>Saptak m5az at 08:08, 26 June 2021

2021-06-26T08:08:34Z

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{{Use dmy dates|date=May 2019}}
{{Use Indian English|date=May 2019}}
{{Infobox locomotive
| name = WAP-6<ref name=IRFCAspecs>{{cite web|url=http://www.irfca.org/faq/faq-specs.html#WAP-6 |title=IRFCAspecs}}</ref>
| image = File:Kaziranga Express (SBC-Guwahati) at Khalor, West Bengal.jpg
| caption = A Former WAP-6 hauling [[Kaziranga Express]]
| powertype = Electric
| builder = [[Chittaranjan Locomotive Works|CLW]]
| builddate = 1997
| totalproduction = 17
| rebuilddate = August, 2012
| numberrebuilt = 22401-22416
| uicclass = Co'-Co'
| gauge = {{RailGauge|1676mm|lk=on}}
| bogies = originally Flexicoil Mark IV Fabricated;converted to Co'-Co' Flexicoil Mark 1 cast bogies; primary and secondary wheel springs with bolsters
| 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}}
| length = {{convert|18.79|m|ftin|abbr=on|frac=32}}
| height = {{convert|4.235|m|ftin|abbr=on|frac=16}}
| axleload = {{convert|18800|kg|abbr=on}}
| locoweight = {{convert|113200|kg|abbr=on}}
| tractionmotors = [[Hitachi]] HS15250
| maxspeed = Intended at {{convert|140|km/h|0|abbr=on}}; Restricted:{{convert|105|km/h|0|abbr=on}}
| electricsystem = {{25 kV 50 Hz}}, [[Alternating current|AC]] [[Overhead line|Overhead]]
| collectionmethod = [[pantograph (rail)|pantograph]]
| poweroutput = Max: {{convert|5350|HP|abbr=on}}<br />Continuous: {{convert|5000|HP|abbr=on}}
| tractiveeffort = Starting:{{convert|30.8|t|0|abbr=on}} <br />Continuous:{{convert|19|t|0|abbr=on}}
| locobrakes = [[Railway air brake|Air]]/[[Parking brake#Railroad hand brakes|Hand]]
| trainbrakes = Air
| safety = Slip control, Over voltage relay and No volt relay
| operator = [[Indian Railways]]
| fleetnumbers = 22400-22416
| locale = [[Eastern Railway zone|Eastern Railway]]
| withdrawndate = August, 2012
| disposition = One scrapped remainder rebuilt
}}

The Indian locomotive class '''WAP-6''' is a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[Electric locomotive|electric locomotives]] that was developed in the 1997 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), 6th generation (6) locomotive. They entered service in April 1996. A total of 17 WAP-6 units were built at CLW between 1995 and 1998.

The WAP-6 were intended to be the faster variant of the successful WAP-4, but failed trials and were restricted to a top speed of 105km/h. Now all units have been converted to WAP-4 specifications. All were homed at [[Asansol]] (ASN) shed but after conversion reallocated to [[Howrah]] (HWH) shed.

== History ==

This class was actually variant of the WAP-4 design where Co-Co Flexicoil Mark 1 cast bogies of the usual WAP4 was replaced by Fabricated Flexicoil Mark IV bogies. All other specifications were same as WAP4. WAP-1 unit no. 22212 was the first to be rebuilt into a WAP-6. It was provided with Flexicoil bogies and other upgrades. Then it was rebuilt into [[Indian locomotive class WAP-4|WAP-4]]. Later, more WAP-1 units were re-geared and provided with high-adhesion fabricated bogies (Flexicoil Mark IV) which are somewhat similar to [[American Locomotive Company|ALCO]] hi-adhesion bogies. They were intended to reach {{convert|140|km/h|abbr=on}} but failed to do so in trials and were restricted at {{convert|105|km/h|abbr=on}}. Two units,i.e., 22406 and 22408 are upgraded with better [[Wheelset (rail transport)|wheel-sets]]. This class was an unsuccessful one. All have been converted back as [[Indian locomotive class WAP-4|WAP-4]]. About 16 of these were built (All in the number series 22400-22416.).<ref name="IRFCA">{{cite web|title=WAP6|url=http://www.irfca.org/faq/faq-loco2e.html}}</ref>

