Indian locomotive class WDM-3D

The Indian locomotive class WDM-3D is a class of diesel-electric locomotive that was developed in 2003 by Diesel Locomotive Works (DLW), Varanasi for Indian Railways. The model name stands for broad gauge (W), Diesel (D), Mixed traffic (M) engine with 3300 horsepower (3D). They entered service in 2003. A total of 590+ WDM-3D were built at Diesel Locomotive Works (DLW), Varanasi between 2003 and 2016.

Indian locomotive class WDM-3D
WDM-3D class hauling Okha - Rameswaram Express
Type and origin
Power typeDiesel
BuilderDLW
ModelDL560C
Build date2003-2016
Total produced590+20 Rebuilted from WDM-3B
Specifications
Configuration:
​
 • UICCo-Co, Co'Co'
Gauge1,676 mm (5 ft 6 in)
BogiesAlco High-Adhesion bogies
Wheel diameter1,092 mm (3 ft 7 in)
Wheelbase12.834 m (42 ft 1 1⁄4 in)
Length18.626 m (61 ft 1 1⁄4 in)
Width2.95 m (9 ft 8 1⁄8 in)
Height4.077 m (13 ft 4 1⁄2 in)
Axle load19,500 kg (43,000 lb)
Loco weight117,000 kg (258,000 lb)
Fuel typeDiesel
Fuel capacity6,000 L (1,300 imp gal; 1,600 US gal)
Prime moverALCO 251-B
RPM range390rpm-400rpm idling, 1050rpm at 8th notch
Engine typeV16 diesel
AspirationTurbo-supercharged
Traction motorsBHEL 5002AZ CGL 7362A
Cylinders16
Cylinder size228 mm × 266 mm (8.98 in × 10.47 in)
bore x stroke
TransmissionDiesel-electric transmission
MU working2
Train brakesAir and Dual
Performance figures
Maximum speed160 km/h (99 mph)
Power outputMax:3,300 hp (2,500 kW)
Site rated:2,430 hp (1,810 kW)
Tractive effort36.03 t (35 long tons; 40 short tons)
Career
OperatorsIndian Railways
Numbers11101 - 11590
LocaleAll over Indian Railways
Dispositionactive

The WDM-3D is one of the most successful locomotives of Indian Railways serving both passenger and freight trains. A few WDM-3D units were exported to neighboring countries like Sri Lanka. A significant number of these locomotives are still in use, both on mainline and departmental duties. As of January 2020, most of the locomotives still retain "operational status" on the mainline as WDM-3D, with further examples having been converted from WDM-3B.

History

WDM-3D was developed in by Diesel Locomotive Works and Research Design and Standards Organisation in 2003. It was the result of DLW integrating the best features of EMD GT46MAC and EMD GT46PAC with the alco platform.[1][2] The first one was built in July, 2003, numbered #11101. The first few units (five) were all homed at krishnarajapuram but were later transferred to Erode. Serial production started in late 2005[3] with locos being allotted to almost all major BG diesel sheds. Earlier WDM3Ds had issues with their electronics which probably led to the development of the WDM3B in 2005, the same WDM3D without microprocessor control. The class is considered successful with over 590 units being built. The production has now ceased as DLW has moved to manufacturing more Advanced locos. One unit #11121[4] has a modified short hood, similar to WDP-4 and is homed at Erode.

Specification

It is the higher-powered version of the Indian locomotive class WDM-3A. These locos have a 3300 hp power pack, with maximum available traction power of 2925 hp. The engine is an enhanced version of the 16-cylinder Alco 251C model with a max. speed of 160 km/h. The bogies are Improved Fabricated (welded) Alco High-Adhesion Co-Co bogies with stem type vertical and lateral dampers in place of 'eye' type which helps reduce wheel slip and maintenance of [5]

The loco features left hand drive, WDG-3A style High Adhesion bogies, air cylinder under footboard, WDP-4 style fuel tanks, engine doors like WDP-4, marker lights outside cabin doors, electronic horn, High capacity buffers. Components and auxiliaries have been improved with the aim of making the duty schedule longer between maintenance visits to the shed.

Locomotive Sheds:
ZoneNameShed CodeQuantity
Central RailwayPunePA36
KalyanKYN21
Eastern RailwayHowrahHWH23
East Central RailwaySamastipurSPJ43
East Coast RailwayVisakhapatnamVSKP14
Northern RailwayLucknowLKO59
North Central RailwayJhansiJHS29
North Eastern RailwayIzzatnagarIZN37
Northeast Frontier RailwayMalda TownMLDT15
New GuwahatiNGC11
Southern RailwayErodeED51
South Central RailwayGootyGY22
GuntakalGTL30
South Eastern RailwayBondamundaBNDM15
South Western RailwayKrishnarajapuramKJM4
Western RailwayRatlamRTM19
VatvaVTA32
West Central RailwayItarsiET43
New Katni JunctionNKJ8
Total Locomotives Active as of 01-06-2020[6]512

Sri Lanka
Class M10
Main article: Sri Lanka Railways M10

Ten WDM-3D locomotives were purchased by Sri Lanka Railways in 2012. They were the longest and most powerful locomotives owned by Sri Lanka Railways at that time. They were allocated the M10 class.[7] However some specifications are somewhat different for SLR.[8] This class was used for the construction work of Talaimannar and Kankasanthurei railway lines. After extending the northern line to Jaffna and beyond, M10s were used for passenger services including Yal Devi on the northern line.

  • Smoking MLDT WDM3D doing shunting duties at Katihar
  • JHS WDM - 3D
  • ET WDM-3D twins
  • WDM3B 14155 (LKO) NR with KYQ - GIMB Exp 1

See also

References

Notes
  1. https://www.dlw.indianrailways.gov.in/works/uploads/File/WDM3D.pdf
  2. https://www.aitd.net.in/pdf/7/10.%20Locomotive%20Design%20Centre%20-%20RDSO.pdf
  3. https://www.dlw.indianrailways.gov.in/works/uploads/File/WDM3D.pdf
  4. https://www.irfca.org/apps/locos/show/7667?authenticity_token=aWyb4pHgTMZmk1EjFT9DQH%2FSrQpL1Xdto0XGa2%2BoUqU%3D&loco_class_id=33
  5. https://www.dlw.indianrailways.gov.in/works/uploads/File/WDM3D.pdf
  6. "Railway Website Mechanical Department". Retrieved 16 May 2020.
  7. https://slrailinfo.wordpress.com/locomotives/class-m/class-m10/
  8. https://locolanka.blogspot.com/2015/05/m10.html

Bibliography
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