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Why electrified railway to use coaxial cable?

Information Source:Henan Huadong Cable Co., Ltd  Release date:2014-02-20

Why electrified railway to use coaxial cable. Instead of using ordinary dual core cables or overhead wires?

Electrified railway by overhead wire and connected with the rail more power cable. Unlike the tram by overhead wire and rail power supply. Power supply of electrified railway can make the most of current flowing in a coaxial cable, so that the current flowing through the overhead conductor rails and as small as possible. Since the coaxial cable foreign does not present electromagnetic field. Impedance small, small to base on the outside of the electromagnetic interference and the energy loss of the dual core cable ordinary and overhead conductors was not up to requirements. So, electrified railway using coaxial cable.

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