CN117650482A - Leakage detection safety protection circuit - Google Patents
Leakage detection safety protection circuit Download PDFInfo
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- CN117650482A CN117650482A CN202410122077.XA CN202410122077A CN117650482A CN 117650482 A CN117650482 A CN 117650482A CN 202410122077 A CN202410122077 A CN 202410122077A CN 117650482 A CN117650482 A CN 117650482A
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- 238000001514 detection method Methods 0.000 title claims abstract description 56
- 238000011084 recovery Methods 0.000 claims abstract description 38
- 230000005611 electricity Effects 0.000 claims abstract description 12
- 230000001960 triggered effect Effects 0.000 claims abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 2
Classifications
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- 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
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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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a leakage detection safety protection circuit, which relates to the field of leakage protection, and comprises: the load working module is used for leading in fire zero line voltage to work by the load; the leakage detection module is used for detecting whether the load leaks electricity or not, and the leakage detection module outputs leakage current for the power-off control module, the leakage recovery triggering module and the rechecking protection module when the load leaks electricity; the power-off control module is used for detecting whether the leakage detection module outputs leakage current for the first time when in operation; when receiving leakage current, switching off a first internal switch of the load working module; the beneficial effects of the invention are as follows: according to the invention, the leakage current recovery triggering module is arranged, after the power-off control module performs the leakage protection function, the voltage on the electric appliance load is discharged, whether the electric appliance load still leaks is detected again, the reinspection protection module is triggered to work when the electric appliance still leaks, the total power supply is disconnected, and meanwhile, the luminous indication module is arranged to indicate the abnormal leakage protection, so that the occurrence of electric shock accidents is reduced.
Description
Technical Field
The invention relates to the field of leakage protection, in particular to a leakage detection safety protection circuit.
Background
The existing leakage protection circuit lacks a detection feedback device, when the leakage protection function is not achieved, a user does not know the information, the load of the electric appliance can be touched, electric shock accidents are easy to occur, and improvement is needed.
Disclosure of Invention
The present invention is directed to a leakage detection safety protection circuit, which solves the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a leakage detection safety protection circuit comprising:
the load working module is used for leading in fire zero line voltage to work by the load;
the leakage detection module is used for detecting whether the load leaks electricity or not, and the leakage detection module outputs leakage current for the power-off control module, the leakage recovery triggering module and the rechecking protection module when the load leaks electricity;
the power-off control module is used for detecting whether the leakage detection module outputs leakage current for the first time when in operation; when receiving leakage current, switching off a first internal switch of the load working module;
the leakage flow recovery triggering module is used for discharging the voltage stored in the load storage device after the power-off control module works; stopping the pressure relief work after the time delay, driving the reinspection protection module to work, and triggering the first indicator lamp of the luminous indication module to emit light;
the rechecking protection module is used for rechecking whether the leakage detection module still outputs leakage current or not when in operation; if leakage current is still input, the internal switch at the second position of the load working module is disconnected, and the second position indicator lamp of the luminous indicator module is triggered to emit light; if no leakage current is input, the second indicator lamp of the luminous indication module is not triggered to emit light;
the luminous indication module is used for indicating the leakage information through the luminous indication of the indication lamp;
the output end of the load work module is connected with the input end of the leakage detection module, the output end of the leakage detection module is connected with the input end of the power-off control module, the first input end of the leakage flow recovery triggering module and the first input end of the recheck protection module, the first output end of the power-off control module is connected with the second input end of the leakage flow recovery triggering module, the second output end of the power-off control module is connected with the first input end of the load work module, the output end of the leakage flow recovery triggering module is connected with the second input end of the recheck protection module and the first input end of the luminous indication module, and the first output end of the recheck protection module is connected with the second input end of the luminous indication module.
As still further aspects of the invention: the load working module comprises a main live wire, a secondary live wire, a main zero wire, a secondary zero wire, a ground wire, a first switch, a second switch, a third switch, a fourth switch and a load, wherein the main live wire is connected with the secondary live wire through the third switch, the main zero wire is connected with the secondary zero wire through the fourth switch, the secondary live wire is connected with a first end of the load through the second switch, the secondary zero wire is connected with a second end of the load through the first switch, the third end of the load is connected with the ground wire, the first switch and the second switch form a first internal switch, and the third switch and the fourth switch form a second internal switch.
