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{{Short description|Indian Railway passenger class electric locomotive}}
{{Use dmy dates|date=March 2019}}{{Use Indian English|date=May 2019}}
{{Use dmy dates|date=March 2019}}{{Use Indian English|date=May 2019}}
{{Infobox locomotive
{{Infobox locomotive
| name = WAP-7
| name = WAP-7
| image = TPTY JAT Humsafar.jpg
| image = BZA WAP7.jpg
| imagesize =
| caption = Vishakhapatnam based WAP-7 hauling Tirupati-Jammu Tawi Humsafar Express near Kazipet
| caption = Vijayawada based WAP-7 at BZA ELS.
| powertype = [[Electric locomotive|Electric]]
| powertype = [[Electric locomotive|Electric]]
| builder = [[Chittaranjan Locomotive Works]],<br />[[Banaras Locomotive Works]],<br />[[Diesel-Loco Modernisation Works]]
| builder = * [[Chittaranjan Locomotive Works]],<br />
* [[Banaras Locomotive Works]],
* [[Patiala Locomotive Works]]
| builddate = 10 May 2000 - present
| builddate = 1999-2023 (CLW) <br />
2016-present (BLW) <br />
| totalproduction = 1422 as of January 2022
2017-present (PLW) <br />
| totalproduction = 1810 as of December 2024
| gauge = {{Track gauge|5ft6in|lk=on}}
| gauge = {{Track gauge|5ft6in|lk=on}}
| bogies = [[Co-Co locomotives|Co-Co]], Fabricated [[Flexicoil]] Mark IV [[bogie]]s; bogie wheelbase {{convert|1850|mm|in|abbr=on|frac=8}} + {{convert|1850|mm|in|abbr=on|frac=8}}
| bogies = [[Co-Co locomotives|Co-Co]], Fabricated [[Flexicoil]] Mark IV [[bogie]]s; bogie wheelbase {{convert|1850|mm|in|abbr=on|frac=8}} + {{convert|1850|mm|in|abbr=on|frac=8}}
| wheeldiameter = {{convert|1092|mm|in|abbr=on|frac=8}} new, {{convert|1016|mm|in|abbr=on|frac=8}} worn
| wheeldiameter = {{convert|1092|mm|in|abbr=on|frac=8}} new, {{convert|1016|mm|in|abbr=on|frac=8}} worn
| wheelbase = {{convert|15700|mm|ftin|abbr=on|frac=8}}
| wheelbase = {{convert|15700|mm|ftin|abbr=on|frac=8}}
| length =
| over couplers =
| over couplers =
| over bufferbeams = {{convert|20562|mm|ftin|abbr=on|frac=8}}
| over bufferbeams = {{convert|20562|mm|ftin|abbr=on|frac=8}}
| body =
| body =
| width = {{convert|3152|mm|ftin|abbr=on|frac=8}}
| width = {{convert|3152|mm|ftin|abbr=on|frac=8}}
| height =
| height = {{convert|5235|mm|ftin|abbr=on|frac=8}}
| length = {{convert|20.62|m|ftin|abbr=on|frac=8}}
| pantodown = {{convert|4255|mm|ftin|abbr=on|frac=8}}
| pantodown = {{convert|4255|mm|ftin|abbr=on|frac=8}}
| bodyonly = <!-- electrics -->
| bodyonly = <!-- electrics -->
| axleload = '''WAP 7'''<br>
| axleload = '''WAP 7'''<br>
{{convert|20.5|t|abbr=on}}<ref>{{cite web | url=https://irfca.org/faq/faq-loco2e.html | title=&#91;IRFCA&#93; Indian Railways FAQ - AC Electric Locomotives }}</ref>
{{convert|20.5|t|abbr=on}}


