Plain Rheostatic Starting of Traction Motors (Notching): As already mentioned in this plain rheostatic starting method the voltage across the motor is gradually increased from zero to full (normal) voltage and the current is kept…
Starting and Speed Control of DC Traction Motors: Starting and Speed Control of DC Traction Motors - As already discussed, only series and compound dc motors are suitable for traction work. With a dc series…
Negative Booster in Electric Traction: In case of dc traction system, return current flows through the rails, to the substations. So due to this current flow through rails some voltage drop exists along the track.…
Methods of Booster Transformer in Electric Traction: In ac traction system return current mainly flows to the substation through track leaving a small portion, which flows through ground because of leakage of current from track…
Interference in Telecommunication Circuit in Electric Traction: In all traction systems track is used as a return path for the current. Some part of the current flows through the track and the remaining portion of…
Overhead Equipment in Electric Traction Systems: Simplest type of overhead equipment in electric traction systems consists of a single contact wire supported either by bracket or by overhead span. The maximum distance between two consecutive…
Automatic Block Signalling System in Railways: The purpose of automatic block signalling system in railways is to keep trains apart but permit spacing as close as safety permits. For optimum utilization of track capacity with…
Operations of Traction Power Controller (TPC): It is provided to have a comprehensive picture of supply conditions and arrangement to operate switchgear with minimum delay so that continuity of electric supply to the track, which…
Major Traction Substation Equipments: The Major Traction Substation Equipments are namely, traction transformer circuit breakers and interruptor. 1. Traction Transformer Transformers are required to step down the grid supply voltage (220 or 132 kV) to…
Systems of Track Electrification AC Electrification System: As even in single phase electrification, the substations are necessarily required to keep the voltage drop within permissible limits. The type of substations required depends upon the nature…
