CN207200254U - Power line leakage current detects protection device and electrical appliance - Google Patents
Power line leakage current detects protection device and electrical appliance Download PDFInfo
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- CN207200254U CN207200254U CN201721222432.2U CN201721222432U CN207200254U CN 207200254 U CN207200254 U CN 207200254U CN 201721222432 U CN201721222432 U CN 201721222432U CN 207200254 U CN207200254 U CN 207200254U
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- 238000001514 detection method Methods 0.000 claims abstract description 163
- 230000001681 protective Effects 0.000 claims abstract description 20
- 238000007689 inspection Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 16
- 230000005611 electricity Effects 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 12
- 239000010703 silicon Substances 0.000 description 12
- 230000001960 triggered Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 206010002515 Animal bite Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000000737 periodic Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
The utility model discloses a kind of power line leakage current detection protection device and electrical appliance.The device includes：Switch element, it is configured as electrically connected between control signal and output end；Residual current protective unit, it includes switch drive module and detection of electrical leakage module, and switch drive module is configured to leakage current signal according to detected by detection of electrical leakage module come controlling switch unit, wherein, detection of electrical leakage module also includes：Detection of electrical leakage line, it, which is configured to detect on the first supply lines and/or the second supply lines, whether there is leakage current；Signal feedback line, it is configured to detect whether detection of electrical leakage line opens a way；Test cell, it includes test switch, and is coupled to residual current protective unit, and when test switch closure, switch drive module is according to the signal on signal feedback line come controlling switch unit.
Description
Technical field
It the utility model is related to electric field, more particularly to a kind of power line leakage current detection protection device.
Background technology
Power line leakage current detection protection device is a kind of electricity consumption fire safety evaluating protection device, and its primary structure is to carry
The power line of plug, major function are to detect power supply plug to the power line between load appliance (such as air conditioner, dehumidifier)
Leakage current occurs between live wire, zero line etc. and wire overcoat (shielding), cuts off electrical equipment power supply, prevents the generation of fire,
To provide safeguard protection.Prevent caused by the live wire in power line, zero line, ground wire aging, abrasion, extruding or animal bite etc.
Arc fault fire caused by power line damage, dielectric strength decline.
Therefore, a kind of power line leakage current detection protection device that can be detected to insulated wire is needed badly.
Utility model content
Based on above mentioned problem, the utility model proposes detecting whether shielding line opens a way by signal feedback line, and introduce
Open circuit detection unit to carry out automatic detection to shielding line.
On the one hand the utility model proposes a kind of power line leakage current detection protection device, including：Switch element, its
It is configured as electrically connected between control signal and output end；Residual current protective unit, it includes switch drive module and leakage
Electro-detection module, the switch drive module are configured to be controlled according to the leakage current signal detected by the detection of electrical leakage module
The switch element is made, wherein, the detection of electrical leakage module also includes：Detection of electrical leakage line, it is configured to detect the first supply lines
And/or second whether there is leakage current on supply lines；Signal feedback line, it is configured to detect whether the detection of electrical leakage line is opened
Road；Test cell, it includes test switch, and is coupled to the residual current protective unit, when the test switch closure, institute
Switch drive module is stated according to the signal on the signal feedback line to control the switch element.
By above-mentioned embodiment, when test switch closure, come by whether test signal can be provided to drive module
Whether open a way in detection test signal loop.
In one embodiment, at least the first test is formed by the test cell and the residual current protective unit to return
Road, when the test switch closure, it is described electrically connected that the switch drive module controls the switch element to disconnect.
By the embodiment, when the detection of electrical leakage line 24 and/or signal feedback line 25 of power line are opened a way, test switchs
The pressure of TEST buttons is invalid, and tripping mechanism can not cut off the electricity supply output.In this way, can in order to user observe current production whether work
Make normal.
In one embodiment, the device also includes：Open circuit detection unit, it includes first detection module, the second inspection
Module is surveyed, wherein, the signal feedback line is coupled to first supply lines, second supply lines via first detection module
In a supply lines, the detection of electrical leakage line is coupled to first supply lines, described via second detection module
Another supply lines in two supply lines；Wherein, at least second is formed by the first detection module, the residual current protective unit
Test loop, second test loop are configured as：When the first detection module, the detection of electrical leakage line and the signal
During at least one open circuit in feedback line, it is described electrically connected that the switch drive module controls the switch element to disconnect.
