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INVENTION
Patent of the Russian Federation RU2079201
DEVICE FOR PROTECTION OF ELECTRIC CONSUMER FROM OVERLOADING
IN THE ELECTRICITY NETWORK

Applicant's name: Nikolay Y. Talalayev
The name of the inventor: Nikolai Y. Talalayev
The name of the patent holder: Talalaev Nikolay Yurievich
Address for correspondence:
Date of commencement of the patent: 1994.08.08

Use: to protect electric consumers from overvoltage for the purpose of AC power supply.

Essence: in the first embodiment, the device comprises two thyristors, two transistors, two valves, an on-off generator, a trip generator and a control unit containing the threshold element. Each thyristor is connected between the collector and the base of the corresponding transistor, an appropriate valve is connected between the emitter and the collector of the transistor. The trigger generator controls two thyristors, the trip generator controls two transistors. The control unit controls, depending on the input voltage, the on and off generators. In the second variant, each thyristor is connected between the collector and the base of the corresponding transistor, a corresponding valve is connected in series with each transistor. In the third embodiment, the device comprises a thyristor, a transistor, four valves forming a full-wave bridge rectifier. The thyristor is connected between the collector and the transistor base, the transistor is connected to the output terminals of the bridge rectifier.

DESCRIPTION OF THE INVENTION

The invention relates to electrical engineering and can be used to protect electric consumers from overvoltage in alternating current power circuits.

A device for protecting an overvoltage load is known , containing current-limiting resistors, relays, voltage-control units [1]. The disadvantage of this device is the low operating speed due to the presence of a relay that commutes current-limiting resistors.

A device containing two triacs, two capacitors and a resistor is also known [2] The drawback of this device is the response to a voltage change, rather than its value.

The closest to the proposed device in terms of technical essence is the device for protecting the electric consumer from overvoltage , containing a threshold element, an executive body made on thyristors, matching thyristors, four diodes, three resistors, a matching transformer [3] The drawback of this device is the transmission of an increased voltage to Consumer for some time, due to the use of non-protected protective thyristors.

The task of solving the claimed invention is to increase the speed of the device, to avoid the passage of increased voltage to the consumer. This problem can be solved using three inventions.

The essence of the first proposed invention lies in the fact that the device for protecting an electric consumer from overvoltage of the power supply network, comprising:

• A control unit including a threshold element, each of the two inputs of the control unit is connected to a corresponding input terminal of the entire device,
• The generator of inclusion, whose control inputs are connected to the outputs of the control unit,
• Two thyristors, the control terminals of which are connected to the outputs of the switching generator,
• Two transistors are introduced, between the collector and the base of each of which a thyristor is connected by trunk terminals,
• A trip generator is introduced whose control inputs are connected to the outputs of the control unit, and each of the two outputs to the base corresponding to the output of the transistor,
• Two valves are inserted, each of which is connected between the emitter and the collector of the corresponding transistor, two identical valve outputs are connected to the above two input poles, and two others to the two output poles of the entire device, with each valve terminal connected to the corresponding pole.

In the first particular embodiment, an asymmetry determination unit having two pairs of inputs is additionally introduced, one of the inputs of each pair is connected to the anode and the other to the cathode of the corresponding gate pair, the output of the asymmetry detection unit is the second output of the entire device.

In the second particular case of execution, a matching element, an element for determining the voltage transition through zero and a mode processor, the outputs of the threshold element and the zero voltage sense detection element are connected to the inputs of the mode processor, the inputs of the matching element are the inputs of the control unit, and the connection outputs To the inputs of the threshold element and the element for determining the voltage transition through zero, the outputs of the mode processor are outputs of the matching block.

The technical result that can be obtained in the implementation of the first invention is that in it

• The passage of increased voltage to the consumer is excluded
• The load is switched on at the moment when the supply voltage passes through zero,
• The mode of perpetual disconnection, the reclosing mode and the stabilization mode are realized.