As still further aspects of the invention: the leakage detection module comprises a first resistor and a first diode, wherein one end of the first resistor is connected with a ground wire, the other end of the first resistor is connected with the anode of the first diode, and the cathode of the first diode is connected with the input end of the power-off control module, the first input end of the leakage current recovery trigger module and the first input end of the recheck protection module.
As still further aspects of the invention: the power-off control module comprises a first silicon controlled rectifier, a second resistor, a first relay and a second diode, wherein the positive electrode of the first silicon controlled rectifier is connected with the power supply voltage, the control electrode of the first silicon controlled rectifier is connected with the output end of the electric leakage detection module, the negative electrode of the first silicon controlled rectifier is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the first relay, the negative electrode of the second diode and the second input end of the leakage recovery triggering module, the other end of the first relay is grounded, and the positive electrode of the second diode is grounded.
As still further aspects of the invention: the leakage current recovery triggering module comprises a first power tube, a second power tube, a third resistor and a first capacitor, wherein the D electrode of the first power tube is connected with the output end of the leakage detection module, the S electrode of the first power tube is grounded, the G electrode of the first power tube is connected with the D electrode of the second power tube, the G electrode of the second power tube is connected with one end of the first capacitor, one end of the third resistor, the second input end of the rechecking protection module and the first input end of the luminous indication module, the other end of the first capacitor is grounded, and the other end of the third resistor is connected with the S electrode of the second power tube and the first output end of the outage control module.
As still further aspects of the invention: the rechecking protection module comprises a third power tube, a fourth bipolar transistor, a fifth bipolar transistor, a fourth resistor, a fifth resistor, a second relay and a third diode, wherein the D electrode of the third power tube is connected with the output end of the leakage detection module, the G electrode of the third power tube is connected with the output end of the leakage recovery triggering module, the S electrode of the third power tube is connected with the base electrode of the fourth bipolar transistor, the emitter electrode of the fourth bipolar transistor is connected with the base electrode of the fifth bipolar transistor, the collector electrode of the fourth bipolar transistor is connected with one end of the fourth resistor, the collector electrode of the fifth bipolar transistor is connected with one end of the fifth resistor, the other end of the fourth resistor is connected with the other end of the fifth resistor and the power supply voltage, the emitter electrode of the fifth bipolar transistor is connected with one end of the second relay, the cathode of the third diode and the second input end of the luminous indication module, the anode of the third diode is grounded, and the other end of the second relay is grounded.
As still further aspects of the invention: the luminous indication module comprises a fourth diode, a fifth diode, a sixth resistor and a seventh resistor, wherein the positive electrode of the fourth diode is connected with the output end of the leakage current recovery triggering module, the positive electrode of the fifth diode is connected with the first output end of the rechecking protection module, the negative electrode of the fourth diode is connected with one end of the sixth resistor, the other end of the sixth resistor is grounded, the negative electrode of the fifth diode is connected with one end of the seventh resistor, and the other end of the seventh resistor is grounded.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the leakage current recovery triggering module is arranged, after the power-off control module performs the leakage protection function, the voltage on the electric appliance load is discharged, whether the electric appliance load still leaks is detected again, the reinspection protection module is triggered to work when the electric appliance still leaks, the total power supply is disconnected, and meanwhile, the luminous indication module is arranged to indicate the abnormal leakage protection, so that the occurrence of electric shock accidents is reduced.
Drawings
Fig. 1 is a schematic diagram of a leakage detection safety protection circuit.
Fig. 2 is a circuit diagram of a load operation module.
Fig. 3 is a circuit diagram of the leakage detection module, the power-off control module, the leakage current recovery triggering module and the reinspection protection module.
