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Question:

Why can the single phase of catenary be used? Why is rail used as loop without electricity?

Why can the single phase of catenary be used? Why is rail used as loop without electricity?

Answer:

In addition, there are different signals in different places, and the signals on the rails are differentThe most basic electrified railway, there is a track voltage between the two rails, in addition to the code, etc., and now there are a lot of station information is also sent to the locomotive by rail
Commonly used FireWire, relative to the earth, there is voltage, so people standing on the ground will feel electric shock, when standing on the insulating object, it will not get an electric shockIsolated 220V, standing on the ground and touching one of them has nothing to do with it
The rail is electrically opposed to the contact net, not the ground, so you don't get an electric shock when you touch the railsYou get an electric shock when you touch the catenary and the rail at the same time

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