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1. BHARAT HEAVY
ELECTRICALS
LIMITED, JHANSI (U.P.)
ROTATION REPORT
&
SUMMER TRAINING PROJECT REPORT ON
Diesel - loco
FOR A PERIOD OF FIVE WEEKS
UNDER GUIDANCE OF: Submitted by:
MR. Abhishek Kumar Kamlakant Rajpoot
Production Engg. (loco) B.E. (Mechanical)
Bhart Heavy Electrical Limitted NRI Institute of technology & management
(Jhanasi ) (Gwalior)
1

2. PREFACE
Vocational training is one of the important parts of the
curriculum for the engineering students. Its basic idea is to strength
the theoretical concepts of the
students through practical training of making them acquainted with
the latest technology and development.
The philosophy of this report is to emphasize the practical
understanding of basic concept, which has been studied in the class.
I do sincerely hope that this project work wills the BHEL JHANSI
in formulating its theory and plan. I tried my best to cover, even if
there is any acutance surface, I regret for that.
2

3. ACKNOWLEDGEMENT
Training is one of the most important aspects for an engineering
student’s career. It is to strength the theoretical concepts. Through
training a student is acquainted with the latest technology and
recent development.
Firstly I convey my sincere thanks to all the B.H.E.L. employees.
Their guidance was omnipotent and incompatible throughout the
training period.
I also convey our special thanks to Mr. Sr. Manager (H.R.) for
providing us this opportunity to undergo this training. We also
express our regards to all the member of H.R.D. in B.H.E.L. JHANSI.
I would like to express my thanks to all departments for valuable
suggestion, guidance, support, encouragement and providing
necessary information for the project.
3

4. CONTENT
Sl N0. TOPIC PAGE NO.
1 An Overview of BHEL 5
2 Activity Profile of BHEL 8
3 Vision, Mission & values of BHEL 10
4 Various BHEL Units 11
5 Product Profile Of BHEL JHANSI Unit 12
6 Rotation Report 13
7 Project Report On Diesel Loco 24
8 Introduction 25
9 Parts of Diesel Loco 27
10 Locomotive Data 37
11 Wheel Base 38
12 Over All Dimansion 38
13 Capacity 38
14 Auxiliary Horse Power Requirement 39
4

5. (1) AN OVERVIEW OF BHEL
BHEL is the largest engineering and manufacturing enterprise in India in the
energy/infrastructure sector today. BHEL was established more than 40 years ago
when its first plant was set up in Bhopal ushering in the indigenous Heavy Electrical
Equipment industry in India, a dream that has been more than realized with a well-recognized
5
track record of performance.
BHEL caters to core sectors of the Indian Economy viz., Power Generation &
transmission, Industry, Transportation, Telecommunication, Renewable Energy,
Defense, etc. The wide network of BHEL’s 17 manufacturing divisions, four Power
Sector regional centers, over 100 project sites, eight service centers and 18 regional
offices, enables the company to promptly serve its customers and provide them with
suitable products, systems and services-efficiently and at competitive prices. BHEL
has already attained ISO 9000 certification for quality management, ISO 27000 for
Information Technology and ISO 14001 certification for environment management.
POWER GENERATION
Power generation sector comprises thermal, gas, hydro, and nuclear power plant
business.
TELECOMMUNICATION
BHEL also caters to Telecommunication Sector by way of small, medium and large
switching systems.
TRANSMISSION AND DISTRIBUTION (T&D)
BHEL offers wide-ranging products and systems for T&D applications. Products
manufactured include: power transformers, instrument transformers, dry type
transformers, series &shunt reactors, capacitor banks, vacuum &SF6 circuit
breakers, gas-insulated switchgears and insulators.

