Deleted
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Post by Deleted on Nov 16, 2010 15:28:33 GMT
The reopened East London Line (on London Overground) still retains tunnel telephone wires which, I assume, serves the same purpose as hitherto. Do drivers carry a handset, or is the equipment in-built on the class 378 trains?
Any ideas, please?
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Chris M
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Post by Chris M on Nov 17, 2010 10:06:32 GMT
We had a short discussion about TT wires on the ELL in another thread recently (probably in the London Overground board). I don't recall it answering this question but it might be worth looking it up as my memory isn't perfect!
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Colin
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Post by Colin on Nov 17, 2010 11:07:14 GMT
Indeed - this thread belongs in LO strictly speaking, so this is where it now resides....plus it'll give more chance of getting an answer if it's in the right place  |
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Deleted
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Post by Deleted on Nov 17, 2010 12:39:34 GMT
The reopened East London Line (on London Overground) still retains tunnel telephone wires which, I assume, serves the same purpose as hitherto. Do drivers carry a handset, or is the equipment in-built on the class 378 trains? Any ideas, please? The tunnel telephone system is still in place on the ELL between Whitechapel and Surrey Quays (although it is only used as a last resort of communication should both the GSM-R and SPT fail or to isolate the third rail in an emergency). There is a handset located in each driving cab. |
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Post by railtechnician on Nov 17, 2010 14:20:55 GMT
The reopened East London Line (on London Overground) still retains tunnel telephone wires which, I assume, serves the same purpose as hitherto. Do drivers carry a handset, or is the equipment in-built on the class 378 trains? Any ideas, please? The tunnel telephone system is still in place on the ELL between Whitechapel and Surrey Quays (although it is only used as a last resort of communication should both the GSM-R and SPT fail or to isolate the third rail in an emergency). There is a handset located in each driving cab. That's interesting but as you mention T/T being a last resort comms system is it correct to assume that, if necessary, removal of traction current is normally by use of SPT? From memory ISTR this was/is the method employed to remove traction from OHLE on Network Rail. For NR underground tunnels I recall the pinch wire system being similar to although different from the LU T/T system. Is ELL tunnel section traction still supplied from the LU substations? |
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Deleted
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Post by Deleted on Nov 17, 2010 16:15:36 GMT
I am fairly sure that Surrey Docks substation was closed after the (LU) East London Line closed. The building still stands, however, or at least did a couple of weeks ago. Despite the nearby station being renamed Surrey Quays, the substation remained known as Surrey Docks.
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North End
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Post by North End on Nov 17, 2010 20:17:51 GMT
I am fairly sure that Surrey Docks substation was closed after the (LU) East London Line closed. The building still stands, however, or at least did a couple of weeks ago. Despite the nearby station being renamed Surrey Quays, the substation remained known as Surrey Docks. The East London Line is now fed from 3x new substations, located at Hoxton, Shadwell and Canal Junction. In addition there's a TP Hut at Dalston Junction, and for the next phase there will be a new substation at Dalston Kingsland and a reconditioned former BR substation at Highbury. I believe the Surrey Docks building still houses certain equipment and is as such still part of the operational railway, though I'm not 100% certain on this. There's a few substations which have kept obsolete names, e.g. Heathrow Central, Hornchurch, Upminster, Brentham, Northwood. |
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Post by redbond on Nov 17, 2010 20:32:58 GMT
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Post by railtechnician on Nov 17, 2010 23:53:37 GMT
I am fairly sure that Surrey Docks substation was closed after the (LU) East London Line closed. The building still stands, however, or at least did a couple of weeks ago. Despite the nearby station being renamed Surrey Quays, the substation remained known as Surrey Docks. The East London Line is now fed from 3x new substations, located at Hoxton, Shadwell and Canal Junction. In addition there's a TP Hut at Dalston Junction, and for the next phase there will be a new substation at Dalston Kingsland and a reconditioned former BR substation at Highbury. I believe the Surrey Docks building still houses certain equipment and is as such still part of the operational railway, though I'm not 100% certain on this. There's a few substations which have kept obsolete names, e.g. Heathrow Central, Hornchurch, Upminster, Brentham, Northwood. Presumably the T/T wires have been diverted to new equipment at the new substations. Although the system maybe something totally new I have an idea that the T/T equipment may have been built by Ford Electronics which designed the latest Jubilee and Northern Line T/T equipment. It's a long time since I worked on ELL T/T equipment or indeed anything on the ELL, must be about 20 years ago now. |
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Deleted
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Post by Deleted on Nov 18, 2010 1:29:05 GMT
The tunnel telephone system is still in place on the ELL between Whitechapel and Surrey Quays (although it is only used as a last resort of communication should both the GSM-R and SPT fail or to isolate the third rail in an emergency). There is a handset located in each driving cab. That's interesting but as you mention T/T being a last resort comms system is it correct to assume that, if necessary, removal of traction current is normally by use of SPT? From memory ISTR this was/is the method employed to remove traction from OHLE on Network Rail. For NR underground tunnels I recall the pinch wire system being similar to although different from the LU T/T system. Is ELL tunnel section traction still supplied from the LU substations? The removal of traction current under normal circumstances is done by calling the ECO based at Lewisham via the ELL Signaller (using the Emergency Call procedure). We've have been instructed to always use the GSM-R as this is the preferred method of communication, but if that has failed and it is an emergency situation which requires the traction current to be isolated, then we would use the tunnel telephone system. |
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