Indian locomotive class WAP-7: Difference between revisions
No edit summary |
No edit summary |
||
Line 18: | Line 18: | ||
| locale = [[Northern Railway (India)|Northern Railways]], [[South-Central Railway]][[Eastern Railway]] [[South East Central Railway]] |
| locale = [[Northern Railway (India)|Northern Railways]], [[South-Central Railway]][[Eastern Railway]] [[South East Central Railway]] |
||
}} |
}} |
||
'''WAP 7''' is a high speed [[locomotive]] indigenously developed by [[Chittaranjan Locomotive Works]]with colaboaration with [[ABB |
'''WAP 7''' is a high speed [[locomotive]] indigenously developed by [[Chittaranjan Locomotive Works]]with colaboaration with [[ABB Adtranz]]. It is capable of hauling trains at speeds ranging between 140 and 160 km per hour and is now largely used by [[Northern Railway (India)|Northern Railways]] (NR), [[South Central Railways]] (SCR),[[Southern Railway (India)|Southern Railways]] (SR), [[Eastern Railway zone|Eastern Railways]] (ER), [[South East Central Railway]] (SECR),[[Central Railways]] (CR), [[West Central Railways]] (WCR). |
||
== Similarity with WAG 9 == |
== Similarity with WAG 9 == |
Revision as of 11:44, 8 October 2013
WAP-7 | |||||||
---|---|---|---|---|---|---|---|
| |||||||
| |||||||
| |||||||
|
WAP 7 is a high speed locomotive indigenously developed by Chittaranjan Locomotive Workswith colaboaration with ABB Adtranz. It is capable of hauling trains at speeds ranging between 140 and 160 km per hour and is now largely used by Northern Railways (NR), South Central Railways (SCR),Southern Railways (SR), Eastern Railways (ER), South East Central Railway (SECR),Central Railways (CR), West Central Railways (WCR).
Similarity with WAG 9
The WAP-7 is actually a modified version of the WAG 9 freight locomotive with modified gear ratios and is set to replace the fleet of WAP 4's, the most widely used passenger locomotive today. The process will be a very slow one however, with WAP-4s still being produced and the production of WAP-7's increasing at a slow pace.
Performance
With a maximum speed rating of 180 km/h (IR restricts it to 160 km/hr), the WAP-7 has the highest acceleration figures while hauling mail/express trains. The WAP-7 can also haul loads of 24-26 passenger coaches (1430-1550t) at 110+ km/h per hour. It is also known to haul 16 heavyweight Air Conditioned coaches (1120t) in 1:40 inclines single-handedly. At a trial conducted by Indian Railways, it clocked a speed of 177 km/h. It is the most successful passenger locomotive in the Indian Railways portfolio after the WAP-4. It is used to haul premium trains like the Rajdhani Express and the Shatabdi Express apart from other regular mail/express trains.[1] It also regularly hauls other trains like the Hyderabad - New Delhi, H.Nizamuddin-Thiruvananthapuram, H.Nizamuddin-Chennai, H.Nizamuddin-Bangalore, New Delhi-Sealdah and the New Delhi - Mumbai Rajdhani Express and Nizamuddin-Ernakulam Duronto Express.
WAP-7 locomotive can deliver 6000 HP with regenerative braking being one of its salient features. The regenerative braking is deployed on down gradients conserving energy to the tune of 30-35 percent. It has an inbuilt microprocessor based fault diagnostic system to make trouble shooting easier.[2] Another feature of this locomotive is that it eliminates the need to have separate DG sets for air-conditioning in long distance trains hence providing significant amount of 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 "End on Generation" in which a Power Car equipped with diesel generator capable of generating adequate power of 3-phase 50-cycle 415V/750V AC (called as hotel load) is provided at either end of the train rake to supply power.[3][4][5]
A 24-coach (1500t) passenger rake can be accelerated to 110 km/h in 240 seconds (over 4.7 km) by a WAP-7; to 120 km/h in 304 sec. (6.7 km); and to 130 km/h in 394 sec. (9.9 km).
The locomotive has started running to/from the Mumbai area of Western Railway from February 2012 and is expected to be used in the Mumbai area of Central Railway by January 2013. 160 WAP-7 locomotives have been put to service as of June 2013.[citation needed]
Currently a 7000 hp version codenamed WAP 7-D with IGBT traction is under development by Chittaranjan Locomotive Works.
