Railway electrification in Iran
||This article needs attention from an expert in Trains or Iran. (August 2009)|
||This article needs additional citations for verification. (August 2011)|
|Tehran-Mashhad Railway Electrification (TMRE)|
Railway network in Iran
|Status||Electrification started February 2012|
|Stations||49, train length 700 m (35 ch)|
|Services||80% passenger, 20% freight|
|Daily ridership||50 million pass. 12 million frgh|
|Rolling stock||6 MW|
|Line length||926 double track, UIC 60, CWR 98%|
|Track length||2,200 km (1,367 mi)|
|No. of tracks||2 (4 track, 114 km tehran garmsar)|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in) standard gauge|
|Loading gauge||Axle Load = 22.5 ton|
|Electrification||25 kV AC 50 Hz|
|Operating speed||200 km/h (124 mph) pass. trains, 250 km/h (155 mph) tilting trains|
|Highest elevation||826–1,666 metres (2,710–5,466 ft)|
Railway electrification in Iran describes the past and present electrification systems used to supply traction current to rail transport in Iran with a chronological record of development, a list of lines using each system, and a history and a technical description of each system.
looking to the History of rail transport in Iran we will find starting the railway in Iran after the electric railway was realized in the world.
Early electrification: Tabriz-Jolfa
After initial negotiations in 1969, railway electrification in Iran started in 1975, with a contract with Russia to electrify the Tabriz to Jolfa route in East Azarbaijan Province near the border with the former Soviet Union. The work would include a Bogie exchange facility. The Tabriz-Jolfa line was originally established in 1916 (before the main network in 1938) with the wide gauge 1,524 mm (5 ft) and was changed to standard gauge after connection of Tabriz to the national network. Tabriz-Jolfa is a single line rail track 146 km long with nine stations in between. The maximum grade is 2.8% and the minimum curve radius is 400m.The catenary voltage is 25KV with booster transformer.three substations in tabriz, Marand and jolfa with 4, 3 and 3 single phase transformers from Alstom each 15 MW capacity supply the power
The 8 locomotives in this linewith Bo-Bo configuration have been built by ASEA from Sweden type RC4 from SJ Rc family.
The electric line voltage is 25 kV, 50 Hz, ( 25 kV AC railway electrification) with substations in Tabriz, Marand and Jolfa fed by 132 kV from the national grid. The end substations have three 15MW transformer and the Marand substation has four transformers.
|Rank||Year||Orig.||Dest.||Dis.||Voltage, KV||power, MW||SS Dis., Km||Speed., Km/h||mast D., m||stagger len., m||pant. w., m||mast C., m||Height., m||Block l., m||Wire mm^2||Tens., Kn||Reg. brk.|
Track specifications in current and planned electrified lines in Iran are as follows:
|Rank||Year||Orig.||Dest.||Dis.||Tunnel||Stations||D.T.%||T.C. Dis.||clear. Height||clear. Width||Train Length||Train Load||Axle load||Leaner Load||rail weight||Con. Weld||Min. Curve||Max. Grade||Max. Speed||Station Speed||Train control|
|country||Year||Orig.||Dest.||Dis.||D.Track %||train cap.||Train Length||Train weight||passenger||freight||Pass. A.S.||frt. A.S.||T.P. demand||T.F. demand||Max. Speed||max P.C.||Max F.C.|
|This section does not cite any references or sources. (July 2010)|
Recently another contract was signed with the Russian railway RZD in February 2009 to connect the Tabriz electric line to Azarshahr to the south with a length of 46 km single track with 140 km/h speed that was inaugurated in 2012 Oct. 13th.
Continuing to Bonab and Maragheh and possibly to Urmia through the Shahid Kalantary bridge. That has the rail track inside, like Oresund Bridge.The existing electric line could be connected to Oroumieh and Maragheh.
A tender for electrification of the Tehran-Mashhad double track line, would supply 70 electric locomotives with cab signaling that will increase the speed to 200 km/h for passenger car trains and 250 km/h for tilting trains. Electric Multiple Train (EMU) will reduce the existing journey time from 12 hours down to 6 hours. The line is equipped with Optical fiber communication and CTC center for railway signal. This project as well as electrification and locomotives, also includes SCADA, 5 years maintenance, and back up power generation. The contract includes dual mode vehicles for maintenance. A ceremonial construction start for the Tehran-Mashhad electrification took place on 1 February 2012. The completion is expected in 2014.
Effects on stations
The locomotives in Tabriz-jolfa has been built by ASEA from Sweden type RC4 from SJ Rc family with 3600 KW and 100 km/h and 8 units.
