Indian locomotive class WDP-4: Difference between revisions

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Created page with "{{Short description|Passenger-hauling diesel-electric locomotive with AC electric transmission}} {{more citations needed|date=October 2015}} {{Infobox locomotive | name = WDP-4 | powertype = Diesel-electric | image = EMD-GT46PAC-WDP4.jpg | caption = <div> *Top: UBL WDP4 20005 in Cab Forward mode *Below: KJM WDP4 20044 in Hood Forward mode. </div> | builder = EMD & BLW | serialnumber = | buildmodel = List of EM..."
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{{Short description|Passenger-hauling diesel-electric locomotive with AC electric transmission}}
{{Short description|Indian Railways passenger class diesel locomotive}}
{{more citations needed|date=October 2015}}
{{more citations needed|date=October 2015}}
{{Infobox locomotive
{{Infobox locomotive
| name = WDP-4
| name           = WDP-4
| powertype = [[Diesel-electric]]
| powertype       = [[Diesel–electric]]
| image = EMD-GT46PAC-WDP4.jpg
| image           = KJM WDP4D.jpg
| caption = <div>
| caption         = KJM based WDP-4D hauling Chamrajnagar - Tumakuru Passenger.
*Top: UBL WDP4 20005 in Cab Forward mode
| builder         = [[Electro-Motive Diesel|EMD]] & [[Banaras Locomotive Works|BLW]]
*Below: KJM WDP4 20044 in Hood Forward mode.
| serialnumber   =  
</div>
| buildmodel     = [[List of EMD locomotives|GT46PAC]] (2000–2007) <br> [[List of EMD locomotives|GT46PACe]] (2007–2012) <br> [[List of EMD locomotives|JT46PACe]] (2010–2017)
| builder = [[Electro-Motive Diesel|EMD]] & [[Banaras Locomotive Works|BLW]]
| builddate       = (EMD) 2000–2001<br /> (DLW) 2003–2017
| serialnumber =  
| totalproduction = WDP-4: '''100''' <br /> WDP-4B: '''86''' <br /> WDP-4D: '''525'''
| buildmodel = [[List of EMD locomotives|GT46PAC]]
|Britishclass=Bo1-1Bo, later [[Co-Co locomotive|Co-Co]]
| builddate = (EMD) 2001<br /> (DLW) 2003-2010
|uicclass=Bo1'-1Bo', later Co'-Co'
| totalproduction = '''WDP-4:''' 100<br />'''WDP-4B:''' 86<br />'''WDP-4D:''' 525 Under License (Production has stopped)
| gauge           = {{track gauge|5ft6in|lk=on}}
| uicclass = Co-Co  
| trucks         = high adhesion HTSC (High Tensile Steel Cast)
| gauge = {{track gauge|5ft6in|lk=on}}
| wheeldiameter   = {{convert|1092|mm|in|abbr=on|lk=in}}
| trucks = high adhesion HTSC (High Tensile Steel Cast)
| axleload       = '''WDP-4''' : {{convert|19.5|t|LT ST|abbr=on|lk=in}}<br />'''WDP4B''' : {{convert|20.2|t|LT ST|abbr=on|lk=in}}<br />'''WDP4D''' : {{convert|20.5|t|LT ST|abbr=on|lk=in}}
| wheeldiameter = {{convert|1092|mm|in|abbr=on|lk=in}}
| locoweight     = '''WDP4''' : {{convert|115.8|t|LT ST|abbr=on|lk=in}}<br />'''WDP4B''' : {{convert|117|t|LT ST|abbr=on|lk=in}}<br />'''WDP4D''' : {{convert|123|t|LT ST|abbr=on|lk=in}}
| axleload = '''WDP-4''' : {{convert|19.5|t|LT ST|abbr=on|lk=in}}<br />'''WDP4B''' : {{convert|20.2|t|LT ST|abbr=on|lk=in}}<br />'''WDP4D''' : {{convert|20.5|t|LT ST|abbr=on|lk=in}}
| fueltype       = [[Diesel fuel]]
| locoweight = '''WDP4''' : {{convert|115.8|t|LT ST|abbr=on|lk=in}}<br />'''WDP4B''' : {{convert|121.2|t|LT ST|abbr=on|lk=in}}<br />'''WDP4D''' : {{convert|123|t|LT ST|abbr=on|lk=in}}
| fuelcap         = {{convert|5,000 - 6,100|L|impgal USgal|abbr=on|lk=in}}
| fueltype = [[Diesel fuel]]
| primemover     = [[EMD 710|EMD 16-710G3B]]
| fuelcap = {{convert|5,000 - 6,100|L|impgal USgal|abbr=on|lk=in}}
| rpmrange       = 200 - 954 rpm
| primemover = [[EMD 710|16-710G3B]]
| rpmrange low   = 200 rpm
| rpmrange = 200 - 954 rpm
| rpmrange idle   = 269 rpm
| rpmrange low = 200 rpm
| rpmrange max   = 954 rpm
| rpmrange idle = 269 rpm
| enginetype     = [[Two-stroke engine|2-stroke]] [[V16 engine|V16]] [[Diesel engine|diesel]]
| rpmrange max = 954 rpm
| displacement   = {{convert|186.16|L|cuin|abbr=on}}
| enginetype = [[Two-stroke engine|2-stroke]] [[V16 engine|V16]] [[Diesel engine|diesel]]
| aspiration     = [[Turbocharger|turbocharged]]
| displacement = {{convert|186.16|L|cuin|abbr=on}}
| alternator     = '''WDP4 / WDP4B''' : GM TA-17 (main) with CA-6B (companion)<br />'''WDP4D''' : EMD TA-17 (main) with C6AB (companion) or BHEL TA 9901 (main) with AA 9201 (companion)
| aspiration = [[Turbocharger|turbocharged]]
| tractionmotors = '''WDP4''' : Siemens 1TB2622-0TB02 <br />'''WDP4B''' : Siemens 1TB2622-0TA02 or EMD A 2916-8 <br />'''WDP4D''' : Siemens 1TB2525-0TA02 or EMD A 2916-8
| alternator = '''WDP4 / WDP4B''' : GM TA-17 (main) with CA-6B (companion)<br />'''WDP4D''' : EMD TA-17 (main) with C6AB (companion) or BHEL TA 9901 (main) with AA 9201 (companion)
| t/m amps cont   = 1250 Amps DC
| tractionmotors = '''WDP4''' : Siemens 1TB – 2622  - 0TB02 <br />'''WDP4B''' : Siemens 1TB-2622-0TA02 or EMD A 2916-8 <br />'''WDP4D''' : Siemens 1TB2525 –0TA02 or EMD A 2916-8
| cylindercount   = 16
| t/m amps cont = 1250 Amps DC
| transmission   = [[Diesel–electric transmission|AC Electric]]
| cylindercount = 16
| gear ratio     = 17:77
| transmission = [[Diesel-electric transmission|AC Electric]]
| poweroutput     = <div>
| gear ratio = 17:77
| poweroutput = <div>
*{{convert|4,000|hp|kW|-1|abbr=on}} (WDP4)
*{{convert|4,000|hp|kW|-1|abbr=on}} (WDP4)
*{{convert|4500|hp|kW|-1|abbr=on}} (WDP4B and WDP4D)
*{{convert|4,500|hp|kW|-1|abbr=on}} (WDP4B)
*{{convert|4,500|hp|kW|-1|abbr=on}} (WDP4D)
</div>
</div>
| tractiveeffort = '''WDP-4''' : {{convert|27550|kgf|kN|abbr=on}}
| tractiveeffort = '''WDP-4''' : {{convert|27550|kgf|kN|abbr=on}}
'''WDP-4B''' : {{convert|40775|kgf|kN|abbr=on}}
'''WDP-4B''' : {{convert|40775|kgf|kN|abbr=on}}
'''WDP-4D''' : {{convert|40788|kgf|kN|abbr=on}}
'''WDP-4D''' : {{convert|43788|kgf|kN|abbr=on}}
| maxspeed = '''WDP-4''' :<br /> Service : {{convert|160|km/h|mph|abbr=on}}<br /> Testing : {{convert|180|km/h|mph|abbr=on}}<br />
| maxspeed       = '''WDP-4''' :<br /> Service : {{convert|160|km/h|mph|abbr=on}}<br /> Testing : {{convert|180|km/h|mph|abbr=on}}<br />
'''WDP-4B''' : {{convert|130|km/h|mph|abbr=on}}<br />
'''WDP-4B''' : {{convert|130|km/h|mph|abbr=on}}<br />
'''WDP-4D''' : {{convert|135|km/h|mph|abbr=on}}
'''WDP-4D''' : {{convert|135|km/h|mph|abbr=on}}
| locobrakes = [[Railway air brake|Air]], Handbrake, Blended (not in WDP4), [[Dynamic brake]]
| locobrakes     = [[Railway air brake|Air]], Handbrake, Blended (not in WDP4), [[Dynamic brake]]
| trainbrakes = [[Railway air brake|Graduated Release Twin Pipe Air Brakes]] (IRAB-1 Compatible)
| trainbrakes     = [[Railway air brake|Graduated Release Twin Pipe Air Brakes]] (IRAB-1 Compatible)
| operator = [[Indian Railways]]
| operator       = [[Indian Railways]] <br /> [[SNTF]]([[Algeria]]) - as [[EMD GT26 Series|EMD GT-'''36''' HCW]], with just minor modifications in the body design, along with down-rating the power output to 3,600 HP (2.7 MW) using an [[EMD 645| 16-645 '''F 3B''']], as the number GT-"36"
| fleetnumbers = '''20000 - 20103''', '''40001 - 40608'''
| fleetnumbers   = '''20000 - 20103''', '''40001 - 40608'''
| locale = [[India]]
| locale         = India
| notes = Unless specified otherwise, data is obtained from RDSO diagram books, given in references.
| notes           = Unless specified otherwise, data is obtained from RDSO diagram books, given in references.
}}
}}


