Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators
Short Circuit Ratio and Its Significance
Synchronous Generator or Alternators
Mathematically, SCR (short circuit ratio) = If for rated open circuit voltage / If for rated short circuit current
Short Circuit Ratio and Its Significance
The
short circuit ratio is the ratio of the excitation required to produce open
circuit voltage equal to the rated voltage to the excitation required to
produce rated full load current under short circuit.
Mathematically,
SCR (short circuit ratio) = If
for rated open circuit voltage / If for rated short circuit current
From
open and short circuit test it is known that,
The
per unit value of Xs is given by,
Key Point : Thus the short
circuit ratio and X5 are inversely proportional to each other.
Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators : Tag: Engineering Electrical Machines - II : Synchronous Generator or Alternators - Short Circuit Ratio and Its Significance
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Related Subjects
Electrical Machines II
EE3405 Machine 2 EM 2 4th Semester EEE Dept | 2021 Regulation | 4th Semester EEE Dept 2021 Regulation