Locomotives of India

A WAP 7 class broad gauge AC electric locomotive.

A passenger train with WDM-3D broad gauge diesel locomotive.

A Nilgiri Mountain Railway metre gauge class X steam locomotive.

The locomotives of India presently consist of electric and diesel locomotives. Steam locomotives are no longer used in India, except in heritage trains. A locomotive is also called loco or engine.

The Bengal Sappers of the Indian Army were the first to run a steam locomotive in India. The steam locomotive named ‘Thomason’ ran with two wagons for carrying earth from Roorkee to Piran Kaliyar in 1851, two years before the first passenger train ran from Bombay to Thane in 1853.

Classification of Locomotives

In India, locomotives are classified according to their track gauge, motive power, the work they are suited for and their power or model number. The class name includes this information about the locomotive. It comprises 4 or 5 letters. The first letter denotes the track gauge. The second letter denotes their motive power (Diesel or Electric) and the third letter denotes the kind of traffic for which they are suited (goods, passenger, mixed or shunting). The fourth letter used to denote locomotives' chronological model number. However, from 2002 a new classification scheme has been adopted. Under this system, for newer diesel locomotives, the fourth letter will denote their horsepower range. Electric locomotives don't come under this scheme and even all diesel locos are not covered. For them this letter denotes their model number as usual.

A locomotive may sometimes have a fifth letter in its name which generally denotes a technical variant or subclass or subtype. This fifth letter indicates some smaller variation in the basic model or series, perhaps different motors, or a different manufacturer. With the new scheme for classifying diesel locomotives (as mentioned above) the fifth item is a letter that further refines the horsepower indication in 100 hp increments: 'A' for 100 hp, 'B' for 200 hp, 'C' for 300 hp, etc. So in this scheme, a WDP-3A refers to a 3100 hp loco, while a WDM-3F would be a 3600 hp loco.

Note: This classification system does not apply to steam locomotives in India as they have become non-functional now. They retained their original class names such as M class or WP class.

Heritage Gallery of Indian Railways

First Train of East Indian Railway in 1854
Photo of first passenger train on 16 April 1853
East Indian Railway Mail
1948 photo of Secunderabad Railway Station
X-Dominion for India.png

X-Dominion for India

The classification syntaxes

The first letter (gauge)

W – Indian broad gauge (the "W" Stands for Wide Gauge - 5 ft 6 in)
Y – metre gauge (the "Y" stands for Yard Gauge - 3 ft or 1000mm)
Z – narrow gauge(2 ft 6 in)
N – narrow gauge (toy gauge) (2 ft)

The second letter (motive power)

D – diesel
C – DC electric (can run under DC overhead line only)
A – AC electric (can run under AC overhead line only)
CA – both DC and AC (can run under both AC and DC overhead line); 'CA' is considered a single letter
B – Battery electric locomotive (rare)

The third letter (job type)

G – goods
P – passenger
M – mixed; both goods and passenger
S – shunting (also known as switching engines or switchers in the USA and some other countries)
U – multiple units (EMU/DMU)
R – Railcars

For example, in "WDM 3A":

"W" means broad gauge
"D" means diesel motive power
"M" means suitable for both goods and passenger service
"3A" means the locomotive's power is 3,100 hp ('3' stands for 3000 hp, 'A' denotes 100 hp more)

Or, in "WAP 5":

"W" means broad gauge
"A" mean AC electric traction motive power
"P" means suitable for Passenger service
"5" denotes that this locomotive is chronologically the fifth electric locomotive model used by the railways for passenger service.

