CN109950880B - A highly reliable residual current protection device control circuit - Google Patents
A highly reliable residual current protection device control circuit Download PDFInfo
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- CN109950880B CN109950880B CN201910224636.7A CN201910224636A CN109950880B CN 109950880 B CN109950880 B CN 109950880B CN 201910224636 A CN201910224636 A CN 201910224636A CN 109950880 B CN109950880 B CN 109950880B
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- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 10
- 230000005669 field effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
本发明提出了一种高可靠的剩余电流保护装置控制电路，包括脱扣器、电子脱扣电路、电磁脱扣电路、控制电路、二极管D1、电容C1；电子脱扣电路与脱扣器通过二极管D1连接，电磁脱扣电路与脱扣器通过电容C1连接，电子脱扣电路和电磁脱扣电路之间通过二极管D1和电容C1连接，脱扣器与电磁脱扣电路之间连接有可控制电磁脱扣电路断开或短路的开关K1，控制电路与开关K1和电子脱扣电路连接，控制电路通过检测电子脱扣电路的工作电压来控制开关K1的断开或短路。
The present invention proposes a highly reliable control circuit of a residual current protection device, comprising a tripper, an electronic tripping circuit, an electromagnetic tripping circuit, a control circuit, a diode D1, and a capacitor C1; the electronic tripping circuit is connected to the tripper through the diode D1, the electromagnetic tripping circuit is connected to the tripper through the capacitor C1, the electronic tripping circuit and the electromagnetic tripping circuit are connected through the diode D1 and the capacitor C1, a switch K1 which can control the electromagnetic tripping circuit to be disconnected or short-circuited is connected between the tripper and the electromagnetic tripping circuit, the control circuit is connected to the switch K1 and the electronic tripping circuit, and the control circuit controls the disconnection or short-circuit of the switch K1 by detecting the working voltage of the electronic tripping circuit.
Description
Technical Field
The invention relates to the technical field of circuit breaker control circuits, in particular to a high-reliability control circuit of a residual current protection device.
Background
The residual current circuit breakers on the market are mainly classified into two types, namely residual current circuit breakers related to a power supply voltage (also called an electronic type) and residual current circuit breakers unrelated to the power supply voltage (also called an electromagnetic type).
In the residual current circuit breaker irrelevant to the power supply voltage, the signal induced by the transformer is not only a leakage signal but also is used as the driving energy of the release, the leakage protection can be realized without a power supply, the safety is high, but the surge current resistance capability is poor, the function is single, and only the AC type and A type leakage protection can be realized.
The residual current circuit breaker related to the power supply voltage uses an electronic circuit board, so that not only can AC type and A type leakage protection be realized, but also B type leakage protection can be realized, but the protection function is invalid under the condition of only one live wire.
Disclosure of Invention
Aiming at the problems pointed out in the background art, the invention provides a high-reliability residual current protection device control circuit, which enables an electronic tripping circuit signal and an electromagnetic tripping signal to act on a tripper without mutual interference through the reverse isolation action of a diode D1 and the blocking action of a capacitor C1, realizes a double-input and single-drive circuit, and effectively combines a residual current action circuit breaker related to power supply voltage with a residual current action circuit breaker unrelated to the power supply voltage. Meanwhile, in order to solve the problem of poor anti-surge current capability of the electromagnetic residual current circuit breaker, the invention improves the requirement of high reliability after combination, monitors the power supply voltage of the circuit, realizes the work of the electronic tripping circuit when the power supply voltage is higher than a set value, shields the signal of the electromagnetic tripping circuit, and automatically unlocks the shielding of the electromagnetic circuit when only one live wire exists, thereby realizing the protection function of the product under low voltage.
The technical scheme of the invention is realized as follows:
A high-reliability residual current protection device control circuit comprises a release, an electronic release circuit, an electromagnetic release circuit, a diode D1 and a capacitor C1, wherein the electronic release circuit is connected with the release through the diode D1, the electromagnetic release circuit is connected with the release through the capacitor C1, and the electronic release circuit is connected with the electromagnetic release circuit through the diode D1 and the capacitor C1.
The invention further provides a control circuit and a switch K1, wherein the switch K1 capable of controlling the electromagnetic trip circuit to be opened or short-circuited is connected between the release and the electromagnetic trip circuit, the control circuit is connected with the switch K1 and the electronic trip circuit, and the control circuit controls the opening or short-circuited of the switch K1 by detecting the working voltage of the electronic trip circuit.
