15-09-2008, 09:42 AM
DarrenW Wrote:I have attempted the calculations for the a.c. track circuit question from the 2000 Module 5 paper. Would somebody in the know be able to have a look over it for me please? I'm certain that I'm on the right lines, but have done it from memory without digging the old uni folders out.
I'm not an ac tracks expert, but your approach is exactly what I would have done. Your electrical analysis is sound and your calculations good and it is presented quite clearly.
There is one point that I think you might like to look at. You have calculated 8.77uF which you note needs to be rounded to 8 or 9. Having selected 8, what does that do to the voltage?
Based on your the first part, see what you make of the next part calculating the value of the train shunt with the capacitor.
Peter