PROBLEM TO BE SOLVED: To provide a power distribution cable which is installed along an orbit for feeding electric power to a traffic apparatus or the like and which can secure conduction even if it is burnt by a wayside fire without requiring time and cost.SOLUTION: There is provided a power distribution cable 100 comprising: a conductor 1; an insulation layer 3 applied to the outside of the conductor 1; and a shield layer 2 applied to the outside of the insulation layer 3. Further, a fire-resistant layer 2 having a thickness of above 2.2 mm is applied to a space between the conductor 1 and the insulation layer 3. Thus, the fire resistant layer 2 is not subjected to insulation breakdown even after it is burnt by a wayside fire, so that a short-circuit between the conductor 1 and the shield layer 4 is not caused.
【課題】軌道に沿って配設され、信号機等へ電力を供給する配電ケーブルにおいて、手間とコストをかけることなく、沿線火災により焼損した後も通電を確保できるようにする。【解決手段】配電ケーブル100は、導体1と、導体1の外側に施す絶縁層3と、絶縁層3の外側に施す遮蔽層4と、を備えている。そして、導体1と絶縁層3との間に、厚さ2.2mm超の耐火層2が施されている。こうすれば、沿線火災によって焼損した後であっても、耐火層2が絶縁破壊されないので、導体1と遮蔽層4との短絡が生じなくなる。【選択図】図2
POWER DISTRIBUTION CABLE AND SIGNAL SYSTEM
配電ケーブルおよび信号システム
2015-08-20
Patent
Elektronische Ressource
Japanisch
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