New locomotive specification
The passenger locomotives (with (Bo-Bo) according to UIC classification of locomotive axle arrangements) continuous tractive effort is more than 240 kn and for freight (Co-Co) is more than 480 kn and the all weather adhesion is at least 33%. The passenger locomotives are equipped with head end power (HEP).
The desired locomotives prototype would be available 6 months sooner than end date of inauguration to pass the Homologation phase. The mockup and pilot experiment for EMU could be used to expedite the accepting process.
Common platform locomotive
One of the major bottleneck to start operation of an electrified line in countries like Iran with rare electric track is to use the concept of Common platform locomotive like TRAXX from Bombardier that makes the supply phase faster and more cost effective. This capability has been considered in Iranian Railways AD43C that is originally diesel electric but could be converted to electric locomotive. This capability has not been considered in IranRunner. 
Dual mode locomotive
another solotion is using Dual mode loco for stepwise electrification. electro-diesel locomotive
locomotive approval test
The initial study was done by RAI vice president for planning and international affairs in 2003 specially by calculating the benefit of electrification in locomotive saving in long passenger trains that was argued by the railway research center MATRAI. After convincing the top managers and management and planning organization (MPO), it was approved by the government to make a feasibility study for electrification and this was accepted by the parliament in 2007.
The study was carried out by a joint of Metra and Italferr according to United Nations Industrial Development Organization (UNIDO) and FIDIC recommendations and Tehran—Mashhad was assigned as the first priority for being electrified. After this phase the tendering pre-qualification was prepared by a new joint venture of Metra and Systra and the request for proposal (RFP) was released with conceptual design and by result obligations.
Although railway electrification in Iran was started in 1975 but then it was stopped for almost 30 years. A contract for electrification of the Tehran-Mashhad double-track line and the supply of 70 electric locomotives was awarded in 2009. Speeds of up to 200 km/h for locomotive-hauled passenger trains and 250 km/h for tilting EMUs will reduce existing journey times of 7.5 to 12 to less than 5 hours.
Tehran Metro line 5
One of the Electric railways in Iran is Line 5 of metro that uses 25 KV OCS and is operated by Tehran Metro.
On 7 March 1999, an overland Tehran-Karaj express electric train started a limited service of 31.4 km between Azadi Square (Tehran) and Malard (Karaj) calling at one intermediate station at Vardavard. The line was constructed by the Chinese company NORINCO.
It is planned to expand electrification to the northwest up to Tabriz (with 200 km/h speed for passenger trains and 250 for tilting EMU or such trains like Railjet) that is part of Silk Road and the transit route from Almaty to Istanbul and islamabad to Istanbul as one of main task and objectives of ECO Economic Cooperation Organization and one of the emphasized routes of ESCAP United Nations Economic and Social Commission for Asia and the Pacific.
The first phase of this project will be from Tehran to Zanjan (city) to make it more economic and also to prepare the new under construction short cut from Tabriz to Mianeh that will decrease the distance from Tehran to Tabriz about 100 km and for this stepwise plan the dual mode or Electro-diesel locomotive could help justifying the project.
A brief study was done to prepare a Comprehensive planning for electrification development in RAI.
|Route||Length||traffic 2011||fuel saving||Date||Max. speed|
|Tehran-Mashhad||926||20 pass. +5 frt.||250||2012||250|
|Tehran-bandarabbas||1350||10 pass. + 60 frt.||4000||2014||160|
|Tehran-Tabriz||600||20 pass. + 5 frt.||100||2014||250|
|Chadormaloo-Ardakan||220||1pass. + 10frt.||100||2011||120|
|This section does not cite any references or sources. (December 2010)|
Comprehensive Transport Study of Iran
Parallel to the dynamic and flexible policies of the Islamic Republic of Iran regarding socio-economic development plan, Comprehensive Transportation Studies of Iran Comprehensive Transportation Studies of Iran (CTSI), has been implemented to design an optimum and multilateral transportation system best in order to satisfy economical and secure movement of goods and passengers. The overall target of this plan is to prepare a program including reports and studies that comprises the main strategies for leading the Islamic Republic of Iran’s transportation system as well as determining the priorities of allocating resources by considering the existing policies, criteria, necessities and priorities. Hence, the CTSI project is planned for achieving an optimum transportation system based on betterment of current situation and presenting investment priorities of transportation infrastructures in a twenty-year outlook in order to provide means for economical and secure movement of Goods and passengers with a constant view to economic, social and cultural development plan policies of country.
|This section does not cite any references or sources. (December 2010)|
On freight corridor, the electrification of Bafgh—Bandarabbas in Persian Gulf is planned as a Build-Operate-Transfer project with future continuation to Tehran and Intermodal freight transport at both ends plus the Classification yard.
