CN110797718A - Earth leakage protection plug with ground wire intelligence break-make and ground wire live detection - Google Patents
Earth leakage protection plug with ground wire intelligence break-make and ground wire live detection Download PDFInfo
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- CN110797718A CN110797718A CN201911201408.4A CN201911201408A CN110797718A CN 110797718 A CN110797718 A CN 110797718A CN 201911201408 A CN201911201408 A CN 201911201408A CN 110797718 A CN110797718 A CN 110797718A
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 238000001914 filtration Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 206010014357 Electric shock Diseases 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
- H01R13/7135—Structural association with built-in electrical component with built-in switch the switch being a safety switch with ground fault protector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/717—Structural association with built-in electrical component with built-in light source
- H01R13/7175—Light emitting diodes (LEDs)
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a leakage protection plug with intelligent ground wire on-off and live detection, which comprises a live wire, a zero line, a ground wire grounding detection circuit, a full-wave rectification circuit, a voltage division circuit, a ground wire live detection circuit, a ground wire relay circuit and a relay K3, wherein the ground wire live detection circuit comprises an optical coupler U2, the ground wire grounding detection circuit comprises an optical coupler U1, the input end of the ground wire relay circuit is electrically connected with the full-wave rectification circuit, the control end of the ground wire relay circuit is electrically connected with the voltage division circuit, the coil input end of the relay K3 is connected with the output end of the ground wire relay circuit, the coil output end of the relay K3 is grounded, the contact output end and the input end of the relay K3 are respectively connected with the two ends of the ground wire, the plug has the functions of detecting whether the ground wire is normally, the occurrence of electric shock accidents caused by the charged shell is avoided.
Description
Technical Field
The invention relates to the field of plugs, in particular to a leakage protection plug with intelligent on-off of a ground wire and live detection of the ground wire.
Background
The existing sockets in rural areas and mountainous areas are not provided with ground wires generally, the ground wires in the sockets can be incapable of being normally used due to reasons such as misconnection, poor grounding, disconnection and socket aging, the shells of electrical equipment are electrified, electric shock accidents are caused, and in order to prevent the occurrence of the event, a plug capable of judging whether the ground wires can be normally used and intelligently controlling the on-off of electrical equipment is needed.
Disclosure of Invention
In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide an earth leakage protection plug with intelligent on/off of a ground wire and live detection of the ground wire, so as to solve the problems of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an electric leakage protection plug with intelligent ground wire on-off and live ground wire detection comprises a live wire, a zero line, a ground wire, an electric leakage protection circuit, a ground wire grounding detection circuit, a full-wave rectification circuit, a voltage division circuit, a ground wire live detection circuit, a ground wire relay circuit and a relay K3, wherein the electric leakage protection circuit is electrically connected with the output end of the full-wave rectification circuit, the ground wire live detection circuit comprises an optical coupler U2, the ground wire grounding detection circuit comprises an optical coupler U1, the anode of a light emitter of the optical coupler U1 is electrically connected with the live wire, the cathode of a light emitter of the optical coupler U1 is electrically connected with the ground wire, the anode of a light receiver of the optical coupler U1 is electrically connected with the output end of the full-wave rectification circuit, the cathode of a light receiver of the optical coupler U1 is respectively electrically connected with the anode of the light receiver of the optical coupler U2 and the voltage division circuit, the negative electrode of a light emitter of the optocoupler U2 is electrically connected with a zero line, the input end of a ground wire relay circuit is electrically connected with a full-wave rectification circuit, the control end of the ground wire relay circuit is electrically connected with a voltage division circuit, the coil input end of a relay K3 is connected with the output end of the ground wire relay circuit, the coil output end of the relay K3 is grounded, and the contact output end and the contact input end of the relay K3 are respectively connected with the two ends of a ground wire.
Preferably, the voltage dividing circuit includes a resistor R19 and a resistor R20, the resistor R19 is connected in series with the resistor R20, the anode of the resistor R19 is electrically connected to the cathode of the light receiver of the optocoupler U1 and the anode of the light receiver of the optocoupler U2, the cathode of the resistor R20 is grounded, and the voltage dividing circuit performs a voltage dividing function.