The essence of the second proposed invention is that the device for protecting the electric consumer from overvoltage in the power supply network, comprising

• A control unit including a threshold element, each of the two inputs of the control unit is connected to a corresponding input terminal of the entire device,
• The generator of inclusion, whose control inputs are connected to the outputs of the control unit,
• Two thyristors, the control terminals of which are connected to the outputs of the switching generator,
• Introduced two transistors, between the collector and the base of each of which is connected by trunk terminals corresponding to the transistor thyristor,
• A trip generator is provided, whose control outputs are connected to the outputs of the control unit, and the outputs to the bases of the transistors,
• Two valves are introduced through each of which between the one input of the above input and one output terminal of the entire device, a tri-gate transistor is connected to the main leads with a trunk terminal, in which two valves, collector and emitter junctions of the two transistors are included in the loop, The input pole, from the above input poles, is connected to the other output pole of the entire device.

In the first particular embodiment , an asymmetry detection unit is additionally introduced, the two inputs of which are connected to the input and output poles of the entire device, between which the above transistors are connected, the output of the asymmetry detection unit is the second output of the entire device.

In the second particular case of execution, a matching element, an element for determining the voltage transition through zero and a mode processor, the outputs of the threshold element and the zero-point voltage detection element are additionally introduced into the control unit, the inputs of the matching element are the inputs of the control unit, and the outputs are connected To the inputs of the threshold element and the element for determining the voltage transition through zero, the outputs of the mode processor are outputs of the matching block.

The technical result which can be obtained in the implementation of the second invention is similar to the technical result that can be obtained by the implementation of the first invention.

The essence of the third proposed invention lies in the fact that the device for protecting the electric consumer from overvoltage in the power supply network contains

• A control unit including a threshold element, each of the two inputs of the control unit is connected to a corresponding input terminal of the entire device,
• The generator of inclusion, whose control inputs are connected to the outputs of the control unit,
• Thyristor, whose control terminals are connected to the terminals of the turn-on generator,
• A transistor was inserted, between the collector and the base of which the thyristor trunk terminals are connected,
• A trip generator is introduced whose control inputs are connected to the outputs of the control unit, and the output to the base of the transistor,
• Four gates are formed, forming a full-wave bridge rectifier connected by input terminals between one input of the above input and one output pole of the entire device, and a transistor is connected between the output terminals of the bridge rectifier, the other input terminal from the above input poles of the entire device is connected to the other Output pole of the entire device.

In the first particular embodiment , an asymmetric separation support block is additionally introduced, the two inputs of which are connected to the input and output poles of the entire device, between which the above-mentioned bridge rectifier is connected, the output of the asymmetry detection unit is the second input of the entire device.

In the second particular case of execution, a matching element is additionally introduced into the control unit, the zero-point voltage detection element is connected to the inputs of the process mode, the inputs of the matching element are the inputs of the control unit, and the outputs are connected to the inputs of the threshold element and the elements for determining the voltage transition through zero, Process are outputs of an agreed block.

The technical result that can be obtained in the implementation of the third invention is similar to the technical result that can be obtained by the implementation of the first invention.

FIG. 1 is an electrical diagram of an apparatus according to the first invention

2, timing diagrams of operation of the device

3, electrical diagrams of the asymmetry detection units

FIG. 4 shows the electrical diagrams of an on-off generator and trip generators

5 shows an electrical circuit of a mode processor

FIG. 6 is an electrical diagram of an apparatus according to the second invention

