SUBMITTED BY-

KANHAIYA KUMAR

MECHANICAL ENGINEERING, B. TECH 3RD YEAR

GURU GHASIDAS UNIVERSITY

Reg. No.-

…………………………………… ………………………………….

SIGNATURE OF SIGNATURE OF

CTI/ TTC PRINCIPAL/TTC

A REPORT ON OVERVIEW OF CHITTARANJAN LOCOMOTIVE WORKS

CHITTARANJAN LOCOMOTIVE WORKS

CLW

CONTENT

1. HISTORY

2. HOW TO REACH CLW

3. TYPES OF LOCO PRODUCED BY CLW

4. FLOWCHART OF ELECTRIC LOCO MANUACTURING

5. MANUFACTURING SHOPS

6. AXLE FLOWCHART

7. MECHANICAL PART OF LOCO

8. ELECTRICAL PART OF LOCO

9. GALLERY

CLW

HISTORY

Chittaranjan Locomotive Works (CLW) is the dream of the nation’s visionaries, coming true. The

planners of the Nation with their deep insight and foresight set to build a Loco building Factory in

West Bengal and CLW is that vision, coming true. On the 9th of January 1948, survey of the

proposed area was done.

During pre-construction days

The rocky soil was an advantage in erecting foundations for heavy structural work and the

undulating terrain solved the problem of drainage for the township while the schemes of the DVC

envisaged hydro-electric and thermal power stations in the vicinity assured cheap power

availability in the near future. It is the only major Electric Locomotive builder in the country. It is

situated just at the Border of West Bengal and Jharkhand and is at about 32 km from Asansol and

237 kms from Kolkata.

The place where today CLW is situated was actually a hamlet of small villages. The locoworks with

its ancillary workshops has a stores purchase office in Kolkata and inspection cells in New Delhi,

Mumbai, Kolkata and Bangalore.

The Workshop has an area of 18.34 Sq. Km. The issue of setting up a loco building unit continued

to be under active consideration of the Central legislature and in the late thirties, a committee

consisting of M/s. Humphries and Shrinivasan was appointed to investigate the possibility of

establishing a locomotive manufacturing unit and to consider its economic viability. The initial

project, at Chandmari, a place near Kanchrapara, in the state of West Bengal, could not mature

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due to partition, which inevitably necessitated a change of site. This present site at Chittaranjan

was selected after a fresh survey and Railway Board’s approval was obtained in the year 1947. The

locoworks was initially established for production of 120 average sized steam locomotives with the

capacity to manufacture 50 spare boilers.

The production of Diesel Hydraulic Locomotives was taken up during 1968. After manufacturing

2351 Steam Locomotives of 5 types and 842 Diesel Hydraulic Locos of 7 types, production of steam

and diesel hydraulic locos were discontinued from 1973-74 and 1993-94 respectively

The production of Electric Locomotives commenced in 1961. In the process, fifteen versions of

electric locomotives were produced by CLW and the latest in that series is the freight locomotive

WAG-7 and passenger locomotive WAP-4. Pandit Jawaharlal Nehru, the first Prime Minister of

India, commissioned the first 1500 V dc Locomotive named “LOKMANYA” on the 14th October,

1961. The production of 25 kV ac loco commenced on 16th November, 1963. The first Electric Loco

turned out from CLW, christened as “BIDHAN” was a Broad Gauge 25 kV a.c. Freight Locomotive

(WAG-1) of 2840 hp with maximum speed of 80 km/hr. Subsequently CLW gradually upgraded the

horsepower of Electric Loco from 2840 hp to 6000 hp and maximum speed from 80 Km/h to 160

km/h. CLW also built 25 kV ac/1500 V dc, ac/dc Loco, WCAM-1 for hauling Mail / Express Trains

from BRC to BCT on W.Rly.