6. INDUSTRIES
BHEL is a major contributor of equipment and systems to industries, cement, sugar,
fertilizer, refineries, petrochemicals, paper, oil and gas, metallurgical and other
process industries. The range of systems & equipment supplied includes: captive
power plants, co-generation plants, DG power plants, industrial steam turbines,
industrial boilers and auxiliaries, waste heat recovery boilers, gas turbines, heat
exchangers and pressure vessels, centrifugal compressors, electrical machines,
pumps, valves, seamless steel tubes, electrostatic precipitators, fabric filters,
reactors, fluidized bed combustion boilers, chemical recovery boilers and process
controls.
TRANSPORTATION
BHEL is involved in the development, design, engineering, marketing, production,
installation, and maintenance and after-sales service of rolling stock and traction
propulsions systems. BHEL manufactures electric locomotives up to 5000 HP, diesel
electric locomotives from 350 HP to 3100 HP, both for mainline and shunting duty
applications. It also produces rolling stock for special applications viz. overhead
equipment cars, special well wagons, and Rail-cum road vehicle.
6
RENEWABLE ENERGY
Technologies that can be offered by BHEL for exploiting non-conventional and
renewable sources of energy include: wind electric generators, solar photovoltaic
systems, solar heating systems, solar lanterns and battery-powered road vehicles.
OIL AND GAS
BHEL’s products range includes Deep Drilling Oil Rigs, Mobile Rigs, Work Over
Rigs, Well Heads and X-Mas Trees, Choke and Kill Manifolds, Full Bore Gate
Valves, Mudline Suspension System, Casing Support system Sub-Sea Well Heads,
Block valves, Seamless pipes, Motors, Compressor, Heat Exchangers etc.

7. 7
INTERNATIONAL OPERATIONS
BHEL is one of the largest exporters of engineering products & services from
India, ranking among the major power plant equipment suppliers in the world.

8. (2) ACTIVITY PROFILE OF BHEL
8
POWER SECTOR PROJECTS
 Thermal sets and Auxiliaries.
 Steam generators and Auxiliaries.
 Industrial fans.
 Electrostatic precipitators.
 Air pre heaters.
 Nuclear power equipments.
 Hydro sets and Auxiliaries.
 Motors.
 Transformers.
 Rectifiers.
 Pumps.
 Heat Exchangers.
 Capacitors.
 Porcelain/Ceramics insulators.
 Seamless steel tubes.
 Casting and forging.
SYSTEMS/SERVICES
 Turnkey power station.
 Data acquisition Systems.
 Power systems.
 HVDC Commissioning systems.
 Modernization and Rehabilitation.

9. 9
TRASPORTATION SECTOR
 Diesel Electric generators.
 AC/DC locomotives.
 DC locomotives and loco shunters.
 Traction system for railways.
 Electric trolley buses.
INDUSTRY SECTOR
 Boilers.
 Valves.
 T.G. sets.
 Power devices.
 Solar Cells.
 Photo Voltaic cells.
 Gas Turbines.
 Compressors.
 Drive Turbines.
 Oil rigs.
 Blow out preventers.
 Wind mills.
 Control systems for electric devices.

10. (3) VISION, MISSION AND VALUES OF BHEL
10
VISION
A global engineering enterprise providing solutions for a better tomorrow.
MISSION
Providing sustainable business solutions in the fields of Energy, Industry &
Infrastructure.
VALUES
GOVERNANCE: We are stewards of our shareholders investments and we
take that responsibility very seriously. We are accountable and responsible for
delivering superior results that make a difference in the lives of the people we touch.
RESPECT: We value the unique contribution of each individual. We believe
in respect for human dignity and we respect the need to preserve the environment
around us.
EXCELLENCE: We are committed to deliver and demonstrate excellence in
whatever we do.
LOYALTY: We are loyal to our customers, to our company and to each
other.
ENTEGRITY: We work with highest ethical standards and demonstrate a
behavior that is honest, decent and fair. We are dedicated to the highest levels of
personal and institutional integrity.
COMMITMENT: We set high performance standards for ourselves as
individuals and our teams. We honour our commitments in a timely manner.
INNOVATION: We constantly support development of newer
technologies, products, improved processes, better services and management
practices.
TEAM WORK: We work together as a team to provide best solutions &
services to our customers. Through quality relationships with all stakeholders we
deliver value to our customers.