Fig. 4 is a circuit diagram of the luminous indication module.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1, a leakage detection safety protection circuit includes:
the load working module 1 is used for leading the fire zero line voltage into the load X to work;
the leakage detection module 2 is used for detecting whether the load X leaks electricity or not, and the leakage detection module outputs leakage current for the power-off control module 3, the leakage recovery triggering module 4 and the reinspection protection module 5 when the load X leaks electricity;
the power-off control module 3 is used for detecting whether the leakage current is output by the leakage detection module 2 for the first time when in operation; when receiving the leakage current, switching off a first internal switch of the load working module 1;
the leakage flow recovery triggering module 4 is used for discharging the voltage stored in the storage device of the load X after the power-off control module 3 works; stopping the pressure relief work after the time delay, driving the reinspection protection module 5 to work, and triggering the first indicator lamp of the luminous indication module 6 to emit light;
the rechecking protection module 5 is used for detecting whether the leakage current is still output by the leakage detection module 2 or not during working; if leakage current is still input, the internal switch at the second position of the load working module 1 is disconnected, and the second position indicator lamp of the luminous indicator module 6 is triggered to emit light; if no leakage current is input, the second indicator lamp of the luminous indication module 6 is not triggered to emit light;
a luminous indication module 6 for indicating the leakage information by the luminous indication of the indication lamp;
the output end of the load work module 1 is connected with the input end of the electric leakage detection module 2, the output end of the electric leakage detection module 2 is connected with the input end of the power-off control module 3, the first input end of the leakage current recovery trigger module 4 and the first input end of the recheck protection module 5, the first output end of the power-off control module 3 is connected with the second input end of the leakage current recovery trigger module 4, the second output end of the power-off control module 3 is connected with the first input end of the load work module 1, the output end of the leakage current recovery trigger module 4 is connected with the second input end of the recheck protection module 5 and the first input end of the luminous indication module 6, and the first output end of the recheck protection module 5 is connected with the second input end of the luminous indication module 6.
In this embodiment: referring to fig. 2, the load working module 1 includes a main live wire L1, a secondary live wire L2, a main neutral wire N1, a secondary neutral wire N2, a ground wire E, a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, and a load X, wherein the main live wire L1 is connected to the secondary live wire L2 through the third switch S3, the main neutral wire N1 is connected to the secondary neutral wire N2 through the fourth switch S4, the secondary live wire L2 is connected to a first end of the load X through the second switch S2, the secondary neutral wire N2 is connected to a second end of the load X through the first switch S1, the third end of the load X is connected to the ground wire E, the first switch S1 and the second switch S2 form a first internal switch, and the third switch S3 and the fourth switch S4 form a second internal switch.
Under the condition that the load X does not leak electricity, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are all closed at the moment, the main live wire L1 and the main zero wire N1 are community power supply wires, the auxiliary live wire L2 and the auxiliary zero wire N2 are single household power supply wires, and 220V voltage is introduced into the load X based on the fact that the switches are all closed at the moment, so that electric work is achieved.
In another embodiment: in the application, the first switch S1, the second switch S2 (the first internal switch), the third switch S3 and the fourth switch S4 (the second internal switch) are two double-pole single-throw switches, and may be four single-pole single-throw switches.
In this embodiment: referring to fig. 3, the leakage detection module 2 includes a first resistor R1 and a first diode D1, one end of the first resistor R1 is connected to a ground line E, the other end of the first resistor R1 is connected to the positive electrode of the first diode D1, and the negative electrode of the first diode D1 is connected to the input end of the power-off control module 3, the first input end of the leakage current recovery trigger module 4, and the first input end of the recheck protection module 5.
When the load X shell leaks electricity, current on the live wire L2 flows to the ground wire E through the load X shell, voltage exists at the ground wire E, current is limited through the first resistor R1, and the first diode D1 outputs the leakage current to a later-stage circuit after rectification.
In another embodiment: a capacitor can be added to stabilize the rectified current.
In this embodiment: referring to fig. 3, the power-off control module 3 includes a first silicon controlled rectifier Z1, a second resistor R2, a first relay J1, and a second diode D2, where an anode of the first silicon controlled rectifier Z1 is connected to a power supply voltage VCC, a control electrode of the first silicon controlled rectifier Z1 is connected to an output end of the leakage detection module 2, a cathode of the first silicon controlled rectifier Z1 is connected to one end of the second resistor R2, another end of the second resistor R2 is connected to one end of the first relay J1, a cathode of the second diode D2, and a second input end of the drain recovery trigger module 4, another end of the first relay J1 is grounded, and an anode of the second diode D2 is grounded.
