6- A 100KVA, 1000/10000V, SOHZ transformer has an iron loss of 1200w. the copper loss with 6A in the high-voltage winding is 50ow. calculate the efficiencies at i) 25%; a) 50% and i) 100% of normal load for power factors a/1.0 and b/ 0.8, the output terminals voltage being maintained at 10000v. find also the load for maximum efficiency at both power factors. [a/ i) 95.100%; i) 97.000% ili) 97.470%, 93KVA b/i) 93.950% i) 96.270% il) 96.860% ; 93KVA

6- A 100KVA, 1000/10000V, SOHZ transformer has an iron loss of 1200w. the copper loss with 6A in the high-voltage winding is 50ow. calculate the efficiencies at i) 25%; a) 50% and i) 100% of normal load for power factors a/1.0 and b/ 0.8, the output terminals voltage being maintained at 10000v. find also the load for maximum efficiency at both power factors. [a/ i) 95.100%; i) 97.000% ili) 97.470%, 93KVA b/i) 93.950% i) 96.270% il) 96.860% ; 93KVA

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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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

6- A 100KVA, 1000/10000v, SOHZ transformer has an iron loss of 1200w. the copper
loss with 6A in the high-voltage winding is 50ow. calculate the efficiencies at i) 25%;
i) 50% and i) 100% of normal load for power factors a/1.0 and b/ 0.8, the output
terminals voltage being maintained at 10000v. find also the load for maximum
efficiency at both power factors.
[a/ 1) 95.100%; i) 97.000% i) 97.470%, 93KVA
b/ i) 93.950% i) 96.270% il) 96.860% ; 93KVA

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