Page 542 - IRSEM_Main Book

22.8.9 Breakage of Catenary/Contact Wire
In the event of break of catenary/contact wire of the overhead electrical
equipment, the following precautions shall be taken for the safe working of the
signalling equipment:

(a) The Train Controller, on receipt of an advice of a break in Traction
Overhead Lines or confirmation of such an advice from the Traction Power
Controller, shall immediately advise by the quickest possible means, to all
the staff responsible for the maintenance and operation of the signalling
equipment of the section where the catenary/contact wire has broken.
(b) The staff responsible for the operation of the Signalling equipment of the
section shall immediately check whether the block and other signalling
equipment are working normally. If an abnormal working of any equipment
is noticed, its working shall be immediately suspended and necessary
action under the Rules shall be-taken.
(c) On receipt of this intimation, the staff responsible for the maintenance of
Signalling system of the section shall immediately proceed to the site and test
all circuits and allied equipment paying particular attention to the external
signalling gear to ensure that no damage to it has taken place. An authorised
representative of the Signal Department not below the rank of SSE (Signal)
shall submit Certificate that everything is working all right and send it to his
superiors along with a detailed test report as soon as possible.

22.8.10 2.2 KV Charging as an Anti-Theft Measure
(a) Guidelines for anti-theft charging pertaining to S&T works as prescribed in
Appendix VII of ACTM Vol-II Part II shall be followed.

(b) Besides, any specific works pertaining to specific section, the following
S&T work shall be completed before issue of certificate for 2.2 KV
charging.

(i) Replacement of existing DC track relays and DC line relays by AC
immunized relays.

(ii) Provisions of wire mesh screen on the working platform of existing
signals in case the requisite electrical working clearance of 2 meters is
not available. No portion of signal post or its fittings shall be less than
700 mm from the live conductor.
(iii) Supply of insulated tools to maintenance staff.
(iv) Conversions of all overhead track crossings of BSNL and Railway into
cables and removal of overhead wires thereof.
(v) Certificate of clearance from DOT regarding 2.2 KV anti-theft energisation.

22.8.11 An approved checklist of the works to be completed as per provisions of this
chapter shall be issued by Principal Chief Signal and Telecom Engineer to the
field offices. Compliance of this checklist shall be insured by the nominated
officers responsible for issue of certificate before OHE is charged at 25 KV.

Note: Please refer to concerned chapters for specific requirements for any particular
Type of equipment.

Chapter 22: Requirements Of Signalling in 25 KV AC Electrified Area Page 485 of 535