'''WAP 7HS'''
'''WAP 7HS'''
{{convert|18.08|t|abbr=on}}<ref>{{cite web | url=https://www.quora.com/What-are-the-specifications-of-WAP-7-HS | title=What are the specifications of WAP 7 HS? }}</ref>
{{convert|18.08|t|abbr=on}}
| locoweight = {{convert|123|t|abbr=on}}
| locoweight = {{convert|123|t|abbr=on}}<ref>{{cite web | url=https://irfca.org/faq/faq-loco2e.html | title=&#91;IRFCA&#93; Indian Railways FAQ - AC Electric Locomotives }}</ref>
| powersupply = 3-phase 2180 V 50 Hz
| powersupply = 3-phase 2180 V 50 Hz
| electricsystem = [[25 kV 50 Hz|25 kV 50 Hz AC]] [[Overhead line|Overhead]]
| electricsystem = [[25 kV 50 Hz|25 kV 50 Hz AC]] [[Overhead line|Overhead]]
Line 34: Line 40:
| locobrakes = [[railway air brake|Air]] and [[regenerative brake|regenerative]]
| locobrakes = [[railway air brake|Air]] and [[regenerative brake|regenerative]]
| trainbrakes = [[Railway air brake|Air]]
| trainbrakes = [[Railway air brake|Air]]
| maxspeed = {{convert|180|km/h|mph|abbr=on}}
| maxspeed = {{convert|140|km/h|mph|abbr=on}} <small>(WAP-7)</small><br>
{{convert|160|km/h|mph|abbr=on}} <small>(WAP-7HS)</small>
<br/>Potential speed: {{convert|180|km/h|mph|abbr=on}}
<small>(WAP-7HS)</small>
{{convert|155|km/h|mph|abbr=on}} <small>(WAP-7)</small><br>
| poweroutput = Max Power : {{convert|6350|HP|kW|abbr=on}}
| poweroutput = Max Power : {{convert|6350|HP|kW|abbr=on}}
<br/>Continuous : {{convert|6120|HP|kW|abbr=on}}
<br/>Continuous: {{convert|6120|HP|kW|2|abbr=on}}
| tractiveeffort = Starting : {{convert|322.4|kN|lbf|abbr=on}}
| tractiveeffort = Starting : {{convert|322.4|kN|lbf|abbr=on}}
<br />Continuous : {{convert|228|kN|lbf|abbr=on}} at 71 km/h
<br />Continuous : {{convert|228|kN|lbf|abbr=on}} at 71 km/h
| operator = [[Indian Railways]]
| operator = [[Indian Railways]]
| fleetnumbers = '''30201+''' [[Chittaranjan Locomotive Works|CLW]]
| fleetnumbers = * '''30201-30829''' [[Chittaranjan Locomotive Works|CLW]]
'''37001+''' [[Banaras Locomotive Works|BLW]]
* '''37001+''' [[Banaras Locomotive Works|BLW]]
'''39000+''' [[Diesel-Loco Modernisation Works|DLMW]]
* '''39000+''' [[Patiala Locomotive Works|PLW]]
| firstrundate = 19 May 2000
| firstrundate = 19 May 2000
| nicknames =
| nicknames =
| locale = [[India]]
| locale = All over [[India]]
}}
}}


The '''Indian locomotive class WAP-7''' is a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[Electric locomotive|electric locomotives]] that was developed in 1999 by [[Chittaranjan Locomotive Works]] (CLW) for [[Indian Railways]]. The model name stands for [[5 ft 6 in gauge railway|broad gauge (W)]], AC Current (A), Passenger traffic (P) engine, 7th generation (7). They entered service in 2000. A total of 1422 WAP-7 have been built, with more units being built at CLW, [[Banaras Locomotive Works]] (BLW) and [[Diesel-Loco Modernisation Works]] (DLMW).
The '''Indian locomotive class WAP-7''' is a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[electric locomotive]]s that was developed in 1999 by [[Chittaranjan Locomotive Works]] (CLW) for [[Indian Railways]]. The model name stands for [[5 ft 6 in gauge railway|broad gauge (W)]], AC Current (A), Passenger traffic (P) locomotive, 7th generation (7). They entered service in 2000. A total of 1683 WAP-7 have been built, with more units being built at CLW, [[Banaras Locomotive Works]] (BLW) and [[Diesel-Loco Modernisation Works|Patiala Locomotive Works]] (PLW).


The WAP-7 is one of the most successful locomotives of Indian Railways serving passenger trains for over 21 years. It is a passenger variant of the [[Indian locomotive class WAG-9|WAG-9]] freight locomotive with a modified [[gear ratio]] to pull lighter loads at higher speeds. With an output of {{convert|6350|HP|kW|abbr=on}}, it is the most powerful passenger locomotive in the [[Indian Railways]] fleet, and the most numerous passenger locomotive in India, with a total 1422 locomotives built as of January 2022. The WAP-7 is capable of hauling 24 coach trains at speeds {{convert|110|-|140|km/h|abbr=on}}.
The WAP-7 is the most successful locomotives of Indian Railways{{Peacock inline|date=August 2024}} serving passenger trains since its introduction in 1999. It is a passenger variant of the [[Indian locomotive class WAG-9|WAG-9]] freight locomotive with a modified [[gear ratio]] to pull lighter loads at higher speeds. With an output of 6,125 hp, it is the most powerful passenger locomotive in the [[Indian Railways]] fleet, and the most numerous passenger locomotive in India.{{Peacock inline|date=August 2024}} The WAP-7 is capable of hauling 24 coach trains at speeds {{convert|110|-|140|km/h|abbr=on}}.


