India's Fastest Locomotive WAP-7
India's
fastest locomotive WAP-7 speeding upto 140km/h,6125hp max. power;
6000hp continuous at wheel rim. At 123t, it is much heavier than the 78t
WAP-5. Intended to haul heavier, 26-coach passenger trains and
passenger/parcel mixed trains.
Initial models were rated at
6125hp total power and 33000 kgf (323kN) tractive effort. Modifications
during continuing trials resulted in improved performance with the loco
now yielding 6350hp total power and 36000 kgf (352.8kN) tractive effort.
In the trial runs,the upgraded WAP-7 #30203 was shown able to take a
24-coach train to 110km/h in just 235 to 245 seconds (compare: 324
seconds for a WAP-5). Braking systems as in the WAP-5, with regenerative
braking rated at 183kN in the first units and 260kN in the later ones.
Earlier trials with WAP-7 locos had yielded times around 390 seconds
for the same test, which had cast doubts on the future of this loco
class which was designed to perform better than the WAP-5.
After some trials with the Prayagraj Exp. in early 2002, now the WAP-7
is being used to haul the 24-coach rake of ER's Poorva Exp. and will
presumably soon be used for other trains as well. Max. tested speed is
160km/h, rated for 140km/h.
Better performing variants of the
WAP-7 have been under development changes are said to include higher
capacity components (including the main transformer) to allow stall-free
running on 1:100 gradients, and a higher tractive effort of 42000 kgf
(411kN). Some of the units starting around #30212 are also thought to
have some enhancements in comparison to the very first ones. [11/04]
Other plans by CLW for this loco class are said to include the provision
of IGBT control, greater automation of some control tasks, and in-cab
signalling. MU operation possible with a maximum of two locos.
The WAP-7 appears to have returned to the older (WAM, earlier WAP) style
of pantograph with a single collector bar instead of the double
collector bar used for the WAG-9.
Manufacturers: CLW
Traction Motors: 6FRA 6068 3-phase squirrel-cage induction motors
(850kW, 2180V, 1283/2484 rpm, 270/310A. Weight 2100kg, forced-air
ventilation, axle-hung, nose-suspended. Torque 6330/7140Nm. 95%
efficiency.)
Gear Ratio: 72:20
Axle load: 20.5t
Wheel diameter: 1092mm new, 1016mm worn
Wheel base: 15700mm
Bogies: Co-Co, ABB bogies; bogie wheel base 1850mm + 1850mm
Unsprung mass per axle: 3.984t
Length over buffers: 20562mm
Length over headstocks: 19280mm
Body width: 3152mmn
Cab length: 2434mm
Pantograph locked down height: 4525mm
Tractive Effort: 36.0t
A 24-coach (1430t) passenger rake can be accelerated to 110km/h in 240
seconds (over 4.7km) by a WAP-7; to 120km/h in 304 sec. (6.7km); and to
130km/h in 394 sec. (9.9km).
India's Fastest Locomotive WAP-7
India's
fastest locomotive WAP-7 speeding upto 140km/h,6125hp max. power;
6000hp continuous at wheel rim. At 123t, it is much heavier than the 78t
WAP-5. Intended to haul heavier, 26-coach passenger trains and
passenger/parcel mixed trains.
Initial models were rated at 6125hp total power and 33000 kgf (323kN) tractive effort. Modifications during continuing trials resulted in improved performance with the loco now yielding 6350hp total power and 36000 kgf (352.8kN) tractive effort. In the trial runs,the upgraded WAP-7 #30203 was shown able to take a 24-coach train to 110km/h in just 235 to 245 seconds (compare: 324 seconds for a WAP-5). Braking systems as in the WAP-5, with regenerative braking rated at 183kN in the first units and 260kN in the later ones.
Earlier trials with WAP-7 locos had yielded times around 390 seconds for the same test, which had cast doubts on the future of this loco class which was designed to perform better than the WAP-5. After some trials with the Prayagraj Exp. in early 2002, now the WAP-7 is being used to haul the 24-coach rake of ER's Poorva Exp. and will presumably soon be used for other trains as well. Max. tested speed is 160km/h, rated for 140km/h.
Better performing variants of the WAP-7 have been under development changes are said to include higher capacity components (including the main transformer) to allow stall-free running on 1:100 gradients, and a higher tractive effort of 42000 kgf (411kN). Some of the units starting around #30212 are also thought to have some enhancements in comparison to the very first ones. [11/04] Other plans by CLW for this loco class are said to include the provision of IGBT control, greater automation of some control tasks, and in-cab signalling. MU operation possible with a maximum of two locos.
The WAP-7 appears to have returned to the older (WAM, earlier WAP) style of pantograph with a single collector bar instead of the double collector bar used for the WAG-9.
Manufacturers: CLW
Traction Motors: 6FRA 6068 3-phase squirrel-cage induction motors (850kW, 2180V, 1283/2484 rpm, 270/310A. Weight 2100kg, forced-air ventilation, axle-hung, nose-suspended. Torque 6330/7140Nm. 95% efficiency.)
Gear Ratio: 72:20
Axle load: 20.5t
Wheel diameter: 1092mm new, 1016mm worn
Wheel base: 15700mm
Bogies: Co-Co, ABB bogies; bogie wheel base 1850mm + 1850mm
Unsprung mass per axle: 3.984t
Length over buffers: 20562mm
Length over headstocks: 19280mm
Body width: 3152mmn
Cab length: 2434mm
Pantograph locked down height: 4525mm
Tractive Effort: 36.0t
A 24-coach (1430t) passenger rake can be accelerated to 110km/h in 240 seconds (over 4.7km) by a WAP-7; to 120km/h in 304 sec. (6.7km); and to 130km/h in 394 sec. (9.9km).
