2. A bolted short circuit occurs in the series R-L circuit of Figure I with V=18kV, f=50Hz,X=1092, R=1.092, and with maximum de offset. The circuit breaker opens 3 cycles after fault inception. Determine: (a) the rms ac fault current, (b) the rms "momentary" current at t=1.0 cycle, which passes through the breaker before it opens, (c) the rms asymmetrical fault current that the breaker interrupts. R mm i(t) e(t) = √2U sin(@t+a) t=0

2. A bolted short circuit occurs in the series R-L circuit of Figure I with V=18kV, f=50Hz,X=1092, R=1.092, and with maximum de offset. The circuit breaker opens 3 cycles after fault inception. Determine: (a) the rms ac fault current, (b) the rms "momentary" current at t=1.0 cycle, which passes through the breaker before it opens, (c) the rms asymmetrical fault current that the breaker interrupts. R mm i(t) e(t) = √2U sin(@t+a) t=0

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.16P

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Similar questions

A short circuit occurs in the series R-L circuit with V = 20 kV, X = 8 ohm, and R = 0.8 ohm. The circuit breaker opens 3 cycles after fault inception. Determine (a)the rms ac fault current(???), (b)the rms “momentary” current(????), at ?=0.5cycle, which passes through the breaker before it opens, and (c)the rms asymmetrical fault current that the breaker interrupts.
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