Mixed type locomotives:WDM 1 (First mainline diesel electric locomotives used in India. Introduced in 1957. Imported from ALCO. Out of service now. 1950 hp)WDM 2 (Most widely used and first homemade mainline diesel-electric locomotives in India. Original prototypes were made by ALCO. Introduced in 1962. More than 2700 have been made. Rated at 2600 hp)WDM 2A, (Technical variants of WDM 2)WDM 2BWDM 3 (Only 8 were imported. They used hydraulic transmission and are currently non- functional)WDM 3A (Formerly WDM 2C. Another WDM 2 variant. It is not related to WDM3. 3100 hp)WDM 3C, (higher powered versions of WDM 3A)WDM 3DWDM 4 (Entered service along with WDM 2. Prototypes designed by General Motors. Though considered superior to WDM 2 in many ways, these locomotives werent chosen as General Motors did not agree to a technology transfer agreement. 2600 hp)WDM 6 (Very rare class; only two were made; one is being used by Puttalam Cement Factory in Sri Lanka. Rated at 1200 HP)WDM 7 they were designed for branch-line duties, but they are now used mostly for shunting. Rated at 2000hpWDM 5 No locomotive class was designated as WDM5 in India.Passenger Locomotives:WDP 1WDP 2 (New class name WDP 3A. Dedicated passenger diesel locomotive. Entered service in 1998. Powerful locomotive. 3100 hp)WDP 3 This locomotives are actually prototypes of the class WDP 1 and never entered serial productionWDP 4 EMD (former GM-EMD) GT46PAC, fundamentally a passenger version of the WDG 4 (GT46MAC). 4000 hpWDP 4B EMD (former GM-EMD) GT46PAC, An improved version of the WDP 4, this is a more powerful version and has 6 traction motors, just like the WDG 4. Also comes with wider cabin to aid visibility and minor exterior design changes. 4500 hpWDP 4D EMD (former GM-EMD) GT46PAC, This is basically a WDP 4B with twin cabs. Minor changes were made to the locomotive to facilitate the addition of a second cabin. This locomotive comes with LCDinstrument display and toilet for the drivers. As of now, two units have been made and are expected to enter full-time service soon. 4500 hp.
Goods locomotives:WDG 2 New class name WDG 3A. These class is actually a technically upgraded form of WDM 2WDG 3B, Technical upgraded forms of WDG 2 or WDG 3AWDG 3C,WDG 3DWDG 4 New dedicated goods locomotives. These are General motors GT46MAC models. First units were imported in 1999. They are numbered from #12000 upward. Local production started on 2002. 4000 hpShunting locomotives (Also known as switching engines):WDS 1 First widely deployed and successful diesel locomotives used in India. Imported in 1944- 45. Currently out of service. 386 HPWDS 2 Currently out of serviceWDS 3 All locomotives of this class were rebuilt and reclassified as WDS 4C in 1976-78. 618 HPWDS 4, Designed by Chittaranjan Locomotive Works. 600-700 hpWDS 4A,WDS 4B,WDS 4DWDS 4C Rebuilt WDS 3 locos as mentioned aboveWDS 5 Some of these locomotives are used for industrial shunting. A few are used on Indian Railways. Rated at 1065hpWDS 6 Heavy-haul shunters made in large numbers for industrial concerns as well as for Indian Railways Rated at 1200/1350hpWDS 8 Only five of these were made, and all were transferred to steel works 800hpNote: There is no electric shunting engine in India. Classes from WDS 1 to WDS 4D have hydraulictransmission. The WDS 4, 4A, 4B, 4C and 4D are the only still existing broad gauge locomotives withdiesel-hydraulic transmission.Diesel multiple units:A few routes in India currently have Diesel multiple unit service. Depending on the transmission systemthey are classified as DEMU (diesel-electric transmission) or DHMU (diesel-hydraulic transmission).There are diesel railcar services in a few places known as railbus.DC electric tractionNote: These locomotives are, or were used only in sections around Mumbai which is the only location inIndia still using DC traction.The power operated is 1500V DC.
