What railway tracks are also live?
The power supply technology is adopted in many cities abroad and in China, with the advantages of beautiful appearance, no visual obstacles of the electric pole and power supply line, and low maintenance cost. The supply rails are usually equipped with protective covers.
The train rail itself will take this as a weak current signal return train communication, its voltage is the human body do not feel the signal through the wheel to rail to train, car drivers can tell the recent feedback before and after the train distance, and prevent rear end crash.
Electric train (including high-speed rail, train) divided suspended catenary power supply and third rail power supply and traction power supply system of metro train (contact rail power supply), refers to the orbit of charged third rail power supply, power supply rail in parallel with the track, so that the third rail supply rail train through the compartment below the shoe contact the track, get the power to the drive train walking motor running, then drive the train.