FIG. 7 is an electrical diagram of an apparatus according to the third invention

The device for protecting an electric consumer against overvoltage ( FIG. 1 ) comprises an on-off generator 1, a tripping generator 2, an asymmetry detection unit 3, a control unit 4 whose output is connected to the control inputs of the switch-on generator 1 and the tripping generator 2, contains thyristors 5 and 6, The output of the turn-on generator 1 is connected to the thyristor control terminal 5, and the second to the thyristor control terminal 6, contains the diodes 7 and 8, the cathode of the diode 7 is connected to the anode of the thyristor 5, and the cathode of the diode 8 to the thyristor anode 6, contains the transistors 9 and 10, The output of the trip generator 2 is connected to the base of the transistor 9 and the cathode of the thyristor 5, and the second to the meringue of the transistor 10 and the cathode of the thyristor 6, the collector of the transistor 9 is connected to the cathode of the diode 7, and the collector of the transistor 10 with the cathode of the diode 8, the emitter of the transistor 9 is connected to the diode anode 7, and the emitter of the transistor 10 with the anode of the diode 8, the first input of the asymmetry detection unit is connected to the anode of the diode 7, the second to the cathode of the diode 7, the third to the cathode of the diode 8, the fourth to the anode of the diode 8. The control unit 4 includes: the threshold element 11 , The comparator 12 as an element for determining the voltage transition through zero, the mode processor 13 whose output is the output of the control unit 4 and the matching element 14 whose inputs are inputs of the control unit 4 and the outputs are connected to the inputs of the element 11 and the comparator 12, the output of the threshold element 11 is connected to the first input of the mode processor 13 and the output of the comparator 12 to the second input of the mode processor 13. The first input of the control unit 4 is connected to the first input terminal 15 and to the emitter of the transistor 9 and the second to the second input pole 16 and to the emitter of the transistor 10 , The collector of the transistor 9 is connected to the first output pole 17, and the collector of the transistor 10 to the second output terminal 18, the load 19 is connected to the output poles 17, 18.

DEVICE WORKS AS FOLLOWING

If the voltage at the second input terminal 16 is positive with respect to the first pole 15 and does not exceed a predetermined level (Fig.2a), then the pulses of the switching generator 1 are present ( Fig.2, e ), while if the load 19 is resistive, the thyristor 5, the transistor 9 is opened, and therefore the current flows through the second input pole 16, the diode 8, the second output pole 18, the load 19, the first output pole 17, the transistor 9 and the thyristor 5, the first input pole 15. The switching generator pulses 1 appear at its outputs from a certain moment of transition of the input voltage through zero on the signal from the output of the control unit 4 ( Fig.2, d ) after a certain time from the moment of input of the input voltage, which is set by the mode processor 13. The moment of the transition of the input voltage through zero is determined by the comparator 12.

If the voltage at the input of the device exceeds the threshold, then, upon a signal from the threshold element 11 ( Fig.2, c ), the mode processor 13 issues a deflection command, while the signals from the control unit 4 lose the pulses at the outputs of the turn-on generator 1, and at the outputs of the generator A single impulse of deflection appears, while the transistor 9 opens up to saturation and thus turns off the thyristor 5, after the end of the deflection pulse, the transistor 9 closes and provides a load 19.

If the device is operating in a mode of no-limit deviation, then the user is switched on again ( Fig. 2, g ).

If the device is operating in the reclosing mode, then from a certain moment of transition of the input voltage zero after some time from the moment of shutdown, set by the mode processor 13, the device reconnects the load 19 to the network.

If the device is operating in the stabilization mode, then from the moment when the input voltage falls below the threshold, then the signal processor from the threshold element 11 ( Fig.2, c ) is instructed to switch on, with the signal from the control unit 4 appearing pulses on Outputs of the switching-on generator 1 ( Fig.2, d ), thus the load 19 is again connected to the network.

If the voltage at the second input terminal 16 is negative with respect to the first input terminal 15 and the load 19 is resistive, then the operation of the device is determined by the thyristor 6, the transistor 10 and the diode 7. The operation of the device is similar to that described above.

The asymmetry detection unit 3 ( FIG. 3, a ) comprises a differential amplifier 20, a threshold element 21, a trigger 22 connected in a cascade manner, comprising a capacitor 23 connected between the inputs of the differential amplifier, comprising four resistors 24, 25, 26, 27. One of the terminals The resistor 24 is connected to the positive input of the differential amplifier 20 and the second terminal is the first input of the unit 3, one of the terminals of the resistor 25 is connected to the minus input of the differential amplifier 20, and the second terminal is the second input of the unit 3, one of the terminals of the resistor 26 is connected to the positive input Of the differential amplifier 20, and the second terminal is the third input of the unit 3, one of the terminals of the resistor 27 is connected to the minus input of the differential amplifier 20, and the second terminal is the fourth input of the block 3. The output of the asymmetry detection unit 3 is the second output of the entire device.