11. (4) VARIOUS BHEL UNITS
11
FIRST GENERATION UNITS
Bhopal : Heavy Electrical Plant.
Haridwar : Heavy Electrical Equipment Plant.
Hyderabad: Heavy Electrical Power Equipment Plant.
SECOND GENERATION UNITS
Tiruchy : High Pressure Boiler Plant.
Jhansi : Transformer and Locomotive Plant.
Haridwar : Central Foundry and Forge Plant.
Tiruchy : Seamless Steel Tube Plant.
UNITS THROUGH ACQUISTION & MERGER
Bangalore : Electronics Division
Electro Porcelain Division.
NEW MANUFACTURING UNITS
Ranipet : Boiler Auxiliaries Plant.
Jagdishpur: Insulator Plant.
Govindwal : Industrial Valve Plant.
Rudrapur : Component and Fabrication Plant.
Bangalore : Energy Systems Division
BHEL is growing concern to meet the changing needs of the nation has taken it beyond
power into the total gamut of energy, industry and transportation BHEL is able to offer a
service in each of this fields. It;s manufacturing capability is supported by a corporate R&D
division at Hyderabad works closely with the research and development cells at various units
and Welding Research Institute at Tiruchinapalli.

12. (5)THE PRODUCT PROFILE OF BHEL JHANSI UNIT
PRODUCTS
RATINGS
1. Power transformer
Up to 220 KV class 250 MVA
2. Special transformer
Up to 132 KV
3. ESP transformer 100 KV, 1400 MA
4. Freight Loco transformer 3900 to 5400 KVA & 7475.
12
KVA for 3 phase.
5. ACEMU transformer Up to 1000 KVA 2(1-phase).
1385 KVA (3 phase).
6. Bus-Duct transformer Up to 5000 KVA.
7. Instrument transformer
VT & CT up to 220 KV class.
8. Diesel electric locomotives
Up to 2600 HP.
9. AC/DC locomotives
5000 HP.
10. Over Head Equipment cum Test
Car
11. Well wagon
200 tone.

13. (6) Rotation Report
TRANSFORMER COMMERCIAL (TRC)
The objective of the department is interaction with the customers. It brings out
tenders and notices and also responds to them. It is this department that bags
contracts of building transformers. After delivery regarding faults, this department
does failures and maintenance. All such snags are reported to them and they
forward the information to the concerning department.
One of the major tasks of this department is to earn decent profits over all
negotiations. Transformer industry has become very competitive. The company
offering the lowest price gets the contract but this process may continue does the
work on very low profits. To avoid such a situation, a body by the name of India
Electrical and Electronics Manufactures Association (IEEMA) was set up. This
association helps to maintain a healthy competitive atmosphere in the manufacturing
of electrical appliances.
13
TRANSFORMER ENGINEERING (TRE)
The transformer manufactured in BHEL Jhansi range from 10 MVA to 250 MVA and
up to 400 KV. The various transformers manufactured in this unit are:-
POWER TRANSFORMER
a) Generator transformer
b) System transformer.
c) Auto transformer.
SPECIAL TRANSFORMER
a) Freight loco transformer.
b) ESP transformer.
c) Instrument transformer.
d) Dry type transformer.

14. 14
BAY-00 & 0:
It is a sub part of Fabrication. It is the preparation shop while the other two bays
form the assembly shop. This section has the following machines:
 Planner machine – To reduce thickness
 Shearing machine
 CNC / ANC Flame Cutting machine – To cut Complicated shaft items using
Oxy-Acetylene flame
 Bending machine
 Rolling machine
 Flattening machine
 Drilling machine
 Nibbling machine
 Pantograph flame cutting machine
BAY-1
It is also a sub part of Fabrication. It is an assembly shop where different parts of
tank come from bay 0.Here welding processes are used for assembly, after which
a rough surface is obtained Grinder operating at 1200 rpm is used to eliminate the
roughness.
BAY-2
It is also a sub part of Fabrication It is an assembly shop dealing with making
different objects mentioned below.
1-Tank assembly 5-cross feed assembly
2-Tank cover assembly 6-core clamp assembly
3-End Frame assembly 7-pin and pad assembly
4-foot assembly
Before assembly, short blasting (firing of small materials i.e., acid pickling) is done
on different parts of jobs to clean the surface before painting.

15. 15
NON DESTRUCTIVE TEST
1 Ultrasonic test to detect the welding fault on the CRO at the fault place high
amplitude waves are obtained.
2. Die Penetration test Red solution is put at the welding and then cleaned.
After some time white solution is mixed. Appearance of a red spot indicates a fault
at the welding.
3. Magnetic crack detection Magnetic field is created and then iron powder is
put at the welding. Sticking of the iron powder in the welding indicated a fault.
4. X-Ray Test: It is same as human testing and the fault is seen in X-ray film.
BAY-3
Here are basically three sections in the bay:
 Machine section
 Copper section
 Tooling section
BAY- 4
It is the winding section.
There are four types of coil fixed in a transformer, they are :
1. Low voltage coil (LV)
2. High voltage coil (HV)
3. Tertiary coil
4. Tap coil
The type of winding depends upon job requirement. Also, the width and thickness
of the conductors are designed particulars and are decided by design department.