After leakage current is input, the first silicon controlled rectifier Z1 is conducted, the power supply voltage VCC supplies power to the first relay J1 through the first silicon controlled rectifier Z1 and the second resistor R2, the first relay J1 is powered on to work, the first switch S1 and the second switch S2 are controlled to be sprung on, the load X is disconnected from a loop of the live wire L2 and the null wire N2, the load X stops working, and continuous leakage is avoided. And simultaneously, voltage is provided for the leakage current recovery triggering module 4 to trigger the operation of the leakage current recovery triggering module.
In another embodiment: the second diode D2 may be omitted, and the second diode D2 serves as a drain diode to drain a large current generated at the moment when the first relay J1 starts to operate and stops operating.
In this embodiment: referring to fig. 3, the leakage current recovery triggering module 4 includes a first power tube V1, a second power tube V2, a third resistor R3, and a first capacitor C1, where a D electrode of the first power tube V1 is connected to an output end of the leakage detection module 2, an S electrode of the first power tube V1 is grounded, a G electrode of the first power tube V1 is connected to a D electrode of the second power tube V2, a G electrode of the second power tube V2 is connected to one end of the first capacitor C1, one end of the third resistor R3, a second input end of the rechecking protection module 5, a first input end of the light emitting indication module 6, and the other end of the first capacitor C1 is grounded, and the other end of the third resistor R3 is connected to an S electrode of the second power tube V2 and a first output end of the power outage control module 3.
After voltage input, based on no voltage on the first capacitor C1 at initial time, the second power tube V2 (PMOS) is conducted to provide high level for the first power tube V1 (NMOS), the first power tube V1 is conducted to be grounded, and the voltage in the energy storage device in the load X is discharged under the condition that the load X is powered off; along with the progress of first electric capacity C1 charging, common point A department is high level, triggers and rechecks protection module 5 work, and second power tube V2 is cut off, and first power tube V1 stops the bleeder, and if load X has cut off the power supply at this moment, this part of time can fully let out the voltage of energy storage device, if first relay J1 control trouble or outage control module 3 situation such as circuit break, first switch S1, second switch S2 still are in closed state, and load X still is in power supply state at this moment, and leakage detection module 2 continuously outputs the electric leakage current.
In this embodiment: referring to fig. 3, the recheck protection module 5 includes a third power transistor V3, a fourth bipolar transistor V4, a fifth bipolar transistor V5, a fourth resistor R4, a fifth resistor R5, a second relay J2, and a third diode D3, wherein the D pole of the third power transistor V3 is connected to the output end of the leakage detection module 2, the G pole of the third power transistor V3 is connected to the output end of the leakage recovery trigger module 4, the S pole of the third power transistor V3 is connected to the base of the fourth bipolar transistor V4, the emitter of the fourth bipolar transistor V4 is connected to the base of the fifth bipolar transistor V5, the collector of the fourth bipolar transistor V4 is connected to one end of the fourth resistor R4, the collector of the fifth bipolar transistor V5 is connected to one end of the fifth resistor R5, the other end of the fourth resistor R4 is connected to the other end of the fifth resistor R5, the voltage VCC, the S pole of the fifth bipolar transistor V5 is connected to the second end of the second resistor J2, the third diode D3 is connected to the other end of the third diode is connected to the ground, and the other end of the third diode is connected to the positive end of the light emitting module is indicated.
The common point A is high level, the third power tube V3 (NMOS) is conducted, at the moment, if leakage current still exists, the fourth bipolar transistor V4 and the fifth bipolar transistor V5 are triggered to be conducted, voltage is provided for the second relay J2, the second relay J2 is powered on, and the third switch S3 and the fourth switch S4 are controlled to be sprung. When the fault at the power-off control module 3 can not power off the load X, the first switch S1 and the second switch S2 (single room or single socket) are turned off, and then the third switch S3 and the fourth switch S4 are turned off (the whole household total power input) after the first switch S1 and the second switch S2 are turned off and invalid. The reinspection protection module 5 plays a role in leakage protection detection, and can provide further leakage protection.
In another embodiment: one of the fourth bipolar transistor V4 and the fifth bipolar transistor V5 may be omitted, and two triode amplified signals are provided here to avoid the shortage of the voltage output to the second relay J2 after the leakage current passes through the third power tube V3 and is amplified by a single triode.
