Chittaranjan Locomotive Works

Chittaranjan Locomotive Works is a Government electric locomotive manufacturer based in India. It is located at Chittaranjan in Asansol Sadar subdivision with an ancillary unit in Dankuni. It is the largest locomotive production unit in the world with a record of 431 locomotives produced in the year 2019-20 .[1] Almost all electric locomotives running on the Indian Railways are manufactured at CLW.

Chittaranjan Locomotive Works, Asansol
IndustryElectric locomotive
Founded26 January 1950; 70 years ago (1950-01-26)
HeadquartersChittaranjan, Asansol, West Bengal, India
ParentIndian Railways

WAP-7 Loco AC coaching locomotive suitable for Hauling Mail/Express train and having 6000 HP, 140 km/h, 20.5 axle load, 6 axle, energy Generation features
WAG-9H starting tractive effort of 51T, max speed 100 km/h, AC freight loco with crew friendly cab and energy regeneration features.
WAG-9HC, max speed 100 km/h on 31 December 2018


"Rolling Stock", is obviously the most essential requirement of a railway system. Though the railway system was introduced in India over hundred years ago, no systematic and large scale efforts were made to establish indigenous industry for meeting in full these basic requirements of Railways. The Indian Railways have, therefore, all along been dependent on imports for meeting their requirements of coaches, wagons locomotives and their components. A small beginning was no doubt made in the direction of locomotive manufacture in the East Indian Railway Workshop at Jamalpurm 1885 and in the Bombay, Baroda and Central India Railway Workshop at Ajmer in 1896. The manufacture of locomotives in these workshops was, however, of a sporadic nature and it only formed a side activity of these two workshops, which were primarily repair workshops.[2]

It was not unnatural, therefore, that Indian public opinion should have continuously demanded that arrangements be made for the manufacture of locomotives required for India’s needs in the country. The agitation became particularly strong after the First World War, when import of new locomotives became difficult and existing locomotives had either completely broken down through wear and tear involved during the war or were in a dismal state of disrepair. In the Legislative Assembly during the twenties of the present century, there was a furore of agitation by Indian leaders of all shades of opinion. No effective steps were, however, taken by the Railway authorities to enlarge the scope of locomotive manufacture at Jamalpur and Ajmer. Various practical difficulties were pointed out and reasons plausible and otherwise were advanced in favour of continuing the existing practice of importing locomotives from Britain. The conclusion could not be easily escaped that in this matter, as in many others, those in charge of the Railways at the time, were more interested in the welfare and prosperity of British industries, and preferred to extend the patronage of Indian Railways to British locomotive factories, rather than taking steps towards developing this industry in India.[3]

Srinivasan CommitteeEdit

Finally in July, 1939 a committee was appointed consisting of a Mechanical Engineer and Finance Officer, Mr. J. Humpherey and Mr. K. C. Srinivasan respectively to examine in detail the scheme of starting the manufacture of locomotives in some of the existing workshops in India and to report on the initial cost and financial implications of such a venture. The Committee, however, recommended that the manufacture of locomotives, despite the war and even because of it, should be taken up at once. steps were taken to implement the recommendations oif the Committee. During the war, the shortage of locomotives became more and more apparent. This only served to emphasise the urgency and the imperative necessity for India to become independent and self-sufficient in respect of locomotives and other equipment necessary for railway operation.[4]

It was not till 1945 that any serious consideration was even to the recommendations of the Srinivasan Committee. A provisional site at Chandmari in the then undivided Bengal was selected. Not much progress could be made at this site, because of political changes leading to the partition of India. In 1947, the present site, where the Chittaranjan is located, was finally chosen.

Location of the ProjectEdit

Selection of siteEdit

Chittaranjan is ideally located for an industrial undertaking of this nature. It is situated within 15km of West Bengal’s rich coal belt and only 10 km from the Maithan Dam of the Damodar Valley Corporation from where Hydro-Electric energy will be obtained. The Maithon reservoir will also provide a source of perennial water supply for the township and the workshop. The hilly nature of the country facilitates easy drainage, so important for the establishment of a clean, healthy township and the excellent climatic conditions are expected to ensure a high level of labour attendance and efficiency. Workshop and the colony are spread over an area of over 18 square kilometres.[5]


