Chittaranjan Locomotive Works

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Chittaranjan Locomotive Works
IndustryElectric locomotive
FoundedJanuary 26, 1950; 69 years ago (1950-01-26)
FounderIndian Railways
HeadquartersChittaranjan, Asansol, West Bengal, India
Area served
ParentIndian Railways

Chittaranjan Locomotive Works is a Government electric locomotive manufacturer based in India. It is located at Chittaranjan near Asansol (District- Bardhaman West, State - West Bengal) with an ancillary unit in Dankuni. It is one of the largest locomotive manufacturers in the world under a single roof. Almost all electric locomotives running on Indian Railways are manufactured at CLW.

General Manager Office of Chittaranjan Locomotive Works (Bird's eye view)
WAP-5 LOCO with Aerodynamic & Ergonomic Design having capacity of 200 KMPH speed potentail
WAP-7 Loco AC coaching locomotive suitable for Hauling Mail/Express train and having 6000 HP, 140 KMPH, 20.5 axle load, 6 axle, energy Generation features
WAG-9H starting tractive effort of 51T, max speed 100KMPH, AC freight loco with crew friendly cab and energy regeneration features.
WAG-9HC, max speed 100 KMPH on 31st December 2018


Founded in 1950, the Indian Railways 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.

The 18.34 km2 (4,530 acres) township, which included the factory, 191 km (119 mi) of roadways, 43 schools, 9131 staff quarters, 8 clinics (including a 190-bed hospital) and 7 markets, was built at a cost of 140 million (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.[1]

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 (RPF), Railway Protection Special Force (RPSF) and also 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.[2] Chittaranjan Locomotive Works (CLW) started producing locomotives from the year 1950, the same year the township was formally established.Starting with steam engines, CLW now produces state-of-the-arts Electrical engines capable of running at 160 km/h and upgradable up to 200 km/h.



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

Traction Motors[edit]

I 3-PHASE TRACTION MOTOR TYPE 6FRA6068 & 6FXA 7059: 3-Phase Traction Motors type 6FRA6068 for WAG-9 and WAP-7 locomotives & 6FXA7059 for WAP-5 locomotive are being manufactured indigenously by CLW since the financial year 1998-99 & 1999-2000 respectively. With the production of 3-phase Traction Motor, CLW has entered the era of state-of-the-art,3-phase technology

II HITACHI TRACTION MOTOR TYPE HS15250A: Hitachi Traction Motor is one of the most critical and vital equipments in conventional Electric locomotives type WAG-7 & WAP-4 which were in production at CLW. The production of Hitachi is now completely stopped.

Record Production in 2018-19[edit]

In the financial year 2018-19, CLW produced a record 402 electric locomotives, working along with its Dankuni ancillary unit. CLW met that target on 31 March 2019, the last day of the financial year. This constituted a record for the largest number of electric locomotives manufactured in the country in a single year. Thus CLW became the largest Electric Locomotive producer in the World under a single roof and created History. Apart from this, CLW also assisted DLW/ Varanasi for producing Electric locos and DMW/ Patiala for producing Electric Locomotives by providing materials and technical expertise .

See also[edit]


  1. ^ Gudgin, D.S.E. (1976). Vulcan Foundry Locomotives 1832–1956. Truro: Bradford Barton. p. 93. ISBN 0-85153-215-2.
  2. ^ "About Chittaranjan Locomotive Works". Chittaranjan Locomotive Works.

External links[edit]

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