Technical specifications
Manufacturers | Chittaranjan Locomotive Works[6] |
Traction Motors | 6FRA 6068 3-phase squirrel-cage induction motors (850 kW, 2180V, 1283/2484 rpm, *270/310A; Weight- 2100 kg, forced-air ventilation, axle-hung, nose-suspended; Torque 6330/7140Nm. *95% efficiency.)[6] |
Gear Ratio | 72:20[6] |
Axle load | 20.5t[6] |
Power | 6350 HP[6] |
Wheel diameter | 1092mm new, 1016mm wor[6] n |
Wheelbase | 15700mm[6] |
Bogies | Co-Co, Fabricated Flexicoil Mark IV bogies; bogie wheelbase 18500mm + 18500mm[6] |
Unsprung mass per axle | 3.984t[6] |
Length over buffers | 20562mm[6] |
Length over headstocks | 19280mm[6] |
Body width | 3152mmn[6] |
loco weight | 123t[6] |
Cab length | 2434mm[6] |
Pantograph locked down height | 4255mm[6] |
Locations
The current locomotive sheds which house this locomotive are:
- Ghaziabad (Code:GZB)
- Lallaguda (Code:LGD)
- Ajni (Code:AJNI)
- Howrah (Code:HWH)
- Bhilai (Code:BIA)
- Royapuram (Code:RPM)
- Tuglakabad (Code:TKD)
Trains hauled by WAP-7
- Chennai Central - Trivandrum Superfast Mail(12623) (RPM WAP 7)
- Chennai - Alappuzha express (16041) hauled by WAP 7 (Royapuram)
- Alappuzha - Chennai express (16042) hauled by WAP 7 (Royapuram)
- Chennai Central - Coimbatore - Chennai Central Duronto express (Train 12243 / 12244) (WAP-7)
- Kerala Sampark Kranti Express (Ghaziabad WAP-7)
- Kochuveli Amritsar S/F Express (Ghaziabad WAP-7)
- Dadar Amritsar Express (Ghaziabad WAP-7)
- Howrah Rajdhani Express (Ghaziabad WAP-7)
- Sealdah Rajdhani Express (Ghaziabad WAP-7)
- Chennai Rajdhani Express (Ghaziabad / Lallaguda WAP-7)
- Thiruvananthapuram Rajdhani Express(Ghaziabad WAP-7)
- Bangalore Rajdhani Express (Lallaguda WAP-7)
- Secunderabad Rajdhani Express (Lallaguda WAP-7)
- Bilaspur Rajdhani Express (Ajni WAP-7)
- Ranchi Rajdhani Express (Ghaziabad WAP-7)
- Sealdah - New Delhi Duronto Express (Ghaziabad WAP-7)
- Secunderabad Hazrat Nizamuddin Duronto Express (Lallaguda WAP-7)
- Hazrat Nizamuddin - Ernakulam Duronto Express (Ghaziabad WAP-7)
- Hazrat Nizamuddin - Chennai Duronto Express (Ghaziabad/Lallaguda WAP-7)
- Hazrat Nizamuddin - Pune Duronto Express (Ghaziabad WAP-7)
- Bandra Terminus Hazrat Nizamuddin Yuva Express (Ghaziabad WAP-7)
- Delhi Sarai Rohilla - Yesvantpur Duronto Express(Ghaziabad / Lallaguda WAP-7)
- Howrah - New Delhi Yuva Express (Ghaziabad WAP-7)
- Hazrat Nizamuddin - Chennai Garib Rath Express (Ghaziabad WAP-7)
- New Delhi - Allahabad Duronto Express (Ghaziabad WAP-7)
- Himalayan Queen Express (Ghaziabad WAP-7)
- Hyderabad - New Delhi Andhra Pradesh Express (Lallaguda WAP-7)
- Hyderabad - Hazrat Nizamuddin Dakshin Express (Lallaguda WAP-7)
- Hyderabad - Chennai Charminar Express (Lallaguda WAP-7)
- Secunderabad - Visakhapatnam AC Duronto Express (Lallaguda WAP-7)
- Hyderabad - Visakhapatnam Godavari Express (Lallaguda WAP-7)
- Secunderabad - Visakhapatnam GaribRath Express (Lallaguda WAP-7)
- Secunderabad - Vijayawada Satavahana SF Express (Lallaguda WAP-7)
- Secunderabad - Kakinada Gowthami SF Express (Lallaguda WAP-7)
- Secunderabad - Sirpur Kaghaznagar Telangana Express (Lallaguda WAP-7)
- Vijayawada - Visakhapatnam Ratnachal SF Express (Lallaguda WAP-7)
- Adilabad - Tirupati Krishna Express (Lallaguda WAP-7)