Chittaranjan has 5,070 residential quarters, 115 km of road, ~200 km of piping for water supply and 160 km of water borne sewage. Every single house has a minimum of two rooms, verandah and courtyard, electricity, continuous supply of filtered water, its own sanitary pi’ivy and batii. Each house in Chittaranjan has been provided with the basic facilities of a modem home. The township has been planned in separate colonies of composite self-sufficient units, each of which has its shopping centre, maternity clinic, school, playground, dispensary, park, social amenity and recreation centres. There are at present in Chittaranjen 5 dispensaries, 4 maternity and health centres. 7 basic schools, 4 community halls and 6 parks. The main hospital has 50 beds and is centrally situated to provide medical facilities for all residents of the township. Two high schools, one for boys and the other for girls, provide secondary education to the young inhabitants.[6]

Water supplyEdit

The principal source of water supply at present is the AjaiRiver, a slender hill stream, wlilch passes around the township. As the river gets dried up during the three dry months of April, May and June, an artificial lake with a capacity of 163,60,00,000 litres has been built by constructing a 1,600 ft. long and 40 ft. high dam across one of the main out-fall streams to tide over the summer months. At present, a sub-merged dam across the Ajai leads water through a sealed channel into an intake well and thence to the filter beds in the centre of the township with a capacity of 90 lakh litres per day.[7]

Power SupplyEdit

Electricity was first generated by a number of small portable plants. Subsequently, when the three 600 kW thermal standby sets were ready, energy was obtained from these, and in December, 1950, when the D.V.C. temporary packet sets at Kamardhubi were brought in, power was obtained from there at 11 kV 3-phase, 50-cycle A.C. Since January, 1952, power is being supplied from Sindri at 33 kV over D.V.C. grid. The Committee imderstand that of the three 600 K.W. thermal standby sets, one has been released to the N.E. Railway, Gorakhpur, and until the D.V.C. supply is guaranteed, it is not proposed to release the balance


Chittaranjan Locomotive Works was founded in 1950, the Indian Railway production unit is named after the Indian freedom-fighter Chittaranjan Das. The manufacturing unit was established at a place close to the Chittaranjan railway station, Asansol, West Bengal.

The 18.34 km2 (4,530 acres) township, which included the factory, 191 km (119 mi) of roadways, 43 schools, 9,131 staff quarters, 8 clinics (including a 190-bed hospital) and 7 markets, was built at a cost of 14 crore (US$2.0 million) and had a population of over 80,000.[citation needed]

The factory commenced the production of steam locomotives on 26 January 1950 (the date when India formally declared itself a Republic), in collaboration with the North British Locomotive Company. On 1 November 1950, Indian President Dr. Rajendra Prasad formally dedicated the first steam rail-engine produced by the company (a WG class locomotive bearing the registration number 8401) to the freedom fighter Deshbandhu Chittranjan Das. The name of the nearby railway station Mihijam was also changed to Chittaranjan. Many of the specialized machinery required for steam locomotive manufacture was obtained from the Vulcan Foundry in England, previously a major supplier of locomotives to India, which at this time was moving from building steam locomotives to diesel.[8]

In the post-1968s, the factory began to manufacture diesel-hydraulic locomotives. The production of steam and diesel locomotives were discontinued in 1972 and 1993 respectively. The company has since been manufacturing only electric rail-engines. It is now the only government electric loco producing factory in India.

The factory obtains its iron & steel from different steel plants of SAIL, RINL & MDN, and sometimes from private steel plants like TATA, Jamshespur or Jindal Steel etc. and hydel power from PGCIL and DVC (Maithan dam). The township under CLW is bordered by high boundaries and 3 main gates, and guarded by Railway Protection Force, Railway Protection Special Force and the West Bengal police.


The planners of the nation with their prudence planned to set up a loco building factory in the eastern part of the country. In the late 1930s, a committee consisting of M/s Humphries and Shrinivasan was constituted to consider the possibility of establishing a locomotive manufacture unit and its economic facilities. The initial project at Chandmari, a place east to Kalyani in the state of West Bengal, could not mature due to partition, which inevitably necessitated a change of site. This present site at Chittaranjan was chosen after a fresh survey and for this the approval of Railway board was obtained in 1947.[9] The Railway Board decided to locate the factory at Chittaranjan, near Mihijam.  On the 9thof January 1948, survey of the proposed area was commenced. 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 which envisaged hydro-electric and thermal power stations in the vicinity assured adequate power availability for the enterprise..

