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Indian locomotive class WDG-4

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EMD GT46MAC(4000hp)/ GT46ACe(4500hp)
WDG4: 12029 in January 2011
Type and origin
Power typeDiesel-electric
BuilderEMD
DLW
ModelGT46MAC
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
SGUJ based WDG4
Hubli(UBL) WDG4 12069 at Toranagallu Jn
Siliguri (SGUJ) based WDG4
Gooty (GY) based WDG 4 locomotives
Siliguri (SGUJ) based WDG 4 locomotives
Pune (PA) based WDG-4

The 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.[2] 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.[3]

Further construction has been under license in India by the Diesel Locomotive Works (DLW); more than 60 additional locomotives have been built as of 2006.[2] 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. Also WDG 4's newer version and dual cab locomotive WDG 4D are better to drive and it has more power.

History

WDG4: first started operations in 1999 with the numbering starting from 12001 (this loco can still be seen in a splendid condition and is homed at the parent shed of Hubli) Hubli Diesel Locomotive Shed has been operational since 1999, and it houses the maximum number of WDG-4s from 12001-12064, 12067-12153, 12156, 12169, 12189, 12227, 12276, 12311–12313, 12325, 12326. The original WDG-4s from 12001–12021 were imported and later on DLW started manufacturing it indigenously. With six traction motors, this locomotive has the capability of touching 105 km/h (65 mph) with a fully loaded freight train of 58 wagons. The locomotive has been praised for its ability to work smoothly in regions with massive gradients, especially in the (Braganza Ghats) and the Subrahmanya ghats having a gradient of 1:37 and 1:50 respectively.


Locomotive sheds

Zone Name Shed Code Quantity
Central Railway Pune PA 90
Kalyan KYN 23
Eastern Railway Andal UDL 46
Jamalpur JMP 16
East Central Railway Patratu PTRU 89
East Coast Railway Visakhapatnam VSKP 121
Northern Railway Tughlakabad TKD 15
Ludhiana LDH 23
Lucknow LKO 60
North Central Railway Jhansi JHS 18
North Eastern Railway Gonda GD 22
Izzatnagar IZN 47
Northeast Frontier Railway New Guwahati NGC 30
Siliguri SGUJ 132
North Western Railway Bhagat Ki Kothi BGKT 97
Abu Road ABR 49
Southern Railway Erode ED 8
Golden Rock GOC 27
South Central Railway Kazipet KZJ 96
Gooty GY 120
South Eastern Railway Bondamunda BNDM 95
South East Central Railway Raipur R 118
South Western Railway Krishnarajapuram KJM 14
Hubli UBL 147
Western Railway Sabarmati SBT 175
West Central Railway Itarsi ET 3
New Katni Junction KTE 68
Total Locomotives Active as of 01-08-2020[4] 1749

Conversion to electric traction

Main article: Indian locomotive class WAG-11

In November 2018, Diesel Locomotive Works , Research Design and Standards Organisation designed and produced a new twin section 12,000HP (8,950 kW) electric locomotive.It has been converted from WDG-4 class diesel locomotive to a new class of Electric locomotive WAG-11.Only 3 units has been produced till now and all are in trials with RDSO.Sheds are yet to be given.

See also

References

  1. ^ "GM EMD: GT46MAC". Archived from the original on 2004-03-03. Retrieved 2006-11-19.
  2. ^ a b "[IRFCA] Indian Railways FAQ: Diesel Locomotive Classes – Broad Gauge". Retrieved 2006-11-19.
  3. ^ "[IRFCA] Indian Railways FAQ: IR History, Part 6". Retrieved 2006-11-19.
  4. ^ "Railway Website Mechanical Department". Retrieved 16 May 2020.{{cite web}}: CS1 maint: url-status (link)
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