SU1485354A1 - Apparatus for control of automated circuit-breakers with electromagnetic drive - Google Patents

Description

The invention relates to electrical engineering and can be used to turn on and off powerful three-phase loads, as well as to turn on and off powerful converters in electric drives. The invention relates to electrical engineering and can be used to turn on and off powerful three-phase loads, as well as, switching on to the disconnection of high-power converters in AC electric drives,

; The purpose of the invention is to increase reliability while simultaneously controlling two automatic switches.

The drawing shows a diagram of the proposed device.

2

alternating current. The purpose of the invention is to increase reliability while simultaneously controlling two automatic switches. The device contains on / off buttons with closing and opening contacts, two thyristors, six diodes, a resistor, and leads for connecting disconnecting and closing contacts of limit switches of electromagnets of drives, outputting coil of electromagnetic drives, power supply, disconnecting contacts of circuit breakers, common connection point open and short. contacts of electric switches

with

magnetic drives connected ~

in such a way that ensures the normal operation of two circuit breakers with an electromagnetic drive when they are simultaneously turned on and off with one control button. 1 il.

The device contains electromagnetic actuators 1 and 2 of circuit breakers 3 and 4. Each of the electromagnetic actuators has a series-connected interrupting contact of the limit switch 5, a closing contact of the limit switch 6, coils 7 and 8 of electromagnetic drives and a diode 9. Conclusions оды, A2, AZ, A4 Electromagnetic drives are designed to be connected to the control circuit and to the power supply (phases A and B of the AC power source „1485354

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four

voltage 380 V). Diodes 10-13 form the Gretz bridge. The chain of series-connected closing contact of the button "Off," 14 and the opening contact 15 of the "On" button 16 is connected to interconnected and with phase A power supply terminals A1 of drives 1 and 2 and to the anodes of diodes 10 and 11. The diagonal of the alternating current of the Gretz bridge built on diodes 10-13 is connected to terminals A2 of drives 1 and 2 "Thyristor 17 connected to pins A2 and AZ of drive 1, Thyristor 18 is connected to pins A2 'and AZ of drive 2 _С A chain consisting of a series-connected disconnecting contact 19 of the "Off" button 14, the closing contact of the "On" button 16 and resistor 20 are connected between the cathodes of diodes 12, 13 and the anodes of diodes 21 and 22 connected in the control circuit of thyristors 17 and 18. Opener contact 23 of automatic switch 3 bridges the closing contact of the "Off" button

14 and the diode 10, the disconnecting block-contact 24 of the automatic switch 4 bridges the closing contact of the "Off" button 14 and the diode 11. The signal lamp 25 through the resistor 26 and the closing contacts-27 and 28 of the automatic switches 3 and 4 is connected to an alternating voltage source . Pins 29-32 are designed to remotely control, for example, the relay contacts of automatic control stations for electric drives or from remote control buttons.

The device works as follows.

When pressing the "On" button 16 with a positive half-period of phase A of the power supply through the trip switches 5 of the actuators 1 and 2, diodes 12, and 13 disconnecting contact 19 'of the "Off" button resistor 20, diodes 21 and 22, coils 7 and 8 and diodes 9 of drivers 1 and 2 unlock thyristors 17 and 18, then through coil switch 5 of drive 1 and thyristor 17 turn on coils 7 and 8 of drive 1 of automatic switch 3, and through the limit switch 5 of the drive 2 and the thyristor 18 turn on the coils 7 and 8 of the drive 2 of the automatic switch 4.

When the automatic switch 3 is turned on, it opens it.

ten

15

20

25

thirty

35

40

45

50

The blocking contact 23 and its closing blocking contact 27 is closed, and when the automatic switch 4 is turned on, its opening blocking contact 24 is opened and its closing blocking contact 28 is closed. At this time, the lamp 25 lights up indicating the on state of both switches. Simultaneously with switching on the switches 3 and 4, the limit switches 5 of the drives 1 and 2 open, interrupting the supply circuit of their coils 7 and 8, and their limit switches 6 are closed. At the same time, the switches 5 of the drives 1 and 2 turn off through the coils 7 and 8 actuator 2 while pressing the "On" button 16 through the limit switch 5 of the actuator 1, if it cuts off later, diodes 10 and 3 3 interfere; the flow of current through the control transition of the thyristor 17 is prevented by the diode 21, and the current through diode 12 and the "On" button is limited by a resistor 20. The passage of current through the coils 7 and 8 of the drive 1 when the switch 2 of the limit switch 5 of the drive 2 is late is prevented by diodes 11 and 12 , the flow of current through the control transition of the thyristor 18 is prevented by diode 22, and the current through diode 13 and the “On” button is limited by resistor 20, Therefore, each of actuators 1 and 2 only works before opening its trip switch 5 and automatic switches. and 4 after development “On,” button stays on, When you press the “Off” button ^{, the} 14 coils 7 and 8 of drives 1 and 2 turn on with a positive half-phase of the power supply A through the disconnecting contact 15 of the “On” button 16, diodes 10 and 11 and the closing limit switches 6 of the actuators 1 and 2. In this case, when the limit switches 6 are not simultaneously disconnected, the passage of the current through the coils 7 and 8 of the drives 1 and 2, through the switch of the other drive and through the control transitions of the thyristors 17 and 18, the diodes 21 and 22, When the auto power off The telephones 3 and 4 close their opening contacts 23, 24 and the closing contacts 27 and 28 open. At the same time, the lamp 25 goes out. At the same time as the circuit-breakers turn off, they return to