== History ==
== History ==
{{More citations needed|section|date=August 2024}}
It is now largely used by [[Northern Railway zone|Northern Railways]] (NR), [[South Central Railway zone|South Central Railways]] (SCR), [[Central Railways]] (CR), [[South East Central Railway Zone|South East Central Railways]] (SECR), [[South Eastern Railway (India)|South Eastern Railways]] (SER), [[West Central Railway zone|West Central Railways]] (WCR), [[Eastern Railway zone|Eastern Railways]] (ER), [[Western Railway zone|Western Railways]] (WR), [[North Central Railway zone|North Central Railways]] (NCR), [[South Western Railway zone|South Western Railways]] (SWR), [[Southern Railway Zone|Southern Railways]] (SR), [[East Central Railway zone|East Central Railways]] (ECR), [[East Coast Railway zone|East Coast Railways]] (ECoR), [[North Eastern Railway zone|North Eastern Railways]] (NER) etc among other zones. As of October 2021, all of which are fitted with H-type transition couplers which are compatible with both [[screw coupling]] and centre-buffer coupling. In February 2017, [[Banaras Locomotive Works]] built their first WAP 7 class locomotive.<ref name="prod_dlw">{{cite web|title=Brief History of DLW|url=http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,294,702|publisher=Ministry of Railways, Government of India|access-date=30 December 2017}}</ref>
It is now{{When|date=August 2024}} largely used by [[Northern Railway zone|Northern Railways]] (NR), [[South Central Railway zone|South Central Railways]] (SCR), [[Central Railways]] (CR), [[South East Central Railway Zone|South East Central Railways]] (SECR), [[South Eastern Railway (India)|South Eastern Railways]] (SER), [[West Central Railway zone|West Central Railways]] (WCR), [[Eastern Railway zone|Eastern Railways]] (ER), [[Western Railway zone|Western Railways]] (WR), [[North Central Railway zone|North Central Railways]] (NCR), [[South Western Railway zone|South Western Railways]] (SWR), [[Southern Railway Zone|Southern Railways]] (SR), [[East Central Railway zone|East Central Railways]] (ECR), [[East Coast Railway zone|East Coast Railways]] (ECoR), [[North Eastern Railway zone|North Eastern Railways]] (NER), [[North Western Railway zone|North Western Railways]] (NWR), [[Northeast Frontier Railway zone|Northeast Frontier Railways]] (NFR)
among other zones. As of October 2021, all of these are fitted with H-type transition couplers which are compatible with both [[screw coupling]] and centre-buffer coupling. In February 2017, [[Banaras Locomotive Works]] built their first WAP 7 class locomotive.<ref name="prod_dlw">{{cite web|title=Brief History of DLW|url=http://www.dlw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,294,702|publisher=Ministry of Railways, Government of India|access-date=30 December 2017}}</ref>


In 2019, a variant of the WAP-7, designated the WAP-7HS, was introduced for higher speeds. The WAP-7HS has a max speed of {{convert|180|km/h|mph|abbr=on}}, and is capable of hauling a 24-car train at {{convert|160|km/h|mph|abbr=on}} as opposed to the {{convert|140|km/h|mph|abbr=on}} of the original. Indian Railways plans to use the WAP-7HS for Shatabdi, Rajdhani, and Duronto express trains. However, as of November 2021, it has not been confirmed if any others have been built, and the single completed WAP-7HS has stayed restricted to {{convert|130|km/h|mph|abbr=on}}.
In 2019, a variant of the WAP-7, designated the WAP-7HS, was introduced for higher speeds. The WAP-7HS has a max speed of {{convert|180|km/h|mph|abbr=on}}, and is capable of hauling a 24-car train at {{convert|160|km/h|mph|abbr=on}} as opposed to the {{convert|140|km/h|mph|abbr=on}} of the original. Indian Railways plans to use the WAP-7HS for Shatabdi, Rajdhani, and Duronto express trains. However, as of September 2022, it has not been confirmed if any others have been built, and the single completed WAP-7HS has stayed restricted to {{convert|130|km/h|mph|abbr=on}}.


