| 摘要 |
FIELD: electricity.SUBSTANCE: method for operation of a lens traffic light with a double-filament lamp includes monitoring integrity of lamp filaments and applying voltage across one of the filaments, wherein voltage is applied across the filament successively each time the lamp is turned on. The apparatus for realising said method includes a lamp filament failure indicator, an alternating voltage source, a first relay and a second relay, a transformer and a signalling lamp. The apparatus is further equipped with three diodes, a capacitor, two AND elements, an OR element, wherein the first relay is polarised and has two windings.EFFECT: reduced power consumption.15 cl, 4 dwg |