Lokmanya’ WCM-5

CLW

CLW became the first production unit in the developing countries, second in Asia and fifth in the

world to manufacture 3-phase state of the art GTO Thyristor controlled Electric Locomotive and

the first indigenous 6000 hp freight electric loco WAG-9 christened as “NAVYUG” was turned out

on 14th November, 1998. During the year 2000-01 the first passenger version of three phase loco

WAP-5 called “NAVODIT”, with maximum service speed of 160 km/h and having a potential upto

200 km/h, has been manufactured. Developments of sources, indigenisation and cost reduction of

three-phase loco have been the highest priority items. The towering imported cost of Rs. 35 crores

for 3 phase loco has been drastically brought down to about Rs.12.5 crores.

Production of DC Traction Motors and Control Equipment commenced in April, 1967. Currently

both DC & AC traction motors are being manufactured. Steel foundry was set up in 1962-63 for

manufacture of cast steel loco parts. CLW has in house facilities for machining and assembly of

wheel sets, fabrication and machining of bogies etc. The facilities include modern CNC machines,

plasma-cutting machines, inert gas welding sets etc. 

River Ajay flows past CLW along its northern side. Workshops, offices and quarters are spread over

the whole are with ample space in between – surrounded by greenery and trees. There are several

water bodies in CLW exhibiting a lush green environment which attract a large number of

migratory birds every year. A variety of flora and fauna can be seen here all the year round.

The efforts have been recognized by the World Environment Foundation and the Golden Peacock

award for Environment Management 2006, has been conferred on 9th June 2006.

CLW has complied fully with the provisions of the Industrial Safety Act, 1948. CLW in its safety

policy aims to ensure 100% safety for all workers working in Chittaranjan Locomotive Works. CLW

is the proud recipient of the Safety innovation award 2006. The award was conferred on CLW on

6th September, 2006 by the Safety and Quality forum of the Institute of Engineers (India).

CLW has recorded the best ever performance during 2007—08 in terms of outturn of locos and

financial indices. The year 2007-08 culminated with the inventory under stores at Rs. 161 crores as

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against the target of Rs. 172 crores communicated through Final Grant for 2007-08, which has

resulted in an all-time low stores turnover ratio of 10.75 as compared to 12.69 of the previous

year.

The WMS turnover ratio has also decreased to 5.61 in comparison to that of 2006-07 which was

8.67. The target of Rs. 284 crores for manufacture of components was surpassed and the figure

was Rs. 315 crores. The target of Rs. 85 crores, for sale and transfer of bought out items has been

fully achieved. Auction sale proceeds exceeded Rs. 8 crores. Full credit of Rs. 1500 crores has been

realized under Board’s RSP for 200 locomotives as per target given by Railway Board. The target of

Rs. 19 crores kept for supply of cast items (HS CASNUB Bogie) has been fully achieved. With all

these the net plan outlay is likely to be Rs. 32 crores only which is much below the target of Rs. 47

crores communicated by Railway Board in the Final Grant for 2007-08.

CLW enters its Diamond Jubilee year w.e.f 26th January, 2009. A yearlong celebrations are in the

offing. A kite flying Competition was held on March, 2009, to commemorate CLW’s stepping into

its Diamond Jubilee year. The programme brought together the residents of the township, in

celebrating the year.

CLW

HOW TO REACH CLW

Chittaranjan Locomotive Works (CLW), located in the land of Viswa Bharati , a great educational

and cultural seat in the world, is the premier electric loco producer in this country. Situated at the

border of West Bengal and Jharkhand, it is about 32 kms away from Asansol and 237 kms from

Kolkata, the state capital. The place where CLW is situated today was a small unknown hamlet of

Santhals in the pre-industrialization era. Once the construction of the loco unit started, a wave of

all round development reached this distant place and gradually it has become a modern railway

township equipped with all modern facilities. Spread over an area of 18.34 sq. kms , CLW houses

workshops, offices, schools college, staff quarters, cinema hall, indoor stadium and auditorium.

