CN113363935A - Leakage protector - Google Patents

Leakage protector Download PDF

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Publication number
CN113363935A
CN113363935A CN202110688250.9A CN202110688250A CN113363935A CN 113363935 A CN113363935 A CN 113363935A CN 202110688250 A CN202110688250 A CN 202110688250A CN 113363935 A CN113363935 A CN 113363935A
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China
Prior art keywords
module
leakage
protection circuit
earth
load
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Granted
Application number
CN202110688250.9A
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Chinese (zh)
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CN113363935B (en
Inventor
方一栋
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Cixi Yidong Electronic Co ltd
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Cixi Yidong Electronic Co ltd
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Priority to CN202110688250.9A priority Critical patent/CN113363935B/en
Publication of CN113363935A publication Critical patent/CN113363935A/en
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Publication of CN113363935B publication Critical patent/CN113363935B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
    • H04M1/72415—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories for remote control of appliances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The invention discloses a leakage protector, comprising: the leakage protection circuit is used for collecting leakage current on a line between the commercial power and the load, comparing the collected leakage current with a preset threshold value, and disconnecting the line between the commercial power and the load if the leakage current is greater than the preset threshold value; and the wireless control module is in wireless connection with the terminal and is used for triggering signals according to the execution command of the terminal and transmitting corresponding signals to the leakage protection circuit to select the preset threshold value. Compared with the prior art, the wireless control module according to the embodiment of the invention realizes the remote control of the terminal on the leakage protection circuit, the preset threshold of the leakage protection circuit can be selected under the instruction of the terminal, the change of the preset threshold of the leakage protection circuit can be used for protecting different actual leakage currents according to the requirement, and the application range is greatly expanded.

Description

Leakage protector
Technical Field
The present invention relates to leakage protection, and more particularly to a leakage protector that can be manually controlled on the spot and can be remotely monitored and controlled.
Background
When electric leakage occurs in the circuit and the leakage current reaches a preset threshold value of the leakage protector, the leakage protector can cut off the circuit in time, so that a loaded device in the circuit is protected; the leakage protector is widely applied as a line protection device, the existing leakage protector is manually controlled and troublesome to use, a preset threshold value is determined by a peripheral hardware circuit, the leakage protector cannot be changed after being manufactured, the leakage protector can only be set at a certain value according to requirements, and the application range is greatly reduced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a leakage protector which can change a preset threshold value of the leakage protector through remote control and has a wide application range.
To achieve the above object, an embodiment of the present invention provides a leakage protector, including:
the leakage protection circuit is used for collecting leakage current on a line between the commercial power and the load, comparing the collected leakage current with a preset threshold value, and disconnecting the line between the commercial power and the load if the leakage current is greater than the preset threshold value;
and the wireless control module is in wireless connection with the terminal and is used for triggering signals according to the execution command of the terminal and transmitting corresponding signals to the leakage protection circuit to select the preset threshold value.
In one or more embodiments of the present invention, the leakage protection circuit includes a leakage current selection module, configured to output a corresponding preset threshold value under a corresponding signal triggered by the wireless control module.
In one or more embodiments of the present invention, the leakage protection circuit includes a collection module, configured to collect a leakage current on a line between a commercial power and a load.
In one or more embodiments of the present invention, the leakage protection circuit includes a first driving module and an execution module, the first driving module is configured to drive the execution module to disconnect a line between a commercial power and a load, and the execution module is configured to control disconnection and conduction of the line between the commercial power and the load.
In one or more embodiments of the present invention, the leakage protector further includes a second driving module, where the second driving module is configured to drive the execution module to conduct a line between the utility power and the load under the control of the wireless control module.
In one or more embodiments of the present invention, the leakage protection circuit further includes a chip module.
In one or more embodiments of the present invention, the earth leakage protector further comprises a testing module for forming an earth leakage current on a line between the utility power and the load manually or under the control of the wireless control module.
