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History- page- 3



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 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). We repeated  the illustrious performance in the year 2009 and CLW was again conferred the Safety innovation award o­n 30.09.09.



CLW has continued its excellent performance and has been successful in producing  a record best number of 220 locos in 2009-10. CLW celebrated its Diamond Jubilee year  in 2009-10 .  The year saw a number of celebrations. 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  Diamond Jubilee year .  Few parks were also renovated in this year. 


         At present, CLW’s current Electric Locomotive production consists of only three phase locomotives namely  WAP-5, WAP-7 & WAG-9. The first CLW built 3 phase WAG-9 loco “NAVYUG” was rolled out of CLW on 14.11.1998, while the first CLW built 3 phase WAP-5 locomotive “NAVODIT” was rolled out on 17.05.2000. Further, CLW have developed 2 new types of 3 phase Electric Locomotive WAG-9H and WAP-7. The first WAP-7 locomotive “NAVKIRAN” was rolled out on 10.05.2000.Today, India is one of the select brand of countries who alone have the capability to manufacture the 3phase Electric Locomotive

            WAP-5, 5400 HP 25 KV 3-Phase Passenger Electric Locomotive

      This is a 5400 hp 25 KV AC 3-Phase 4 Axle, Broad Gauge (BG) WAP-5, mainline electric locomotive for haulage of passenger trains. Its speed potential on IR tracks is up to 160 km/h, with  designed speed potential of 200 km/h. This loco has an axle load 19.5 ton having Disk broke suitable for hauling Mail/Express and other super fast train. This is a state-of-art locomotive having 3-phase technology with computerized control system .

         WAP-7, 6000 HP 25 KV 3-Phase Passenger Electric Locomotive

This is a 6000 HP variant of WAG-9 to operate 24/26 coach trains at 130 km/h. Designated as WAP-7 Class, this locomotive is a clear preferred choice of operators for running long passenger trains, new passenger operation initiatives can be best met by this locomotive. This loco has an axle load of 20.5 ton suitable for hauling Mail/Express and other super fast trains .

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

This is a 6000 HP AC freight Loco with crew friendly AC cab and energy regeneration features. This loco has an axle load of 21.5 ton suitable for hauling heavy goods trains. This class of locomotive has a starting tractive effort of 51T, can attain max speed 90 kmph.


`1 )  1st Three Phase Electric Loco (loco no. 32146) fitted with Conventional Brake System turn out on 07.12.2018.

§  Sheds are conversant with maintenance practices è Ease in maintenance

§  Well established source for spares è Better availability of spares

§  Complete control over design è Easier fault diagnosis and trouble shooting

§  Standardized components/spares è Reduced inventory

                 §  Lower cost of the system è Cost economy

 2)    HOG enabled WAP-5 Locomotive (Loco no. 30140) using Composite Converter turned out on 09.06.2018.

§  Head on generation possible with WAP-5 locomotives too.

      Noise and pollution free

     Reduce dependency on fossil fuel (Diesel)

§  Propulsion with composite converter expected to saves around 0.7 crore.



3)  Aerodynamically designed WAP-5 (loco. No. 30164) with speed potential of 200 kmph turned out on 23.10.2018.


                      §  To reduce the air drag àless energy consumption and better acceleration

                      §  Increase the stability at higher speed

                      §  Ingeniously re-profiled the cab design and reduce the front facing angle

                      §  Reduced air resistance which particularly becomes critical at higher speeds.

4)    WAP-5 loco modified for Push-Pull operation. COCR done- Oct’18. Commercial run- Feb’19.

§  Total 12000HP(6000+6000) power

§  Crew required in master loco only

§  Low coupler forces à Reduced jerk

§  Better acceleration and de-acceleration

§  Reduction in total journey time

§  Less wear and tear at the curve


5) 1st WAP-7 locomotive (WAP-7HS loco no. 30750) with speed potential of 160 kmph turned out 28.02.2019.{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C} To facilitate operation of premium trains such as Rajdhani, Shatabdi and Duranto at higher speed.


6) Commissioning of WAG-9HH 9000HP locomotive (loco no. 90001) on 31.03.2019.

§  Better acceleration reserve at higher speed

§  Increased through-put

§  Increased line capacity

§  Right powering of trains

§  Possibility of improving speed potential



Chittaranjan Locomotive Works(CLW) achieved another milestone by rolling out 390 electric locomotives in only 264 working days in the FY 2020-21 on 31st March 2021. Shri Satish Kumar Kashyup, General Manager flagged off the 390th electric locomotive of WAG-9HC series bearing no. 33114 from CLW accompanied with senior officers, staff & supervisors.

In the first 6 months of F.Y. 2020-21 production was slow due to COVID related restrictions. The supply chain of material was inconsistent due to national and statewise lockdown and restrictions. Yet with proper planning and management, CLW revamped production from second half and continuously produced 40 + locos during last 6 months due to which production almost doubled in the second half of the year.





Source : Welcome to CLW Official Website ! CMS Team Last Reviewed on: 24-06-2021  

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