FIELD: railway transport; signaling and communication; internal traffic control.
SUBSTANCE: proposed device contains light-out relay 3, standby filament change-over relay 14, resistor, capacitor 4 two diodes, two line wiser, signal transformer, two-filament light signal lamp 15. If main filament of light signal lamp is in good repair, light-out relay is energized by direct polarity current. If main filament is burnt out, standby filament of lamp is energized and light-out relay is energized by reversed polarity current. If standby filament is burnt out, light-out relay is de-energized.
EFFECT: reduced number of cable cores, improved reliability of interval traffic control.
1 dwg
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