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NR BR 1651 PART 3

Fibre Optic Banner Signal

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Organization: NR
Publication Date: 1 March 1991
Status: active
Page Count: 22
scope:

This specification covers the requirements for a Banner Signal using Fibre Optic Light guides.

The Signal is required to display a circular lit indication on which there is superimposed either a horizontal unlit (black) bar for the 'ON' aspect or a diagonal unlit (black) bar for the 'OFF' aspect.

The 'ON' aspect indication is to be achieved using a split light box fitted with two lamp units, each fed from an individual transformer, so as to ensure that both semi-circular lit areas of the 'ON' indication will be illuminated at approximately half the luminous intensity if one lamp unit fails.

The semi-circular lit areas of the 'OFF' aspect indication are to be illuminated together from a single designated lamp unit and individual transformer

Document History

NR BR 1651 PART 3
March 1, 1991
Fibre Optic Banner Signal
This specification covers the requirements for a Banner Signal using Fibre Optic Light guides. The Signal is required to display a circular lit indication on which there is superimposed either a...

References

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