Apart from its expertise in rolling out state- of-the-art electric locos and providing Indian Railways

much needed motive power, Chittaranjan is also a hot spot for nature lovers, and all those who

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want to soothe their frayed nerves in the lap of mother nature. Its serene environment, lush

green fields and plethora of unknown birds welcome all visitors. It’s ideal to visit Chittaranjan

from November to March every year. Every winter, migratory birds, after covering thousand miles

come to the seven lakes within the township. If you are a nature lover, you will surely be

delighted to get a glimpse of CLW’s flora and fauna. Come and explore this treasure trove.

TYPE OF ELECTRIC LOCO

WAP–7- The “Heavy Haul” Passenger locomotives of IR:-

Intercity and interstate fare friendly Passenger market

has of late shown a strong and sustained growth in

recent times. This market needs very powerful Electric

locos which can haul 24 to 26 coaches at speeds in the

 

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range of 130/ 140 kmph. To meet the surging demands

of this amazingly exploding Passenger market segment,

CLW has come out with a 6000 H.P loco premium

Electric loco product – WAP-7.WAP-7 class loco is

based on WAG-9 platform and differs from WAG-9 in

gear ratio and the control software. Locomotive rated

at 6000 hp is design to the starting tractive effort of

323 KN and maximum braking effort is 260 KN.

 6000 HP 25 KV 3-phase Passenger Electric

Locomotive WAP-7

 

   Need :-

This loco also is capable to give 6000 hp on rail upto its rated speed of 100 kmph which gives

superior section clearing capability especially in handling speed restriction.

  Salient Details :-

Horse Power 6000

Supply System 25kV, AC, 50 Hz.

Track Gauge 1676 mm (Broad Gauge)

Total weight 123.0 + 1%t.

Wheel Diameter 1092 mm (New ), 1016 mm (Full Worn)

Length over buffers 20562 mm

Panto locked down height 4255 mm

Type of Traction motors 6FRA 6068, 3-phase Squirrel Cage Induction Motors

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Continuous Power at wheel rim 4500 kW (6000 hp)

Starting Tractive effort 323 Kn

Max. Service Speed 140 kmph

Brake System Air, Regenerative & parking

Drive System 3 phase Drive with GTO Thristors and microprocessor based

VVVF Control.

WAP-4

CLW

  

This 5000 HP locomotive was evolved to

meet the requirement of hauling longer

trains of 24 coaches at higher speed up to

130 kmph over Indian railways. This loco is

presently hauling important high-speed

trains on Indian Railways. These are six

axles loco with axle and nose suspended

drive.

  

5000 HP 25 KV AC WAP 4 Passenger Electric Locomotive.

   

   Need :-

Due to advanced mechanical design especially those of bogies, the locomotive has low unsprung masses and is truly

track friendly. Presently WAP-5 is the only passenger locomotive with fully suspended drive. Anti-collision posts give

locomotive superior crash worthiness. The fleet of WAP-5 class locomotives is now being geared up for the proposed

150 kmph services

  Salient Details :-

System 25 KV, AC, 50 Hz.Class of Loco WAP-4Track Gauge 1676 mm (Broad Gauge)Axle arrangement Co-CoBrake System Air and RheostaticTotal weight 112.8 + 1% t.`

Wheel Diameter 1092 mm (New) , 1016 mm (Full worn)

Length over buffers 18794 mm

Panto locked down height 4232.5 mm

Traction Motor type HS 15250A, DC Series Motor

Continuous Power at Wheel Rim 5000 HP

Starting Tractive Effort 30.8 t

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Control System Voltage 110 V DC

 

  WAP - 5 : 5400 hp,25 kV ac, B.G. 160 km/hr. speed,3-phase drive

WAP-5 class locomotives employ advanced control and propulsion technology and are capable to deliver 5400 hp on rail. The locomotive has all the hallmarks of a high-speed propulsion unit viz. light weight, fully suspended drive and disc brake. Though presently, it has been certified for 160 kmph operation, the locomotive has been designed to give a service speed of 200 kmph with test speed potential of 225 kmph. Since IR is currently facing severe competition in Premium Passenger airlines, sooner or later, IR will have to introduce medium high speed intercity Passenger Services. This emerging market will call for powerful Electric locos with 150 kmph plus speed potential to be deployed in the immediate future and WAP-5 is the locomotive of choice for this Passenger Services market of IR.

