It might be surprising to know that in electric trains, the power collected from the overheadlines ends up in the grounding cable of the track after flowing through the wheels. Three phase power conversion, regenerative braking and zig-zag overheadlines – all these make electric train technology quite unique. Let’s understand all the engineering secrets behind the electric trains starting from the simplest design possible.
Video Credits: https://www.youtube.com/watch?v=GJbUI2D3rLY
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Excellent, Marvelous
How does Metrorail trains operate? There's no engine room. All 6 or 8 carriges are for passengers.
Synchronizing the AC phases to motor speed is why they play musical sounds while accelerating.
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I understood everything except 3 phase ac current
So if the feeding is 25kv, is that possible to transfer voltage by arching so pantograph will not touch the line? Thank you anyone answers.Other question would 25kv a bit dangerous for maintenance persons?
Generally not a bad video, but as Klukanda states below, the description of brakes was not really correct. Air braking is applied by air pressure in the piston brake cylinder. Many locomotives and carriages have spring applied park brakes in addition, but usually not on every axle. They are used when the train is parked, because the air pressure in the cylinders may gradually leak away.
Don't they have ac engines now?
I thought this video explain power supply through rail and not overhead line.
I'm just confused if there's really current flowing through the Rails, why don't I get zapped or electrocuted when I touch it with barehands and not wearing any footwear, while also only few meters away from the train itself? (It was parked but all systems On)