SAFETY MANAGEMENT IN ELECTRIFICATION OF RAILWAYS

DIGAJERLA SURESH 14CM43F

PURPOSE OF RAILWAY ELECTRIFICATION The contact lines permit almost unlimited power at the disposal of the

electrically driven vehicle. Permits heavier trains to achieve higher speeds. Electric Multiple Units provide fast commuter services with quick reversal at

with main line trains Electric Multiple Units offer least interference to the latter due to the EMU’s

high acceleration rates. Economy in operation and maintenance Saving in consumption of scarce diesel oil and increased through put of

traffic. The capital cost for provision of fixed installation required for electric traction

is found adequately remunerative for routes having high levels of traffic.

OVER HEAD EQUIPMENT

RAILWAY ELECTRIFICATION WORKS Main works Discipline wise Division of Worksa) Electricalb) Signal and Telecommunicationsc) Civil Engineering

Coordination of Works

Railway Electrification, being a multi-disciplinary project work, needs close coordination amongst electrical, signalling & telecommunications and civil engineering disciplines. It further needs coordination with outside agencies such as Power Supply Authorities, the Department of Telecommunications, the Revenue officials as well as with the Open Line organization or whose section the work is to be taken up. Accordingly the organization for Railway electrification coordinates works of all the disciplines and the agencies from inception to completion including support services to the open line in early stages of electric traction over the section.

SAFETY RULE FOR OHE

General Printed boards containing instructions regarding treatment of persons

suffering from electric shock should be exhibited in every OHE maintenance depot, equipment room, switching station, cabin, OHE Inspection Car shed, loco shed, OHE Inspection Car and wiring train and also in offices of SM, ASM, CYM, AYM and HTXR.

First Aid Boxes should be kept at every switching station, maintenance depot, in OHE Inspection Car, breakdown vehicle and wiring train.

Ropes, come-along clamps, Trifor etc should be tested once in six months at least, in the presence of an ATFO and record of such tests maintained in each depot.

SAFETY RULE FOR OHE

Documents to be kept with OHE Supervisors for Work on OHE. Permit to Work Protection of Staff against Traffic Movements and Protection

of Trains Earthing before Commencement of Work Protective Helmets Safety Belt

SAFETY PRECAUTIONS ON ELECTRIFIED SECTIONS SAFETY PRECAUTIONS ON ELECTRIFIED SECTIONSThe attention of all railways staff is drawn to the fact that under 25 kV ac 50 Hz single phase traction, there is heavy induction on all metallic structures and conductors in the tract.

Crane Working No crane shall be worked on or near traction overhead equipment unless an authorized representative of the OHE section is present. When so working, care shall be taken to avoid hitting or damaging OHE structures.

RULES APPLICABLE TO PERMANENT WAY STAFF Track-Circuited Rails Care in Handling Pipes Street Measuring Tapes not to be used Traction Structure FoundationThe top of foundation block of track structures shall be kept clear of all materials and kept dry.While excavating, the foundations not be exposed and there should be no risk of sinking of the foundations.

OTHER PRECAUTIONS

Precautions in the Event of Breakage of Wires Works on Signal Posts and Fittings Precautions against build up of Potential due to Return

Current in Rails. Precautions against Induction Potential in Metallic Bodies Precautions for Movement of ODCs in 25 kV as Electrified

Sections Power Blocks for Movement of ODC Movement of Rubber Tyred Vehicles on Railway Wagons Hoarding Boards

FORMS AND REGISTERS

Records to be maintained for Power Block and Permit-to Work messages

Cantilever Assembly Maintenance Register Register of Earth Resistance Measurements Register of Clearance under over line structures Register of Current Collection Tests shall be maintained. COMPETENCY CERTIFICATECompetency Certificate and Courses for Assistant Station Masters / Guards of EMUs.

References

1.Indian Railways Year Book 2002-20032. OVER HEAD EQUIPMENTS A. K. RAWAL

3. www.railway-technical.com4. www.eng.ox.ac.uk