EMD GT46PAC
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The EMD GT46PAC or WDP-4 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 as their classes WDP-4, WDP-4B and WDP-4D.[2] The GT46PAC is a passenger version of the previous Indian Railways EMD GT46MAC freight locomotive. The locomotive has a 16-cylinder 710G3B diesel engine with a maximum speed of 904 RPM.[3]
Contents
1 Variants
2 Numbering
3 Performance
4 Builders
5 Use
6 Sheds
6.1 Hubli
6.2 Krishnarajapuram
6.3 Golden Rock
6.4 Erode
6.5 Siliguri
6.6 Bhagat Ki Kothi
6.7 Tughlakabad
6.8 Itarsi
6.9 Gooty
6.10 Pune
6.11 Kalyan
6.12 Others
7 Criticism
8 See also
9 References
10 External links
Variants
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)126 t (124 long tons; 139 short tons) weighted loco with a single cab and the newest WDP-4D which is a 4,500 hp (3,360 kW) loco with dual cabs.[4]
Numbering
The locomotives are numbered from Road No. 20000 upwards till 20103 and further numbering of the loco along with its WDP-4B/4D variants has started from the 40XXX series. This is due to the numbering of the 20XXX series almost breaching the start of numbering of another locomotive class, the WCG-2 which is a DC electric locomotive whose numbering started from 20105.[5]
Performance
The WDP-4 is capable of hauling 24 coach trains at 110–130 km/h (68–81 mph). It has been also used for Spanish Talgo trial run at speed of 180km/h.
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 (more similar to WDG-4), unlike the original which has a Bo-1-1-Bo arrangement with four traction motors. Due to some visibility hindrances faced by loco pilots in driving long hood front, the basic WDP-4B model has been modified to dual cab to eliminate any such possibility. The other features of the WDP-4B and the WDP-4D are the same. The newer cabs have slightly wider profiles to improve visibility.
Some of the WDP-4B/WDP-4D locomotives have been spotted having a provision for an inverter-driven head-end power unit which allows trains to be run without an End-on generating car (EOG) for hotel power.[6]
The loco is very fuel efficient and has minimal exhaust emissions unlike ALCO based locomotives, thanks to its 2 stroke high efficiency diesel engine[citation needed].
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.[7]
Use
The WDP-4B class variant of GT46PAC
The locomotive is used on the following zones of Indian Railways:
- South Western Railway
- Southern Railway
- Central Railway
- South Central Railway
- Northern Railway
- North Western Railway
- Northeast Frontier Railway
Konkan Railway (WDP-4 & WDP-4D of KJM, GOC, KYN and UBL are used in this zone)
West Central Railway ( WDP-4, WDP-4B & WDP-4D of Itarsi shed and WDG-4/WDG-4D of Katni Shed are used in this zone.)- East Central Railway
- Eastern Railway
East Coast Railway (WDP4, WDG4, WDP4D and WDG4D of VSKP- Vishakhapatnam shed are used in this railway zone)
Sheds
This locomotive is currently housed at eight sheds in the Indian Railways, spread across the country which are Hubli (Code:UBL) and Krishnarajapuram (Code:KJM) in the South Western Railway zone, Golden Rock(code:GOC) in the Southern Railway Zone, Siliguri (Code:SGUJ) in the Northeast Frontier Railway zone, Bhagat Ki Kothi (Code:BGKT) in the North Western Railway zone, Itarsi (Code:ET) in the West Central Railway, Tughlakabad (Code:TKD) of the Northern Railway, Gooty (Code:GY) in the South Central Railway, Pune (code:PUNE), Kalyan (code:KYN) in Central Railways and Izzatnagar (code:IZN) in the North Eastern Railway, Vishakhapatnam (code:VSKP) in East Coast Railways [8]
Hubli
The Hubli shed is the parent shed of all the EMD sheds in India. The shed homes the largest number of EMD locomotives in India[9] and currently homes locos with following road numbers:
- WDP-4: 20005–20009, 20020,20021,20022,20026,20031, 20032, 20033, 20035 and 20065.
- WDP-4B: 40007–40010,40015,40016,40018,40036,40046 and 40054–40057
- WDP-4D: 40517, 40518, 40519, 40521, 40522, 40542, 40543, 40546, 40547
Krishnarajapuram
The Krishnarajapuram diesel locomotive shed currently homes these locos with the following road numbers:
- WDP-4: 20019, 20023, 20028–20030, 20034, 20036–20046, 20053–20060, 20062, 20067 and 20068
- WDP-4B: 40017, 40065 and 40066.
- WDP-4D: 40226, 40228, 40236–40239, 40240, 40246, 40247, 40278, 40279, 40298, 40305, 40306, 40329, 40330, 40362, 40385, 40387, 40388, 40397, 40398, 40400, 40401, 40415, 40434, 40450, 40451, 40529, 40552
It is also currently homing the 2000th HHP High Horse Power locomotive ever, manufactured by Diesel Locomotive Works, Varanasi. The loco is numbered #40387 and is named "Pratap".