The invention is further arranged that the control circuit comprises a resistor R2, a resistor R3, a voltage detector Q2, a resistor R4 and a resistor R5;
One end of a resistor R2 is respectively connected with the power supply circuit and the electronic tripping circuit, and the other end of the resistor R2 is respectively connected with one end of a resistor R3 and a voltage detector Q2;
the other end of the resistor R3 is respectively connected with a power circuit, a voltage detector Q2, one end of a resistor R5, an emitter of a switch K1, a release and an electronic release circuit;
The voltage detector Q2 is connected with one end of the resistor R4, the power circuit, one end of the resistor R5, the emitter of the switch K1, the release and the electronic release circuit;
The other end of the resistor R4 is connected with the other end of the resistor R5 and the base electrode of the switch K1;
One end of a resistor R5 is connected with the base electrode of the switch K1, and the other end of the resistor R5 is connected with a power circuit, the emitter electrode of the switch K1, a release and an electronic release circuit;
The collector of the switch K1 is connected with the electromagnetic tripping circuit and the capacitor C1, and the emitter of the switch K1 is connected with the power supply circuit, the tripper and the electronic tripping circuit.
The invention is further provided with a high-voltage detection control circuit which is connected between the power supply circuit and the control circuit;
The high-voltage detection control circuit comprises a triode Q1, a resistor R1 and a voltage stabilizing tube Z1, wherein the base electrode of the triode Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the voltage stabilizing tube Z1, the other end of the voltage stabilizing tube Z1 is respectively connected with a power supply circuit, a control circuit, an emitting electrode of a switch K1, a release and an electronic release circuit, the collecting electrode of the triode Q1 is connected with the control circuit and the electronic release circuit, and the emitting electrode of the triode Q1 is connected with the power supply circuit.
The invention further provides a high-voltage detection control circuit, which comprises a triode Q1, a resistor R1 and a voltage stabilizing tube Z1, wherein the base electrode of the triode Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the voltage stabilizing tube Z1, the other end of the voltage stabilizing tube Z1 is respectively connected with a power circuit, a control circuit, an emitter electrode of a switch K1, a release and an electronic release circuit, the emitter electrode of the triode Q1 is connected with one end of the resistor R2 and the power circuit, and the collector electrode of the triode Q1 is connected with the electronic release circuit.
The invention is further arranged that the switch K1 can be a triode, a field effect transistor or a relay.
By adopting the technical scheme, the invention has the beneficial effects that:
The invention provides a high-reliability residual current protection device control circuit, wherein an electronic driving signal enables an electronic tripping circuit signal and an electromagnetic tripping signal to act on a tripper without mutual interference through the reverse isolation action of a diode D1 and the blocking action of a capacitor C1, so that a double-input and single-driving circuit is realized, and a residual current action circuit breaker related to a power supply voltage and a residual current action circuit breaker unrelated to the power supply voltage are effectively combined together;
The electronic circuit works when the power supply voltage is higher than a set value by further monitoring the power supply voltage of the circuit, the electromagnetic tripping circuit signal is shielded, and when only one live wire exists, the electromagnetic circuit is automatically shielded, so that the product has a protection function under no voltage.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a circuit diagram of the present invention;
FIG. 2 is a circuit diagram of the present invention;
FIG. 3 is a schematic diagram of the delay time in the present invention;
FIG. 4 is a circuit diagram of the present invention;
FIG. 5 is a circuit diagram of the present invention;
FIG. 6 is a circuit diagram of the present invention;
Fig. 7 is a circuit diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is illustrated below with reference to fig. 1-7:
A high-reliability residual current protection device control circuit comprises a release, an electronic release circuit, an electromagnetic release circuit, a diode D1 and a capacitor C1, wherein the electronic release circuit is connected with the release through the diode D1, the electromagnetic release circuit is connected with the release through the capacitor C1, and the electronic release circuit is connected with the electromagnetic release circuit through the diode D1 and the capacitor C1.
The electronic tripping driving signal can lead the electronic tripping circuit signal and the electromagnetic tripping signal to be applied to the tripping device without mutual interference through the reverse isolation action of the diode D1 and the blocking action of the capacitor C1, thereby realizing a double-input and single-driving circuit and effectively combining a residual current action breaker related to the power supply voltage with a residual current action breaker unrelated to the power supply voltage.
When the electronic tripping circuit detects the leakage signal and outputs a direct current signal to drive the tripper through the diode D1, the capacitor C1 plays a role in blocking the direct current, so that the output electronic tripping signal cannot be interfered by the electromagnetic tripping circuit.
When the electromagnetic tripping circuit detects a leakage signal and outputs an alternating current signal to drive the release through the capacitor C1, the diode D1 is reversely cut off, so that the output electromagnetic tripping signal cannot be interfered by the electronic tripping circuit.
The control circuit is connected with the switch K1 and the electronic tripping circuit, and the control circuit controls the disconnection or short circuit of the switch K1 by detecting the working voltage of the electronic tripping circuit.
