EMD GT46MAC
| EMD GT46MAC(4000hp)/GT46ACe(4500hp) | |
|---|---|
 WDG4 numbered 12029 of Hubli diesel locomotive shed. | |
| Specifications | |
| Power type | Diesel-electric |
| Builder | EMD and DLW |
| Model | GT46MAC |
| Build date | (EMD) 1997–1998; (DLW) 2002–present |
| Total produced | (EMD) 12 complete, 8 kit form; (DLW) 8 kit assembled, 550 + under license (still in production) |
| AAR wheel arr. | C-C |
| UIC classification | Co-Co |
| Gauge | 5 ft 6 in (1,676 mm) |
| Trucks | HTSC |
| Length | 69 ft 9 in (21.26 m) |
| Height | 13 ft 6 in (4.11 m) |
| Axle load | 67,000 lbf (300,000 N) |
| Locomotive weight |
277,800 lb (126,000 kg) or 1,389 short tons (1,240 long tons; 1,260 t) |
| Fuel type | diesel fuel |
| Fuel capacity | 1,600 US gal (1,300 imp gal; 6,100 L) |
| Prime mover | 16-710G3B |
| Engine type | two-stroke diesel |
| Aspiration | turbocharged |
| Displacement | 11,360 cubic inches (186.2 liters) |
| Alternator | TA-17-CA6A AC |
| Traction motors | 1 inverter per truck, AC traction motors |
| Cylinders | V16 |
| Transmission | diesel electric |
| Top speed | 75 mph (121 km/h) |
| Power output | 4,000 hp (2,980 kW) / 4,500 hp (3,360 kW) |
| Tractive effort | 121,400 lbf (540 kN) |
| Locomotive brake | Air |
| Train brakes | Air |
| Career | |
The EMD GT46MAC is a freight-hauling diesel-electric locomotive with AC electric transmission built by General Motors Electro-Motive Division[1] in 1997–1998 for Indian Railways, where they are classed as WDG4.[2] Thirteen were built by EMD as order #958647, and a further eight were exported in kit form and were assembled in India. The class entered service in 1999.[3]
Further construction has been under license in India by the Diesel Locomotive Works (DLW); more than 60 additional locomotives have been built as of 2006.[2] They are numbered from #12001 upward. A similar type, the EMD GT46PAC, has also been produced for passenger service in India.
As of 2007, EMD and DLW have begun building GT46Ace's using IGBT technology to replace the older Gate turn-off thyristor technology. Newer editions with 4,500 hp (3,360 kW) have been produced. Over 600 WDG4 locomotives are currently in operation.
History
WDG4s first started operations in 1999 with the numbering starting from 12001 (this loco can still be seen in a splendid condition and is homed at the parent shed of Hubli.) Hubli Diesel Locomotive Shed has been operational since 1999, and it houses the maximum number of WDG4s from 12001-12064, 12067-12153, 12156, 12169, 12189, 12227, 12276, 12311–12313, 12325, 12326. The original WDG4s from 12001–12021 were imported and later on DLW started manufacturing it indigenously. With six traction motors, this locomotive has the capability of touching 105 km/h (65 mph) with a fully loaded freight train of 58 wagons. The locomotive has been praised for its ability to work smoothly in regions with massive gradients, especially in the Braganza Ghats and the Subrahmanya ghats having a gradient of 1:37 and 1:50 respectively.
New specifications
A new model of the WDG4 has been manufactured which develops 4,500 hp (3,360 kW) and has a broader fibreglass cabin, wider wind screens, among other features. These locomotives have been specified as GT46ACe models. WDG4s are being looked into as future locomotives for freight operations in non-electrified sections of India. A new EMD locomotive classified as WDG5 # 50001 with 5,500 hp (4,100 kW) of power output has been manufactured, and is currently under testing at DLW(diesel locomotive works).[4]
Engine sheds holding WDG4s
Sheds holding WDG4s as of February 2014:
| Shed | Number of locos | Railway |
|---|---|---|
| Hubli (UBL) | 164 | South Western Railway (SWR) |
| Sabarmati (SBI) | 130 | Western Railway (WR) |
| Gooty (GY) | 100 | South Central Railway (SCR) |
| Siliguri (SGUJ) | 101 | North East Frontier Railway (NFR) |
| Bhagat Ki Kothi (BGKT) | 87 | North Western Railway (NWR) |
| Lucknow (LKO) | 47 | Northern Railway (NR) |
| Raipur (R) | 36 | South East Central Railway (SECR) |
| Pune (PUNE) | 40 | Central Railway (CR) |
| Golden Rock (GOC) | 19 | Southern Railway (SR) |
| Izatnagar (IZN) | 10 | North Eastern Railway (NER) |
| Kazipet (KZJ) | 25 | South Central Railway (SCR) |
| Kalyan (KYN) | 4 | Central Railway (CR) |
| Jamalpur (JMP) | 4 | East Railway (ER) |
| Tuklakabad (TKD) | 40 | Northern Railway (NR) |
| Jhansi (JHS) | 10 | North Central Railway (NCR) |
| Vishakhapatnam (VSKP) | 4 | East Coast Railway (ECoR) |
| Krishnarajapuram (KJM) | 9 | South Westren Railway (SWR) |
| Patratu (PTRU ) | 4 | East Central Railway (ECR ) |
| Bondamunda (BNDM) | 17 | South Eastern Railway (SER ) |
See also
References
- ↑ "GM EMD: GT46MAC". Archived from the original on 2004-03-03. Retrieved 2006-11-19.
- ↑ 2.0 2.1 "[IRFCA] Indian Railways FAQ: Diesel Locomotive Classes – Broad Gauge". Retrieved 2006-11-19.
- ↑ "[IRFCA] Indian Railways FAQ: IR History, Part 6". Retrieved 2006-11-19.
- ↑ http://webcache.googleusercontent.com/search?q=cache:fVYt57LMZM0J:s1.mywibes.com/ac_project.ppt%3FFileID%3D171fe9821ca2c31745d5ca683ece2187%26s%3D6b4f812db83a250bf15de565e6092159+&cd=2&hl=en&ct=clnk&gl=us
External links
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Wikimedia Commons has media related to EMD GT46MAC locomotives. |
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