7/21/2019 Maintenance Instructions on DC Track Circuit (Non RE
Area).pdf
1/2
Maharajpur, Gwalior
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7/21/2019 Maintenance Instructions on DC Track Circuit (Non RE
Area).pdf
2/2
Maharajpur, Gwalior
Maintain better drainage for
better ballast resistance.
Check proper packing up to 3
sleepers either side improves thereliability of insulation
joint.
Check 50mm clearance
between ballast and bottom
of the rail.
Check for missing worn out
liners and rubber pads in
concrete sleepers.
Preferred Glued joint over nylon
insulation joint.
Cut burr at the rail table at
insulation joint.
Check jumper connections in
TLJB weekly. Check track leads at feed end
and relay end weekly. Ensure that series track
circuit connections.
Train shunt resistance value should not be less than 0.15 ohm
for AC track circuit and 0.5 ohm
for DC track circuit and 0.25 ohm provided with concrete
sleepers.
Ballast resistance should not be less than 2 ohm per km in any
section irrespective of sleeper
provided.
Rail resistance should not be more than 1 ohm per km
irrespective of length of track circuit.
Voltage on track relay should be checked weekly.
Signal & Telecommunication Directorate, IRCAMTECH,
Gwalior
Series
Connection
TR voltage should not be more than 300% of
its pick up value as written on the relays
Battery charger, charging current and sp.gr.
of track battery shall be checked weekly.
Fish plate holes /rail holes should not be in staggered way for
smooth alignment to replace/
install nylon bushes.
Check the resistance between fish plate-rail, fish plate bolt,
fish plate-fish plate weekly.
Burr
50 mm
Drainage