By above-mentioned embodiment, when detection of electrical leakage line 24, signal feedback line 25 are opened a way, by first detection module and
The detection of second detection module, it is electrically connected to be disconnected.In addition, when first detection module open a way, and detection of electrical leakage line 24 and/
Or signal feedback line 25, when opening a way, test switch TEST pressures are invalid, and tripping mechanism can not cut off the electricity supply output.
In one embodiment, the first detection module includes first resistor and the first diode being connected in series,
Second detection module includes second resistance and the second diode being connected in series.
In one embodiment, the device also includes housing, for accommodating the switch element, the earth leakage protective list
It is at least one in first, described test cell and the open circuit detection unit.
The utility model second aspect proposes a kind of power line leakage current detection protection device, and it includes：Switch is single
Member, it is configured as electrically connected between control signal and output end；Residual current protective unit, it includes switch drive module
With detection of electrical leakage module, the switch drive module is configured to the leakage current signal according to detected by the detection of electrical leakage module
To control the switch element, wherein, the detection of electrical leakage module also includes：Detection of electrical leakage line (24), it is configured to detection extremely
It whether there is leakage current on few first supply lines or the second supply lines；Open a way detection unit, it includes first detection module, the
Two detection modules, and the detection of electrical leakage line is coupled to first supply lines, described via the first detection module
A supply lines in two supply lines, second detection module are coupled in first supply lines, second supply lines
Another supply lines；Wherein, test loop is at least formed by the first detection module, the residual current protective unit, and
The test loop is configured as：When the first detection module and/or the detection of electrical leakage line are opened a way, the switch drive
It is described electrically connected that module controls the switch element to disconnect.
In one embodiment, the first detection module includes first resistor and the first diode being connected in series,
Second detection module includes second resistance and the second diode being connected in series.
In one embodiment, the device includes：Signal feedback line (25), and the detection of electrical leakage line is via described
Signal feedback line is coupled to the first detection module, and then the first detection module is set away from load-side.In this way,
First detection module can be placed in the housing of plug 1.
In one embodiment, the device includes：Housing, for accommodating the switch element, the earth leakage protective list
It is at least one in first and described open circuit detection unit.
The utility model third aspect proposes a kind of electrical appliance, and it includes：Such as the power supply of foregoing any embodiment
Line leakage current detects protection device.
By implementing the technical solution of the utility model, it can not only realize and manually shielding line is detected, moreover it is possible to
It is enough that automatically shielding line is detected when product works, so as to improve security.In addition, the utility model also has electricity
Line structure is simple, low cost and other advantages, is adapted to popularization and application.
Brief description of the drawings
Refer to the attached drawing shows and illustrates embodiment.These accompanying drawings be used for illustrate general principle, so as to illustrate only for
Understand the necessary aspect of general principle.These accompanying drawings are not in proportion.In the accompanying drawings, identical reference represents similar
Feature.
Fig. 1 is traditional LCDI device technique schematic diagrams；
Fig. 2 is the outline structural diagram according to the utility model embodiment；
Fig. 3 is the power line leakage current detection protection device Organization Chart according to the utility model embodiment；
Fig. 4 is the schematic diagram according to first embodiment of the present utility model；
Fig. 5 is the schematic diagram according to second embodiment of the present utility model；
Fig. 6 is the schematic diagram according to 3rd embodiment of the present utility model；
Fig. 7 is the schematic diagram according to fourth embodiment of the present utility model；
Fig. 8 is the schematic diagram according to the 5th embodiment of the present utility model；
Fig. 9 is the schematic diagram according to sixth embodiment of the present utility model；
Figure 10 is the schematic diagram according to the 7th embodiment of the present utility model.
Embodiment
In the specific descriptions of following preferred embodiment, by with reference to forming the appended attached of the utility model part
Figure.Appended accompanying drawing, which has been illustrated by way of example, can realize specific embodiment of the present utility model.The implementation of example
Example is not intended as limit according to all embodiments of the present utility model.It is appreciated that without departing from the scope of the utility model
Under the premise of, other embodiment can be utilized, structural or logicality modification can also be carried out.Therefore, it is following specific to retouch
State and nonrestrictive, and the scope of the utility model is defined by the claims appended hereto.
