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Protection Of Alternators

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sazxc | 08:44 Thu 27th Aug 2020 | Technology
7 Answers
A 10 MVA, 11 kV, 3-phase star-connected alternator is protected by the Merz-Price balance-current
system, which operates when the out-of-balance current exceeds 20% of full-load current. Determine
what portion of the alternating winding is unprotected if the star point is earthed through a resistance of
9 . The reactance of the alternator is 2 .
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Avatar Image TonyV
No idea, sorry don't help with homework.
08:50 Thu 27th Aug 2020
Avatar Image derekpara
Nor me, especially when so phrased.
09:55 Thu 27th Aug 2020
Avatar Image alavahalf
Until at
10:05 Thu 27th Aug 2020
Avatar Image alavahalf
Whoops
10:05 Thu 27th Aug 2020
Avatar Image HansUrbancka
Your question appears to be from a test for a Student of Electrical Engineering for which you are seeking someone to give you an answer.

Please correct me if I am wrong and kindly tell me why you are faced with the 'down to earth' problem.

Hans.
11:13 Thu 27th Aug 2020
Avatar Image bigbanana
Just maybe the OP needs to put his hand in his pocket. The question is listed verbatim on numerous student orientated websites but the answer in each case looks like it sits behind a pay wall!
16:21 Thu 27th Aug 2020
Avatar Image HansUrbancka
@bigbanana.... IMO...You are 100% correct.

I could mention a site that for $14.95 the answer would be revealed.
However, I refrain, if possible, from unauthorised advertising on Answerbank.

Hans.
16:46 Thu 27th Aug 2020

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