In one or more embodiments of the present invention, the earth leakage protector further includes a detection module, configured to detect whether a line between a utility power and a load is powered on, so as to determine an operating state of the earth leakage protection circuit, and feed back the operating state to the terminal through the wireless control module.
In one or more embodiments of the present invention, the earth leakage protector further includes a power supply processing module for supplying power.
In one or more embodiments of the present invention, the earth leakage protector further comprises a key module, and the key module is used for pairing the wireless control module and the terminal.
Compared with the prior art, the wireless control module according to the embodiment of the invention realizes the remote control of the terminal on the leakage protection circuit, the preset threshold of the leakage protection circuit can be selected under the instruction of the terminal, the change of the preset threshold of the leakage protection circuit can be used for protecting different actual leakage currents according to the requirement, and the application range is greatly expanded.
Drawings
Fig. 1 is a system block diagram of a leakage protector according to an embodiment of the present invention;
FIG. 2 is a circuit schematic of a wireless control module according to one embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a leakage protection circuit according to an embodiment of the invention;
FIG. 4 is a circuit schematic of a second driver module according to an embodiment of the invention;
FIG. 5 is a circuit schematic of a test module according to an embodiment of the present invention;
FIG. 6 is a circuit schematic of a detection module according to an embodiment of the invention;
FIG. 7 is a circuit schematic of a key module according to an embodiment of the invention;
FIG. 8 is a circuit schematic of a power processing module according to an embodiment of the invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1, a leakage protector according to a preferred embodiment of the present invention includes a wireless control module 100 and a leakage protection circuit 200, wherein the wireless control module 100 is wirelessly connected to a terminal 800. The leakage protection circuit 200 is configured to collect a leakage current on a line between the utility power and the load, compare the collected leakage current with a preset threshold, and disconnect the line between the utility power and the load if the leakage current is greater than the preset threshold. The wireless control module 100 is configured to trigger a signal for the execution command of the terminal 800, and transmit a corresponding signal to the earth leakage protection circuit 200 for selecting the preset threshold.
The terminal 800 in this embodiment is exemplified by a mobile phone APP.
The leakage protection circuit 200 includes a chip module 210, a leakage current selection module 220, a first driving module 230, a collection module 240, and an execution module 250.
The earth leakage protector further comprises a second driving module 300, a testing module 400, a detecting module 500, a key module 600 and a power processing module 700.
Specifically, the acquisition module 240, the leakage current selection module 120, and the first driving module 230 are all connected to the chip module 210, the execution module 250 is connected to the first driving module 230, and the leakage current selection module 220, the second driving module 300, the testing module 400, the detection module 500, and the key module 600 are all connected to the wireless control module 100.
The second driving module 300 mechanically controls the execution module 250 to act, and the power processing module 700 is configured to process the commercial power and supply power to the chip module 210, the first driving module 230, the wireless control module 100, the second driving module 300, the detection module 500, and the key module 600.
In this embodiment, the collecting module 240 is configured to collect leakage current on a line between the utility power and the load; the leakage current selection module 220 is configured to output a corresponding preset threshold value under a corresponding signal triggered by the wireless control module 100; the first driving module 230 is used for driving the executing module 250 to disconnect a line between the commercial power and the load; the execution module 250 is used for controlling the disconnection and the conduction of a line between the commercial power and the load; the second driving module 300 is configured to drive the execution module 250 to conduct a line between the utility power and the load under the control of the wireless control module 100; the test module 400 is used to form a leakage current on a line between a mains supply and a load manually or under the control of the wireless control module 100; the detection module 500 is configured to detect whether a line between the utility power and the load is powered on, so as to determine a working state of the leakage protection circuit 200, and feed the working state back to the mobile phone APP through the wireless control module 100; the key module 600 is used for pairing the wireless control module 100 and the mobile phone APP.
Therefore, the wireless control module 100 has functions of controlling the second driving module 300 to operate the executing module 250, controlling the testing module 400 to perform the test of the analog leakage current, and receiving the operating state of the leakage protection circuit 200 transmitted by the detecting module 500, in addition to the selection of the preset threshold value by the leakage current selecting module 120. After the wireless control module 100 and the mobile phone APP are successfully paired, the mobile phone APP can issue an instruction to the wireless control module 100 and receive a signal transmitted by the wireless control module 100.