==Head-on Generation (HOG)==
==Head-on Generation (HOG)==
[[File:HWH HOG WAP7.jpg|thumb|Howrah based "HOG" equipped WAP-7]]
[[File:Indian Electric Locomotive WAP-7 ED - 39231.jpg|thumb|The HOG ports are equipped on right side upper and left side down on Erode based WAP-7 at White Field railway station]]
A main feature of some locomotives of this class is that they eliminate the need to have separate End on Generation (EOG) sets or DG (Diesel Generator) sets for supplying power to the train resulting in significant savings on maintenance and running costs. This technology, called HOG or "Head On Generation", transfers electric power from the loco's [[Pantograph (transport)|pantograph]] to the coaches instead of EOG where a power car equipped with diesel generator capable of generating adequate power of 3-phase 50&nbsp;Hz 415 V / 750 V AC (called '[[head-end power]]') is provided at either end of the train rake to supply power.<ref>{{cite web |url=http://www.indianexpress.com/news/train-had-wap7-engine-black-box-may-reveal-cause/816265/0 |title=Train had WAP-7 engine, ‘black box’ may reveal cause|publisher=[[Zee News]]|date=9 Aug 2010|access-date=25 Aug 2012}}</ref><ref>{{cite web|url=http://www.clw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,296,306,470|title=Recent Developments |publisher=[[Chittaranjan Loco works]] |access-date=25 Aug 2012}}</ref><ref name="rdso">{{cite web |url=http://www.rdso.indianrailways.gov.in/works/uploads/File/Electrical(1).pdf |title=Development of Electric locomotive with Head On Generation (HOG) facility |publisher=Indian Railways}}</ref>


A main feature of Majority locomotives of this class is that they eliminate the need to have separate End on Generation (EOG) sets or DG (Diesel Generator) sets for supplying power to the train resulting in significant savings on maintenance and running costs. This technology, called HOG or "Head On Generation", transfers electric power from the loco's [[Pantograph (transport)|pantograph]] to the coaches instead of EOG where a power car equipped with diesel generator capable of generating adequate power of 3-phase 50&nbsp;Hz 415 V / 750 V AC (called '[[head-end power]]') is provided at either end of the train rake to supply power.<ref>{{cite web |url=http://www.indianexpress.com/news/train-had-wap7-engine-black-box-may-reveal-cause/816265/0 |title=Train had WAP-7 engine, 'black box' may reveal cause|publisher=[[Zee News]]|date=9 Aug 2010|access-date=25 Aug 2012}}</ref><ref>{{cite web|url=http://www.clw.indianrailways.gov.in/view_section.jsp?lang=0&id=0,296,306,470|title=Recent Developments |publisher=[[Chittaranjan Locomotive Works]] |access-date=25 Aug 2012}}</ref><ref name="rdso">{{cite web |url=http://www.rdso.indianrailways.gov.in/works/uploads/File/Electrical(1).pdf |title=Development of Electric locomotive with Head On Generation (HOG) facility |publisher=Indian Railways}}</ref>
==Locomotive sheds==


