Alextrack - Railways - Bristol East Signal Box

The web site of Alex Seal Alexander William Major Seal from Torquay Bristol Panel Slough IECC Network Rail Signalman Signaller Bristol Temple Meads General Railway Signal

Bristol East Signal Box

Like most of the website this part is a bit of a mess, merely a collection of useful items that I have amassed during my research into Bristol Temple Meads East Signalling. If you're interesting in the Great Western Railways power signalling at Bristol Temple Meads I can do no better then to point you in the direction of the appropriately named Power Signalling at Bristol article!

Train Registers

Page 19, Page 20, Page 21, Page 22 more to come! I guess it might even help if I give you the date of them!

Details about Bristol East

Bristol East Illuminated

A few photos

Photographers

Maurice W Earley

Collection with NRM? - APRoGWS page 72

Adrian Vaughan

APRoGWS page 41

Track Circuit Lamps

T2 - 7mm Telephone Slide Base Filament Lamps

Filament lamps will perform to specification and give optimum life when:
a) they are powered at the rated voltage from a stabilised 50 Hz A.C. supply
b) ambient temperature is in the range 20°C to 25°C
c) no mechanical vibration is present.
Deviations from these criteria can have a significant effect on lamp life, particularly with low current filaments (<80 mA).
Operation from a d.c. supply at rated voltage can reduce specified life by up to 50%.
The effect of variation from the rated operating voltage should be noted:
5% above will reduce lamp life by up to 50%.
5% below will significantly increase lamp life.
Current consumption can vary by up to ±10% on stated values at rated supply voltage. Care therefore should be exercised when running a number of lamps in series. In such applications it is recommended that the rated voltage be reduced by 10% to prevent premature failure of individual lamps.

Technical specification

Voltage 12V
Current 100mA = 0.1A
Lumens 3
MSCP 0·24
Average life (hrs) 2,000

1 ampere = 1 000 milliamperes

123 Track Circuits = 246 Lamps
246 x 0.1A = 24.6 Amps

P=IV 24.6 x 12 = 295.2Watts