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for distribution line ratio of x/r
1.<0.1 2.>10 3.>1 4.<0.01
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Answer Posted / shantanu mishra
x/r ratio is the ratio of reatance of the line and
resistance of the line. In distribution lines like 400 volt
three phase line, the resitance is far high than reactance
or we can say the reactance is negligible as compared to R.
Therefore x/r ratio of dist.line is less than 0.01. for
11kv line this may be less than 0.1.
THis ratio increases as we move towards high and Exta high
votage lines.
| Is This Answer Correct ? | 29 Yes | 8 No |
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Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.
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