SU1226568A1 - Device for remote controlling and checking two-position objects with protection units - Google Patents

Abstract

The invention relates to electrical engineering and can be used for remote control of coal mine objects with lock blocks. The purpose of the invention is to increase the control efficiency by ensuring continuous monitoring of the state of the communication line, improving operating convenience and eliminating spurious switching on of the relay receiving units. The device contains an AC power supply unit 1, AC sources 2.1 and 2.2, remote control stations (VP) (/) N :) o eat od 00

Description

5.1 and 5.2 with state switches 6.1 and 6.2 with three-position switching contacts 7.1 (7.2), 8.1 (8.2), 9.1 (9.2), diodes, alarms 15.1 and 16.1, command buttons 17.1 (17.2), common phase (RP) 19 of the power supply unit, receiving units 20.1 and 20.2. Output 18.1 (18.2) VP 5.1 (5.2) through communication line 27.1 (27.2) is connected to the enable relay (PB) 21.1

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The invention relates to electrical engineering and can be used for the remote control of objects of open-pit mines with protection blocks that rarely change their state, for example, 5 valves, high-voltage commutation devices.

The aim of the invention is to increase the control efficiency by ensuring continuous monitoring of the state of the communication line, increasing the convenience of operation and eliminating spurious switching-on of the receiving unit relays.

The drawing shows the electrical circuit of the device.

The device contains a unit for supplying alternating current with sources 2.1 and 2.2 of alternating current and with outputs 3.1, 4.1, 3.2, 4.2, remote 20 control posts 5.1 and 5.2 with switches 6.1 and 6.2 with three three-position switching contacts 7.1 ( 7.2), 8.1 (8.2) and 9.1 (9.2). diodes 10.1 (10.2), 11 .1. (11.2), 12 .1 25 (12.2), 13.1 (13.2) and 14.1 (14.2), signaling 15.1 (15.2) and 16.1 (16.2) using the command buttons 17.1 ( 17.2) and outputs 18.1 (18.2), common phase 19 power supply unit, receiving units 20.1 and JQ 20.2 with relay 21.1 (21.2) and switching on relay 22.1 (22.2), diodes 23 ; 1 (23.2) and 24.1 (24.2), shutting down: m 25.1 (25.2) and opening contacts 26.1 (26.2), communication lines 27.1 (27.2), alarm signal 28 of the communication circuit , a test button 29, a resistor 30, a command switch 31, and a power supply alarm indicator 32.

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(21.2) and the trip relay (PO) 22.1 (21.2) of the receiving unit 20.1 (20.2). The second output of PB 21.-1 (21.2) and the opening contact 26.1 (26.2) is connected to the OF 19, the second output of RO 22.1 (22.2) of the receiving unit and the closing contact 25.1 (25.2) of the end contact is connected to the OF 19, which ensures the elimination of spurious inclusions relay receiving units. 1z.p.f-ly, 1 ill.

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Each of the switching contacts 7.1 (7.2), 8.1 (8.2) and 9.1 (9.2) of the state switches 6.1 and 6.2 has codes 33.1 (33.2, 33.3).

The outputs 4.1 (4.2) of the sources 2.1 and 2.2 of the alternating current are combined and connected to the common phase 19 of the power supply unit, the first output of the alarm indicator 28, the link closure and the anode of the diode 14.1 (14.2) of the external control posts 5.1 and 5.2. Output

3.1 source 2.1 of AC current is connected via the make contact of the command switch 31 to the first channel of the make contact of the command button 17 .. 1 (17.2) of the external control posts 5.1 and 5.2. Pin 3.2 of the 2.2 source of alternating current is connected to the first outputs of the signaling devices 15 „1 (15.2) and 16.1 (16.2) of the remote posts 5.1 and 5.2 of the control second signals of the 1 contact of the command button 17.1 (17.2) and the indicator 15.1 (16.1) of the remote 5.1 and