As shown in fig. 2, the model of wireless control module 100 is TYWE2S, and be connected with electric capacity C9 between wireless control module 100's foot 1 and the foot 3, direct voltage 3.3V is connected to wireless control module 100's foot 1, and wireless control module 100's foot 3 ground connection can realize remote monitoring and control earth leakage protector through the corresponding cell-phone APP that pairs with wireless control module 100.
As shown in fig. 3, the chip module 210 has a model RV4145, and a capacitor C5 is connected between the pins 3 and 4 of the chip module 210.
As shown in fig. 3, the leakage current selection module 220 is a feedback circuit connected to pin 7 and pin 1 of the chip module 210, and is composed of 3 circuits controlled by the wireless control module 100, and the preset thresholds are 5MA, 10MA and 30MA respectively, which are not limited to only three circuits and only three kinds of preset thresholds.
The circuit corresponding to the preset threshold value of 5MA is controlled by a pin 5 of the wireless control module 100, the pin 5 of the wireless control module 100 is connected with a resistor R12 in series and then connected with the base of a triode Q3, the collector of the triode Q3 is connected with a capacitor C8 in series, the capacitor C8 is connected with a pin 7 of the chip module 210, a capacitor C8 is connected with a resistor R9 in parallel, and the transmitter of the triode Q3 is connected with a pin 1 of the chip module 210.
The circuit with the preset threshold value of 10MA is controlled by a pin 7 of the wireless control module 100, the pin 7 of the wireless control module 100 is connected in series with a resistor R11 and then connected with a base electrode of a triode Q2, an emitting electrode of the triode Q2 is connected in series with a capacitor C7, the capacitor C7 is connected with the pin 7 of the chip module 210, a capacitor C7 is connected in parallel with a resistor R8, and the emitting electrode of the triode Q2 is connected with a pin 1 of the chip module 210.
The preset threshold value is 30MA and is correspondingly controlled by a pin 9 of the wireless control module 100, the pin 9 of the wireless control module 100 is connected with a resistor R10 in series and then is connected with a base electrode of a triode Q1, a collector electrode of the triode Q1 is connected with a capacitor C6 in series, the capacitor C6 is connected with a pin 7 of the chip module 210, a capacitor C6 is connected with a resistor R7 in parallel, and an emitter electrode of the triode Q1 is connected with a pin 1 of the chip module 210.
According to the three groups of leakage current control circuits, the default preset threshold value is 30MA, so that after power-on, when the preset threshold value is not modified through the mobile phone APP, the 30MA feedback group is normally on, and when the preset threshold value is modified remotely through the mobile phone APP, which path is conducted is determined according to the modified parameters.
In other embodiments, the wireless control module 100 may control the selection of the preset threshold not only through the transistor, but also through the MOS transistor or other chips, and certainly, may also directly control the selection of the preset threshold through the chip module 210.
As shown in fig. 3, the first driving module 230 includes a thyristor Q4 having a control electrode connected to the pin 5 of the chip module 210, the cathode of the thyristor Q4 is grounded, a capacitor E5 and a resistor R13 are connected in parallel between the pin 5 of the chip module 210 and the ground, the output stage of the thyristor Q4 is connected in series with a resistor R14 and then connected to the dc voltage 30V, and the resistor R14 is connected in parallel with the resistor R15.
As shown in fig. 3, the acquisition module 240 includes a mutual inductor L1 and a capacitor C4 connected in parallel, a capacitor E4 having a positive terminal connected to one terminal of the capacitor C4, and a resistor R6 connected to the other terminal of the capacitor E4, wherein the other terminal of the resistor R6 is connected to pin 1 of the chip module 210, and the other terminal of the capacitor C4 is connected to pin 3 of the chip module 210.
