Indian locomotive class WAG-8: Difference between revisions

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{{Use dmy dates|date=May 2020}}
{{Use dmy dates|date=May 2020}}
{{Use Indian English|date=May 2020}}
{{Use Indian English|date=May 2020}}
{{Original research|date=October 2024}}
{{Infobox locomotive
{{Infobox locomotive
| name = WAG-8
| name = WAG-8
| image =  
| image =
| caption = Indian Locomotive WAG-8 standing at a siding
| caption = BHEL made WAG-8 (unsuccessful during trial run) resting inside BHEL yard, Jhansi
| alt = Indian locomotive class WAG-8 inside Bhel, Jhansi
| alt = Indian locomotive class WAG-8 inside Bhel, Jhansi
| builder = [[Bharat Heavy Electricals Limited]]
| builder = [[Bharat Heavy Electricals Limited]]
| serialnumber =  
| serialnumber =  
| builddate = 1996
| builddate = 1990
| uicclass = Co'Co'
| uicclass = Co'-Co'
| gauge = {{RailGauge|5ft6in|lk=on}}
| gauge = {{RailGauge|5ft6in|lk=on}}
| bogies = Alco High-Adhesion bogies
| bogies = Alco High-Adhesion bogies
| wheeldiameter = New: {{convert|1029|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}}
| wheeldiameter = New: {{convert|1029|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}}
| wheelbase = {{convert|13380|mm|ftin|abbr=on}}
| wheelbase = {{convert|13380|mm|ftin|abbr=on}}
| length = {{convert|19880|mm|ftin|0|abbr=on}}
| length = {{convert|19880|mm|ftin|0|abbr=on}}
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| tractionmotors = 6 Hitachi HS15250A
| tractionmotors = 6 Hitachi HS15250A
| multipleworking = 3
| multipleworking = 3
<br />
 
| tractiveeffort = Starting : {{convert|300|kN|abbr=on}}
| tractiveeffort = Starting: {{convert|300|kN|abbr=on}}
| locobrakes = [[Railway air brake|Air]] and [[Regenerative brake|Regenerative]]
| locobrakes = [[Railway air brake|Air]] and [[Regenerative brake|Regenerative]]
| trainbrakes = Air
| trainbrakes = Air
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| deliverydate =  
| deliverydate =  
| firstrundate =  
| firstrundate =  
| disposition = All locomotives scrapped
| disposition = Stored
| powertype = Electric
| powertype = Electric
| poweroutput = {{convert|5000|hp|abbr=on}}
| poweroutput = {{convert|5000|hp|abbr=on}}
| operator =  
| operator =  
| fleetnumbers = No IR numbers
| fleetnumbers = No IR numbers
| totalproduction = '''1 or 2'''
| totalproduction = 1 (possibly 2)
| electricsystem = {{25 kV 50 Hz}}
| electricsystem = {{25 kV 50 Hz}}
| maxspeed = {{convert|100|km/h|abbr=on}} DC, {{convert|100|km/h|abbr=on}} AC
| maxspeed = {{convert|100|km/h|abbr=on}}
| collectionmethod = [[Pantograph (rail)|Pantographs]]
| collectionmethod = [[Pantograph (rail)|Pantographs]]
| locale = Inside BHEL, Jhansi
| locale = Inside BHEL yard, Jhansi
}}
}}


The Indian locomotive class '''WAG-8''' is a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[electric locomotive]]s that was developed in the 1990s by [[Bharat Heavy Electricals Limited]] (BHEL) for [[Indian Railways]]. The model name stands for [[5 ft 6 in gauge railway|broad gauge (W)]], AC Current (A), Freight traffic (G) engine, 8th generation (8). They were only prototypes locomotives .
The Indian locomotive class '''WAG-8''' was a class of 25 [[Volt|kV]] [[Alternating current|AC]] [[electric locomotive]]s that was developed in the early 1990s by [[Bharat Heavy Electricals Limited]] (BHEL) for [[Indian Railways]]. The model name stands for [[5 ft 6 in gauge railway|broad gauge (W)]], AC current (A), freight/goods traffic (G), eighth-generation (8). Only two units of this class were built, both prototypes.


This class provided the basic design for a number of other locomotives like [[Indian locomotive class WCAM 2/2P|WCAM-2]], [[Indian locomotive class WCAM 3|WCAM-3]] and [[Indian locomotive class WCAG-1|WCAG-1]].
This class provided the basic design for a number of other locomotives like the [[Indian locomotive class WCAM 2/2P|WCAM-2]], the [[Indian locomotive class WCAM-3|WCAM-3]] and the [[Indian locomotive class WCAG-1|WCAG-1]].


