The shown distribution network is to supply two factories A & B with load curves indicated. Assume that both factories have a lagging power factor of 0.8. a) Select the required sizes of transformers for both factories such that in the case of a failure in one transformer the overload on the remaining ones should not exceed 15%. b) Select the required sizes of fuses to be installed at both sides of transformers. c) Calculate the annual energy losses in transformers of factory A. Assuming that transformers are in operation continuously.

The shown distribution network is to supply two factories A & B with load curves indicated. Assume that both factories have a lagging power factor of 0.8. a) Select the required sizes of transformers for both factories such that in the case of a failure in one transformer the overload on the remaining ones should not exceed 15%. b) Select the required sizes of fuses to be installed at both sides of transformers. c) Calculate the annual energy losses in transformers of factory A. Assuming that transformers are in operation continuously.

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

1) A Power Distribution System starts at the Substation. Select one: True False 2) The shape of the conductor sag in a span is a semi-circle. Select one: True False 3) What type of Transformers are used in Power Plants or Stations? A.STEP-DOWN TRANSFORMERS B.AUTOTRANSFORMERS C.ISOLATING TRANSFORMERS D.STEP-UP TRANSFORMERS
Given two distribution transformers TR1 (ST1 = 400KVA) and TR2 (ST2 = 600KVA) connected in parallel as shown in the following figure. %Z1=2% ST1 Zeq1 SL1 SL2 Load Zeq2 SLmax=?? KVA ST2 %Z2=3% PF=0.8 lag 1) Assuming that maximum loading of each transformer is 90% and that TR1 is loaded first, calculate the loading SL1 and SL2 on TR1 and TR2 respectively then calculate the maximum loading of the combination (TR1//TR2) SLmax. 2) Discuss the case when TR2 is loaded first. Vin
Single phase 10 kVA, 480 V / 120 V to feed a 120 V load from a 600 V source conventional transformer will be used. a. Draw the transformer connection that can do this job. b. In the connection you have drawn, the apparent power of the transformer (in rated operation state, the load power to be transferred) what happened. c. Calculate the maximum primary and secondary winding currents for the connection situation you have drawn.
??
Two transformers A and B of different ratings but equal voltage ratios share a load of 900 kVA at 0.8 power factor lagging at 400 V by operating in parallel. Transformer A has a rating of 600 kVA, resistive drop of 1% and reactance drop 5%. Transformer B has a rating of 300 kVA, resistive drop of 1.5% and reactance drop of 4%. Calculate the load shared by each transformer and the power factor at which it is working.
i need the answer quickly
BListen Tron Joss in a transformer: Cais dependent on load current. b) is a function of the resistance of the primary and the secondary windings. Cis a function of eddy currents and hysteresis effects in the transformer core. d) ) can be reduced by ¼ by reducing the current by 2.
a)Why are transformers generally connected in parallel at a substation?b)What conditions must be met for two transformers to be paralleled?c)Draw the phase relationship and connection diagram for Dd0 connection andYy6
3 In a Ideal transformer (assuming no losses), the no load current I0 is in phase with the magnetic flux. Select one: True False
Only detailed descriptionand and complete answer is required.
What are the reasons for using transformer oil in power transformers and why are mineral oils preferred over vegetable oils?
Two 7970-V:230-V single-phase transformers with impedance with respect to their secondaries of 1.5 + j3 and 2 + j4.5 ohms are connected in parallel to a 7900-V source. Their secondaries are supplying a common load of 30 + j40 ohms. A. What is the magnitude of the voltage across the load in volts? (2 decimal places) B. What is the magnitude of the total current supplied by the 7900-V source in amperes? (3 decimal places) C. What is the efficiency of the parallel transformers combined in percent? ( 1 decimal place)