WDG-3A
Gooty based WDG-3A twins at Braganza Ghats.
Type and origin
Power typeDiesel
BuilderBLW, Diesel Loco Modernisation Works
ModelALCO-251C/ALCO DL560C variant
Build date1994-2015
Total producedWDG-3A: 1,998
RebuilderDiesel Loco Modernisation Works, Patiala
Specifications
Configuration:
​
 • UICCo-Co
Gauge1,676 mm (5 ft 6 in)
BogiesHigh adhesion Fabricated bogies
Wheel diameter1,092 mm (3 ft 7 in)
Wheelbase12.834 m (42 ft 1+1⁄4 in)
Length17.85 m (58 ft 6+3⁄4 in)
Width3.016 m (9 ft 10+3⁄4 in)
Height4.162 m (13 ft 7+7⁄8 in)
Axle load23,500 kg (51,800 lb)
Loco weight127 t (125 long tons; 140 short tons)
Fuel typeDiesel
Fuel capacity6,000 L (1,300 imp gal; 1,600 US gal)
Prime moverALCO 251-C
RPM range400 - 1,050 rpm
Engine typeV16 Diesel engine
AspirationABB VTC304-15 or Napier NA 295 IR turbocharger
Traction motorsBHEL TA 10102 CW (new), BHEL TG 10931 AZ(old)
Cylinders16
Cylinder size228 mm × 266 mm (8.98 in × 10.47 in)
bore x stroke
TransmissionDiesel electric
MU working2
Train brakesAir, Vacuum and Dual
Performance figures
Maximum speed105 km/h (65 mph)
Power outputWDG-3A: 3,100 hp
Tractive effort37.90 t (37 long tons; 42 short tons)
Factor of adh.0.33
Career
OperatorsIndian Railways
Numbers14501-14999, Newer 13000-13665
NicknamesShakti, Prabal, Jai Jawan
Localethroughout Indian Railways
Dispositionactive

The Indian locomotive class WDG-3A is a class of diesel-electric locomotive that was developed in 1994 by Banaras Locomotive Works (BLW),Varanasi for Indian Railways. The model name stands for broad-gauge (W), Diesel (D), Goods traffic (G) engine, 3,100 hp (3A) locomotive. They entered service on 18 July 1995. A total of 1,164 WDG-3A units were built between 1994 and 2015 at BLW, Varanasi with a few units being produced by Diesel Loco Modernisation Works (DLMW) and Parel Workshop.

It is the dedicated freight version of the very successful WDM-2 and shares the same engine and horsepower rating with WDM-3A. It is considered to be a successful locomotive class with high reliability and few maintenance problems. Despite the introduction of more modern types of locomotives like WDG-4 and electrification, a significant number are still in use, both in mainline and departmental duties.

As of September 2023, 787 locomotives still retain "operational status" on the mainline as WDG-3A, with a few examples having been converted to WAGC3 or WAG-10.

History

The first units of this class was delivered on July 18, 1995, under the name of WDG-2.[1] The class was manufactured till end of 2015. All the older locomotives built by DLW had regular WDM-2 type square short hood profile and control stand position and the locomotives are rated at 3,100 HP.

From 2009 onward, they are equipped with Daulat Ram DBR, microprocessor control and an Auxiliary Power Unit (APU) in the short hood thus they bear external resemblance to the WDM-3D class.[2][3] The WDG3A has higher Tractive Effort (7.5 t more) and Axle Load (1.7 t) compared to the WDM3A despite having the same engine and horsepower rating. Many units of this class has been named "Shakti" and can easily be recognized by their orange livery with cream stripe & lightning bolts. Besides IR, WDG-3A are being use by private companies for industrial uses, thermal power plants, port trusts, etc.

Production was stopped in 2015 when Advanced locomotives like the WDG-4D were built, thus rendering the ALCO platform obsolete. Two WDG-4s can haul more goods than three WDG-3A combined. Meanwhile, Diesel Loco Works in Varanasi rebuilt few of the existing locomotives that had reached midlife into a purely electric twin section 10,000 hp (7,457 kW) locomotive, classifying them as the WAGC3.

The retirement of this class has begun due to electrification.

Sub Classes

WDG-3B

They were an experimental technical variant of the WDG3A with an upgraded ALCO engine to output 3,200 hp. But the experiment was unsuccessful and all units were reverted to normal WDG-3A. One of the locomotives of this class was numbered #14796.[4]

WDG-3C

Another experimental class, but this time rated at 3300 hp. Only one unit (#14962) was produced and was painted in a unique "Dark Rose/Cheetah" livery.[5][6] This loco was derated to 2,600 hp, but is still with the Katni diesel locomotive shed. This class was unsuccessful as well.

WDG-3D

Freight version of the WDM-3D. Only one (#13301) unit was marked with this marking. It may possibly be rated at 3400 hp.[7][8] Now it has been derated to 2600 hp with WDG-3A class markings and homed at the Vatva Loco Shed.