Initial models were rated at 6125hp total power and 33000 kgf (323kN) tractive effort. Modifications during continuing trials resulted in improved performance with the loco now yielding 6350hp total power and 36000 kgf (352.8kN) tractive effort. In the trial runs,the upgraded WAP-7 #30203 was shown able to take a 24-coach train to 110km/h in just 235 to 245 seconds (compare: 324 seconds for a WAP-5). Braking systems as in the WAP-5, with regenerative braking rated at 183kN in the first units and 260kN in the later ones.
Earlier trials with WAP-7 locos had yielded times around 390 seconds for the same test, which had cast doubts on the future of this loco class which was designed to perform better than the WAP-5. After some trials with the Prayagraj Exp. in early 2002, now the WAP-7 is being used to haul the 24-coach rake of ER's Poorva Exp. and will presumably soon be used for other trains as well. Max. tested speed is 160km/h, rated for 140km/h.
Better performing variants of the WAP-7 have been under development changes are said to include higher capacity components (including the main transformer) to allow stall-free running on 1:100 gradients, and a higher tractive effort of 42000 kgf (411kN). Some of the units starting around #30212 are also thought to have some enhancements in comparison to the very first ones. [11/04] Other plans by CLW for this loco class are said to include the provision of IGBT control, greater automation of some control tasks, and in-cab signalling. MU operation possible with a maximum of two locos.
The WAP-7 appears to have returned to the older (WAM, earlier WAP) style of pantograph with a single collector bar instead of the double collector bar used for the WAG-9.
Manufacturers: CLW
Traction Motors: 6FRA 6068 3-phase squirrel-cage induction motors (850kW, 2180V, 1283/2484 rpm, 270/310A. Weight 2100kg, forced-air ventilation, axle-hung, nose-suspended. Torque 6330/7140Nm. 95% efficiency.)
Gear Ratio: 72:20
Axle load: 20.5t
Wheel diameter: 1092mm new, 1016mm worn
Wheel base: 15700mm
Bogies: Co-Co, ABB bogies; bogie wheel base 1850mm + 1850mm
Unsprung mass per axle: 3.984t
Length over buffers: 20562mm
Length over headstocks: 19280mm
Body width: 3152mmn
Cab length: 2434mm
Pantograph locked down height: 4525mm
Tractive Effort: 36.0t
A 24-coach (1430t) passenger rake can be accelerated to 110km/h in 240 seconds (over 4.7km) by a WAP-7; to 120km/h in 304 sec. (6.7km); and to 130km/h in 394 sec. (9.9km).
![India's fastest locomotive WAP-7 speeding upto 140km/h,6125hp max. power; 6000hp continuous at wheel rim. At 123t, it is much heavier than the 78t WAP-5. Intended to haul heavier, 26-coach passenger trains and passenger/parcel mixed trains.
Initial models were rated at 6125hp total power and 33000 kgf (323kN) tractive effort. Modifications during continuing trials resulted in improved performance with the loco now yielding 6350hp total power and 36000 kgf (352.8kN) tractive effort. In the trial runs,the upgraded WAP-7 #30203 was shown able to take a 24-coach train to 110km/h in just 235 to 245 seconds (compare: 324 seconds for a WAP-5). Braking systems as in the WAP-5, with regenerative braking rated at 183kN in the first units and 260kN in the later ones.
Earlier trials with WAP-7 locos had yielded times around 390 seconds for the same test, which had cast doubts on the future of this loco class which was designed to perform better than the WAP-5. After some trials with the Prayagraj Exp. in early 2002, now the WAP-7 is being used to haul the 24-coach rake of ER's Poorva Exp. and will presumably soon be used for other trains as well. Max. tested speed is 160km/h, rated for 140km/h.
Better performing variants of the WAP-7 have been under development changes are said to include higher capacity components (including the main transformer) to allow stall-free running on 1:100 gradients, and a higher tractive effort of 42000 kgf (411kN). Some of the units starting around #30212 are also thought to have some enhancements in comparison to the very first ones. [11/04] Other plans by CLW for this loco class are said to include the provision of IGBT control, greater automation of some control tasks, and in-cab signalling. MU operation possible with a maximum of two locos.
The WAP-7 appears to have returned to the older (WAM, earlier WAP) style of pantograph with a single collector bar instead of the double collector bar used for the WAG-9.
Manufacturers: CLW
Traction Motors: 6FRA 6068 3-phase squirrel-cage induction motors (850kW, 2180V, 1283/2484 rpm, 270/310A. Weight 2100kg, forced-air ventilation, axle-hung, nose-suspended. Torque 6330/7140Nm. 95% efficiency.)
Gear Ratio: 72:20
Axle load: 20.5t
Wheel diameter: 1092mm new, 1016mm worn
Wheel base: 15700mm
Bogies: Co-Co, ABB bogies; bogie wheel base 1850mm + 1850mm
Unsprung mass per axle: 3.984t
Length over buffers: 20562mm
Length over headstocks: 19280mm
Body width: 3152mmn
Cab length: 2434mm
Pantograph locked down height: 4525mm
Tractive Effort: 36.0t
A 24-coach (1430t) passenger rake can be accelerated to 110km/h in 240 seconds (over 4.7km) by a WAP-7; to 120km/h in 304 sec. (6.7km); and to 130km/h in 394 sec. (9.9km).](https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn2/p240x240/1170858_202805799886916_1965512618_n.jpg)
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