The '''EMD GT46PAC''' or '''WDP4''' is a passenger-hauling [[diesel-electric locomotive]] with AC electric transmission designed by [[Electro-Motive Diesel|General Motors Electro-Motive Division]] and built by both GM-EMD and under license by [[Banaras Locomotive Works]] (BLW) of [[Varanasi]], [[India]] for [[Indian Railways]] as the classes WDP4, WDP4B and WDP4D.<ref>http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,295,329,389,391 {{Dead link|date=March 2022}}</ref> The GT46PAC is a passenger version of the previous Indian Railways [[EMD GT46MAC]] freight locomotive. The locomotive has a 16-cylinder 710G3B diesel engine and is one of the fastest diesel-electric locomotives in service in Indian Railways.<ref>{{Cite web|url = http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,295,329,389,391|title = Details from production Factory}}</ref>
The '''Indian locomotive class WDP-4 (EMD GT46PAC)''' is a passenger-hauling [[diesel–electric locomotive]] with AC electric transmission designed by [[Electro-Motive Diesel|General Motors Electro-Motive Division]] and built by both GM-EMD and under license by [[Banaras Locomotive Works]] (BLW) of [[Varanasi]], India for [[Indian Railways]] as the classes WDP4, WDP4B and WDP4D.<ref>{{Cite web |url=http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,295,329,389,391 |title=Welcome to DLW Official Website |access-date=2014-12-09 |archive-date=2014-12-14 |archive-url=https://web.archive.org/web/20141214113303/http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,295,329,389,391 |url-status=dead }}</ref> The GT46PAC is a passenger version of the previous Indian Railways [[EMD GT46MAC]] ('''WDG-4''') freight locomotive. The locomotive has a 16-cylinder 710G3B diesel engine and is one of the fastest diesel–electric locomotives in service in Indian Railways.<ref>{{Cite web|url = http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,295,329,389,391|title = Details from production Factory}}</ref>


