Which one of the following is the correct statement?
A. The armature current upon symmetrical 3-phase, short-circuit of a synchronous machine (armature resistance is negligible) constitutes q-axis current only.
B. The armature current upon symmetrical 3-phase short-circuit of a synchronous machine (armature resistance is negligible) constitutes d-axis current only.
C. The armature current upon symmetrical 3-phase short-circuit of a synchronous machine (armature resistance is negligible) has both d-axis and q-axis component.
D. Short circuit current cannot be divided into d- and q-axes components. [U.P.S.C. I.E.S. E.E.-II, 2007]
Answer:B
Which one of the following is the correct statement?
A. The armature current upon symmetrical 3-phase, short-circuit of a synchronous machine (armature resistance is negligible) constitutes q-axis current only. B. The armature current upon symmetrical 3-phase short-circuit of a synchronous machine (armature resistance is negligible) constitutes d-axis current only. C. The armature current upon symmetrical 3-phase short-circuit of a synchronous machine (armature resistance is negligible) has both d-axis and q-axis component. D. Short circuit current cannot be divided into d- and q-axes components. [U.P.S.C. I.E.S. E.E.-II, 2007]