MuoiBraley9009 at 06:54, 22 March 2026

2026-03-22T06:54:49Z

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{{Short description|Indian Railways freight class diesel locomotive}}
{{more citations needed|date=October 2011}}
{{Infobox locomotive
| name = WDG-4
| powertype = [[Diesel–electric]]
| image = KZJ WDG4 TWINS.jpg
| caption = Kazipet WDG-4 Twins (4500 HP GT46ACe variants) standing at Bilaspur Jn.
| builder = [[Electro-Motive Diesel|EMD]] [[Banaras Locomotive Works|BLW]]
| serialnumber = 12001–12999,70001-70190
70301–70882
| buildmodel = [[List of EMD locomotives|GT46MAC]] (1997–2007) [[List of EMD locomotives|GT46ACe]] (2007–2016) [[List of EMD locomotives|JT46ACe]] (2013–2018)
| builddate = (EMD) 1997–1998 (BLW) 2002–2018
| totalproduction = WDG-4: '''1188''' WDG-4D: '''583''' (Mainline Production has stopped, but happens occasionally for Non-Railway Customers)
|Britishclass=[[Co-Co locomotive|Co-Co]]
|uicclass=Co′Co′
| gauge = {{track gauge|5ft6in|lk=on}}
| trucks = HTSC
| length = {{convert|21.26|m|ftin|abbr=on}}
| height = {{convert|4.11|m|ftin|abbr=on}}
| locoweight = {{convert|126,000|kg|lb|abbr=on}} or {{convert|126|t|LT ST|abbr=on}}
| axleload = {{convert|21,000|kg|lb|abbr=on}}
| fueltype = [[Diesel fuel]]
| fuelcap = 6,100 Litres
| primemover = [[EMD 710|EMD 16-710G3B]]
| enginetype = [[Two-stroke engine|two-stroke]] [[V16 engine|V16]] [[Diesel engine|diesel]]
| displacement = {{convert|186.2|L|cuin|abbr=off|sp=us}}
| aspiration = [[Turbocharger|turbocharged]]
| alternator = TA-17-CA6A AC
| cylindercount = 16
| transmission = [[Diesel–electric transmission|diesel–electric]]
| tractionmotors = 1 [[inverter]] per truck, [[Alternating current|AC]] traction motors
| maxspeed = {{convert|105|km/h|mph|abbr=on}}
| poweroutput = {{convert|4,000|hp|kW|-1|abbr=on}} / {{convert|4,500|hp|kW|-1|abbr=on}}
| tractiveeffort = {{convert|540|kN|lbf|abbr=on}}
| fleetnumbers = WDG-4: 12001–12999 & 70001–70190 WDG-4D: 12681 & 70301–70882
| operator = [[Indian Railways]], [[Sri Lanka Railways]] [as locomotive class [[Locomotives of Sri Lanka Railways#Class M — Diesel Electric Locomotives|M-11]], Down-tweaked to 3,250 HP (2.4 MW) using a [[EMD 710|v12-710]] prime mover]
| locobrakes = [[Railway air brake|Air]]
| trainbrakes = Graduated Release Twin Pipe [[Railway air brake|Air]] Brake, [[Dynamic braking|Dynamic Brakes]], Blended
}}

The '''Indian locomotive class WDG-4 (EMD GT46MAC)''' is a type of six-axle ([[Co-Co locomotives|Co-Co]]) [[freight]]-hauling [[diesel–electric locomotive]] with AC electric transmission designed by [[Electro-Motive Diesel|General Motors Electro-Motive Diesel]]<ref>{{cite web |url=http://www.gmemd.com/en/locomotive/international/gt46mac/ |title=GM EMD: GT46MAC |access-date=2006-11-19
|archive-url = https://web.archive.org/web/20040303123345/http://www.gmemd.com/en/locomotive/international/gt46mac/ |archive-date = 2004-03-03}}</ref> in 1997–1998 for [[Indian Railways]], where they are classed as '''WDG-4'''. Derived from the [[EMD SD70MAC]], it is powered by a {{convert|4000|hp|kW|abbr=on|lk=on}} [[v16 engine|16-cylinder]] [[EMD 710|EMD 710G3B]] prime mover. Thirteen were built by EMD as order #958647, and a further eight were exported in kit form and assembled in India. The class entered service in 1999. A Dedicated Passenger version of this locomotive, the '''WDP-4''' ([[EMD GT46PAC]]), has also been produced, with a Bo1-1Bo Wheel Configuration, which entered service in 2001. These locomotives are also famous for, and can be identified by, the distinct [[Turbofan|Jet Turbine Engine]]–like sounding property of the EMD 710 prime mover.