  

  5400 HP 25 KV 3 phase Passenger Electric Locomotive WAP-5

Need :-

Due to advanced mechanical design especially those of bogies, the locomotive has low unsprung

masses and is truly track friendly. Presently WAP-5 is the only passenger locomotive with fully

suspended drive. Anti-collision posts give locomotive superior crash worthiness. The fleet of

WAP-5 class locomotives is now being geared up for the proposed 150 kmph services

Salient Details :-

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Horse Power 5400

Supply system 25 kV, AC, 50 Hz.

Track Gauge 1676 mm (Broad Gauge)

Axle Arrangement Bo-Bo

Total weight 78+ 1%t

Axle Load 19.5 + 2%t.

Wheel Diameter 1092 mm (new ),1016 mm (Full Worn)

Length over buffers 18162 mm

Panto locked down height 4237 mm

Max. Service Speed 160 kmph

Type of Traction motors FXA 7059, 3-phase Squirrel Cage Induction Motors

Traction Motor Mounting Fully suspended

Continuous Power at wheel rim 4000 kW (5450 hp)

Starting Tractive Effort 258 KN

Control System Voltage 110 V dc

Drive System3 phase Drive with GTO Thyristors and

microprocessor based VVVF Control.

Multiple Unit operation Maximum 2 locos.

Hauling Capacity 26 coaches at 140 km/ hr on level.

Brake System Air, Regenerative & parking

WAG-7

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Built by CLW to RDSO specifications, these represent

the next indigenous design step up from the WAG-5

locomotives. Used primarily for goods haulage, these

locos have a Co-Co wheel arrangement with high-

adhesion bogies (shared with WCAG-1, WCAM-3,

WDG-2/3A) and Hitachi motors providing 5000hp.

Starting TE 402kN (41000kgf); continuous TE 235kN

(24000kgf). Adhesion 34.5%. The higher tractive effort

compared to the WAG-5 locos allows them to attain

higher balancing speeds under load. The first 71 of these all went to the Mughalsarai shed. Kanpur

was the second shed to get these locos.

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Traction motors are permanently coupled in parallel and speed control is through the use of

transformer taps. Max. speed is 100km/h. Air brakes and dynamic (rheostatic) brakes for loco,

dual train brakes. MU operation with up to 4 units is possible. Traction equipment such as the

smoothing reactor, etc., are all higher rated than in the WAG-5 due to the higher currents this loco

draws. Auxiliaries include Rigi compressor, Arno rotary converters, Siemens smoothing reactor,

Northey exhauster; other auxiliaries such as blowers from S F India. A number of these locos have

been retrofitted with static converters to power

the auxiliaries, replacing the older Arno rotary

converters. These static converters are more

efficient and require less maintenance, besides

having self-diagnostic systems to make

troubleshooting easier.

These locos too, have limitations similar to the

WAG-5 in not being able to start and haul 4500-

4700t loads on gradients steeper than 1:200.

When they were being designed and introduced, experiments were carried out to vary the gear

ratio. The high-adhesion bogies also underwent some modifications for reduction of weight

transfer.

The WAG-7H designation is applied to two locomotives of the WAG-7 class that were

experimentally modified to provide higher TE by increasing their weight. Oscillation trials were

conducted on a ballasted WAG-7 (#27002) around 1995, and then a new WAG-7 loco was built by

CLW to have higher weight using thicker plates in the underframe of the loco (#27061, 1995).

Weight is 132t, max. TE 441kN (45000 kgf). Traction motors are Hitachi HS15250-G, perhaps a

minor variant of HS15250.