Preferably, the ground relay circuit comprises a triode Q2, the B pole of the triode Q2 is electrically connected with the positive pole of the resistor R20, the C pole of the triode Q2 is electrically connected with the output end of the full-wave rectification circuit, the E pole of the triode Q2 is electrically connected with the coil input end of the relay K3, and the ground relay circuit can control whether the electrical appliance shell is connected with the ground wire, so that the function of preventing electric shock is achieved.
Preferably, the full-wave rectification circuit comprises a rectifier bridge stack, and the rectifier bridge stack can convert alternating current into direct current for plugs and electrical appliances.
Preferably, the output end of the rectifier bridge stack is electrically connected with the input end of the filtering voltage-reducing and voltage-stabilizing circuit, and the output end of the filtering voltage-reducing and voltage-stabilizing circuit is electrically connected with the ground wire grounding detection circuit and the ground wire relay circuit respectively.
Preferably, the filtering voltage-reducing and voltage-stabilizing circuit comprises a voltage-stabilizing tube DW2, a capacitor C11 and a resistor R15, wherein the voltage-stabilizing tube DW2 is connected with the capacitor C11 in series, the voltage-stabilizing tube DW2 is connected with the resistor R15 in parallel, and the filtering voltage-reducing and voltage-stabilizing circuit plays a role in filtering, reducing voltage and stabilizing voltage, so that a circuit in the plug is protected, and the service life of the plug is prolonged.
Preferably, the ground wire grounding detection circuit further comprises a resistor R17, a diode D4, a resistor R18 and/or a capacitor C12, the resistor R17 is connected in series with a light emitter of the optocoupler U1, the resistor R18 is connected in series with the capacitor C12, and the diode D4 is connected in parallel with a light emitter of the optocoupler U1.
Preferably, the coil of the relay K3 is connected in parallel with the light emitting diode LED2, and the light emitting diode LED2 is not lighted when the ground is connected, so that a user can conveniently know whether the electric appliance casing is connected with the ground.
Preferably, the C pole of the transistor Q2 is electrically connected to the positive pole of the light emitting diode LED2, the light emitting diode LED2 is connected to the earth leakage protection circuit, the earth leakage protection circuit includes a silicon controlled SCR, a relay driving circuit and a switching circuit, the G pole of the silicon controlled SCR is electrically connected to the negative pole of the light emitting diode LED2, the K pole of the silicon controlled SCR is grounded, the a pole of the silicon controlled SCR is electrically connected to the relay driving circuit, the relay driving circuit is electrically connected to the switching circuit, the conduction of the silicon controlled SCR disconnects the relay driving circuit, the disconnection of the relay driving circuit disconnects the switching circuit, the switching circuit includes a relay K1 and a relay K2, the coil of the relay K1 is connected in series with the coil of the relay K2, the contact output terminal and the contact input terminal of the relay K1 are respectively connected to both ends of the live wire, the contact output terminal and the contact input terminal of the relay K2 are respectively connected, the coil input end of the relay K1 is electrically connected with the output end of the full-wave rectifying circuit, the relay driving circuit comprises a triode Q1, a resistor R9 and a resistor R8, the resistor R9 is connected with the resistor R8 in series, the E pole of the triode Q1 is electrically connected with the output end of the full-wave rectifying circuit, the C pole of the triode Q1 is electrically connected with the coil output end of the relay K2, and the B pole of the triode Q1 is electrically connected with the resistor R8.
Compared with the prior art, the invention has the advantages that:
the plug has the functions of detecting whether the ground wire is normally used or not and detecting whether the ground wire is electrified or not, and automatically judging whether the ground wire is connected with the shell of an electric appliance or not according to the detected state of the ground wire, so that the occurrence of electric shock accidents caused by the electrification of the shell is avoided, the safety of people is ensured, the electric appliance can be simultaneously disconnected with a live wire and a zero line, and the safety performance of the electric appliance is further improved.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of the circuit of FIG. 1 according to the present invention;
FIG. 3 is a schematic circuit diagram of the present invention;
FIG. 4 is a schematic diagram of the circuit of FIG. 3 according to the present invention;
FIG. 5 is a schematic diagram of a ground line ground detection circuit according to the present invention;
FIG. 6 is a schematic diagram of a ground line ground detection circuit according to the present invention;
FIG. 7 is a schematic diagram of a ground line ground detection circuit according to the present invention;
FIG. 8 is a circuit schematic of the present invention;
fig. 9 is a schematic diagram of the circuit of fig. 8 in accordance with the present invention.
