4 अल्टरनेटर, जो कि प्रत्येक 5 MVA, 11 kV के साथ 20% रियेक्टेंस पर निर्धारित हैं, समांतर कार्य कर रहे हैं। बस - बार का शॉर्ट सर्किट लेवल होगा -

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RSMSSB JE Electrical Engineering (Degree) 19 May 2022 Official Paper
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  1. 6.25 MVA
  2. 20 MVA
  3. 25 MVA
  4. 100 MVA

Answer (Detailed Solution Below)

Option 4 : 100 MVA
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संकल्पना:

शॉर्ट-सर्किट MVA निम्न द्वारा दिया गया है:

SCMVA = \( {1\over X_{eq}}\times(MVA)_{base}\)

गणना:

दिया गया है, (MVA)आधार = 5 MVA

Xeq = \(20\over 4\) = 5% = 0.05 pu

SCMVA = \( {1\over 0.05}\times5\)

SCMVA = 100 MVA

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