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-cylinderEMD 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. This locomotive is also famous for, and can be identified by the distinct Jet Aeroplane-like sounding capability of its 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. A similar type, the
EMD GT46PAC, has also been produced for passenger service in India.
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.
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-cylinderEMD 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. This locomotive is also famous for, and can be identified by the distinct Jet Aeroplane-like sounding capability of its 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. A similar type, the
EMD GT46PAC, has also been produced for passenger service in India.
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.