Locomotive sheds

ZoneNameShed CodeQuantity
Central RailwayPunePA20
KalyanKYN (D)35
KurlaCLA12
Eastern RailwayAndalUDL13
JamalpurJMP40
East Central Railway Pt. Deendayal UpadhyayaDDU (D)4
SamastipurSPJ22
East Coast RailwayVisakhapatnamVSKP (D)43
Northern RailwayLudhianaLDH (D)48
LucknowLKO25
TughlakabadTKD (D)10
North Central RailwayJhansiJHS (D)25
North Eastern RailwayIzzatnagarIZN2
Northeast Frontier RailwayMalda TownMLDT19
GuwahatiNGC51
North Western RailwayAbu RoadABR24
Southern RailwayErnakulamERS18
Golden RockGOC22
TondiarpetTNP2
South Central RailwayGuntakalGTL (D)26
VijayawadaBZA (D)16
Moula AliMLY42
South Eastern RailwayBondamundaBNDM (D)62
South East Central RailwayMotibaghMIB34
South Western RailwayKrishnarajapuramKJM21
Western RailwayRatlamRTM36
SabarmatiSBI27
West Central RailwayNew Katni Jn.NKJ (D)16
Total Locomotives Active as of December 2023[9]715

WDG-3A Converted into Electric Locomotive WAGC-3

In 2018, Chittaranjan Locomotive Works, Banaras Locomotive Works and Research Design and Standards Organisation converted a WDG-3A into a purely electric, twin-section 10,000 hp (7,457 kW) locomotive, classified as the WAGC3.[10] This locomotive was the result of the initiative taken up by the Railway Board in November 2017, asking RDSO to work out details of conversion of diesel locos to electric locos. RDSO had suggested that such conversion would be possible with retaining the Motorized Truck assembly (which includes traction motors and drive side traction converters), computer controlled brakes (CCBs) and other relevant parts, suitably redesigning the under-frame and superstructure and adding the conversion kit. It was completed in only 69 days.[11][12] Both units will together be considered as one asset and one locomotive by Indian Railways. Only a single unit has been produced so far and it is in service. It has been given to Bondamumda Shed of SER.

Technical specifications

Technical details are as follows:[13][14]

Manufacturers DLW
Engine Alco 251-C, 16 cylinder, 3,100 hp (2,300 kW), (3,007 hp or 2,242 kW site rating, earlier 2,900 hp (2,200 kW)) with Napier NA2951R/ ABB VTC-304-VG15/ GE 7s 1716 turbo supercharged engine. 1,050 rpm max, 400 rpm idle; 228.6 mm × 266.7 mm (9.00 in × 10.50 in) bore x stroke; compression ratio 12.5:1. Direct fuel injection, centrifugal pump cooling system (2,457 L/min (540 imp gal/min; 649 US gal/min) at 1,050 rpm), fan driven by eddy current clutch (90 hp or 67 kW at 1,050 rpm)
Governor EDC / Woodward 8574-650
Transmission Electric, with BHEL TA 10102 CW alternator (1,050 rpm, 1,100 V, 4,400 amperes) (Earlier used BHEL TG 10931 AZ alternator)
Traction motors BHEL TM 4906 AZ/ 4907 BZ (435 hp or 324 kW) (with roller bearings)
Axle load 18.8 tonnes (18.5 long tons; 20.7 short tons), total weight 112.8 t (111.0 long tons; 124.3 short tons)
Bogies Alco High Adhesion Fabricated Bogies
Starting TE 40 t (39 long tons; 44 short tons) at adhesion 30.8%, continuous 37.05 t (36.46 long tons; 40.84 short tons)
Length over buffer beams 17,850 mm (58 ft 6+3⁄4 in)
Distance between bogies 11,500 mm (37 ft 8+3⁄4 in)

See also

References

  1. ↑ "IR History: Part - V (1970-1995)". Indian Railways Fan Club. Retrieved 22 August 2017.
  2. ↑ "Company Profile" (PDF). indianrailways.gov.in. Indian Railways. Retrieved 2 March 2018.
  3. ↑ "Motive Power" (PDF). indianrailways.gov.in. RDSO. 2018. Retrieved 2 March 2018.
  4. ↑ Theevandi (6 January 2014). "Diesel Locomotive Roster – The WDP and WDG Series!". 24 Coaches. Retrieved 29 June 2019.
  5. ↑ "wdg3_cheetah.jpg". www.irfca.org. Retrieved 29 June 2019.
  6. ↑ "agf_trip2.jpg". www.irfca.org. Retrieved 29 June 2019.
  7. ↑ "WDG-3D #13301".
  8. ↑ "[IRFCA] Indian Railways Locomotive Roster Vatva (VTA) WDG-3A 13301 Show". www.irfca.org. Retrieved 29 June 2019.
  9. ↑ "Railway Website Mechanical Department". Retrieved 16 May 2020.
  10. ↑ "Indian Railways creates history! Converts diesel loco to 'Make in India' electric locomotive; watch video". The Financial Express. 3 March 2018. Retrieved 1 October 2018.
  11. ↑ "DLW/Varanasi converts WAGC3-class Diesel Locomotive from Diesel to Electric Traction – RailNews Media India Ltd". Retrieved 29 June 2019.
  12. ↑ Singh, Binay (3 March 2018). "Diesel Locomotive Works (DLW): Indian Railways creates history by converting diesel locomotive into electric India". The Times of India. Retrieved 29 June 2019.
  13. ↑ "Diesel Locomotive Classes – Broad Gauge". Indian Railways Fan Club.
  14. ↑ "WDG3A - 3100 HP Goods Locomotive" (PDF). Archived from the original (PDF) on 15 December 2017. Retrieved 22 June 2019.
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