As shown in fig. 3, the execution module 250 includes a button RESET and a relay RY1, the relay RY1 includes a coil and a normally open switch, one end of the coil is connected to the dc voltage 30V, the other end is connected to the ground, the normally open switch is connected in series to the ACL line and the ACN line, and the normally open switch is installed in cooperation with the button RESET.
The ACL wire and the ACN wire connected with the commercial power are connected with the execution module 250, then pass through the mutual inductance coil L1 and are connected with the load. When the current flowing through the ACL line is different from the current flowing through the ACN line in magnitude and exceeds a set value, the mutual inductor L1 can generate an instantaneous signal to the chip module 210, the chip module 210 controls the conduction of the silicon controlled rectifier Q4 so as to short circuit the coil of the relay RY1, and therefore the relay RY1 can be turned off instantaneously, and then the load is turned off so as to ensure the personal safety of a user.
When the leakage or the simulation leakage condition occurs, the coil of the relay RY1 loses power, the suction force disappears instantly to enable the normally open switch of the relay RY1 to bounce, so that the ACL line and the ACN line are disconnected, and the leakage protection effect that the load is powered off due to the generation of the leakage is realized.
The button RESET is pressed manually, and along with the button RESET being pressed, the normally open switch of the relay RY1 can be pressed down, when the button is pressed to the lowest point, if the two ends of the coil of the relay RY1 are electrified and no electric leakage occurs at the moment, the normally open switch of the relay RY1 is closed, so that the corresponding ACL line and the ACN line are conducted, and the load is electrified to work. If no electricity or electricity leakage occurs at the two ends of the coil of the relay RY1, the normally open switch of the relay RY1 bounces, so that the load loses electricity.
In this embodiment, the device further includes a second driving module 300, a testing module 400, a detecting module 500, a key module 600, and a power processing module 700.
As shown in fig. 4, the second driving module 300 includes a chip IC4, the chip IC4 is type YX-9025M, pin 2 of the chip IC4 is connected to pin 4 of the wireless control module 100, pin 3 of the chip IC4 is connected to pin 6 of the wireless control module 100, and the wireless control module 100 transmits a control signal to the chip IC4 to implement control.
Pin 4 of chip IC4 is connected to dc voltage 3.3V, a capacitor C11 is connected between pin 4 of chip IC4 and ground, the serially connected capacitors C12 and C13 are connected in parallel between pin 5 and pin 8 of chip IC4, a capacitor C14 and a motor or electromagnetic valve DCF1/DJ1 are connected in parallel between pin 5 and pin 8 of chip IC4, and pin 6 and pin 7 of chip IC4 are connected to the connection end of capacitor C12 and capacitor C13 and ground.
The wireless control module 100 can realize the purpose of pressing the key RESET by matching with the second driving module 300 according to the remote control signal of the mobile phone APP. The actuation of the key RESET can be controlled by the action of a motor or solenoid DCF1/DJ1 in combination with a lever principle or a gear transmission principle.
As shown in fig. 5, the TEST module 400 includes a switch TEST, one end of which is connected to an ACL line through a wire passing through a trans coil L1, and the other end of which is connected to an ACN line passing through a trans coil L1 after being connected to a resistor R16 in series. The key TEST is manually pressed, so that a leakage current of 30MA can be simulated, the leakage protector is instantly reset when in work, and the TEST device is used for testing whether the leakage protector has a leakage protection function.
The testing module 400 further comprises a thyristor Q5, a pin 8 of the wireless control module 100 is connected in series with a resistor R17 and then connected with the control end of the thyristor Q5, and the thyristor Q5 is connected in parallel with two ends of the key TSET.
When the wireless control module 100 controls the conduction of the thyristor Q5, the remote action of the key TEST of the earth leakage protector can be remotely and analog controlled. In other embodiments, the manner in which the analog key TEST is pressed may be implemented in other manners, such as mechanical manners like a motor and a solenoid valve described above.
In this embodiment, pressing the button RESET to charge the load (without leakage), and pressing the switch TEST can simulate a leakage current to make the load lose power, thereby detecting whether the leakage protector can still normally perform leakage protection.
