Set 25GEECKEY C. RajoThe following information is given in connection with test performed on a120 Kva 8600/240 volt 70 cycle transformer:Name:Open circuit test..... 240 volts; Poc=295 wattsShort circuit test.... 185 volts; Psc= 655 watts; Isc 13.95349 amps1. Calculate the percent efficiency when the transformer is delivering rated kva at a power factor .8591Answer: 44,5%2. Calculate the percent efficiency when the load is 125 Kva at a power factor of .8764Answer: 9-20%3. Calculate the percent efficiency when the load is 77.5519 Kw at a power factor of .6863Answer: 76.98%4. Calculate the Kva load at a power factor of .5462 when the efficiency is a maximum, and the maximumefficiency?Answer: 7.5%5. If the eddy current loss is 30% of the core loss, calculate its core loss if the transformer is connected to a sourceof 6880 volts 70 cycle.Answer:201.14W6. If thereddy current loss is 30% of the core loss, calculate its core loss if the transformer is connected to a sourceof 8600 volts 60 cycle.Answer:369.5767. If the eddy current loss is 30% of the core loss, calculate its core loss if the transformer is connected to a sourceof 6880 volts 60 cycle.Answer:263.3508. If the transformer operates with the following loads during the 24 hr period:1.5 times rated Kva, power factor - 0.8, 1 hr; 1.25 times rated Kva, power factor-0.8, 2 hr; rated Kva, power factor1.0, 3 hr; 1/2 rated Kva, power factor 1, 6 hr.; 1/4 rated Kva, power factor 1, 8 hr; no load 4 hr. calculate the all-day efficiencyAnswer:99.4%Solution1.) 120 kva8600/2400TO CYCLECopin = 240V i POK= 295NCSPORT = 185 √ iP₁²= 655 W₁lcc = 13.95349% E = ?Isc "R₁ = Pc% E = (1 - WATTI LONCESWATTS OUT TUT + WATTS LOCKETKvane = KUAY PCPCC=)= 120 1295X 100

As per the guidelines of Bartleby we suppose to answer first three subpart only for solution of…

Set 25 Name: GEECKEY C. ROJO The following information is given in connection with test performed on a 120 Kva 8600/240 volt 70 cycle transformer: Open circuit test..... 240 volts; Poc=295 watts Short circuit test.... 185 volts; Psc= 655 watts; Isc 13.95349 amps 1. Calculate the percent efficiency when the transformer is delivering rated kva at a power factor of 8591 Answer: 44.5% 2. Calculate the percent efficiency when the load is 125 Kva at a power factor of .8764 Answer: 94.20% 3. Calculate the percent efficiency when the load is 77.5519 Kw at a power factor of .6863 Answer: 26.58%

Set 25 Name: GEECKEY C. ROJO The following information is given in connection with test performed on a 120 Kva 8600/240 volt 70 cycle transformer: Open circuit test..... 240 volts; Poc=295 watts Short circuit test.... 185 volts; Psc= 655 watts; Isc 13.95349 amps 1. Calculate the percent efficiency when the transformer is delivering rated kva at a power factor of 8591 Answer: 44.5% 2. Calculate the percent efficiency when the load is 125 Kva at a power factor of .8764 Answer: 94.20% 3. Calculate the percent efficiency when the load is 77.5519 Kw at a power factor of .6863 Answer: 26.58%

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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