16. Conductors used for winding is in the form of very long strips wound on a spool, the
conductor is covered by cellulose paper for insulation.
For winding first the mould of diameter equal to inner dia meter of required coil is
made .The specification of coil are given in drawing. The diameter of mould is
adjustable as its body is made up of wooden sections that interlock with each
other. This interlocking can be increased or decreased to adjust the inner diameter
of coil.
16
The moulds are of following types
1. Belly types
2. Link types
3. Cone type
BAY-5
It is core and punch section. The lamination used in power, dry, ESP transformer
etc for making core is cut in this section.
CRGO (cold rolled grain oriented) silicon steel is used for lamination, which is
imported in India from Japan, U.K. Germany. It is available in 0.27 and 0.28 mm
thick sheets, 1mt wide and measured in Kg.The sheet s are coated with very thin
layer of insulating material called “carlites”.
For the purpose of cutting and punching the core three machines are installed in
shop
BAY-6
Single-phase traction transformer for AC locomotives is assembled in this section.
This Freight locomotive transformer are used where there is frequent
change in speed. In this bay core winding and all the assembly and testing of
traction transformer is done.
Three-phase transformers for ACEMU are also manufactured in this section. The
supply lines for this transformer are of 25 KV and power of the transformer is 6500
KVA. The tap changer of rectifier transformer is also assembled in this bay.

17. Rectified transformer is used in big furnace like the thermal power stations / plants
(TPP).
17
BAY-7
1. This is the insulation shop. Various types of insulations are
2. AWWW - All Wood Water Washed press paper.
3. The paper is 0.2-0.5mm thick cellulose paper and is wound on the
conductors for insulation.
4. PRE COMPRESSED BOARD: This is widely used for general insulation &
separation of conductors in the forms of blocks.
5. PRESS BOARD: This is used for separation of coils e.g. L.V. from H.V. It is
up to 38 mm thick.
6. UDEL(Un Demnified Electrical Laminated) wood or Permawood
7. This is special type of plywood made for insulation purposes.
8. FIBRE GLASS: This is a resin material and is used in fire pron areas.
9. BAKELLITE
10. GASKET- It is used for protection against leakage.
11. SILICON RUBBER SHEET- It is used for dry type transformer.
BAY- 8
It is the instrument transformer and ESP transformer manufacturing section.
INSTRUMENT TRANSFORMER
These are used for measurement. Actual measurement is done by measuring
instruments but these transformers serve the purpose of stepping down the voltage
to protect the measuring instrument. They are used in AC system for measurement
of current voltage and energy and can also be used for measuring power factor,
frequency and for indication of synchronism. They find application in protection of
power system and for the operation of over voltage, over current, earth fault and
various other types of relays.

18. 18
ESP TRANSFORMER
The Electrostatic Precipitator transformer is used for environmental application. It is
used to filter in a suspended charge particle in the waste gases of an industry. They
are of particular use in thermal power stations and cement industry.
The ESP is a single-phase transformer. It has a primary and secondary. The core is
laminated and is made up of CRGOS. It is a step up transformer. An AC reactor is
connected in series with primary coil. The output of the transformer must be DC the
is obtained by rectifying AC using a bridge rectifier (bridge rectifier is a combination
of several hundred diodes). A radio frequency choke (RF choke) is connected in
series with the DC output for the protection of the secondary circuit and filter circuit.
The output is chosen negative because the particles are positively charged. The DC
output from the secondary is given to a set of plates arrange one after the others.
Impurity particles being positively charged stick to these plates, which can be jerked
off. For this a network of plates has to be setup all across the plant. This is very
costly process in comparison with the transformer cost. A relive vent is also provided
to prevent the transformer from bursting it higher pressure develops, inside it. It is
the weakest point in the transformer body. An oil temperature indicator and the
secondary supply spark detector are also provided.
One side of the transformer output is taken and other side has an ‘marshalling box’
which is the control box of the transformer.
BAY-9
In this bay power transformer are assembled. After taking different input from
different bays 0-9 assembly is done.Power transformer is used to step and step
down voltages at generating and sub-stations. There are various ratings –11KV,
22KV, manufactured, they are
Generator transformer.
System &
Auto transformer.

