Iore

The Ofoten Line and the Iron Ore Line are two railroad lines which were built to allow iron ore to be hauled from the LKAB's mines in Kiruna, Svappavaara and Malmberget in Sweden to Luleå on the Baltic Sea in Sweden and to Narvik on the Norwegian Sea in Norway. Historically, these lines were operated by the Norwegian State Railways (NSB) in Norway and the Swedish State Railways (SJ) in Sweden, but in 1996 the operations, but not the infrastructure, were transferred to the new company Malmtrafik i Kiruna (MTAB), a joint venture between LKAB, NSB and SJ, and its Norwegian subsidiary Malmtrafikk (MTAS). At the time, the line was using El 15 and Dm3 locomotives. In 1998, LKAB estimated a steady 35% increase in iron ore production until 2005, and requested that the governments grant sufficient funding to upgrade the lines from to maximum permitted axle load. Combined with new locomotives, this would give increased efficiency in hauling the ore from the mines. The upgrade was estimated to cost 180 million Norwegian krone (NOK) for the Ofoten Line alone. In March 1998, LKAB awarded the contract to build 750 new 100-tonne hopper cars to Transnet of South Africa. In August, an agreement was reached whereby LKAB would pay NOK 100 million of the NOK 130 million needed to upgrade the Ofoten Line. The contract to deliver 18 locomotives was signed with Adtranz Switzerland In 1999, LKAB bought SJ's and NSB's share in MTAB. The first two sections were delivered by Adtranz in August 2000, and was subjected to intensive tests before the manufacture of the rest of the series. Commissioning concluded in December 2000, In May 2001, Bombardier Transportation took over Adtranz. Bombardier delivered the rest of the Iore series from 2002 to 2005. While the first pair of locomotives had Janney couplers, the rest of the locomotives were equipped with SA3 couplers to handle the existing hopper cars, and the cars bought from K-Industrier. The locomotives and Transnet wagons with Janney couplers were retrofitted with SA3 couplers. In 2004, the El 15 locomotives were sold to Hector Rail. On 23 August 2007, LKAB ordered another four twin units, with delivery in 2010 and 2011, and costing €52 million. These will replace all remaining Dm3 locomotives by 2011, and LKAB convert all the ore trains to 68 cars. This will increase the capacity from 28 to 33 million tonnes per year, and at the same time reduce the number of departures per day from 21 to 15. The name Iore is a mixture between the term "iron ore", and the fictional character Eeyore from Winnie-the-Pooh, spelled "I-or" in Swedish. ==Specifications==

The Iore class was a cold-adapted and heavy-haul derivation from Adtranz's Octeon modular electric locomotive platform, Adtranz and later Bombardier Transportation conducted the final assembly of the locomotives at Kassel, Germany. however, it was excluded from the TRAXX family by the time of the second batch order in 2007. The manufacturer has also referred to the locomotive type as the Bombardier Kiruna. The units are fed with via a pantograph. The power is transformed and then converted via a single water-cooled gate turn-off (GTO) thyristor based converter per bogie. The converters belong to the Camilla family, which was developed by ABB's Swiss branch as successor for its oil-cooled converters, and found previous use in the FS Class E464. The converters operate independently, with their own cooling and control systems and are shut down automatically in case of failure. The converters consist of seven line-replaceable unit modules to minimize maintenance costs. Each locomotive has six three-phase asynchronous alternating current traction motors, each rated at and each powering a single axle. This gives a Co′Co′ wheel arrangement. The tractive effort of each locomotive is and the maximum dynamic braking effort is . There is also a boost function, allowing a temporary traction effort of . The units are capable of in single runs, with empty trains and with loaded trains. The locomotives are long, tall and wide. The distance between the bogie centers is and the bogie wheel-base is . The wheel diameter is when new and when worn. Each locomotive weighs , of which is electrical equipment. Each locomotive has of dead weight to increase the locomotive's weight to the maximum axle weight, and further weight increase has been achieved by making the walls wide with armored steel. The extra wall thickness also provides for increased structural strength, to withstand collisions with snowdrifts and elk. The sides of the walls were built as flat as possible to reduce the sticking of blowing snow and ice formation. The auxiliary system is powered via a separate transformer winding feeding three independent insulated gate bipolar transistor (IGBT) converters each providing a three-phase 400 volt system. The locomotive is designed with an open system architecture that can be adapted later. Diagnostic information is available to the driver and can be sent to the control center via GSM-R. The locomotive has a large and bright cab with space for up to three people. The second series of locomotives have an improved driver's chair, which has been retrofitted on the older trains. The machine room has a center hallway. All high-current equipment is located behind a door which can only be opened with a special key. This key is locked in such a way that it cannot be accessed without grounding the locomotive, and similarly the locomotive cannot be ungrounded again until the key is back in place. ==Operation==

LKAB operates iron ore mines in Kiruna, Svappavaara and Malmberget in Norrbotten County, Sweden. Most of the output is transported by rail to the ice-free Port of Narvik, a route named the Northern Circuit. A minority of the ore is transported to Luleå on the Southern Circuit. Located on the Baltic Sea, ore is shipped to Baltic customers, or delivered to furnaces operated by SSAB in Luleå and Oxelösund. The Iron Ore and Ofoten Lines are long, including the branch to Svappavaara, with the route from Kiruna to Narvik being , and from Malmberget to Luleå being . Operations are handled by LKAB's subsidiary Malmtrafik i Kiruna (MTAB) in Sweden, and Malmtrafikk (MTAS) in Norway. As of 2010, six pairs of the first batch Iore locomotives From Riksgränsen on the national border to the Port of Narvik, the trains use only a fifth of the power they regenerate. The regenerated energy is sufficient to power the empty trains back up to the national border. Although the trains and hopper cars are all owned by LKAB, the line is owned by the Swedish Transport Administration and Bane NOR. ==See also==