Industrial training

Electrical Loco Shed, Ghaziabad

Abhishek Singh

Roll No.1229040005

SYNTAX USED IN LOCOS Standard “Gauge” designations and dimensions:-

W = Broad gauge (1.67 m)Y = Medium gauge ( 1 m)Z = Narrow gauge ( 0.762 m)N = Narrow gauge ( 0.610m)

“ Type of Traction” designations:-D = Diesel-electric tractionC = DC tractionA = AC tractionCA=Dual power AC/DC traction

The “ type of load” or “Service” designations:-M= Mixed serviceP = PassengerG= GoodsS = Shunting

. “ Horse power ” designations from June 2002(except WDP-1 & WDM-2 LOCOS).

•‘ 3 ’ For 3000 horsepower•‘ 4 ’ For 4000 horsepower•‘ 5 ’ For 5000 horsepower•‘ A ’ For extra 100 horsepower•‘B’ For extra 200 horsepower and so on.

Hence ‘WDM-3A’ indicates a broad gauge loco with diesel-electrictraction. It is for mixed services and has 3100 horsepower.

INTRODUCTION

ESTABLISHMENT

> Electric Loco Shed was set in 1976 by Railway Electrification Organisation (8910 SQ. MTRS).

> It’s main purpose is of maintenance of

WAP1,WAP4,WAP5,WAP7 ,WAG5, WAM4 engines.

INITIAL COSTRs. 1.5 (IN CRORES)

PRESENT LOCO HOLDING184

EMU CAR shed is an industrial-technical setup, whererepair and maintenance works of EMU & MEMU iscarried out, so as to keep the loco working properly.It contributes to increase the operational life of EMU& MEMU and tries to minimize the line failures.

The shed consists of the infrastructure to berth,dismantle, repair and test the loco and subsystems.

The shed working is heavily based on the manualmethods of doing the maintenance job and very lessautomation processes are used in sheds, especially inIndia.

The EMU CAR shed usually has:-

Berths and platforms for loco maintenance.

Pits for under frame maintenance

Heavy lift cranes and lifting jacks

Fuel storage and lube oil storage, watertreatment plant

and testing labs etc.

Sub-assembly overhauling and repairing sections

Machine shop and welding facilities.

TYPES OF TRAINS IN EMU CAR SHED

• There are three trains are inspection andmaintenance in EMU CAR shed. These are as follow :-

• 1. EMU

• 2. MEMU

• 3. DMU

EMU & MEMU

1. EMU – In EMUs one power car (motor coach) is required for three coaches so for an EMU has 12 coaches in length will have 4 power cars & mainly runs in the suburban sections of major cities. It considered as normal local trains such as life line locals of MUMBAI, HYDERABAD, CHENNI etc.

• 2. MEMU’s – In MEMUs one power car in needed for 4 coaches so MEMU are normally has 16-20 coaches long. It runs for long distance more than the suburban sections . It runs on the same line on which normal Local/Exp/Mail/SF trains runs.

• MEMU – Vadodara – Ahmadabad MEMU • MEMU were modified EMU’s introduced in 1993-94

• 3. DEMU’s – In DEMU’s , generally runs on diesel which tank capacity about >4000lts. It named as overhead electric inspection car used in repair & maintenance of overhead cables which fitted above the roof of trains carries 25kv A.C supply.

NO. OF SECTIONS

1 . MECHANICAL WORKSHOP2 . ELECTRICAL WORKSHOP3 . PAINTING WORKSHOP

MECHANICAL WORKSHOP

1. MEASUREMENT & INSPECTION SHOP2. CARPENTARY SHOP3. PENTOGRAPH SHOP4. MACHINE SHOP5. J.S.L TYPE BRAKE CYLINDER SHOP6. POH SHOP7. TRANSMISSION SHOP8. COMPRESSOR SHOP

BOGIE

BOGIE’s

A BOGIE is a wheeled wagon or trolley. Inmechanics terms, a bogie is a frame workwhich carrying wheels attached to coaches.

It is subassembly of 2 axle, 4 wheel, 4 brakecylinder , 2 side bearer, 4 bearing(doubleroller bearing), helical spring etc.

MEASURING & INSPECTION

No GO NO gauge

TYRE DEFECT GUAGE

1. Root wear

2. Sharp flange

3. Thin flange

4. Deep flange

5. Hollow tyre

6. Flat tyre (tyre condum)

TRACTION MOTOR

TRACTION MOTOR

• Traction motor refers to an electricmotor providing the primary rotational torque toa machine, usually for conversion into linearmotion (traction).

• Traction motors are used in electrically poweredrail vehicles such as electric multipleunits and electric locomotives, other electricvehicles such as electric milk floats, elevators,conveyors, and trolleybuses, as well as vehicleswith electrical transmission systems suchas diesel-electric, electric hybridvehicles and battery electric vehicles

CARPENTARY SHOP

Accessory for maintenance

• Guard seat

• Look out Glass

• Head Code Glass

• Sliding Door

• Cab Main Door

• Window

• Passenger seat

Pantograph

Pantograph

• Mounted on the roof of an electric train.• Link between the overhead line and power

circuit of electric locomotive.• Sliding along a bare contact wire of the

overhead system and conveyed to the roof line.

• 25 kv power electricity supply from overhead line to power circuit of electric locomotive.

• 4 to 6kg/cc2

Pantograph Dimension

• Length of pantograph – 2427+-5mm.

• Height of insulater bottom of panto -205+-5mm.

• Maxiam height – 2460+-20mm

• Bow height -300

• Number of turn in main spring – 25/26

• sliding angle of bow with wire – 71/2

• Time taking 1.5m height to up – 6sec

• Time taking 1.5m height to down – 10sec

Application

• Use on 2kv AC electric locomotive.

• Suitable to use on 25kv AC electric multiple unit (EMU).

• Suitable for satisfactory operation on electric locomotive up to 600hp to a speed 130km/hr.

• Rated current 400amp for AC.

• 1100amps for DC application.

MACHINE SHOP

Different types of machines are used to maintain or reshape of the tool.

• Lathe machine

• Lathe pit machine

• Shaper machine

• Radial Drill machine

• Planner machine

Pit Lathe machine

Type of wear may occur on wheel

• Tread wear

• Root wear

• Skid wear

• Flange wear

• For maintaining the required profile pit wheel lathe are used. This lathe is installed in the pit so that wheel turning is without disassembling the axle and lifting the loco and hence the name “pit wheel lathe”

• Gages are used in this section to check.

• Star gage

• Root wear gage

• Flange wear gage

• J gage

RADIAL DRILLING MACHINE

• This drill machine to performing a hole in object with the twist drill.

• Use to produce hole heavier and bigger size job.

• This drill machine rotate in all 3 axis i.e. X-axis, Y-axis, Z-axis.

• Work pice remain remain stationary while tool rotates.

• Base made of heavy column.

High power-to weight ratio.Fewer LocomotiveFast AccelerationHigher limit of speedHigher hauling capabilityNo carbon emissionLess noise pollutionMaintenance cost is 50% of that for steam engine.Steam engine requires two hours for heat up whereaselectric engine start within moment.High torque motor are used in electric traction.

ADVANTAGE OF ELECRICAL LOCO

Significant capital cost of electrification.Maintenance cost is high.Overhead wires further limit the clearance in tunnel.Railway traction need immune power, with no cuts.

DISADVANTAGES

Thank You!!