Golden Rock
Golden Rock homes the following:
- WDP-4B: 40063,40064,40067,40068,40075,40077
- WDP-4D: 40093,40099,40100-40103,40105,40106,40114,40115,40133,40441
Erode
Erode Diesel Loco Shed homes the following WDP-4Ds. This is one of the sheds to home only WDP-4Ds
WDP-4D: 40171, 40174, 40175, 40180, 40197, 40198, 40199, 40241, 40242, 40243, 40338,40339, 40488.
Siliguri
WDP-4D 40091 Siliguri at Karimganj Junction railway station hauling 55664 Silchar - Agartala Passenger
Siliguri houses the following locomotives:
- WDP-4: 20000–20004, 20011–20018, 20048–20052, 20061, 20063–20064, 20066, 20069-20073, 20074, 20076, 20079, 20081–20085, 20094
- WDP-4B: 20047, 20075, 40022–40025, 40028, 40029, 40032, 40035, 40037, 40045
- WDP-4D: 40089–40091,40096,40108,40120,40129,40138, 40141.
Bhagat Ki Kothi
Bhagat Ki Kothi homes
- WDP-4: 20085–20099, 20080, 20077, 20078 which are nicknamed 'Aravali' (named after the mountain ranges).
- WDP-4B: 40027, 40030, 40031, 40033, 40034, 40038–40040, 40043, 40044, 40060
- WDP-4D: 40086,40088,40092,40094,40095,40116,40127,40128
Tughlakabad
WDP-4 of Tughlakabad at New Delhi Railway Station
Tughlakabad (Code: TKD) homes
- WDP-4B: 40001, 40003–40006, 40011–40013, 40019–40021, 40049–40051, 40058, 40059,40079
- WDP-4D-40014,40026,40086,40087,40109,40110, 40122,40124,40125,40139
Itarsi
[Itarsi Junction railway station|Itarsi]] (Code: ET) shed homes:
- WDP-4B: 40041, 40042, 40047, 40048 and 40052, 40053, 40061 and 40062.
Gooty
A WDP4D of Gooty Loco Shed hauling Secunderabad to Pune Shatabdi express near Lingampally Railway Station
Gooty (Code:GY) shed homes:
- WDP-4D: 40104,40111,40112,40113,40117,40118,40119,40121,40130,40135,40142,40148,40150,40152,40185,40188,40314,40315,40328
Pune
Pune (code:PUNE) shed homes:
- WDP-4D:40143,40144,40153,40416,40417
Kalyan
Kalyan (code:KYN) shed homes:
- WDP-4D: 40233,40234,40235"Gaurav",40260,40261,40276,40277,40312,40313,40316,40346,40347,40361,40372
Others
A WDP4D of Kalyan loco shed hauling Konark Express near Secunderabad
There are many more sheds that home these locos and are going to home these.Gonda(NE),Izzatnagar(NE),Samastipur(EC),Kalyan(CR),Vatva(WR),RTM(WR),Erode(SR). HOWRAH, JMP (ER), Bondamunda (SE), Raipur (SECR) are the few sheds which have received this class recently and home a smaller number as of now.One by one,most or all sheds are receiving EMD locomotives of both classes,WDP-4D and WDG-4D.
Criticism
The use of the locomotives "long hood forward" has been criticised because the driver might have difficulty in seeing signals. This criticism has been rejected by Indian Railways.[10]
But the solution to this problem is to upgrade all WDP-4 and WDP-4B models from single cabins to WDP-4D models of dual cabins.
Older locomotives of Indian Railways like the WDM-2 models have been upgraded from WDM-2 series to WDM-3 and WDM-3A series, to enhance other shortcomings in design of WDM-2 series.
See also
- Indian Railways
- History of rail transport in India
- Locomotives of India
- Rail transport in India
References
^ http://www.emdiesels.com/emdweb/international/gt46pac.jsp
^ http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,295,329,389,391
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^ "IRFCA".
^ "IRFCA".
^ "IRFCA".
^ "DLW site".
^ "IRFCA".
^ http://www.swr.indianrailways.gov.in/view_section.jsp?lang=0&id=0,1,808,813,814
^ Railway claims engine design not faulty - India News - IBNLive
External links
 | Wikimedia Commons has media related to Indian locomotive class WDP4. |
- EMD specification
- Autocar India has a detailed profile of the WDG-4 locomotive.
- Diesel loco specification at IRFCA website
- Detailed Specifications for the WDP4D
- Detailed Specifications for the WDP4B
- Traction Motor Specifications and Model Numbers
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AC electric |
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| Dual (AC and DC) electric |
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