Fig. 1 is traditional LCDI devices.Inventor has found that traditional LCDI is deposited by substantial amounts of theoretical and experimental analysis
In following defect：
First, as protection device, technical standard requires sets reset switch RESET and test to switch on device
TEST, reset switch RESET are used to switch on power, and test switch TEST and be used to verify whether product protection function is normal, use
Family needs periodic operation test switch TEST and reset switch RESET in use, whether normal carrys out verifying attachment function.
But the test switch TEST of existing LCDI devices be only able to detect device plug inside circuit and tripping mechanism whether just
Often, do not detect detection of electrical leakage line (shielding line) in plug exterior power line to end leakage current test function whether just
Often, when detection of electrical leakage line open circuit in power line, even if user is operating test switch TEST and reset switch RESET indicator functions just
Often, but the device does not have residual current protection function, serious potential safety hazard be present.
Secondly, traditional LCDI devices typically knit circuit and aluminium foil cladding current-carrying conductor as shielding line using 35% cuprophane,
And the power line is in use, because power line moved for a long time, bend, extrude, aging or animal are baited so that detection
Leakage current shielding line open circuit, and then cause LCDI devices lose residual current protection function, even if operation test switch TEST and
Reset switch RESET can judge whether shielding line opens a way, but user will not also go operation test to open at any time in use
TEST and reset switch RESET is closed, therefore there is also certain potential safety hazard.
The utility model is directed to a kind of power line leakage current detection protection device, and the device includes signal feedback line
Whether opened a way with the detection of electrical leakage line (shielding line) for detecting, monitoring in power line.In this way, test switch TEST by operating
Whether detection detection of electrical leakage line opens a way (disconnection).In addition, the device includes open circuit detection unit, for detecting, monitoring power supply
Whether the detection of electrical leakage line in line opens a way, and when the detection of electrical leakage line open circuit in power line, the device will automatically cut off power supply electricity
Source, so as to provide safeguard protection to electrical appliance.
As shown in Fig. 2 power line leakage current detection protection device includes the intercalation part 1 with switch element and external electricity
Source line 2, wherein, intercalation part 1 is additionally provided with test switch TEST and reset switch RESET.In the embodiment shown in figure 2,
Power line 2 include live wire (L) 21, zero line (N) 22, ground wire (G) 23, detection of electrical leakage line (shielding line) 24, signal feedback line 25, absolutely
Edge is outer by 27, wherein, signal feedback line 25 is the conductor with independent insulating barrier, the optional position that may be provided in power line 2.
The profile of power line 2 can be circular or lenticular wire or other profiles that can be machined side by side.It should be understood that
In other embodiments, other signal wires can also be only included in power line 2.
Fig. 3 is the power line leakage current detection protection device Organization Chart according to the utility model embodiment.Power line is let out
Leakage current test protection device 10 includes：Switch element 103, it is configured as between control signal 101 and output end 102
It is electrically connected；And residual current protective unit 104, it includes switch drive module 104a and detection of electrical leakage module 104b, wherein, open
Close drive module 104a and be configured to leakage current signal according to detected by detection of electrical leakage module 104b come controlling switch unit
103.Specifically, detection of electrical leakage module 104b also includes detection of electrical leakage line, and it is configured to detect the first supply lines and/or second
It whether there is leakage current on supply lines；Signal feedback line, it is configured to detect whether detection of electrical leakage line opens a way.The power line is let out
Leakage current test protection device also includes test switch TEST, and it is coupled to signal feedback line, when test switch TEST closures,
Switch drive module 104a is according to the signal on signal feedback line come controlling switch unit 103.
Fig. 4 is the schematic diagram according to first embodiment of the present utility model.As shown in figure 4, detection of electrical leakage line in power line 2
24 one end A is connected with control circuit R2, and other end B is connected with one end C of signal feedback line 25, its signal feedback line 25
Other end D with test switch TEST be connected, therefore, test switch TEST detection of electrical leakage is coupled to by signal feedback line 25
Line 24.