5.2 are connected to the common output of the switching contact 7.1 (7.2) of the state switch 6.1 (6.2). The second output of the indicator 16.1 (16.2) of the remote unit 5.1 and 5.2 is connected to the common output of the switching contact 8.1 (8.2) of the state switch 6.1 (6.2). The output 33.1 of the switching contact 7.1 (7.2) and the output 33.3 of the switching contact 8.1 of the 6 6 1 switch (b.2) are connected to the anodes of the diodes 10.1 (10.2) and 13.1 (13.2), respectively. 33.3 switching contact 7.1 (7.2) and pin 33.2 of switching contact 8.1 (8.2) are connected respectively

to the cathodes of diodes 11.1 (11.2) and 12.1 (12.2) of diodes, the cathodes of diodes 10.1 (10.2) and 13.1 (13.2) are combined with the anodes of diodes 11.1 (11.2) and 12.1 (12.2), as well as with output 18.1 (18.2) of the external control post. Output 18.1 (18.2) of the remote station 5.1 (5.2) of control is connected via the line 27.1 (27.2) to the first stages of the on relay 21.1 (21.2) and on the relay 21.1 (22.2) to turn off the receiving unit 20.1 (20.2). The second output of relay 21.1 (21.2) is switched on via diode 23.1- (23.2) and the opening contact 26.1 (26.2) of the end contact is connected to common phase 19, the second input of relay 22.1 (22.2) disconnects the receiving unit through diode 24.1 (24.2) and the closing contact 25.1 (25.2) The end contact is also connected to common phase 19.

The device works as follows.

In the initial state, the alarms 16.1 (16.2) of the remote posts 5.1 (5.2) of the control and the emergency alarm 32 of the power supply unit are turned on by the dispatcher that the positions of the switches 6.1 (6.2) of the remote posts 5.1 and 5.2 correspond to the state of the controlled objects that are currently disabled. The on alarm 32 indicates that the device is in monitoring mode, i.e. Remote control stations 5.1 and 5.2 of the control unit were energized from the source 2.2 of the alternating current and the closure of the outputs 3.1 and 3.2 of the sources 2.1 and 2.2 did not have the alternating current.

To turn on an object, for example, an object monitored by the remote control 5.1, the state switch 6.1 is switched to the position where output 33.2 is closed. At the same time, the alarm 16.1 is connected via diode 14.G to the common phase 19 and it remains on, and the communication line 27.1, the switching contact 9.1 of the switch 6.1, opens the contact of the test button 29 and the communication line alarm 28 connects to the common power phase . If there is no potential at this link 27.1, i.e. the communication line is healthy and has no closure with other communication lines, the alarm indicator 28 does not turn on the controller to the fact that you can send a control command

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laziness. The command switch 31 is switched to a position in which the alarm indicator 32 is turned off and the command buttons 17.1 (17.2) of the remote control posts are supplied with voltage from the source 2.1 of the alternating current. The switch 6.1 of the state of the remote control station 5.1 is moved to the position when the output 33.1 is closed. When etrm, the detector 16.1 is turned off, since the diodes 12.1 of the remote control station 5.1 and the diode 23.1 of the receiving unit are switched on, and the alarm 15.1 of the same remote control station is turned on — the diode 10.1 is turned on according to the diode 23 .1 of the receiver ka.

This state of the detectors 15.1 and 16.1 indicates that the position of the 6.1 state switch does not correspond to the state of the control object. Pressing the button 17.1 on the external control post 5.1 controls the command to turn on the object. In this case, a current sufficient to turn it on flows through the winding of the switch-on relay 21.1 on the receiving unit 20.1. After the object is switched on and its end contacts are switched, contact 26.1 is opened and contact 25.1 is closed. In this case, the alarm 15.1 will turn off, and the alarm 16.1 will turn on, indicating to the dispatcher that the position of the 6.1 switch of the remote control station 5.1 corresponds to the state of the control object. At this point, the command sending cycle ends and the command switch 31 returns to the initial position, at which the alarm indicator 32 lights up and the voltage c. the command buttons of the remote control stations are removed.

If a protection unit operates in the control object, for example, the high-voltage cell is disconnected as a result of the operation of the maximum and current protection unit, the terminal contacts 26.1 and 25.1 of this object return to their original position at 25

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The rum warning device 15.1 turns on, the warning device 16.1 turns off, and instructs the dispatcher that the monitoring object has been switched off.

