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B) Develop an expression, in terms of the generated e.m.f. and the sequence impedances (ZI, Z2 and Z0), for the fault current when an earth fault occurs on phase (A) of a three-phase generator, with an carthed star point. Show also that the voltage to carth of the sound phase (B) at the point of fault is given by: -N3E,(Z,-aZ,) Z, +Z, + Z, where a is the 120 operator.

B) Develop an expression, in terms of the generated e.m.f. and the sequence impedances (ZI, Z2 and Z0), for the fault current when an earth fault occurs on phase (A) of a three-phase generator, with an carthed star point. Show also that the voltage to carth of the sound phase (B) at the point of fault is given by: -N3E,(Z,-aZ,) Z, +Z, + Z, where a is the 120 operator.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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B) Develop an expression, in terms of the generated e.m.f. and the sequence impedances (Z1, Z2 and Z0), for the fault current when an earth fault occurs on phase (A) of a three-phase generator, with an earthed star point. Show also that the voltage to earth of the sound phase (B) at the point of fault is given by: - N3E, (Z,-aZ,) Z, + Z, +Z. V = where a is the 120 operator.
Transcribed Image Text:B) Develop an expression, in terms of the generated e.m.f. and the sequence impedances (Z1, Z2 and Z0), for the fault current when an earth fault occurs on phase (A) of a three-phase generator, with an earthed star point. Show also that the voltage to earth of the sound phase (B) at the point of fault is given by: - N3E, (Z,-aZ,) Z, + Z, +Z. V = where a is the 120 operator.
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