When press test switch TEST switch, simulated leakage electric current from L lines by resistance R4, test switch TEST switch,
Signal feedback line 25, shielding line 24 and resistance R2, R3, diode D2, solenoid SOL to N lines form test loop.The simulation is leaked
Electric current will cause the rise of resistance R3 both end voltages, and then drive controllable silicon SCR conducting.As shown in Figure 4, when controllable silicon SCR turns on
When, N lines, solenoid SOL, controllable silicon SCR, diode D1 to L lines form dropout loop, will be produced on solenoid SOL larger
Electric current, form sufficiently large magnetic field so that RESET switch trips, and then cut off the electricity supply.If arbitrary circuit in test loop
Or element open circuit, when pressure test switchs TEST, product will not thread off.Therefore, user can be by operating test switch
Whether TEST is intact to detect the shielding line 24 of power line.It should be understood that according to the difference of application, test loop can be detected
Arbitrary element whether normal work.
Fig. 5 is the schematic diagram according to second embodiment of the present utility model.Compared to the power line leakage current inspection in Fig. 4
Protection device is surveyed, the power line leakage current detection protection device in Fig. 5 also includes open circuit detection unit 200.As shown in Figure 5,
Open circuit detection unit 200 includes first detection module (D3, R5) and the second detection module (D4, R6).As shown in Figure 5, power line 2
One end A of middle detection of electrical leakage line 24 is connected with control circuit R2, and other end B is connected with one end C of signal feedback line 25, letter
The other end D of number feedback line 25 is connected with test switch TEST, and therefore, test switch TEST is coupled by signal feedback line 25
To detection of electrical leakage line 24.In addition, L lines are coupled in the D ends of signal feedback line 25 by the second detection module, and N lines are via spiral shell
Spool SOL, first detection module are coupled to the A ends of detection of electrical leakage line 24.
When the normal work of detection of electrical leakage line 24 (not opening a way), by being configured to resistance R5, R6, A points are limited in
Compared with low potential, controllable silicon SCR will not be triggered, and product is by normal work.When any position open circuit on detection of electrical leakage line 24,
So as to be formed from N lines, via solenoid SOL, diode D3, resistance R5, resistance R2, resistance R3, diode D1 and then L lines are reached
Current path.The voltage at resistance R3 both ends will rise, and then trigger controllable silicon SCR conducting.When controllable silicon SCR, solenoid
When SOL, diode D1 form loop, solenoid SOL, which produces magnetic field, makes reset switch RESET thread off, and cuts off the electricity supply.
Similarly, when any elements such as diode D4, resistance R6, signal feedback line 25 are opened a way, can equally cut off the electricity supply.
Therefore, the power line leakage current detection protection device in Fig. 5 can be realized to detection of electrical leakage line 24, diode
The automatic detection of the open circuits such as D4, resistance R6, signal feedback line 25.
Fig. 6 is the schematic diagram according to 3rd embodiment of the present utility model.Detect and protect with the power line leakage current in Fig. 5
Protection unit is similar, and the power line leakage current detection protection device in Fig. 6 includes open circuit detection unit 300.When detection of electrical leakage line
During 24 normal work, by resistance R5, R6 partial pressure, A points are limited in will not be triggered compared with low potential, controllable silicon SCR, and product will
Normal work.When detection of electrical leakage line 24 any position open circuit when, from L lines, diode D3, resistance R5, resistance R2, resistance R3,
Diode D2, solenoid SOL to N lines form current path, and resistance R3 both end voltages will rise, and then trigger controllable silicon SCR and lead
It is logical.Now, solenoid SOL, which produces magnetic field, makes product thread off, and cuts off the electricity supply.Therefore, the power line leakage current detection in Fig. 6 is protected
Protection unit can realize the automatic detection opened a way to detection of electrical leakage line 24.
The utility model also proposed another power line leakage current detection protection device, and it includes：Switch element
103, it is configured as electrically connected between control signal 101 and output end 102；And residual current protective unit 104, it is wrapped
Switch drive module 104a and detection of electrical leakage module 104b are included, wherein, switch drive module 104a is configured to according to detection of electrical leakage
Leakage current signal detected by module 104b carrys out controlling switch unit 103.Specifically, detection of electrical leakage module 104b also includes
Detection of electrical leakage line and open circuit detection unit, wherein, detection of electrical leakage line is configured as detecting the first supply lines and/or the second supply lines
It is upper to whether there is leakage current.Open circuit detection unit includes first detection module and the second detection module, and the first supply lines leads to
Cross first detection module, detection of electrical leakage module and the second detection module and be coupled to the second supply lines.The power line leakage current is examined
Surveying protection device also includes test switch TEST, and it is coupled to detection of electrical leakage line, when test switch TEST closures, switch drive
Module 104a drive controls switch element 103 is electrically connected to disconnect.It is illustrated with reference to Fig. 7-10 pairs of above-described embodiments.