[4/04] Newer WAG-7's have been spotted (e.g., #27455 'Samrat') that externally look somewhat

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like a WAG-9 and with several improvements such as closed-circuit cameras for monitoring the

pantograph and GR, a spotlight to illuminate the pantograph at night, large green lamps to

exchange signals on the run, fog lamps, and single-piece windshield. New Katni shed is especially

known to add the OHE monitoring equipment to WAG-7 locos. Cabs of some units are air-

conditioned. Newer batches of WAG-7's [12/04] also have data loggers and train parting alarms

(based on sensors for detecting loss of brake pressure), as standard equipment. They are also said

to have 'microprocessor control' although it is not clear what this implies.

Traction Motors: Hitachi HS15250-G (a variant of the standard HS15250 with higher current

rating (Thicker wire gauge, better insulation); see description under WAP-4.) Motors built by CLW

and BHEL.

Gear Ratio: 65:18 (65:16?)

Transformer: CCL India, type CGTT-5400, 5400kVA, 32 taps.

Rectifiers: Two silicon rectifiers, cell type S18FN350 (from Hind Rectifier), 64 per bridge, 2700A /

1050V per cubicle.

Axle load: 20.5t

Bogies: Alco High-Adhesion bogies, fabricated bogie frame assembly, with unidirectional

mounting of traction motors, primary and secondary suspension.

Hauling Capacity: 3010t

Pantographs: Two Stone India (Calcutta) type AN-12.

Current Ratings: 1350A/2min, 1200A/10min, 960A/hr, 900A continuous

WAG-9 - The “Heavy Haul” Freight locomotive of IR:-

CLW

6000 HP, 25 KV, 3- phase Freight Electric Locomotive WAG-9

Rail Freight market which is registering a remarkable growth

since 2000, has also triggered a buoyancy in demand for

Electric Freight locomotives. Almost 60 – 65 % of IR’s freight

handling takes place over IR’s Electrified Golden Quadrilaterals

and Diagonals, though it accounts for only 25 % of its route

kilometrage. Golden Quadrilateral and Diagonals being

saturated routes, need heavy throughput and faster sectional

clearance. This is where these heavy haul and speedier WAG-9

locos play a significant role. This Gem of a loco is indeed a rail

operator’s delight.This six axle loco with axle and nose

suspended drive is designed to give a starting tractive effort of

460 KN and maximum braking effort of 260 KN. Rated 6000

hp, the loco has also been successfully adapted to give 508 KN

of starting tractive effort with additional ballast. This loco also

is capable to give 6000 hp on rail upto its rated speed of 100

kmph which gives superior section clearing capability

especially in handling speed restriction.

CLW

Need :-

Due to advanced mechanical design especially those of bogies, the locomotive has low unsprung

masses and is truly track friendly. Presently WAP-5 is the only passenger locomotive with fully

suspended drive. Anti-collision posts give locomotive superior crash worthiness. The fleet of

WAP-5 class locomotives is now being geared up for the proposed 150 kmph services

Salient Details :-

Gauge 1676 mm

Continuous HP 6000

Starting Tractive effort 460KN (47t)

Max, Speed 100 kmph

Breaking Air, Regenerative

Wheel Arrangement Co-Co.

System Voltage 25KV AC, 50 Hz.

Weight of loco 123t.

Type Freight

SHOP NO. 16

FLOWCHART OF ELECTRIC LOCO MANUACTURING

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MANUFACTURING SHOPS

WHEEL AND AXLE SHELL

FITTING AT SHOP NO. 09

MACHINING AT SHOP NO. 08

MOTOR PREPARED AT SHOP NO. 23

BOGIE

FABRICATION AT SHOP NO. 5, 15, 25

BOGIE MACHINING IN SHOP NO. 1FF8

BOGIE ASSEMBLY AT SHOP NO. 1F8

ENTIRE UNDERRAME AND ROO IS ITTED AT SHOP NO. 26, 16

ELECTRICAL TESTING IN SHOP NO. 19

PAINTING AT SHOP NO. 16

DISPATCH

CAB FAB AT SHOP NO. 12

UNDERFRAME

ASSEMBLED AT SHOP NO.15

SIDE WALL AND ROOF IS PREPARED AT SHOP NO. 26

CLW

WHEEL SHOP 09

CLW has complete facilities for Axle Machining, Wheel Turning and assembly of the wheel sets.

