SU1361667A1 - Automatic reclosing device - Google Patents

Abstract

The invention relates to an emergency control device that specifically auto-recloses (AR). The goal is to extend the functionality by obtaining double and triple reclosing. When the device is turned on, the inversion input of the trigger (T) 1 is supplied with a logical unit (log. 1) and a reset signal of the counter 5. To perform a single automatic reclosure, the contact of the switch 6-2 is closed. At the direct output T 1, a logical zero (log. O) is generated, at the output of the inverter 2 - a log. 1, at the output of the element 2I-NOT 7 - log. 1 and at the output of element 2 and 8 - log. 1. When k.z. on terminal 10 of the protection sensor appears a log. 1, which switches T 1. Formation of the log. 1 on the forward code T 1 results in the appearance of a signal log. On the output of the inverter 2 and the log. About the output of element 2 and 8, which is a shutdown command. At the same time log. 1 at the direct output T 1 starts the delay element 3, which through the one-shot 4 switches T 1 and the counter 5. A log is formed at the first output of the counter. iy but because the switch 6-1 is open, the state of the element 2IL-HE 7 does not change. A signal is generated for reclosing. Double reclosing is carried out with the contacts of switches 6-1 and 6-2 closed. To obtain multiple automatic reclosing, the switches 6-1 ... 6-3 open. 1 il. 00 C3t 8 O) s

Description

This invention relates to an emergency control device that performs automatic reclosing (AR).

The purpose of the invention is to extend the functionality by obtaining double and triple AR.

The drawing shows a functional diagram of the device AR.

The device contains an RS flip-flop 1, the S-input of which is connected to the output of the protection sensor, and a direct output to the input of the inverter 2 and the input of the delay element 3, the output of which is connected to the input of the one-oscillator 4, a binary-to-ten counter 5, the counting input of which connected to the output of the one-shot 4 and the R-input of the RS-flip-flop 1, three switches 6, the first output of the counter 5 through the first switch 6-1 connected to the first input of the element 2I-HE 7, and the second and third outputs of the counter, respectively, through the second 6- 2 and third, 6-3 switches are connected to the second input of the 2I-HE 7, the output of which is connected to the first input of element 2I 8, the second input of which is connected to the output of inverter 2, and the output to terminal 9 for commands on the AR, RS-flip-flop 1 is connected to terminal 10 for protection sensor connections and the output of the element 2I-NOT 7 is also connected to terminal 11 to emit a signal for unsuccessful reclosure.

The device works as follows.

When the device is turned on, the R-input of the RS flip-flop is applied; logical unit and signal to reset (reset) counter 5.

To perform a single reclosure, the switch contact 6-2 closes. At the direct output of the RS flip-flop, a logical zero is generated, at the output of the inverter 2 - logical 1-, at the output of element 2И-НЕ 7 - logical 1 and, therefore, at the output of element 2И 8 - logical 1.

In the event of a short circuit at terminal 10 of the protection sensor, a logical 1 appears, which switches the RS flip-flop.

The formation of logical 1 at the direct output of RS-flip-flop 1 leads to the appearance of a signal of logical O at the output of inverter 2 and, therefore, g of logical O at the output of

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That is 2 and o, which is a shutdown command. At the same time, logical 1 at the direct output of RS-flip-flop 1 triggers delay element 3, which, after a predetermined time, generates a signal of logical 1 and through the one-shot 4 switches the RS-flip-flop 1 and simultaneously switches the counter 5. At the first output of the counter, logical 1 is generated but, since the switch 6-1 is open, the output state of element 2I-HE 7 does not change and a logical 1 is formed at the output of element 2I 8, a signal for reclosing. If there is a short circuit after re-activation, a logical / M is formed at the output terminal 10 of the protection sensor, and therefore a logical 1 is formed at the forward output of the RS flip-flop 1 and a logical O is formed at the output of element 2I 8.

At the same time, after a predetermined time has expired, a logical 1 is generated at the output of the one-shot 4, arriving at the counting input of the counter 5, a logical 1 is formed at the second output of the latter, which through the switch 6-2 switches the element 2И-НЕ 7, at the output of which a logical O is generated, resulting in a ban on subsequent AR.

Double reclosing is carried out with the contacts of switches 6-1 and 6-2 closed. In this case, the logic O signal at the output of element 2I-NOT, which performs the prohibition of automatic reclosure, appears only after the third pulse arrives at the counting input of the counter 5.

In order to obtain a three-fold automatic reclosing, the contact of the switch 6-3 closes, and a logical signal O at the output of element 2И-НЕ 7 appears only after the fourth pulse arrives at the input of counter 5.

To obtain multiple automatic reclosing, all switches (6-1) - (6-3) are opened, and one of the inputs of element 2И-НЕ 7 is closed to the device zero bus. In this case, logical 1 is always present at the output of this element, counter 5 is excluded from operation, multiple automatic reclosure is performed using RS flip-flop 1.

Claims (1)

Invention Formula  An automatic reclosing device (AR), containing a terminal for connecting a protection sensor, a terminal for sending an AR command, a delay element connected in series with the single-oscillator, an inverter, and element 2-NOT whose output is connected to the terminal for signaling an unsuccessful AR that is different so that, in order to extend the functionality by obtaining two- and three-time automatic reclosing, it is additionally equipped with an RS trigger, a counter, three switches 51 and element 2I, Compiled by V.Sidorov Editor I.Gorna Tehred L.Serdyukova Order 6300/54 Edition 618 Subscription VNIIPI USSR State Committee for inventions and discoveries. 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, 4. the S-input of the trigger is connected to the terminal for connecting the protection sensor, the direct output of the trigger is connected to the input of the inverter and the input of the delay element, the output of the one-oscillator is connected to the R-input of the trigger and the counting input of the counter, the first output of which 2I-NOT, and the second and third outputs through the second and third switches, respectively, are connected to the second input of the element 2I-NOT, the output; which is connected to the input of the element 2I, the first vhrd of which is connected to the output of the inverter, and the output of the element 2I is connected to the terminal for issuing a command to the automatic reclosure. Proofreader N.Korol