https://indianpedia.org/index.php?action=history&feed=atom&title=Indian_locomotive_class_WAP-1Indian locomotive class WAP-1 - Revision history2026-07-31T21:48:33ZRevision history for this page on the wikiMediaWiki 1.45.4https://indianpedia.org/index.php?title=Indian_locomotive_class_WAP-1&diff=122687&oldid=prev103.240.77.138 at 15:54, 11 May 20212021-05-11T15:54:04Z<p></p>
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{{Infobox locomotive<br />
| name = WAP-1<br />
| image = File:AJJ WAP1.jpg<br />
| caption = Arakkonam based WAP-1 (no. 22004) <br />
| powertype = Electric<br />
| builder = [[Chittaranjan Locomotive Works]], [[West Bengal]], [[India]]<br />
| gauge = {{Track gauge|5ft6in|lk=on}}<br />
| poweroutput = MAX:3900HP Continuous: {{convert|3760|hp|kW|0|abbr=on}}<br />
| maxspeed = {{convert|130|km/h|mph|0|abbr=on}}<br />
| tractiveeffort = Starting : {{convert|22400|kgf|kN lbf|abbr=on}}<br />
| builddate = 1980-1996<br />
| uicclass = [[Co′Co′]]<br />
| bogies = [[Flexicoil]] (cast steel bogies); primary and secondary wheel springs with bolsters<br />
| wheeldiameter = New:{{convert|1092|mm|ftin|0|abbr=on}}<br>Half worn: {{convert|1055|mm|ftin|abbr=on|frac=2}}<br>Full worn: {{convert|1016|mm|ftin|0|abbr=on}}<br />
| length = {{convert|18.794|m|ftin|abbr=on|frac=32}}<br />
| height = {{convert|4.272|m|ftin|abbr=on|frac=32}}<br />
| width = {{convert|3.179|m|ftin|abbr=on|frac=32}}<br />
| axleload = {{convert|18800|kg|abbr=on}}<br />
| locoweight = {{convert|112000|kg|abbr=on}}<br />
| tractionmotors =[[Alstom/CLW]] TAO 659<br />
| locobrakes = [[Railway air brake|Air]]<br />
| trainbrakes =Air,Dual<br />
| safety = Slip control, Over voltage relay, Main overload relay, Earth Fault Relay, Low Pressure Governor, Brake Cylinder Cutoff Valve, Train parting alarms and No OHE volt relay<br />
| operator = [[Indian Railways]]<br />
| fleetnumbers = '''22000-22076''', many being converted to '''WAP-4'''<br />
| totalproduction = '''WAP-1:''' 65<br />
| aarwheels = C-C<br />
<br />
| electricsystem = {{25 kV 50 Hz}} [[Overhead line|Overhead]] <br />
| collectionmethod = [[pantograph (rail)|pantograph]]<br />
| locale = All over [[India]]<br />
| disposition = Active<br />
}}<br />
<br />
The Indian locomotive class '''WAP-1''' is a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[electric locomotive]]s that was developed in 1978 by [[Chittaranjan Locomotive Works]] for [[Indian Railways]]. The model name stands for [[5 ft 6 in gauge railway|broad gauge (W)]], AC Current (A), Passenger traffic (P) engine, 1st generation (1). They entered service in late 1979. A total of 65 WAP-1 were built at CLW between 1979 and 1996, which made them the most numerous class of mainline electric passenger locomotive until its successor, the [[Indian locomotive class WAP-4|WAP-4]].<br />
<br />
The WAP-1 is India's first dedicated electric [[passenger locomotive]] of Indian Railways having served both passenger and freight trains for over 40 years. This class provided the basic design for a number of other locomotives like WAP-3 and WAP-4 models. However, with the advent of new 3-phase locomotives like [[Indian locomotive class WAP-5|WAP-5]] and [[Indian locomotive class WAP-7|WAP-7]], the WAP-1 locomotives were relegated to hauling smaller express and passenger trains and now the aging fleet the WAP-1 locomotives are being slowly withdrawn from mainline duties and scrapped.<br />
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As of January 2020, 55 locomotives still retain "operational status" on the mainline as WAP-1, with further examples having been converted to [[Indian locomotive class WAP-4|WAP-4]].<br />
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==Development==<br />
<br />
===Background===<br />
In the early 1980s, Indian Railways began considering developing a passenger version of its [[Indian locomotive class WAM-4|WAM-4]] class...<ref>https://rdso.indianrailways.gov.in/works/uploads/File/raj-icf17.pdf</ref> Designed for both passenger and goods trains the WAM-4 was one of the most successful locomotives of the 1967s and a mainstay of the Indian Railways.<br />
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Five prototype locomotives of this type were ordered from [[Chittaranjan Locomotive Works|CLW]] to the design of RDSO. The first prototype locomotive was put into service in 1981.<ref>{{cite web|access-date=2019-06-19|title=[IRFCA] A Brief History of Railway Electrification in India|url=https://www.irfca.org/articles/electric-2.html|website=www.irfca.org}}</ref> They were first used on the [[Howrah Rajdhani Express]].<ref>https://rdso.indianrailways.gov.in/works/uploads/File/raj-icf17.pdf</ref><br />