- Tirupati - Hazrat Nizamuddin AP Sampak Kranti SF Express (Lallaguda WAP-7)
- Bihar Sampark Kranti Superfast Express (Darbhanga - New Delhi) (Ghaziabad WAP-7)
- Taj Express (Ghaziabad WAP-7)
- Chattisgarh Express (Ajni WAP-7)
- Amarkantak Super Fast Express (Ghaziabad WAP-7)
- Sewagram Express (Ajni WAP-7)
- Goa Express (Ghaziabad WAP-7)
- Shan-e-Bhopal Express (Tuglakabad WAP-7)
- Agra - Jhansi Passenger (Ghaziabad WAP-7)
- Chennai Bangalore Mail (Lallaguda WAP-7)
- Chennai Bangalore Express (Lallaguda WAP-7)
- Chennai Bangalore Brindavan Express (Lallaguda WAP-7)
- Chennai Bangalore Shatabdi Express (Lallaguda WAP-7)
- Coalfield Express (Howrah WAP-7)
- Hazrat Nizamuddin - Patna Garib Rath Express( Ghaziabad WAP-7)
- Kalka Mail (Howrah WAP-7)
- Howrah - Dhanbad Double Decker Express (Howrah WAP 7)
- Paschim Express ( Ghaziabad WAP-7)
- Indore - Hazrat Nizamuddin Intercity Express ( Tuglakabad WAP-7)
- Pune Nagpur Garib Rath Express (Ajni WAP-7)
- Nagpur-Pune Superfast (Ajni WAP-7)
- Nagpur Duronto express (Ajni WAP-7)
- New-Delhi Prayag Raj Express (GZB WAP-7)
- Tirupati-Secunderabad padmavati express (Lallaguda WAP-7)
- Howrah New Delhi Poorva Express(GZB WAP 7)
- Habibganj - Indore - Habibganj Double Decker Express (Tuglakabad WAP 7)
- Bhopal - Indore - Bhopal Double Decker Express (Tuglakabad WAP 7)
- Chhattisgarh Sampark Kranti Superfast Express
Accidents and incidents
Kalka Mail which derailed on 10 July 2011 was being hauled by a WAP-7 locomotive.[7]
Malfunction of the undergear of the locomotive could also be a reason. The driver of the Kalka Mail said he saw the engine shaking. [8]
A post-accident diagnostic revealed that the first axle (leading) of the locomotive registered a jerk and the fourth axle (trailing bogie) showed loss of contact of the wheel with the track.
The locomotive in question (30221) has been re-railed and is undergoing fault diagnostics and repairs.
See also
References
- ^ "New energy-efficient loco introduced for high speed train". Economic Times. 09-Feb-2012. Retrieved 25-Aug-2012.
{{cite web}}
: Check date values in:|accessdate=
and|date=
(help); Italic or bold markup not allowed in:|publisher=
(help) - ^ "Southern Railway inducts fast locomotive". The Hindu. 18-Oct-2012.
{{cite web}}
: Check date values in:|date=
(help); Italic or bold markup not allowed in:|publisher=
(help) - ^ "Train had WAP-7 engine, 'black box' may reveal cause". Zee News. 09-Aug-2010. Retrieved 25-Aug-2012.
{{cite web}}
: Check date values in:|accessdate=
and|date=
(help); Italic or bold markup not allowed in:|publisher=
(help) - ^ "Recent Developments". Chittaranjan Loco works. Retrieved 25-Aug-2012.
{{cite web}}
: Check date values in:|accessdate=
(help); Italic or bold markup not allowed in:|publisher=
(help) - ^ "Development of Electric locomotive with Head On Generation (HOG) facility" (PDF). Indian Railways.
{{cite web}}
: Italic or bold markup not allowed in:|publisher=
(help) - ^ a b c d e f g h i j k l m n o "Recent Developments". IRFCA.
{{cite web}}
: Italic or bold markup not allowed in:|publisher=
(help) - ^ "Train had WAP-7 engine, 'black box' may reveal cause". The Indian express. 12 July 2011. Retrieved 14 July 2011.
- ^ "Engine failure behind Kalka Mail tragedy". IBN Live. 13 July 2011. Retrieved 14 July 2011.