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Post by zcap on Apr 14, 2016 3:22:54 GMT
To keep it short, the past few months, Ive noticed that there is intense arcing that occurs at the small gap in the conductor rail next to signal A8400. Any ideas whats causing it to discharge so violently so often? Problems with the rail? Or would it be problems with the section supply? Or something else? Thanks  |
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Deleted
Deleted Member
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Post by Deleted on Apr 14, 2016 5:42:51 GMT
The conductor rail probably wants packing slightly to bring it higher so the shoe don't arc as much on the ramp
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rincew1nd
Administrator
Junior Under-wizzard of quiz
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Post by rincew1nd on Apr 14, 2016 8:48:18 GMT
As this is in a Station, is it linked to trains drawing current when accelerating from a stand or vice versa?
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Post by zcap on Oct 7, 2016 23:23:41 GMT
As this is in a Station, is it linked to trains drawing current when accelerating from a stand or vice versa? Sorry to revive a dead thread, but to answer your question, it, still, is due to trains passing the rail gap at A8400, which causes unusually blindingly bright arcing when a shoe passes over the short rail gap, apparently, indiscriminant of amount of traction drawn. I guess the height of the rail affects the arcing, what do you think. Ill have a look the next time I go to Cannon Street, see what I notice (the scientific method, woo!) |
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roythebus
Pleased to say the restoration of BEA coach MLL738 is as complete as it can be, now restoring MLL721
Posts: 1,275
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Post by roythebus on Oct 17, 2016 20:43:27 GMT
There was an instance of intermittent arcing in that area back in the early 1970's, sometimes blowing the circuit breakers out. The cause was found to be the head of an elderly lady who had inadvertantly fallen between the cars (no safety barriers in those days) and her head was laying between the positive rail and the running rail.
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class411
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Post by class411 on Oct 18, 2016 12:08:39 GMT
There was an instance of intermittent arcing in that area back in the early 1970's, sometimes blowing the circuit breakers out. The cause was found to be the head of an elderly lady who had inadvertantly fallen between the cars (no safety barriers in those days) and her head was laying between the positive rail and the running rail. As this thread hasn't been locked or deleted, I'll make a comment, here. This sounds very much like an urban legend, for several reasons, including: 1) Didn't anyone notice a headless body? 2) Why would a a fairly high resistance item, like a head, cause arcing? 3) How do you get a relatively low voltage such as LU use to arc without breaking a high current circuit. I'm not going to go into detail about all the gruesome things that would happen if a head was passing enough current to trip circuit breakers - suffice to say that it would be pretty visible (given that people seemed to notice the arcing) and generate quite a smell It seems so unlikely that it could just be true! |
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Post by whistlekiller2000 on Oct 18, 2016 12:53:17 GMT
As a general rule and for future reference, threads are locked after 6 months of inactivity. Even then, they can be unlocked for response subsequent to this by request to an admin or mod.
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class411
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Post by class411 on Oct 18, 2016 13:00:56 GMT
As a general rule and for future reference, threads are locked after 6 months of inactivity. Even then, they can be unlocked for response subsequent to this by request to an admin or mod. Erm, yes, I was alluding to the subject matter of the post to which I referred. Whilst not about a one under the situation had similar characteristics. I was just pointing out that I had waited to see if there would be any moderator action before replying. |
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Post by whistlekiller2000 on Oct 18, 2016 14:10:11 GMT
As a general rule and for future reference, threads are locked after 6 months of inactivity. Even then, they can be unlocked for response subsequent to this by request to an admin or mod. Erm, yes, I was alluding to the subject matter of the post to which I referred. Whilst not about a one under the situation had similar characteristics. I was just pointing out that I had waited to see if there would be any moderator action before replying. |
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class411
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Post by class411 on Oct 18, 2016 17:52:53 GMT
Erm, yes, I was alluding to the subject matter of the post to which I referred. Whilst not about a one under the situation had similar characteristics. I was just pointing out that I had waited to see if there would be any moderator action before replying. My apologies. I overlooked the post that said "sorry to resurrect a dead thread", so didn't realise that my saying it wasn't locked looked as if it was a query/criticism or some-such. As I said, I was purely pointing out that I was unsure that the topic of the post to which I responded was acceptable. |
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Post by whistlekiller2000 on Oct 18, 2016 18:15:43 GMT
I was explaining why the thread hadn't been locked for general guidance, hence me not quoting you. There was no need for a response to my post and certainly not one starting with "Erm yes". Avoid. My apologies. I overlooked the post that said "sorry to resurrect a dead thread", so didn't realise that my saying it wasn't locked looked as if it was a query/criticism or some-such. As I said, I was purely pointing out that I was unsure that the topic of the post to which I responded was acceptable. |
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Post by whistlekiller2000 on Oct 19, 2016 12:00:20 GMT
EDIT: I've locked this as it's heading nowhere apart from grief.
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