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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 by Northern 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), East Coast Railway (ECOR). As of August,2016 there are 288 locomotives in service. In this all the locomotives having AAR tightlock couplers, chain link couplers are fitted.
The WAP-7 locomotive is a WAG 9 freight locomotive with modified gear ratios and is set to replace the fleet of WAP 4s, the most widely used passenger locomotive today.These types of engines are mostly used by Indian Railways.
With a maximum speed rating of 140 km/h (87 mph), the WAP-7 has the highest acceleration figures while hauling mail/express trains. The WAP-7 can also haul loads of 24-26 passenger coaches (1,430–1,550 t or 1,410–1,530 long tons or 1,580–1,710 short tons at 130 km/h or 81 mph). It is the most successful passenger locomotive on the Indian Railways roster after the WAP-4. It is used to haul premium trains like the Rajdhani Express and the Shatabdi Express apart from other regular mail/express trains. It also regularly hauls other trains like the Hyderabad - New Delhi, H.Nizamuddin-Thiruvananthapuram, H.Nizamuddin-Chennai, H.Nizamuddin-Bangalore, New Delhi-Sealdah and the New Delhi - Mumbai Rajdhani Express, New Delhi- Rajendra Nagar(Patna) Patna Rajdhani Express and Nizamuddin-Ernakulam Duronto Express, Thiruvananthapuram-Chennai Super-fast Mail.
WAP-7 locomotive can deliver 6,350 hp (4,740 kW)max, with regenerative braking being one of its salient features. The regenerative braking is deployed on down gradients conserving energy to the tune of 30-35 percent. It has an inbuilt microprocessor based fault diagnostic system to make trouble shooting easier. Another feature of this locomotive is that it eliminates the need to have separate EOG sets for air-conditioning in long distance trains hence providing significant amount of 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 "End on Generation" in which a Power Car equipped with diesel generator capable of generating adequate power of 3-phase 50 Hz 415 V / 750 V AC (called 'hotel load') is provided at either end of the train rake to supply power.
The current locomotive sheds which house this locomotive are:
- Ghaziabad/GZB (Zone:NR)
- Lallaguda/LGD (Zone:SCR)
- Royapuram/RPM (Zone:SR)
- Tughlakabad/TKD (Zone:WCR)
- Ajni/AQ (Zone:CR)
- Howrah/HWH (Zone:ER)
- Bhilai/BIA (Zone:SECR)
- Vadodara/BRC (Zone:WR)
- Visakhapatnam/VSKP (Zone:ECoR)
WAP-7 30201 Navkiran
WAP-7 30202 Navbharti
WAP-7 30209 Navchetak
WAP-7 30215 Navgati
WAP-7 30479 Thangam
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Pune Nagpur Express (Ajni WAP-7)
Howrah Rajdhani Express (Howrah WAP-7)
Mahamana Express(Ghaziabad WAP-7)
Dibrugarh Rajdhani Express(Ghaziabad WAP-7)
Bhubaneswar Rajdhani Express (22823/22824 and 22811/22812) (Ghaziabad WAP-7)
Secunderabad Rajdhani Express (Lallaguda WAP-7)
Secunderabad Hazrat Nizamuddin Duronto Express (Lallaguda WAP-7)
Hyderabad - New Delhi Telangana Express (Lallaguda WAP-7)
Hyderabad - Hazrat Nizamuddin Dakshin Express (Lallaguda WAP-7)
Currently as of September 2016 only Mumbai Rajdhani, August Kranti Rajdhani, Howrah Rajdhani Express, Sealdah Rajdhani, Kalka Shatabdi and Jammu Rajdhani are getting regular HOG equipped WAP-7s.