== Variants ==
== Variants ==
[[File:KJM WDP4.jpg|left|thumb|KJM based WDP- 4 with  KSR Bengaluru - Shivamogga Town Janshatabdi Express]]
[[File:ERS WDP4D 40103.jpg|thumb|ERS based wDp4d with [[Ernakulam-H.Nizamuddin Duronto Express]]]][[File:BGKT WDP4B.jpg|thumb|BGKT based WDP-4B no. 40031 with an express train]]
=== WDP-4 ===
=== WDP-4 ===
The WDP-4 was the loco originally designed by GM EMD and 10 of them were dispatched to India by June 2001. Later on [[Banaras Locomotive Works]], [[Varanasi]] started building them initially using knocked-down kits and later indigenously. Starting 2003, the locomotives were produced in large numbers by BLW. The locomotive features self diagnostics control using EM2000 onboard microprocessor which was a new technology for Indian Railways back then.
The WDP-4 was the loco originally designed by GM EMD and 10 of them were dispatched to India by June 2001. Later on [[Banaras Locomotive Works]], [[Varanasi]] started building them initially using knocked-down kits and later indigenously. Starting 2003, the locomotives were produced in large numbers by BLW. The locomotive features self diagnostics control using EM2000 onboard microprocessor which was a new technology for Indian Railways back then.
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==== Visibility Issue ====
==== Visibility Issue ====
The use of the locomotive with the long hood forward configuration has been criticised with respect to the driver's visibility as it is affected due to the protruding radiator section at the hood-end. This criticism has been rejected by the Railways.<ref>{{Cite web|title=Railway claims engine design not faulty|url=https://www.news18.com/news/india/ffgfx-report-rail-pro-reax-341832.html|date=2010-06-15|website=News18|access-date=2020-05-15}}</ref> However, in response, the cab profile of some WDP-4s were widened to increase the field of view from the control cab and the WDP-4B variant was also produced with the same widened cab profile.
The use of the locomotive with the long hood forward configuration has been criticised with respect to the driver's visibility as it is affected due to the protruding radiator section at the hood-end. This criticism has been rejected by the Railways.<ref>{{Cite web|title=Railway claims engine design not faulty|url=https://www.news18.com/news/india/ffgfx-report-rail-pro-reax-341832.html|date=2010-06-15|website=News18|access-date=2020-05-15}}</ref> However, in response, the cab profile of some WDP-4s were widened with a ''Piggy-face'' profile, to increase the field of view from the control cab and the WDP-4B variant was also produced with the same widened cab profile.


=== WDP-4B ===
=== WDP-4B ===
This was the first attempt of the Railways to improve upon the successful WDP-4 locomotive. The Bo1-Bo was found inadequate for hauling 24 coach passenger trains due to the reduced tractive effort. As a result, DLW, reconfigured the chassis to be Co-Co instead. This led to better adhesion with the rails to provide better acceleration with heavy trains. Moreover, the original EMD 710 engine was tweaked to produce an output of 4,500 HP instead of the original 4,000 HP. this Up-rated engine was designated as EMD 16N-710G3B-EC, with an RPM of 910 at Notch-8. One more important change added to this loco was the inclusion of Blended Brake System. This was added to maximise the use of Dynamic brakes by the loco-pilot and therefore minimise the wear and tear on the fixed brake rigging of the coaches and the locomotive. The addition of blended brake is responsible for the subclass to be designated with a 'B'. Some more features are the widening of the cab profile to aid visibility, change in the Traction Motor blower by installing a higher power motor and increase in the axle load to {{Convert|20.2|t|LT ST|abbr=}}. The locomotive also has a self load test feature that allows it to test the net output of the engine. In Siemens and EMD systems, the loco has been provided with 2 traction inverters (TCC-1 and TCC-2, for the respective bogies) while in the Medha system, it has 6 traction inverters, one for each traction motor.<ref>{{Cite book|url=https://rdso.indianrailways.gov.in/works/uploads/File/WDP4B%20(MP-MISC-293-OCT-2014).pdf|title=RDSO diagram book for WDP-4B|publisher=Railway Design and Standards Organisation|year=2014|pages=5}}</ref>
This was the first attempt of the Railways to improve upon the successful WDP-4 locomotive. The Bo1-1Bo was found inadequate for hauling 24 coach passenger trains due to the reduced tractive effort. As a result, DLW, reconfigured the chassis to be Co-Co instead. This led to better adhesion with the rails to provide better acceleration with heavy trains. Moreover, the original EMD 710 engine was tweaked to produce an output of 4,500 HP instead of the original 4,000 HP. this Up-rated engine was designated as EMD 16N-710G3B-EC, with an RPM of 910 at Notch-8. This locomotive came to be known as the "GT46PACe". One more important change added to this loco was the inclusion of Blended Brake System. This was added to maximise the use of Dynamic brakes by the loco-pilot and therefore minimise the wear and tear on the fixed brake rigging of the coaches and the locomotive. The addition of blended brake is responsible for the subclass to be designated with a 'B'. Some more features are the widened ''piggy-face'' cab profile to aid visibility, change in the Traction Motor blower by installing a higher power motor and increase in the axle load to {{Convert|20.2|t|LT ST|abbr=}}. The locomotive also has a self-load test feature that allows it to test the net output of the engine. In Siemens and EMD systems, the loco has been provided with 2 traction inverters (TCC-1 and TCC-2, for the respective bogies) while in the Medha system, it has 6 traction inverters, one for each traction motor.<ref>{{Cite book|url=https://rdso.indianrailways.gov.in/works/uploads/File/WDP4B%20(MP-MISC-293-OCT-2014).pdf|title=RDSO diagram book for WDP-4B|publisher=Railway Design and Standards Organisation|year=2014|pages=5}}</ref>


