How electric train works in single wire?
Pantograph is an apparatus which mounted on the roof of electric train to collect power through with an overhead tension wire. It lift or down on the basis of the wire tension. Typically a single wire is used with the return current running through the track. It is a common type of current collector.
How do overhead power lines work on trains?
It presses against the underside of the lowest overhead wire, the contact wire. Current collectors are electrically conductive and allow current to flow through to the train or tram and back to the feeder station through the steel wheels on one or both running rails.
Why do electric locomotives have two pantographs?
This is because DC can only provide low voltage electric, to increase the power (output) of the locomotive, the current (A) have to be higher. However, if the current is too high, the fuse will broken. In order to reduce this risk, both pantographs will up.
How does the third rail work?
A third rail, also known as a live rail, electric rail or conductor rail, is a method of providing electric power to a railway locomotive or train, through a semi-continuous rigid conductor placed alongside or between the rails of a railway track. Third rail systems are always supplied from direct current electricity.
Will touching the third rail kill you?
But if you somehow end up on the tracks, the key is to avoid the third rail, which pumps out 600 volts of electricity. One touch can electrocute you–and potentially kill. “They should immediately return to the platform without touching any rails if they are able to do so,” Ziegler advised.
Why is the third rail dangerous?
The third rail is probably one of the most difficult dangers to see. It looks just like an ordinary rail, but it carries 750 volts – easily enough to kill you. The DC current that flows through is three times as powerful as your home electricity.
How many people have died from the third rail?
In addition, 11 people were electrocuted by the 600-volt third rail that sits alongside the tracks of the 224.1-mile CTA system. Thirty-three of the 52 total deaths were either attributed by police to suicide or suspected suicides, authorities said.
What happens if you touch a live rail?
The electricity is so strong that if you touch the rail, you will be seriously injured or killed. – The third rail and overhead lines have electricity flowing through them at all times and are never switched off. – Electricity in overhead lines can ‘jump’. You don’t have to touch the overhead lines to get electrocuted.
How many KW is a lightning bolt?
The average lightning bolt has about 250 kilowatt-hours of electricity, but the average house uses 914 kilowatt-hours per month.
Is a lightning bolt AC or DC?
Second, lightning is a direct current (DC) that would require it to be converted to alternating current (AC) so it could be used for lights and other equipment.
Why do we use AC power instead of DC?
Since high voltages are more efficient for sending electricity great distances, AC electricity has an advantage over DC. This is because the high voltages from the power station can be easily reduced to a safer voltage for use in the house. Changing voltages is done by the use of a transformer.