Secunderabad Visakhapatnam Duronto Express (Lallaguda WAP-7)
Hyderabad - Visakhapatnam Godavari Express (Lallaguda WAP-7)
Secunderabad Vishakhapatnam Garib Rath Express (Lallaguda WAP-7)
Secunderabad - Vijayawada Satavahana Express (Lallaguda WAP-7)
Secunderabad - Kakinada Gowthami Express (Lallaguda WAP-7)
Secunderabad - Sirpur Kaghaznagar Kaghaznagar Express (Lallaguda WAP-7)
Chennai Egmore - Puducherry Passenger (Train 56037 / 56038) (Royapuram WAP-7)
Chennai Egmore - Tiruchchirappalli Rockfort Express (16177 / 16178) (Royapuram WAP-7)
Chennai Egmore - Karaikkudi Pallavan Express (Train 12605 / 12606) (Royapuram WAP-7)
Chennai Egmore - Madurai Vaigai Express (Train 12635 / 12636) (Royapuram WAP-7)
Chennai Egmore - Madurai Pandian Express (Train 12637 / 12638) (Royapuram WAP-7)
Chennai Egmore - Tirunelveli Nellai Express (Train 12631 / 12632) (Royapuram WAP-7)
Chennai Egmore - Guruvayur Guruvayur Express (Train 16127 / 16128) (Royapuram WAP-7)
Chennai Central - Jolarpettai Yelagiri Express (Train 16089/16070) (Royapuram WAP 7)
Chennai Central - Coimbatore Shatabdi Express (Train 12243/12244) (Royapuram WAP-7)
Chennai Central - Coimbatore Intercity Express (Train 12679 / 12680) (Royapuram WAP-7)
Chennai Central - Coimbatore Kovai Express (Train 12675 / 12676) (Royapuram WAP-7)
Chennai Central - Metupalaiyam Nilgiri Express (Train 12671/12672) (Royapuram WAP-7)
Chennai Central - Alappuzha Alleppey Express (22639/22640) (Royapuram WAP 7)
Chennai Central - Trivandrum Thiruvananthapuram Mail (12623/12624) (Royapuram WAP 7)
Chennai Central - Trivandrum Superfast Express (12696/12695) (Royapuram WAP 7)
Chennai Central - Bangalore Shatabdi Express (12027/12028) (Lallaguda/Royapuram WAP-7)
Chennai Central - Bangalore AC Double Decker Express (22625/22626) (Royapuram/Lallaguda WAP - 7)
Chennai Central - Bangalore Mail (12657/12658) (Royapuram WAP - 7)
Chennai Central - Bangalore Brindavan Express (12639/12640) (Lallaguda WAP-7)
Chennai Central - Bangalore (12607/12608) (Royapuram/Lallaguda WAP - 7)
Chennai Central - Bangalore (12609/12610) (Royapuram/Lallaguda WAP - 7)
Chennai Central - Hazrat Nizamuddin Duronto Express (12269/12270) WAP-7 Royapuram
Chennai Central - Hazrat Nizamuddin Chennai Rajdhani Express (12433/12434) (Ghaziabad / Lallaguda /RoyapuramWAP-7)
Chennai Central - New Delhi Grand Trunk Express (12615/12616) WAP 7 (Royapuram)
Chennai Central - New Delhi Tamil Nadu Express (12621/12622) WAP 7 (Royapuram)
Chennai Central - Hyderabad Charminar Express (LallagudaRoyapuram WAP-7)
Chennai Central - Ahmedabad Navjivan Express (12655/12656) (Royapuram (RPM) WAP 7)
Chennai Central - Howrah Mail (Royapuram WAP-7)
Tiruchirappalli - Tirunelveli SF Intercity Express (Train 22627 / 22628) (Royapuram WAP-7)
Durg - Nizamuddin Chhattisgarh Sampark Kranti Express (12823/12824)) (Bhilai WAP—7)
Durg - Bhopal Amarkantak Express (Bhilai WAP-7)
Nagpur - Bilaspur Intercity Express (Bhilai WAP-7)
Gondia - Raigarh Jan Shatabdi Express (Bhilai WAP-7)
Durg - Jammu Tawi Superfast Express (Bhilai WAP-7)
Kochuveli - Chandigarh Kerala Sampark Kranti Express (12217/12218) (Ghaziabad WAP-7)
Kochuveli Amritsar S/F Express (Ghaziabad WAP-7)
Dadar Amritsar Express (Ghaziabad WAP-7)
Bhubaneswar - New Delhi Duronto Express ( Ghaziabad WAP-7)
Sealdah Rajdhani Express (Ghaziabad WAP-7)
Thiruvananthapuram Rajdhani Express (12431/12432) (Ghaziabad WAP-7)
Bangalore Rajdhani Express (Lallaguda WAP-7)
Bangalore - New Delhi Karnataka Express (12627/12628) (Tughlakabad WAP-7) as of July 2013
Bilaspur Rajdhani Express (Ajni WAP-7)
Ranchi Rajdhani Express (Ghaziabad WAP-7)
Hazrat Nizamuddin - Ernakulam Duronto Express (Ghaziabad WAP-7)
Hazrat Nizamuddin Pune Duronto Express (Ghaziabad WAP-7)
Bandra Terminus Hazrat Nizamuddin Yuva Express (Ghaziabad WAP-7)
Yeshvantapur Delhi Sarai Rohilla AC Duronto Express (Ghaziabad / Lallaguda WAP-7)
Howrah - New Delhi Yuva Express (Ghaziabad WAP-7)
Allahabad New Delhi Duronto Express (Ghaziabad WAP-7)
Himalyan Queen Express (Ghaziabad WAP-7)
