IR class WDM-3D
| IR class WDM-3D | |
|---|---|
 WDM-3D 11307 from the Itarsi depot
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| Numbering: | 11101-11590 |
| Number: | 590 + 20 locomotives converted from WDM-3B |
| Manufacturer: | DLW , large components from BHEL |
| Year of construction (s): | 2003-2016 |
| Axis formula : | Co'Co ' |
| Gauge : | 1676 mm |
| Length: | 17,350 mm ( measured over the buffer beam) |
| Height: | 4,162 mm |
| Width: | 3,016 mm |
| Total wheelbase: | 12,834 mm |
| Service mass: | 117 t |
| Wheel set mass : | 19.5 t |
| Top speed: | 120 km / h |
| Installed capacity: | 3,300 hp |
| Starting tractive effort: | 380 kN (38.6 t) |
| Wheel diameter: | 1097 mm |
| Motor type: | Alco 251-B |
| Motor type: | Four-stroke - V16 with turbocharger |
| Rated speed: | 1050 min −1 (8th gear) |
| Power transmission: | electric , three-phase generator with DC traction motors |
| Tank capacity: | 5,000 l |
| Number of traction motors: | 6 pieces.BHEL 5002AZ CGL 7362A |
| Drive: | Pawbearing drive |
| Transmission ratio: | 1: 3.61 |
| Train brake: | Air brake |
The locomotives of the WDM-3D series are diesel-electric locomotives that were built from 2003 by the Diesel Locomotive Works (DLW) in Varanasi for Indian Railways . The series designation consists of W for wide ' Breitspur ' , D for diesel , M for mixed ' universal locomotive for goods and passenger traffic ' and 3 for a locomotive with an output between 3000 and 4000 hp . Between 2003 and 2016, more than 590 units were built in the DLW.
The WDM-3D is one of the most successful locomotives of Indian Railways, which is a multiple improved version of the WDM-2 . Some WDM-3D locomotives were exported to neighboring countries such as Sri Lanka Railways or given away to Bangladesh . As of January 2020, India Railways still had a significant number of locomotives in service on both main and branch lines. Further locomotives of the WDM-3D series were created by converting locomotives of the WDM-3B series .
history
The WDM-3D is based on the WDM-2 diesel locomotive imported from the USA in 1962 , which was developed by the American Locomotive Company (ALCo). The locomotives are extremely robust and easy to operate and maintain, which is why DLW, the diesel locomotive factory of Indian Railway, together with the Research Design and Standards Organization (RDSO), the research and development organization of Indian Railways, revised the design several times and with stronger ones Equipped engines.
By integrating components of the EMD locomotives GT46MAC and GT46PAC into the ALCo platform, the WDM-3A became the WDM-3D. The first locomotive was delivered in July 2003 with the number 11101. It came to the Krishnarajapuram depot in the Bengaluru region with another four locomotives , but was later relocated to Erode . Series production began at the end of 2005. The first WDM-3D locomotives had problems with the control technology, which likely led to the development of the WDM-3B in 2005. This series is based on the WDM-3D, but has no microprocessor control . With over 590 units built, the WDM-3D is considered a successful design, although production has now been converted to newer series.
A locomotive has a shortened stem similar to the WDP-4. It bears the number 11121 and is based in Erode.
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technology
The WDM-3D is the more powerful version of the WDM-3A , which is 50 cm shorter than the WDM-3A. The locomotives are equipped with a 3,300 HP diesel engine Alco 251-C , which can deliver a maximum traction power of 2,925 HP. It is an improved version of the 16-cylinder Alco 251-B engine. A more powerful version of the engine with 3500 hp should give the locomotive enough power to move passenger trains with 24 cars at 110 km / h. The WDM-3D only has air brakes , no suction air brakes , and can operate in double traction.
The main components of the electrical equipment are supplied by Bharat Heavy Electricals (BHEL). The diesel engine drives a three-phase generator , the output voltage of which is fed to a static rectifier. This provides the six DC - Tatzlager - traction motors with energy, wherein each of the three driving engines of a bogie are connected permanently in parallel. The gearboxes have a ratio of 18:65. The drive train is regulated by a microprocessor control. It regulates the excitation of the generator according to the speed level specified by the driver and ensures optimum use of the adhesion.
The bogies are an improved version of the one used in the WDG-3A series. It is a welded three-axle Alco bogie for high utilization of the frictional connection between wheel and rail, with friction coefficients of 0.33 being achieved. Vertical and transverse dampers ensure reduced slip and less wheel wear, so that maintenance costs can be saved.
The tank has been made smaller than the WDM-3A to save weight, so that it still holds 5,000 liters of fuel. The locomotives are also equipped with position lights outside the cabin doors, electric macro microphones and high-performance buffers. Components and auxiliaries have been improved to increase the intervals between required maintenance.
Depot with WDM-3D
On August 1, 2020, 502 WDM-3D were still in service, which is about 10% of all Indian Railways diesel locomotives. The locomotives were distributed among the regional companies' depots as follows :
- Central Railway (CR)
- Eastern Railway (ER)
- Howrah (HWH): 21
- Eastern Central Railway (ECR)
- Samastipur (SPJ): 37
- East Coast Railway (ECoR)
- Visakhapatnam (VSKP): 12
- Northern Railway (NR)
- Lucknow (LKO): 59
- North Central Railway (NCR)
- Jhansi (JHS): 29
- North Eastern Railway
- Izzatnagar (IZN): 37
- Northeast Frontier Railway (NFR)
- Malda Town (MLDT): 15
- New Guwahati (NGC): 11
- Southern Railway (SR)
- Erode (ED): 51
- South Central Railway (SCR)
- South Eastern Railway (SER)
- Bondamunda (BNDM): 15
- South Western Railway (SWR)
- Krishnarajapuram (KJM): 4
- Western Railway
- Western Central Railway (WCR)
- Itarsi (ET): 43
- New Katni Junction (NKJ): 8
Sri Lanka
Ten WDM-3D locomotives were purchased from Sri Lanka Railways (SLR) in 2012 . The locomotives designated with the M10 series were the largest and most powerful locomotives on the railroad when they were purchased. Some technical data differ from those of the Indian locomotives. The locomotives were first used to build the Talaimannar - Kankasanthurei line. After the extension of the northern line to Jaffna and beyond, M10 locomotives were used for passenger transport. They also haul the prestigious Yal Devi express train .
Web links
- WDM-3. In: Facebook. Retrieved on August 3, 2020 (English, Facebook group with many pictures).
Individual evidence
- ↑ a b c d DLW (Ed.): WDM3D - 3300 HP . Data sheet. ( archive.org [PDF]).
- ^ Classification of Locos. IRFCA, accessed August 5, 2020 .
- ^ Diesel Locomotive Roster - The WDM (ALCO) Series. In: 24coaches. October 30, 2013, Retrieved August 4, 2020 (American English).
- ↑ RDSO (ed.): Locomotive Center RDSO . S. 24 ( net.in [PDF]).
- ↑ WDM-3D 11121. In: Indian Railways Locomotive Roster. IRFCA, accessed August 4, 2020 .
- ↑ Manish Jain: Shedwise / typewise diesel loco holding as on 1-8-2020 . In: Diesel locomotives availability target for Aug 2020 . ( gov.in ).
- ↑ Class M10. In: Sri Lanka Railways Info Page. September 19, 2012, accessed June 17, 2020 .
- ↑ Chandika: Locomotive M10. In: Loco Lanka. May 23, 2015, accessed August 4, 2020 (Sinhala).