Indian locomotive class WDP-4

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WDP-4
Tughlakabad DLS based WDP-4D #40109.
Type and origin Power type Diesel-electric Builder EMD & BLW Model GT46PAC (2000-2007) GT46PACe (2007-2012) JT46PACe (2010-2017) Build date (EMD) 2000-2001 (DLW) 2003-2017 Total produced WDP-4: 100 WDP-4B: 86 WDP-4D: 525 (Production has stopped)
Specifications Configuration: ​  • UIC Co′Co′  • Commonwealth Co-Co Gauge 5 ft 6 in (1,676 mm) Trucks high adhesion HTSC (High Tensile Steel Cast) Wheel diameter 1,092 mm (43.0 in) Axle load WDP-4 : 19.5 t (19.2 long tons; 21.5 short tons) WDP4B : 20.2 t (19.9 long tons; 22.3 short tons) WDP4D : 20.5 t (20.2 long tons; 22.6 short tons) Loco weight WDP4 : 115.8 t (114.0 long tons; 127.6 short tons) WDP4B : 117 t (115 long tons; 129 short tons) WDP4D : 123 t (121 long tons; 136 short tons) Fuel type Diesel fuel Fuel capacity 5,000–6,100 L (1,100–1,300 imp gal; 1,300–1,600 US gal) Prime mover EMD 16-710G3B RPM range 200 - 954 rpm ​  • RPM low idle 200 rpm  • RPM idle 269 rpm  • Maximum RPM 954 rpm Engine type 2-stroke V16 diesel Aspiration turbocharged Displacement 186.16 L (11,360 cu in) Alternator WDP4 / WDP4B : GM TA-17 (main) with CA-6B (companion) WDP4D : EMD TA-17 (main) with C6AB (companion) or BHEL TA 9901 (main) with AA 9201 (companion) Traction motors WDP4 : Siemens 1TB2622-0TB02 WDP4B : Siemens 1TB2622-0TA02 or EMD A 2916-8 WDP4D : Siemens 1TB2525-0TA02 or EMD A 2916-8 ​  • Continuous 1250 Amps DC Cylinders 16 Transmission AC Electric Gear ratio 17:77 Loco brake Air, Handbrake, Blended (not in WDP4), Dynamic brake Train brakes Graduated Release Twin Pipe Air Brakes (IRAB-1 Compatible)
Performance figures Maximum speed WDP-4 : Service : 160 km/h (99 mph) Testing : 180 km/h (110 mph) WDP-4B : 130 km/h (81 mph) WDP-4D : 135 km/h (84 mph) Power output 4,000 hp (2,980 kW) (WDP4) 4,500 hp (3,360 kW) (WDP4B) 4,500 hp (3,360 kW) (WDP4D) Tractive effort WDP-4 : 27,550 kgf (270.2 kN) WDP-4B : 40,775 kgf (399.87 kN) WDP-4D : 43,788 kgf (429.41 kN)
Career Operators Indian Railways Numbers 20000 - 20103, 40001 - 40608 Locale India
Unless specified otherwise, data is obtained from RDSO diagram books, given in references.

The Indian locomotive class WDP-4 (EMD GT46PAC) is a passenger-hauling diesel-electric locomotive with AC electric transmission designed by General Motors Electro-Motive Division and built by both GM-EMD and under license by Banaras Locomotive Works (BLW) of Varanasi, India for Indian Railways as the classes WDP4, WDP4B and WDP4D.^[1] The GT46PAC is a passenger version of the previous Indian Railways EMD GT46MAC freight locomotive. The locomotive has a 16-cylinder 710G3B diesel engine and is one of the fastest diesel-electric locomotives in service in Indian Railways.^[2]