==Locomotive sheds==
{| class="wikitable sortable"
{| class="wikitable"
|+
! rowspan="2" style="background: skyblue;" |Zone
! rowspan="2" style="background: skyblue;" |Name
! rowspan="2" style="background: skyblue;" |Shed Code
! colspan="2" style="background: skyblue;" |Quantity
! rowspan="2" style="background: skyblue;" |Introduction Year
|-
|-
! style="background:#87CEEB |Zone
! style="background:skyblue;" |HOG
! style="background:#87CEEB | Name
! style="background: skyblue;" |Non HOG
! style="background:#87CEEB | Shed Code
! style="background:#87CEEB |Quantity
! style="background:#87CEEB | Introduction
|-
|-
| rowspan="2" |[[Central Railway zone|Central Railway]] || [[Electric Loco Shed, Ajni|Ajni]] ||AQ
| rowspan="3" |[[Central Railway zone|Central Railway]] || [[Electric Loco Shed, Ajni|Ajni]] ||AQE
|65
|65|| 27 December 2010
|4
|2010
|-
|-
|[[Electric Loco Shed, Kalyan|Kalyan]]
|[[Electric Loco Shed, Kalyan|Kalyan]]
|KYNE
|KYN
|71
|70
|4
|21 June 2019
|2019
|-
|-
|[[Pune railway station|Pune]]
|rowspan="2" |[[Eastern Railway zone|Eastern Railway]] || [[Electric Loco Shed, Howrah|Howrah]] ||HWH
|PADX
|89|| 20 February 2012
|46
|
|2023
|-
|-
| rowspan="2" |[[Eastern Railway zone|Eastern Railway]] || [[Electric Loco Shed, Howrah|Howrah]] ||HWHE
| [[Sealdah railway station|Sealdah]]|| SDAH ||30||01 April 2020
|89
|
|2012
|-
|-
| [[Sealdah railway station|Sealdah]]|| SDAD ||21
|rowspan="2" |[[East Central Railway zone|East Central Railway]] || [[Electric Loco Shed, Gomoh|Gomoh]] ||GMO
|9
|57|| 19 May 2000
|2020
|-
|-
| rowspan="3" |[[East Central Railway zone|East Central Railway]] || [[Electric Loco Shed, Gomoh|Gomoh]] ||GMOE
|[[Barauni Junction railway station|Barauni]] || BJU || 20 || 21 September 2021
|46
|
|2000
|-
|-
|[[Barauni Junction railway station|Barauni]]|| BJUE || 6
| [[East Coast Railway zone|East Coast Railway]]|| [[Electric Loco Shed, Visakhapatnam|Visakhapatnam]] ||VSKP
|
|49|| 22 November 2016
|2021
|-
|-
|[[Diesel Loco Shed, Samastipur|Samastipur]]||SPJD
| rowspan="2" |[[Northern Railway zone|Northern Railway]] || [[Electric Loco Shed, Ghaziabad|Ghaziabad]] ||GZB
|51
|164|| 19 May 2000
|
|2022
|-
| [[East Coast Railway zone|East Coast Railway]]|| [[Electric Loco Shed, Visakhapatnam|Visakhapatnam]] ||WATE
|82
|
|2016
|-
| rowspan="2" |[[Northern Railway zone|Northern Railway]] || [[Electric Loco Shed, Ghaziabad|Ghaziabad]] ||GZBE
|114
|27
|2000
|-
|-
|[[Electric Loco Shed, Ludhiana|Ludhiana]] || LDHE ||44
|[[Tughlakabad railway station|Tughlakabad]] || TKD(D) || 42 || 15 April 2021
|
|2022
|-
|-
|[[North Central Railway zone|North Central Railway]]
|[[North Central Railway zone|North Central Railway]]
|[[Electric Loco Shed, Kanpur|Kanpur]]
|[[Electric Loco Shed, Kanpur|Kanpur]]
|CNBE
|CNB
|76
|87
|
|31 March 2019
|2019
|-
|-
|[[North Eastern Railway zone|North Eastern Railway]]
| rowspan="3" |[[North Eastern Railway zone|North Eastern Railway]]
|[[Gonda Junction railway station|Gonda]]
|[[Gonda Junction railway station|Gonda]]
|GDDX
|GD(D)
|17
|17
|
|27 February 2021
|2021
|-
|-
||[[Gorakhpur Junction railway station|Gorakhpur]]
| rowspan="2" |[[Southern Railway zone|Southern Railway]] || [[ Electric Loco Shed, Erode|Erode]] ||ED
|GKPL
|65|| 19 October 2017
|13
|
|2024
|-
|-
||[[Izzatnagar railway station|Izzatnagar]]
|| [[Electric Loco Shed, Royapuram|Royapuram]] ||RPM
|IZN
|103|| 21 January 2011
|1
|
|2024
|-
|-
| rowspan="2" |[[South Central Railway zone|South Central Railway]] || [[Electric Loco Shed, Lallaguda|Lallaguda]] || LGD
|[[Northeast Frontier Railway zone|Northeast Frontier Railway]]
|[[Diesel Loco Shed, Siliguri|Siliguri]]
||130|| 26 December 2008
|SGUD
|15
|
|2024
|-
|[[North Western Railway zone|North Western Railway]]
|[[Diesel Loco Shed, Bhagat Ki Kothi|Bhagat Ki Kothi]]
|BGKD
|44
|
|2023
|-
| rowspan="2" |[[Southern Railway zone|Southern Railway]] || [[Electric Loco Shed, Erode|Erode]] ||EDE
|76
|
|2017
|-
|| [[Electric Loco Shed, Royapuram|Royapuram]] ||RPME
|111
|5
|2011
|-
| rowspan="2" |[[South Central Railway zone|South Central Railway]] || [[Electric Loco Shed, Lallaguda|Lallaguda]] || LGDE
|135
|16
|2008
|-
|-
| [[Electric Loco Shed, Vijayawada|Vijayawada]]
| [[Electric Loco Shed, Vijayawada|Vijayawada]]
| BZA
| BZAE
| 18
| 71
|
| 27 March 2021
|2021
|-
|-
| rowspan="3" |[[South Eastern Railway zone|South Eastern Railway]]
| rowspan="3" |[[South Eastern Railway zone|South Eastern Railway]]
| [[Electric Loco Shed, Tatanagar|Tatanagar]]||TATA
| [[Electric Loco Shed, Tatanagar|Tatanagar]]||TATE
|63
|27|| 18 April 2017
|
|2017
|-
|-
|[[Bondamunda railway station|Bondamunda]]
|[[Bondamunda railway station|Bondamunda]]
|BNDL
|BNDM
|15
|16
|
|31 August 2018
|2018
|-
|-
|[[Santragachi Junction railway station|Santragachi]]
|[[Santragachi Junction railway station|Santragachi]]
|SRCE
|SRC
|54
|22
|
|9 November 2017
|2017
|-
|-
| [[South East Central Railway zone|South East Central Railway]] || [[Electric Loco Shed, Bhilai|Bhilai]] ||BIA
| [[South East Central Railway zone|South East Central Railway]] || [[Electric Loco Shed, Bhilai|Bhilai]] ||BIAE
|13
|51|| 6 September 2012
|
|2012
|-
|-
| [[South Western Railway zone|South Western Railway]] || [[Diesel Loco Shed, Krishnarajapuram|Krishnarajapuram]]||KJM(D)
| rowspan="2" | [[South Western Railway zone|South Western Railway]] || [[Diesel Loco Shed, Krishnarajapuram|Krishnarajapuram]]||KJMD
|70
|23|| 31 Aug 2019
|
|2019
|-
|-
| [[Hubballi Junction railway station|Hubli]]
| [[Western Railway zone|Western Railway]] || [[Electric Loco Shed, Vadodara|Vadodara]] ||BRC
|| UBLD
|138|| 23 April 2016
| 12
|
|2024
|-
|-
| rowspan="2" |[[West Central Railway zone|West Central Railway]] || [[Electric Loco Shed, Tuglakabad|Tughlakabad]] ||TKD
| rowspan="2"| [[Western Railway zone|Western Railway]] || [[Electric Loco Shed, Vadodara|Vadodara]] ||BRCE
|127
|95|| 25 January 2013
|
|2016
|-
|-
| [[Electric Loco Shed, Itarsi|Itarsi]]||ET
|[[Electric Loco Shed, Valsad|Valsad]]
|BLEE
|23|| 1 December 2018
|45
|
|2024
|-
|-
| rowspan="2" |[[West Central Railway zone|West Central Railway]] || [[Electric Loco Shed, Tuglakabad|Tughlakabad]] ||TKDE
| colspan="3" |'''Total Locomotives Active as of 01-01-2022'''<ref>{{Cite web|title=e-Locos|url=http://elocos.railnet.gov.in/Holding/holding.html}}</ref> ||1422||
|74
|}<!-- '''Note-'''Before updating the information here anybody should check out the railways current official data first in the Reference then change the data.-->
|10
|2013
|-
| [[Electric Loco Shed, Itarsi|Itarsi]]||ETE
|89
|
|2018
|-
| colspan="3" |Total
|1733
|77
| rowspan="2" |
|-
| colspan="3" |'''Total Locomotives Active as of December 2024'''<ref>{{Cite web|title=e-Locos|url=http://elocos.railnet.gov.in/Holding/holding.html}}</ref>
| colspan="2" |1810
|}

