1 A 2,400/2,200 V autotransformer delivers a load of 90.5 kW at a power factor of 0.75. Calculate the current in each winding section and the kVA rating of the transformer. 2 Two transformers connected in open delta supply a 400-kw balanced load operating at 0.866 p.f. (lag). The load voltage is 440 V. What is (a) the kVA supplied by each transformer? (b) the kW supplied by each transformer? 3 In a short circuit test on a circuit breaker, the following readings were obtained on single frequency transient : a. time to reach the peak re-striking voltage = 50 μsec b. the peak re-striking voltage = 100 kV Determine the average RRRV and frequency of oscillations

1 A 2,400/2,200 V autotransformer delivers a load of 90.5 kW at a power factor of 0.75. Calculate the current in each winding section and the kVA rating of the transformer. 2 Two transformers connected in open delta supply a 400-kw balanced load operating at 0.866 p.f. (lag). The load voltage is 440 V. What is (a) the kVA supplied by each transformer? (b) the kW supplied by each transformer? 3 In a short circuit test on a circuit breaker, the following readings were obtained on single frequency transient : a. time to reach the peak re-striking voltage = 50 μsec b. the peak re-striking voltage = 100 kV Determine the average RRRV and frequency of oscillations

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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