Further construction has been under license in India by the [[Banaras Locomotive Works|Banaras Locomotive Works (BLW)]], with the first purely indigenously built WDG-4 locomotive, numbered 12022, that rolled out in 2002. More than 60 additional locomotives have been built {{As of|2006|lc=on}}. They are numbered from #12001 upward.

{{As of|2007|08}}, EMD and DLW have begun building GT46ACe's using [[IGBT]] technology to replace the older [[gate turn-off thyristor]] technology and along with increase of 500 hp, ie, {{convert|4500|hp|MW|abbr=on}}, using the Newly tweaked EMD 16N-710G3B-EC, like the passenger [[WDP-4B]] have been produced. Newer versions with widened ''Piggy-face'' cab profile for enhanced visibility, just like the later variants of WDP-4's and WDP-4B's were also produced.

{{As of|2013|14}}, DLW began building the Dual Cab version, EMD JT46ACe, called '''WDG-4D''', based on the passenger variant [[WDP-4D]] locos, same for both-side visibility. Here again, many features, including IGBT and 4,500 hp have been carried on from the single cab GT46ACe's. The first WDG-4D, numbered 12681, is named "Vijay". Later WDG-4D's were numbered from 70301, as the 12*** series came to an end in 2014 and got switched to 70*** series. Over 1,500 such locomotives, including both WDG-4's and WDG-4D's are currently in operation.

Indian Railways has also developed the WDG-4 series into [[WDG-5|EMD GT50AC]] (aka WDG-5), using a v20-710G prime mover, based on the [[SD80MAC]], rated at 5,500 HP (4,130 kW). However, this locomotive has turned out to be a Failure, due to various reasons.

Since the year 2017, BLW (DLW then) began manufacturing such locomotives for Non-Railway Customers. The first such locomotive, which would be a Dual-Cab WDG-4D, rolled out to serve [[Odisha Power Generation Corporation]] (OPGC), in March 2017. Three WDG-4D locomotives currently serve OPGC.{{As of?|date=September 2024}} As of 2024, two new Single-Cab ''Piggy-face'' WDG-4 locomotives have been manufactured and rolled out for [[Obra Thermal Power Station]], based at Sonbhadra, Uttar Pradesh.

==Train Services==
this diesel pull 90% goods train and 10% passenger trains in 2010s-2020s
*[[Karnataka Express]] (ICF rakes)
*[[Chalukya Express]] (ICF rakes)
*[[Konark Express]] (ICF rakes)
*[[Rajdhani Express]] (LHB rakes)
*[[Shatabdi Express]] (LHB rakes)
*[[Suvidha Express]] (LHB rakes)
*[[Kanchanjunga Express]] (both LHB and ICF rakes)