If the average value of the voltage between the first and second inputs of the unit 3 is different from the average value of the voltage between the fourth and third inputs of the unit 3 by a magnitude greater than the set value, the signal of the switching trigger 22 appears in the output of the threshold device 21 to another state.

The switching generator 1 ( Fig.4, a ) comprises a multivibrator 28 and two capacitors 29 and 30. One of the terminals of each capacitor is connected to the output of the multivibrator 28, the second terminal of the capacitor 29 is the first output of the switch-on generator 1 and the second terminal of the capacitor 30 by the second output of the generator The control input of the multivibrator is the input of the control of the switch-on generator 1.

The switch-on generator 2 (Fig.4b) comprises a single-vibrator 31 and two capacitors 32 and 33. One of the terminals of each capacitor is connected to the output of the univibrator 31, the second terminal of the capacitor 32 is the first output of the tripping generator 2 and the second terminal of the capacitor 33 by the second output of the generator 2. The start-up input of the univibrator 31 is the control input of the trip generator 2.

The multivibrator 28 and the univibrator 31 can be calculated according to the procedure described in [4]

The threshold element 11 and the threshold element 21 can be constructed using two comparators.

As the matching element 14, a resistive or capacitive divider, and a transformer, can be used.

The mode processor 13 ( FIG. 5 ) includes four NOR gate NOS 34-37, two logic inverters 38 and 39, an exclusive OR gate 40, one NOR gate 41, two RS flip-flops 42 and 43 , Counter 44, three resistors 45-47 and three capacitors 48-50.

Depending on the state of the second inputs of elements 34 and 41, three operating modes are implemented in accordance with the table below.

A device is provided on the element 41, the resistor 45, and the capacitor 48, which generates short pulses along the front and immediately pulses at its input ( Вх.2 ). On the trigger 42, the resistor 46 and the condenser 49, an initial start device is made. When the power is turned on, the flip-flop 42 is set to a state where the voltage at its output corresponds to a logic one.

Switching of the trigger to another state is carried out by pulses from the element 40, whose output is connected to the input R of the flip-flop 42 after some time from the moment of supply of the supply voltage. If a voltage corresponding to logic 1 is present at the output of the flip-flop 42, then the trigger state 43 is set through the elements 36 and 38, at which the voltage at its inverted output corresponds to a logic one, and at the same time, by means of the element 37, the signal passes to the output from the flip-flop 43.

If there is a voltage corresponding to the logic 0 at the second input of the element 41, after switching the flip-flop 43 by the signal from the first input of the processor 13, the counter 44 starts counting the pulses that are fed to its input C from the cell 40. The count occurs until the corresponding voltage 1, after that a short pulse, the duration of which is determined by the resistor 47 and the capacitor 50, through the elements 39 and 41, the counter 44 is reset to its original state. If the voltage at the second input of the element 35 and the S input of the trigger 43 corresponds to a logic value of 0, then the switching of the flip-flop 43 occurs through the above-mentioned pulse from the output of the counter 44 through the elements 35, 34, 36, 38. In this way, the reclosing mode is realized.

If there is a voltage corresponding to the logic 1 at the second input of the element 41 and corresponding to the logic 0 on the second input of the element 35, the reverse switching of the trigger 43 can occur only when the power supply is re-turned on. Thus, the mode of unlimited shutdown is realized.

If there is a voltage corresponding to the logical one at the second input of the element 35, the reverse switching of the flip-flop 43 occurs by the input signal from the first input of the mode processor 13 through the elements 34, 36, 38. Thus, the stabilization mode is realized.

The device for protecting an electric consumer against overvoltage ( FIG. 6 ) comprises an ON generator 1, a trip generator 2, an asymmetry detection unit 3, a control unit 4 whose output is connected to the control inputs of the ON generator 1 and the OFF generator 2, contains thyristors 5 and 6, The output of the turn-on generator 1 is connected to the thyristor control terminal 5 and the second to the thyristor control terminal 6, contains the diodes 7 and 8, the cathode of the diode 7 is connected to the anode of the thyristor 5, and the anode of the diode 8 to the cathode of the thyristor 6 contains the transistors 9 and 10, The output of the trip generator is connected to the base of the transistors 9 and to the cathode of the thyristor 5 and the second to the base of the transistor 10 and to the anode of the thyristor 6, the collector of the transistor 9 is connected to the cathode of the diode 7, and the collector of the transistor 10 with the anode 8, the emitter of the transistor 9 is connected to the emitter Transistor 10 and with the first input of the asymmetry detection unit 3, the anode of the diode 7 is connected to the cathode of the diode 8 and to the second input of the asymmetry detection unit 3.

