SU1427484A1 - Arrangement for remote control of mine group circuit-breaker - Google Patents

Abstract

The invention relates to electrical technology and can be used to control mining machines and mechanisms. For safety reasons, loss of control is unacceptable. The purpose of the invention is to increase the safety of work and reliability of power supply. A device for controlling a group circuit breaker (AV) G with contacts 2 and intermediate disconnecting relay 3 contains end diodes 6 and 11, a disconnecting relay 20 with contact 7, a voltage control unit 26 with contacts 8.9, a switching contact 13 devices (KA), switching on relays 21, receiving relays 27 and 28 with contacts 15 and 29, as well as emergency shutdown buttons. 30, 31. When you press one of the buttons 30 or 31, pins 15 and 29 open and turn off the spacecraft of all machines, but the AV is not turned off. If at least one of the satellites does not turn off, one of the auxiliary contacts 13 will remain closed and the group AV will be turned off. The subsequent switching on of the AV is possible. Only after the malfunction of the spacecraft is eliminated. I p. S (l

Description

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The invention relates to electrical engineering, in particular to remote control of mining machines and mechanisms for which, due to safety, a control loss is unacceptable.

The purpose of the invention is to improve the safety of work and the reliability of the local power supply.

The drawing shows the electrical circuit of the device.

The remote control device of the group automatic switch-off 1 | switch (AB) 1 with power contacts j 2, intermediate relay 3, disconnecting the 11-group automatic switch. Contains power circuits 4 and two-wire communication line 5, the first terminal Diode 6, contact 7 of the relay, 20 a contact 8 of the control unit; the voltage at the output of the group and automatic switch, open, the contact 9 of the control unit

relay 21 is connected to a two-wire AB communication line. With its closing part 8, it connects the AV Contact 7 disconnecting relay 20 in series with the two-wire connection in series with the first end diode 6, and the disconnecting part 9 connects the second end diode 10 to the control circuit AB, according to the first end diode 6. Parallel Circuits of series-connected decoupling diodes 12 and auxiliary contacts 13 of switching devices (magnetic starters or control stations supplied from a grouped automatic switch) are connected to the second end diode 10 of counter-parallel about. Diodes 11 serve to isolate the power sources. The transistor 19, the resistor 18 and the diodes 16 form a two-input element OR, to the output of which the disconnecting relay 20 is connected, and to the input signals from the receiving relay 28

April 1 at the output of the group auto-25 (pin 15) and from the switching switch of the second switch, the second connector (auxiliary contacts 13).

Go diode, diodes 11, which are the contacts of the receiving relay 28 on) for isolating the power sources, are in the switching control circuit

isolating diodes 12, block contacts

Switching devices 13, resis-30

Torah 14, closing contact of apparatuses (not shown).

Enable AB. When AV is turned off, i.e. power contacts AB 2 are open, power circuits 4 are de-energized. The two-wire line AB 5 is closed through the second end diode 10 and the detachable relay 15, diodes 16, condenser-h tor 17, resistor 18, transistor 19, Yle 20 off, relay 21 turning on AV. When AV is turned off, i.e. power contacts AB 2 are open, power circuits 4 are de-energized. The two-wire line AB 5 is closed through the second end diode 10 and

yi, the resistor 22, the diode 23, the condensation-05 closing part 9 of the relay contact 21.

torus 24, source 25 of direct current, which are input to block 26 of the voltage control at the output of the group automatic switch, receiving relays

If switching devices powered by a group AB are disconnected and their auxiliary contacts are not closed, then the AV is ready to be switched on, since its

relay 21 is connected to a two-wire AB communication line. With its closing part 8, it connects the AV Contact 7 disconnecting relay 20 in series with the two-wire connection in series with the first end diode 6, and the disconnecting part 9 connects the second end diode 10 to the control circuit AB, according to the first end diode 6. Parallel Circuits of series-connected decoupling diodes 12 and auxiliary contacts 13 of switching devices (magnetic starters or control stations supplied from a grouped automatic switch) are connected to the second end diode 10 of counter-parallel about. Diodes 11 serve to isolate the power sources. The transistor 19, the resistor 18 and the diodes 16 form a two-input element OR, to the output of which the disconnecting relay 20 is connected, and to the input signals from the receiving relay 28

control circuit switching

devices (not shown).

