Traction Distribution
Overhead Equipment – Section Insulator
Last updated on April 5th, 2015 at 06:18 am Section Insulator is a device installed along with the contact wire for insulating two elementary sections where the pantograph of the locomotive negotiates smoothly and maintaining the current continuity. It is used in crossover, turnouts, maintenance pits and yard line, etc. During movement of locomotive pantograph, […]
Overhead Equipment – Overlaps
Last updated on April 5th, 2015 at 06:18 am In electrical circuit, the series and parallel connections are made using junction box, twisted of cables together, soldering, brazing, etc. This is not possible in case of overhead contact and catenary wire. Similar purpose in OHE is achieved through overlaps. Overlap is defined as an arrangement where […]
Over Head Equipment – Neutral Section
Last updated on April 5th, 2015 at 06:18 am Electrical power is generated in three phases with each phase having a phase shift of 1200. The utility power supply system also expects equal loading on all phases. Traction power system works on single phase 25kV traction system. It now becomes important to use all the […]
Over Head Equipment – Cantilever
Last updated on April 5th, 2015 at 06:17 am Cantilever hold the assembly of contact wire , catenary and dropper assembly. It transfers all vertical load, lateral forces and bending moment load through insulator to Mast. It is an insulated swiveling type structural member and keeps the overhead catenary system in a position assisting smooth […]
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 […]
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 […]
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 […]
Return Conductor and Booster Transformer
Last updated on September 6th, 2013 at 03:18 pm A current carrying conductor produces its own magnetic field around it. This magnetic field varying with time induces an electro – motive force (emf) in a conductor parallel to the current carrying conductor. This induced emf disturbs the communication and signalling line and while undertaking electrification works, precautions are […]
25kV Traction Power Supply System
Last updated on April 5th, 2014 at 08:58 am 25 kV Single Phase is the most preferred and universally accepted voltage standard for overhead traction system. Looking for any other voltage system, means every things has got to be developed namely traction power supply system, Over Head Equipment, vehicle traction system etc. In order to increase OHE voltage. 2×25 […]