The locoworks originally called Loco Building Works was initially established for production of 120 average sized steam locomotives with the capacity to manufacture 50 spare boilers. Production of steam loco commenced on 26 January 1950. The first President of India, Dr. Rajendra Prasad dedicated the first steam locomotive to the nation on 1 November 1950 and on the same day the Loco Building Factory was rechristened and  named after the great Patriot, Deshbandhu Chittaranjan Das and became Chittaranjan Locomotive Works. Apart from meeting the growing and varied needs of Indian Railways, CLW has been right from inception, adopting modern designs and upgrading technology, gradually enhancing the haulage capacities and speeds of locomotives.

It is the only major Electric Locomotive manufacturer in the country. It is situated 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 collection 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 and the township is spread over an area of 18.34 Sq. Km.

Chittaranjan Locomotive Works (CLW) started producing locomotives from the year 1950, the same year the township was formally established. The approximate value of the imported parts required for the manufacture of locomotives at the Chittaranjan Locomotive Works is Rs. 1,25,000 per locomotive in the year 1955.[10]

Starting with steam engines, CLW now produces state-of-the-art Electrical engines capable of running at 160 km/h and upgradable up to 200 km/h.

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 was 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-9i and passenger locomotive WAP-7. Pandit Jawaharlal Nehru, the first Prime Minister of India, commissioned the first 1500 V dc Locomotive named 'LOKMANYA' on 14 October 1961. The production of 25 kV AC DC loco commenced on 16 November 1963. The first Electric Loco turned out from CLW, named 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.

CLW became the first production unit in the developing countries, second in Asia and fifth in the world to manufacture, state of the art, 3-phase GTO Thyristor controlled Electric Locomotive and the first indigenous 6000 hp freight electric loco WAG-9. This was  christened as /NAVYUG/  and was turned out on 14 November 1998. During the year 2000-01 the first passenger version of three phase loco WAP-5  'NAVODIT', with maximum service speed of 160 km/h and having a potential upto 200 km/h, was manufactured. Development of sources, indigenisation and cost reduction of three-phase loco have been the highest priority items. The cost of 3 phase loco has been drastically brought down from a high of Rs. 35 crores for imported locos to about Rs.13.5 crores. It is hoped that this will further be reduced, if the number of such locomotives manufactured by CLW is increased.

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.

Long before others became environment conscious, CLW administration started planting trees, thus turning an arid area into a green one. In 1996 alone 90,000 saplings were planted with the help of the Social Forestry Division of Government of West Bengal. In 2005 also 50,000 saplings have been planted with the help of same agency. The Administration is regularly educating the staff and encouraging them to preserve the environment. Recently, an immense amount of work has been done, with a view to conserve the Environment, as well as using of all the existing natural resources in an eco-friendly manner. The efforts have been recognized by the World Environment Foundation and the Golden Peacock award for Environment Management 2006, has been conferred on 9 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 6 September 2006 by the Safety and Quality forum of the Institute of Engineers (India). We repeated  the illustrious performance in the year 2009 and CLW was again conferred the Safety innovation award on 30.09.09.

