EMD GT46PAC - A SHORT ARTICLE
========================
The 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 Diesel Locomotive Works (DLW) of Varanasi, India for Indian Railways.

VARIANTS:...
more...

There are three variants of this loco - the original WDP-4 which is a 4,000 hp (2,980 kW) loco, the WDP-4B which is a 4,500 hp (3,360 kW) loco with a single cab and the newest WDP-4D which is a 4,500 hp (3,360 kW) loco with dual cabs.
NUMBERING: The locomotives are numbered from Road No. 20000 upwards till 20103 and further numbering of the loco along with its WDP-4B variant has started from the 40XXX series.

PERFORMANCE: The WDP-4 is capable of hauling 24 coach trains at 110–120 km/hour. It has also been used for speed trials where it has hauled 8 coach trains at 160 km/hour.
BUILDERS: The first set of 10 locos starting from road number 20000–20009 were manufactured by the Electro Motive Division (EMD) of (General Motors) while road numbers 20011 upwards have been manufactured by Diesel Locomotive Works (DLW) of Varanasi in collaboration with EMD and GM (General motors). Siemens too are part of this group providing a large component of the electronics on board this loco.

FEATURES: The locomotives can be used in either direction, and frequently haul trains long hood forward, as in the picture. Newer editions with 4500 hp have been produced which have been named with the sub class WDP-4B /WDP-4D which have different traction control with six traction motors and are Co-Co bogie equipped, unlike the original which has a Bo-1-1-Bo arrangement with four traction motors. The loco is very fuel efficient and has minimal exhaust emissions due to its 2 stroke diesel engine.
(Source:- Wikipedia)