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initial position limit switches 5 and 6 of the actuators 1 and 2. By simultaneously pressing the "ON" buttons and "Off," the on or off of the circuit breakers does not occur, since in this case the chain of the "On" button ¹ 'is terminated by closing contact 19 of the “Off / ¹ ” button, and the circuit of _the ”Off” button is terminated by closing with ιθ contact 15 of the “On,” button, ί Remote control of automatic switches is carried out in the same way using remote control buttons or 15 • relay contacts automatic control stations connected to terminals 29-32 of the control circuit.

In case of emergency shutdown of the automatic switch 3, for example, in case of overload, for example, its drive 1 automatically returns to the initial state. At the same time, the coils 7 and 8 of the drive 1 are powered along the circuit - the power supply phase, the disconnecting pin 25 15 of the “On” button, the disconnecting block <pin 23 of the automatic switch 3 and the limit switch 6 of the drive 1. The drive 2 is blocked by diodes 10 and 13 Drive 2

in case of an emergency shutdown of the switch 4, it returns to its initial state through the opening block contact 24 of the automatic switch 4 and the limit switch 6 of the actuator 2. Diodes 11 and 12 prevent the activation of the actuator 1 by disconnecting only one automatic switch of the second by pressing the "Off, / 'button . before

Claims (1)

Claim A device for controlling circuit-breakers with an electrically-45 magnetic drive, containing leads for connecting the closing contacts of a electromagnetic switch of a electromagnetic drive and a coil of an electromagnetic actuator, combined 50 leads for connecting disconnecting contacts of a electromagnetic switch of a electromagnetic drive and a power source, terminals for connecting points of connection of disconnecting and closing contacts of track-mounted switch of an electromagnetic actuator, 'leads for connecting disconnecting block-to ontakta automatic turn off 4 θ the on / off button with the closing and opening contacts, the first output of the closing contact of the power button is connected to the first output of the opening contact of the shutdown button, the first output of the closing contact of the release button is connected to the first output of the opening contact of the power button, distinguished by the fact that in order to increase reliability while simultaneously controlling two automatic switches, two thyristors, six diodes, a resistor were inserted into it, the second output of the closing contact the shutdown buttons are connected to the anodes of the first and second diodes, the cathode of the first diode is connected to the anode of the first thyristor, the anode of the third diode, the output for connecting the common connection point of the disconnecting and closing contacts of the ground switches of the electromagnetic drive of the first automatic switch and the second output for connecting the disconnecting the tread block contact of the first circuit breaker, the cathode of the second diode is connected to the anode of the second thyristor, the anode of the fourth diode, the output for connecting a common point is connected I open and close contacts of the ground switches of the electromagnetic actuator of the second automatic switch and the second output for connecting the disconnecting block contact of the second automatic switch, the second output of the disconnecting contact of the disconnect button is connected to the cathodes of the third and fourth diodes through the resistor connected to the anodes the fifth and sixth diodes, the cathode of the fifth diode is connected to the control output of the first thyristor, the cathode of which is connected to the output d To connect the closing contact of the electromagnetic actuator limit switch and the electromagnetic drive coil of the first automatic switch, the cathode of the sixth diode is connected to the control terminal of the second thyristor, the cathode of which is connected to the output for connecting the closing contact of the electromagnetic actuator switch and the second auto-magnetic drive coil 1485354 eight the magic switch, the second output of the opening contact of the power button is connected to the leads for connecting the break contacts of the ground switches of the electromagnetic actuators of the first and second circuit breakers, and the first output of the opening contact of the power button is connected to the first terminals for $ connecting disconnecting contacts of the first and second circuit breakers.