Detailed Description
The first embodiment is as follows: as shown in fig. 1-7, the device comprises a live wire, a zero line, a ground wire grounding detection circuit, a full-wave rectification circuit, a voltage division circuit, a ground wire live detection circuit, a ground wire relay circuit and a relay K3, wherein the ground wire live detection circuit comprises an optical coupler U2, the ground wire grounding detection circuit comprises an optical coupler U1, the positive electrode of a light emitter of the optical coupler U1 is electrically connected with the live wire, the negative electrode of a light emitter of the optical coupler U1 is electrically connected with the ground wire, the positive electrode of a light receiver of the optical coupler U1 is electrically connected with the output end of the full-wave rectification circuit, the negative electrode of the light receiver of the optical coupler U1 is respectively electrically connected with the positive electrode of the light receiver of the optical coupler U2 and the voltage division circuit, the negative electrode of the light receiver of the optical coupler U2 is grounded, the positive electrode of the light emitter of the optical coupler U2 is electrically connected with the ground wire, the coil input end of the relay K3 is connected with the output end of the ground relay circuit, the coil output end of the relay K3 is grounded, and the contact output end and the contact input end of the relay K3 are respectively connected with the two ends of the ground wire.
When the electric appliance operates, the input ends of the ground wire, the live wire and the zero wire are respectively connected with the ground wire, the live wire and the zero wire in the socket, the output ends of the ground wire, the live wire and the zero wire are respectively connected with the shell, the live wire and the zero wire of the electric appliance, current flows into the ground wire grounding detection circuit and the full-wave rectification circuit from the live wire, when the ground wire can be normally used and the ground wire is not electrified, a part of current directly flows out from the ground wire in the socket, at the moment, a light emitter of the optical coupler U1 is electrified and lightened, the current flows into the filtering voltage reduction voltage stabilizing circuit from the full-wave rectification circuit and then flows into a light receiver of the optical coupler U1 and a ground wire relay circuit respectively by the filtering voltage reduction voltage stabilizing circuit, at the moment, the ground wire is not electrified, the light emitter of the optical coupler U2 is not electrified, the light receiver of the optical coupler U2 is not electrified, because the light receiver of, the C pole and the E pole of the triode Q2 are conducted, the coil end of the relay K3 is electrified, the contact end of the relay K3 is closed, the ground wire is conducted, the shell of the electric appliance is communicated with the ground wire in the socket, the current does not pass through the light-emitting diode LED2, and the light-emitting diode LED2 is not bright;
if the ground wire in the socket can be normally used but is electrified, a part of current directly flows out from the ground wire in the socket, at the moment, a light emitter of the optocoupler U1 is electrified and lightened, the current flows into the filtering voltage reduction and voltage stabilization circuit from the full-wave rectification circuit, and then flows into a light receiver of the optocoupler U1 and a ground wire relay circuit respectively from the filtering voltage reduction and voltage stabilization circuit, because the ground wire in the socket is electrified, the light emitter of the optocoupler U2 is conducted and lightened, the light receiver of the optocoupler U2 is conducted after receiving a light signal, because the light receiver of the optocoupler U2 is electrified, the light receiver of the optocoupler U2 is at a high level, the resistor R20 is at a low level, the B pole of the triode Q2 is at a low level, the C pole and the E pole of the triode Q2 are not conducted, the coil end of the relay K3 is not electrified, the contact end of the relay K3 is separated, the ground wire is, the light emitting diode LED2 emits light, thereby preventing the risk of electric shock;
if the ground wire in the socket can not be normal, the current can not flow out from the ground wire in the socket, at the moment, the illuminator of the optocoupler U1 is not electrified and is not bright, the current can not flow into the light receiver of the optocoupler U1, the light receiver of the optocoupler U1 is at a low level, the resistor R20 is at a low level, the B pole of the triode Q2 is at a low level, the C pole and the E pole of the triode Q2 are not conducted, the coil end of the relay K3 is not electrified, the contact end of the relay K3 is separated, the ground wire is disconnected, the shell of the electrical appliance is separated from the ground wire in the socket, the current passes through the light emitting diode LED2, and the light emitting diode LED2 emits light, so that the risk of electric.
