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WAP 7 LOCO FULL DETAILS ⬇️⬇️⬇️⬇️ here
The Indian locomotive class WAP-7 is a class of 25 kV AC electric locomotives that was developed in 1999 by Chittaranjan Locomotive Works (CLW) for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Passenger traffic (P) engine, 7th generation (7). They entered service in 2000. A total of 1407 WAP-7 have been built, with more units being built at CLW, Banaras Locomotive Works (BLW) and Diesel-Loco Modernisation Works (DLMW).

Power type
ElectricBuilderChittaranjan Locomotive Works,
Banaras Locomotive Works,
Diesel-Loco Modernisation
WorksBuild date10 May 2000 - present
Total produced1407 as of October 2021
SpecificationsGauge5 ft 6 in (1,676 mm)BogiesCo-Co,
Fabricated Flexicoil Mark IV bogies; bogie wheelbase 1,850 mm (72+7⁄8 in) + 1,850 mm (72+7⁄8 in)
Wheel diameter1,092 mm (43 in) new, 1,016 mm (40 in) worn
Wheelbase15,700 mm (51 ft 6+1⁄8 in)
Length:
​ • Over beams20,562 mm (67 ft 5+1⁄2 in)Width3,152 mm (10 ft 4+1⁄8 in)
Height:
​ • Pantograph4,255 mm (13 ft 11+1⁄2 in)
Axle loadWAP 7

20.5 t (20.2 long tons; 22.6 short tons)

WAP 7HS

18.08 t (17.79 long tons; 19.93 short tons)
Loco weight123 t (121 long tons; 136
short tons)
Power supply3-phase 2180 V 50 HzElectric system/s25 kV 50 Hz AC OverheadCurrent pickup(s)
PantographTraction motors6FRA 6068 3-phase squirrel-cage induction motors
850 kW (1,140 hp), 2180 V, 1283/2484 rpm, 270/310A;
Weight-2,100 kg (4,600 lb),
forced-air ventilation,
axle-hung, nose-suspended;
Torque 6,330–7,140 N⋅m (4,670–5,270 lbf⋅ft)
~88% efficiency.
TransmissionElectricGear ratioWAP 7
72:20
WAP 7HS
70:22
Loco brakeAir and regenerativeTrain brakesAirPerformance figures
Maximum speed140 km/h (87 mph)
Power outputContinuous : 6,350 hp (4,740 kW)
Tractive effortStarting : 322.4 kN (72,500 lbf)
Continuous : 228 kN (51,000 lbf) at 71 km/hCareerOperators
Indian RailwaysNumbers30201+ CLW

37001+ BLW

39000+ DLMWLocaleIndiaFirst run19 May 2000

The WAP-7 is one of the most successful locomotives of Indian Railways serving passenger trains for over 21 years. It is a passenger variant of the WAG-9 freight locomotive with a modified gear ratio to pull lighter loads at higher speeds. It is the second most powerful passenger locomotive in the Indian Railways fleet (as of 2021), after the newly-Alstom developed WAG 12B locomomtive. WAP-7 is capable of hauling 24 coach trains at speeds 110–140 km/h (68–87 mph).

HEAD OF GENERATION (HOG)⬇️⬇️⬇️⬇️
A main feature of some locomotives of this class is that they eliminate the need to have separate End on Generation (EOG) sets or DG (Diesel Generator) sets for supplying power to the train resulting in significant 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 EOG where a power car equipped with diesel generator capable of generating adequate power of 3-phase 50 Hz 415 V / 750 V AC (called 'head-end power') is provided at either end of the train rake to supply power.[2][3][4]...

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