=== WDP-4D ===
=== WDP-4D ===
The final alterations to the GT46PAC came in the form of the WDP-4D. The locomotive is the most distinctively identifiable of the three thanks to the addition of a second cab at the long hood end of the locomotive. Due to the heat generated from the radiator at the second cab end of the locomotive, DLW had to install air conditioning to protect both the electrical components and the loco-pilot from the high temperatures. The existing features from WDP-4B have been carried forward to this class and it exclusively features the widened cab profile. The loco features a completely different desk control stand, provided by Medha with digital display screens allowing for remote fault diagnostics. Many locos also have GSM-R based transmission antennae to transmit critical loco info for use by maintenance and signalling staff. It features electro-pneumatic microprocessor based control adapted from the WDP-4B and brake system equipment of KNORR/NYAB CCB type. This loco again with Dual-Cab, but with More Power and Better Fuel Consumption compared to ALCo DL560C, along with an Air Conditioned Hood Cab, became a very efficient replacement of [[WDP-3A]]<ref>{{Cite book|url=https://rdso.indianrailways.gov.in/works/uploads/File/WDP4D%20(MP-Misc-316)%20(Rev-00)%20SEPT-2016%20(WDP4D%204500%20HP).pdf|title=WDP4D diagram book|publisher=Railway Design and Standards Organisation|year=2016|pages=12}}</ref>
The final alterations to the GT46PAC came in the form of the WDP-4D. The locomotive is the most distinctively identifiable of the three thanks to the addition of a second cab at the long hood end of the locomotive. Due to the heat generated from the radiator at the second cab end of the locomotive, DLW had to install air conditioning to protect both the electrical components and the loco-pilot from the high temperatures.
 
The existing features from WDP-4B have been carried forward to this class and it exclusively features the widened cab profile. Since it is a Dual Cab now, it is called as "JT46PACe". The loco features a completely different desk control stand, provided by Medha with digital display screens allowing for remote fault diagnostics.
 
Many locos also have GSM-R based transmission antennae to transmit critical loco info for use by maintenance and signalling staff. It features electro-pneumatic microprocessor based control adapted from the WDP-4B and brake system equipment of KNORR/NYAB CCB type.
 
This loco again with Dual-Cab, but with More Power and Better Fuel Consumption and State-of-the-Art features compared to ALCo DL560C, along with an Air Conditioned Hood Cab, became a very efficient replacement of [[WDP-3A]] ([[ALCO DL560C]]) alias "Toaster".<ref>{{Cite book|url=https://rdso.indianrailways.gov.in/works/uploads/File/WDP4D%20(MP-Misc-316)%20(Rev-00)%20SEPT-2016%20(WDP4D%204500%20HP).pdf|title=WDP4D diagram book|publisher=Railway Design and Standards Organisation|year=2016|pages=12}}</ref>