In order to solve the problem of poor current flowing resistance of the electromagnetic residual current circuit breaker and improve the requirement of high reliability after combination, the invention further provides a switch K1 which is connected between the release and the electromagnetic release circuit and can shield the electromagnetic release circuit, and the switch K1 is controlled by a control circuit.
The control circuit comprises a resistor R2, a resistor R3, a voltage detector Q2, a resistor R4 and a resistor R5.
One end of a resistor R2 is respectively connected with the power supply circuit and the electronic tripping circuit, and the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the voltage detector Q2.
The other end of the resistor R3 is respectively connected with a power circuit, a voltage detector Q2, one end of the resistor R5, an emitter of the switch K1, a release and an electronic release circuit.
The voltage detector Q2 is connected to one end of the resistor R4, the power supply circuit, one end of the resistor R5, the emitter of the switch K1, the trip unit, and the electronic trip circuit.
The other end of the resistor R4 is connected with the other end of the resistor R5 and the base electrode of the switch K1.
One end of a resistor R5 is connected with the base electrode of the switch K1, and the other end of the resistor R5 is connected with a power circuit, the emitter electrode of the switch K1, a release and an electronic release circuit.
The collector of the switch K1 is connected with the electromagnetic tripping circuit and the capacitor C1, and the emitter of the switch K1 is connected with the power supply circuit, the tripper and the electronic tripping circuit.
The resistor R2 and the resistor R3 in the control circuit divide the power supply voltage of the electronic tripping circuit and then detect the power supply voltage by the voltage detector Q2.
When the power voltage of the electronic tripping circuit is higher than a set value V2, the control circuit outputs a control signal after T2 delay, controls the switch K1 to short-circuit or disconnect the electromagnetic tripping circuit, and shields the signal of the electromagnetic tripping circuit.
When only one live wire exists, the power supply of the electronic tripping circuit does not work, the power supply voltage is lower than the set value voltage V1, the control circuit outputs a control signal, the control switch K1 cancels the shielding electromagnetic tripping circuit, and the electromagnetic tripping circuit works normally.
In the design, the voltage V1 and the voltage V2 may be equal or unequal.
The high-voltage detection control circuit is connected between the power supply circuit and the control circuit.
The high-voltage detection control circuit comprises a triode Q1, a resistor R1 and a voltage stabilizing tube Z1, wherein the base electrode of the triode Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the voltage stabilizing tube Z1, the other end of the voltage stabilizing tube Z1 is respectively connected with a power supply circuit, a control circuit, an emitting electrode of a switch K1, a release and an electronic release circuit, the collecting electrode of the triode Q1 is connected with the control circuit and the electronic release circuit, and the emitting electrode of the triode Q1 is connected with the power supply circuit.
The high-voltage detection control circuit comprises a triode Q1, a resistor R1 and a voltage stabilizing tube Z1, wherein the base electrode of the triode Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the voltage stabilizing tube Z1, the other end of the voltage stabilizing tube Z1 is respectively connected with a power supply circuit and a control circuit, an emitting electrode of a switch K1, a release and an electronic trip circuit, the emitting electrode of the triode Q1 is connected with one end of the resistor R2 and the power supply circuit, and the collecting electrode of the triode Q1 is connected with the electronic trip circuit. The switch K1 may be a triode, a field effect transistor, or a relay.
When the output voltage Vcc of the power supply circuit after passing through the power supply conversion circuit is larger than a set value and is also larger than the voltage stabilizing tube Z1, the triode Q1 is conducted, and the electronic tripping circuit starts working after being electrified. Meanwhile, the voltage detector Q2 samples the voltage V+ through the resistor R2 and the resistor R3, if the voltage V+ is larger than a set value, the voltage detector Q2 outputs a signal, the switch K1 is turned on, the leakage signal provided by the electromagnetic tripping circuit is closed, and the leakage signal provided by the electromagnetic tripping circuit can not drive the tripper.
