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Post by Deleted on Apr 10, 2005 16:05:02 GMT
I heard BAET say a while ago that the junction proving circuitry in VK IMR for the Picc->Vic link has extra bits that make the trainstop stay up when a diverging route is set.
Is the same circuit provided for the Vic->Picc link as well? And just out of curiosity, what does it look like?
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Tom
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Post by Tom on Apr 10, 2005 18:13:33 GMT
It's more the opposite as it happens.
Been a while since I worked there, but as I remember it VK11 controlling the Vic to Picc junction has a trainstop. If a train is to change lines, on arrival at the stopping point and with a call on VK11 rte 2 No7 lever is reversed to illuminate a 'Cut in tripcock and draw up to signal' sign. In drawing up to the signal, the train passes over a tripcock tester and assuming the test is passed, No 10 points reverse, 11 signal lever reverses, and the signal should clear and trainstop lower.
What the trainstop does for route 1 I don't know, but I would expect for both VK2 and VK11 the only difference from a standard circuit is that a contact of 10 RWKR (Reverse Point Indication Relay) is used after 11GR's contact in the feed to 11V, and likewise 3 NWKR is used for 2V.
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Post by Deleted on Apr 10, 2005 18:25:43 GMT
It's more the opposite as it happens. Been a while since I worked there, but as I remember it VK11 controlling the Vic to Picc junction has a trainstop. If a train is to change lines, on arrival at the stopping point and with a call on VK11 rte 2 No7 lever is reversed to illuminate a 'Cut in tripcock and draw up to signal' sign. In drawing up to the signal, the train passes over a tripcock tester and assuming the test is passed, No 10 points reverse, 11 signal lever reverses, and the signal should clear and trainstop lower. Interesting. I assume then that the Picc starter is interlocked with No.7 lever and No.11 lever? What the trainstop does for route 1 I don't know, but I would expect for both VK2 and VK11 the only difference from a standard circuit is that a contact of 10 RWKR (Reverse Point Indication Relay) is used after 11GR's contact in the feed to 11V, and likewise 3 NWKR is used for 2V. Er.... That's just a bunch of acronyms and stuff - I was hoping for a diagram  |
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Tom
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Post by Tom on Apr 10, 2005 18:30:01 GMT
Give me a week or so... they may start questioning why I'm photocopying odd bits of bookwirings for sites I'm not working on.
(At least in the new job I can get copies)
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Tom
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Post by Tom on Apr 13, 2005 17:53:37 GMT
Update time: There isn't a trainstop on VK11.
However, there is a fixed one south of the crossover towards Highbury.
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Post by Deleted on Apr 13, 2005 18:26:37 GMT
Update time: There isn't a trainstop on VK11. However, there is a fixed one south of the crossover towards Highbury. VK11 is the Vic->Picc junction signal, right? |
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Tom
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Post by Tom on Apr 14, 2005 20:52:43 GMT
Yes.
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Post by Deleted on Apr 14, 2005 21:17:33 GMT
So the junction is protected then by the tripcock tester, which as you said must test cleanly in order to allow the points to be reversed? |
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Tom
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Post by Tom on Apr 14, 2005 22:01:28 GMT
I guess so, remembering that if the test is failed the train op would just cut the CTV back in and go to Highbury, reverse and return to Northumberland Park.
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