Enable AB. When AV is turned off, i.e. power contacts AB 2 are open, power circuits 4 are de-energized. The two-wire communication line AB 5 is closed through the second end diode 10 and the disconnecting part 9 of the relay contact 21.

If switching devices powered by a group AB are disconnected and their block contacts are not closed, then the AV is ready for switching on, since its

27 and 28, the closing contact 29 at 40 the triad relay 3 is turned on. If

Relay 27, emergency shutdown buttons 30 and 31, intrinsically safe AC power supply 32.

The device works as follows.

The receiving relay 27 is controlled by the emergency shutdown button 30 of the mining console. The contact 29 of the relay 27 is included in the circuit of the receiving relay 28 in series with the emergency shutdown buttons 31 in communication posts.

The voltage control unit 26 consists of a high-speed direct current relay, the disconnection time delay of which is provided by the capacitor 24 and the resistor 22, and the direct current source 25 connected to the power circuit switched by the AV. Changeover contact 8-9

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Any block contact is closed, any power contact is closed, which can lead to the automatic switching on of the mining machine after switching on the AV, AV cannot be switched on, since the intermediate relay 3 flows with alternating current and is turned off.

After switching on the AV, a voltage appears at the output of the source 25, turns off the relay 20 and relay 21. Switch 8–9 relays is switched. The two-wire line AB 5 is closed through the first end diode 6, pin 7 of the shutdown relay 20, and the locking part 8 of the relay contact 21.

Disable AB. When pressing any of the buttons (30 or 31) of the emergency key, the receiving relay 28 is turned off. The contacts of the relay 28 break the circuit

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any block contact is closed, i.e. If any power contactor is closed, which may cause the mining machine to switch itself off after switching on the AV, it is impossible to turn on the AV, since the intermediate relay 3 is flowed around by alternating current and turned off.

After switching on the AV, a voltage appears at the output of source 25, turns off relay 20 and relay 21. The contact 8-9 of the relay 21 switches. The two-wire line AB 5 is closed through the first end diode 6, the contact 7 of the shutdown relay 20, and the closing part 8 of the relay contact 21.

Disable AB. When pressing any of the buttons (30 or 31) of the emergency shutdown, the receiving relay 28 is turned off. The contacts of the relay 28 break the circuit

remote control of switching devices, and contact 15 of receiving relay 28 disrupts one of the basic circuits of transistor 19. If switching devices are switched off, which corresponds to disconnecting all machines and mechanisms, then all auxiliary contacts 13 are open. The transistor 19 remains open, the relay 20 is turned off, the AV is not turned off. If any of the switching devices does not turn off, i.e. if one of the block contacts 13 remains closed, then the transistor 19 closes up, since one of the base circuits through the expansion diode 12 and the block pin 13 is closed to the negative source 25, the other is disconnected from the source plus ..25 contact 15 of the relay 28 Relay 20 20 turns off, opens its contact 7 on the two-wire AB 5, disconnects intermediate relay 3. The AV turns off and de-energizes the power circuits of all switching devices powered by this AV. The subsequent switching on of the AV is possible only after the malfunction of the switching device is eliminated.

Claims (1)

The invention of the Device, remote control of a mine group circuit breaker, containing a spark-proof alternating current source, the output of which is connected to an intermediate relay and to the beginnings of wires ; two-wire COMMUNICATION LINE, receiving relay, the winding of which is connected to 0 5 0 5 0 five alarm | trip buttons, a trip relay, whose input is connected with parallel-connected block contacts of switching devices and a contact of a receiving relay, the first end Diode is connected in series with the contact of a relay relay, parallel circuits of series-connected block contacts of switching devices with corresponding developing diodes, characterized in that, in order to increase the safety of work and reliability of the power supply section, a voltage control unit at the output of the group th circuit breaker and a second diode terminal, wherein the series-connected first diode terminal and the relay contact. the disconnections are connected to the ends of the wires of the two-wire communication line through the closing contact of the voltage control unit at the output of the group automatic switch, the second end diode is connected in parallel with the series-connected contact terminals of switching devices and the disconnecting voltage control unit the output of a group circuit breaker is connected to the ends of the wires of a two-wire communication line, the first and second end diodes being connected according to each other with respect to the intrinsically safe power source of alternating current and opposite to the excitation diodes.