Milestones of Chittaranjan Locomotive WorksEdit

Timeline of C.L.W
1947 September Site for Chittaranjan Locomotive Works located.
1948 March Construction work started.
1948 April Workshop Set up
1950 26 January Production inaugurated by Smt. Basanti Devi, Wife of Late Chittaranjan Das.
1950 1 November Namkaran Ceremony of the works by President of India, Dr. Rajendra Prasad, when the first steam locomotive was turned out and flagged off from CLW.
1951 12 February KG Hospital formally opened by his Excellency Dr. K.N.Katju, Governor of West Bengal.
1952 1 to 2 March Prime Minister of India, Pandit Jawaharlal Nehru visits Chittaranjan accompanied by Dr. B.C.Roy, Chief Minister of West Bengal
1952 21 October Railway Minister  Shri Lal Bhahadur Shastri visits Chittaranjan
1953 10 October Dr. Sarvapalli Radhakrishnan, Vice President of India, visits Chittaranjan .
1954 6 January 100th Steam Loco "CHITTARANJAN 100" inaugurated by Railway Minister Shri Lal Bahadur Shastri.
1955 27 April Dr. Rajendra Prasad, President of India, drove the 200th Locomotive from the works.
1955 28 November Visit of their  Majesties the King ,Tribhuvan Bir Bikram Shah  and Queen of Nepal
1955 17 December Visit of their excellencies Mr. N.A.Bulganin and Mr. N.S.Khruschev from Russia
1956 14 November Visit of His Imperial Majesty, Mr. Haile Selassie, Emperor of Ethiopia
1956 12 December Visit of Mr. Chou en lai the Prime Minister of People’s Republic of China
1957 13 January Visit of their Holinesses , the Dalai Lama and the Panchen Lama
1958 18 March Visit of Mr. Churu Stoika, Prime Minister of Rumanian People’s Republic
1958 20 November Visit of Mr. Marcel Roberts, Chief Occupational Safety & Health Division, International Labour Organisation
1960 25 January A technical collaboration agreement signed with Messrs. F.H.Lloyd & Co. Ltd., Wednesbury for establishing the Steel Foundry at Chittaranjan
1960 16 April Thousandth Locomotive turned out.
1960 April Visit of Mr. Gamal Abdul Nasser, the President of the United Arab Republic
1961 January Steel Foundry set up
1961 2 February Visit of the illustrious daughter of Netaji Subhash Chandra Bose, Kumari Anita Bose
1961 16 April Opening of Rabindra Manch and open air theatre.
1961 14 October First CLW built WCM-5 DC Electric Loco "Lokmanya" commissioned by Pandit Jawaharlal Nehru.
1962 October Electric Loco Shop Set up
1963 16 November First CLW built WAG-1 25 KV AC Electric Loco "Bidhan" commissioned by Pandit Jawaharlal Nehru.
1966 Traction Motor Shop Set up
1967 16 April Chittaranjan builds its First Traction Motor, the largest in India, at that time.
1968 6 January First CLW built Diesel Hydraulic Shunter "INDRAPRASTHA" commissioned by Shri C.M.Poonacha, the then Railway Minister.
1971 Antim Sitara last steam engine
1972 First batch of TAO-659 traction motor despatched
1972 30 January First CLW Built WCAM-1 AC/DC Dual Voltage electric Locomotive "Vallabh"commissioned by Shri Sidhartha Shankar Ray, the then Chief Minister of West Bengal.
1980 1 October First Rajdhani Electric Loco WAP-1 commissioned.
1985 3 - 4 July Flagging off of the 600th Diesel Loco MOHANDAS by Shri Madhav Rao Scindia, Minister of Railways
1986 2 Nov. Visit of Professor Nurul Hassan, Governor of West Bengal
1987 6 April "JAWAHAR" (WAP-3) commissioned and christened by Shri Madhav Rao Scindia, Minister of State for Railways for Shatabdi Express services.
1988 April First batch of Hitachi traction motors despatched
1989 May Collaboration agreement signed with Rockwell International Corporation .
1990 31 March 105th Electric Loco KIRTIMAN inaugurated by Mr. R.D.Kitson, Member Mechanical, Railway Board
1991 7 January Flagging off of 1500th Electric loco SUKANYA, to mark the International year of the girl child
1992 3 August 1st 5000 hp High Adhesion WAG – 7 Electric Locomotive "SHANTIDAN" christened by Mother Teresa, Missionaries of Charity.
1993 6 April Last BG Diesel Shunter "VIRAM" of the year and NG Diesel Locomotive "ITI" of the year 1992-93.