== Gallery ==
<gallery widths="150" heights="150" class="center">
File:HWH WAP7 hauling 02302 NDLS-HWH Rajdhani Special.jpg|Howrah based WAP7 on lead with 02302 New Delhi - Howrah Rajdhani Express Special at Janai Road
File:LGD WAP7 30306.jpg|LGD WAP-7 30306 at Bangalore
File:Vijayawada WAP7 39155.jpg|Vijayawada WAP-7 39155 with 12075 Kozhikode Main Thiruvananthapuram Central Jan Shatabdi Express Skipping Thuravoor Railway Station in Kerala.
File:Tejas-express-powered-by-wap-7.jpg|New Delhi-Lucknow Tejas Express powered by WAP-7, standing at New Delhi.
File:LALLAGUDA (LGD) WAP-7.jpg|WAP-7 #30261 charging on time running 22416 NDLS-VSKP A.P. A.C. Express.
File:A Ghaziabad HOG WAP-7 with Bhubaneswar Rajdhani approaching Balasore.jpg|alt=|A Ghaziabad-based WAP-7 hauling the Bhubaneswar Rajdhani Express
File:22691 WAP7 130418.jpg|alt=|WAP-7 with the Bangalore Rajdhani Express near Lingampally Railway Station
File:RPM WAP-7.jpg|alt=|RPM based WAP-7

File:12737 Goutami Express at Moula-ali with WAP-7 loco.jpg|12737 Goutami Express at Moula-ali with a WAP-7 loco
File:Ghaziabad-based WAP-7 locomotive at Anand Vihar Terminal with the Anand Vihar-Bhagalpur Vikramshila Express train.jpg|[[Ghaziabad|Ghaziabad-based]] WAP-7 locomotive at [[Anand Vihar Terminal railway station|Anand Vihar Terminal]]
</gallery>


