What is better, WAP5 OR WAP7?
Indian locomotive class
WAP-7
Top speed Test Run:177 km/h (110 mph), Operational:
130 km/h (81 mph)
Power output
6,350 hp (4,735 kW)
Gear Ratio 72:20
Axle load 20.5t
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.)
With a maximum speed rating of 180 km/h (IR restricts it to 130 km/hr), the WAP-7 boasts of the
most phenomenal 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.
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). Around 100 of these locomotives have been put to service as of early 2012.
Currently a
6000 hp version with
IGBT traction is under development by Chittaranjan Locomotive Works.
The locomotive has started running to/from the
Mumbai area of Western Railway from february 2012 
and is exprected to be used in the Mumbai area of Central Railway by January 2013.
Indian locomotive class
WAP-5
Axle load 19.5 tonnes (19.2 long tons; 21.5 short tons)
Locomotive weight 78 tonnes (77 long tons; 86 short tons)
Top speed Service:
162 km/h (101 mph)
Test Runs: 184 km/h (114 mph)
Potential:
225 km/h (140 mph)
Power output
5,450 hp (4,064 kW),4 MW (4000 kW, 5450 hp)
Tractive effort 258 kN (58,000 lbf)
regenerative braking (160 kN)
WAP-5 travels at
150 km/h (93 mph) in the New Delhi - Agra Cantt section.
Around 50 of these locomotives have been put to service as of January 2012.
Traction Motors ABB's 6FXA 7059 3-phase squirrel cage induction motors (1150 kW, 2180V, 370/450A, *1583/3147 rpm) Weight 2050 kg. Forced-air ventilation, fully suspended. Torque 6930/10000 Nm. 96% *efficiency.
Gear Ratio 67:35:17. (3-stage gears)
Transformer ABB's LOT-7500. 7475kVA primary, 4x1450kVA secondary.
Power Drive Power converter from ABB, type UW-2423-2810 with SG 3000G X H24 GTO thyristors (D *921S45 T diodes), 14 thyristors per unit (two units). Line converter rated at 2 x 1269 V @ 50 Hz, *with DC link voltage of 2180 V. Drive converter rated at 2180 V phase to phase, 953 A output current *per phase, motor frequency from 0 to 160 Hz.
From above data you can understand that WAP 5 has less power but sustained highest speed in heavy weight category. WAP7 has advantage in highest acceleration rate so it clears the tracks much faster than others.