Broad gauge (5 ft 6 in) locomotives used in India

Steam traction

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Left:Indian Railways Preserved locomotive HPS, Right:Indian Railways class locomotive NRM WP 7200

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Left:Indian Railways Preserved locomotive YP class, Right:Indian Railways class locomotive B-26

Company designs

In the nineteenth century, the various railway concessions ordered locomotives to their own specification, usually from British manufacturers. This multiplicity of similar, but different designs, increased manufacturers' costs and slowed production. During the 1890s, British manufacturers had full order books, so Indian railway companies looked to Germany and the United States for locomotives.^[1]

Bengal Nagpur Railway

Class F – 0-6-0
Class GM – 2-6-0. Probably modified.
BNR class HSG – 2-8-0+0-8-2 Garratt homed at Bengal Nagpur Railway (BNR) now Eastern Railway and South-Eastern Railway. First successful Garratts in India.
Class M – 4-6-2. Probably modified.
BNR class N – 4-8-0+0-8-4 Garratt. Largest locomotive to run in India. Highest capacity to hold water as compared to any Garratt in the world. One is preserved at National Rail Museum, Delhi.
BNR class NM – 4-8-0+0-8-4 Garratt. Similar to N class. Ten built in 1931 by Beyer Peacock. Withdrawn in the late 1960s.
BNR class P – 4-8-2+2-8-4 Garratt. Four built by Beyer Peacock in 1939. In the early 1970s, they were at Bhilai (BIA) shed before being withdrawn.

Bombay, Baroda and Central India Railway

BB&CI class P – 4-6-2;
Class A - 2-4-0T. Probably an Atlantic. Belonged to Palej shed.
Class U36 – 0-4-2 used for hauling suburban trains at Mumbai.
Class D1 – 4-4-0. One of them named Princess May.
Class M – 4-6-2. Probably modified.

Eastern Bengal Railway

East Indian Railway Company

Class CT – 0-6-4T. Probably converted to Super-heater.
EIR class G – 2-2-2T. First two named Express and Fairy Queen Built in 1856, the latter is the world's oldest locomotive to be in working order. Later rebuilt by Perambur Loco Works. Housed at E.I.R.
EIR class P – 4-6-0;

Great Indian Peninsula Railway

GIPR classes Y1, Y2, Y3, and Y4 – 0-8-4T. Used on Thull ghat as bankers (for pushing trains up the ghat).
GIPR Class F – 2-6-0.
GIPR Class F3 – 2-6-0.
GIPR class J1 – 0-6-0
Class D4 – 4-6-0. One named Hero.
Class D5 – 4-6-0 Passenger locomotive.
Class E1 – 4-4-2 Atlantic built by North British Locomotive Co. Ltd between 1907-8. Rebuilt with super-heater between 1925-28.
Class T – Tank locomotive was used for hauling Mumbai suburban trains on G.I.P.R.
Class Y – 2-8-4T
Crane Tank – 0-6-0T. One is preserved at National Rail Museum, New Delhi.

Madras and Southern Mahratta Railway

M&SM class V – 4-4-0. One is preserved.
Class BTC – 2-6-4T. Based on BESA specifications.
Class T – 0-4-2 at Madras.

Nizam's Guaranteed State Railway

NSR class A - 2-6-0T owned by Nizam State Railway (NSR). One (No. 48) preserved at National Rail Museum,Delhi. Probably an Atlantic.

North Western Railway (British India)

Class EM – 4-4-2 probably modified. One preserved at National Rail Museum,Delhi.
NWR class GAS – 2-6-2+2-6-2 Garratt owned by North Western Railway (NWR) now most of which is in Pakistan. Only one built in 1925. Retired in 1937.
NWR class P – 2-4-0;
Class E1 – 4-4-2.
Class N1 – 4-8-0

Oudh and Rohilkhand Railway

Class B26 – 0-6-0. One preserved at National Rail Museum,Delhi.

South Indian Railway

Others

Class B – 2-6-0.
Class E – 2-4-0.
Class F – 2-8-2 built between 1926-1950 by Nasmyth Wilson for service on Central Railway (CR).
Class G – 2-6-0 probably meant for freight.
Class NA2 –
Class PTC – 2-6-4T owned by Delhi at Northern Railway (N.R.). Probably Converted Passenger locomotives.
Class Y2 – 2-8-2T. These are reclassified L2.
Phoenix – 0-4-0T. One is preserved at National Rail Museum, Delhi
Ramgotty – 2-2-0T. One is preserved at National Rail Museum, Delhi. Converted to Broad Gauge. Oldest locomotive at National Rail Museum, Delhi.
Sultan, Sahib and Sindh – These are the ones which hauled the legendary train from VT to Thana in 1853.

