Answered: Industrial Plant IA CBA VL = 7.97 kV PT…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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An industrial plant is supplied by a power utility company with voltage of 7.97 kV. To monitor the plant’s performance and consumption, the utility company installed a potential transformer (PT) and a current transformer (CT) at the plant’s premises. The specs of the transformers are as shown on Fig. 1. If V , negative sequence (that is V, V) , and plant is drawing 2000 kW at 0.90 pf lagging, find the following:
1.Assuming the load is Y-connected, what is the voltage V_AN in volts? Enter magnitude only in 2 decimal place.

Industrial
Plant
IA
CBA
VL = 7.97 kV
PT
CT
1 ΚΩ
250 ΜΩ
PT Specs:
7970-V:120-V, 60 Hz
X₁ 1721 02, R₁ = 1378 2, X 782 k
X₂ = 1897 02, R₂ = 1602 2 (referred to its primary)
CT Specs:
200-A:5-A, 60 Hz
X, = 745 μΩ, R, = 136 μΩ, Χ = 307 ΜΩ
X'₂ = 813 μ2, R'₂-128 μn (referred to its primary)

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