SU1178646A1 - Device for monitoring burn-out of light signal two-filament lamps - Google Patents

Abstract

A DEVICE TO CONTROL THE BURNING OF TWO-LUM LAMP LAMPS, containing connected through a cable line and a switching unit with a main and a backup thread of traffic light lamps, a main executive relay and an additional executive relay, the supply circuit of which includes a resistor and diode, and power sources, different In order to increase reliability, it is equipped with a key element, the input of which is connected to one power source, to which through the first rear contact an additional executive relay is connected The control input of the key element is connected to the specified relay, which is connected to another power source through its own second rear contact.

Description

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The invention relates to railway automatics and telemechanic devices for use in local powering of auto-lock traffic lights and electrical interlocking.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a schematic diagram of the device.

The device contains a double-filament light 1 with a main and backup filament filaments 2 and 3, which are connected via wires 4 and 5 of the cable line and switching unit 6, the main executive relay 7 and the additional executive relay 8 with contacts 8.1, 8.2, 8.3, The power supply circuit of which includes a parallel-connected resistor 9 and a diode 10, as well as a key element 11, made on a triac, whose input is connected to one power source (alternating current) with poles 12 and 13, to which a control is connected via the first rear contact 8.1. the input of the key element, and its output is connected to the relay coil 8, which through its own second rear contact 8.2 is connected to another power source (alternating current) with poles 14 and 13. In the power supply circuit of element 11, a limiting resistor 15 connected in parallel with the front one is connected contact 8.3, relay 8, and resistor 16. In the power supply circuit of relay 7, the contact 17 of the signal relay of the yellow traffic light (relay not shown) is turned on, and in the power supply circuit of the relay 8 the contact 18 of the signal relay of the yellow traffic light and contact 19 of the signal relay green are green of AGN traffic light (relay not shown).

The device works as follows.

With a good main thread 2, the alternating current flows through the thread, switching unit 6, the winding of the relay 7, the winding of the relay 8 and its contact 8.2. In this case, the relay 7 is under current, since it contains a rectifying bridge in its design, and the relay 8 does not pull the measles, because it is used

Slow-moving direct current electromagnetic relay without rectifier. Between poles 14 and 12 of the power supply, the required voltage is set, which is less than between poles 12 and 13. When the filament 2 burns out, unit 6 connects a backup filament 3. The current passes through filament 3, a diode 10 and a resistor 9, which allocate a constant the ac component necessary for attracting a relay core 8,

0, which attracts its own measles, fixes the burning out of the thread 2 and the inclusion of the thread 3. Relay 7 remains unchanged. Upon rupture, contact 8.1 of relay 8 turns on element 11 and at the same time breaks the power supply circuit of relay 8 by contact 8.2. However, relay 8 attracts measles, since the phases of the power signals at poles 14 and 12 coincide, and the amplitude of the power signal at pole 12 is greater than at pole 14. Thus, when thread 3 is turned on, relay 8 trips and at the same time the power voltage is applied above the previously installed and compensating level of voltage decrease on lamp 1 as a result of diode 10 and resistor 9 turned on.

Through parallel resistor

5 9 and diode 10 lamp 1 is powered by alternating current with asymmetrical half-waves, which makes it possible to use the resulting constant component for operation of relay 8 that does not contain a rectifier. To ensure the same effective value

 voltage or current to the main 2 and backup 3 filaments of a lamp I traffic light; the supply voltage applied to filament 3 increases due to the voltage taken (for example from a transformer) from poles 12 of one power source and from pole 14 of another power source relative to them common pole 13. When it is. to eliminate the failure of element 11, in the case of non-simultaneous opening of contacts 8.1 and 8.2, to the power circuit of element 1

The limiting resistor 16 is turned on, which is short-circuited when the front contact 8.3 of relay 8 is closed.

Claims (1)

DEVICE FOR CONTROL OF BURNER BURNING OF TWIN LAMPS A traffic light containing a main actuating relay and an additional actuating relay connected to the main and backup threads of the traffic lights through a cable line and an auxiliary relay, the power supply circuit of which includes a resistor and diode, and power sources, characterized in that, in order to increase reliability, it is equipped a key element, the input of which is connected to one power source, to which the control input of the key element is connected through the first rear contact of the additional executive relay, and its output is connected with said relay, which via its second rear contact is connected to another power source.