IRSE Exam Forum - Pictures of installation

Just thought I would throw up a couple of pictures of some installation work I did the other weekend whilst working on a renewal site, it maybe of some interest for the guys that don't get the chance to get hands on.
It's just a picture of terminations to a 'pump handle' points machine, hopefully you can clearly see on the right hand side of the picture, the terminations for WM+, WM-, meaning the points motor, and different polarities, RW+, RW- (reverse points, again different polarities, and finally NW+, NW- (normal points), on different polarities, this was done on a 'seven core,' cable but there is obviously only 6 terminations here leaving one spare.

In the second photo it basically shows the 'four core' cable terminated into a 'disc box' which if I hadn't of lost the picture you would of seen that it is actually mounted onto the points machine itself.

In both pictures you may notice that I have looped each core back on itself (general practice) maybe not so much in the first picture due to the lack of space, but the reason for is just incase you need to re-crimp, in the case of a 'tester' not liking a particular crimp, hopefully not on my watch.

Hope some people have found this fairly interesting and a half decent insight, these are just photo's I have used as evidence in my IRSE logbook for my licence.

(16-06-2010, 04:28 PM)Archie Wrote: [ -> ]It's just a picture of terminations to a 'pump handle' points machine, hopefully you can clearly see on the right hand side of the picture, the terminations for WM+, WM-, meaning the points motor, and different polarities, RW+, RW- (reverse points, again different polarities, and finally NW+, NW- (normal points), on different polarities, this was done on a 'seven core,' cable but there is obviously only 6 terminations here leaving one spare.

In the second photo it basically shows the 'four core' cable terminated into a 'disc box' which if I hadn't of lost the picture you would of seen that it is actually mounted onto the points machine itself.

Did you actually post 2 pictures? I only see the one of the 4c in dis box.

Yes this shows the pre-terminated leads (otherwise known as "flipper cables") used for clamplocks. These are colour coded with yellow and black ends as they are used to connect dis box to the left hand mech, then left hand mech to right hand mech, then right hand mech back to disbox (or vice versa depending upon which is the normally closed switch tongue). The disbox is often supported on the same concrete base as is under the hydraulic power pack; it is mounted at the back (rather than at the edge where someone manually pumping the points would be standing).

The 4c cables in this disbox brings the detection voltage from the location and then feed the NKR and RKR detection relays back in the location; see attachment.

Generally in my experience the 7c cable terminates directly on links in the clamplock power pack (although I think the newer ones may have plugcoupler connections); there are indeed 6 cores used for 3 separate ciircuits: Normal valve feed, Reverse valve feed and the pump motor.

If you attempt to operate the points manually and just start pumping without holding the "gearstick" in the appropriate direction to mechanically operate the relevant valve, you'll find the pumping very hard going and completely ineffective as what you are trying to do is compress the hhydraulic oil without giving it anywhere to flow to!

(16-06-2010, 05:27 PM)PJW Wrote: [ -> ]Did you actually post 2 pictures? I only see the one of the 4c in dis box.

I thought I had attached it but try this again, i thought it might be a good idea to have some photos on the site what do you think?

(16-06-2010, 05:41 PM)Archie Wrote: [ -> ]
(16-06-2010, 05:27 PM)PJW Wrote: [ -> ]Did you actually post 2 pictures? I only see the one of the 4c in dis box.
I thought I had attached it but try this again, i thought it might be a good idea to have some photos on the site what do you think?

The motor links are slipped out, the valve links are non slideable. I guess that the small cable and screw termination block must be part of some condition monitoring arrangement to measure currents / throw times.......

Is it Ok to post pictures on here every now and again, just to show people on here what us installers do out on the track?

(16-06-2010, 06:18 PM)Archie Wrote: [ -> ]Is it Ok to post pictures on here every now and again, just to show people on here what us installers do out on the track?

just one more photo not that glamorous, an AWS installed, just up from 'Camden Road' Station, on the 'North London Line Project,' installation obviously done in a
T3 possession.