== History ==
== History ==
The history of WAG-8 begins in the early 1990s with the aim of addressing the shortcomings of the previous [[Indian locomotive class WAG-5|WAG-5]]  class and remove [[steam locomotive]]s from IR by a target date of 1990. The WAG-5 though were greatly successes, had become underpowered to meet the growing demands of the Indian Railways. So in early 1990s decided to look for a successor the WAG-5 class. The required specification was of a 5000 horsepower locomotive.
The history of WAG-8 begins in the early 1990s with the aim of addressing the shortcomings of the previous [[Indian locomotive class WAG-5|WAG-5]]  class and remove [[steam locomotive]]s from IR by a target date of 1990. The WAG-5, although successful, had become underpowered to meet the growing demands of the Indian Railways. So in the early 1990s BHEL decided to look for a successor to the WAG-5 class. The required specification was of a 5000-horsepower locomotive.{{Or inline|date=October 2024}}


Initially, the Indian railways invited tenders to build locomotives to the new specification. The following responses were received:
Initially, Indian Railways invited tenders to build locomotives to the new specification. The following responses were received:


* CLW submitted their upgraded WAG-5 model with 5000&nbsp;hp with Co-Co bogies.
* CLW submitted their upgraded WAG-5 model with 5000&nbsp;hp with Co-Co bogies.
* BHEL submitted a 5000&nbsp;hp locomotive with [[Thyristor|thyristors control]] and  Co-Co bogies
* BHEL submitted a 5000&nbsp;hp locomotive with [[Thyristor|thyristors control]] and  Co-Co bogies


Each company submitted their prototypes and Indian Railways designated these prototypes as the [[Indian locomotive class WAG-7|WAG-7]] class and WAG-8 class respectively.<ref>{{Cite web|title=[IRFCA] Indian Railways FAQ: Locomotives - General Information - I|url=https://www.irfca.org/faq/faq-loco.html#class|website=www.irfca.org|access-date=2020-04-18}}</ref> Development on the WAG-8 class in 1990 while BHEL was also manufacturing WAG-5HS. Technologically the BHEL WAG-8 was meant to be superior to the WAG-7 which was effectively using [[Tap changer|tap-changer]] technology from the 1960s. They most likely had the Hitachi HS15250A seen in present day [[Indian locomotive class WCAM 3|WCAM-3]] and [[Indian locomotive class WCAG-1|WCAG-1]].These locos were to be handed it over to Railways for trial in December, 1992, but the whole project was cancelled due to arrival of the [[Indian locomotive class WAG-9|WAG-9]] and thyristors control had become obsolete to 3 Phase AC technology. The prototype locomotive was subsequently condemned and parked on an unused rail sliding at [[BHEL Jhansi|BHEL, Jhansi]].<ref>{{Cite web|title=2906557-0: The only WAG-8 prototype of India, lying - Railway Enquiry|url=https://indiarailinfo.com/blog/post/2906557|last=Naphade|first=Ankit|website=indiarailinfo.com|access-date=2020-05-24}}</ref><ref>{{Cite web|title=Diesel Locomotive Roster – The WAG Series|url=https://24coaches.com/electric-locomotive-roster-the-wag-series/|date=2013-10-30|website=24 Coaches|language=en-US|access-date=2020-04-29}}</ref>
Each company submitted their prototypes and Indian Railways designated these prototypes as the [[Indian locomotive class WAG-7|WAG-7]] class and WAG-8 class respectively.<ref>{{Cite web|title=[IRFCA] Indian Railways FAQ: Locomotives - General Information - I|url=https://www.irfca.org/faq/faq-loco.html#class|website=www.irfca.org|access-date=2020-04-18}}</ref> Development on the WAG-8 class in 1990 while BHEL was also manufacturing WAG-5HS. Technologically the BHEL WAG-8 was meant to be superior to the WAG-7 which was effectively using [[Tap changer|tap-changer]] technology from the 1960s. They most likely had the Hitachi HS15250A seen in present-day [[Indian locomotive class WCAM-3|WCAM-3]] and [[Indian locomotive class WCAG-1|WCAG-1]]. The WAG-8 locomotives were to be handed over to Railways{{Which|date=October 2024}} for trial in December, 1992, but the whole project was cancelled due to arrival of the [[Indian locomotive class WAG-9|WAG-9]], and thyristors control had become obsolete in favour of 3-phase AC technology. The prototype locomotive was subsequently condemned and parked on an unused rail sliding at [[BHEL Jhansi|BHEL, Jhansi]], where it remained as of 2017.<ref>{{Cite web|title=2906557-0: The only WAG-8 prototype of India, lying - Railway Enquiry|url=https://indiarailinfo.com/blog/post/2906557|last=Naphade|first=Ankit|website=indiarailinfo.com|access-date=2020-05-24}}</ref><ref>{{Cite web|title=Diesel Locomotive Roster – The WAG Series|url=https://24coaches.com/electric-locomotive-roster-the-wag-series/|date=2013-10-30|website=24 Coaches|language=en-US|access-date=2020-04-29}}</ref>
<br />'''* This locomotive was never went into service in railway. '''
<br />


