WDG-4
GT46MAC - WDG-4s at Castlerock
Type and origin
Power typeDiesel-electric
BuilderEMD
BLW
ModelGT46MAC (1997-2007)
GT46ACe (2007-2016)
JT46ACe (2013-2018)
Build date(EMD) 1997–1998
(BLW) 2002–2018
Total producedWDG-4: 1188
WDG-4D: 583 Under License (Production has stopped)
Specifications
Configuration:
  UICCo′Co′
  CommonwealthCo-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 moverEMD 16-710G3B
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, Down-tweaked to 3,250 HP (2.4 MW) using a v12-710 prime mover]
NumbersWDG-4 :- 12001 - 12999 & 70001 - 70190
WDG-4D :- 12681 & 70301 - 70882

The Indian locomotive class WDG-4 (EMD GT46MAC) is a type of six-axle (Co-Co) 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. Derived from the EMD SD70MAC, it is powered by a 4,000 hp (3,000 kW) 16-cylinder 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. This locomotive is also famous for, and can be identified by the distinct Jet Aeroplane-like sounding capability of its EMD 710 prime mover.

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 August 2007, 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, 4,500 hp (3.4 MW), 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 February 2013, 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 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.

Locomotive sheds

Zone Name Shed Code Quantity
WDG-4 WDG-4D
Central RailwayPunePA 72 18
KalyanKYN(D) 16 17
Eastern RailwayAndalUDL 81 32
East Central RailwayPatratuPTRU 45 44
East Coast RailwayVisakhapatnamVSKP(D) 39 82
Northern RailwayLudhianaLDH(D) 10
LucknowLKO 48 20
TughlakabadTKD (D) 29 26
North Eastern RailwayIzzatnagarIZN 2
Northeast Frontier RailwayNew GuwahatiNGC 7 19
SiliguriSGUJ 127 29
North Western RailwayBhagat Ki KothiBGKT 96 1
Abu RoadABR 36 33
Southern RailwayPonmalai GoldenrockGOC 37 8
South Central RailwayKazipetKZJ(D) 58 77
GootyGY 76 8
VijayawadaBZA(D) 36 9
Moula AliMLY 17 2
South Eastern RailwayBondamundaBNDM(D) 42 42
South East Central RailwayRaipurR 84 44
South Western RailwayKrishnarajapuramKJM 28
HubliUBL 161 40
Western RailwaySabarmati SBT 27 1
West Central RailwayItarsiET(D) 22 31
Total Locomotives Active as of October 2023[2] 1749

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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