==See also==
==See also==

Latest revision as of 20:39, 17 December 2024

WAP-7
Vijayawada based WAP-7 at BZA ELS.
Type and origin
Power typeElectric
Builder
Build date1999-2023 (CLW)

2016-present (BLW)

2017-present (PLW)
Total produced1810 as of December 2024
Specifications
Gauge5 ft 6 in (1,676 mm)
BogiesCo-Co, Fabricated Flexicoil Mark IV bogies; bogie wheelbase 1,850 mm (72+7⁄8 in) + 1,850 mm (72+7⁄8 in)
Wheel diameter1,092 mm (43 in) new, 1,016 mm (40 in) worn
Wheelbase15,700 mm (51 ft 6+1⁄8 in)
Length:
​
 • Over beams20,562 mm (67 ft 5+1⁄2 in)
Width3,152 mm (10 ft 4+1⁄8 in)
Height:
​
 • Pantograph4,255 mm (13 ft 11+1⁄2 in)
Axle loadWAP 7

20.5 t (20.2 long tons; 22.6 short tons)[1]

WAP 7HS

18.08 t (17.79 long tons; 19.93 short tons)[2]
Loco weight123 t (121 long tons; 136 short tons)[3]
Power supply3-phase 2180 V 50 Hz
Electric system/s25 kV 50 Hz AC Overhead
Current pickup(s)Pantograph
Traction motors6FRA 6068 3-phase squirrel-cage induction motors
850 kW (1,140 hp), 2180 V, 1283/2484 rpm, 270/310A;
Weight-2,100 kg (4,600 lb), forced-air ventilation, axle-hung, nose-suspended;
Torque 6,330–7,140 N⋅m (4,670–5,270 lbf⋅ft)
~88% efficiency.
TransmissionElectric
Gear ratioWAP 7
72:20
WAP 7HS
70:22
Loco brakeAir and regenerative
Train brakesAir
Performance figures
Maximum speed140 km/h (87 mph) (WAP-7)

160 km/h (99 mph) (WAP-7HS)
Potential speed: 180 km/h (110 mph) (WAP-7HS)

155 km/h (96 mph) (WAP-7)
Power outputMax Power : 6,350 hp (4,740 kW)
Continuous: 6,120 hp (4,563.68 kW)
Tractive effortStarting : 322.4 kN (72,500 lbf)
Continuous : 228 kN (51,000 lbf) at 71 km/h
Career
OperatorsIndian Railways
Numbers
LocaleAll over India
First run19 May 2000

The Indian locomotive class WAP-7 is a class of 25 kV AC electric locomotives that was developed in 1999 by Chittaranjan Locomotive Works (CLW) for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Passenger traffic (P) locomotive, 7th generation (7). They entered service in 2000. A total of 1683 WAP-7 have been built, with more units being built at CLW, Banaras Locomotive Works (BLW) and Patiala Locomotive Works (PLW).

The WAP-7 is the most successful locomotives of Indian Railways[peacock prose] serving passenger trains since its introduction in 1999. It is a passenger variant of the WAG-9 freight locomotive with a modified gear ratio to pull lighter loads at higher speeds. With an output of 6,125 hp, it is the most powerful passenger locomotive in the Indian Railways fleet, and the most numerous passenger locomotive in India.[peacock prose] The WAP-7 is capable of hauling 24 coach trains at speeds 110–140 km/h (68–87 mph).

History

[edit]

It is now[when?] largely used by Northern Railways (NR), South Central Railways (SCR), Central Railways (CR), South East Central Railways (SECR), South Eastern Railways (SER), West Central Railways (WCR), Eastern Railways (ER), Western Railways (WR), North Central Railways (NCR), South Western Railways (SWR), Southern Railways (SR), East Central Railways (ECR), East Coast Railways (ECoR), North Eastern Railways (NER), North Western Railways (NWR), Northeast Frontier Railways (NFR) among other zones. As of October 2021, all of these are fitted with H-type transition couplers which are compatible with both screw coupling and centre-buffer coupling. In February 2017, Banaras Locomotive Works built their first WAP 7 class locomotive.[4]

In 2019, a variant of the WAP-7, designated the WAP-7HS, was introduced for higher speeds. The WAP-7HS has a max speed of 180 km/h (110 mph), and is capable of hauling a 24-car train at 160 km/h (99 mph) as opposed to the 140 km/h (87 mph) of the original. Indian Railways plans to use the WAP-7HS for Shatabdi, Rajdhani, and Duronto express trains. However, as of September 2022, it has not been confirmed if any others have been built, and the single completed WAP-7HS has stayed restricted to 130 km/h (81 mph).

