2004 Question 6 - Worked Example

[adikarina]

Here is the worked Track Circuit Calculation from the recent Walsall Module 5 Study Event.

Regards
Aditi

[SARVESH KUMAR]

Here is the worked Track Circuit Calculation from the recent Walsall Module 5 Study Event.

Regards
Aditi

thanks adit for this question, more information helpful in futre for me and i hope you co-operate to me in future

with regards
sarvesh kumar

[cmcvea]

Here is the worked Track Circuit Calculation from the recent Walsall Module 5 Study Event.

Regards
Aditi

thanks adit for this question, more information helpful in futre for me and i hope you co-operate to me in future

with regards
sarvesh kumar

with regards to drop shunt calculations , does the 65% not refer to the original PU as opposed to the recalculated reliable PU as the additional 10% was added to improve reliability to pick, would the increased value not intoduce unreliability to drop?

[Peter]

Here is a note from Aditi in reply which came in an e-mail because of a problem, replying to this thread due to the way the forum software appears to deal with percent signs! Even though they appear correctly in the quoted text, unless you enter them as their HTML code of & # 3 7 ; (without the spaces), it will reject your post. This applies to text you have quoted too.

The reason for putting the additional 10% for reliability is because the track feed voltage may vary a bit as the voltage on the signalling power distribution changes under conditions of different loadings and fluctuations of incoming supply.

If you remove the additional 10% to calculate Rs, then you get the following:-
id = 0.04*0.65 = 0.026A
Vrail1 = 0.026 * (9 + 8.5) = 0.455V
if1 = (5