CN211239315U - Leakage protection circuit based on three-pole disconnection - Google Patents
Leakage protection circuit based on three-pole disconnection Download PDFInfo
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- CN211239315U CN211239315U CN201922205562.0U CN201922205562U CN211239315U CN 211239315 U CN211239315 U CN 211239315U CN 201922205562 U CN201922205562 U CN 201922205562U CN 211239315 U CN211239315 U CN 211239315U
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Abstract
The utility model relates to a leakage protection circuit based on tripolar disconnection, including IC chip, zero sequence transformer ZCT1, zero sequence transformer ZCT2, rectifier DB1, triode Q1, triode Q2, thyristor Q3; and a ground wire E penetrates through the zero sequence transformer ZCT2, and the input end of the ground wire E is connected to an E-IN terminal. When the earth wire E has leakage current, the zero sequence mutual inductor ZCT2 can sense the leakage current and transmit the current to the leakage control circuit, and the leakage control circuit realizes the leakage control of the earth wire; when leakage current exists between the zero line N and the live line L, the light-emitting diode LED1 is on for indication, when the LED1 is on, the switch K1 is switched on, the zero-sequence mutual inductor ZCT1 can sense the leakage current in the lead and can generate current by self induction, a current signal is transmitted to the IC chip, and a signal is sent to the zero-live line leakage control circuit to control the zero-live line leakage current; the whole can realize the control of the earth wire leakage and the leakage between the zero line N and the live line L.
Description
Technical Field
The utility model relates to a power technical field specifically is a leakage protection circuit based on tripolar disconnection.
Background
The existing power supply is connected with mains supply input and supplies power to an electrical appliance after processing the power supply, but when the existing power supply is input, the earth wire of the existing power supply has an electric leakage phenomenon, and the electric leakage phenomenon also exists between the live wire and the zero wire, but the existing equipment cannot detect whether the electric leakage exists between the earth wire and the zero wire, cannot sense an induced current signal, and can not act to process the electric leakage phenomenon.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an earth leakage protection circuit based on tripolar disconnection, whether electric leakage between detectable ground wire electric leakage and zero line N and the live wire L to carry out the electric leakage and show, and control the electric leakage, solved among the prior art on can't the detection ground wire and whether electric leakage between live wire and zero line, and the unable many electric leakage states problem of controlling.
In order to achieve the above object, the utility model provides a following technical scheme: a leakage protection circuit based on triple break comprises an IC chip, a zero sequence transformer ZCT1, a zero sequence transformer ZCT2, a rectifier DB1, a triode Q1, a triode Q2 and a thyristor Q3; a ground wire E penetrates through the zero sequence transformer ZCT2, the input end of the ground wire E is connected to an E-IN terminal, and the output end of the ground wire E is connected to the output of an E-OUT terminal; the input end of the ground wire E is connected to the output ends of the resistor R23 and the resistor R24, the output ends of the resistor R23 and the resistor R24 are connected and then connected to the input end of the diode D1, the output end of the diode D1 is connected to the input end of the light emitting diode LED2, the output end of the light emitting diode LED2 is connected to the input end of the resistor R25 and then connected to the input end of the resistor R26, the output ends of the resistor R25 and the resistor R26 are connected and then connected to the input end of the resistor R27 and then connected to the input end of the resistor R28, and the output ends of the resistor R27 and the resistor R28; a live wire L and a zero wire N penetrate through the zero-sequence transformer ZCT1, the input end of the zero wire N is connected to a power input terminal N, and is connected to the output ends of a thermistor VR1, a resistor R15 and a resistor R18 and a pin 3 connected to a rectifier B1; the input end of the thermistor VR1 is connected to the input end of the live wire L, the input end of the resistor R15 is connected to the output end of the light-emitting diode LED1, the input end of the light-emitting diode LED1 is connected to the output end of the resistor R14, the input end of the resistor R14 is connected to the output end of the diode D2, and the input end of the diode D2 is connected to the input end of the live wire L; the input end of the resistor R18 is connected to the output end of the switch K1, and the output end of the switch K1 is sequentially connected in