Example two: as shown in fig. 8-9, the difference from the first embodiment is that when the ground fault detection circuit detects that the ground wire can be used normally and the ground wire is not charged, the light emitting diode LED2 is not powered, the G pole of the silicon controlled rectifier SCR is at a low level, the K pole and the a pole of the silicon controlled rectifier SCR are not powered, the B pole of the triode Q1 is at a high level, the C pole and the E pole of the triode Q1 are connected, the coils of the relay K1 and the relay K2 are powered, the contacts on the relay K1 and the relay K2 are closed, the live wire and the zero wire are both connected, the electric appliance is powered to start operation, when the ground fault detection circuit detects that the ground wire cannot be used normally and/or the ground wire is charged, the light emitting diode LED2 is powered and lighted, the G pole of the silicon controlled rectifier is at a high level, the K pole and the a pole of the silicon controlled rectifier are connected, the current flows between the K pole and the a, the B pole of the triode Q1 is at low level, the C pole and the E pole of the triode Q1 are not conducted, the coils of the relay K1 and the relay K2 are not electrified, the contacts on the relay K1 and the relay K2 are separated, the live wire and the zero wire are both disconnected, the electric appliance is powered off, the safety performance of the electric appliance is further improved, and the electric shock is thoroughly prevented.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An electric leakage protection plug with intelligent ground wire on-off and live ground wire detection is characterized by comprising a live wire, a zero line, a ground wire, an electric leakage protection circuit, a ground wire grounding detection circuit, a full-wave rectification circuit, a voltage division circuit, a ground wire live detection circuit, a ground wire relay circuit and a relay K3, wherein the electric leakage protection circuit is electrically connected with the output end of the full-wave rectification circuit, the ground wire live detection circuit comprises an optical coupler U2, the ground wire grounding detection circuit comprises an optical coupler U1, the anode of a light emitter of the optical coupler U1 is electrically connected with the live wire, the cathode of a light emitter of the optical coupler U1 is electrically connected with the ground wire, the anode of a light receiver of the optical coupler U1 is electrically connected with the output end of the full-wave rectification circuit, the cathode of the light receiver of the optical coupler U1 is respectively electrically connected with the anode of the light receiver of the optical coupler U2 and the voltage division circuit, the, the negative electrode of a light emitter of the optocoupler U2 is electrically connected with a zero line, the input end of a ground wire relay circuit is electrically connected with a full-wave rectification circuit, the control end of the ground wire relay circuit is electrically connected with a voltage division circuit, the coil input end of a relay K3 is connected with the output end of the ground wire relay circuit, the coil output end of the relay K3 is grounded, and the contact output end and the contact input end of the relay K3 are respectively connected with the two ends of a ground wire.
2. A leakage protection plug with intelligent ground wire on-off and live ground wire detection as claimed in claim 1, wherein said voltage divider circuit comprises a resistor R19 and a resistor R20, the resistor R19 is connected in series with the resistor R20, the positive pole of the resistor R19 is electrically connected to the negative pole of the light receiver of the optocoupler U1 and the positive pole of the light receiver of the optocoupler U2, respectively, and the negative pole of the resistor R20 is grounded.
3. A residual current protection plug with intelligent ground connection and live ground connection detection as claimed in claim 2, wherein said ground relay circuit comprises a transistor Q2, the B pole of the transistor Q2 is electrically connected to the positive pole of the resistor R20, the C pole of the transistor Q2 is electrically connected to the output terminal of the full-wave rectification circuit, and the E pole of the transistor Q2 is electrically connected to the coil input terminal of the relay K3.
4. A residual current protection plug with intelligent earth wire on-off and live earth wire detection according to claim 3, wherein said full wave rectification circuit comprises a bridge rectifier.