When only one live wire is needed, the power supply conversion circuit cannot work, the voltage Vcc is 0V, when the voltage Vcc is smaller than the voltage stabilizing tube Z1, the triode Q1 is not conducted, the voltage V+ is also 0V, the voltage Vcc is smaller than the working voltage of the electronic tripping circuit, the electronic tripping circuit stops working, the leakage signal of the electronic tripping circuit cannot play a role in protection, meanwhile, the voltage V+ is smaller than the sampling voltage point set by the voltage detector Q2, the voltage detector Q2 has no output signal, the switch K1 is not conducted, the closing of the electromagnetic tripping circuit is released, and the leakage signal of the electromagnetic circuit provides leakage protection.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (4)
1. The high-reliability residual current protection device control circuit is characterized by comprising a release, an electronic release circuit, an electromagnetic release circuit, a diode D1 and a capacitor C1, wherein the electronic release circuit is connected with the release through the diode D1, the electromagnetic release circuit is connected with the release through the capacitor C1, the electronic release circuit is connected with the electromagnetic release circuit through the diode D1 and the capacitor C1, the high-reliability residual current protection device control circuit also comprises a control circuit and a switch K1, a switch K1 capable of controlling the electromagnetic release circuit to be disconnected or short-circuited is connected between the release and the electromagnetic release circuit, the control circuit is connected with the switch K1 and the electronic release circuit, and the control circuit controls the disconnection or short-circuit of the switch K1 by detecting the working voltage of the electronic release circuit, and comprises a resistor R2, a resistor R3, a voltage detector Q2, a resistor R4 and a resistor R5;
One end of a resistor R2 is respectively connected with the power supply circuit and the electronic tripping circuit, and the other end of the resistor R2 is respectively connected with one end of a resistor R3 and a voltage detector Q2;
the other end of the resistor R3 is respectively connected with a power circuit, a voltage detector Q2, one end of a resistor R5, an emitter of a switch K1, a release and an electronic release circuit;
The voltage detector Q2 is connected with one end of the resistor R4, the power circuit, one end of the resistor R5, the emitter of the switch K1, the release and the electronic release circuit;
The other end of the resistor R4 is connected with the other end of the resistor R5 and the base electrode of the switch K1;
One end of a resistor R5 is connected with the base electrode of the switch K1, and the other end of the resistor R5 is connected with a power circuit, the emitter electrode of the switch K1, a release and an electronic release circuit;
The collector of the switch K1 is connected with the electromagnetic tripping circuit and the capacitor C1, and the emitter of the switch K1 is connected with the power supply circuit, the tripper and the electronic tripping circuit.
2. The control circuit of a highly reliable residual current device according to claim 1, further comprising a high voltage detection control circuit connected between the power supply circuit and the control circuit;
The high-voltage detection control circuit comprises a triode Q1, a resistor R1 and a voltage stabilizing tube Z1, wherein the base electrode of the triode Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the voltage stabilizing tube Z1, the other end of the voltage stabilizing tube Z1 is respectively connected with a power supply circuit, a control circuit, an emitting electrode of a switch K1, a release and an electronic release circuit, the collecting electrode of the triode Q1 is connected with the control circuit and the electronic release circuit, and the emitting electrode of the triode Q1 is connected with the power supply circuit.
3. The control circuit of the high-reliability residual current protection device according to claim 1, further comprising a high-voltage detection control circuit, wherein the high-voltage detection control circuit comprises a triode Q1, a resistor R1 and a voltage stabilizing tube Z1, a base electrode of the triode Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the voltage stabilizing tube Z1, the other end of the voltage stabilizing tube Z1 is respectively connected with a power supply circuit, a control circuit, an emitter electrode of a switch K1, a release and an electronic release circuit, an emitter electrode of the triode Q1 is connected with one end of the resistor R2 and the power supply circuit, and a collector electrode of the triode Q1 is connected with the electronic release circuit.
4. A highly reliable residual current protection device control circuit according to claim 2 or 3, wherein the switch K1 is a transistor or a field effect transistor or a relay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224636.7A CN109950880B (en) | 2019-03-23 | 2019-03-23 | A highly reliable residual current protection device control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910224636.7A CN109950880B (en) | 2019-03-23 | 2019-03-23 | A highly reliable residual current protection device control circuit |
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| CN109950880A CN109950880A (en) | 2019-06-28 |
| CN109950880B true CN109950880B (en) | 2025-02-25 |
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| CN201910224636.7A Active CN109950880B (en) | 2019-03-23 | 2019-03-23 | A highly reliable residual current protection device control circuit |
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| CN113257633A (en) * | 2020-02-13 | 2021-08-13 | 浙江正泰电器股份有限公司 | Circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209805410U (en) * | 2019-03-23 | 2019-12-17 | 乐清拓优电气有限公司 | A Highly Reliable Control Circuit of Residual Current Protection Device |
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| CN103563039B (en) * | 2011-05-24 | 2015-11-25 | 三菱电机株式会社 | Electronic circuit breaker |
| CN102354943B (en) * | 2011-09-20 | 2016-12-28 | 广东天富电气股份有限公司 | A working method of an electronic trip device |
| DE102014201501A1 (en) * | 2014-01-28 | 2015-07-30 | Siemens Aktiengesellschaft | External control of an electromagnetic release |
| CN205846688U (en) * | 2016-06-28 | 2016-12-28 | 华通机电股份有限公司 | Small-sized electric leakage overvoltage/undervoltage protection control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209805410U (en) * | 2019-03-23 | 2019-12-17 | 乐清拓优电气有限公司 | A Highly Reliable Control Circuit of Residual Current Protection Device |
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