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One transformer is rated at 400 KVA & has per unit impedance of (0.02 + j0.08) p.u. and other is rated at 800 KVA & has per unit impedance of (0.20 + j0.08) p.u. Both transformers are connected in parallel to the load. Find the maximum load (in KVA) that can be imposed to transformer’s such that no transformer is overloaded.
  • a)
    1197
  • b)
    1200
Correct answer is between '1197,1200'. Can you explain this answer?
Verified Answer
One transformer is rated at 400 KVA & has per unit impedance of (0.02...
The answer is in between 1197 and 1200
Let choose 800 KVA as base KVA.
NOTE: Transformer having the least p.u. impedance saturates first.
So, the max. load is shared when transformer T2 Share its rated load.
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Most Upvoted Answer
One transformer is rated at 400 KVA & has per unit impedance of (0.02...
This means that the transformer has a maximum power rating of 400,000 volt-amperes.
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One transformer is rated at 400 KVA & has per unit impedance of (0.02 + j0.08) p.u. and other is rated at 800 KVA & has per unit impedance of (0.20 + j0.08) p.u. Both transformers are connected in parallel to the load. Find the maximum load (in KVA) that can be imposed to transformer’s such that no transformer is overloaded.a)1197b)1200Correct answer is between '1197,1200'. Can you explain this answer?
Question Description
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