Difference between revisions of "Signalling Nomenclature"

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Revision as of 06:42, 14 June 2016

Individual signalling elements (signals, track circuits, points, level crossings) are identified by means of standard nomenclature. The trackside equipment, which generates the data for the signalling elements, may include solid-state interlocking (SSI) outputs, relay contacts, push buttons, levers and other indications. In SOP's and ECS's, the first letter denotes the general kind of the element. Preceding letters denote the function of the element. This is not always the case, as some labels don't have the first letter.

Meaning of the first letter:

Code Meaning
L Level Crossing
P Points
R Route
S Signal
T Track Circuit

Signals

Code Meaning
BR, R Repeater signal
RGE Electric lamp illuminating danger aspect (Red)
HGE Electric lamp illuminating caution aspect (Yellow)
DGE Electric lamp illuminating clear aspect (Green)
RGK Electro-mechanical indicator, signal showing danger aspect (Red)
HGK Electro-mechanical indicator, signal showing caution aspect (Yellow)
DGK, OFFK Electro-mechanical indicator, signal showing clear aspect (Green)
OFFG Signal apparatus OFF, signal showing clear aspect (Green)
LOSECK Electro-mechanical indicator, Limit of Shunt

Points

Code Meaning
GF Ground Frame
FK Electro-mechanical indicator,
N Normal
NK Electro-mechanical indicator, normal
NWK Electro-mechanical indicator, points operating apparatus normal
R Reverse
RK Electro-mechanical indicator, reverse
RWK Electro-mechanical indicator, points operating apparatus reverse