British Engineering Standards Association (BESA) designs

After acrimonious words in The Times and Parliament, the British Engineering Standards Committee (later British Engineering Standards Association or BESA) began to design a series of locomotives for use by all railways in India. The first two designs emerged in 1903: a 4-4-0 passenger, and 0-6-0 goods. The designs were revised in 1905 and 1906 with additional types added due to requests for heavier and more powerful locomotives:

Class SP – Standard Passenger – 4-4-0;
Class SG – Standard Goods – 0-6-0;
Class PT – Passenger Tank – 2-6-4T;
Class HP – Heavy Passenger – 4-6-0;
Class AP – Atlantic Passenger – 4-4-2;
Class HG – Heavy Goods – 2-8-0;
Class HT – Heavy Tank – 2-8-2T.

These BESA designs however were advisory, not mandatory, and were customized by the railway companies to their own taste. The railway companies could not even agree to use the same classification system: only the state operated railways used the class designations SP, SG, PT, HP, AP, HG and HT. Once superheating became accepted, superheated versions were classified SPS, SGS, etc. if built with superheaters, and SPC, SGC, etc. if converted from saturated to superheated.

Indian Railways Standards (IRS) designs

After World War I, new, larger, more powerful locomotives were designed by the British consulting engineers to the Indian Government. These started to appear from 1927 onwards:

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Left:Indian Railways locomotive XP class 1935, Right:Indian Railways class locomotive XB class 1927

Class XA – branch passenger 4-6-2 design, 12.5-ton axleload;
Class XB – light passenger 4-6-2 design, 17-ton axleload;
Class XC – heavy passenger 4-6-2 design, 19.5-ton axleload;
Class XD – light goods 2-8-2 design, 17-ton axleload;
Class XE – heavy goods 2-8-2 design, 22.5-ton axleload;
Class XF – light shunting 0-8-0 design, 18-ton axleload;
Class XG – heavy shunting 0-8-0 design, 23-ton axleload;
Class XH – 4-cylinder 2-8-2, 28-ton axleload (none built);
Class XP – experimental passenger 4-6-2, 18.5-ton axleload;
Class XS – experimental 4-cylinder 4-6-2, 21.5-ton axleload;
Class XT – light tank 0-4-2T, 15-ton axleload.

World War II designs

During World War II, large numbers of 2-8-2 locomotives were acquired from the United States and Canada, and were designated as classes AWD and CWD respectively. The Baldwin Locomotive Works adapted the USATC S160 Class locomotive design India which became class AWC. 60 broad gauge locomotives were built in 1944 as part of an order of 180 locomotives to the S160 design. In addition to modified frame spreaders, axles, cylinders, and cab, the Indian locomotives had a turbo-generator and electric lighting fitted, which was not included in the standard design for use in Europe. Many parts, including boilers, were identical to those used for the standard gauge locomotives.^[2]

Indian Government Railways (IGR) standard designs

Shortly before World War II, new classes were designed; but it would post-war before many of them came into service. These new designs were signalled by the change of broad gauge prefix from 'X' to 'W'. In addition, plans were put into place to start manufacturing locomotives in India. The new classes were:

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Left:Indian Railways locomotive WL class, Right:Indian Railways class locomotive YG class

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Left:Model of a (decommissioned) WP Steam Locomotive at Guntur Division, Right:Model of a (decommissioned) Indian Railways steam locomotive M2-162

Class WP – passenger 4-6-2, 18.5-ton axleload;
Class WG – goods 2-8-2, 18.5-ton axleload;
Class WL (1st) – light 4-6-2, 16-ton axleload (four for North Western Railway in 1939; all to Pakistan at Partition);
Class WL (2nd) – light 4-6-2, 16.75-ton axleload;
Class WM – 2-6-4T, 16.25-ton axleload;
Class WT – 2-8-4T, 18-ton axleload;
Class WU – 2-4-2T, 16.5-ton axleload;
Class WV – 2-6-2T, 16.25-ton axleload;
Class WW – 0-6-2T, 16.5-ton axleload.

All broad gauge steam locomotives in India have been withdrawn from normal service, with only occasional steam specials continuing to operate.

