Indian locomotive class WDG-3A

Specifications
Specifications
Configuration:;
• UIC	Co-Co
Gauge	1,676 mm (5 ft 6 in)
Bogies	High adhesion Fabricated bogies
Wheel diameter	1,092 mm (3 ft 7 in)
Wheelbase	12.834 m (42 ft 1+1⁄4 in)
Length	17.85 m (58 ft 6+3⁄4 in)
Width	3.016 m (9 ft 10+3⁄4 in)
Height	4.162 m (13 ft 7+7⁄8 in)
Axle load	23,500 kg (51,800 lb)
Loco weight	127 t (125 long tons; 140 short tons)
Fuel type	Diesel
Fuel capacity	6,000 L (1,300 imp gal; 1,600 US gal)
Prime mover	ALCO 251-C
RPM range	400–1050 RPM
Engine type	V16 Diesel engine
Aspiration	ABB VTC304-15 or Napier NA 295 IR turbocharger
Traction motors	BHEL TA 10102 CW (new), BHEL TG 10931 AZ(old)
Cylinders	16
Cylinder size	228 mm × 266 mm (8.98 in × 10.47 in) ; bore x stroke
Transmission	Diesel electric
MU working	2
Loco brake	Air dynamic brake
Train brakes	Air, Vacuum and Dual

Type and origin
Type and origin
Power type	Diesel
Builder	BLW, Diesel Loco Modernisation Works
Model	ALCO-251C/ALCO DL560C variant
Build date	1994–2015
Total produced	WDG-3A: 1,998
Rebuilder	Diesel Loco Modernisation Works, Patiala

WDG-3A
WDG-3A
	Katni based WDG-3A at Bangarpet Jn.
Power type
Type and origin
Power type	Diesel
Builder	BLW, Diesel Loco Modernisation Works
Model	ALCO-251C/ALCO DL560C variant
Build date	1994–2015
Total produced	WDG-3A: 1,998
Rebuilder	Diesel Loco Modernisation Works, Patiala
Configuration:;
Specifications
Configuration:;
• UIC	Co-Co
Gauge	1,676 mm (5 ft 6 in)
Bogies	High adhesion Fabricated bogies
Wheel diameter	1,092 mm (3 ft 7 in)
Wheelbase	12.834 m (42 ft 1+1⁄4 in)
Length	17.85 m (58 ft 6+3⁄4 in)
Width	3.016 m (9 ft 10+3⁄4 in)
Height	4.162 m (13 ft 7+7⁄8 in)
Axle load	23,500 kg (51,800 lb)
Loco weight	127 t (125 long tons; 140 short tons)
Fuel type	Diesel
Fuel capacity	6,000 L (1,300 imp gal; 1,600 US gal)
Prime mover	ALCO 251-C
RPM range	400–1050 RPM
Engine type	V16 Diesel engine
Aspiration	ABB VTC304-15 or Napier NA 295 IR turbocharger
Traction motors	BHEL TA 10102 CW (new), BHEL TG 10931 AZ(old)
Cylinders	16
Cylinder size	228 mm × 266 mm (8.98 in × 10.47 in) ; bore x stroke
Transmission	Diesel electric
MU working	2
Loco brake	Air dynamic brake
Train brakes	Air, Vacuum and Dual
Maximum speed
Performance figures
Maximum speed	105 km/h (65 mph)
Power output	WDG-3A: 3,100 hp (2,300 kW)
Tractive effort	37.90 t (37 long tons; 42 short tons)
Factor of adh.	0.33
Operators
Career
Operators	Indian Railways
Numbers	14501-14999, Newer 13000-13665
Nicknames	Shakti, Prabal, Jai Jawan
Locale	throughout Indian Railways
First run	1994
Retired	Early 2020s–present
Preserved	1
Disposition	In service

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 highly 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 WAGC-3 or WAG-10.