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Post by hellocontrol on Aug 12, 2013 9:57:36 GMT
An LJR do, I can not find my signalling alphabet and nothing found on line.
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Post by railtechnician on Aug 12, 2013 12:45:55 GMT
An LJR do, I can not find my signalling alphabet and nothing found on line. L = Lock/Locking J = Time Element R = Relay Locking Time Relay, usually a 4.5 or 15 second delay following an action that completes its circuit (i.e. track proved down or up for the given period) before releasing the backlock of a route.
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Post by hellocontrol on Aug 12, 2013 14:00:08 GMT
An LJR do, I can not find my signalling alphabet and nothing found on line. L = Lock/Locking J = Time Element R = Relay Locking Time Relay, usually a 4.5 or 15 second delay following an action that completes its circuit (i.e. track proved down or up for the given period) before releasing the backlock of a route. RT many thanks the JR bit I knew was normally time relay but did not think the obvious for L and I still have not found that alphabet.
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Post by railtechnician on Aug 12, 2013 16:08:16 GMT
L = Lock/Locking J = Time Element R = Relay Locking Time Relay, usually a 4.5 or 15 second delay following an action that completes its circuit (i.e. track proved down or up for the given period) before releasing the backlock of a route. RT many thanks the JR bit I knew was normally time relay but did not think the obvious for L and I still have not found that alphabet. When you find it, it may not be as helpful as you would hope! Consider WJ seen on many fuse bay labels in older relay rooms usually in the form WJ1 and WJ1A appended to point designations. The J has nothing to do with TIME but means LOCK 'in old money' as I like to say, the modern equivalent being WL1 and WL1A. As for L it can of course also mean Lever as in LO (Lever Operation) Board but beware because O stands for Resistor and LO is a valid designation for resistors in a relay room. Beware 'standards' because they contain exceptions and ambiguities which can trip up the untrained. Signalling can be a 'tin of worms' and nothing can be taken for granted even though it be taught as 'gospel' !!!
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Post by WLX568 on Aug 19, 2013 22:02:16 GMT
I always wondered if WJ came from the days when the point groundlock was an electrically operated one instead of a pneumatic one. It would then make some sort of sense if we consider the J to be a suffix letter, and thus a rectifier. The .1 and .1A in a fuse name referred to the number of contacts left to go until the load and whether or not the path was direct or alternate. An example being where an auto signal GR was inside a room but the red light went over the trainstop out of the room and back in again, the fuses would be RE.1A and RE.A. Here's an example from a job I worked on, the upper fuse is 113 GQ.5 and the second from top is 113 GQ.4. In this case the feed came in on the GQ.5, ran over one contact to the GQ.4 fuse, then over four more contacts to the GQ coil itself.
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Post by WLX568 on Aug 19, 2013 22:07:58 GMT
Beware 'standards' because they contain exceptions and ambiguities which can trip up the untrained. Signalling can be a 'tin of worms' and nothing can be taken for granted even though it be taught as 'gospel' !!! Oh yes, like JNSR: Timing Release Stick Relay, or Timing Normal Stick Relay? I'd go with the latter as 'N' for release should only ever be a last letter, and the old JN busbars went dead when the release was not normal, but I know of others who'd disagree.
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