5. The earth leakage protection plug with intelligent ground wire on-off and live ground wire detection as claimed in claim 4, wherein the output terminal of said bridge rectifier is electrically connected to the input terminal of the filter voltage-reducing and voltage-stabilizing circuit, and the output terminal of the filter voltage-reducing and voltage-stabilizing circuit is electrically connected to the ground wire grounding detection circuit and the ground wire relay circuit, respectively.
6. The leakage protection plug with intelligent ground wire on-off and live ground wire detection of claim 5, wherein the filtering voltage-reducing voltage-stabilizing circuit comprises a voltage-regulator tube DW2, a capacitor C11 and a resistor R15, the voltage-regulator tube DW2 is connected with the capacitor C11 in series, and the voltage-regulator tube DW2 is connected with the resistor R15 in parallel.
7. The earth leakage protection plug with intelligent ground connection and live ground connection detection as claimed in claim 6, wherein the ground connection detection circuit further comprises a resistor R17, a diode D4, a resistor R18 and/or a capacitor C12, the resistor R17, the light emitter of the optocoupler U1, the resistor R18 and/or the capacitor C12 are connected in series, and the diode D4 is connected in parallel with the light emitter of the optocoupler U1.
8. A residual current protection plug with intelligent ground connection and live ground connection detection according to claim 7, characterized in that the coil of the relay K3 is connected in parallel with the LED 2.
9. An earth leakage protection plug with intelligent ground connection and live ground connection detection as claimed in claim 7, wherein the C pole of said transistor Q2 is electrically connected to the positive pole of LED2, the LED2 is electrically connected to the earth leakage protection circuit, the earth leakage protection circuit comprises a SCR whose G pole is electrically connected to the negative pole of LED2, a relay driver circuit electrically connected to the K pole of SCR, and a switch circuit electrically connected to the A pole of SCR and the relay driver circuit, the relay driver circuit is electrically connected to the switch circuit, the SCR is turned on to turn off the relay driver circuit, the relay driver circuit is turned off to turn off the switch circuit, the switch circuit comprises relay K1 and relay K2, the coil of relay K1 is connected in series with the coil of relay K2, the contact output end and the input end of the relay K1 are respectively connected to two ends of a live wire, the contact output end and the input end of the relay K2 are respectively connected to two ends of a zero wire, the coil input end of the relay K1 is electrically connected with the output end of a full-wave rectification circuit, the relay driving circuit comprises a triode Q1, a resistor R9 and a resistor R8, the resistor R9 is connected with the resistor R8 in series, the E pole of the triode Q1 is electrically connected with the output end of the full-wave rectification circuit, the C pole of the triode Q1 is electrically connected with the coil output end of the relay K2, and the B pole of the triode Q1 is electrically connected with the resistor R8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201408.4A CN110797718A (en) | 2019-11-29 | 2019-11-29 | Earth leakage protection plug with ground wire intelligence break-make and ground wire live detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201408.4A CN110797718A (en) | 2019-11-29 | 2019-11-29 | Earth leakage protection plug with ground wire intelligence break-make and ground wire live detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110797718A true CN110797718A (en) | 2020-02-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911201408.4A Withdrawn CN110797718A (en) | 2019-11-29 | 2019-11-29 | Earth leakage protection plug with ground wire intelligence break-make and ground wire live detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110797718A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN112235191A (en) * | 2020-10-15 | 2021-01-15 | 卓信通信股份有限公司 | Multifunctional intelligent lamp pole gateway |
| CN113466745A (en) * | 2020-03-31 | 2021-10-01 | 华为技术有限公司 | Transmission apparatus and data transmission method |
-
2019
- 2019-11-29 CN CN201911201408.4A patent/CN110797718A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466745A (en) * | 2020-03-31 | 2021-10-01 | 华为技术有限公司 | Transmission apparatus and data transmission method |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN111722101B (en) * | 2020-05-29 | 2023-09-01 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN112235191A (en) * | 2020-10-15 | 2021-01-15 | 卓信通信股份有限公司 | Multifunctional intelligent lamp pole gateway |
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Application publication date: 20200214 |
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| WW01 | Invention patent application withdrawn after publication |