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2) Determine the maximum voltage across the breaker and the maximum transient current after it opens, disconnecting the system's short-circuit fault, as shown in Fig. 1. The system is fed by an underground cable, through reactor (whose purpose is to reduce the short-circuit current). The parameters of the reactor and the cable are L, = 6.13 mH, R = 0.2 2/km, L = 0.318 mH/km and C = 0.267 µF/km. The system voltage is 10 kV (rms) at 60 Hz and the fault occurs at 13.5 km from the sending end. Suppose the arc, which appears at the first moment of switching, is extinguished at current zero value. Note: Assume that supply voltage is of the form vs(t) = Vsv2 cos(wt) reactor Cable 13.5 km R

2) Determine the maximum voltage across the breaker and the maximum transient current after it opens, disconnecting the system's short-circuit fault, as shown in Fig. 1. The system is fed by an underground cable, through reactor (whose purpose is to reduce the short-circuit current). The parameters of the reactor and the cable are L, = 6.13 mH, R = 0.2 2/km, L = 0.318 mH/km and C = 0.267 µF/km. The system voltage is 10 kV (rms) at 60 Hz and the fault occurs at 13.5 km from the sending end. Suppose the arc, which appears at the first moment of switching, is extinguished at current zero value. Note: Assume that supply voltage is of the form vs(t) = Vsv2 cos(wt) reactor Cable 13.5 km R

Introductory Circuit Analysis (13th Edition)
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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2) Determine the maximum voltage across the breaker and the maximum transient current after it opens, disconnecting the system's short-circuit fault, as shown in Fig. 1. The system is fed by an underground cable, through reactor (whose purpose is to reduce the short-circuit current). The parameters of the reactor and the cable are L, C = 0.267 µF/km. The system voltage is 10 kV (rms) at 60 Hz and the fault occurs at 13.5 km from the sending end. Suppose the are, which appears at the first moment of switching, is extinguished at current zero value. 6.13 mH, R = 0.2 2/km, L = 0.318 mH/km and %3| Note: Assume that supply voltage is of the form vs(t) = Vsv2 cos(wt) reactor Cable 13.5 km L, R + Figure 1: Problem 2
Transcribed Image Text:2) Determine the maximum voltage across the breaker and the maximum transient current after it opens, disconnecting the system's short-circuit fault, as shown in Fig. 1. The system is fed by an underground cable, through reactor (whose purpose is to reduce the short-circuit current). The parameters of the reactor and the cable are L, C = 0.267 µF/km. The system voltage is 10 kV (rms) at 60 Hz and the fault occurs at 13.5 km from the sending end. Suppose the are, which appears at the first moment of switching, is extinguished at current zero value. 6.13 mH, R = 0.2 2/km, L = 0.318 mH/km and %3| Note: Assume that supply voltage is of the form vs(t) = Vsv2 cos(wt) reactor Cable 13.5 km L, R + Figure 1: Problem 2
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