==Builders==
==Builders==
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== Locomotive sheds ==
== Locomotive sheds ==
{| class="wikitable sortable"
{| class="wikitable"
!Zone
|+
!Name
! rowspan="2" style="background:Orange;"|Zone
!Shed Code
! rowspan="2" style="background:Orange;"|Name
!Quantity
! rowspan="2" style="background:Orange;"|Shed Code
! colspan="3" style="background:Orange;"|Quantity
|-
! style="background:Orange;"|WDP-4/4B/4D
|-
|-
| rowspan="2" |[[Central Railway zone|Central Railway]]
| rowspan="2" |[[Central Railway zone|Central Railway]]
|Pune  
|[[Pune Junction railway station|Pune]]
|PA
|PADX
|36
|26
|-
|-
|[[Kalyan railway station|Kalyan]]
|[[Kalyan Junction railway station|Kalyan]]
|KYN
|KYDX
|14
|12
|-
|-
| rowspan="2" |[[Eastern Railway zone|Eastern Railway]]
|[[Eastern Railway zone|Eastern Railway]]
|[[Howrah railway station|Howrah]]
|[[Howrah railway station|Howrah]]
|HWH
|HWHD
|16
|18
|-
|[[Andal railway station|Andal]]
|UDL
|2
|-
|-
| rowspan="3" |[[Northern Railway zone|Northern Railway]]
| rowspan="3" |[[Northern Railway zone|Northern Railway]]
|[[Tughlakabad railway station|Tughlakabad]]  
|[[Diesel Loco Shed, Ludhiana|Ludhiana]]
|TKD
|LDHD
|38
|77
|-
|-
|[[Ludhiana Junction railway station|Ludhiana]]
|[[Lucknow Charbagh railway station|Lucknow]]
|LDH
| AMVD
|32
|28
|-
|-
|[[Lucknow Charbagh railway station|Lucknow]]
|[[Tughlakabad railway station|Tughlakabad]]  
|LKO
|TKDD
|14
|59
|-
|-
|[[North Central Railway zone|North Central Railway]]
|[[North Central Railway zone|North Central Railway]]
|[[Jhansi Junction railway station|Jhansi]]  
|[[Jhansi Junction railway station|Jhansi]]  
|JHS
|JHSD
|14
|8
|-
|-
|[[North Eastern Railway zone|North Eastern Railway]]
|[[North Eastern Railway zone|North Eastern Railway]]
|[[Izzatnagar railway station|Izzatnagar]]
|[[Izzatnagar railway station|Izzatnagar]]
|IZN
|IZND
|35
|11
|-
|-
| rowspan="2" |[[Northeast Frontier Railway zone|Northeast Frontier Railway]]
| rowspan="2" |[[Northeast Frontier Railway zone|Northeast Frontier Railway]]
|[[Guwahati railway station|Guwahati]]
|[[Guwahati railway station|Guwahati]]
|NGC
|NGCD
|27
|72
|-
|-
|[[Siliguri Junction railway station|Siliguri]]  
|[[Siliguri Junction railway station|Siliguri]]  
|SGUJ
|SGUD
|81
|63
|-
|-
|[[North Western Railway zone|North Western Railway]]
|[[North Western Railway zone|North Western Railway]]
|[[Bhagat Ki Kothi railway station|Bhagat Ki Kothi]]
|[[Bhagat Ki Kothi railway station|Bhagat Ki Kothi]]
| BGKT
| BGKD
|81
| 93
|-
|-
| rowspan="2" |[[Southern Railway zone|Southern Railway]]
| rowspan="1" |[[Southern Railway zone|Southern Railway]]
|[[Diesel Loco Shed, Ernakulam|Ernakulam]]
|[[Diesel Loco Shed, Golden Rock|Ponmalai Goldenrock]]
|ERS
|GOCD
|15
|48
|-
|-
|[[Diesel Loco Shed, Golden Rock|Golden Rock]]
| rowspan="3" |[[South Central Railway zone|South Central Railway]]
|GOC
|[[Diesel Loco Shed, Gooty|Gooty]]  
|40
|GYD
|18
|-
|-
|[[South Central Railway zone|South Central Railway]]
|[[Moula Ali railway station|Moula Ali]]
|[[Diesel Loco Shed, Gooty|Gooty]]  
|MLYD
|GY
|12
|40
|-
|[[Kazipet railway station|Kazipet]] || KZJD
|5
|-
|-
| rowspan="2" |[[South Western Railway zone|South Western Railway]]
| rowspan="2" |[[South Western Railway zone|South Western Railway]]
|[[Diesel Loco Shed, Krishnarajapuram|Krishnarajapuram]]
|[[Diesel Loco Shed, Krishnarajapuram|Krishnarajapuram]]
|KJM
|KJMD
|111
|103
|-
|-
|[[Hubli railway station|Hubli]]  
|[[Hubli railway station|Hubballi]]  
|UBL
|UBLD
|48
|31
|-
|-
|[[Western Railway zone|Western Railway]]
|[[Western Railway zone|Western Railway]]
|[[Diesel Loco Shed, Sabarmati|Sabarmati]]  
|[[Diesel Loco Shed, Sabarmati|Sabarmati]]  
|SBT
|SBTD
|46
|22
|-
| rowspan="1" |[[West Central Railway zone|West Central Railway]] || [[Diesel Loco Shed, Itarsi|Itarsi]] || ETD
| 4
|-
|-
| colspan="3" |'''Total Locomotives Active as of 01-12-2021'''<ref>{{Cite web|title=Railway Website Mechanical Department|url=http://www.indianrailways.gov.in/railwayboard/view_section.jsp?lang=0&id=0,1,304,366,541,710,717|access-date=16 May 2020}}</ref>
| colspan="3" |'''Total Locomotives Active as of March 2026'''<ref>{{Cite web|title=Diesel loco availability targets|url=https://elocos.railnet.gov.in/Holding/Dsl_Mar'2026.pdf|access-date=2026-03-04}}</ref>
|710
| colspan="3" |710
|}
|}
<!-- Before updating the information in the loco shed check out the railways current official data first in the Reference then change the data.-->
 
==trains hauled by WDP-4==
this diesel passenger loco pulls 100% passenger trains consists of pulling 90% [[ICF coach]]es and 10% [[LHB coach]]es
{{update section|date=March 2026}}
* [[Poorna Express]] (both ICF and LHB rakes)
* [[Rajdhani Express]] (LHB rake)
* [[Shatabdi Express]] (Both ICF and LHB rakes)
** [[Chennai Central–Mysuru Shatabdi Express|Mysuru to MGR Chennai Central and Fro 12008/07]] (between [[Mysuru Junction]] and [[KSR Bengaluru]] stations) - both ICF and LHB rakes, 2003–2018
** [[Howrah–New Jalpaiguri Shatabdi Express|Howrah to New Jalpaiguri and Fro 12041/42]] (End to End) - only LHB rake, 2012–2020
* [[Humsafar Express]] (LHB rake)
* [[Duronto Express]] (LHB rake)
* [[AC Express (Indian Railways)|AC Express]] (LHB rake)
* [[Yesvantpur-Barmer AC Express]] (ICF Rajdhani rake)
* [[Yesvantpur-Hassan Intercity Express]] (both ICF and LHB rakes)
* [[Kanchanjunga Express]] (both ICF and LHB rakes)
* [[Manwar Sangam Express]] (ICF rake)
* [[Vishwamanava Express]] (ICF rake)
* [[Karnataka Express]] (ICF rake)
* [[Yesvantpur-Harihar Intercity Express]] (LHB rake)
* [[Wainganga Express]] (both ICF and LHB rakes)
* [[Udyan Express]] (both ICF and LHB rakes)
* [[Marusagar Express]] (ICF rake)
* [[Hampi Express]] (ICF rake)
* [[Gol Gumbaz Express]] (ICF rake)
* [[Konkan Kanya Express]] (ICF rake)
* [[Tippu Express]] (ICF rake)
* [[Konark Express]] (ICF rake)
* [[Kaziranga Express]] (ICF rake)
* [[Chalukya Express]] (ICF rake)
* [[Garib Rath Express]] (ICF rake)
* [[Double Decker Express]] (LHB rake)
* [[Jan Shatabdi Express]] (both ICF and LHB rakes)
* [[Mahamana Express]] (ICF rake)
* [[Tejas Express]] (LHB rake)


