Page 391 - IRSEM_Main Book

17.3.7 Ballast: Minimum ballast resistance of track should not be less than 2 ohms
per km in station yard and 4 ohms per km in the block section.

Note: Wherever PSC Sleepers are used, availability of insulated liners upto a minimum
level of 97% shall be ensured.

17.3.8 Drainage

(a) Special attention shall be paid during the rains to track drainage. Defects,
if any, shall be reported to the SSE/JE(P-Way).

(b) All cases of defective valves of overhead water pipes in track circuited
area shall be reported to the Inspector of works SSE/JE(Works).

17.3.9 Joint Inspection of Track by S&T and Permanent Way Inspector

(a) The track circuited portion of the track shall be jointly inspected by SSE
(Signal)/incharge and SSE(P-way)/incharge and jointly by Sectional SSE/JE
(Signal) & SSE/JE (P-way) at least once in six months.

(b) This is in addition to routine inspections to be carried out by each Branch.
The condition of rail and insulation at the rail joints, ballast and sleepers,
abnormal collection of brake dust, rusting of the rail and drainage system
of the yard shall be particularly noted, it shall be ensured that percentage
of missing liners for track circuit length not to exceed 3%. Maintenance
work found necessary on insulation joints after such inspection should be
carried out jointly.

17.3.10 Train Shunt

(a) A Train shunt test shall be taken every quarter and every time the track
circuit is adjusted or any alteration is made.

(b) Shunt test shall be taken not only at relay end but also at other parallel
portions of the track, such as, turnouts and crossovers.

17.3.11 Track Circuit Test Record Card

(a) Track circuit test record Card No.S&T/TC-1, Annexure: 17-MS1 for DC track
circuits, shall be maintained for each track circuit. For other types of track
circuits, suitable record card may be framed by the Principal Chief Signal
and Telecommunication Engineer. Readings shall be recorded every six
months. Suitable remedial action shall be taken when abnormal readings
are noticed at any time.

(b) Test cards shall be easily accessible for inspection by officials.

(c) The test card shall be kept up-to-date in accordance with the instructions
given on the cards.

17.3.12 Track Batteries/Track Feed Apparatus: Track batteries or the track feed
apparatus, where provided, shall be so arranged that the track relay will
operate under the most adverse conditions. Batteries shall be kept in good
fettle and special care shall be taken in maintenance of the cells.

Chapter 17: Train Detection Track Circuits & Axle Counters Page 339 of 535