle test? c. Voltage regulation was found to be 0.1% at 0.8 back power factor. Accordingly, using any method you want Find out how many kVA the transformer draws from the network (primary apparent power).
G1=2 G2=4 G3=2 G4=7 G5=2 G6=1 G7=2
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A transformer with a central tap was purchased that provides a voltage of 11Vac between the central tap and either of its ends. We want to make a regulated voltage source that is ± 12Vdc ... is it possible to make the source with the transformer you bought or need to go change it? What would you recommend?What are the minimum components that you must buy to make the voltage source? Just provide your view please