CORE
Central Organisation for Railway Electrification
Source note: Prepared exclusively from the official CORE/Indian Railways website on 10.06.2026
1. Background and Historical Development
Railway electrification in India began on 3 February 1925, when the first electric train ran from Bombay Victoria Terminus to Kurla Harbour on a 1,500 V direct-current system. Indian Railways adopted the 25 kV, single-phase, 50 Hz alternating-current system in 1957; the first section electrified on this system was Rajkharswan-Dongoaposi (75 route kilometres) on 11 August 1960.
2. Organisation and Project Units
CORE is headed by a General Manager at Prayagraj. Its multidisciplinary headquarters includes General Administration, Personnel, Signal & Telecommunication, Vigilance, Accounts & Finance, Electrical, Engineering, Rajbhasha, Security and Stores. Field execution is undertaken through Railway Electrification project units, generally headed by Chief Project Directors.
• Nine project units are identified on the latest historical-background page: Ahmedabad, Ambala, Bengaluru, Chennai, Jaipur, Kolkata, Lucknow, New Jalpaiguri and Secunderabad.
• The project-unit model enables simultaneous execution across several Zonal Railways while maintaining common technical standards, centralised planning and coordinated procurement.
3. Core Functions and Scope of Work
CORE does not merely erect overhead wires. Railway electrification is an integrated multidisciplinary project requiring electrical, civil engineering, signalling and telecommunication, stores, finance, personnel, safety and contract-management inputs. Its principal functions include:
1. Project planning: surveying and planning electrification schemes, preparing estimates and execution schedules, coordinating with Zonal Railways and prioritising high-density, highly utilised and strategic connectivity routes.
2. Electrical works: installation of Overhead Equipment (OHE), Traction Sub-Stations (TSS), switching posts, power-supply installations, feeder arrangements, earthing, protection and remote-control systems.
3. Civil engineering works: foundations for masts and portals, modification of bridges and platform structures, construction of traction substations, depots, staff facilities and associated buildings.
4. Signal and telecommunication modifications: altering signalling installations to suit 25 kV alternating-current traction, providing reliable underground/optical-fibre communication and integrating Supervisory Control and Data Acquisition (SCADA).
5. Procurement and contracts: standardisation, tendering and supply of specialised electrification materials such as contact and catenary wire, insulators, transformers, switchgear and OHE fittings.
6. Testing, inspection and commissioning: conducting electrical and safety tests, coordinating statutory inspection by the Commissioner of Railway Safety where required, energising the system and handing over commissioned assets to the operating Zonal Railway.
4. Technical System and Important Components
• Standard traction system: 25 kV, single-phase, 50 Hz alternating-current supply through overhead equipment. Indian Railways adopted this system in 1957.
• 2 × 25 kV Auto-Transformer feeding system: permits effective high-voltage transmission while standard 25 kV locomotives continue to operate; it is especially useful on high-density and heavy-haul routes.
• SCADA: centralised remote control of the traction power network, with real-time monitoring of voltage, current, maximum demand and power factor, and rapid isolation of faulty sections.
• Modern equipment: dry cast-resin transformers, Sulphur Hexafluoride (SF6)/vacuum switchgear, solid-core insulators, Polytetrafluoroethylene (PTFE) neutral sections and self-propelled OHE inspection cars.
• Associated modernisation: colour-light signalling, panel/route-relay or electronic interlocking modifications, underground cables and optical-fibre communication.
5. Strategic Benefits of Railway Electrification
6. Performance and Major Achievements
By June 2026, roughly 99.6% of the Indian Railways broad-gauge network had been electrified. CORE itself had electrified 48,029 route kilometres, representing about 70% of the total electrification work. The organisation also reported 26,441 route kilometres completed during the preceding ten years.
• FY 2022-23 was CORE’s record year: the dedicated official press release reports 4,767 RKM.
• Important connectivity milestones include fully electrified routes to Meghalaya, New Delhi-Bikaner, Bengaluru-Hubballi, Pune-Secunderabad via Latur Road, and additional north-south/west-south corridors.
• On 28 June 2024, the Jaisalmer-Ashapur Gomat section marked completion of the 100% electrification target assigned to CORE by the Railway Board.
7. Examination-Oriented Capsule
8. Practical Interpretation
CORE is a specialised project-construction organisation. It creates and commissions electrification assets and then hands them over to the concerned Zonal Railway for operation and maintenance. Its significance lies in combining centralised standards and expertise with decentralised project execution across India.
Key points for MCQ:
CORE stands for Central Organisation for Railway Electrification
Functions under the Ministry of Railways, Government of India.
Hqrs: Prayagraj,Uttar Pradesh.
Established at Allahabad, now Prayagraj, in 1979.
Full time GM - from 1987
The predecessor of CORE was the PORE - Project Office for Railway Electrification, established at Kolkata in 1961.
The primary function of CORE is the planning, execution, testing and commissioning of railway electrification works.
CORE hands over commissioned electrification assets to the concerned Zonal Railway for operation and maintenance.
The first electric train in India ran between Bombay Victoria Terminus and Kurla Harbour on 3 February 1925.
India’s first electric train operated on a 1,500-volt Direct Current system.
Indian Railways adopted the 25 kilovolt, single-phase, 50 hertz Alternating Current traction system in 1957.
The first section electrified under the 25 kilovolt Alternating Current system was Rajkharswan–Dongoaposi - 75 route km - 1960
Railway Electrification project units are generally headed by Chief Project Directors.
Total Project units - 9 - Ahmedabad, Ambala, Bengaluru, Chennai, Jaipur, Kolkata, Lucknow, New Jalpaiguri and Secunderabad.
SCADA stands for Supervisory Control and Data Acquisition and is used for remote monitoring and control of traction power supply.
The 2 × 25 kilovolt Auto-Transformer feeding system is mainly used on high-density and heavy-haul railway routes.
CORE’s contribution represented approximately 70% of the total railway electrification work in India.
Financial Year 2022–23 was CORE’s record year, with approximately 4,767 route kilometres electrified.
CORE completed the Railway Board-assigned 100% electrification target on 28 June 2024.
The target was completed with the commissioning of the Jaisalmer–Ashapur Gomat section -104 route km
By March 2026, approximately 99.6% of the Indian Railways broad-gauge network had been electrified.
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