In this embodiment: referring to fig. 4, the light emitting indication module 6 includes a fourth diode D4, a fifth diode D5, a sixth resistor R6, and a seventh resistor R7, wherein an anode of the fourth diode D4 is connected to the output end of the drain recovery trigger module 4, an anode of the fifth diode D5 is connected to the first output end of the recheck protection module 5, a cathode of the fourth diode D4 is connected to one end of the sixth resistor R6, another end of the sixth resistor R6 is grounded, a cathode of the fifth diode D5 is connected to one end of the seventh resistor R7, and another end of the seventh resistor R7 is grounded.
When the common point a is at a high level, the fourth diode D4 emits light to indicate, and when the common point B is at a high level, the fifth diode D5 emits light to indicate, and the current leakage information is indicated by the light emitting state.
In another embodiment: related buzzers, voice chips and the like can be additionally arranged, and family members can be prompted through sound.
The working principle of the invention is as follows: the load working module 1 is used for leading the fire zero line voltage into the load X to work; the leakage detection module 2 is used for detecting whether the load X leaks electricity or not, and the leakage current is output by the power-off control module 3, the leakage current recovery triggering module 4 and the rechecking protection module 5 when the load X leaks electricity; the power-off control module 3 is used for detecting whether the leakage detection module 2 outputs leakage current for the first time when in operation; when receiving the leakage current, switching off a first internal switch of the load working module 1; the leakage flow recovery triggering module 4 is used for discharging the voltage stored in the storage device of the load X after the power-off control module 3 works; stopping the pressure relief work after the time delay, driving the reinspection protection module 5 to work, and triggering the first indicator lamp of the luminous indication module 6 to emit light; the rechecking protection module 5 is used for detecting whether the leakage detection module 2 still outputs leakage current or not when in operation; if leakage current is still input, the internal switch at the second position of the load working module 1 is disconnected, and the second position indicator lamp of the luminous indicator module 6 is triggered to emit light; if no leakage current is input, the second indicator lamp of the luminous indication module 6 is not triggered to emit light; the luminous indication module 6 is used for indicating the leakage information through the luminous indication of the indicator lamp.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The utility model provides a leak detection safety protection circuit which characterized in that, this leak detection safety protection circuit includes:
the load working module is used for leading in fire zero line voltage to work by the load;
the leakage detection module is used for detecting whether the load leaks electricity or not, and the leakage detection module outputs leakage current for the power-off control module, the leakage recovery triggering module and the rechecking protection module when the load leaks electricity;
the power-off control module is used for detecting whether the leakage detection module outputs leakage current for the first time when in operation; when receiving leakage current, switching off a first internal switch of the load working module;
the leakage flow recovery triggering module is used for discharging the voltage stored in the load storage device after the power-off control module works; stopping the pressure relief work after the time delay, driving the reinspection protection module to work, and triggering the first indicator lamp of the luminous indication module to emit light;
the rechecking protection module is used for rechecking whether the leakage detection module still outputs leakage current or not when in operation; if leakage current is still input, the internal switch at the second position of the load working module is disconnected, and the second position indicator lamp of the luminous indicator module is triggered to emit light; if no leakage current is input, the second indicator lamp of the luminous indication module is not triggered to emit light;
the luminous indication module is used for indicating the leakage information through the luminous indication of the indication lamp;
the output end of the load work module is connected with the input end of the leakage detection module, the output end of the leakage detection module is connected with the input end of the power-off control module, the first input end of the leakage flow recovery triggering module and the first input end of the recheck protection module, the first output end of the power-off control module is connected with the second input end of the leakage flow recovery triggering module, the second output end of the power-off control module is connected with the first input end of the load work module, the output end of the leakage flow recovery triggering module is connected with the second input end of the recheck protection module and the first input end of the luminous indication module, and the first output end of the recheck protection module is connected with the second input end of the luminous indication module.
