Typ

1. 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 2B
WDM 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 3D
WDM 4 (Entered service along with WDM 2. Prototypes designed by General Motors. Though
considered superior to WDM 2 in many ways, these locomotives weren't 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 2000hp
WDM 5 No locomotive class was designated as WDM5 in India.
Passenger Locomotives:
WDP 1
WDP 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
production
WDP 4 EMD (former GM-EMD) GT46PAC, fundamentally a passenger version of the WDG 4
(GT46MAC). 4000 hp
WDP 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 hp
WDP 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.

2. Goods locomotives:
WDG 2 New class name WDG 3A. These class is actually a technically upgraded form of WDM 2
WDG 3B, Technical upgraded forms of WDG 2 or WDG 3A
WDG 3C,
WDG 3D
WDG 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 hp
Shunting 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 HP
WDS 2 Currently out of service
WDS 3 All locomotives of this class were rebuilt and reclassified as WDS 4C in 1976-78. 618 HP
WDS 4, Designed by Chittaranjan Locomotive Works. 600-700 hp
WDS 4A,
WDS 4B,
WDS 4D
WDS 4C Rebuilt WDS 3 locos as mentioned above
WDS 5 Some of these locomotives are used for industrial shunting. A few are used on Indian
Railways. Rated at 1065hp
WDS 6 Heavy-haul shunters made in large numbers for industrial concerns as well as for Indian
Railways Rated at 1200/1350hp
WDS 8 Only five of these were made, and all were transferred to steel works 800hp
Note: There is no electric shunting engine in India. Classes from WDS 1 to WDS 4D have hydraulic
transmission. The WDS 4, 4A, 4B, 4C and 4D are the only still existing broad gauge locomotives with
diesel-hydraulic transmission.
Diesel multiple units:
A few routes in India currently have Diesel multiple unit service. Depending on the transmission system
they 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 traction
Note: These locomotives are, or were used only in sections around Mumbai which is the only location in
India still using DC traction.The power operated is 1500V DC.

3. Mixed type locomotives:
WCM 1 First electric locomotives with the now familiar Co-Co wheel arrangement to be used in
India. 3700 hp
WCM 2 520hp
WCM 3 600hp - Used in Kolkata , then transferred to Mumbai, Built by Hitachi
WCM 4 675hp - Also built by Hitachi
WCM 5 Built by Chittaranjan locomotive works to RDSO's design specifications. Auxiliaries by
Westinghouse and North Boyce. Built in 1962, these are India's first indigenously designed
DC electric locomotives. The first was named 'Lokamanya' after the Congress leader
BalGangadharTilak. 3700 hp
WCM 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 4
Passenger 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 hp
WCP 3, WCP 4 GIPR EB/1 and EC/1, these are also among the earliest electric locos used in
India
Goods 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 hp
WCG 2 Designed by Chittaranjan locomotive works in 1970
AC electric traction
The 25 kV AC system with overhead lines is used throughout the rest of the country.
Mixed type locomotives
WAM 1 Among the first AC electric locomotives used in India. Introduced in 1959. Now out of
service. 3010 hp
WAM 2
WAM 3
WAM 4 Indigenously designed by Chittaranjan Locomotive Works in 1970. Highly powerful class.
One of the most successful locomotives in India. 3850 hp
Passenger locomotives
WAP 1 Designed by Chittaranjan locomotive works in 1980 for the Kolkata-Delhi Rajdhani Express.
A very successful class. 3900 hp
WAP 2 Not in use

4. WAP 3 Not in use
WAP 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 hp
WAP 5 Imported in 1995 from Switzerland and used on premier express trains. 5450 hp
WAP 6 Only found near Asansol
WAP 7 Same design as WAG 9 with modified gear ratio. Highly powerful class. 6250 hp
Goods locomotives
WAG 1
WAG 2
WAG 3
WAG 4
WAG 5 The most successful electric locomotives in India. Designed by chittaranjan locomotive
works in 1984. More than 1100 were made. 3850 hp
WAG 5A, Technical variants of WAG 5
WAG 5B
WAG 6A Imported from ASEA and Hitachi. 6110 hp
WAG 6B, Variants of WAG 3A. All rated at 6110 hp
WAG 6c
WAG 7 Very successful class. Designed by chittaranjan locomotive works. 5000 hp
WAG 9 Currently the most powerful class in India, rated at 6350 hp. Same design as WAP 7 with
modified gear ratio. Designed by Adtranz, Switzerland
Dual (both AC and DC) traction
Note: These locomotives are, or were used only in sections around Mumbai which is the only location in
India still using DC traction. They can run under AC traction too. The main purpose behind the
manufacture of these types of locomotives was to provide transportation in and out Mumbai area
without changing the engine.
Mixed type locomotives:
WCAM 1
WCAM 2
WCAM 3 Designed by Bharat Heavy Electricals Limited. 4600 hp under DC traction and 5000 hp
under AC traction
Goods locomotives:
WCAG 1 Designed by Bharat heavy electricals limited. 2930 hp under DC traction and 4720 hp
under AC traction
Note:There is no dedicated dual current passenger locomotive in India, but in Mumbai area, there are
some EMUs which can run under dual traction.