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The locomotive is powered by six axle-hungs, nose-suspended forced ventilated type DC traction motors. Speed control is achieved by grouping in 2S-3P combination and by field weakening of the motor. It utilises a silicon rectifier for conversion of AC power into DC.{{efn-lr| The [[Great Indian Peninsula Railway]] {{illm|GIPR EA/1{{!}}EA/1|de|GIPR-Klasse EA/1}} class of 1928 may disagree.}}<ref>https://24coaches.com/electric-locomotive-roster-the-wap-series/</ref><br />
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They are being converted to make them suitable for multiple operation. Compressed air brake for the locomotives and vacuum brake for the train are provided. The brake system is being modified to make them suitable for dual brakes.<br />
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The WAP-1 provided the basis for the [[Indian locomotive class WAP-4|WAP-4]].<br />
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== Variants ==<br />
{{Main|Indian Locomotive Class WAP-3}}<br />
The WAP-3 is the upgraded variant of the WAP-1 with better top speed. All units of this class were WAP-1 units already in service. The first locomotive converted was a WAP-1 '22005' named Jawahar. Subsequently 8 more WAP-1 were converted, But since the class were not a great success and had performance issues these were converted back to WAP-1.<br />
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==Image gallery==<br />
<gallery widths="225" perrow="4"><br />
File:TKD WAP1.jpg|Tughlakabad DLS based WAP-1 hauling Vasco - Danapur one way special fare<br />
File:2925 Paschim Express with a WAP 1 engine.JPG|2925 Paschim Express with a WAP-1<br />
File:'RajHans' TKD WAP1 22006 Standing at Katihar.jpg|TKD WAP1 22006 RajHans at Katihar<br />
File:WAP1-22018.jpg|WAP-1<br />
File:A WAP1 from Arakkonam hauls Trivandrum bound Guwahati Express.jpg|AJJ WAP-1 with WAP-4 livery hauls Trivandrum bound Guwahati Express<br />
File:WAP-1 loco hauling 59355 (Ratlam-Mathura) Passenger.jpg|AJJ WAP-1 in full WAP-4 livery.<br />
File:12497 (NDLS-ASR) Shaan-e-Punjab Express with WAP-1.jpg|12497 (NDLS-ASR) Shaan-e-Punjab Express with a WAP-1<br />
File:WAP1 ^22076 Aastha of GZB waiting for its scheduled departure with Agra bound ICE at LJN - Flickr - Dr. Santulan Mahanta.jpg|WAP1 22076 Aastha of GZB with Agra bound ICE at LJN<br />
File:WAP-1 Locomotive at Delhi.jpg|WAP-1 with Raj Livery at Delhi<br />
</gallery><br />
<br />
==Locomotive sheds==<br />
{| class="wikitable"<br />
|-<br />
! Zone !! Name !! Shed Code !! Quantity<br />
|-<br />
| [[Northern Railway zone|Northern Railway]] || [[Tughlakabad railway station|Tughlakabad]] || TKD(D) || 31<br />
|-<br />
| [[Southern Railway Zone|Southern Railway]]||[[Diesel Loco Shed, Erode|Erode]] || ED(D)|| 28<br />
|-<br />
| colspan="3" |'''Total Locomotives Active as of 01-04-2021'''<ref>{{Cite web|title=e-Locos|url=http://elocos.railnet.gov.in/Holding/holding.html}}</ref> || 59<br />
|}<br />
<br /><!-- '''Note-'''Before updating the information here anybody should check out the railways current official data first in the Reference then change the data.--><br />
<br />
==See also==<br />
<br />
*[[History of rail transport in India]]<br />
*[[Indian Railways]]<br />
*[[Locomotives of India]]<br />
*[[Rail transport in India]]<br />
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==References==<br />
{{Notelist-lr}}<br />
<br />
{{reflist}}<br />
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== External links ==<br />
{{commons category|Indian locomotive class WAP1}}<br />
*[https://24coaches.com/electric-locomotive-roster-the-wap-series/ Electric Locomotive Roster: The WAP Series!]<br />
*[https://www.irfca.org/faq/faq-loco2e.html#wap-1 &#91;IRFCA&#93; Indian Railways FAQ: Locomotives—Specific classes : AC Electric]<br />
*[https://www.irfca.org/faq/faq-specs.html#WAP-1 &#91;IRFCA&#93; Indian Railways FAQ: Diesel and Electric Locomotive Specifications]<br />
*[http://www.indianrailways.gov.in/railwayboard/uploads/codesmanual/ACTraction-I/AcTractionI_ADDITIONAL_Data.htm 11081 Colour Photographs], [[Indian Railways]]<br />
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{{Broad gauge locomotives of India}}<br />
<br />
[[Category:25 kV AC locomotives]]<br />
[[Category:Co-Co locomotives]]<br />
[[Category:Electric locomotives of India]]<br />
[[Category:Railway locomotives introduced in 1980]]<br />
[[Category:5 ft 6 in gauge locomotives]]<br />
[[Category:Chittaranjan Locomotive Works locomotives]]</div>103.240.77.138