NSB Di 8
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NSB Di 8 | |
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Caterpillar 3516 DITA[1] |
Performance figures | |
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Maximum speed | 120 km/h (75 mph)[1] |
Power output | 1,570 kW (2,110 hp)[1] |
Career | |
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Operators | Norwegian State Railways 1997–2002 CargoNet 2002– GB Railfreight 2011– |
Numbers | 8.701–720 |
The NSB Di 8 is a class of
Twenty locomotives were delivered in 1996, largely based on MaK's previous production series, the Dutch NS Class 6400 and German DE 1002, although receiving some upgrades to the specifications. NSB took delivery of the class to replace the aging Di 3, and the units have been used on freight trains on un-electrified lines, including the Nordland Line and the Røros Line. They were transferred to CargoNet in 2002, when NSB's cargo division was demerged. Ten units were sold to GB Railfreight in 2011 and are used at the Scunthorpe Steel works in Scunthorpe, United Kingdom.
History
During the late 1980s, the
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/77/CargoNet_Di_8_hauling_freight_tain_on_Nordlandsbanen.jpg/220px-CargoNet_Di_8_hauling_freight_tain_on_Nordlandsbanen.jpg)
A MaK-built DB Class 240 locomotive was test-run in Norway during 1990.[5] On 23 November 1992, NSB's board decided to order ten similar units, later expanded to twelve, which would primarily be used in passenger trains. During the procurement process, NSB started to pursue the smaller locomotives for freight trains,[2] and turned to MaK to investigate their smaller locomotives. NSB's need for hauling power was dire enough that the company leased two locomotives of two classes of diesel-electric locomotives, the SJ T44 from the Swedish State Railways and the MaK-built NS 6400 from Nederlandse Spoorwegen.[1]
The NS 6400 was built through a cooperation between MaK and
Delivery of both the Di 6 and 8 commenced in 1996.[4] The first Di 8 was delivered on 8 June 1996 and the last on 10 June 1997.[1] NSB hoped that the combined 32 locos would be sufficient to replace all the Di 3s. However, the Di 8s were at first put into use on freight trains in Eastern Norway, largely running on electrified lines and thus not replacing the Di 3. Unlike their larger counterparts, which were unsuitable for service and returned to the manufacturer, the Di 8 proved a sufficiently reliable to remain in operation.[4] The Di 8s were gradually introduced on the Nordland Line and Meråker Line to replace the Di 3 on freight trains. The Di 8 operated in pairs, which proved to be an optimal power ratio and driving times on the Nordland Line. On the other hand, the locomotives had high operating costs, in part because of the twin configuration, and proved less reliable than NSB had hoped.[9]
No. 714 was plagued with operational problems because of errors in a generator. Delivered in January 1997, it was retired in late 2000 and started being used for parts from 2002. This makes it one of the shortest-serving locomotives in NSB's service.[10] NSB's initial motivation for the smaller units was to haul conventional local freight trains and affiliated heavy-duty shunting. With the reorganization of the railways during the late 1990s and early 2000s, this job fell out of use, making the locomotives poorly suited for NSB's network. The locomotives passed to CargoNet in 2002, after the split of Norwegian State Railways (NSB) into passenger and freight companies.[11] From the mid-2000s CargoNet started looking for a replacement for the Di 8 in the freight trains, especially for on the Nordland Line. The company decided to lease six EMD Class 66 units, which entered service in Norway in 2005. The Di 8 remained in service, but in other trains.[9]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/48/Two_CargoNet_Di_8_hauling_timber.jpg/220px-Two_CargoNet_Di_8_hauling_timber.jpg)
On 4 April 2011, a fire broke out on a Di 8 locomotive at
With the delivery of the Class 66 and later the
On closure of
Fleet List
NSB Number → Status
8.701 → In Service British Steel Scunthorpe
