Derby's Street Lighting PFI Contract

Osmaston Road Railway Bridge, City Centre

The equipment being removed consisted of the following items in 1997; the rest of Osmaston Road had already been relit by the time that this scheme commenced, and so the already-removed items are excluded from the table below.

Seq. No. Lamp Number Location Lamp Type Watt Isolation Point
54 32645 OPP SHAftESBURY ST SXP1 135  
55 32646 O/S EMEB SUB SXP 135  
56 32647 CNR RAILWAY BRIDGE SXP1 135  
57 32648 ON RAILWAY BRIDGE SXP1 135  
58 32649 NEAR LITCHURCH LN SXPL3 135  
59 32650 OPP LITCHURCH LN SXPL1 135  
60 129037 CNR OF LITCHURCH LN SXPL3 135  
61 32651 OS RR FOUNDRY SOX 180  
62 32652 O/S R.R. FOUNDRY SOX 180 Y
63 32653 O/S ROLLS ROYCE FOUNDRY SOX 180  
64 32654 O/S R.R. FOUNDRY SOX 180  
65 32655 OPP RR FOUNDRY SXP1 135  
66 32656 OPP RR FOUNDRY ENT SXP1 135  
67 32657 O/S JUBILEE CITY P.H. SXP1 135  
68 32658 O/S R.R. CAR PARK SXP1 135  

The following photographs were taken on Saturday, 15th October 2011.

The first outgoing column supported a GEC Z9554 135 Watt SOX lantern.

 

As the original Z9554 was not designed for photocell operation, the NEMA socket has to be placed at an angle on the lantern's canopy. The later Z9554M lantern saw a flat horizontal section incorporated into the canopy; allowing for a more centrally-located NEMA socket.

 

The replacement Iridium's NEMA socket was situated in a more suitable position.

 

The next column had had its Z9554 replaced with an integrally-geared Philips MA 50.

 
 

The lantern was fitted with a Royce Thompson SC1000 photocell.

 
 

Another column supporting an MA 50 followed; the difference between the old and new columns is very evident here.

 

This lantern's canopy was altogether more weathered in its appearance than the previous example's canopy was.

 

The new lighting was not operational at the time of photographing; the morning dew on this Iridium's canopy proves this.

 

The lighting now moves to the other side of the road, as the junction into Litchurch Lane prevented anything from being installed on that side of the road at this location.

 

Two generations of Philips-made lanterns - separated only by a few metres!

 

A Thorn Alpha 8 had been used as the next replacement lantern. The Fabrikat column on the right hand side that is also supporting an MA 50 was newer than the rest of the surrounding columns were.

 

The Alpha 8 post-dates the above 1997 inventory records, although I do not know when it was actually fitted. It is in a surprisingly clean condition, however.

 

A close-up of the MA 50 reveals that it is fitted with a (potentially original) Hy-Lite HL4N photocell from the 1990s; it also has two loose bowl catches.

 

A long-based CU Phosco column also supporting an Alpha 8 followed; again, this column was newer than many of the other columns along this stretch were.

 

CU Phosco tubular steel columns are often identified by their spindly outreach brackets; and the fact that their logo is usually embossed into the inspection door.

 

Before the Alpha 8s were installed, Relite Hyperion 180 (180 Watt SOX) lanterns were fitted. Two examples still remained until the relighting scheme commenced.

 

Compared to the installations seen further up this page, a considerable amount of the bracket appeared to slip over over the column shaft for these lanterns; perhaps as a means to increase the overall mounting height slightly.

 

The new lanterns run either 150 Watt or 250 Watt SON-T lamps.

 

It is interesting to note that the new columns are situated to the front of the footway; usually, new columns are set back in order to make them less vulnerable to vehicular collisions. Incidentally, the building situated to the left used to be one of the Derby Corporation tram depots, many moons ago!

 

An array of wires could be seen resting on the inside of this lantern's bowl.

 

In case you were wondering whether I was going to mention the privately-owned Atlas Alpha 3 spotted in the above wide shot, I was! This example is possibly older than my own first example is, as the "atlas" logo and "ALPHA THREE" are cast into the rear shoe section, when such details are omitted from this example. The concrete bracket is showing slight signs of spalling but the installation is otherwise in a good condition for its age.

 

The next installation supported the last MA 50 installed along this road.

 
 
 

An integrally-geared Thorn Alpha 4 135 Watt SOX lantern was next; this was the only one of its kind that was left on the road.

 

The Alpha 4 would also have been a replacement for a failed older lantern; it was probably around ten years old by the time that this scheme commenced.

 

Z9554s were fitted to the final couple of outgoing columns along this road.

 
 
 

The second lantern was partially obscured by adjacent overhanging tree branches - wisely, the replacement columns were situated away from the tree.

 

The characteristic dimples of a Philips-made SOX lamp can just be seen through the bowl refractors.

 
 

The new lanterns employ photocells that activate the lamp when ambient light levels fall below 35 Lux, and deactivate when ambient light levels increase to above 18 Lux.

 
 

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