Diesel traction

Classification codes

WDM – Wide Diesel Mixed
WDP – Wide Diesel Passenger
WDG – Wide Diesel Goods
WDS – Wide Diesel Shunter
WCDS – Wide Converted Diesel Shunter

Mixed type locomotives

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Above:Indian Railways locomotive WDM-2, Below:Indian Railways locomotive WDM-2A (ABR)

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Above:Indian Railways locomotive WDM-3D (JHS), Below:Indian Railways locomotive WDM-3A class

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Above:Indian Railways locomotive WDM-3A , Below:Indian Railways locomotive WDM-4

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,WDM 2B (Technical variants of WDM 2. WDM2A stands are dual braked and WDM2B are air braked usually)
WDM 2G It is the first Multi-Gen-set locomotive of Indian Railway manufactured by DLMW, Patiala in 2013. As of February 2014 only one loco has entered service and has been numbered as #80000.^[3] It has been cleared for a max. speed of 105 km/h.^[4]
WDM 3 (Only 8 were imported. They used hydraulic transmission and are currently non-functional. 2500 hp. 120 km/h. Built in 1970 by Henschel & Son)
WDM 3A (Formerly WDM 2C. Another WDM 2 variant. It is not related to WDM 3. Max speed 120 km/h. 30450kgf of tractive effort. Built since 1994) One of the most heavily used diesel locomotives in India at present.
WDM 3A R (Formerly WDM 2. It is a rebuilt with DBR fitted on Short Hood. It is not related to WDM 3. They are rebuilt at DLMW, Patiala)
WDM 3B (Co-Co bogies. Rated at 120 km/h. Homed at Uttar Pradesh sheds. 23 built by DLW. Similar to WDM3D. 3100 hp)^[5]
WDM 3C, WDM 3D (higher powered versions of WDM 3A. 3300 hp. WDM3C is rebuilt from WDM2. WDM3C max speed 120 km/h. WDM3D max speed 160 km/h)
WDM 3E (Reclassified as WDM 3D. Restricted to freight at 105 km/h. 8 units known. Manufactured by DLW . 3500 hp)
WDM 3F Manufactured by Diesel Locomotive Works (DLW).3600 hp.HAHS bogies. Conventional DBR. Air brake only.
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; Exported to Sri Lanka. Rated at 1350 hp. Max speed 75 km/h. 19200kgf tractive effort. Fabricated Bo-Bo bogies)
WDM 7 (Fifteen of these locos were built from June 1987 through 1989, they were designed for branch-line duties, but they are now used mostly for shunting. Rated at 2000 hp)

Note: No locomotive class was designated as WDM 5 in India.

Passenger locomotives

Left:Indian Railways locomotive WDP-4, Right:Indian Railways locomotive WDP-4B

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Left:Indian Railways locomotive WDP-4D, Right:Indian Railways locomotive WDP-4 (KJM)

WDP 1 (Bo-Bo bogies. 80 tons weight. Rated speed of 140 kmph. 12 cylinder engine. 2300 hp. Built by DLW in 1970. Homed at Vijayawada and Tughlakabad sheds only.)
WDP 2 (New class name WDP 3A. Dedicated passenger diesel locomotive. Entered service in 1998. Max speed 140kmph. Built by DLW. 29.25 tons of tractive effort. 3100 hp)^[6] ^[7]

File:The WDP-3A class Locomotive of Indian Railways.jpg
The WDP-3A class Locomotive of Shed GOC #15515 bringing Thirukural Express to Nagercoil.
WDP 3 (These locomotives are actually prototypes of the class WDP 1 and never entered serial production. Designed in 1996 by DLW. 2300 hp. Co-Co bogies.)
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.As of now,serial production of the single cab locomotives has been stopped. 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 LCD instrument display and toilet for the drivers. Has entered serial production and regular service. 4500 hp