==WDAP-5 Dual Mode Locomotive==
==WDAP-5 Dual Mode Locomotive==
{{Main|Indian locomotive class WDAP-5}}Indian Railway was planning for a dual mode locomotive from 2015. In 2019 Banaras Locomotive Works Varanasi, RDSO and CLW together have got the successes of producing a new class of dual mode locomotive named WDAP-5 which can run on both diesel and electric. The design of the locomotive is based on WDP-4D and the bogies were taken from WDG-5. It has been designed for a speed capable of 135kmph. It will produce 4500Hp in diesel mode and 5500Hp in electric mode. Fuel tank capacity 3000 liters which is half than WDP-4 due to weight saving. Only 1 unit has been produced till now and it is in trial with RDSO.
{{Main|Indian locomotive class WDAP-5}}Indian Railway was planning for a dual mode locomotive from 2015. In 2019 Banaras Locomotive Works Varanasi, RDSO and CLW together have got the successes of producing a new class of dual mode locomotive named WDAP-5 which can run on both diesel and electric. The design of the locomotive is based on [[WDP-4D]] and the bogies were taken from [[WDG-5]]. It has been designed for a speed capable of 135kmph. It will produce 4500Hp in diesel mode and 5500Hp in electric mode. The fuel tank capacity is 3000 liters which is half of the WDP-4's due to weight saving. Only 1 unit has been produced until now{{When|date=September 2024}} and it is in trial with RDSO. It will pull all passenger trains equipped with LHB coaches just like WAP-7 in yet later after a speed trials{{As of?|date=September 2024}}
 
== Gallery ==
<gallery widths="150" heights="150" class="center">
File:Palnadu Express at James Street 01.jpg|WDP4 No. 20032
File:WDP4 20014 (SGUJ) NFR at NGC yard 2.jpg|WDP4 No. 20014
File:WDP4 20094.jpg|WDP4 No. 20094
File:EMD GT46PAC - Indian Railways.jpg|WDP4 No. 20006
File:WDP4B 40042 at Jabalpur.jpg|WDP4B No. 40042
File:The WDP-4B class Locomotive of Indian Railways.jpg|WDP4B No. 40068
File:WDP-4B -20047.JPG|WDP4 No. 20047
File:The Indian Railways’ production unit, Diesel Locomotive Works, Varanasi, produces world’s first ever 5500 HP Diesel Locomotive.jpg|WDP4D No. 40122
File:CAB-1 front view - Flickr - Dr. Santulan Mahanta.jpg|WDP4D No. 40086
</gallery>


==See also==
==See also==
Line 187: Line 240:
==External links==
==External links==
{{commons category|EMD GT46PAC locomotives}}
{{commons category|EMD GT46PAC locomotives}}
*[http://www.emdiesels.com/emdweb/international/gt46pac.jsp EMD specification]
*[http://www.emdiesels.com/emdweb/international/gt46pac.jsp EMD specification] {{Webarchive|url=https://web.archive.org/web/20110927140646/http://www.emdiesels.com/emdweb/international/gt46pac.jsp |date=2011-09-27 }}
*[http://www.emdiesels.com/emdweb/international/indianews/autocarWDG4091009.pdf Autocar India has a detailed profile of the WDG-4 locomotive.]
*[http://www.emdiesels.com/emdweb/international/indianews/autocarWDG4091009.pdf Autocar India has a detailed profile of the WDG-4 locomotive.]
*[http://www.irfca.org/faq/faq-loco2d.html#loco Diesel loco specification at IRFCA website]
*[http://www.irfca.org/faq/faq-loco2d.html#loco Diesel loco specification at IRFCA website]
Line 197: Line 250:
{{EMD misc}}
{{EMD misc}}


{{DEFAULTSORT:WDP-4}}
[[Category:A1A-A1A locomotives]]
[[Category:A1A-A1A locomotives]]
[[Category:Electro-Motive Diesel locomotives|GT46PAC]]
[[Category:Electro-Motive Diesel locomotives|GT46PAC]]
[[Category:Diesel-electric locomotives of India|P-4]]
[[Category:Diesel–electric locomotives of India|P-4]]
[[Category:5 ft 6 in gauge locomotives]]
[[Category:5 ft 6 in gauge locomotives]]
[[Category:Electro-Motive Division locomotives|G46TPAC]]
[[Category:Electro-Motive Division locomotives|GT46PAC]]
[[Category:C-C locomotives]]
[[Category:C-C locomotives]]
[[Category:Co-Co locomotives]]
[[Category:Co-Co locomotives]]
[[Category:Railway locomotives introduced in 2000]]
[[Category:Banaras Locomotive Works locomotives]]
[[Category:Passenger locomotives]]