The control unit 4 includes: a threshold element 11, a comparator 12 as an element for determining the voltage transition through zero, a mode processor 13 whose output is the output of the control unit 4 and a matching element 14 whose inputs are the inputs of the control unit 4 and the outputs are connected to The inputs of the element 11 and the comparator 12. The output of the threshold element 11 is connected to the first input of the mode processor 13 and the output of the comparator 12 to the second input of the mode processor 13. The first input of the control unit 4 is connected to the first input terminal 15 and to the emitter of the transistor 9, To the second input pole 16, the anode of the diode 7 is connected to the first output pole 17 and the second input terminal 16 is connected to the second output terminal 18, the load 19 is connected to the output poles 17, 18.

DEVICE WORKS AS FOLLOWING

If the voltage at the second input pole 16 is positive relative to the first pole 15 and does not exceed a predetermined level (Fig.2a), then the pulses of the switching generator 1 are pulses ( Fig. 2, d ). In this case, if the load 19 is resistive, then the thyristor 5 is open, and consequently the transistor 9 is opened, the current flowing through the second input pole 16, the second output pole 18, the load 19, the first output pole 17, the diode 7, the transistor 9 and the thyristor 5 , The first input pole 14. The pulses of the turn-on generator 1 appear on its inputs from a certain moment of the input voltage transition through zero at a signal from the output of the control unit 4 ( Fig.2, d ) some time after the input voltage supply, which is set by the mode processor 13 The moment of transition of the input voltage through zero is determined by the comparator 12.

If the voltage at the input of the device exceeds the threshold, then at the signal c of the threshold element 11 ( Fig.2, c ), the mode processor 13 issues a deviation command, while the signals from the control unit 4 lose the pulses at the outputs of the turn-on generator 1, and at the outputs of the generator Off 2, single tripping pulses occur, the transistor 9 is opened until saturation and thus the thyristor 5 is turned off, after the end of the tripping pulse, the transistor 9 closes and de-energizes the load.

If the device operates in the mode of perpetual disconnection, then the user is switched on again ( Fig. 2, f ).

If the device operates in the reclosing mode, then from a certain moment of the input voltage transition through zero after some time from the moment of disconnection, set by the mode processor 13, the device reconnects the load 19 to the network.

If the device is operating in the stabilization mode, from the moment when the input voltage falls below the threshold voltage, at the signal from the threshold element 11 ( Fig.2, c ), the mode processor 13 gives the command to turn on, and on the signal from the control unit 4 pulses appear at the outputs Generator 1 ( figure 2, e ), thus, the load 19 is again connected to the network.

If the voltage at the second input terminal 16 is negative with respect to the first input pole 15 and the load 19 is resistive, then the operation of the device is determined by the thyristor 6, the transistor 10 and the diode 8. The operation of the device is similar to that described above.

The asymmetry detection unit ( Figure 3b ) comprises a differential amplifier 20, a threshold element 21, a trigger 22 included in a cascade, comprises a capacitor 23 connected between the inputs of the differential amplifier 20, comprises two resistors 24, 25, one of the terminals of the resistor 24 is connected to a positive The input of the differential amplifier 20, and the second terminal is the first input of the unit 3, one of the terminals of the resistor 25 is connected to the minus input of the differential amplifier 20, and the second terminal is the second input of the block 3. The output of the asymmetry detection unit 3 is the second output of the entire device.

The switch-off generator 1 of the device ( Figure 6) is similar to the switch-on generator 1 of the device ( Figure 1 ) described above.

The trip generator 2 ( Fig.4, c ) comprises a single-vibrator 31 and two capacitors 32 and 33. One of the terminals of the capacitor 32 is connected to the output of the univibrator 31 and the second terminal is the first output of the trip generator 2, one of the terminals of the capacitor 33 is connected to an inverted output Monostable 31, and the second terminal is the second output of the trip generator 2.

