Question 1 1. A transformer has a A connected primary and a star connected secondary, working on 50 Hz supply. The line voltages on primary and secondary sides are 6.6 KV and 400 V respectively. The line current on the primary side is 8 A and the secondary side has a balanced load of 0.6 p.f. lagging. Find (a) output of the transformer (b) the line current on the secondary side. (Ans. (a) 54.857 kW (b) 132 A) 2. A scott connected transformer set supplies two electric furnaces at 110 V each from a 3 phase, 4400 V system. If the furnace connected to teaser transformer secondary takes 270 kW and other one connected to main transformer secondary takes 450 kW at unity p.f.. find the line currents taken from the three phases mains. (Ans.: 108.2486 A, 108.2486 A, 70.9364 A) 3. Explain the choice of connection of 3 phase transformers. 4. What are instrument transformers? State its advantages and disadvantages. 5. Explain the working of current transformer. 6. Explain the construction and working of potential transformer. 7. Compare C.T. and P.T.

Question 1 1. A transformer has a A connected primary and a star connected secondary, working on 50 Hz supply. The line voltages on primary and secondary sides are 6.6 KV and 400 V respectively. The line current on the primary side is 8 A and the secondary side has a balanced load of 0.6 p.f. lagging. Find (a) output of the transformer (b) the line current on the secondary side. (Ans. (a) 54.857 kW (b) 132 A) 2. A scott connected transformer set supplies two electric furnaces at 110 V each from a 3 phase, 4400 V system. If the furnace connected to teaser transformer secondary takes 270 kW and other one connected to main transformer secondary takes 450 kW at unity p.f.. find the line currents taken from the three phases mains. (Ans.: 108.2486 A, 108.2486 A, 70.9364 A) 3. Explain the choice of connection of 3 phase transformers. 4. What are instrument transformers? State its advantages and disadvantages. 5. Explain the working of current transformer. 6. Explain the construction and working of potential transformer. 7. Compare C.T. and P.T.

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

Can you do it on a paper. Thank you
Mention the steps in treating an Unconscious Person who received LV Electric shock. (Please write by computer)
Which device is used to convert mechanical energy into electrical energy? Draw a neat diagram and label the parts of this device.
Solve it fast fast plz
PLEASE HELP ME CHOOSE WHAT CORRECT LETTER OR ANSWER 4. The induced voltage in a single loop reverses a. once each revolution. b. once each half-revolution. c. twice each half-revolution. d. twice each revolution. e. three times each revolution. 5. Maximum voltage is induced in a single loop when the sides of the loop are passing a. perpendicular to the lines of force. 6. b. parallel to the lines of force. c. not quite perpendicular to the lines of force. d. at a slow rate of speed. e. in front of the N pole face. When a commutator is used on a single loop, the voltage at the brushes has a a. very large magnitude. b. changing polarity. c. constant polarity. d. zero value. e. constant value. 7. The left-hand generator rule is typically used to determine a. conductor speed. b. rotational direction. c. field direction. d. current direction. e. magnetic field strength.
subject control system engineering
Please, can you please do more explanation on this question. Topic: Electrical Machines
What are the basic components of Hydroelectric Power Plant.
What technology choice is appropriate for the safe usage of power tools ?
As an electrician what should you bear in mind when you working with electric