1993 11 June Inauguration of "Sidhu kanu Setu" a light bridge over the River Ajoy by R.K.Shukla, GM/CLW
1994 23 January WAP-1 Electric Loco "PRAGATISHEEL" provided with Hitachi Traction Motor.
1994 27 August First 5000 hp WAP-4 Passenger Locomotive "ASHOK" flagged off.
1996 13 July ISO-9001 certification awarded to Loco Works by IRQS.
1996 8 August ISO-9002 certification awarded to Steel Foundry by IRQS.
1996 14TH Sept First Modular WAG-7 Loco KARAMVIR Flagged
1996 27 Dec First 3 phase 6000 hp WAG-9 Locomotive (CKD/SKD) flagged off from CLW.
1998 29 April Flagging off of 2500th Electric loco SWARNA ABHA by the Shri Nitish Kumar,Hon’ble MR
1998 14 Nov WAG-9, the first CLW built indigenous 3 phase state-of-the-art 6000 hp Freight Electric Locomotive "NAVYUG" inaugurated by the Hon’ble Minister for Railways by Shri Nitish Kumar.
1998 21 Nov Inauguration of one WAG-7 500 HP Electric Loco SAMARPAN by Shri Jyoti Basu Chief Minister of W. Bengal
1999 10 Jan First batch of 6 nos. of CLW built 1000 hp Traction Motors for WAG-9 inaugurated by Shri K.Balakesari, Member Staff.
1999 12 April Flagging off of NAVJYOTI by  His Excellency the Governor of West Bengal Mr. A.R.Kidwai
2000 25 January CLW completes 50 years of service to the nation
2000 24 February The first CLW built 3-phase traction motor type 6 FXA-7059 for WAP-5 locomotive inaugurated.
2000 10 May "NAVKIRAN" the first WAP-7 locomotive rolled out of CLW.
2000 17 May "NAVODIT" the first CLW built WAP-5 locomotive rolled out of CLW.
2000 30 June A first Day Cover on CLW released by Shri M.K.Banerjee, Post Master General/Kolkata to commemorate CLW Golden Jubilee (Phase-II).
2000 30 June "NAVSHAKTI" the first WAG-9H locomotive was rolled out of CLW.
2000 18 November Commissioning of a new facility for polyurethane painting of Electric Locomotives with grit blasting and paint drying oven facility.
2001 12 February "NAVBHARATI", the second CLW built WAP-7 locomotive flagged off by the Hon’ble Minister of Railways Ms. Mamata Banerjee.
2001 16 April H.E.Viren J.Shah, Governor of West Bengal was the chief Guest at the 46th Railway Week function. H.E. also flagged off the 3-phase WAG-9 loco christened "NAVASHA".
2001 31 May "NAVJAGRAN", the CLW built WAP-5 locomotive flagged off by the Hon’ble MOSR (D) Shri Digvijay Singh.
2002 26 April ISO-14001 certification awarded to CLW by IRQS.
2003 6 April "NAVCHETAK" the CLW built WAP – 7 type Locomotive flagged off by Hon’ble MOSR(A) Shri A.K.Murti.
2003 2 & 3 August "NAVGHANSHAKTI" the CLW built WAG-9 type locomotive flagged off by ML/RB,Shri S.C.Gupta.
2003 25 Sep ISO-9001-2000 certification awarded to CLW for quality Management system.
2003 28 October Shri Nitish Kumar,Hon’ble MR inaugurated a book published by the PR Dept. entitled "STORY OF CLW" written by Shri R. K.Vir, Ex-GM/CLW at Railway Board, New Delhi.
2004 10 January "NAVGATI", the CLW built WAP-7 locomotive flagged off by Addl. ML/RB.
2004 29 March "YUGANTAR", the CLW built WAP-4 loco flagged off by GM/CLW.
2005 February Manufacturing of Cast Steel Bogie Frame for DLW for GM Loco WDS-4 by Steel Foundry
2006 9 June CLW is conferred with the Golden Peacock award for Environment Management by the World Environment Foundation
2006 29 July CLW built new locomotive type WAG-9 & WAG-9H with Satellite Remote Diagnosis System "Dr.  Silver" inaugurated by Shri Laloo Prasad, Hon’ble MR.
2006 6 Sept CLW becomes the proud recipient of the  Safety innovation award 2006, by the Institute of Engineers
2007 23 March Flagging off of 100th WAG-9 loco "NAVPRAGATI".
2007 31 March 1st loco for 2007-08 inaugurated
2007 31 March 1041st Traction Motor produced for the year 2006-07
2008 25 May CLW website launched
2008 11 July CLW adopts ORACLE based financial application
2009 26 January CLW steps into its Diamond Jubilee year
2009 30 Sept CLW is again conferred the Safety innovation award, by the Institute of Engineers
2010 4 January CLW hosted the 66th All India Railway Football Championship(Knock-out round) in Chittaranjan