series with the resistor R17 and the resistor R16, then penetrates through the zero-sequence transformer ZCT1, and then is connected to the input end of the live wire L; a pin 4 of the rectifier DB1 is connected to a pin 3 of the IC chip and is connected to the input end of a resistor R9, and the output end of the resistor R9 is connected to the output end of a zero sequence transformer ZCT 2; a pin 2 of the rectifier DB1 is connected to the output end of the resistor R19, the input end of the resistor R19 is connected to the output end of the tripper L1, and the input end of the tripper L1 is connected to the input end of the live wire L; a pin 1 of the rectifier DB1 is connected to an input end of a resistor R6 and is connected to input ends of a resistor R1, a thyristor Q3, a thermistor VR2 and a switch K2, an output end of the resistor R1 is connected to a pin 8 of the IC chip after being sequentially connected with a resistor R2, a resistor R3 and a resistor R4 in series, an output end of the resistor R4 is connected to an output end of a capacitor C1 and an output end of a zener diode ZD2, and an input end of the capacitor C1 and the zener diode ZD2 are connected and then connected to a pin 3 of the IC chip; a pin 7 of the IC chip is connected to the input end of a diode D4, the output end of a diode D4 is connected to the output end of a diode D3 and is connected to the input end of a resistor R5, the input end of the diode D3 is connected to the input end of a zener diode ZD1, and the output end of the zener diode ZD1 is connected to the output end of a resistor R3; the output end of the resistor R5 is connected to the input end of the capacitor C3, and is connected to the output end of the resistor R11 and the control electrode of the thyristor Q3, and the input end of the resistor R11 is connected to the output end of the diode D5; the output end of the resistor R6 is connected in series with a resistor R7, a resistor R8 and a resistor R22 in sequence and then is connected to the base of the triode Q2 and the collector of the triode A1; the input end of the diode D5 is connected to the collector of the diode Q2 and the output end of the resistor R8, the anode of the thyristor Q3 is connected to the pin 1 of the rectifier DB1, the output end of the capacitor C3, the thermistor VR2, the switch K2 and the cathode of the thyristor Q3 are connected and then connected to the pin 3 of the IC chip; an emitter of the triode Q2 and an emitter of the triode Q1 are both connected to an output end of the resistor R9, an output end of the triode Q1 is connected in series with the resistor R21 and then connected to an input end of the capacitor C5 and connected to an input end of the resistor R10, an output end of the resistor R10 is connected to an input end of the resistor R9, an output end of the capacitor C5 is connected to an input end of the zero sequence transformer ZCT2, and an input end of the resistor R9 is connected to an output end of the zero sequence transformer ZCT 2; the input end of the zero sequence transformer ZCT1 is connected in series with a resistor R12 and then connected to a pin 2 of the IC chip and is connected to the input end of a capacitor C4, and the output end of the zero sequence transformer ZCT1 is connected in series with a resistor R13 and then connected to a pin 1 of the IC chip and is connected to the output end of a capacitor C4.
Preferably, the model of the IC chip is VG 54123B.
Preferably, the model of the triode Q1 and the model of the triode Q2 are both S9013.
Preferably, the thyristor Q3 is JX012N 2.
Compared with the prior art, the beneficial effects of the utility model are as follows:
according to the leakage protection circuit based on the three-pole interruption, when leakage current exists in the ground wire E, the zero sequence transformer ZCT2 can sense the leakage current and transmit the current to the leakage control circuit, and the leakage control of the ground wire is realized by the leakage control circuit; when leakage current exists between a zero line N and a live line L, a light emitting diode LED1 is lighted for indication, when an LED1 is lighted, a switch K1 is switched on, a zero sequence transformer ZCT1 can sense the leakage current in a lead and induces the leakage current to generate current, and a current signal is transmitted to an IC chip, wherein a capacitor C4, a resistor R12 and a resistor R13 form filtering current, the input current is processed, a stable current signal is output and supplied to the IC chip, a leakage breaker L1 is electrified when the leakage current exists, the current is transmitted to a rectifier DB1, the rectifier DB1 processes the current and transmits the processed current to a pin 8 of the IC chip, and meanwhile, the processed current is transmitted to a collector electrode of a triode Q1 and a base electrode of a triode Q2, so that a triode Q1 and a triode Q; the diode D4, the resistor R5 and the triode Q3 form a zero live wire leakage control circuit, and when the IC chip obtains a leakage current signal, the signal is sent to the zero live wire leakage control circuit to control zero live wire leakage; the whole can realize the control of the earth wire leakage and the leakage between the zero line N and the live line L.