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 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 jet-airplane –like sound of the EMD 710 prime mover.
5-513: 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. They are numbered from #12001 upward. As of August 2007, EMD and DLW have begun building GT46ACe's using IGBT technology to replace
10-583: Is a production unit of Indian Railways situated in Varanasi , Uttar Pradesh . DLW was renamed BLW in 2020. Founded in 1956 as the DLW , it manufactures locomotives which are variants based on the original ALCO . In July 2006, it outsourced manufacture of some locomotives to Parel Workshop, Central Railway , Mumbai. DLW was renamed BLW in October 2020. In March 2019, it developed the country's first bi-mode locomotive,
15-587: 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
20-941: 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 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. Banaras Locomotive Works The Banaras Locomotive Works ( BLW ), formerly Diesel Locomotive Works ( DLW ),
25-451: 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, DLW began building
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