2010 16 April Inauguration of 2nd IGBT based locomotive WAG-9i
2010 1 May CLW bagged the Gold medal in the 30th ALL India Archery Competition.
2010 3 June Indian railways first HOG scheme loco produced in CLW/Chittaranjan.
2010 4 October Inauguration of first fully IGBT based three phase locomotive.
2010 19 Nov All India Railway Bridge Championship held in Chittaranjan
2010 14-  27 Nov’ CLW took part in India International Trade Fair (IITF)2010 which was held in New Delhi at Pragati Maidan
2011 1 February Flagging off of three phase loco fitted with AC Cab produced by CLW
2011 25 February Visit of Japanese delegation to CLW
2011 30 March Visit of Member Electrical /Railway Board to CLW
2011 18 Nov Visit of Member Electrical / Railway Board to CLW.
2011 15 Dec. 2011 13th All India Railway Archery Championship held in Chittaranjan
2012 5 - 12 Feb. All Inter Railways Football Championship in CLW
2012 11 July Record production of Elect. Locomotives in CLW (258 nos.)
2012 11 July CLW achieved a milestone by turning out a 3 phase locomotive equipped with IGBT based propulsion system and TCN compliant VCU.
2012 19 July Visit of Member Electrical/Rly. Board to CLW
2013 5 March All India Rly Bridge Championship 2012-13 in CLW
2013 31 Mar Record production of Elec. Loco in CLW - 270 nos.
2013 March Best ever production performance in first quarter.
2013 24-Jun Inauguration of Ventilator Machine in KG Hospital /CLW.
2013 17-Jul inauguration of new CNC Vertical Torret Lathe Machine
2013 17-Jul inauguration of new Auto-Analyzer Machine in KG Hospital/CLW
2013 14-Aug Production & flagging off of 100th Locomotive of the year2013-14 in CLW
2013 9 Sept Visit of Member Electrical/Rly. Board to CLW
2013 18 Dec 4th All India Rly. Archery Championship in CLW
2014 1 March Visit of Addl.Member (Electrical)/Rly. Board to CLW
2014 5 April Visit of Adviser (Rly.Stores)/Railway Board to CLW
2014 11 April Inauguration and flagging off of first locomotive(WAG-7 type No.28667) of the year 2014-15 in CLW.
2014 22 April Visit of Member Engineering/Railway Board to CLW.
2014 2013-14 Best  Ever 137  Three Phase Loco Production  Of  CLW
2014 18 July Visit of   Member Electrical , Railway  Board   to CLW
2014 11 - 20 Oct CLW archers won  Bronze  medal at 70 -meter team event in the 35th  Senior  National Archery Championships,  held   at  J. L. Nehru Stadium, New Delhi .
2015 28 to 31 Jan West Bengal State Ranking Junior Badminton Tournament in CLW.
2015 21 Feb Visit of Addl. Member Railway Stores (AMRS)/Railway Board to CLW
2015 20 Mar Inauguration of new Stores Shed in CLW on 20 March 2015.
2015 5 May Chittaranjan  Locomotive Works (CLW)  got   OHSAS  18001 certification. from  certifying agency , M/s Certification Services Pvt Ltd .
2015 7 Aug Inauguration of last WAG-7 Shell in CLW
2015 10 Sep Visit of delegation of Raniganj Chamber of Commerce to CLW
2015 23 Nov Vendor Development and Buyer seller Meet in CLW
2015 2 Dec Visit of Member Electrical/Rly. Board to CLW
2015 6 Dec 47th All India Railway Cross country Championship in CLW
2015 28 Dec Visit of Financial Commissioner/Rly. Board to CLW
2016 20 Jan Starting of distribution of Energy Efficient LED Bulbs in CLW
2016 27 Jan CLW Staff Gets President’s Medal
2016 4 Mar Inauguration of New Loco piping shed and cable harness section in CLW
2016 8 Mar Rolls out first locomotive in CLW’s ELAAU, Dankuni
2016 1 July Visit of Member Electrical, Railway Board to Chittaranjan Locomotive, Works(CLW) and inauguration of the 25th Hotel Load Loco WAP-7 type(30482)
2016 2 July Member Electrical, Railway Board visited Electric Locomotive Assembly & Ancillary Unit (ELAAU) at  Dankuni  of Chittaranjan Locomotive Works (CLW) The   first   loco  of  the   year    2016-17,  WAG-9H type ( 31751 ) was ceremonially flagged off .  
2016 25 July Member Mechanical, Railway Board and Ex-Officio Secretary to Govt. of India visited CLW and 750th WAG-9H  freight locomotive (31763)  was ceremonially flagged off