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. Referring to fig. 1, a leakage protection circuit based on triple break includes an IC chip, a zero sequence transformer ZCT1, a zero sequence transformer ZCT2, a rectifier DB1, a transistor Q1, a transistor Q2, and a thyristor Q3, wherein the model of the IC chip is VG54123B, the models of the transistor Q1 and the transistor Q2 are both S9013, and the model of the thyristor Q3 is JX012N 2; a ground wire E penetrates through the zero sequence transformer ZCT2, the input end of the ground wire E is connected to an E-IN terminal, and the output end of the ground wire E is connected to the output of an E-OUT terminal; the input end of a ground wire E is connected to the output ends of the resistor R23 and the resistor R24, the output ends of the resistor R23 and the resistor R24 are connected and then connected to the input end of the diode D1, the output end of the diode D1 is connected to the input end of the light emitting diode LED2, the output end of the light emitting diode LED2 is connected to the input end of the resistor R25 and then connected to the input end of the resistor R26, the output ends of the resistor R25 and the resistor R26 are connected and then connected to the input end of the resistor R27 and connected to the input end of the resistor R28, and the output ends of the resistor R27 and the resistor R28. Wherein: a live wire L and a zero line N penetrate through the zero-sequence transformer ZCT1, the input end of the zero line N is connected to a power input terminal N, and is connected to the output ends of a thermistor VR1, a resistor R15 and a resistor R18 and a pin 3 connected to a rectifier B1; the input end of a thermistor VR1 is connected to the input end of a live wire L, the input end of a resistor R15 is connected to the output end of a light-emitting diode LED1, the input end of a light-emitting diode LED1 is connected to the output end of a resistor R14, the input end of a resistor R14 is connected to the output end of a diode D2, and the input end of a diode D2 is connected to the input end of the live wire L; the input end of the resistor R18 is connected to the output end of the switch K1, and the output end of the switch K1 is connected in series with the resistor R17 and the resistor R16 in sequence, penetrates through the zero-sequence transformer ZCT1 and is connected to the input end of the live wire L. Wherein: a pin 4 of the rectifier DB1 is connected to a pin 3 of the IC chip and is connected to the input end of a resistor R9, and the output end of the resistor R9 is connected to the output end of a zero sequence transformer ZCT 2; a pin 2 of the rectifier DB1 is connected to the output end of the resistor R19, the input end of the resistor R19 is connected to the output end of the tripper L1, and the input end of the tripper L1 is connected to the input end of the live wire L; a pin 1 of the rectifier DB1 is connected to an input end of a resistor R6 and is connected to an input end of a resistor R1, a thyristor Q3, a thermistor VR2 and an input end of a switch K2, an output end of the resistor R1 is connected to a pin 8 of the IC chip after being sequentially connected with a resistor R2, a resistor R3 and a resistor R4 in series, an output end of the resistor R4 is connected to an output end of a capacitor C1 and an output end of a zener diode ZD2, and an input end of the capacitor C1 and the zener diode ZD2 are connected and then connected to a pin 3 of; pin 7 of the IC chip is connected to the input terminal of diode D4, the output terminal of diode D4 is connected to the output terminal of diode D3 and to the input terminal of resistor R5, the input terminal of diode D3 is connected to the input terminal of zener diode ZD1, and the output terminal of zener diode ZD1 is connected to the output terminal of resistor R3; the output end of the resistor R5 is connected to the input end of the capacitor C3, and is connected to the output end of the resistor R11 and the control electrode of the thyristor Q3, and the input end of the resistor R11 is connected to the output end of the diode D5; the output end of the resistor R6 is connected in series with the resistor R7, the resistor R8 and the resistor R22 in sequence and then is connected to the base of the triode Q2 and the collector of the triode A1; the input end of the diode D5 is connected to the collector of the diode Q2 and the output end of the resistor R8, the anode of the thyristor Q3 is connected to the pin 1 of the rectifier DB1, the output end of the capacitor C3, the thermistor VR2, the switch K2 and the cathode of the thyristor Q3 are connected and then connected to the pin 3 of the IC chip; an emitter of the triode Q2 and an emitter of the triode Q1 are connected to an output end of the resistor R9, an output end of the triode Q1 