The figure below shows the per-phase Open Circuit Characteristics (measured in V) and Short Circuit Characteristics (measured in A) of a 14 kVA, 400 V, 50 Hz, 4-pole, 3-phase, delta connected alternator, driven at 1500 rpm. The field current, If is measured in A.Readings taken are marked as respective (x, y) coordinates in the figure. Ratio of the unsaturated and saturated synchronous impedances (Zs(unsat)/Zs(sat)) of the alternator is closest toa)1.000b)2.100c)2.000d)2.025Correct answer is option 'D'. Can you explain this answer?

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The figure below shows the per-phase Open Circuit Characteristics (measured in V) and Short Circuit Characteristics (measured in A) of a 14 kVA, 400 V, 50 Hz, 4-pole, 3-phase, delta connected alternator, driven at 1500 rpm. The field current, If is measured in A.
Readings taken are marked as respective (x, y) coordinates in the figure. Ratio of the unsaturated and saturated synchronous impedances (Z_s(unsat)/Z_s(sat)) of the alternator is closest to

a)
1.000
b)
2.100
c)
2.000
d)
2.025

Correct answer is option 'D'. Can you explain this answer?

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The figure below shows the per-phase Open Circuit Characteristics (mea...

At 400 V,
I_f =8 A
So, air gap line equation will be like,
y = mx + C
y = 100x + 10 ...(i)

at I_f = 8 A,
Unsaturated voltage = 100 × 8 + 10 = 810

...(ii)
and

...(iii)
From equation (ii) and (iii),

Note: As, (0,10), (1, 110) and (2, 210) are colinear so, air gap line is an shown in figure.
∗ Data given is not realistic because at V_(residual), I_(SC) should have some non-zero value.

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The figure below shows the per-phase Open Circuit Characteristics (measured in V) and Short Circuit Characteristics (measured in A) of a 14 kVA, 400 V, 50 Hz, 4-pole, 3-phase, delta connected alternator, driven at 1500 rpm. The field current, If is measured in A.Readings taken are marked as respective (x, y) coordinates in the figure. Ratio of the unsaturated and saturated synchronous impedances (Zs(unsat)/Zs(sat)) of the alternator is closest toa)1.000b)2.100c)2.000d)2.025Correct answer is option 'D'. Can you explain this answer?

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The figure below shows the per-phase Open Circuit Characteristics (measured in V) and Short Circuit Characteristics (measured in A) of a 14 kVA, 400 V, 50 Hz, 4-pole, 3-phase, delta connected alternator, driven at 1500 rpm. The field current, If is measured in A.Readings taken are marked as respective (x, y) coordinates in the figure. Ratio of the unsaturated and saturated synchronous impedances (Zs(unsat)/Zs(sat)) of the alternator is closest toa)1.000b)2.100c)2.000d)2.025Correct answer is option 'D'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The figure below shows the per-phase Open Circuit Characteristics (measured in V) and Short Circuit Characteristics (measured in A) of a 14 kVA, 400 V, 50 Hz, 4-pole, 3-phase, delta connected alternator, driven at 1500 rpm. The field current, If is measured in A.Readings taken are marked as respective (x, y) coordinates in the figure. Ratio of the unsaturated and saturated synchronous impedances (Zs(unsat)/Zs(sat)) of the alternator is closest toa)1.000b)2.100c)2.000d)2.025Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The figure below shows the per-phase Open Circuit Characteristics (measured in V) and Short Circuit Characteristics (measured in A) of a 14 kVA, 400 V, 50 Hz, 4-pole, 3-phase, delta connected alternator, driven at 1500 rpm. The field current, If is measured in A.Readings taken are marked as respective (x, y) coordinates in the figure. Ratio of the unsaturated and saturated synchronous impedances (Zs(unsat)/Zs(sat)) of the alternator is closest toa)1.000b)2.100c)2.000d)2.025Correct answer is option 'D'. Can you explain this answer?.

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