| WDP-4 |
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KJM based WDP-4D #40555 hauling 16239 CMGR-YPR Express. |
| Type and origin |
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| Power type | Diesel–electric |
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| Builder | EMD & BLW |
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| Model | GT46PAC (2000–2007)
GT46PACe (2007–2012)
JT46PACe (2010–2017) |
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| Build date | (EMD) 2000–2001
(DLW) 2003–2017 |
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| Total produced | WDP-4: 100
WDP-4B: 86
WDP-4D: 525 (Production has stopped) |
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| Specifications |
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Configuration:
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| • UIC | Co′Co′ |
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| • Commonwealth | Co-Co |
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| Gauge | 5 ft 6 in (1,676 mm) |
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| Trucks | high adhesion HTSC (High Tensile Steel Cast) |
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| Wheel diameter | 1,092 mm (43.0 in) |
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| 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) |
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| 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) |
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| Fuel type | Diesel fuel |
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| Fuel capacity | 5,000–6,100 L (1,100–1,300 imp gal; 1,300–1,600 US gal) |
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| Prime mover | EMD 16-710G3B |
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| RPM range | 200 - 954 rpm |
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| • RPM low idle | 200 rpm |
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| • RPM idle | 269 rpm |
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| • Maximum RPM | 954 rpm |
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| Engine type | 2-stroke V16 diesel |
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| Aspiration | turbocharged |
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| Displacement | 186.16 L (11,360 cu in) |
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| 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) |
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| Traction motors | WDP4 : Siemens 1TB2622-0TB02
WDP4B : Siemens 1TB2622-0TA02 or EMD A 2916-8
WDP4D : Siemens 1TB2525-0TA02 or EMD A 2916-8 |
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| • Continuous | 1250 Amps DC |
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| Cylinders | 16 |
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| Transmission | AC Electric |
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| Gear ratio | 17:77 |
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| Loco brake | Air, Handbrake, Blended (not in WDP4), Dynamic brake |
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| Train brakes | Graduated Release Twin Pipe Air Brakes (IRAB-1 Compatible) |
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| Performance figures |
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| 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) |
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| Power output |
- 4,000 hp (2,980 kW) (WDP4)
- 4,500 hp (3,360 kW) (WDP4B)
- 4,500 hp (3,360 kW) (WDP4D)
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| 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) |
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| Career |
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| Operators | Indian Railways |
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| Numbers | 20000 - 20103, 40001 - 40608 |
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| Locale | India |
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| 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. 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.
