SU1418627A1 - Device for checking induction relay - Google Patents

Abstract

The invention relates to electrical measuring technology and can be used to monitor the state of induction relays in railroad circuits. The purpose of the invention is to increase reliability. The current passing from the rail line 12 through the track winding of the induction track relay 13 through the transformer 15 and the current-to-voltage converter 17 is fed to the inputs of the threshold elements 1 and 2. The current passing through the local: winding of the relay 13 0t is source 14F power 14 through the transformer 16 and the converter 18, is fed to the input of the amplifier 3, with the result that short pulses are formed at the output of the driver 4 pulses. If the voltage on elements 1 and 2 is normal, then a positive pulse from the output of element 5 sets the initial state of counter 6 and triggers 8 and 9. If the voltage on elements 1 and 2 is less than normal, then counter 6 fills impulses from the driver 4, and CPA. triggers trigger 8 through delay element 7. Trigger 9 does not work, because from the output of element 2, the logical zero is applied. If the voltage on elements 1 and 2 is higher than normal, then after filling the counters triggered. The ger 9 and through the element OR 10 does not give the trigger trigger 8. In case the track circuit is occupied by the mobile unit through the rear contact 13.f the relay 13, the triggers 8 and 9 are disconnected from:, counter 6 and stored information. Poros; gi triggering elements 1 and 2 are set by power sources 19 and 20. 1 il. S (L 4ik 00 Od N9 vl

Description

The invention relates to electrical measuring technology and can be used to monitor the state of induction relays in railroad circuits,

The purpose of the invention is to increase reliability

In the drawing, the functional diagram of the device is

The device contains threshold elements 1 to 2e whose inputs form the first-measuring input, and the second is formed by the input of the amplifier 3, .. the output is wired; connected to a formator of 4 impulses, the output of which is connected to the input of the element 5 and the counter b the output of which is connected via a delay element 7 to the input of the trigger 8 and the input of the trigger 95 whose output is connected to the input of the element I-fflH 10 Output of the element 2 via an inverter 11 is connected to the input of element 5,

The drawing also shows a rail line 125 of a track relay 13 with a rear contact 13 and a reference voltage source 14. The connection of one and the other measurement inputs to the windings of the relay 13 is carried out respectively via current transformers 15 and 16 and current-to-voltage converters 17 and 18 .

The trigger threshold of the elements 1 and is set respectively by the sources 19 and 20 of the reference voltage.

The device works as follows.

The current flowing through the track winding of the relay 13 from the rail line 12, through the transformer 15 and the converter 17 enters the first measuring input, t, in, at the inputs of the threshold elements 1 and 2, and the voltage at the inputs of the elements 1 and 2 is proportional to the current in the local winding of the relay 1 from the source 14, From the output of the amplifier 3, the rectangular form receives the input to the shaper 4, which forms a short pulse along the positive voltage drop,

If the input voltage of the threshold elements 1 and 2 is less than the norm, then the output of the wc is the level of logical zero, the element 5 is locked and from

tel 4 impulses arrive at the input of the counter 6, when the counter 6 is filled, a voltage drop j will occur at its output resulting in a tip

trigger 8, and trigger 9 will remain as before, since the output of element 2 is a logical zero level, and triggering trigger 8 clearly indicates that the quantity being controlled is less than the norm. If the input voltage of the threshold elements 1 and 2 is within the normal range; then, at the output of element 1, a sequence of pulses acts, and at element 2 a level of logical zero, t, e, a positive pulse periodically appears at all inputs of element 5, as a result of which counter 6 and a trigger are continuously reset to the initial state - ry 8 and 9, which indicates that the signal is within the normal range.

If the voltage at the input of elements 1 and 2 is higher than normal, positive pulses act on the output of elements 1 and 2, as a result of which, through the inverter 11, negative impulses are received at the input of element 5, preventing the reset of counter 6 and triggers 8 and 9 of element 5. Counter 6 filled with rayls and after filling, a positive differential will occur at its output. as a result, the trigger 9 is set to one state, since at the output of element 2 positive pulses, from the output of trigger 9, a reset pulse will go through the element

10 at the reset input of trigger B, which

will remain in its original state, so

as the synchronization pulse from counter 6 will be delayed by element 7 for the time of trigger trigger 9 and element 10. Thus the trigger trigger 9 indicates that the controlled voltage is above the norm,

In the case of rolling stock recruitment through contact 13.1, a logical zero is fed to the inputs of the flip-flops 8 and 9, which will store the old information until the rail circuit is released, after which work resumes.

Thus, fixing the voltage level (current) on the track winding of the relay 13 at the time of passing the voltage (current) of the local winding through the zero level allows the detuning angle of the signals in the windings to be fixed, as a result of which you can control the driving current relay sector.

3141862

Claims (1)

Invention Formula A device for controlling an induction relay, containing the first and second r threshold elements, the inputs of which form one measuring input connected to one of the windings of the track relay, and the output of the first of which is connected to one of the inputs of the element I, the output of which is connected to one of the inputs counter, the output of which is connected to the first input of the first trigger, the second input of which is connected to the output of the second threshold element 5 5 delay element, the second trigger, the OR element and the amplifier-former, characterized in that reliability, it is equipped with an inverter, shaper 20 pulses, the output of which is connected 7 to the second inputs of the counter and the element AND, the output of which is additionally connected to the third input of the first trigger and one of the inputs of the OR element, to the other input of which the output of the first trigger is connected, and the output connected to the first input of the second trigger, the output of the counter is connected through the delay element to the second the second trigger input, the third input of which and the fourth input of the first trigger are connected to one of the poles of the power source via the rear contact of the track relay, and the output of the second threshold element is connected via an inverter to tert they input AND gate, the input of amplifier -formirovatel forms a second measuring input devices ,. and its output is connected to the input of the pulse driver.