19. A transformer in a process of assemblage is called a job. The design of the
transformer is done by the design department & is unique of each job; depends on
the requirement of customer. The design department provides drawing to the
assembly shop, which assembles it accordingly.The steps involved in assembly
are:
19
1. Core building
2. Core Lifting.
3. Unlacing.
4. Delacing and end-frame mounting.
5. High voltage terminal gear and low volt terminal gear mounting.
6. Vapour phasing and oil soaking
7. Final servicing and tanking.
8. Case fitting.
STORE
There are three sections in store:
1. Control Receiving Section
2. Custody Section
3. Scrap Disposal Section
LOCOMOTIVE PRODUCTION (LMP)
There are following products are manufactured at Loco shops
 Alternating Current Locomotive (ac Loco)
 WAG-5H
 AC./D.C. Loco
 WCAM-2P
 WCAM-3
W-broad gauge A-running in AC mode
C-running in DC mode G-hauling goods train

20. P-hauling passenger train M-hauling passenger
20
& goods train
 Diesel Electric Locomotive Shunting (DESL)
 350 HP
 700 HP
 Single Power Pack (SPP): One 700 HP m/c is made as a single
Unit. It is a meter gauge locomotive
 Twin Power Pack (TPP): 2 350HP m/cs are combined in 1 engine
& can be operated individually or in combination depending on the
load.
 450 HP
 1400 HP
 1150 HP
 1350 HP
 2600 HP
1150 HP and 1350 HP DESL s are non-standard locomotives and are
modified versions of 1400 HP DESL based on requirement of customer.
Under mention are the new non-conventional products designed and
developed for Indian Railways based on their requirement.
 OHE (Overhead electric) recording and testing cars
 UTV(Utility vehicle )
 RRV(Rail cum road vehicle)
 DETV( Diesel electric tower car)
 BPRV(Battery power road vehicle)
 BCM(Blast cleaning machine)
 200 T Well wagon for BHEL Haridwar
 Metro Rake-Kolkata Metro Railways

21. 21
LOCOMOTIVE MANUFACTURING (LMM)
This section deals with manufacturing of locomotives. The main parts of the
locomotive are
 Under frame: The frame on which a locomotive is built
 Super structure: The body of locomotive is called
superstructure or Shell and is made of sheet of Mild steel
 DC motor
 Alternator
 Compressor
 Flower
 Static Rectifier-MSR
 Static Converter-SC
 Exchanger
Bogie-The wheel arrangement of a loco is called a bogie. A bogie
es sentially contains
– 1-wheel axle arrangement
– 2-Suspension
– 3-Brake rigging
Traction transformer: It is fixed on under frame and gets supply from an
overhead line by equipment called pantograph. The type of pantograph
depends on supply. This transformer steps down voltage and is fitted
with a tap changer. Different taps are taken from it for operating different
equipment. One tap is taken and is rectified into DC using MSR and is fed to the
DC motor
Railways has two types of power supplies – 25 KV , 1 Phase ,50hz AC
-1500 V DC
An AC/DC loco is able to work on both of these supplies. For e.g. WCAM-3.

22. WORK ENGINEERING & SERVICES (WE&S)
This department looks after the commissioning and maintenance of all the
machinery used in the factory. It also has 3 two-stage air compressors for
supplying compressed air to the various bays.
The department has 03 different divisions:
22
 Electrical Engg
 Electronics Engg
 Mechanical Engg
ELECTRICAL ENGINEERING:
This division looks after all the electrical machinery and power distribution of the
factory. Snags detected in the system are immediately reported to this dept by the
concerning dept.WE&S takes prompt action to rectify it.
The factory has a feeder of 11KV .The total load sanctioned for
the factory is 2500MVA But the maximum demand reaches the range of
1700-2000 MVA.
CENTRAL QUALITY SERVICE
First we get acquainted with a few terms concerning this department.
QUALITY
It is the extent to which products and services satisfy the customer needs.
QUALITY ASSURANCE
All those plants and systematic action necessary to provide adequate confidence
that a product or service will satisfy the given requirement is called quality
assurance.