The single-vibrator 31 can be calculated by the method described in [4]

The matching element 14, the threshold elements 11, 23 and the mode processor 13 of the device ( Figure 6 ) are similar to the matching element 14, the threshold elements 11, 23 and the mode processor 13 of the device (Figure 1) described above.

The device for protecting an electric consumer against overvoltage ( FIG. 7 ) comprises an on-off generator 1, a trip generator 2, an asymmetry detection unit 3, a control unit 4 whose output is connected to the control inputs of the switch-on generator 1 and the trip generator 2, contains a thyristor 5, Which connects the output of the switch-on generator 1, contains a transistor 10 to which the output of the trip generator 2 and the thyristor cathode 5 are connected, contains four diodes 6 9 forming a full-wave bridge rectifier, the cathodes of the diodes 6 and 7 are connected and connected to the anode of the thyristor 5 and the collector of the transistor 10, the anodes of the diodes 9 and 8 are connected and connected to the emitter of the transistor 10. The first input of the asymmetry detection unit 3 is connected to the cathode of the diodes 9 and to the anode of the diode 6, the second input of the asymmetry detection unit 3 is connected to the cathode of the diode 8 and the diode anode 7. The control unit 4 includes: a threshold element 11, a comparator 12 as an element for determining the voltage transition through zero, a mode processor 13 whose output is the output of the control unit 4 and a matching element 14 whose inputs are inputs of the control unit 4 and the outputs are connected to the inputs of the element 11 and comparator 12, the output of the threshold element 11 is connected to the first input of the mode processor 13 and the output of the comparator 12 to the second input of the mode processor 13. The first input of the control unit 4 is connected to the first input pole 15 and to the anode of the diode 6, the second to the second input pole 16, the anode of the diode 7 is connected to the first output pole 17 and the second input terminal is connected to the second output terminal 18, the load 19 is connected to the output poles 17 and 18.

DEVICE WORKS AS FOLLOWING

If the voltage at the second input terminal 16 is positive with respect to the first pole 15 and does not exceed a predetermined level ( Figure 2a ), then the output of the turn-on generator 1 has pulses ( Fig.2, d ), the thyristor 5 is open, and hence the transistor 10, and if the load 19 is resistive, the current flows through the second input pole 16, the second output pole 18, the load 19, the diode 7, the transistor 10 and the thyristor 5, the diode 9, the first input terminal 15. The pulses of the turn-on generator appear at its output From a certain moment of transition of the input voltage through zero on the signal from the output of the control unit 4 ( Fig.2, d ) after a certain time from the moment of input of the input voltage, which is set by the mode processor 13. The moment of the transition of the input voltage through zero is determined by the comparator 12.

If the voltage at the input of the device exceeds the threshold, then the signal from the threshold element 11 ( Fig.2, c ) the mode processor 13 issues a trip command, at the signal from the control unit 4, the pulses at the output of the switch-on generator 1 are lost, and at the output of the generator Off 2, a single tripping pulse appears, while the transistor 9 opens up to saturation and thus turns off the thyristor 5, after the end of the tripping pulse, the transistor 9 closes and provides a load 19.

If the device operates in the mode of perpetual shutdown, then the user can be re-enabled.

If the device operates in the reclosing mode, then from a certain moment of the input voltage transition through zero after some time from the moment of disconnection, set by the mode processor 13, the device reconnects the load 19 to the network.

If the device is operating in the stabilization mode, from the moment when the input voltage falls below the threshold, at the signal from the threshold element 11 ( Fig.2, c ), the mode processor 13 issues an activation command, with the signal from the control unit 4 ( Figure 2 , D) pulses appear at the output of the turn-on generator ( Fig. 2, d ). Thus, the load 19 is again connected to the network.

If the voltage at the second input terminal 16 is negative with respect to the first input terminal 15 and the load 19 is resistive, then the operation of the device is determined by a diode 6, a thyristor 5, a transistor 10 and a diode 8. The operation of the device is similar to that described above.