is connected in series with the resistor R21 and then connected to an input end of the capacitor C5 and connected to an input end of the resistor R10, an output end of the resistor R10 is connected to an input end of the resistor R9, an output end of the capacitor C5 is connected to an input end of the zero sequence transformer ZCT2, and an input end of the resistor R9 is connected to an output end of the zero sequence transformer ZCT 2; the input end of the zero sequence transformer ZCT1 is connected in series with a resistor R12 and then connected to a pin 2 of the IC chip and is connected to the input end of a capacitor C4, and the output end of the zero sequence transformer ZCT1 is connected in series with a resistor R13 and then connected to a pin 1 of the IC chip and is connected to the output end of a capacitor C4. According to the leakage protection circuit based on the triple break, an E-IN terminal, an input end of a live wire L and a power input terminal N are connected with three-phase line input, a diode D1 limits input voltage, the LED2 is prevented from being burnt out due to overvoltage, when the LED2 is on, an indicating circuit is electrified, the ground wire E penetrates through a zero sequence transformer ZCT2 and senses leakage current of the ground wire E, when the ground wire E has the leakage current, the zero sequence transformer ZCT2 can sense the leakage current and generate current by itself and transmit the current to a triode Q1 and a triode Q2 for conduction, the diode D5, a resistor R11 and a thyristor Q3 form a leakage control circuit, and the triode Q1 and the triode Q2 are conducted to transmit the rear current to the leakage control circuit so as to control the leakage of the ground wire; a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a light emitting diode LED1, a switch K1 and a diode D2 form a leakage test circuit, when leakage occurs, a resistor R15, a light emitting diode LED1, a resistor R14 and a diode D2 form an electric loop after being connected with a live wire L and a zero line N, when leakage current exists, the light emitting diode LED1 is powered on and emits light to indicate that leakage current exists, when the light emitting diode LED1 is not lighted, no leakage current is indicated, when leakage current exists, the switch K1 is connected, a wire contacted with the output end of the resistor R16 has leakage current, a zero sequence ZCT1 can sense the leakage current in the wire and can sense the current by itself to generate current and transmit a current signal to an IC chip, wherein a capacitor C4, a resistor R12 and a resistor R13 form a filter current, the filter current is processed to output a stable current signal to be supplied to the IC chip, when the leakage current transformer L1 is powered on, the current is transmitted to a rectifier DB1, the rectifier DB1 processes the current and then transmits the processed current to a pin 8 of an IC chip, and meanwhile, the processed current is transmitted to a collector of a triode Q1 and a base of a triode Q2, so that the triode Q1 and a triode Q2 are conducted; the diode D4, the resistor R5 and the triode Q3 form a zero live wire leakage control circuit, and when the IC chip obtains a leakage current signal, the signal is sent to the zero live wire leakage control circuit to control zero live wire leakage. In summary, the following steps: according to the leakage protection circuit based on the three-pole interruption, when leakage current exists in the ground wire E, the zero sequence transformer ZCT2 can sense the leakage current and transmit the current to the leakage control circuit, and the leakage control of the ground wire is realized by the leakage control circuit; when leakage current exists between a zero line N and a live line L, a light emitting diode LED1 is lighted for indication, when an LED1 is lighted, a switch K1 is switched on, a zero sequence transformer ZCT1 can sense the leakage current in a lead and induces the leakage current to generate current, and a current signal is transmitted to an IC chip, wherein a capacitor C4, a resistor R12 and a resistor R13 form filtering current, the input current is processed, a stable current signal is output and supplied to the IC chip, a leakage breaker L1 is electrified when the leakage current exists, the current is transmitted to a rectifier DB1, the rectifier DB1 processes the current and transmits the processed current to a pin 8 of the IC chip, and meanwhile, the processed current is transmitted to a collector electrode of a triode Q1 and a base electrode of a triode Q2, so that a triode Q1 and a triode Q; the diode D4, the resistor R5 and the triode Q3 form a zero live wire leakage control circuit, and when the IC chip obtains a leakage current signal, the signal is sent to the zero live wire leakage control circuit to control zero live wire leakage; the whole can realize the control of the earth wire leakage and the leakage between the zero line N and the live line L. The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.