Iron ore is one of the main commodities on this line, especially from Golgohar mine near Sirjan, Choghart and Chadormaloo near Bafgh to Isfahan for two steel plants and steel mills named Zobahan (Esfahan Steel Company) and Mobarakeh.
As the rail connection with Zahedan will be inaugurated in near future, it will make it possible to have a direct transit line from Central Asia to Pakistan and India possibly with variable gauge bogies and could be completed with a link to Chabahar port in the south east of the country.
The business plan to justify the electrification and supplying locomotives is going to be prepared.
Transport demand is increased more than GDP in freight and less than it in passenger sector, and it is essential to provide appropriate means for transport by investing in infrastructures. Multiple structures have been considered, including BOT similar to Taiwan High Speed Rail as a Public-private partnership(PPP) type investment.
Electrification affects on stations
Electrification causes increased capacity of railway so the Railway station layout changes accordingly. some of Railway stations in Iran are suitable for electrification specially those that have been constructed after Islamic Revolution.
This is specially due to railway safety relative to Road traffic safety, considering the Value of life. Also energy from well to wheel, and the necessity to reduce pollutions and greenhouse gas in earth according to the Kyoto Protocol. The new approach to manage the CO2 is carbon credit.
Electrification effect on CDM
One of the results of electrification is Clean Development Mechanism, for carbon dioxide reduction. The Clean Development Mechanism (CDM) is one of the flexibility mechanisms defined in the Kyoto Protocol
Machines for catenary construction and maintenance
It has now become possible to replace whole catenary sections with the track concerned only needing to be closed to normal traffic for a period of less than five hours.dual mode vehicles for maintenance has been considered as well. Moreover, trains are able to run at their full speed again immediately after the work has been completed.
Machines for Catenary Construction and Maintenance 
Innovative catenary installation 
Some of main UIC standards in railway electrification are:
UIC 791-1, Maintenance guidelines for overhead contact lines
UIC 799,Characteristics of a.c. overhead contact systems for high-speed lines worked at speeds of over 200 km/h
And European union codes like:
En-50119, Cenelec standard Railway Electric Traction Contact-Lines
IEC 61133- Rules for testing of electric locomotive
The first electrification standard for Iran was prepared by Kampsax(COWI) in 1977 as part of a general standard.
IDRO Industrial Development and Renovation Organization of Iran as a developing organization is responsible to develop the industry sector and to accelerate the industrialization process of the country. It has become one of Iran' largest holding company/conglomerate (company) in recent years.
Iranian railway industry are either belonging to IDRO or private sector and the electrification industries among them are like: Tam (irankhodro), Sanam, Irantransfo.
Because of short history of railway electrification and suburb metro with 25KV there are not so many consultants for this in Iran, but some of them are as METRA, Imer, Moshanir, Harazrah, Iranoston, Araco(Azarakhsh rail Aria).
The Electrification cost as part of railway prices and costs depends on the speed or the class of the track like Speed limits in the United States (rail). In 1984 the world bank's Railways and Energy report provided estimates of typical costs.
According to the book of Prices and Costs in the railway sector by Professor Baumgartner from Switzerland the rough estimation of traction substation cost is 0.2 million euro per megavolt amper and 0.2 million euro per km of line with 300 km/h and 0.15 for 100 km/h.
Tariff of electrification equipment in Iran is 5% for locomotive and machineries.
Right-of-way in railway in Iran is 35m but with electrification needs to be increased for higher speed and safety reasons.
Railway Electrification Education
For higher education, it is considered to have MS level in railway faculty in IRAN University of science and technology.
- Islamic Republic of Iran Railways
- Trans-Iranian Railway
- History of rail transport in Iran
- Economic Cooperation Organization
- United Nations Economic and Social Commission for Asia and the Pacific
- "Railway electrification".
- International Tender Advice / Electrification Project of Tehran-Mashhad Double-Track Railway Route along with procuring electrical locomotives of the project
- Tehran - Mashhad electrification project launched
- "Tehran - Mashhad electrification contract". Railway Gazette International. 4 March 2009.
- "Austrians to Construct Persian Gulf Bridge to Connect Qeshm Island to the Main Island". Retrieved 2010-12-27.
- "Motor Vehicle Accident Costs".
Free Railway Electrification book in ARACO library 
PDF free download possible in google site: 
also in raielec group in yahoo:
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