Mixed type locomotives:WCM 1 First electric locomotives with the now familiar Co-Co wheel arrangement to be used in India. 3700 hpWCM 2 520hpWCM 3 600hp - Used in Kolkata , then transferred to Mumbai, Built by HitachiWCM 4 675hp - Also built by HitachiWCM 5 Built by Chittaranjan locomotive works to RDSOs design specifications. Auxiliaries by Westinghouse and North Boyce. Built in 1962, these are Indias first indigenously designed DC electric locomotives. The first was named Lokamanya after the Congress leader BalGangadharTilak. 3700 hpWCM 6 A rare and highly powerful class. 5000 hp, only two were built. Now converted to run on AC power, class name changed to WAM 4Passenger locomotives:WCP 1, WCP 2 Historically very important locomotives as these are the very first electric loco(GIPR EA/1 and EA/2 to be used in India. The first locomotive was named as Sir Roger Lumney and is currently preserved in the National Rail Museum, New Delhi. 2160 hpWCP 3, WCP 4 GIPR EB/1 and EC/1, these are also among the earliest electric locos used in IndiaGoods locomotives:WCG 1 These are Swiss crocodile locomotives imported in 1928 from Swiss locomotive works.(GIPR EF/1 These are among the earliest electric locos used in India.The first locomotive was named as Sir Leslie Wilson and is currently preserved in the National Rail Museum, New Delhi. 2600-2950 hpWCG 2 Designed by Chittaranjan locomotive works in 1970AC electric tractionThe 25 kV AC system with overhead lines is used throughout the rest of the country.Mixed type locomotivesWAM 1 Among the first AC electric locomotives used in India. Introduced in 1959. Now out of service. 3010 hpWAM 2WAM 3WAM 4 Indigenously designed by Chittaranjan Locomotive Works in 1970. Highly powerful class. One of the most successful locomotives in India. 3850 hpPassenger locomotivesWAP 1 Designed by Chittaranjan locomotive works in 1980 for the Kolkata-Delhi Rajdhani Express. A very successful class. 3900 hpWAP 2 Not in use
WAP 3 Not in useWAP 4 Upgraded from WAP 1 for higher loads by Chittaranjan locomotive works in 1994. One of the most successful locomotives in India. Very powerful class. 5350 hpWAP 5 Imported in 1995 from Switzerland and used on premier express trains. 5450 hpWAP 6 Only found near AsansolWAP 7 Same design as WAG 9 with modified gear ratio. Highly powerful class. 6250 hpGoods locomotivesWAG 1WAG 2WAG 3WAG 4WAG 5 The most successful electric locomotives in India. Designed by chittaranjan locomotive works in 1984. More than 1100 were made. 3850 hpWAG 5A, Technical variants of WAG 5WAG 5BWAG 6A Imported from ASEA and Hitachi. 6110 hpWAG 6B, Variants of WAG 3A. All rated at 6110 hpWAG 6cWAG 7 Very successful class. Designed by chittaranjan locomotive works. 5000 hpWAG 9 Currently the most powerful class in India, rated at 6350 hp. Same design as WAP 7 with modified gear ratio. Designed by Adtranz, SwitzerlandDual (both AC and DC) tractionNote: These locomotives are, or were used only in sections around Mumbai which is the only location inIndia still using DC traction. They can run under AC traction too. The main purpose behind themanufacture of these types of locomotives was to provide transportation in and out Mumbai areawithout changing the engine.Mixed type locomotives:WCAM 1WCAM 2WCAM 3 Designed by Bharat Heavy Electricals Limited. 4600 hp under DC traction and 5000 hp under AC tractionGoods locomotives:WCAG 1 Designed by Bharat heavy electricals limited. 2930 hp under DC traction and 4720 hp under AC tractionNote:There is no dedicated dual current passenger locomotive in India, but in Mumbai area, there aresome EMUs which can run under dual traction.