Fig. 7 is the schematic diagram according to fourth embodiment of the present utility model.As shown in fig. 7, open circuit detection unit 400 includes
First detection module (D3, R5) and the second detection module (D4, R6).First detection module is coupling between N lines and shielding line 24,
Second detection module is coupling between shielding line 24 and L lines.In this way, when shielding line is without open circuit, A points are limited in relatively low electricity
Position, makes controllable silicon SCR not to be triggered, and product is by normal work.When any position of shielding line 24 is opened a way, N lines and L lines it
Between, controllable silicon will be triggered by solenoid SOL, diode D3, resistance R5, R2, R3 and diode the D1 current path formed
SCR is turned on, so that controllable silicon SCR, solenoid SOL, diode D1 form loop.Now, solenoid SOL produces magnetic field and made
Product is threaded off, and is cut off the electricity supply, so as to realize the automatic detection opened a way to detection of electrical leakage line 24.
Fig. 8 is the schematic diagram according to the 5th embodiment of the present utility model.Detect and protect with the power line leakage current in Fig. 7
Protection unit is similar, and the power line leakage current detection protection device in Fig. 8 includes open circuit detection unit 500.When shielding line 24 is appointed
When one position is opened a way, L lines, diode D3, resistance R5, resistance R2, resistance R3, diode D2, solenoid SOL, N line form electric current
Path, triggering controllable silicon SCR conducting so that solenoid SOL, which produces magnetic field, makes product thread off, and cuts off the electricity supply.So as to realize to screen
Cover the automatic detection of the open circuit of line 24.
Fig. 9 is the schematic diagram according to sixth embodiment of the present utility model.Compared to the power line leakage current inspection in Fig. 7
Protection device is surveyed, the open circuit detection unit 600 in Fig. 9 includes signal feedback line 25.In this way, by the way that the second detection module is passed through
It can be connected by signal feedback line 25 with any point on L lines, in this way, resistance R6, diode D4 can be placed in into the shell of plug 1
In vivo.
Figure 10 is the schematic diagram according to the 7th embodiment of the present utility model.Compared to the power line leakage current in Fig. 8
Protection device is detected, the open circuit detection unit 700 in Figure 10 includes signal feedback line 25.In this way, by detecting mould by second
Block can be connected via signal feedback line 25 with any point on N lines, be inserted in this way, can be placed in resistance R6, diode D4
In first 1 housing.
By implementing the technical solution of the utility model, it can not only realize that manually operation test switch TEST is realized
Shielding line is detected, additionally it is possible to automatically shielding line open circuit is detected when product works, improves security.Separately
Outside, the utility model also has that circuit structure is simple, low cost and other advantages.
Therefore, although describing the utility model with reference to specific example, wherein these specific examples are merely intended to
It is exemplary, rather than the utility model is limited, but it is obvious to those skilled in the art
It is that on the basis of spirit and scope of the present utility model is not departed from, the disclosed embodiments can be changed, increased
Add or delete.
Claims (10)
1. a kind of power line leakage current detects protection device, it is characterised in that including：
Switch element, it is configured as electrically connected between control signal and output end；
Residual current protective unit, it includes switch drive module and detection of electrical leakage module, and the switch drive module is configured to basis
Leakage current signal detected by the detection of electrical leakage module controls the switch element, wherein, the detection of electrical leakage module
Also include：
Detection of electrical leakage line (24), it, which is configured to detect on the first supply lines and/or the second supply lines, whether there is leakage current；
Signal feedback line (25), it is configured to detect whether the detection of electrical leakage line opens a way；
Test cell, it includes test switch, and is coupled to the residual current protective unit, when the test switch closure,
The switch drive module controls the switch element according to the signal on the signal feedback line.
2. power line leakage current as claimed in claim 1 detects protection device, it is characterised in that at least single by the test
First and described residual current protective unit forms the first test loop, when the test switch closure, the switch drive module control
It is described electrically connected to make the switch element disconnection.