== Technical specifications ==

{| class="wikitable"
|-
!colspan="2"|Technical specification<ref name=Trainweb>{{cite web|url=http://trainweb.org/railworld/Electric_Locos/wap6.htm |title=Trainweb}}</ref>
|-
| Traction motors || Axle-hung, nose-suspended, force-ventilated, {{convert|3485|kg|abbr=on}}, {{convert|630|kW|abbr=on}}, 750 V, 900 A, 895 RPM, parallel grouping, C class armature and field, temperature rise (Armature 60, filed 70 and commutator 85) in °C, coil resistance (armature 0.01284 ohms+10%, field 0.01184 ohms+10% and commutator 0.00907 ohms+10%, air gap main pole 6.35 kVA, air gap inter-pole {{convert|10|mm|4|abbr=on}}
|-
| Gear ratio || 58:23
|-
| Transformer || CCL make, [[aluminium]] coil, 3400 kVA, 32 taps
|-
| Rectifier || 2 silicon rectifier cubicle 2700 A, 1050 V
|-
| Number of sandboxes || 4
|-
| 2 Headlights || 250 W, 32 V
|-
| Lead acid Battery || 50 cells, 110 V (rated 5 hr)
|-
| Arno Converter || 216 kVA
|-
| 2 [[Fläkt Group|FLAKT]] smoothing reactor blower || PHMX-40
|-
| 2 Silicon Rectifier Blower || {{convert|60|kg|0|abbr=on}}
|-
| Oil cooler blower || S.F. India Ltd.
|-
| Smoothing reactor for traction motor || SL-30 type, 1350 A, 1270 V, 2 Coils, 0.00535 ohms resistance at {{convert|110|°C}}
|-
|}

==Hauling capacity==
If the average weight of [[Integral Coach Factory|ICF]] coaches is 55 tonnes then:
{| class="wikitable"
|-
!Grades/km/h !! Start !! 20 !! 40 !! 60 !! 70 !! 80 !! 90 !! 100 !! 110 !! 120 !! 130 !! 140 !! 150 !! 160
|-
| '''Level'''|| 1500+|| 1500+|| 1500+|| 1500+ || 1500+ || 1500+ || 1500+ || 1500+ || 1500+ || 1500+ || 1500+ || 1155 || 805 || 570
|-
| '''1 in 500''' || 1500+ || 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1105 || 805 || 565 || 400
|-
| '''1 in 200''' || 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+ || 1320|| 1230|| 1035|| 730|| 535|| 375|| 260
|-
| '''1 in 150''' || 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1500+|| 1405|| 1090|| 1020|| 860|| 610|| 445|| 310|| 215
|-
| '''1 in 100''' || 1500+|| 1570|| 1490|| 1405|| 1365|| 1195|| 1020|| 795|| 750|| 635|| 445|| 320|| 220|| 145
|-
| '''1 in 50''' || 1160|| 770|| 750|| 720|| 710|| 625|| 530|| 410|| 390|| 325|| 220|| 150|| 90|| 45
|}
'''* Except One all the locomotives are rebuild back to wap-4.'''
==See also==

* [[Indian Railways]]
*[[Locomotives of India]]
*[[Rail transport in India]]

==References==
{{reflist}}

{{Broad gauge locomotives of India |state=collapsed}}

;'

[[Category:Electric locomotives of India]]
[[Category:25 kV AC locomotives]]
[[Category:Co-Co locomotives]]
[[Category:5 ft 6 in gauge locomotives]]
[[Category:Railway locomotives introduced in 1997]]

Indian locomotive class WAP-6 - Revision history

>Saptak m5az at 08:08, 26 June 2021