2. The leakage detection safety protection circuit of claim 1, wherein the load operation module comprises a main live wire, a secondary live wire, a main neutral wire, a secondary neutral wire, a ground wire, a first switch, a second switch, a third switch, a fourth switch, and a load, the main live wire is connected to the secondary live wire through the third switch, the main neutral wire is connected to the secondary neutral wire through the fourth switch, the secondary live wire is connected to a first end of the load through the second switch, the secondary neutral wire is connected to a second end of the load through the first switch, the third end of the load is connected to the ground wire, the first switch and the second switch form a first internal switch, and the third switch and the fourth switch form a second internal switch.
3. The leakage detection safety protection circuit according to claim 1, wherein the leakage detection module comprises a first resistor and a first diode, one end of the first resistor is connected with a ground wire, the other end of the first resistor is connected with the positive electrode of the first diode, and the negative electrode of the first diode is connected with the input end of the power-off control module, the first input end of the leakage current recovery trigger module and the first input end of the recheck protection module.
4. The leakage detection safety protection circuit according to claim 1, wherein the power-off control module comprises a first silicon controlled rectifier, a second resistor, a first relay and a second diode, wherein a positive electrode of the first silicon controlled rectifier is connected with a power supply voltage, a control electrode of the first silicon controlled rectifier is connected with an output end of the leakage detection module, a negative electrode of the first silicon controlled rectifier is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the first relay, a negative electrode of the second diode and a second input end of the leakage recovery trigger module, the other end of the first relay is grounded, and a positive electrode of the second diode is grounded.
5. The leakage detection safety protection circuit according to claim 1, wherein the leakage recovery triggering module comprises a first power tube, a second power tube, a third resistor and a first capacitor, wherein a D electrode of the first power tube is connected with an output end of the leakage detection module, an S electrode of the first power tube is grounded, a G electrode of the first power tube is connected with a D electrode of the second power tube, a G electrode of the second power tube is connected with one end of the first capacitor, one end of the third resistor, a second input end of the recheck protection module and a first input end of the luminous indication module, the other end of the first capacitor is grounded, and the other end of the third resistor is connected with an S electrode of the second power tube and a first output end of the outage control module.
6. The leakage detection safety protection circuit according to claim 1 or 5, wherein the rechecking protection module comprises a third power tube, a fourth bipolar transistor, a fifth bipolar transistor, a fourth resistor, a fifth resistor, a second relay and a third diode, wherein a D electrode of the third power tube is connected with an output end of the leakage detection module, a G electrode of the third power tube is connected with an output end of the leakage recovery trigger module, an S electrode of the third power tube is connected with a base electrode of the fourth bipolar transistor, an emitter electrode of the fourth bipolar transistor is connected with a base electrode of the fifth bipolar transistor, a collector electrode of the fourth bipolar transistor is connected with one end of the fourth resistor, a collector electrode of the fifth bipolar transistor is connected with one end of the fifth resistor, the other end of the fourth resistor is connected with the other end of the fifth resistor, a power supply voltage, an emitter electrode of the fifth bipolar transistor is connected with one end of the second relay, a cathode of the third diode is connected with a second input end of the light emitting indication module, an anode of the third diode is grounded, and the other end of the second relay is grounded.
7. The leakage detection safety protection circuit according to claim 1, wherein the light emitting indication module comprises a fourth diode, a fifth diode, a sixth resistor and a seventh resistor, the positive electrode of the fourth diode is connected with the output end of the leakage current recovery trigger module, the positive electrode of the fifth diode is connected with the first output end of the recheck protection module, the negative electrode of the fourth diode is connected with one end of the sixth resistor, the other end of the sixth resistor is grounded, the negative electrode of the fifth diode is connected with one end of the seventh resistor, and the other end of the seventh resistor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410122077.XA CN117650482B (en) | 2024-01-30 | 2024-01-30 | Leakage detection safety protection circuit |
Applications Claiming Priority (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033490A (en) * | 2024-04-15 | 2024-05-14 | 山东云开电力有限公司 | Safe power supply detection circuit of power switch cabinet |
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| CN116626533A (en) * | 2023-07-20 | 2023-08-22 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
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| JP2010210361A (en) * | 2009-03-10 | 2010-09-24 | American Denki Co Ltd | Leakage current inspection apparatus for distribution line |
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| CN118033490A (en) * | 2024-04-15 | 2024-05-14 | 山东云开电力有限公司 | Safe power supply detection circuit of power switch cabinet |
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| CN117650482B (en) | 2024-04-05 |
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