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


*[[History of rail transport in India]]
*[[Rail transport in India#History]]
*[[Indian Railways]]
*[[Indian Railways]]
*[[Locomotives of India]]
*[[Locomotives of India]]
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{{Broad gauge locomotives of India |state=collapsed}}
{{Broad gauge locomotives of India |state=collapsed}}


{{DEFAULTSORT:WAG-8}}
[[Category:Electric locomotives of India]]
[[Category:Electric locomotives of India]]
[[Category:25 kV AC locomotives]]
[[Category:25 kV AC locomotives]]
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[[Category:Railway locomotives introduced in 1996]]
[[Category:Railway locomotives introduced in 1996]]
[[Category:5 ft 6 in gauge locomotives]]
[[Category:5 ft 6 in gauge locomotives]]
[[Category:Freight locomotives]]
[[Category:BHEL locomotives]]
[[Category:BHEL locomotives]]

Latest revision as of 12:32, 27 October 2025


WAG-8
Type and origin
Power typeElectric
BuilderBharat Heavy Electricals Limited
Build date1990
Total produced1 (possibly 2)
Specifications
Configuration:
​
 • UICCo'-Co'
Gauge5 ft 6 in (1,676 mm)
BogiesAlco High-Adhesion bogies
Wheel diameterNew: 1,029 mm (3 ft 5 in)
Half-worn: 1,055 mm (3 ft 5+1⁄2 in)
Full-worn: 1,016 mm (3 ft 4 in)
Wheelbase13,380 mm (43 ft 11 in)
Length19,880 mm (65 ft 3 in)
Width3,000 mm (9 ft 10 in)
Height4,100 mm (13 ft 5 in)
Axle load21.33 tonnes (20.99 long tons; 23.51 short tons)
Loco weight128 tonnes (126 long tons; 141 short tons)
Electric system/sTemplate:25 kV 50 Hz
Current pickup(s)Pantographs
Traction motors6 Hitachi HS15250A
Gear ratio16:65
MU working3
Loco brakeAir and Regenerative
Train brakesAir
Safety systemsTPWS (Train Protection and Warning System), Vacuum Control, Slip/Slide Control, Main Overload Relay, Motor Over Load Relay, No Volt Relay, Over Voltage Protection and Earth Fault Relay, Oil Pressure Governor
Performance figures
Maximum speed100 km/h (62 mph)
Power output5,000 hp (3,700 kW)
Tractive effortStarting: 300 kN (67,000 lbf)
Career
NumbersNo IR numbers
LocaleInside BHEL yard, Jhansi
DispositionStored

The Indian locomotive class WAG-8 was a class of 25 kV AC electric locomotives that was developed in the early 1990s by Bharat Heavy Electricals Limited (BHEL) for Indian Railways. The model name stands for broad gauge (W), AC current (A), freight/goods traffic (G), eighth-generation (8). Only two units of this class were built, both prototypes.

This class provided the basic design for a number of other locomotives like the WCAM-2, the WCAM-3 and the WCAG-1.

History[edit | edit source]

The history of WAG-8 begins in the early 1990s with the aim of addressing the shortcomings of the previous WAG-5 class and remove steam locomotives from IR by a target date of 1990. The WAG-5, although successful, had become underpowered to meet the growing demands of the Indian Railways. So in the early 1990s BHEL decided to look for a successor to the WAG-5 class. The required specification was of a 5000-horsepower locomotive.Template:Or inline

Initially, Indian Railways invited tenders to build locomotives to the new specification. The following responses were received:

  • CLW submitted their upgraded WAG-5 model with 5000 hp with Co-Co bogies.
  • BHEL submitted a 5000 hp locomotive with thyristors control and Co-Co bogies

Each company submitted their prototypes and Indian Railways designated these prototypes as the WAG-7 class and WAG-8 class respectively.[1] Development on the WAG-8 class in 1990 while BHEL was also manufacturing WAG-5HS. Technologically the BHEL WAG-8 was meant to be superior to the WAG-7 which was effectively using tap-changer technology from the 1960s. They most likely had the Hitachi HS15250A seen in present-day WCAM-3 and WCAG-1. The WAG-8 locomotives were to be handed over to Railways[which?] for trial in December, 1992, but the whole project was cancelled due to arrival of the WAG-9, and thyristors control had become obsolete in favour of 3-phase AC technology. The prototype locomotive was subsequently condemned and parked on an unused rail sliding at BHEL, Jhansi, where it remained as of 2017.[2][3]

See also[edit | edit source]

References[edit | edit source]

Notes[edit | edit source]

  1. ↑ "[IRFCA] Indian Railways FAQ: Locomotives - General Information - I". www.irfca.org. Retrieved 18 April 2020.
  2. ↑ Naphade, Ankit. "2906557-0: The only WAG-8 prototype of India, lying - Railway Enquiry". indiarailinfo.com. Retrieved 24 May 2020.
  3. ↑ "Diesel Locomotive Roster – The WAG Series". 24 Coaches. 30 October 2013. Retrieved 29 April 2020.

Bibliography[edit | edit source]

External links[edit | edit source]

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