Goods locomotives

Left:Indian Railways locomotive WDG-3A, Right:Indian Railways locomotive WDG-4

WDG 2 (New class name WDG 3A. These class is actually a technically upgraded form of WDM 2. Max speed 100 km/h. Built by DLW)
WDG 3B, WDG 3C, WDG 3D (Technical upgraded forms of WDG 2 or WDG 3A. WDG 3B and WDG 3C are rebuilt to WDG 3A. WDG 3C is rated at 3330 hp.)^[8]
WDG 4 (Dedicated goods locomotives. These are General motors' GT46MAC models. First units were imported in 1999. They are numbered from #12000 upward till #12999 and #70000 upwards.^[9] Local production started in 2002. 4000-4500 hp)
WDG 4D (Technical variant of WDG4 with dual cabs. IGBT. Max speed 105 km/h restricted to 100 km/h. Air conditioned cabs. First dual cab freight dedicated diesel engine in India)^[10]
WDG 5 (Another Freight dedicated Locomotive developed by Diesel Locomotive Works and Supported by Electro Motive Diesels. First unit was rolled out from DLW on 25 February 2012. They are numbered from #50001 upward (Two produced as of 29 April 2015). Rated at 5500 hp. Equipped with Fire Control System, TFT Display and Driver's Toilet. The locomotive/series is named 'BHEEM', after the strong Pandav brother from epic of Mahabharat. The locomotive has completed its trials and has entered serial production. These locomotives are assigned to the Sabarmati Diesel Loco Shed.

Shunting locomotives (also known as switching engines)

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Left:Indian Railways Shunting locomotive WDS-4D, Right:Indian Railways WDS-4 Shunting locomotive

WDS 1 (First widely deployed and successful diesel locomotives used in India. Imported in 1944-45. currently out of service. 386 hp)
WDS 2 (o-C-o bogies. 8 cylinder engine. Homed at Central Railway. Max speed 54 kmph. Built by Kraus Maffei in 1954-55. 440 hp. 15420kgf of tractive effort)
WDS 3 (All locomotives of this class were rebuilt and reclassified as WDS 4C in 1976-78. 618 hp. 17100kgf of tractive effort. Built in 1961)
WDS 4,WDS 4A,WDS 4B,WDS 4D (Designed by Chittaranjan Locomotive Works. 600-700 hp. C bogies. Built between 1968-97.)
WDS 4C (Rebuilt by CLW, WDS 3 locos as mentioned above. 700 hp. 18000kgf tractive effort. C bogies. Out of service. Max speed 65kmph.)
WDS 5 (Some of these locomotives are used for industrial shunting. A few are used on Indian Railways. Rated at 1065 hp)
WDS 6 (Heavy-haul shunters made in large numbers for industrial concerns as well as for Indian Railways Rated at 1200/1350 hp)
WDS 6R, WDS 6SL and WDS 6AD (Technical variants of WDS 6. WDS6SL is exported to Sri Lanka. WDS6AD has a max speed of 50 kmph and a 6-cylinder engine.)^[11]
WDS 8 (Only five of these were made by CLW, and all were transferred to steel works 800 hp. Max speed 35kmph. 22000kgf tractive effort)

There were also a few hydraulic diesel shunters in use at Integral Coach Factory, Diesel Locomotive Works and Chittaranjan Locomotive Works. These were rated at 250 hp.^[12]

Note: There is no electric shunting engine in India. Classes from WDS 1 to WDS 4D have hydraulic transmission. The WDS 4, 4B, 4C and 4D are the only still existing broad gauge locomotives with diesel-hydraulic transmission.

Converted locomotives

WCDS6 is a converted YDM4 locomotive into a broad gauge locomotive. This rebuilding was carried out by the Golden Rock shed. It was built for large industrial concerns. The first one was delivered to RITES. Rest being same, new water and air lines are added. They also have a modified control stand and dual brake system. Also, they have Broad Gauge bogies and under-frames.

Diesel multiple units

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Left:Indian Railways DHMU, Right:Indian Railways DEMU

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 service in a few places known as 'railbus'.