Head-on Generation (HOG)

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The HOG ports are equipped on right side upper and left side down on Erode based WAP-7 at White Field railway station

A main feature of Majority locomotives of this class is that they eliminate the need to have separate End on Generation (EOG) sets or DG (Diesel Generator) sets for supplying power to the train resulting in significant savings on maintenance and running costs. This technology, called HOG or "Head On Generation", transfers electric power from the loco's pantograph to the coaches instead of EOG where a power car equipped with diesel generator capable of generating adequate power of 3-phase 50 Hz 415 V / 750 V AC (called 'head-end power') is provided at either end of the train rake to supply power.[5][6][7]

Locomotive sheds

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Zone Name Shed Code Quantity Introduction Year
HOG Non HOG
Central Railway Ajni AQE 65 4 2010
Kalyan KYNE 70 4 2019
Pune PADX 46 2023
Eastern Railway Howrah HWHE 89 2012
Sealdah SDAD 21 9 2020
East Central Railway Gomoh GMOE 46 2000
Barauni BJUE 6 2021
Samastipur SPJD 51 2022
East Coast Railway Visakhapatnam WATE 82 2016
Northern Railway Ghaziabad GZBE 114 27 2000
Ludhiana LDHE 44 2022
North Central Railway Kanpur CNBE 87 2019
North Eastern Railway Gonda GDDX 17 2021
Gorakhpur GKPL 13 2024
Izzatnagar IZN 1 2024
Northeast Frontier Railway Siliguri SGUD 15 2024
North Western Railway Bhagat Ki Kothi BGKD 44 2023
Southern Railway Erode EDE 76 2017
Royapuram RPME 111 5 2011
South Central Railway Lallaguda LGDE 135 16 2008
Vijayawada BZAE 71 2021
South Eastern Railway Tatanagar TATE 63 2017
Bondamunda BNDL 16 2018
Santragachi SRCE 22 2017
South East Central Railway Bhilai BIAE 13 2012
South Western Railway Krishnarajapuram KJMD 70 2019
Hubli UBLD 12 2024
Western Railway Vadodara BRCE 127 2016
Valsad BLEE 45 2024
West Central Railway Tughlakabad TKDE 74 10 2013
Itarsi ETE 89 2018
Total 1733 77
Total Locomotives Active as of December 2024[8] 1810
[edit]
  • Howrah based WAP7 on lead with 02302 New Delhi - Howrah Rajdhani Express Special at Janai Road
    Howrah based WAP7 on lead with 02302 New Delhi - Howrah Rajdhani Express Special at Janai Road
  • LGD WAP-7 30306 at Bangalore
    LGD WAP-7 30306 at Bangalore
  • Vijayawada WAP-7 39155 with 12075 Kozhikode Main Thiruvananthapuram Central Jan Shatabdi Express Skipping Thuravoor Railway Station in Kerala.
    Vijayawada WAP-7 39155 with 12075 Kozhikode Main Thiruvananthapuram Central Jan Shatabdi Express Skipping Thuravoor Railway Station in Kerala.
  • New Delhi-Lucknow Tejas Express powered by WAP-7, standing at New Delhi.
    New Delhi-Lucknow Tejas Express powered by WAP-7, standing at New Delhi.
  • WAP-7 #30261 charging on time running 22416 NDLS-VSKP A.P. A.C. Express.
    WAP-7 #30261 charging on time running 22416 NDLS-VSKP A.P. A.C. Express.
  • A Ghaziabad-based WAP-7 hauling the Bhubaneswar Rajdhani Express
  • WAP-7 with the Bangalore Rajdhani Express near Lingampally Railway Station
  • RPM based WAP-7
  • 12737 Goutami Express at Moula-ali with a WAP-7 loco
    12737 Goutami Express at Moula-ali with a WAP-7 loco
  • Ghaziabad-based WAP-7 locomotive at Anand Vihar Terminal
    Ghaziabad-based WAP-7 locomotive at Anand Vihar Terminal

See also

[edit]

References

[edit]
  1. ^ "[IRFCA] Indian Railways FAQ - AC Electric Locomotives".
  2. ^ "What are the specifications of WAP 7 HS?".
  3. ^ "[IRFCA] Indian Railways FAQ - AC Electric Locomotives".
  4. ^ "Brief History of DLW". Ministry of Railways, Government of India. Retrieved 30 December 2017.
  5. ^ "Train had WAP-7 engine, 'black box' may reveal cause". Zee News. 9 August 2010. Retrieved 25 August 2012.
  6. ^ "Recent Developments". Chittaranjan Locomotive Works. Retrieved 25 August 2012.
  7. ^ "Development of Electric locomotive with Head On Generation (HOG) facility" (PDF). Indian Railways.
  8. ^ "e-Locos".
[edit]
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