The Ground position light signal is generally used to indicate to the driver the correct formation of the shunting route by means of the proceed aspect. The implementation and characteristics of the Ground position light signal are given by sub-sections 2, 3 and 4 of art. 52 of the Signalling Regulations.
The Ground position light signal consists of three white lights arranged horizontally and vertically, and is installed on a concrete base located to the left side of the railway track.
The OFF aspect is set when two white lights arranged in a horizontal line are lit, while the PROCEED aspect is set when two white lights in a vertical line are lit.
ECM's Ground position light signal consists of a modular structure (3 optical units and a power unit), and can be interface with the existing ATP signal systems (SSC or SCMT).
|System power supply voltage||135 ÷ 165 Vca|
|Nominal power||3 x 20 W|
|Dielectric strength||> 2000V, 50Hz|
|Isolation resistance||> 10 Mohm|
|Working temperature||-25 ÷ 70 °C|
|Signal sizes||440 (lar) x 240 (lun) x 550 (h) mm|
|Weight of the complete signal||Approximately 11 Kg|
|MTBF||> 300.000 h|
|Colour emitted||lunar white (BSI standard No. 1376)
x,y tri-chromatic co-ordinates such that:
0,330 < x < 0,420
y - 0,64 x < 0,150
y - 0,75 x > 0,050
|Light intensity on the light axis ( 9' upwards and 6° trackwards)||>60 cd