The Suspension Tubes and Axle Box housings are cast in Steel Foundry and machined in-house.

CLW assembles wheel sets not only for our current range of locomotives, but also for the Zonal

Railways for their spares requirements in respect of our current and also former range of

locomotives. Besides, the machining of major items such as Bolster, Hitachi T.M Magnet Frame, &

3 phase TM Stator is done in-house.

Facilities also exist for manufacturing a wide range of light items required for

Electric Loco production. Besides, the regular production of Electric loco and related items, CLW

has a well-established Steel Foundry shop which caters to the need of the entire Electric loco steel

castings items and also supply spares to the zonal railways.

AXLE FLOWCHART

ROUGH AXLE CENTRE DRILLINGFACING AND CENTERING

CNC AXLE TURNING M/c

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RECESSING AND GROOVING

CNC AXLE TURNING M/c

TURNINGHAND GRINDING

GRINDING RADIUSING/CRAVEN LATHE

DRILLING

INSPECTION

OKRECTIICATION

OK

NDTREADY OR DISPATCH TO ASSEMBLY SECTION

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TOOL ROOM 52

Tool Rooms supplies toolings, gauges, jigs and fixtures for production requirements of various

shops and also carries out calibration of various gauges, fixtures, instruments etc. to meet the ISO

requirements.

SMITHY & FORGE SHOP

SFS undertakes fabrication of End structure, Head stock of WAG-7 loco, forging of small

component of loco assembly, assembly of casnub bogie.

LIGHT MACHINE SHOP

LMS manufactures small components like various types of pins, bushes, traction motor blower

holding plates etc. to meet the requirement of loco production as well as spares required for zonal

railways.

HEAT TREATMENT SHOP

Heat Treatment Shops undertakes heat treatment of bogies manufactured in Loco Shops and

other items e.g. Magnet Frame, Equalizer, Compensating Beams etc. manufactured in Heavy

machine shop.

TRANSPORT SHOP (TPT)

Transport shop maintains all road vehicles consisting of passenger vehicles like cars, Jeeps, Mini

Buses and industrials vehicles like Truck, forklift, Dumpers, tractors, Platform Trucks/Listers sky

lifts for movement of material.

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HEAVY MACHINE SHOP 08

Heavy Machine Shop undertakes the machining of components for loco production as well as

meeting the spares required for zonal railways such as suspension tube , 3-phase Stator for WAG 9

& WAP 5 locos, Hitachi Magnet Frame, Equalizer & Compensating beams etc.

Machining work of Steel castings from Steel Foundry like casnub bogie bolster & side frame, brake

beam, center pivots for UIC/Casnub Bogie are also done in HMS.

MECHANICAL PARTS

AXLE AND WHEEL

Axle and wheel are joint by interference fit.

CLW has complete facilities for Axle Machining, Wheel Turning and assembly of the wheel sets.

The Suspension Tubes and Axle Box housings are cast in Steel Foundry and machined in-house.

CLW assembles wheel sets not only for our current range of locomotives, but also for the Zonal

Railways for their spares requirements in respect of our current and also former range of

locomotives. Besides , the machining of major items such as Bolster, Hitachi T.M Magnet Frame,

& 3 phase TM Stator is done in-house.

Facilities also exist for manufacturing a wide range of light items required for

Electric Loco production .Besides, the regular production of Electric loco and related items ,CLW

has a well-established Steel Foundry shop which caters to the need of the entire Electric loco steel

castings items and also supply spares to the zonal railways.

