What does this plate mean on this sleeper?

[king_walnut]

There was another one on the other line with arrows facing the other way so the arrows mean direction of trains but the rest I have no idea or ever seen before.

 

[mcmad]

Is it a third rail line and indicating where earthing straps are to be applied?

 

[pdeaves]

KJE1 is the Engineers Line Reference (ELR), Down Lewes tells you the line, 49m 70ch is the mileage DSP is, I think, Designated Switching Point and is to do with the electrification. The arrows show where to put safety straps.

 

[59CosG95]

KJE1 is the Engineers Line Reference (ELR), Down Lewes tells you the line, 49m 70ch is the mileage DSP is, I think, Designated Switching Point and is to do with the electrification. The arrows show where to put safety straps.

Indeed. This seems to be the 3rd Rail equivalent of the DEP for OLE; even the font on DSP looks similar!

 

[Mcr Warrior]

So would that place the location as being on the 'Down Lewes' line, between Cooksbridge and Lewes stations, on the Lewes station side of Lewes tunnel?

 

[zwk500]

There was another one on the other line with arrows facing the other way so the arrows mean direction of trains but the rest I have no idea or ever seen before.

Is this taken from a train on the adjacent Up Lewes or from Platform 1?

So would that place the location as being on the 'Down Lewes' line, between Cooksbridge and Lewes stations, on the Lewes station side of Lewes tunnel?

Lewes tunnel ends at 49m 67ch, so this sleeper is c.60m south of the Tunnel. Lewes has 12-car platforms on the London side and the Down London platform runs under the road bridge and IIRC is definitely closer than 60m to the tunnel mouth (the up platform is tight to the tunnel mouth). So this sleeper would be pretty much just at the London (rear) end of the platform. Image here: https://www.bloodandcustard.com/BR-Tunnels-Lewes.html

 

[Railsigns]

DSP = Designated Strapping Point.

 

[pdeaves]

DSP = Designated Strapping Point.

Strapping, of course. My brain stalled!