Latest revision as of 08:23, 28 March 2026


WDP-4
KJM based WDP-4D hauling Chamrajnagar - Tumakuru Passenger.
Type and origin
Power typeDiesel–electric
BuilderEMD & BLW
ModelGT46PAC (2000–2007)
GT46PACe (2007–2012)
JT46PACe (2010–2017)
Build date(EMD) 2000–2001
(DLW) 2003–2017
Total producedWDP-4: 100
WDP-4B: 86
WDP-4D: 525
Specifications
Configuration:
​
 • UICBo1'-1Bo', later Co'-Co'
 • CommonwealthBo1-1Bo, later Co-Co
Gauge5 ft 6 in (1,676 mm)
Truckshigh adhesion HTSC (High Tensile Steel Cast)
Wheel diameter1,092 mm (43.0 in)
Axle loadWDP-4 : 19.5 t (19.2 long tons; 21.5 short tons)
WDP4B : 20.2 t (19.9 long tons; 22.3 short tons)
WDP4D : 20.5 t (20.2 long tons; 22.6 short tons)
Loco weightWDP4 : 115.8 t (114.0 long tons; 127.6 short tons)
WDP4B : 117 t (115 long tons; 129 short tons)
WDP4D : 123 t (121 long tons; 136 short tons)
Fuel typeDiesel fuel
Fuel capacity5,000–6,100 L (1,100–1,300 imp gal; 1,300–1,600 US gal)
Prime moverEMD 16-710G3B
RPM range200 - 954 rpm
 • RPM low idle200 rpm
 • RPM idle269 rpm
 • Maximum RPM954 rpm
Engine type2-stroke V16 diesel
Aspirationturbocharged
Displacement186.16 L (11,360 cu in)
AlternatorWDP4 / WDP4B : GM TA-17 (main) with CA-6B (companion)
WDP4D : EMD TA-17 (main) with C6AB (companion) or BHEL TA 9901 (main) with AA 9201 (companion)
Traction motorsWDP4 : Siemens 1TB2622-0TB02
WDP4B : Siemens 1TB2622-0TA02 or EMD A 2916-8
WDP4D : Siemens 1TB2525-0TA02 or EMD A 2916-8
 • Continuous1250 Amps DC
Cylinders16
TransmissionAC Electric
Gear ratio17:77
Loco brakeAir, Handbrake, Blended (not in WDP4), Dynamic brake
Train brakesGraduated Release Twin Pipe Air Brakes (IRAB-1 Compatible)
Performance figures
Maximum speedWDP-4 :
Service : 160 km/h (99 mph)
Testing : 180 km/h (110 mph)

WDP-4B : 130 km/h (81 mph)

WDP-4D : 135 km/h (84 mph)
Power output
  • 4,000 hp (2,980 kW) (WDP4)
  • 4,500 hp (3,360 kW) (WDP4B)
  • 4,500 hp (3,360 kW) (WDP4D)
Tractive effortWDP-4 : 27,550 kgf (270.2 kN)

WDP-4B : 40,775 kgf (399.87 kN)

WDP-4D : 43,788 kgf (429.41 kN)
Career
OperatorsIndian Railways
SNTF(Algeria) - as EMD GT-36 HCW, with just minor modifications in the body design, along with down-rating the power output to 3,600 HP (2.7 MW) using an 16-645 F 3B, as the number GT-"36"
Numbers20000 - 20103, 40001 - 40608
LocaleIndia
Unless specified otherwise, data is obtained from RDSO diagram books, given in references.

The Indian locomotive class WDP-4 (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 Banaras Locomotive Works (BLW) of Varanasi, India for Indian Railways as the classes WDP4, WDP4B and WDP4D.[1] The GT46PAC is a passenger version of the previous Indian Railways EMD GT46MAC (WDG-4) freight locomotive. The locomotive has a 16-cylinder 710G3B diesel engine and is one of the fastest diesel–electric locomotives in service in Indian Railways.[2]

Variants[edit | edit source]

WDP-4[edit | edit source]

The WDP-4 was the loco originally designed by GM EMD and 10 of them were dispatched to India by June 2001. Later on Banaras Locomotive Works, Varanasi started building them initially using knocked-down kits and later indigenously. Starting 2003, the locomotives were produced in large numbers by BLW. The locomotive features self diagnostics control using EM2000 onboard microprocessor which was a new technology for Indian Railways back then.

Unlike the Co-Co wheel arrangement featured on most locomotives, including its freight hauling variant, WDG-4, this loco has a Bo1-1Bo wheel arrangement meaning that it has two powered and one unpowered axle per bogie. This was done to reduce the weight of the loco to make it suitable for passenger operations and also to reduce maintenance.[3]

Visibility Issue[edit | edit source]

The use of the locomotive with the long hood forward configuration has been criticised with respect to the driver's visibility as it is affected due to the protruding radiator section at the hood-end. This criticism has been rejected by the Railways.[4] However, in response, the cab profile of some WDP-4s were widened with a Piggy-face profile, to increase the field of view from the control cab and the WDP-4B variant was also produced with the same widened cab profile.