8.702 → In Service British Steel Scunthorpe
8.703 → In Service British Steel Scunthorpe
8.704 → In Service British Steel Scunthorpe
8.705 → In Service NSB Berging og Beredskap AS
8.706 → In Service NSB Berging og Beredskap AS
8.707 → In Service NSB Berging og Beredskap AS
8.708 → In Service British Steel Scunthorpe
8.709 → In Service NSB AS
8.710 → In Service NSB AS
8.711 → Out of Service, for parts in Redcar (GB)
8.712 → Out of Service British Steel Scunthorpe
8.713 → In Service NSB Berging og Beredskap AS
8.714 → Scrapped Norway (Reliability Issues)
8.715 → In Service NSB Berging og Beredskap AS
8.716 → In Service British Steel Scunthorpe
8.717 → In Service British Steel Scunthorpe
8.718 → Out of Service, for parts British Steel Scunthorpe
8.719 → In Service British Steel Scunthorpe
8.720 → Out of Service British Steel Scunthorpe
Specifications
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/CargoNet_Di8.708_ved_H%C3%B8nefoss_3.jpg/220px-CargoNet_Di8.708_ved_H%C3%B8nefoss_3.jpg)
The Di 8 is a diesel-electric locomotive with a
The locomotives employ a Siemens Sibas 32 control system, along with an electrical transmission system from the same manufacturer. It takes advantage of water-cooled gate turn-off thyristor (GTO) semiconductor technology for pulse-width modulation inverters to supply power to the alternating current traction motors, located on a nose-suspended drive. The auxiliary electrical equipment was powered by an insulated-gate bipolar transistor (IGBT) inverter.[20] NSB's Di 3, Di 4, Di 6 and Di 8 can all be run with together with up to three locomotives in multiple.[2] The class is characterized by motormen as a comfortable locomotive with a good working environment.[9] Due to their loading gauge, the Di 8s cannot be used on the British mainline railways, and are limited to being used on the internal steelworks railways.[11]
In comparison to the NS 6400 and DE 1002, the Di 8s are 3.0 meters (9.8 ft) (NS) and 4.4 meters (14 ft) longer. The electrical transmission system saw
References
- ^ a b c d e f g h i j k l m n o p q Patrick Böttger; Patrick Paulsen; Andreas Kabelitz; Malte Werning (eds.). "MaK - Di 8 für die NSB" (in German). Loks-aus-Kiel. Retrieved 14 March 2014.
- ^ a b c d Næss: 138
- ^ Næss: 72
- ^ a b c Næss: 100
- ^ Patrick Böttger; Patrick Paulsen; Andreas Kabelitz; Malte Werning (eds.). "MaK - Di 6 für die NSB" (in German). Loks-aus-Kiel. Retrieved 16 January 2012.
- ^ a b Patrick Böttger; Patrick Paulsen; Andreas Kabelitz; Malte Werning (eds.). "MaK - DE 6400 für die Nederlandse Spoorwegen (NS)" (in German). Loks-aus-Kiel. Retrieved 14 March 2014.
- ^ a b Patrick Böttger; Patrick Paulsen; Andreas Kabelitz; Malte Werning (eds.). "MaK - DE 1002" (in German). Loks-aus-Kiel. Retrieved 14 March 2014.
- ^ Patrick Böttger; Patrick Paulsen; Andreas Kabelitz; Malte Werning (eds.). "MaK - DE 1004" (in German). Loks-aus-Kiel. Retrieved 14 March 2014.
- ^ a b c Svärd, Øyvind (2005). "Nye diessellokomotivier". Lokotivmands Tidende. National Union of Norwegian Locomotivemen. Retrieved 14 March 2014.
- ^ "Di 8 – CargoNet". På Sporet (in Norwegian). 155: 56. 2013.
- ^ a b c d e "Di 8 – CargoNet". På Sporet (in Norwegian). 150: 69. 2012.
- ^ Holm, Per Annar (2 April 2012). "Dårlig vedlikehold kan ha ført til brann". Archived from the original on 5 April 2012. Retrieved 8 May 2012.
- ^ GB Railfreight wins substantial steel contract with SSI, GB Railfreight, 25 October 2011, retrieved 15 March 2015
- Rail Expressissue 186 November 2011 page 7
- ^ "First Norwegian GBRf locomotives arrive in Great Britain" (PDF), Railway Herald (296): 8, 19 December 2011
- ^ "Cargonet locos settle into new environment in Redcar" (PDF), Railway Herald (297): 6, 9 January 2012
- ^ "Di 8 – CargoNet". På Sporet (in Norwegian). 156: 57. 2013.
- ^ "Lackenby ssi site 008". Flickr. 3 February 2012.
- ^ https://www.loks-aus-kiel.de/
- ^ a b "Reference List: Diesel-Electric Locomotives" (PDF). Siemens Mobility. p. 42. Archived from the original (PDF) on 29 August 2012.
Bibliography
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- Næss, Ståle (1999). Di 3: Billedboken om en loklegende (in Norwegian). BSN Forlag.