Vijayawada - Visakhapatnam Ratnachal Express (Lallaguda WAP-7)
Adilabad - Tirupati Krishna Express (Lallaguda WAP-7)
Tirupati - Hazrat Nizamuddin Andhra Pradesh Sampark Kranti Express (Lallaguda WAP-7)
Bihar Sampark Kranti Superfast Express (Darbhanga - New Delhi) (Ghaziabad WAP-7)
Taj Express (Ghaziabad WAP-7)
Chhattisgarh Express (Ajni WAP-7)
Amarkantak Express (Ghaziabad WAP-7)
Sewagram Express (Ajni WAP-7)
Goa Express (Ghaziabad WAP-7)
Bhopal Express (Tughlakabad WAP-7)
Korba - Thiruvananthapuram Express (Royapuram WAP-7)
Visakhapatnam - Hazrat Nizamuddin Samta Express (Tughlakabad WAP-7)
Kalka Shatabdi Express (Ghaziabad WAP-7)
Kalka Shatabdi Express (Ghaziabad WAP-7)
Kota - Hazrat Nizamuddin Janshatabdi Express (Tughlakabad WAP-7)
Ratnachal Express (Lallaguda WAP-7)
Agra - Jhansi Passenger (Ghaziabad WAP-7)
Bangalore - Chennai Express (12609/12610) (Lallaguda WAP-7)
Coalfield Express (Howrah WAP-7)
Kalka Mail (Howrah WAP-7)
Howrah - Dhanbad Double Decker Express (Howrah WAP 7)
Paschim Express (Ghaziabad WAP-7)
Indore - Hazrat Nizamuddin Intercity Express (Tughlakabad WAP-7)
Pune Nagpur Garib Rath Express (Ajni WAP-7)
Nagpur Duronto express (Ajni WAP-7)
New-Delhi Prayag Raj Express (Ghaziabad WAP-7)
Tirupati-Secunderabad Padmavati Express (Lallaguda WAP-7)
Howrah New Delhi Poorva Express (Ghaziabad WAP 7)
Purushottam Express (Ghaziabad WAP 7)
Kalinga Utkal Express (Tughlakabad WAP 7)
Gorakhpur Lokmanya Tilak Terminus Superfast Express (Ajni WAP-7)
Patna Rajdhani Express (Ghaziabad/Howrah WAP-7)
Bangalore City - Bangarapet Express (16521/16522) (Lallaguda WAP-7)
Manmad Junction - Lokmanya Tilak Terminus Godavari Superfast Express (12118) (Ajni WAP-7)
Lokmanya Tilak Terminus - Manmad Junction Godavari Superfast Express (12117) (Ajni WAP-7)
Mumbai Central - New Delhi Rajdhani Express (12951/12952) (Ghaziabad WAP-7)
Mumbai Central - Hazrat Nizamuddin August Kranti Rajdhani Express (12953/12954) (Ghaziabad WAP-7)
Pune Hazrat Nizamuddin Duronto express [GZB wap7]
Yeshvantpur-Nizamuddin Karnataka Sampark Kranti SF Express via Kacheguda(Lallaguda WAP-7)
Black Diamond Express (Howrah WAP-7)
Agnibeena Express (Howrah WAP -7)
Himgiri Express (Ghaziabad WAP-7)
Visakhapatnam - New Delhi Andhra Pradesh AC SF express (Train 22415/22416) (Ghaziabad WAP-7)
Jammu Tawi-Delhi Junction Shalimar Express Ghaziabad (GZB) WAP 7)
Karnavati Express (Vadodara WAP-7)
Pune Ahmedabad Duronto Express (Vadodara WAP-7)
Gujarat Mail (Vadodara WAP-7)
Mumbai New Delhi Duronto Express (Vadodara WAP-7)
August Kranti Rajdhani Express (Vadodara WAP-7)
Begampura express(Ghaziabad (GZB) WAP-7)
Mumbai Central–Ahmedabad Double Decker Express (Vadodara WAP-7)
Maharashtra Sampark Kranti Express (Vadodara WAP-7)
Gujarat Sampark Kranti Express (Vadodara WAP-7)
Jaipur Duronto Express (Vadodara WAP-7)
Indore Duronto Express (Vadodara WAP-7)
Accidents and incidents
On 10 July 2011 Kalka Mail derailed on the Kanpur-Fatehpur line near the Fatehpur railway station , more than 72 persons died and 200 were injured,some critically. The train was hauled by Ghaziabad-based WAP 7 30221. Malfunction of the undergear of the locomotive could also be a reason. The driver of the Kalka Mail said he saw the engine shaking. A post-accident diagnostic revealed that the first axle (leading) of the locomotive registered a jerk and the fourth axle (trailing bogie) showed loss of contact of the wheel with the track. The locomotive in question has been re-railed and is undergoing fault diagnostics and repairs.
On 14 December 2014 the 12381 UP Howrah - New Delhi Poorva Express derailed at 8.27 am after leaving Howrah at 8.15 am. 11 sleeper coaches and a pantry car (AC Hot Buffer Car) of the New Delhi-bound Poorva Express derailed at Liluah shortly after leaving Howrah station. There was no casualty or injury to any passenger. Like Kalka Mail this train was also hauled by Ghaziabad-based WAP 7. But the locomotive did not face much damage hence after undergoing fault diagnostics and repairs the locomotive has been re-railed.