WDP-4B[edit | edit source]

This was the first attempt of the Railways to improve upon the successful WDP-4 locomotive. The Bo1-1Bo was found inadequate for hauling 24 coach passenger trains due to the reduced tractive effort. As a result, DLW, reconfigured the chassis to be Co-Co instead. This led to better adhesion with the rails to provide better acceleration with heavy trains. Moreover, the original EMD 710 engine was tweaked to produce an output of 4,500 HP instead of the original 4,000 HP. this Up-rated engine was designated as EMD 16N-710G3B-EC, with an RPM of 910 at Notch-8. This locomotive came to be known as the "GT46PACe". One more important change added to this loco was the inclusion of Blended Brake System. This was added to maximise the use of Dynamic brakes by the loco-pilot and therefore minimise the wear and tear on the fixed brake rigging of the coaches and the locomotive. The addition of blended brake is responsible for the subclass to be designated with a 'B'. Some more features are the widened piggy-face cab profile to aid visibility, change in the Traction Motor blower by installing a higher power motor and increase in the axle load to 20.2 tonnes (19.9 long tons; 22.3 short tons). The locomotive also has a self-load test feature that allows it to test the net output of the engine. In Siemens and EMD systems, the loco has been provided with 2 traction inverters (TCC-1 and TCC-2, for the respective bogies) while in the Medha system, it has 6 traction inverters, one for each traction motor.[5]

WDP-4D[edit | edit source]

The final alterations to the GT46PAC came in the form of the WDP-4D. The locomotive is the most distinctively identifiable of the three thanks to the addition of a second cab at the long hood end of the locomotive. Due to the heat generated from the radiator at the second cab end of the locomotive, DLW had to install air conditioning to protect both the electrical components and the loco-pilot from the high temperatures.

The existing features from WDP-4B have been carried forward to this class and it exclusively features the widened cab profile. Since it is a Dual Cab now, it is called as "JT46PACe". The loco features a completely different desk control stand, provided by Medha with digital display screens allowing for remote fault diagnostics.

Many locos also have GSM-R based transmission antennae to transmit critical loco info for use by maintenance and signalling staff. It features electro-pneumatic microprocessor based control adapted from the WDP-4B and brake system equipment of KNORR/NYAB CCB type.

This loco again with Dual-Cab, but with More Power and Better Fuel Consumption and State-of-the-Art features compared to ALCo DL560C, along with an Air Conditioned Hood Cab, became a very efficient replacement of WDP-3A (ALCO DL560C) alias "Toaster".[6]

Builders[edit | edit source]

The first set of 10 locos starting from road number 20000 to 20009 were manufactured by the Electro Motive Diesel (EMD) of (General Motors) while road numbers 20011 upwards have been manufactured by Banaras Locomotive Works (DLW) of Varanasi in collaboration with GM (General motors). Siemens and Medha are part of this group providing a large number of components of the electronics on board this loco such as the control stand and traction inverters.[7] Additional components are acquired through tenders and a bidding process.

Locomotive sheds[edit | edit source]

Zone Name Shed Code Quantity
WDP-4/4B/4D
Central Railway Pune PADX 26
Kalyan KYDX 12
Eastern Railway Howrah HWHD 18
Northern Railway Ludhiana LDHD 77
Lucknow AMVD 28
Tughlakabad TKDD 59
North Central Railway Jhansi JHSD 8
North Eastern Railway Izzatnagar IZND 11
Northeast Frontier Railway Guwahati NGCD 72
Siliguri SGUD 63
North Western Railway Bhagat Ki Kothi BGKD 93
Southern Railway Ponmalai Goldenrock GOCD 48
South Central Railway Gooty GYD 18
Moula Ali MLYD 12
Kazipet KZJD 5
South Western Railway Krishnarajapuram KJMD 103
Hubballi UBLD 31
Western Railway Sabarmati SBTD 22
West Central Railway Itarsi ETD 4
Total Locomotives Active as of March 2026[8] 710

trains hauled by WDP-4[edit | edit source]

this diesel passenger loco pulls 100% passenger trains consists of pulling 90% ICF coaches and 10% LHB coaches

WDAP-5 Dual Mode Locomotive[edit | edit source]

Main article: Indian locomotive class WDAP-5

Indian Railway was planning for a dual mode locomotive from 2015. In 2019 Banaras Locomotive Works Varanasi, RDSO and CLW together have got the successes of producing a new class of dual mode locomotive named WDAP-5 which can run on both diesel and electric. The design of the locomotive is based on WDP-4D and the bogies were taken from WDG-5. It has been designed for a speed capable of 135kmph. It will produce 4500Hp in diesel mode and 5500Hp in electric mode. The fuel tank capacity is 3000 liters which is half of the WDP-4's due to weight saving. Only 1 unit has been produced until now[when?] and it is in trial with RDSO. It will pull all passenger trains equipped with LHB coaches just like WAP-7 in yet later after a speed trialsTemplate:As of?

Gallery[edit | edit source]

  • WDP4 No. 20032
    WDP4 No. 20032
  • WDP4 No. 20014
    WDP4 No. 20014
  • WDP4 No. 20094
    WDP4 No. 20094
  • WDP4 No. 20006
    WDP4 No. 20006
  • WDP4B No. 40042
    WDP4B No. 40042
  • WDP4B No. 40068
    WDP4B No. 40068
  • WDP4 No. 20047
    WDP4 No. 20047
  • WDP4D No. 40122
    WDP4D No. 40122
  • WDP4D No. 40086
    WDP4D No. 40086

See also[edit | edit source]

References[edit | edit source]

  1. ↑ "Welcome to DLW Official Website". Archived from the original on 2014-12-14. Retrieved 2014-12-09.
  2. ↑ "Details from production Factory".
  3. ↑ Introduction Handbook on GM Locomotive (PDF). IR CAMTECH. 2006.
  4. ↑ "Railway claims engine design not faulty". News18. 2010-06-15. Retrieved 2020-05-15.
  5. ↑ RDSO diagram book for WDP-4B (PDF). Railway Design and Standards Organisation. 2014. p. 5.
  6. ↑ WDP4D diagram book (PDF). Railway Design and Standards Organisation. 2016. p. 12.
  7. ↑ "DLW site".
  8. ↑ "Diesel loco availability targets" (PDF). Retrieved 2026-03-04.

External links[edit | edit source]

Template:EMD misc

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