Table of Contents
What are booster transformers?
Booster transformer is one which is often used towards the end of a power line to raise the voltage to the desired value. It is used for controlling the voltage of a feeder at a point far away from the main transformer. Booster transformer is used in railways for eliminating the flow of stray current.
How do booster transformers work?
Booster transformers are used to eliminate the stray currents and the disturbances, obliging the return current to flow to the return conductor. The secondary of the booster transformer is connected in series with the line, and its primary is supplied from the secondary of the regulating transformer.
How auto transformer is different from two winding transformers explain the principle of operation of an auto transformer?
An auto transformer has higher efficiency than two winding transformer. This is because of less ohmic loss and core loss due to reduction of transformer material. Auto transformer has better voltage regulation as voltage drop in resistance and reactance of the single winding is less.
What is booster transformer in railway?
Booster transformers are used in electric railway AC catenary feeders to collect the return current from the rails and the earth to the return conductor. Booster transformers are used to eliminate the stray currents and the disturbances, obliging the return current to flow to the return conductor.
What is series booster?
Answer: Booster is low voltage high current series wound DC generator inserted into a DC circuits to add or inject a certain voltage proportional to the circuit current. The main purpose of providing booster in power system is to compensate the voltage drop of feeder.
What is functional difference between an autotransformer and normal two winding transformer?
Autotransformer is a transformer having only one winding, a part of which acts as a primary and the other as a secondary. Two winding Transformer is a static machine which transfers electrical energy from one end to another without changing frequency. Autotransformer has only one winding wound on a laminated core.
What is a 2 winding transformer?
Winding – Transformers have two windings, being the primary winding and the secondary winding. The primary winding is the coil that draws power from the source. The secondary winding is the coil that delivers the energy at the transformed or changed voltage to the load.
Where are booster transformers used?
Booster transformers are used in electric railway AC catenary feeders to collect the return current from the rails and the earth to the return conductor.
How the booster is connected with the feeder?
A booster is a DC generator whose function is to inject or add certain voltage into a circuit so as to compensate the IR drop in the feeders etc. For exact compensation of voltage drop, the booster must be marked on the straight or linear portion of its voltage-current characteristics. …
How are trains powered by overhead power?
Overhead line electrification equipment, which supplies electric power to the trains. Each length of the contact wire overlaps with the next so that the pantograph slides smoothly from one to the other. The device on top of the train that collects electric current from the contact wire to power the train.
What is OLE (overhead line equipment)?
Overhead Line Equipment – or OLE – is the name railway engineers give to the assembly of masts, gantries and wires found along electrified railways. All this steel and cable has only one purpose – to supply power to make electric trains move.
What is 3rd rail electrification?
Railway electrification system using a third rail located alongside the track to supply DC power to the trains. No longer permitted for new installations on national railways. 2.0 Defi nitions Catenary Pull-off arm (goose neck) Swivel fastening 3.0 Why electrify? Why electrify? 3.0
How does an electric train motor work?
Masts and gantries support the overhead wire carrying the power – the contact wire. The power is transmitted from the contact wire to the train by a sprung ‘pantograph’, which is attached to the roof of the moving train. In the train, the current is used to drive the motors with the aid of on-board controllers.