Claims (4)
1. A leakage protection circuit based on triple break comprises an IC chip, a zero sequence transformer ZCT1, a zero sequence transformer ZCT2, a rectifier DB1, a triode Q1, a triode Q2 and a thyristor Q3; the method is characterized in that: a ground wire E penetrates through the zero sequence transformer ZCT2, the input end of the ground wire E is connected to an E-IN terminal, and the output end of the ground wire E is connected to the output of an E-OUT terminal; the input end of the ground wire E is connected to the output ends of the resistor R23 and the resistor R24, the output ends of the resistor R23 and the resistor R24 are connected and then connected to the input end of the diode D1, the output end of the diode D1 is connected to the input end of the light emitting diode LED2, the output end of the light emitting diode LED2 is connected to the input end of the resistor R25 and then connected to the input end of the resistor R26, the output ends of the resistor R25 and the resistor R26 are connected and then connected to the input end of the resistor R27 and then connected to the input end of the resistor R28, and the output ends of the resistor R27 and the resistor R28; a live wire L and a zero wire N penetrate through the zero-sequence transformer ZCT1, the input end of the zero wire N is connected to a power input terminal N, and is connected to the output ends of a thermistor VR1, a resistor R15 and a resistor R18 and a pin 3 connected to a rectifier B1; the input end of the thermistor VR1 is connected to the input end of the live wire L, the input end of the resistor R15 is connected to the output end of the light-emitting diode LED1, the input end of the light-emitting diode LED1 is connected to the output end of the resistor R14, the input end of the resistor R14 is connected to the output end of the diode D2, and the input end of the diode D2 is connected to the input end of the live wire L; the input end of the resistor R18 is connected to the output end of the switch K1, and the output end of the switch K1 is sequentially connected in series with the resistor R17 and the resistor R16, then penetrates through the zero-sequence transformer ZCT1, and then is connected to the input end of the live wire L; a pin 4 of the rectifier DB1 is connected to a pin 3 of the IC chip and is connected to the input end of a resistor R9, and the output end of the resistor R9 is connected to the output end of a zero sequence transformer ZCT 2; a pin 2 of the rectifier DB1 is connected to the output end of the resistor R19, the input end of the resistor R19 is connected to the output end of the tripper L1, and the input end of the tripper L1 is connected to the input end of the live wire L; a pin 1 of the rectifier DB1 is connected to an input end of a resistor R6 and is connected to input ends of a resistor R1, a thyristor Q3, a thermistor VR2 and a switch K2, an output end of the resistor R1 is connected to a pin 8 of the IC chip after being sequentially connected with a resistor R2, a resistor R3 and a resistor R4 in series, an output end of the resistor R4 is connected to an output end of a capacitor C1 and an output end of a zener diode ZD2, and an input end of the capacitor C1 and the zener diode ZD2 are connected and then connected to a pin 3 of the IC chip; a pin 7 of the IC chip is connected to the input end of a diode D4, the output end of a diode D4 is connected to the output end of a diode D3 and is connected to the input end of a resistor R5, the input end of the diode D3 is connected to the input end of a zener diode ZD1, and the output end of the zener diode ZD1 is connected to the output end of a resistor R3; the output end of the resistor R5 is connected to the input end of the capacitor C3, and is connected to the output end of the resistor R11 and the control electrode of the thyristor Q3, and the input end of the resistor R11 is connected to the output end of the diode D5; the output end of the resistor R6 is connected in series with a resistor R7, a resistor R8 and a resistor R22 in sequence and then is connected to the base of the triode Q2 and the collector of the triode A1; the input end of the diode D5 is connected to the collector of the diode Q2 and the output end of the resistor R8, the anode of the thyristor Q3 is connected to the pin 1 of the rectifier DB1, the output end of the capacitor C3, the thermistor VR2, the switch K2 and the cathode of the thyristor Q3 are connected and then connected to the pin 3 of the IC chip; an emitter of the triode Q2 and an emitter of the triode Q1 are both connected to an output end of the resistor R9, an output end of the triode Q1 is connected in series with the resistor R21 and then connected to an input end of the capacitor C5 and connected to an input end of the resistor R10, an output end of the resistor R10 is connected to an input end of the resistor R9, an output end of the capacitor C5 is connected to an input end of the zero sequence transformer ZCT2, and an input end of the resistor R9 is connected to an output end of the zero sequence transformer ZCT 2; the input end of the zero sequence transformer ZCT1 is connected in series with a resistor R12 and then connected to a pin 2 of the IC chip and is connected to the input end of a capacitor C4, and the output end of the zero sequence transformer ZCT1 is connected in series with a resistor R13 and then connected to a pin 1 of the IC chip and is connected to the output end of a capacitor C4.
2. The leakage protection circuit based on triple disconnection of claim 1, wherein: the model of the IC chip is VG 54123B.
3. The leakage protection circuit based on triple disconnection of claim 1, wherein: the model numbers of the triode Q1 and the triode Q2 are both S9013.
4. The leakage protection circuit based on triple disconnection of claim 1, wherein: the model of the thyristor Q3 is JX012N 2.
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| CN201922205562.0U CN211239315U (en) | 2019-12-11 | 2019-12-11 | Leakage protection circuit based on three-pole disconnection |
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| CN201922205562.0U CN211239315U (en) | 2019-12-11 | 2019-12-11 | Leakage protection circuit based on three-pole disconnection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436483A (en) * | 2020-11-06 | 2021-03-02 | 江西百盈高新技术股份有限公司 | Leakage protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112436483A (en) * | 2020-11-06 | 2021-03-02 | 江西百盈高新技术股份有限公司 | Leakage protection circuit |
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