2005 Track circuit calculations - Printable Version +- IRSE Exam Forum (https://irseexam.co.uk) +-- Forum: MODULES (https://irseexam.co.uk/forumdisplay.php?fid=3) +--- Forum: Module 5 (https://irseexam.co.uk/forumdisplay.php?fid=8) +---- Forum: TC Calcs (https://irseexam.co.uk/forumdisplay.php?fid=61) +---- Thread: 2005 Track circuit calculations (/showthread.php?tid=462) |
2005 Track circuit calculations - PJW - 05-07-2010 As per Indian Practice: (1) With optimum feed voltage and maximum ballast resistance of the track, its relay voltage:- (a) When the minimum permissible shunt resistance is connected across, shall not be more than 85% of its drop away value; (b) Without a shunt across, shall not be more than 250% of its pick up value, and (2) With normal feed source voltage and minimum permissible ballast resistance of the track, its relay voltage shall not be less than 125% of its pick up value. Above values are matching with uk practice? Please clarify ======================================================================= See attachments for an attempt and the feedback on that. RE: 2005 Track circuit calculations - dorothy.pipet - 30-11-2015 FYI |