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Central Organisation for Railway Electrification
TypeSubsidiary of Indian Railways
IndustryRailways, electrification
Area served
Key people
Ashwini Vaishnaw (Railway Minister)
Vinay Kumar Tirupati(Board Chairman)
ProductsRailway electrification
OwnerIndian Railways

The Central Organisation for Railway Electrification (CORE) is an organizational unit of Indian Railways responsible for railway electrification of the Indian Railways network. The organisation, founded in 1979,[1] is headquartered in Prayagraj, Uttar Pradesh, India. Project units operate in Ambala, Bangalore, Chennai, Secunderabad, Lucknow, Ahmedabad, Jaipur, Danapur, and New Jalpaiguri.

CORE headquarters has Electrical, Signal and Telecommunications (S&T), Civil Engineering, Stores, Personnel, Vigilance and Finance departments. Railway Electrification project units, which are headed by Chief Project Directors.

Indian Railways has electrified 52,247 Route kilometers (RKM) that is about 80% of the total broad gauge network of Indian Railways (65,414 RKM, including Konkan Railway) by 31 March 2022[1] It is planned to electrify all routes of the Indian Railways network by 2024.[2] The entire electrified mainline rail network in India uses 25 kV AC; DC is used only for metros and trams.


1500 V DC

Railway electrification in India began with the first electric train (1500 V DC), between Bombay Victoria Terminus and Kurla on the Great Indian Peninsula Railway's (GIPR) Harbour Line, on 3 February 1925. Steep grades on the Western Ghats necessitated the introduction of electric traction on the GIPR to Igatpuri on the North East Line and to Pune on the South East Line. 1500 V DC traction was introduced on the suburban section of the Bombay, Baroda and Central India Railway between Colaba and Borivili on 5 January 1928, and between Madras Beach and Tambaram of the Madras and Southern Mahratta Railway on 11 May 1931, to meet growing traffic needs. The last sections of 1500 V DC in India, from Chhatrapati Shivaji Terminus, Mumbai to Panvel and Thane to Vashi, were upgraded to 25 kV AC in April 2016.[citation needed]

3000 V DC

The electrification of the Howrah-Burdwan section of the Eastern Railway zone at 3000 V DC was completed in 1958. The first 3000 V DC EMU service began on the Howrah-Sheoraphuli section on 14 December 1957. The last section of 3000 V DC in India, from Howrah to Burdwan, was upgraded to 25 kV AC in 1968.[citation needed]

25 kV AC

Main article: 25 kV AC railway electrification

The 25 kV AC system emerged as an economical form of electrification as a result of research and trials in Europe, particularly on French Railways (SNCF). Indian Railways decided to adopt the 25 kV AC system of electrification as a standard in 1957, with SNCF their consultant in the early stages, later taken over by the "50 c/s Group". The joint venture was founded in 1954 by several European railway manufacturers and was dedicated to the development and construction of locomotives powered by 50 Hz alternating current. It arranged the supply contracts for the WAM-1, WAG-1 and WAG-3 locomotives and its spare parts.[citation needed]

The first section electrified with the 25 kV AC system was Raj Kharswan–Dongoaposi, on the South Eastern Railway zone, on 15 December 1959 and first electric train run. The first 25 kV AC EMUs, for Kolkata suburban service, were introduced in September 1962.[citation needed]


The electrification office was established in Calcutta as Project Office for Railway Electrification (PORE) in 1951, when electrification of the Howrah–Burdwan section of the Eastern Railway was begun. A general manager headed the Railway Electrification Organisation, established in Calcutta in 1959. In 1961, the Northern Railway zone electrification office (headed by an engineer-in-chief) was established in Allahabad for the electrification of the MughalsaraiNew Delhi section. In accordance with the 1978 J. Raj Committee report, a number of electrification projects were included and a railway-electrification headquarters established. Since most of the electrification projects were in Central and South India, the electrification headquarters was established in Nagpur under an additional general manager from 1982 to 1984. The headquarters was moved to Allahabad under the additional general manager in January 1985 and was renamed Central Organisation for Railway Electrification (CORE). A general manager was appointed in July 1987.[citation needed]

Electrification progress

Electrification of Indian railways [1925-2022][3][4][5][6]
Period Electrification (rkm) Dismantled (rkm) Cumulative (rkm)
1925-1947 388 - 388
1947-1956 141 - 529
1956-1961 216 - 745
1961-1966 1,678 - 2,423
1966-1969 814 - 3,237
1969-1974 953 - 4,190
1974-1978 533 - 4,723
1978-1980 195 - 4,918
1980-1985 1,522 - 6,440
1985-1990 2,812 - 9,252
1990-1992 1,557 - 10,809
1992-1997 2,708 - 13,517
1997-2002 2,484 - 16,001
2002-2007 1,810 - 17,811
2007-2008 502 168 18,145
2008-2009 797 - 18,942
2009-2010 1,117 - 20,059
2010-2011 975 - 21,034
2011-2012 1,165 - 22,199
2012-2013 1,317 - 23,516
2013-2014 1,350 - 24,866
2014-2015 1,176 - 26,042
2015-2016 1,502 - 27,544
2016-2017 1,646 - 29,190
2017-2018 4,087 - 33,277
2018-2019 5,276 - 38,553
2019-2020 4,378 - 42,931
2020-2021 6,015 - 48,946
2021-2022 6,366 - 55,312


See also: Future of rail transport in India


To reduce maintenance costs and improve the reliability of power-supply systems, CORE has adopted state-of-the-art technology: cast resin transformers, SF6 circuit breakers or vacuum switchgear, long-creepage solid-core insulators and PTFE-neutral sections. Eight-wheeled, self-propelled OHE inspection cars have been introduced to improve maintenance, and an OHE recording car has been requested to monitor the performance of overhead equipment.[citation needed]


The 220-132-25 kV power-supply network for electrification extends along the track for about 200 to 300 kilometres (120 to 190 mi). It is remotely controlled from the division control centre to ensure an uninterrupted power supply to the track overhead equipment. In electrification projects, a microprocessor-based supervisory control and data acquisition control system is replacing the earlier electro-mechanical Strowger system of remote-control equipment. SCADA can telemeter voltage, current, maximum demand and power factor on a real-time basis, enabling control of maximum demand and electrical cost. The system also provides automatic troubleshooting and isolation of faulty sections.[citation needed]

Other organisations involved in electrification

Some electrification projects have been entrusted to other agencies like RVNL (2624 RKM), IRCON (170 RKM), PGCIL (597 RKM) and RITES (170 RKM) under the Ministry of Railways and small electrification projects are carried out by zonal railways.[citation needed]

See also


  1. ^ a b c "Home page", Central Organisation for Railway Electrification, Ministry of Railways, Government of India, retrieved 24 May 2021
  2. ^ "Mission Electrification to save railways power bill by Rs. 13.51k crore". The New Indian Express. 4 November 2016. Retrieved 6 November 2016.
  3. ^ "Indian Railways" (PDF). Retrieved 21 February 2022.
  4. ^ "Indian Railways" (PDF). Retrieved 21 February 2022.
  5. ^ "Financial Express". Retrieved 21 February 2022.
  6. ^ "Major achievements of Indian Railways in Financial Year -2021-22". Retrieved 1 April 2022.