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Post by dave1 on Jan 24, 2017 8:57:59 GMT
I have done a search but can't find the thread so I will ask the question. I have been sent a photo of what looks like an equipment room diagram, in the diagram are all sorts of indications but something stuck out No 2 points like all the others normal or reverse but there was an additional indication 2WLR normal or reverse. There were no other indications for any other points so why only these points.
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Post by Nortube on Jan 24, 2017 11:35:55 GMT
RT will come along with the answer  It sounds as if 2WLR is a relay position indication. I'm not sure where I saved RT's list of codes and I can't remember what W stands for, but I assume 2WLR relates to a Locking Relay for 2 points? |
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Post by dave1 on Jan 24, 2017 14:04:30 GMT
I had a look but was unable to find. I should have said there were indications for all the other points that is normal & reverse but it was only No 2 points that had the WLK, there was nothing for any other points.
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Post by railtechnician on Jan 25, 2017 16:23:13 GMT
You're right, here I am having just posed a question about NR SR electrical interference!
Dave you don't say what site the diagram is for but anyway I digress.
The clues are there just from your few words! Firstly you say only 2W have a WLR so that suggests a later installation, either a brand new turnout, crossover etc or an existing one upgraded to the newest technology at the time. Clamplock points have the point and lock detections separated, thus you'll see both WLR and WKR relays and both WL and WK indications on the diagram. 4', 6', and Chairlock point layouts detect both point and lock conditions on a WKR (or KLPR in much older installations).
Of course since I retired there are new points on the network, the latest being surelocks but also HW1000s and another type the name of which escapes me. I don't know about the circuitry in these later points so I cannot comment, it would be nice if someone could tell us what circuitry is used for those.
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Post by dave1 on Jan 26, 2017 15:14:34 GMT
You're right, here I am having just posed a question about NR SR electrical interference! Dave you don't say what site the diagram is for but anyway I digress. The clues are there just from your few words! Firstly you say only 2W have a WLR so that suggests a later installation, either a brand new turnout, crossover etc or an existing one upgraded to the newest technology at the time. Clamplock points have the point and lock detections separated, thus you'll see both WLR and WKR relays and both WL and WK indications on the diagram. 4', 6', and Chairlock point layouts detect both point and lock conditions on a WKR (or KLPR in much older installations). Of course since I retired there are new points on the network, the latest being surelocks but also HW1000s and another type the name of which escapes me. I don't know about the circuitry in these later points so I cannot comment, it would be nice if someone could tell us what circuitry is used for those. The diagram is of Earls Court, I could not post the photo as the person said no but I have found a photo. Diagram The diagram is before they put the new crossover in so may have changed as I am sure they have put in surelocks. RT thanks for the explanation I am clearer on those indications. |
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