2016 9 Sept Shri Rajen Gohain, Hon’ble Minister of State for Railways, Govt of India , dedicated the Electric Locomotive Assembly & Ancillary Unit at Dankuni (ELAAU-Dankuni) of CLW to the Nation by remote through video conference.
2016 21 October "IROCON 2016 " - 17TH CME & 10TH Annual Conference of  IROPA held in  CLW
2016 21 October Junior Vikas  Shivir  Organised  in  CLW.
2016 7 November 73rd All India Railway Football Championship held  in CLW( knockout )
2017 28 January Hindustani Sangeet Samagam by Chittaranjan Locomotive Works (CLW) Cultural Association was organised
2017 2 to 4 March Inter Railway Cultural Music competition held in CLW
2017 25 March Inauguration of Bulk Messaging System in CLW
2017 28 April 700th IGBT technology based Electric Loco WAG-9H (31871) was ceremonially flagged off by Shri Ghanshyam Singh, Member Traction, Railway Board and Ex-Officio Secretary to Govt. of India during his visit to CLW
2017 20 May 900th WAG-9H freight loco (no.31900) was flagged off by Shri Rajen Gohain,  Hon’ble Minister of State for Railways during his visit to Chittaranjan Locomotive Works.
2017 1 June Inauguration of Water Closet system in WAG-9H loco by Shri V P Pathak, GM,CLW
2017 27 Nov. CLW became first Production Unit of Indian Railways to join Integrated Material Management System (IMMS) platform. The system was formally inaugurated by Shri V. P. Pathak, G.M. on 27 November 2017.
2017 13 Dec. Visit of MTR to CLW Shri Ghanshyam Singh,WAG-9H-32101 with wireless  loco flagged off
2017 27 Dec. Visit of DG/RS to CLW, Shri A.K.Goel
2018 16-Jan ISO 50001 awarded to CLW
2018 6 Mar. Maiden Diesel loco WAGC-3-001 conversion  by CLW
2018 7 Mar. 300th loco WAG-9H -32092 from DKAE unit flagged off
2018 8 Mar. All Women’s Employees Cell created in Traction Motors Shop on International Women’s Day
2018 21 Mar. CLW surpasses the loco target by sending 325th Electric Loco of 2017-18 much before the closure of financial year.
2018 1 April "CLW produces record  350 electric locomotives of  2017-18"
2018 19  April "CLW receives Best Production Unit Shield award from Railway Minister"
2018 24 Oct. "CLW  produces  first loco WAP-5 with aerodynamic design capable to run at 200 kmph"
2018 25 Dec. 9800th loco inaugurated in CLW
2019 17  Jan. installation of 100Ft high mast monumental  National Flag in Ganga Boat Club
2019 7 Feb. inauguration of Archery Hostel & Renovated Tennis court
2019 7-9 Feb. 9th All India Rly Archery Champiuonship 2018-19 organised in CLW
2019 19 Mar. CLW Football Team became Winners of  75th All India Rly Football,  Championship held at Maligaon
2019 20 Mar. Inauguration of New Open Gym in Park near S P East market
2019 31 Mar. 402nd  loco from CLW  flagged off by Shri Ghanshyam Singh, MTR & Shri Praveen Kumar Mishra, GM, CLW
2019 31 Mar. 9000 HP first loco from CLW   flagged off by Shri Ghanshyam Singh, MTR & Shri Praveen Kumar Mishra, GM, CLW
2019 2 July CCTV surveillance system in K G Hospital inaugurated by General Manager
2019 3 July AEBAS in CLW workshop inaugurated by General Manager
2019 11 July Astronomical Timer based Street Light Automation inaugurated by General Manager  
2019 14 July CLW participated in exhibition on 14-7-19 at Ranchi in connection with 64th Railway Week National Awards function, 2019 .
2019 12 Aug. 100th Locomotive from ELAAU/Dankuni inaugurated by  General Manager
2019 12 Aug. Successful trial run of CLW built WAP-7 loco at 180 kmph by Kota division.
2019 23-25 Aug. CLW participated in the"6th India International MSME Startup Expo &  & Summit-2019" at New Delhi
2019 15 Oct 200th Loco for the year 2019-20 rolled out in record 158 Days.
2019 1 Nov Haemodialysis Treatment Facility Commissioned in KGH.
2019 7-9 Nov 10th All India Railway Archery (M&W) Championship organised in CLW.
2019 18 Dec CLW has been adjudged second by the NECA (National Energy Conservation Award) of BEE..
2019 21 Dec 300th Loco for the year 2019-20 rolled out in record 216 Days.
2020 31 Jan 350th Loco for the year 2019-20 rolled out in record 250 Days.
2020 1 Jan CLW produces 446 locos in the calendar year 2019.

