Railway phase-earth short-circuit
Railway phase-earth short-circuit
(OP)
Hello,
I am designing the grounding grid for high-speed railway substations and autotransformers (-27,5 kV and +27,5 kV) and I have not been able to find any good references for short-circuit calculations. I need to calculate the phase to earth short-circuit both in substations and in autotransformers, and also the part of that fault which returns.
Could anyone provide me references for this type of calculations, please?
Thanks.
I am designing the grounding grid for high-speed railway substations and autotransformers (-27,5 kV and +27,5 kV) and I have not been able to find any good references for short-circuit calculations. I need to calculate the phase to earth short-circuit both in substations and in autotransformers, and also the part of that fault which returns.
Could anyone provide me references for this type of calculations, please?
Thanks.






RE: Railway phase-earth short-circuit
ftp://ftp.areva-td.com/NPAG/Chap20-352-369.pdf
Regards
Marmite
RE: Railway phase-earth short-circuit
Regards
Marmite
RE: Railway phase-earth short-circuit
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It may be like this in theory and practice, but in real life it is completely different.
The favourite sentence of my army sergeant
RE: Railway phase-earth short-circuit
I already read AREVA guide before asking. A good reference mainly for protection issues. But it was not very helpful with short-circuit calculation.
RE: Railway phase-earth short-circuit
In EN 50122-1 there is data for the rail conductivity: from 0,4 Siemens/km to 1,7 Siemens/km. When calculating the different return paths of a ground fault, how can be determined the part which returns from the rails? How much distance must be considered?