https://indianpedia.org/index.php?action=history&feed=atom&title=Indian_locomotive_class_WAG-4Indian locomotive class WAG-4 - Revision history2026-08-01T06:16:06ZRevision history for this page on the wikiMediaWiki 1.45.4https://indianpedia.org/index.php?title=Indian_locomotive_class_WAG-4&diff=122678&oldid=prev>JND AMD at 10:56, 24 December 20202020-12-24T10:56:32Z<p></p>
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{{Infobox locomotive<br />
| name = WAG-4<br />
| image = <br />
| alt = <br />
| caption = Diagram of the Wag-4<br />
| powertype = Electric<br />
| builder = [[Chittaranjan Locomotive Works|CLW]]<br />
| gauge = {{Track gauge|5ft6in|lk=on}}<br />
| poweroutput = MAX:2930HP Continuous: {{convert|2930|hp|kW|0|abbr=on}}<br />
| maxspeed = {{convert|112|km/h|mph|0|abbr=on}}<br />
| tractiveeffort = Starting : {{convert|25000|kgf|kN lbf|abbr=on}}<br />
| builddate = 1963-1966<br />
| uicclass = B-B <br />
| bogies = Monomotor B-B bogies<br />
| wheeldiameter = New:{{convert|1140|mm|ftin|0|abbr=on}}<br>Half worn: {{convert|1120|mm|ftin|abbr=on|frac=2}}<br>Full worn: {{convert|1064|mm|ftin|0|abbr=on}}<br />
| length = {{convert|14.600|m|ftin|abbr=on|frac=32}}<br />
| height = {{convert|4.165|m|ftin|abbr=on|frac=32}}<br />
| width = {{convert|3.109|m|ftin|abbr=on|frac=32}}<br />
| axleload = {{convert|18640|kg|abbr=on}}<br />
| locoweight = {{convert|74000|kg|abbr=on}}<br />
| tractionmotors = Siemens/ACEC/Alstom MG 710A (740hp, 1250V, 480A, 1000 rpm).Fully suspended, force- ventilated.<br />
| locobrakes = [[Railway air brake|Air]]<br />
| trainbrakes = vacuum train brakes.<br />
| operator = [[Indian Railways]]<br />
| fleetnumbers = 20700-20709 (Niv. / SFAC) 20710-20791 (CLW) 20849-20868 (Niv. / SFAC) <br />
| totalproduction = 112<br />
| aarwheels = B-B<br />
| electricsystem = {{25 kV 50 Hz}} [[Alternating current|AC]] [[Overhead line|Overhead]] <br />
| collectionmethod = [[pantograph (rail)|pantograph]]<br />
| locale = All over [[India]]<br />
| disposition = Retired<br />
}}<br />
The Indian locomotive class '''WAG-4''' is a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[electric locomotive]]s that was manufactured by [[Chittaranjan Locomotive Works|CLW]] in the late 1960s for [[Indian Railways]]. The model name stands for [[5 ft 6 in gauge railway|broad gauge (W)]], AC Current (A), Goods traffic (G) engine, 1st (1). A total of 186 WAG-4 locomotives were built by The European Group 50&nbsp;Hz Group/European Group/50 Cycles Group (consortium) between 1967 and 1969. They entered service in 1967.<ref>https://www.irfca.org/faq/faq-specs.html#WAG-4 &#91;IRFCA&#93; Indian Railways FAQ: Diesel and Electric Locomotive Specifications</ref><br />
<br />
The WAG-4 served both passenger and freight trains for over 40 years. As of January 2020, All locomotives have been removed from service all but one were scrapped.<br />
<br />
== History ==<br />
The first fifty-six locomotive's equipment were procured from European Group. They had Auxiliary machines and some control equipments have been procured from indigenous sources. All these locomotives were built by CLW. The typical feature of these locomotives is Monomotor Bogie. This construction results in substantial saving in weight in traction equipment and gives better adhesion. These locomotives utilise silicon rectifiers for conversion of ac power into dc. The traction motors are force ventilated and are fully suspended type. These motors are permanently grouped in parallel and speed control is obtained through HT tap changer and TM field weakening.<br />
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These locomotives can be used for a multiple unit operation to a maximum of four locomotives with compressed air brake for the loco and vacuum brake for the train are provided. In addition, these locomotives are also provided with rheostatic braking. Few locomotives have been converted to dual brake system later on by Railways.<br />
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== Specification ==<br />
*Build dates: 1966-71<br />
*Wheel arrangement: B-B ( monomotor bogies like WAG 1 )<br />
*Traction Motors: ACEC make, MG 1580 A1 (1160&nbsp;kW, 1270 V, 1040 A, 690 rpm, weight 5850&nbsp;kg). Fully suspended, bogie-mounted.<br />
*Gear Ratio: 3.95 : 1<br />
*Transformer: Oerlikon BOT 3460. 32 taps.<br />
*Rectifiers: Two GL 82220 silicon rectifiers, 1000 A / 1270&nbsp;kW/1270 V. Weight 650&nbsp;kg each.<br />
*Axle Load: 21.9 t<br />
*Hauling capacity: 2000 t<br />
Manufacturer:Chittaranjan Locomotive Works ( CLW )<br />
;Variants<br />
*WAG-4D (D stands for Dual braking ie it can haul both vacuum and air brake stock wagons)<br />
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== Locomotive shed ==<br />
* All the locomotives of this class has been withdrawn from service.<br />
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==See also==<br />
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*[[History of rail transport in India]]<br />
*[[Indian Railways]]<br />
*[[Locomotives of India]]<br />
*[[Rail transport in India]]<br />
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{{commons category|Indian locomotive class WAG4}}<br />
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==References==<br />
{{Notelist-lr}}<br />
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{{reflist}}<br />
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== External links ==<br />
*[https://www.irfca.org/faq/faq-loco2e.html#wag-4 &#91;IRFCA&#93; Indian Railways FAQ: Locomotives—Specific classes : AC Electric]<br />
*[https://www.irfca.org/faq/faq-specs.html#WAG-4 &#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:B-B locomotives]]<br />
[[Category:Electric locomotives of India]]<br />
[[Category:Railway locomotives introduced in 1967]]<br />
[[Category:5 ft 6 in gauge locomotives]]<br />
[[Category:Chittaranjan Locomotive Works locomotives]]</div>>JND AMD