23. QUALITY CONTROL
The operational technique and activities that are used to fulfill requirement for quality
are quality control.
QUALITY INSPECTION
Activities such as measuring, testing, gauging one or more characteristics of a
product or service and comparing these with specified requirement to determine
conformity are termed quality inspection.
23

24. PROJECT
REPORT
ON
DIESEL -LOCO
24

25. INTRODUCTION
BHEL deals with the two types of locomotive-
25
1. Diesel locomotive
2. Electric locomotive
Further diesel loco may be classified into two groups i.e.TPP & SPP
BHEL has subsequently diversified into manufacturer of rolling stock products-
1. Diesel Electric loco
2. Electric locomotive (AC,AC/DC)
3. Special wagon (200 T well wagon)
OHE Recording Cum Test Car
Diesel loco further classified as follows-
1.Diesel Electric
2.Diesel Hydraulic
In diesel electric an alternator is used where as in diesel hydraulic a torque converter
is used.
The report is concerned with an electric loco i.e. WAG- 7A
Which is a crew friendly loco.
W - Broad Guage
A - running in AC mode
G - hauling goods train
BHEL Jhansi has got order to develop WAG-7 of 5000 HP in quantity of 50 by Indian
Railways.

26. Diesel Locomotive
A diesel locomotive is a type of railway locomotive in which the prime
mover is a diesel engine. Several types of diesel locomotive have been
developed, differing mainly in the means by which mechanical power is
conveyed to the driving wheels (drivers).
Diesel-Electric Locomotive
26

27. Twin Power-Pack 700HP Diesel Engine
Single Power-Pack 2400HP Diesel Engine
27

28. Parts of a Diesel Locomotive
28
 Diesel Engine
 Main Alternator
 Auxiliary Alternator
 Rectifier
 Motor Blower
 Air Reservoirs
 Turbo charger
 Battery
 Air Compressor
 Radiator & Radiator fan
 Hydraulic Transmission
 Traction Motor
 Pinion/Gear
 Fuel Tank
 Drive Shaft
 Gear Box
 Sand Box

29. 29
Diesel Engine:-
This is the main power source for the locomotive. It comprises a large cylinder
block, with the cylinders arranged in a straight line or in a V .The engine
rotates the drive shaft at up to 1,000 rpm and this drives the various items
needed to power the locomotive. As the transmission is electric, the engine is
used as the power source for the electricity generator or alternator, as it is
called nowadays. A diesel engine (also known as a compression-ignition
engine) is an internal combustion engine that uses the heat of compression to
initiate ignition to burn the fuel that has been injected into the combustion
chamber.
Main Alternator :-
The diesel engine drives the main alternator which provides the power to move the
train. The alternator generates AC electricity which is used to provide power for the
traction motors mounted on the trucks (bogies). In older locomotives, the alternator
was a DC machine, called a generator. It produced direct current which was used to
provide power for DC traction motors. Many of these machines are still in regular
use. The next development was the replacement of the generator by the alternator
but still using DC traction motors. The AC output is rectified to give the DC required
for the motors.

30. 30
Auxiliary Alternator :-
Locomotives used to operate passenger trains are equipped with an auxiliary
alternator. This provides AC power for lighting, heating, air conditioning, dining
facilities etc. on the train. The output is transmitted along the train through an
auxiliary power line.

31. 31
Rectifier :-
The output from the main alternator is AC but it can be used in a locomotive with
either DC or AC traction motors. DC motors were the traditional type used for many
years but, in the last 10 years, AC motors have become standard for new
locomotives. They are cheaper to build and cost less to maintain and, with electronic
management can be very finely controlled.
To convert the AC output from the main
alternator to DC, rectifiers are required. If the motors are DC, the output from the
rectifiers is used directly. If the motors are AC, the DC output from the rectifiers is
converted to 3-phase AC for the traction motors.
Motor Blower :-
The diesel engine also drives a motor blower. As its name suggests, the motor
blower provides air which is blown over the traction motors to keep them cool during
periods of heavy work. The blower is mounted inside the locomotive body but the
motors are on the trucks, so the blower output is connected to each of the motors
through flexible ducting. The blower output also cools the alternators. Some designs
have separate blowers for the group of motors on each truck and others for the
alternators.

