Page 389 - IRSEM_Main Book

17.3.2 DC Track Relays

(a) Pick up and drop away values shall be maintained within the limits
specified by the manufacturer.

(b) Track relays shall be inspected visually every quarterly by the JE/SSE and
the following visual checks conducted:

(i) Movement of armature and contact carriage

(ii) Wiping of contacts

(iii) Arcing of contacts, if any

(iv) Pitting or charring of contacts

(v) Dust on contacts

(vi) Electroplating

(vii) Corrosion, rusting of components

(viii) Cracks or breakage in components

(ix) Presence of fungus, if any

(x) Charring of cover near contacts (for plug-in relays)

(xi) Correctness of label

(xii) Presence of seal

(c) The defective track relay should be immediately replaced and a brief report
stating the nature of the defects shall be submitted to ASTE/DSTE/ Sr.DSTE.
On no account should any attempt be made by the field staff to rectify the
relay.

(d) Plug in type track relays have to be replaced on completion of 12 years or
earlier if warranted by the actual condition of the relay and/or its usage.

17.3.3 Insulated Rail Joints (IRJ): Insulated Rail Joints shall be maintained in
accordance with the instructions given in Booklet No. STS/E/IRJ/IMI "Installation
and Maintenance Instructions for Nylon Insulated Rail Joint" issued by the
RDSO/Lucknow, with particular attention being paid to the following:

(a) Before opening an insulated rail joint, the components required for
replacement, conforming to the rail section, shall be kept ready by the side
of the track.

(b) For replacement of an end-post when there is no gap at the Insulated Rail
Joint, loosen the rail fastening and pull back the rail and insert end-post
between the rail ends.

(c) It is imperative that when an insulated rail joint is provided at least three
sleepers on either side of the insulated rail joint shall be packed properly.

Chapter 17: Train Detection Track Circuits & Axle Counters Page 337 of 535