55 Dispatcher, shifting the state switch to the position where output 33.3 is closed disables the alarm 15.1 and turns on the alarm 16.1j

This indicates that the position of the switch 6.1 corresponds to the state of the remote station S.l to control the state of the control object.

The operation of the remote control and monitoring device is based on the amplitude-phase compaction of the communication channel and the following conditions must be met

NT; N,

 2N,

TO,

(12)

where Nj, N- are the output power, respectively, of sources 2.1 and 2.2 of alternating current;

 - power on of one relay of the receiving unit; N is the switch-on power of one remote position indicator; K - the number of remote control stations.

It is advisable to take the power of the 2.1 AC source at least 2-3 times the power of the 2.2 AC source.

If during the operation of the device the link is closed, for example with common phase 19, and the object was in the disconnected state and the position of the 6.1 switch of the remote station 5.1 control corresponded to the state of the controlled object, then the remote station control indicators 15.1 and 16.1 attracts the attention of the dispatcher to this post. At the same time, the inclusion of two remote control station detectors indicates the presence of a link closure.

If in the state control mode of objects, i.e. If the position of the command switch 31 is in the position indicated on the drawing, any remote control station will close ja then the relay of the receiving unit will not turn on because the power of the 2.2 alternating current source is not enough to turn on even one relay of the receiving unit. If the link closure occurs at the moment the command is sent to turn on or off the control object, then in this case the false switch-on of the object will not occur, since to simultaneously turn on two or more relays

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The power of 2.1 AC power is not enough.

 Button 29 test is designed to test the health of the alarm 28.

Claims (2)

1. A device for remote control and monitoring of on-off objects with protection blocks, containing an AC power supply unit, remote control stations for the number of objects with a state switch with two three-position switching contacts, first and second diodes, first and second signaling devices, receiving units with on relay and off relay, two diodes, closing and opening end contacts, with the output of the remote control station connected to the first output of the corresponding receiver the link line, and the second outputs of all receiving units are interconnected and the common phase of the AC power supply unit, the other phase of which is connected to the first inputs of the first and second signaling devices, the first terminals of the on and off relay coils are connected to the first output of the receiving unit, E; the second step of the winding of the turn-on relay is connected to the cathode of the first diode of the receiving unit, the anode of which is connected to the second end of the receiving unit through the opening end contact and to the cathode of the second end contact the diode of the receiving unit, the anode of which is connected to the second step of the winding of the disconnecting relay, characterized in that, in order to increase the control efficiency by ensuring uninterrupted control of the link state and increasing convenience of operation, each remote control station is equipped with the third, fourth and with a diode / switch and a command button with a closing contact, the first output of the closing contact of the command button and the second output of the first alarm device are connected to the common output of the first switching contact the state bodies, the first and third outputs of which are connected respectively to the anodz of the first and the cathode of the second remote station diode, the second one The second detector is connected to the common output of the second switch of the state switch, the first, second and third outputs of which are connected respectively to the cathode of the third and fourth diodes and the anode of the fifth diode, the cathodes of the first and fifth diodes are connected to the anodes of the second and third diodes and with the output the remote control station, the anode of the fourth diode is connected to the common phase of the AC power supply unit, the other phase of which is connected to the second terminal of the closing contact of the command button of the remote control station neither 2. The device according to claim 1, characterized in that, in order to eliminate false switching of the relay Editor A. Shandor Compiled by L.Krasnov Tehred L.Oleynik Proofreader E.Roshko Order 2143/54 Circulation 612 Subscription BNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, 4/5 Rauschska Emb. Production and printing company, Uzhgorod, st. Project, 4 the receiving units, the AC power unit contains two AC sources, the first terminals of the first and second AC sources combined with the common phase of the AC power supply unit and the second input of the first AC source connected to the second; With the closing contacts of the command button of the remote control stations, the second output of the second AC source is connected to the first terminals of the first and second signaling devices: The level of the control stations, the power of the first alternating current source is no less than two times higher than the power of the second AC source and corresponds to the switching power of one relay of the receiving unit.