3. power line leakage current as claimed in claim 1 detects protection device, it is characterised in that also includes：
Open circuit detection unit, it includes first detection module, the second detection module, wherein, the signal feedback line is via first
Detection module is coupled to a supply lines in first supply lines, second supply lines, the detection of electrical leakage line via
Second detection module is coupled to another supply lines in first supply lines, second supply lines；
Wherein, the second test loop, second test are at least formed by the first detection module, the residual current protective unit
Loop is configured as：
It is described when at least one open circuit in the first detection module, the detection of electrical leakage line and the signal feedback line
It is described electrically connected that switch drive module controls the switch element to disconnect.
4. power line leakage current as claimed in claim 3 detects protection device, it is characterised in that the first detection module
Including the first resistor (R6) being connected in series and the first diode (D4), second detection module includes second be connected in series
Resistance (R5) and the second diode (D3).
5. power line leakage current as claimed in claim 3 detects protection device, it is characterised in that also includes：
Housing, it is single for accommodating the switch element, the residual current protective unit, the test cell and the open circuit detection
It is at least one in member.
6. a kind of power line leakage current detects protection device, it is characterised in that including：
Switch element, it is configured as electrically connected between control signal and output end；
Residual current protective unit, it includes switch drive module and detection of electrical leakage module, and the switch drive module is configured to basis
Leakage current signal detected by the detection of electrical leakage module controls the switch element, wherein, the detection of electrical leakage module
Also include：
Detection of electrical leakage line (24), it, which is configured to detect at least the first supply lines or the second supply lines, whether there is leakage current；
Open a way detection unit, it includes first detection module, the second detection module, and the detection of electrical leakage line is via described the
One detection module is coupled to a supply lines in first supply lines, second supply lines, second detection module
Another supply lines being coupled in first supply lines, second supply lines；
Wherein, test loop, and the test loop are at least formed by the first detection module, the residual current protective unit
It is configured as：
When the first detection module and/or the detection of electrical leakage line are opened a way, the switch drive module controls the switch
Unit disconnects described electrically connected.
7. power line leakage current as claimed in claim 6 detects protection device, it is characterised in that the first detection module
Including the first resistor (R6) being connected in series and the first diode (D4), second detection module includes second be connected in series
Resistance (R5) and the second diode (D3).
8. power line leakage current as claimed in claim 6 detects protection device, it is characterised in that including：
Signal feedback line (25), and the detection of electrical leakage line detects mould via the signal feedback line coupled to described first
Block, and then the first detection module is set away from load-side.
9. power line leakage current as claimed in claim 6 detects protection device, it is characterised in that including：
Housing, for accommodating at least one in the switch element, the residual current protective unit and the open circuit detection unit
It is individual.
A kind of 10. electrical appliance, it is characterised in that including：Power line leakage current inspection as described in any one of claim 1 to 9
Survey protection device.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721222432.2U CN207200254U (en) | 2017-09-22 | 2017-09-22 | Power line leakage current detects protection device and electrical appliance |
| US15/718,661 US10557883B2 (en) | 2017-09-22 | 2017-09-28 | Leakage current detection and protection device for power cord |
| US16/212,505 US10840698B2 (en) | 2017-09-22 | 2018-12-06 | Leakage current detection and protection device for power cord |
| US16/687,129 US11005260B2 (en) | 2017-09-22 | 2019-11-18 | Leakage current detection and interruption device for power cord, and power connector and appliance employing the same |
| US17/009,316 US11243265B2 (en) | 2017-09-22 | 2020-09-01 | Intelligent leakage current detection and interruption device for power cord |
| US17/238,693 US11480628B2 (en) | 2017-09-22 | 2021-04-23 | Power cord for use with a leakage current detection and interruption device |
| US17/486,107 US11536777B2 (en) | 2017-09-22 | 2021-09-27 | Intelligent leakage current detection and interruption device for power cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721222432.2U CN207200254U (en) | 2017-09-22 | 2017-09-22 | Power line leakage current detects protection device and electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207200254U true CN207200254U (en) | 2018-04-06 |
Family
ID=61786468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721222432.2U Active CN207200254U (en) | 2017-09-22 | 2017-09-22 | Power line leakage current detects protection device and electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207200254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907685A (en) * | 2019-12-16 | 2020-03-24 | 武汉朗德电气有限公司 | High-voltage cable leakage current monitoring device |
-
2017
- 2017-09-22 CN CN201721222432.2U patent/CN207200254U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907685A (en) * | 2019-12-16 | 2020-03-24 | 武汉朗德电气有限公司 | High-voltage cable leakage current monitoring device |
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