WAP7 LOCOMOTIVE

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                                   WHAT IS WAP7 LOCOMOTIVE 

WAP7 HOWRAH (E.R)
History :- WAP 7 is a locomotive developed by Chittaranjan Locomotive Works by modifying the gear ratio of existing WAG 9 class. It is capable of hauling trains at speeds ranging between 110 to 140 kilometres per hour (68 to 87 mph) and is now largely used byNorthern Railways (NR), South Central Railways (SCR), Southern Railways (SR), Eastern Railways (ER), South East Central Railway (SECR), Central Railways (CR), Western Railway (WR), West Central Railways (WCR). As of August,2016 there are 288 locomotives in service. In this all the locomotives having AAR tightlock couplers, chain link couplers are fitted.

                                    - :Technical specification:-  

  • Power Type- Electric
  • Current Collection- pantograph
  • Power Output- 6350hp(max),6000hp(Continuous)
  • Traction Motors- 6FRA 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). *95% efficiency.}
  • Gear Ratio- 72:20
  • Wheel Diameter- 1,092 mm (43 in) new, 1,016 mm (40 in) worn
  • Length Over Buffers- 20,562 mm (67 ft 5 1⁄2 in)
  • Length Over Headstocks- 19,280 mm (63 ft 3 in)
  • Body Width- 3,152 mm (10 ft 4 1⁄8 in)
  • Loco Weight- 123 t (121 long tons; 136 short tons)
  • Cab Length- 2,434 mm (95 7⁄8 in)
  • Pantograph Locked Down Height- 4,255 mm (13 ft 11 1⁄2 in)



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