| WAP-7 | |
| Powertype: | Electric |
| Builder: | |
| Builddate: | 1999-2023 (CLW) 2016-present (BLW) 2017-present (PLW) |
| Totalproduction: | 1780 as of November 2024 |
| Bogies: | Co-Co, Fabricated Flexicoil Mark IV bogies; bogie wheelbase 1850abbr=onNaNabbr=on + 1850abbr=onNaNabbr=on |
| Wheeldiameter: | 1092abbr=onNaNabbr=on new, 1016abbr=onNaNabbr=on worn |
| Wheelbase: | 15700abbr=onNaNabbr=on |
| Over Bufferbeams: | 20562abbr=onNaNabbr=on |
| Width: | 3152abbr=onNaNabbr=on |
| Height: | 5235abbr=onNaNabbr=on |
| Length: | 20.62abbr=onNaNabbr=on |
| Pantodown: | 4255abbr=onNaNabbr=on |
| Axleload: | WAP 7 20.5t[1] WAP 7HS18.08t[2] |
| Locoweight: | 123t[3] |
| Powersupply: | 3-phase 2180 V 50 Hz |
| Electricsystem: | 25 kV 50 Hz AC Overhead |
| Collectionmethod: | Pantograph |
| Tractionmotors: | 6FRA 6068 3-phase squirrel-cage induction motors 850kW, 2180 V, 1283/2484 rpm, 270/310A; Weight-2100kg (4,600lb), forced-air ventilation, axle-hung, nose-suspended; Torque 6330Nm7140Nm ~88% efficiency. |
| Transmission: | Electric |
| Gear Ratio: | WAP 7 72:20 WAP 7HS 70:22 |
| Locobrakes: | Air and regenerative |
| Trainbrakes: | Air |
| Maxspeed: | 140km/h (WAP-7) 160km/h (WAP-7HS) Potential speed: 180km/h(WAP-7HS)155km/h (WAP-7) |
| Poweroutput: | Max Power : 6350HP Continuous: 61202NaN2 |
| Tractiveeffort: | Starting : 322.4kN Continuous : 228kN at 71 km/h |
| Operator: | Indian Railways |
| Fleetnumbers: | |
| Firstrundate: | 19 May 2000 |
| Locale: | All over India |
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) locomotive, 7th generation (7). They entered service in 2000. A total of 1683 WAP-7 have been built, with more units being built at CLW, Banaras Locomotive Works (BLW) and Patiala Locomotive Works (PLW).
The WAP-7 is the most successful locomotives of Indian Railways serving passenger trains since its introduction in 1999. It is a passenger variant of the WAG-9 freight locomotive with a modified gear ratio to pull lighter loads at higher speeds. With an output of 6,125 hp, it is the most powerful passenger locomotive in the Indian Railways fleet, and the most numerous passenger locomotive in India. The WAP-7 is capable of hauling 24 coach trains at speeds 110km/h140km/h.
It is now largely used by Northern Railways (NR), South Central Railways (SCR), Central Railways (CR), South East Central Railways (SECR), South Eastern Railways (SER), West Central Railways (WCR), Eastern Railways (ER), Western Railways (WR), North Central Railways (NCR), South Western Railways (SWR), Southern Railways (SR), East Central Railways (ECR), East Coast Railways (ECoR), North Eastern Railways (NER), North Western Railways (NWR), Northeast Frontier Railways (NFR)among other zones. As of October 2021, all of these are fitted with H-type transition couplers which are compatible with both screw coupling and centre-buffer coupling. In February 2017, Banaras Locomotive Works built their first WAP 7 class locomotive.[4]
In 2019, a variant of the WAP-7, designated the WAP-7HS, was introduced for higher speeds. The WAP-7HS has a max speed of 180km/h, and is capable of hauling a 24-car train at 160km/h as opposed to the 140km/h of the original. Indian Railways plans to use the WAP-7HS for Shatabdi, Rajdhani, and Duronto express trains. However, as of September 2022, it has not been confirmed if any others have been built, and the single completed WAP-7HS has stayed restricted to 130km/h.
A main feature of Majority 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.[5] [6] [7]
| Name | Shed Code | Quantity | Introduction Year | ||
|---|---|---|---|---|---|
| HOG | Non HOG | ||||
| AQE | 65 | 4 | 2010 | ||
| Kalyan | KYNE | 70 | 4 | 2019 | |
| Pune | PADX | 42 | 2023 | ||
| HWHE | 89 | 2012 | |||
| Sealdah | SDAD | 21 | 9 | 2020 | |
| GMOE | 46 | 2000 | |||
| Barauni | BJUE | 6 | 2021 | ||
| Samastipur | SPJD | 51 | 2022 | ||
| East Coast Railway | WATE | 82 | 2016 | ||
| GZBE | 110 | 27 | 2000 | ||
| LDHE | 44 | 2022 | |||
| North Central Railway | Kanpur | CNBE | 87 | 2019 | |
| North Eastern Railway | Gonda | GDDX | 17 | 2021 | |
| Gorakhpur | GKPL | 13 | 2024 | ||
| Northeast Frontier Railway | Siliguri | SGUD | 10 | 2024 | |
| North Western Railway | Bhagat Ki Kothi | BGKD | 37 | 2023 | |
| EDE | 76 | 2017 | |||
| RPME | 109 | 5 | 2011 | ||
| LGDE | 139 | 16 | 2008 | ||
| Vijayawada | BZAE | 70 | 2021 | ||
| South Eastern Railway | Tatanagar | TATE | 62 | 2017 | |
| Bondamunda | BNDL | 16 | 2018 | ||
| Santragachi | SRCE | 22 | 2017 | ||
| BIAE | 13 | 2012 | |||
| Krishnarajapuram | KJMD | 62 | 2019 | ||
| Hubli | UBLD | 11 | 2024 | ||
| BRCE | 127 | 2016 | |||
| Valsad | BLEE | 45 | 2024 | ||
| TKDE | 74 | 10 | 2013 | ||
| Itarsi | ETE | 89 | 2018 | ||
| Total | 1703 | 77 | |||
| Total Locomotives Active as of November 2024[8] | 1780 | ||||