32. 32
Air Reservoirs :-
Air reservoirs containing compressed air at high pressure are required for the train
braking and some other systems on the locomotive. These are often mounted next to
the fuel tank under the floor of the locomotive.
Turbo charging :-
The amount of power obtained from a cylinder in a diesel engine depends on how
much fuel can be burnt in it. The amount of fuel which can be burnt depends on the
amount of air available in the cylinder. So, if you can get more air into the cylinder,
more fuel will be burnt and you will get more power out of your ignition. Turbo
charging is used to increase the amount of air pushed into each cylinder. The
turbocharger is driven by exhaust gas from the engine. This gas drives a fan which,
in turn, drives a small compressor which pushes the additional air into the cylinder.
Turbocharging gives a 50% increase in engine power.
The main advantage of the turbocharger is
that it gives more power with no increase in fuel costs because it uses exhaust gas
as drive power. It does need additional maintenance, however, so there are some
type of lower power locomotives which are built without it.

33. 33
Battery :-
Just like an automobile, the diesel engine needs a battery to start it and to provide
electrical power for lights and controls when the engine is switched off and the
alternator is not running.
Air Compressor :-
The air compressor is required to provide a constant supply of compressed air for
the locomotive and train brakes.

34. 34
Radiator & Radiator fan :-
The radiator works the same way as in an automobile. Water is distributed around
the engine block to keep the temperature within the most efficient range for the
engine. The water is cooled by passing it through a radiator blown by a fan driven by
the diesel engine.
(Radiator fan) (Radiator)
Hydraulic Transmission :-
Hydraulic transmission works on the same principal as the fluid coupling but it allows
a wider range of "slip" between the engine and wheels. It is known as a "torque
converter". When the train speed has increased sufficiently to match the engine
speed, the fluid is drained out of the torque converter so that the engine is virtually
coupled directly to the locomotive wheels. It is virtually direct because the coupling is
usually a fluid coupling, to give some "slip". Higher speed locomotives use two or
three torque converters in a sequence similar to gear changing in a mechanical
transmission and some have used a combination of torque converters and gears.
(Hydrolic tank)

35. 35
Traction Motor :-
Since the diesel-electric locomotive uses electric transmission, traction motors are
provided on the axles to give the final drive. These motors were traditionally DC but
the development of modern power and control electronics has led to the introduction
of 3-phase AC motors.
Pinion/Gear :-
The traction motor drives the axle through a reduction gear of a range between 3 to
1 (freight) and 4 to 1 (passenger).

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Fuel Tank :-
A diesel locomotive has to carry its own fuel around with it. The fuel tank is
normally under the loco frame and This huge tank in the underbelly of the
locomotive holds 2,200 gallons (8,328 L) of diesel fuel.
Drive Shaft :-
The main output from the diesel engine is transmitted by the drive shaft to
the alternators at one end and the radiator fans and compressor at the other
end.
Gear Box :-
The radiator and its cooling fan is often located in the roof of the locomotive.
Drive to the fan is therefore through a gearbox to change the direction of the
drive upwards.
Sand Box :-
Locomotives always carry sand to assist adhesion in bad rail conditions. Sand is not
often provided on multiple unit trains because the adhesion requirements are lower
and there are normally more driven axles.

37. Locomotive Data
General Data Of Locomotive:-
 Model No. : WDM2
 Specification : 16 cylinder V-type 4
37
strokeDiesel Engine
 Type : Co-Co
 Power : 700hp, 1400hp, 2400hp
 Maximum Speed : 120 kph
 Gear Ratio : 68/18
 Compression Ratio : 16:1
 Cylinder Bore : 230mm
 Cylinder Stroke : 279mm

38. Wheel Base
 Wheel Dia : 1092mm
 Wheel Base : 12834mm
 Traction Motor : Bhel 165
 Track Gauge : 1676mm
 Brake Equipment : Vaccun/Air
Maximum Overall Dimension
Height : 4185mm
Width : 3010mm
Length : 17120mm
Capacity
Fuel : 5000 lt
Cooling Water : 1210 lt
Lube Oil : 910 lt
Water Expansion : 155 lt
Sand : 0.4 m3
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39. Auxiliary Horse Power Requirement
Auxiliary Generator Maximum : 17HP
Exciter Maximum : 12HP
Traction Motor : 400HP
Blower at full speed : 62HP
Radiator Fan : 80HP
Expresser Unloaded at 1000 rpm : 13 HP
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