DC electric traction

Note: These locomotives are no longer used, or were used only in sections around and in Mumbai which is the only location in India still or was 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. Seven built by English Electric at Vulcan Foundry in 1954–55. 3700 hp)
WCM 2 (Out of service. Co-Co bogies. 120 kmph speed. 12 Built by Vulcan Foundry between 1956-57. Modified by RDSO. 3120 hp)
WCM 3 (3600 hp. Co-Co – Used in Kolkata, then transferred to Mumbai; three built by Hitachi in 1958. Out of service. Max speed 120kmph)
WCM 4 (4000 hp. Co-Co – seven built by Hitachi in 1960. Out of service. Rated at 120 kmph. Meant for freight. 31300kgf tractive effort)
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 freedom fighter Bal Gangadhar Tilak. 3700 hp Co-Co.)
WCM 6 (5000 hp, only two were built in 1995 by CLW. Now converted to run on AC power. 105kmph initially now restricted to 65kmph )

Passenger locomotives

File:Electric loco 4006.jpg

Preserved WCP1

WCP 1, WCP 2 (GIPR EA/1 and EA/2. Historically very important locomotives as these are the very first electric loco to be used in India. The first locomotive was named as Sir Roger Lumley and is currently preserved in the National Rail Museum, New Delhi. Swiss Locomotive and Machine Works (SLM) built one in 1928 and 21 in 1930 (WCP1), and one in 1938 (WCP2). 1′Co2′ wheel arrangement; 2160 hp)
WCP 3, WCP 4 (GIPR EB/1 and EC/1, these are also among the earliest electric locos used in India. One of each class built by Hawthorn Leslie and Company in 1928; 2′Co2′ wheel arrangement.)

Goods locomotives

File:Indian electric locomotive 4502.jpg

Preserved WCG1

WCG 1 (GIPR EF/1. These are Swiss crocodile locomotives imported in 1928 from Swiss Locomotive and Machine Works (ten) and Vulcan Foundry (30). 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. 57 built until 1977. 4200 hp. Max speed 90kmph.^[13] 35600kgf tractive effort. Were used extensively around the year 2000 when Mumbai was out of traction power. Out of service^[14])

Electric multiple units

Mumbai Suburban Railway EMU

WCU 1 to WCU 15 (Used in Mumbai region only)

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. Max speed 112kmph)
WAM 2 (Out of service. Bo-Bo Bogies. Max speed 112 kmph. Built by Mitsubishi between 1960-64. 2910 hp. 25240kgf tractive effort)
WAM 3 (Out of service. Bo-Bo bogies. Same as WAM 2 except for reverse pantographs. Built in 1964 by Mitsubishi)
WAM 4 (Indigenously designed by Chittaranjan Locomotive Works in 1970. Highly powerful class. One of the most successful locomotives in India. 3850 hp)
WAM 4B, WAM 4P, WAM 4PD, WAM 4PR, WAM 4PDBHS, WAM 46PD, WAM 4PDB3P, WAM 42S3P, WAM 46PDBHS, WAM 46PE, WAM 4G, WAM 4H and WAM 4E (Technical variants of WAM4)

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Above:Indian Railways class WAM-4 (AJJ), Below:Indian Railways class WAM-4 (MGS)

Passenger locomotives

File:(Bellampalli-Hyderabad) Intercity Express at Aler.jpg

Indian Railways class WAP-7

Indian Railways class WAP-4

WAP 1 (Designed by Chittaranjan locomotive works in 1980 for the Kolkata-Delhi Rajdhani Express. A very successful class. 3900 hp. Max speed 130 kmph)
WAP 2 (Decommissioned in the late 1980s. Similar to WAM2 & 3. 4 built. Also had Flexicoil Mark -ll bogies. 2910 hp. Only 4 units built)
WAP 3 (Rebuilt to WAP-1. Similar to WAP-1. Approximated speed of 160 kmph restricted to 145 kmph. 5 Built since 1987.)
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. 5000 hp. Tested for Max speed 160 kmph. Restricted to 140 kmph)
WAP 5 (Imported in 1995 from Switzerland and used on premier express trains. Being built by CLW since 2000. 5450 hp. Highly powerful class. Bo-Bo type locos. Max speed tested for 184 kmph. Restricted to 160 kmph.)
WAP 6 (Most of them rebuilt to WAP-4. Max speed 170 kmph. 16 built by Chittaranjan Locomotive Works in 1997. 5000 hp.)
WAP 7 (Same design as WAG 9 with modified gear ratio. Highly powerful class. 6000 hp. Tested for 155 kmph. Restricted to 140 kmph. Built by CLW since 2000)^[15]