WAG-7 6 AXLE (CO-CO)

WAG-9 6 AXLE (CO-CO)

WAP-4 6 AXLE (CO-CO)

WAP-7 6 AXLE (CO-CO)

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WAP-5 4 AXLE (BO-BO)

BOGIE FRAMES

CLW has the requisite facilities and undertakes complete fabrication and machining of fabricated

types of bogies for its current range of Electric Loco Production. The Electric Locomotive types

WAG-9, WAP-5 and WAG-7 are equipped with fabricated bogies. CLW has its own Steel Foundry

which turns out cast steel bogies for our current WAP-4 locomotive, and even for our prestigious

range of Electric locomotives on demand from Zonal Railways and also for Diesel locomotives.

PANELS

The Switchgear / Relay panels of the Electric Locomotives WAP-4 / WAG-7 and drivers desk are

assembled in- house. The frames of these Switchgear / Relay. Panels are partly procured from

trade and partly fabricated in house. For 3-phase AC locos. Panels like HB-1/HB-2. SB-1/SB-2.

Filter cubicle and Drivers Desk are assembled and wired in-house.

STATIC EQUIPMENT & CONTACTORS  

CLW also undertakes manufacture of Smoothing Reactor (SL). Inductive shunt (SJ), Electro

Pneumatic/Electro Magnetic Contactors.

SHELL

  CLW undertakes complete manufacture of shell. The manufacture of shell involves major

fabrication works and CLW has complete facilities for undertaking the same. Recently, a modern

facility has been installed for grit blasting, spray painting and paint drying ovens for faster painting

of complete loco with polyurethanes painting process. This facility at a cost of Rs. 80 million has

been started from 18.11.2000.

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GEARS & PINIONS

It transmits traction power to the wheels.

SPRING

It is a suspension from axle to bogie and bogie to body. Suspension system minimise the shock caused by

vibration of the track and also carry weight of the loco body.

PANTOGRAPH

The Pantographs collect the power from the overhead 25 KV supply to the Loco.

VACUUM CIRCUIT BREAKER

It is protective circuit breaker of Locomotive for any abnormal situation in the Loco and

disconnects the loco from the supply.

HYDRAULIC DAMPER

To dampen the rebound rate of springs.

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ELECTRICAL PARTS

POWER CONVERTER

Power Converter converts single phase 25 KV AC supply into 3 phase AC with variable voltage (max. 2180 V) and variable frequency (65 to 132 Hz) and feed it to Traction Motor.

AUXILIARY CONVERTER

Auxiliary Converter converts single phase 1000 volts supply (from auxiliary winding of main transformer ) into three phase 415 volts (variable voltage variable frequency) to different three phase auxiliaries.

TRACTION MOTOR

There are total 6 traction motors in WAG-9/WAP-7 loco .TM 1-2-3 are mounted in bogie -1 and are fed from Power Converter 1 whereas TM 4-5-6 are fed from Power Converter -2. In case of WAP-5

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Loco there are 4 Traction motors in which Power Converter -1 feeds to TM-1-2 and Power Converter 2 feeds power to TM-3-4. Traction Motors are asynchronous squirrel cage Induction Motor. Power converter providing the power sources. All three traction Motors of one bogie are ventilated by one traction motor blower. Each traction motor is equipped with two temperature sensors and two motor speed sensors.

SPEEDOMETER

For indicating speed of the Loco memotel type speedometer is provided in both cabs. Speed is

indicated by needle as well as LCD screen of Speedometer.

TRACTION MOTOR BLOWER

It is a blower for ventilation of the Traction motors (connected with bogie 1&2) by forced air.

MAIN COMPRESSOR

It is a pressure creating equipment for necessary pressure for entire Pneumatic circuit of the loco.

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TRACTION POWER CIRCUIT

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AUXILIARY CIRCUIT DIAGRAM

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GALLERY

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