By introducing the wireless control module 100, the action of the key RESET can be controlled through a motor or an electromagnetic valve DCF1/DJ1, and meanwhile, the key TEST can be simulated through a silicon controlled rectifier Q5. Therefore, the remote control leakage protector which is the same as the manual control leakage protector can be realized through the mobile phone APP.
As shown in fig. 6, the detection module 500 includes a diode D1, an anode of the diode D1 is connected to an ACL line passing through the transformer L1, a cathode of the diode D1 is connected to an anode of a diode of the optocoupler IC3, a cathode of a diode of the optocoupler IC3 is connected to an ACN line passing through the transformer L1 after being connected to a resistor R17 in series, and the other two ends of the optocoupler IC3 are connected to 3.3V at one end and to ground at the other end through a resistor R18 and are connected to the pin 10 of the wireless control module 100.
The wireless control module 100 can detect whether the load terminal of the earth leakage protector is powered on, so as to determine the state of the earth leakage protector. In other embodiments, this approach may be used for step-down detection, or zero-crossing detection, for example, for ACL or ACN lines.
Through increasing detection module 500 for thereby wireless control module 100 can real-timely know the state of earth-leakage protector output through the level that detects its detection port, thereby can master the state that earth-leakage protector is located at any time and realize the control through cell-phone APP.
As shown in fig. 7, the key module 600 is a circuit for facilitating the configuration of the wireless control module 100, and after the configuration key SW1 is connected in parallel with the capacitor C10, one end of the circuit is grounded, and the other end of the circuit is connected to the pin 11 of the wireless control module 100 and the resistor R18, the other end of the resistor R18 is connected to the dc voltage 3.3V and the anode of the LED1, and the cathode of the LED1 is connected in series to the resistor R19 to the pin 2 of the wireless control module 100.
The user can carry out pairing operation of the wireless control module 100 and the mobile phone APP by pressing the configuration key SW1 in combination with lighting of the LED1 according to the product specification.
As shown in fig. 8, the power processing module 700 converts the commercial power into dc voltage required by each part. An ACN wire is connected with a resistor R1 and a resistor R2 in series and then connected with a rectifier bridge DB1, a safety regulation capacitor ZC1 is connected with two ends of a series resistor R1 and a resistor R2 in parallel, an ACL wire is connected with a safety resistor PR1 in series and then connected with a rectifier bridge DB1, so that direct current voltage is obtained, the resistor R1, the resistor R2, the safety regulation capacitor ZC1 and the safety resistor PR1 form a resistance-capacitance voltage reduction circuit, the resistor R3 is connected with a voltage stabilizing diode ZD1 in series and then connected with the positive electrode and the negative electrode of the rectifier bridge DB1 in parallel to obtain voltage 30V, the voltage E1 and the capacitor C1 are connected in parallel to obtain stable direct current voltage 30V, and the direct current voltage 30V is used for providing for a coil of a relay RY1 and the first driving module 230.
The positive electrode of the rectifier bridge DB1 is connected with the capacitor C1 in parallel and then connected with the resistor R4 in series, and then connected with the capacitor E2 and the capacitor C2 in parallel to obtain a direct current 26V voltage, and the direct current 26V voltage supplies power for the chip module 210 and peripheral circuits.
The direct current 30V voltage is connected in series with the power resistor R5 and then connected with the input end of the voltage-stabilizing triode W1, the capacitor E3 and the capacitor C3 are connected in parallel between the output end of the voltage-stabilizing triode W1 and the ground to obtain the direct current voltage of 3.3V, and the direct current voltage of 3.3V supplies power for the wireless control module 100, the second driving module 300, the detection module 500 and the key module 600. In other embodiments, other switching power supplies, batteries, etc. may be used to provide power.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. A earth-leakage protector, comprising:
the leakage protection circuit is used for collecting leakage current on a line between the commercial power and the load, comparing the collected leakage current with a preset threshold value, and disconnecting the line between the commercial power and the load if the leakage current is greater than the preset threshold value;
and the wireless control module is in wireless connection with the terminal and is used for triggering signals according to the execution command of the terminal and transmitting corresponding signals to the leakage protection circuit to select the preset threshold value.
