Abstract:An overhead rigid conductor line in a tunnel is free from the fear of disconnection because the contact wire is not tensioned, and it is superior in maintenance saving. In order to introduce this in open sections, we have developed “a long‐span‐type overhead rigid conductor line of catenary system.” This contact line structure consists of a contact wire of no tension attached to a supporter that has a small drag coefficient suspended from the messenger wire. We have now developed a “square supporter” to make t… Show more
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