Manufactured LocomotivesEdit

No. Year Total withdrawn BG Loco Cost MG Loco Cost
1 1951-52 17 - -
2 1952-53 33 7[11] 5.35 Lakhs 3.35 - 3.50 Lakhs [12]
4 1953-54 64 - -
5 1954-55 98 - -
6 1955-56 129 - -
8 1956-57 156[13] - -
9 1957-58 135[14] - -



   Loco currently in production

Diesel locomotivesEdit

Name Wheel




Built year(s) Power Current Status Preserved units Comments Image
WDS-4 C 27 1968-1969 600 HP Few are still in service 4 A few still in service  
WDS-4A C 5 1968 660 HP Retired  
WDS-4B C 450 1969 700 HP Retired  
WDS-4C C 7 1976-78 700 HP Retired  
WDS-4D C 120 1984-97 700 HP Retired  
WDS-8 Bo-Bo 5 1979-1982 800 HP Retired  
YDM-2 B-B 41 1986-90 700 Retired  
ZDM-3 B-B 40 1970-82 700 In service  
ZDM-4/4A 1-B-B-1 10/39 1975-77/1982-90 700 In service  
ZDM-5 B-B 41 1989+ 450 In service  
NDM-5 B-B 11 1987-89 450 In service

Electric locomotivesEdit

Name Wheel




Built year(s) Power Current Status Preserved units Comments Image
WAM-4 Co-Co 500 1970-1983 3850 HP Retired 6 Earmarked  
WAP-1 Co-Co 77 1980-1996 3900 HP In service 1 Earmarked  
WAP-3 Co-Co 9, all rebuilt from WAP-1 1987-1988 3900 HP Retired/ In service as WAP-1 None  
WAP-4 Co-Co 778 1993-2015 5350 HP In service  
WAP-5 Bo-Bo 198 1995– present 6000 HP In service  
WAP-6 Co-Co 16 1997 5350 HP Retired/ In service as WAP-4  
WAP-7 Co-Co 1070 2000– present 6350 HP In service  
WAG-1 B-B 112 1963-1966 2930 HP Retired 1 unit  
WAG-3 B-B 10 1965 3300 HP Retired None
WAG-4 B-B 186 1966-1971 3590 HP Retired None
WAG-5 Co-Co 1196 1978-1998 4360 HP In service 1 unit  
WAG-7 Co-Co 1970 1992 5350 HP In service 1 unit earmarked   
WAG-9 Bo-Bo 1848 1996–present 6125 HP In service  
WCM-5 Co-Co 21 1961-1963 3700 HP Retired 1 unit  
WCM-6 Co-Co 2 1995 5000 HP In service Converted to 25 kV AC operation
WCG-2 Co-Co 57 1970-1976 4200 HP Retired 2 units  
WCAM-1 Co-Co 54 1975-1979
  • 2930 HP DC
  • 3640 HP AC
Retired None First mainline with AC/DC electric locomotive and the only Indian electric loco with reversed pantographs  


  • WAP-7: 6000 hp, 25 kV AC, Indian Gauge, passenger locomotive, 140 km/h, 3-phase IGBT based technology
  • WAP-5: 5450 hp, 25 kV AC, Indian Gauge, passenger locomotive, 160 km/h / 200 km/hr, 3-phase IGBT based technology
  • WAG-9H: 6000 hp, 25 kV AC, Indian Gauge, freight locomotive, 100 km/h, 3-phase IGBT based technology
  • WAG-9HH: 9000 hp, 25 kV AC, Indian Gauge, freight locomotive, 100 km/h, 3-phase IGBT based technology

Traction motorsEdit

  • I 3-phase Traction Motor Type 6FRA6068 and 6FXA 7059: 3-Phase traction motors type 6FRA6068 for WAG-9 and WAP-7 locomotives and 6FXA7059 for WAP-5 locomotive are being manufactured indigenously by CLW since the financial year 1998-99 and 1999-2000 respectively.
  • II Hitachi Traction Motor Type HS15250A: Hitachi traction motors are conventional electric locomotives types WAG-7 and WAP-4 which were in production at CLW. The production of Hitachi is now completely stopped.

See alsoEdit


  1. ^ "Chittaranjan Locomotive Works is now world's biggest locomotive producer". The Statesman. 2 April 2019. Retrieved 12 September 2019.
  2. ^ page 8
  3. ^ page 9
  4. ^ page 10
  5. ^
  6. ^
  7. ^
  8. ^ Gudgin, D.S.E. (1976). Vulcan Foundry Locomotives 1832–1956. Truro: Bradford Barton. p. 93. ISBN 0-85153-215-2.CS1 maint: ref=harv (link)
  9. ^ "About Chittaranjan Locomotive Works". Chittaranjan Locomotive Works.
  10. ^ page 27
  11. ^ Page no. 41
  12. ^
  13. ^ page 30
  14. ^ page 37

External linksEdit

Coordinates: 23°51′32″N 86°54′40″E / 23.85891°N 86.91111°E / 23.85891; 86.91111