==Locomotive sheds==
{| class="wikitable"
|-
! rowspan="2" style="background:skyBlue;"|Zone
! rowspan="2" style="background:skyBlue;"|Name
! rowspan="2" style="background:skyBlue;"|Shed Code
! colspan="2" style="background:skyBlue;"|Quantity
|-
! style="background:skyBlue;"|WDG-4/4D
|-
| rowspan="2" |[[Central Railway zone|Central Railway]] ||[[Pune Junction railway station|Pune]]|| PADX
|83
|-
| [[Kalyan Junction railway station|Kalyan]] || KYDX
|66
|-
| rowspan="1" |[[Eastern Railway zone|Eastern Railway]]|| [[Andal Junction railway station|Andal]] || UDLD
|148
|-
| rowspan="1" | [[East Central Railway zone|East Central Railway]] || [[Patratu railway station|Patratu]] || PTRX
|79
|-
| [[East Coast Railway zone|East Coast Railway]] || [[Diesel Loco Shed, Visakhapatnam |Visakhapatnam]] || WATD
|131
|-
| rowspan="3" |[[Northern Railway zone|Northern Railway]] || [[Diesel Loco Shed, Ludhiana|Ludhiana]] || LDHD
|26
|-
| [[Lucknow Charbagh railway station|Lucknow]] || AMVD
|58
|-
| [[Tughlakabad railway station|Tughlakabad]] || TKDD
|49
|-
| |[[North Eastern Railway zone|North Eastern Railway]] ||[[Izzatnagar railway station|Izzatnagar]] || IZND
|14
|-
|[[North Central Railway zone|North Central Railway]]
|[[Jhansi Junction railway station|Jhansi]]
|JHSD
|70
|-
| rowspan="2" |[[Northeast Frontier Railway zone|Northeast Frontier Railway]] || [[New Guwahati railway station|New Guwahati]] || NGCD
|37
|-
| [[Siliguri Junction railway station|Siliguri]] || SGUD
|156
|-
| rowspan="2" |[[North Western Railway zone|North Western Railway]] || [[Bhagat Ki Kothi railway station|Bhagat Ki Kothi]] || BGKD
|37
|-
| [[Abu Road railway station|Abu Road]] || ABRD
|116
|-
|rowspan="3" | [[Southern Railway zone|Southern Railway]] || [[Diesel Loco Shed, Golden Rock|Ponmalai Goldenrock]] || GOCD
|75
|-
|| [[Diesel Loco Shed, Ernakulam|Ernakulam]] || ERSX
|24
|-
|| [[Diesel Loco Shed, Tondiarpet|Tondiarpet]] || TNPD
| 14
|-
| rowspan="3" |[[South Central Railway zone|South Central Railway]] || [[Kazipet railway station|Kazipet]] || KZJD
|76
|-
| [[Diesel Loco Shed, Gooty|Gooty]] || GYD
|4
|-
|[[Vijayawada Junction railway station|Vijayawada]] || BZAD
|23
|-
| rowspan="1" | [[South Eastern Railway zone|South Eastern Railway]] || [[Bondamunda railway station|Bondamunda]] || BNDX
|129
|-
|[[South East Central Railway zone|South East Central Railway]] || [[Raipur Junction railway station|Raipur]] || RPDX
|75
|-
| rowspan="2" |[[South Western Railway zone|South Western Railway]] || [[Krishnarajapuram railway station|Krishnarajapuram]] || KJMD
| 26
|-
| [[SSS Hubballi railway station|Hubballi]] || UBLD
|146
|-
| [[Western Railway zone|Western Railway]] || [[Diesel Loco Shed, Sabarmati|Sabarmati]]
|| SBTD
|35
|-
| rowspan="1" |[[West Central Railway zone|West Central Railway]] || [[Diesel Loco Shed, Itarsi|Itarsi]] || ETD
|58
|-
| colspan="3" |'''Total Locomotives Active as of March 2026'''<ref>{{Cite web|title=Diesel loco availability targets|url=https://elocos.railnet.gov.in/Holding/Dsl_Mar'2026.pdf | access-date=2026-03-04}}</ref>
| colspan="3" | 1755
|}


==Non-Railway Operators==
{| class="wikitable"
|-
! rowspan="2" style="background:Orange;"|Name of the Operator
! colspan="2" style="background:Orange;"|Quantity
|-
! style="background:Orange;"|WDG-4/4D
|-
|[[Odisha Power Generation Corporation]]
|3
|-
|[[Obra Thermal Power Station]]
|2
|}

==See also==
*[[Indian locomotive class WDP-4]]
*[[List of diesel locomotives of India]]
*[[Indian Railways]]
*[[Rail transport in India]]

==References==
{{reflist}}

==External links==
{{commons category|EMD GT46MAC locomotives}}
*[http://www.rdso.indianrailways.gov.in/works/uploads/File/Spec-4500HP-2400.43_rev_04_corrted_final_%2026.09.pdf Detailed Specifications for the WDG4]

{{Broad gauge locomotives of India}}
{{EMD misc}}

{{DEFAULTSORT:WDG-4}}
[[Category:Diesel–electric locomotives of India|G-4]]
[[Category:Co-Co locomotives]]
[[Category:Banaras Locomotive Works locomotives]]
[[Category:Electro-Motive Diesel locomotives|G46TMAC]]
[[Category:5 ft 6 in gauge locomotives]]
[[Category:Railway locomotives introduced in 1997]]
[[Category:Freight locomotives]]

Indian locomotive class WDG-4 - Revision history

MuoiBraley9009 at 06:54, 22 March 2026