2. A earth-leakage protector according to claim 1, characterized in that the earth-leakage protection circuit comprises an earth-leakage current selection module for outputting a corresponding preset threshold value in response to a corresponding signal triggered by the wireless control module.
3. A leakage protector according to claim 1, characterized in that the leakage protection circuit comprises a collection module for collecting leakage current on a line between the mains and the load.
4. A leakage protector according to claim 1, wherein the leakage protection circuit comprises a first driving module and an execution module, the first driving module is used for driving the execution module to disconnect a line between the commercial power and the load, and the execution module is used for controlling the disconnection and conduction of the line between the commercial power and the load.
5. A leakage protector according to claim 4, wherein the leakage protector further comprises a second driving module, and the second driving module is configured to drive the execution module to conduct a line between the utility power and the load under the control of the wireless control module.
6. A earth-leakage protector as claimed in claim 1, characterized in that the earth-leakage protection circuit further comprises a chip module.
7. A earth-leakage protector as claimed in claim 1, characterized in that the earth-leakage protector further comprises a testing module for forming an earth-leakage current on the line between the mains and the load, either manually or under the control of the wireless control module.
8. A leakage protector according to claim 1, wherein the leakage protector further comprises a detection module for detecting whether a line between the utility power and the load is powered, so as to determine the operating state of the leakage protection circuit, and feeding the operating state back to the terminal through the wireless control module.
9. A leakage protector according to claim 1, further comprising a power processing module for providing power.
10. A earth-leakage protector according to claim 1, characterized in that the earth-leakage protector further comprises a key module for pairing the wireless control module with the terminal.
CN202110688250.9A 2021-06-21 2021-06-21 Leakage protector Active CN113363935B (en)

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Publication number Priority date Publication date Assignee Title
CN102332702A (en) * 2011-09-15 2012-01-25 樊嵩 Intelligent real-time on-line displaying and controlling leakage protector and control method thereof
KR101225125B1 (en) * 2012-08-29 2013-01-22 (주) 퓨처파워텍 Remote automatic control system and control method having diagnosis function of accident prediction through monitor-analysis of electric quality
US20140009299A1 (en) * 2012-07-08 2014-01-09 International Intelligent Metering, LLC Indirect measurement method and system for monitoring and reporting leakage currents
CN103516053A (en) * 2013-10-17 2014-01-15 塞里克鲁能源科技江苏有限公司 Outdoor lighting power distribution cabinet protection controller
CN110289593A (en) * 2019-07-25 2019-09-27 国网四川省电力公司阿坝供电公司 A kind of intelligent rural power grids leakage protection system based on ubiquitous Internet of Things
CN210577737U (en) * 2019-09-23 2020-05-19 西门子（中国）有限公司 Residual current protection device and system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102332702A (en) * 2011-09-15 2012-01-25 樊嵩 Intelligent real-time on-line displaying and controlling leakage protector and control method thereof
US20140009299A1 (en) * 2012-07-08 2014-01-09 International Intelligent Metering, LLC Indirect measurement method and system for monitoring and reporting leakage currents
KR101225125B1 (en) * 2012-08-29 2013-01-22 (주) 퓨처파워텍 Remote automatic control system and control method having diagnosis function of accident prediction through monitor-analysis of electric quality
CN103516053A (en) * 2013-10-17 2014-01-15 塞里克鲁能源科技江苏有限公司 Outdoor lighting power distribution cabinet protection controller
CN110289593A (en) * 2019-07-25 2019-09-27 国网四川省电力公司阿坝供电公司 A kind of intelligent rural power grids leakage protection system based on ubiquitous Internet of Things
CN210577737U (en) * 2019-09-23 2020-05-19 西门子（中国）有限公司 Residual current protection device and system

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