The asymmetry detection unit 3 of the device ( Figure 7 ) is similar to the device asymmetry detection unit ( Figure 6 ) described above.

The switch-on generator 1 and the device shutdown generator 2 ( FIG. 7 ) are similar to the power-on generator 1 and the device 2 shutdown generator ( FIG. 1 ) described above.

The second inputs of the switch-on generator 1 and the trip generator 2 in the device ( Figure 7 ) are not used.

The matching element 14, the threshold elements 11, 23 and the mode processor 13 of the device ( Figure 7 ) are similar to the matching element 14 to the threshold elements 11, 23 and to the mode processor 13 ( Figure 1 ) of the device described above.

CLAIM

1. A device for protecting an electric consumer from overvoltage in the power network, comprising a control unit including a threshold element, each of the two inputs of the control unit is connected to the corresponding input pole of the entire device, an on-off generator whose control input is connected to the corresponding output of the control unit, two thyristors, The control leads of which are connected to the outputs of the switching generator, differing in that two transistors are inserted, between the collector and the base of each of which a thyristor is connected by trunk terminals, a trip generator whose control input is connected to the corresponding output of the control unit, and each of the two outputs to the base Corresponding to the transistor, two valves, each of which is connected between the emitter and the collector of the corresponding transistor, two similar valve outputs are connected to two input poles, and two others to the two output poles of the entire device, with each valve terminal connected to the corresponding pole terminal.

2. The device according to claim 1, characterized in that an asymmetry detection unit having two pairs of inputs is input, one of the inputs of each pair is connected to the anode and the other to the cathode of the corresponding valve pair from the above valves, the output of the asymmetry detection unit is the second output of the entire device .

3. A device for protecting an electric consumer from overvoltages in a power network, comprising a control unit including a threshold element, each of the two inputs of the control unit is connected to the corresponding input pole of the entire device, an on-board generator whose control input is connected to the corresponding output of the control unit, two thyristors, The control leads of which are connected to the outputs of the on-off generator, characterized in that two transistors are inserted, between the collector and the base of each of which is connected by trunk terminals a corresponding thyristor transistor, a trip generator whose control input is connected to the corresponding output of the control unit, and the outputs to the bases of transistors, Two valves, through each of which between the one input of the above input and one output pole of the entire device, a tripping transistor is connected to the main leads by a trunk terminal, in which two valves, collector and emitter junctions of the two transistors are connected, the valves are switched on according to the other input The pole of the entire device from the above two input poles is connected to the other output pole of the entire device.

4. The device according to claim 3, characterized in that an asymmetry detection unit is input, the two inputs of which are connected to the input and output poles of the entire device, between which the above transistors are connected, the output of the asymmetry detection unit is the second output of the entire device.

5. A device for protecting an electric consumer from overvoltage in the power network, comprising a control unit including a threshold element, each of the two inputs of the control unit is connected to the corresponding input pole of the entire device, an on-off generator whose control input is connected to the output of the control unit, a thyristor, Which is connected to the corresponding output of the turn-on generator, characterized in that a transistor is inserted, between the collector and the base of which the thyristor main outputs are connected, a trip generator whose control input is connected to the corresponding output of the control unit, and the output to the transistor base, four valves forming a full-wave bridge A rectifier connected by the input terminals between one input from the above input and one output pole of the entire device, a transistor is included between the output terminals of the bridge rectifier, the other input terminal of the above-mentioned input poles of the entire device is connected to the other output pole of the entire device.

6. The device according to claim 5, characterized in that an asymmetry detection unit is input, two inputs of which are connected to the input and output poles of the entire device, between which the above-mentioned bridge rectifier is connected, and the output of the asymmetry detection unit is the second output of the entire device.

7. The device as claimed in claim 1 or 3, or 5, characterized in that a matching element, zero voltage transition point and a mode processor are input to the control unit, the outputs of the threshold element and the zero voltage sense detection element are connected to the inputs of the mode processor, the inputs Matching elements are the inputs of the control unit, and the outputs are connected to the inputs of the threshold element and the voltage transition detection element through zero, the outputs of the mode processor are the outputs of the matching block.

print version
Date of publication 25.11.2006гг

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