Indian Railways freight class diesel locomotive
WDG-4 |
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GT46MAC - WDG-4s at Castlerock |
Type and origin |
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Power type | Diesel-electric |
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Builder | EMD BLW |
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Model | GT46MAC (1997-2007) GT46ACe (2007-2016) JT46ACe (2013-2018) |
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Build date | (EMD) 1997–1998 (BLW) 2002–2018 |
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Total produced | WDG-4: 1188 WDG-4D: 583 (Mainline Production has stopped, but happens occasionally for Non-Railway Customers) |
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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 | HTSC |
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Length | 21.26 m (69 ft 9 in) |
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Height | 4.11 m (13 ft 6 in) |
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Axle load | 21,000 kg (46,000 lb) |
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Loco weight | 126,000 kg (278,000 lb) or 126 t (124 long tons; 139 short tons) |
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Fuel type | Diesel fuel |
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Fuel capacity | 6,100 Litres |
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Prime mover | EMD 16-710G3B |
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Engine type | two-stroke V16 diesel |
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Aspiration | turbocharged |
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Displacement | 186.2 liters (11,360 cubic inches) |
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Alternator | TA-17-CA6A AC |
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Traction motors | 1 inverter per truck, AC traction motors |
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Cylinders | 16 |
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Transmission | diesel electric |
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Loco brake | Air |
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Train brakes | Graduated Release Twin Pipe Air Brake, Dynamic Brakes, Blended |
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Performance figures |
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Maximum speed | 105 km/h (65 mph) |
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Power output | 4,000 hp (2,980 kW) / 4,500 hp (3,360 kW) |
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Tractive effort | 540 kN (120,000 lbf) |
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The Indian locomotive class WDG-4 (EMD GT46MAC) is a type of six-axle (Co-Co) freight-hauling diesel-electric locomotive with AC electric transmission designed by General Motors Electro-Motive Diesel[1] in 1997–1998 for Indian Railways, where they are classed as WDG-4. Derived from the EMD SD70MAC, it is powered by a 4,000 hp (3,000 kW) 16-cylinder EMD 710G3B prime mover. Thirteen were built by EMD as order #958647, and a further eight were exported in kit form and assembled in India. The class entered service in 1999. A Dedicated Passenger version of this locomotive, the WDP-4 (EMD GT46PAC), has also been produced, with a Bo1-1Bo Wheel Configuration, which entered service in 2001. These locomotives are also famous for, and can be identified, by the distinct and unique Jet Plane-like sounding capability of the EMD 710 prime mover.
Further construction has been under license in India by the Banaras Locomotive Works (BLW), with the first purely indigenously built WDG-4 locomotive, numbered 12022, that rolled out in 2002. More than 60 additional locomotives have been built as of 2006[update]. They are numbered from #12001 upward.
As of August 2007[update], EMD and DLW have begun building GT46ACe's using IGBT technology to replace the older gate turn-off thyristor technology and along with increase of 500 hp, ie, 4,500 hp (3.4 MW), using the Newly tweaked EMD 16N-710G3B-EC, like the passenger WDP-4B have been produced. Newer versions with widened Piggy-face cab profile for enhanced visibility, just like the later variants of WDP-4's and WDP-4B's were also produced.
As of February 2013[update], DLW began building the Dual Cab version, EMD JT46ACe, called WDG-4D, based on the passenger variant WDP-4D locos, same for both-side visibility. Here again, many features, including IGBT and 4,500 hp have been carried on from the single cab GT46ACe's. The first WDG-4D, numbered 12681, is named "Vijay". Later WDG-4D's were numbered from 70301, as the 12*** series came to an end in 2014 and got switched to 70*** series. Over 1,500 such locomotives, including both WDG-4's and WDG-4D's are currently in operation.
Indian Railways has also developed the WDG-4 series into EMD GT50AC (aka WDG-5), using a v20-710G prime mover, based on the SD80MAC, rated at 5,500 HP (4,130 kW). However, this locomotive has turned out to be a Failure, due to various reasons.
Since the year 2017, BLW (DLW then) began manufacturing such locomotives for Non-Railway Customers. The first such locomotive, which would be a Dual-Cab WDG-4D, rolled out to serve Odisha Power Generation Corporation (OPGC), in March 2017. Three WDG-4D locomotives currently serve OPGC.[as of?] As of 2024, two new Single-Cab Piggy-face WDG-4 locomotives have been manufactured and rolled out for Obra Thermal Power Station, based at Sonbhadra, Uttar Pradesh.
Locomotive sheds
Non-Railway Operators
See also
References
- ^ "GM EMD: GT46MAC". Archived from the original on 2004-03-03. Retrieved 2006-11-19.
- ^ "Railway Website Mechanical Department". Retrieved 16 May 2020.
External links
Wikimedia Commons has media related to EMD GT46MAC locomotives.