13/10 港鐵指，昨日下午5時許藍田站路軌旁懷疑因為 短路 ，引致道岔設備一件絕緣膠起火。港鐵及消防人員隨即到場處理，列車服務在晚上約6時半恢復正常。 when an insulating rubber component in a track turnout caught fire (SCMP) .... 14/10 港鐵表示,今早的事故是由於藍田站的電力設備房,有電線過熱導致冒煙。至於昨晚就是由於道岔設備的絕緣膠短路起火,導致服務受阻。 港鐵車務工程維修副總監李劍雄指出，涉事起火的絕緣膠在今年9月已經進行檢測，亦在 今年3月曾經進行更換 。why? orangenews hk01 video stheadline 潘焯鴻 fb ( doubtful analysis this time) SER signal equipment room: facebook 波口： hkrail fandom typical case: high resistance in electrical connections > high temperature rise in conducting wire > protective insulation overheat > melt > smoke. the insulation material should be flame retardant. but what cause such high resistance? loose mechanical contact? 線耳 nuts and bolts not fully tightened? 線耳 soldering / crimping defect? there should be no high voltages(kilovolt), so electric arc-ing related issues can be eliminated. mtr is using 1500 v dc on the tracks checkerboardhill the arc/fire is likely between the trough wall and the metal rod above. if it is...