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Electrical Engineering and Railways

Selection of Suspension Arrangement of Traction Motors : A Right Approach

By on December 10, 2014
Selection of Suspension Arrangement of Traction Motors : A Right Approach

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 and their mounting arrangement makes the jobs of Rolling […]

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Multiple Choice Question on Basic Concept of Science Class X Standard Practice Test 2

By on November 28, 2014

Electrical Engineering and Railways

By on October 31, 2014
Electrical Engineering and Railways

Electrical Engineering is the field of the study of generation, transmission, distribution and use of electrical energy. Electrical Engineering in Railways made its beginning with the responsibility of illumination and ventilation at Railway stations, offices and residential complex and water supply. Thereafter, illumination of passenger carriages with a self generating mechanism added to the responsibility. […]

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‘EARTHING’, a must for every one to understand its importance for Electrical Safety

By on September 21, 2014
‘EARTHING’, a must for every one to understand its importance for Electrical Safety

The word ‘earthing’ is used in UK whereas ‘grounding’ in US but meaning the same. Earthing has a significance in electrical engineering to the fact that earth has very high capacitance of .0007 F, a very high value assuming it be infinity, and not to cause any potential change (V=Q/C) when gaining or loosing even enormous […]

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What is Electricity, Drift Velocity and Electric Current?

By on August 9, 2014
What is Electricity, Drift Velocity and Electric Current?

Electricity is flow of free electrons and also called flow of charge. While doing so, it does work and has been made use during the last two centuries by scientists and engineers to help mankind. Electronic charge can be made to flow under the action of magnetic field associated with motion called electric generator, chemical […]

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Weight Transfer during Braking

By on June 5, 2014
Weight Transfer during Braking

On application of brakes on the vehicle, inertia forces are set up. The braking force is applied at lesser height whereas the vehicle load is at a higher height, resulting a couple to act on the body of the vehicle. This results an additional loading on leading bogie as compared to trailing bogie. Let H […]

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Overhead Equipment – Section Insulator

By on March 29, 2014
Overhead Equipment – Section Insulator

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, it first passes over the runner and smoothly glides […]

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Overhead Equipment – Overlaps

By on March 29, 2014
Overhead Equipment – Overlaps

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 two set of contact wire runs together in parallel […]

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Over Head Equipment – Neutral Section

By on March 25, 2014
Over Head Equipment – Neutral Section

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 three phases equally and convert them into one phase […]

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Over Head Equipment – Cantilever

By on March 23, 2014
Over Head Equipment – Cantilever

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 current collection by the pantograph at the designed speed. […]

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