Electrical Engineering and Railways
Selection of Traction System Voltage for rail transport
Last updated on February 22nd, 2014 at 01:15 am Many Traction systems have been developed over the period depending on dominant technologies at that time and traffic demand. Traction system for urban, Sub-urban and main line transport developed over the period are at 750V DC, 1500V DC, 25kV AC, 2x25kV and 50kV AC. 750 and […]
Eternal War between Alternating and Direct Current continuing for Rail Transport
Last updated on August 25th, 2017 at 04:28 am AC versus DC is a subject of debate over the century for different applications of power. DC arrived first at the scene of illuminating the house in 1850’s with many patents to the credit of Thomas Edition. The use of AC for power supply distribution taken […]
Re-engineering of Stators of Three phase Traction Motors type 6FRA 6068 used in WAG9/WAP7 locomotives for Improving their Reliability
Last updated on April 5th, 2015 at 06:17 am Research By: R.N.Lal, Senior Executive Director Standards, Ganesh , Director Standards Electrical Directorate , Research Design and Standards Organisation , Lucknow Abstract Insulation and brazed joint failures in the stators of three phase traction motors used in electric locomotives on Indian Railways are primarily on account […]
Selection of Suspension Arrangement of Traction Motors : A Right Approach
Last updated on April 5th, 2015 at 06:16 am Abstract Motor suspension arrangement is of paramount importance for the reliability of traction motors. Another vital input for the selection of traction motor for given motor suspension arrangement is its rotational speed. Non-availability of any complied information on the relationship of rotational speed of traction motors […]
Regeneration in Electric Locomotives with DC Traction Motors : A Strategic Domain
Last updated on April 5th, 2015 at 06:16 am By: Mr R.N.Lal, Senior Executive Director Standards & Mr Ganesh, Director, Standards Electrical Directorate, Research Design and Standards Organisation , Lucknow Introduction Out of all modes of transportation system, only Indian Railways (IR) has been matching with the burgeoning growth of the economy of India by maintaining […]
Over Head Equipment – Foundation
Last updated on April 5th, 2015 at 06:16 am Foundation should be capable to support the vertical load of mast, bending moment due to static and dynamic load of OHE. Foundation design mainly depends on Soil and conditions prevailing at the location. There are certain masts at which OHE contact wire is terminated thus requiring […]
History of Electric Locomotive over Indian Railways
Last updated on November 21st, 2014 at 10:31 am Electric Traction on Indian Railways started with 1500V DC traction and therefore initial Locomotives finding place on Indian Railway maps were only DC Locomotive. The development of locos on Indian Railways thus started. Traction voltage system started from 1500V DC, 3000V DC in Howrah Division of […]
Electric Locomotive
Last updated on April 5th, 2015 at 06:16 am Steam Locomotive has always been a subject of curiosity amongst generation from the time introduced over Indian Railways. Railways have mainly been identified by its rhythm sound most popularly called Chuk-Chuk Jude. With the advancement of technologies led to the introduction of electric and diesel locomotive […]
Specific Energy Consumption of High Speed Rail as compared to Semi-HSR
Last updated on April 5th, 2015 at 06:16 am There is a general belief that the train resistance (resulting high specific energy consumption) of high-speed train is high as compared to normal speed train. The UIC sponsored study proved it otherwise with following arguments explained in the discussion Curve Resistance: High speed Rail routes had […]
2×25 kV Traction System
Last updated on April 5th, 2015 at 06:15 am What is 2×25 kV traction system 2×25 kV traction system means transmission at 50 kV and using at 25 kV voltage system. 50 kV transmission benefits for Improved voltage regulation and reduced transmission line losses Increased Traction Substation spacing Improved Load factor as number of trains […]