Indian locomotive class WDG-4

The Indian locomotive class WDG-4 (EMD GT46MAC) is a freight-hauling diesel-electric locomotive with AC electric transmission designed by General Motors Electro-Motive Diesel[1] in 1997–1998 for Indian Railways, where they are classed as WDG-4. 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.

WDG-4
WDG4: 12029 in January 2011
Type and origin
Power typeDiesel-electric
BuilderEMD
BLW
ModelGT46MAC (1997-2007)
GT46ACe (2007-2017)
Build date(EMD) 1997–1998
(DLW) 2002–2017
Total producedWDG-4: 1188
WDG-4D: 583 Under License (Production Stops)
Specifications
Configuration:
​
 • AARC-C
 • UICCo-Co, Co'Co'
Gauge5 ft 6 in (1,676 mm)
TrucksHTSC
Length21.26 m (69 ft 9 in)
Height4.11 m (13 ft 6 in)
Axle load21,000 kg (46,000 lb)
Loco weight126,000 kg (278,000 lb)
or 126 t (124 long tons; 139 short tons)
Fuel typeDiesel fuel
Fuel capacity6,100 Litres
Prime mover16-710G3B
Engine typetwo-stroke V16 diesel
Aspirationturbocharged
Displacement186.2 liters (11,360 cubic inches)
AlternatorTA-17-CA6A AC
Traction motors1 inverter per truck, AC traction motors
Cylinders16
Transmissiondiesel electric
Loco brakeAir
Train brakesGraduated Release Twin Pipe Air Brake, Dynamic Brakes, Blended
Performance figures
Maximum speed105 km/h (65 mph)
Power output4,000 hp (2,980 kW) / 4,500 hp (3,360 kW)
Tractive effort540 kN (120,000 lbf)
Career
OperatorsIndian Railways, Sri Lanka Railways (as locomotive class M-11)
NumbersWDG-4 :- 12001 - 12999 & 70001 - 70190
WDG-4D :- 70301 - 70882 & 12681

Further construction has been under license in India by the Banaras Locomotive Works (BLW); more than 60 additional locomotives have been built as of 2006. They are numbered from #12001 upward. A similar type, the EMD GT46PAC, has also been produced for passenger service in India.

As of 2007, EMD and DLW have begun building GT46Ace's using IGBT technology to replace the older gate turn-off thyristor technology. Newer editions with 4,500 hp (3,400 kW) have been produced. Over 1,000 WDG-4 locomotives are currently in operation.

Locomotive sheds
ZoneNameShed CodeQuantity
Central RailwayPunePA90
KalyanKYN23
Eastern RailwayAndalUDL46
JamalpurJMP16
East Central RailwayPatratuPTRU89
Samastipur Junction railway stationSPJ5
East Coast RailwayVisakhapatnamVSKP121
Northern RailwayTughlakabadTKD48
LudhianaLDH32
LucknowLKO14
North Central RailwayJhansiJHS18
North Eastern RailwayIzzatnagarIZN18
Northeast Frontier RailwayNew GuwahatiNGC40
SiliguriSGUJ142
North Western RailwayBhagat Ki KothiBGKT102
Abu RoadABR64
Southern RailwayGolden RockGOC35
South Central RailwayKazipetKZJ155
GootyGY113
South Eastern RailwayBondamundaBNDM70
SantragachiSRC6
South East Central RailwayRaipurR148
South Western RailwayKrishnarajapuramKJM38
HubliUBL191
Western RailwaySabarmatiSBT95
Total Locomotives Active as of 01-12-2021[2]1756

See also

References
  1. "GM EMD: GT46MAC". Archived from the original on 2004-03-03. Retrieved 2006-11-19.
  2. "Railway Website Mechanical Department". Retrieved 16 May 2020.
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