Goods locomotives

File:WAG1 locomotive.jpg

Indian Railways class WAG-1 (BZA)

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Left:Indian Railways class WAG-7 (old Variant), Right:Indian Railways class WAG-7 (New Livery)

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Left:Indian Railways class WAG-5 (JHS) , Right:Indian Railways class WAG-5 (VSKP)

WAG 1 (Out of service after 2002. B-B bogies. Max speed 80 km/h. Built by several builders between 1963-66. 2930 hp. First freight dedicated locomotive under AC traction)
WAG 1S (Technical variants of WAG 1)
WAG 2 ( Out of service. B-B bogies. Max speed 80 km/h. WAP 2 are technical variants of WAG 2. Built by several builders between 1964-65. 3450 hp)
WAG 3 (Out of service. Monomotor bogies. Max speed 80 km/h. 10 Built in 1965. 3590 hp. 30000 kgf tractive effort. Above 6000 tons hauling capacity up to 70 km/h on level track)^[16]
WAG 3A (Technical variant of WAG 3)
WAG 4 (Out of service. B-B bogies. Max speed 80 km/h. Technical variants are WAG 4A,D. Built by Chittaranjan Locomotive Works between 1966-71. 3590 hp)
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,WAG 5B,WAG 5D,WAG 5E,WAG 5H,WAG 5HA,WAG 5HB,WAG 5HD,WAG 5HE,WAG 5PE,WAG 5RH. (Technical variants of WAG 5)
WAG 6A (Imported from Allmänna Svenska Elektriska Aktiebolaget(ASEA). 6110 hp. Max speed 100 km/h. Bo-Bo-Bo Bogies. The most powerful non-3 phase AC electric locomotives in India)
WAG 6B,WAG 6C (Variants of WAG 3A. Built by Hitachi in 1988. Regenerative brakes. 44950 kgf tractive effort. Upgradeable to 160 km/h)
WAG 7 (Very successful class. Built by CLW and BHEL. 5350 hp. 41000kgf. Max speed 100kmph. 123tons in weight)
WAG 7H (Technical variant of WAG7 with 132tons of weight and 45000kgf of tractive effort. Two units built)
WAG 8 (Out of service. Similar in looks to WCAM 2 and technically to WCAM 3. Built by BHEL in 1998. Experimental class)
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.)
WAG 9H, WAG9i and WAG9Hi (Technical variants of WAG9. WAG9H is the heavier version. WAG9i is the one fitted with IGBT traction converters. WAG9Hi is probably a combination of WAG9H and WAG9i)^[14]

Electric multiple units

WAU 1 to WAU 4

Left:Chennai EMU, Right:Hyderabad MMTS

Dual (both AC and DC) traction

Note: These locomotives are used only in sections around Mumbai. They can run under AC traction too. The main purpose behind the manufacture of these type of locomotives was to provide transportation in and out Mumbai area without changing the engine.

Mixed type locomotives

Left:Indian Railways locomotive WCAM-2P, Right:Indian Railways locomotive WCAM-3

WCAM 1 (Designed by Chittaranjan Locomotive works, total 53 were built and supplied between 1975-79. All owned by Western Railway) Only locomotive currently used having reverse pantographs. Now decommissioned.
WCAM 2/2P (Designed by Bharat Heavy Electricals Limited, total 20 were built and supplied between 1995-96. Tested 135kmph under AC)
WCAM 3(50 Designed by Bharat Heavy Electricals Limited. 4600 hp under DC traction and 5000 hp under AC traction. All owned by Central Railway. Most widely used loco in the Mumbai Pune section).

Goods locomotives

WCAG 1 (12 Designed by Bharat heavy electricals limited between 1999-2000. Similar to the WCAM 3 in outer structure. 4600 hp under DC traction and 5000 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.

Battery traction

In 1927, English Electric and WBC built 2 shunters for use in yards at Bombay(now Mumbai). They had Bo-Bo bogies. Rated at 240 hp. They weighed 58 tons.^[17]