CN209016690U - Power supply line, power supply line leakage current detection protective device and electrical appliance - Google Patents
Power supply line, power supply line leakage current detection protective device and electrical appliance Download PDFInfo
- Publication number
- CN209016690U CN209016690U CN201821930686.4U CN201821930686U CN209016690U CN 209016690 U CN209016690 U CN 209016690U CN 201821930686 U CN201821930686 U CN 201821930686U CN 209016690 U CN209016690 U CN 209016690U
- Authority
- CN
- China
- Prior art keywords
- line
- detection
- power supply
- supply line
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of power supply line, power supply line leakage current detection protective device and electrical appliances, comprising: switch unit is configured as electrically connected between control signal and output end；Residual current protective unit, including switch drive module and detection of electrical leakage module, wherein detection of electrical leakage module further includes electric leakage detection line, is at least configured on the first supply lines of detection and/or the second supply lines with the presence or absence of leakage current；And switch drive module further includes solenoid component and semiconductor subassembly, solenoid component is coupled between the first supply lines and semiconductor subassembly, solenoid component includes at least two groups coil of parallel coupled, and semiconductor subassembly includes at least two semiconductor elements of parallel coupled；Wherein, when at least one group coil is not opened a way and when at least one semiconductor element is not opened a way at least two semiconductor elements at least two groups coil, the leakage current signal that switch drive module is detected according to detection of electrical leakage module is electrically connected to disconnect come control switch unit.
Description
Technical field
The utility model relates to electric fields more particularly to a kind of power supply line leakage current to detect protective device.
Background technique
It is a kind of electricity consumption fire safety evaluating protective device that power supply line leakage current, which detects protective device, and primary structure is to have
The power supply line of plug, major function are detections for the power supply line between plug to load appliance (such as air conditioner, dehumidifier)
Leakage current occurs between firewire, zero curve etc. and conducting wire protective layer (shielding), cuts off electrical equipment power supply, prevents the production of fire
It is raw, to provide safeguard protection.It prevents from biting because of firewire, zero curve, ground wire aging, abrasion, extruding or the animal in power supply line etc. and make
At power supply line damage, dielectric strength decline caused by arc fault fire.
Therefore, protective device can be detected to the power supply line leakage current that insulated wire is detected by needing one kind.
Utility model content
Based on the above issues, it the utility model proposes detecting whether shielding line opens a way by signal feedback line, and introduces
Open circuit detection unit detects shielding line automatically.
On the one hand the utility model proposes a kind of power supply line leakage current detection protective device, comprising: switch unit,
It is configured as electrically connected between control signal and output end；Residual current protective unit comprising switch drive module and leakage
Electro-detection module, wherein the detection of electrical leakage module further includes electric leakage detection line, is at least configured to the first supply lines of detection
And/or second whether there is leakage current on supply lines；And the switch drive module further includes solenoid component and partly leads
Body component, the solenoid component are coupled between first supply lines and the semiconductor subassembly, the solenoid component
At least two groups coil including parallel coupled, and the semiconductor subassembly includes at least two semiconductor elements of parallel coupled
Part；Wherein, when in at least two groups coil at least one group coil do not open a way and at least two semiconductor element
When at least one semiconductor element is not opened a way, electric leakage that the switch drive module is detected according to the detection of electrical leakage module
It is described electrically connected to disconnect to control the switch unit to flow signal.
In one embodiment, further includes: open circuit detection unit comprising first detection module and the second detection mould
Block, wherein the electric leakage detection line is coupled to second supply lines via the first detection module, wherein the switch
Drive module is additionally configured to open a way in response to the electric leakage detection line to control the switch unit to disconnect the electric power and connect
It connects.
In one embodiment, the solenoid component includes the first group of coil and second group of coil of parallel coupled,
And first group of coil and second group of coil are wrapped on identical or different coil rack or bracket.
In one embodiment, the semiconductor subassembly includes that the first semiconductor element of parallel coupled and the second half lead
Volume elements part, the anode of first semiconductor element are connected with the anode of second semiconductor element, and described the first half lead
The control electrode of volume elements part is connected with the first end of first capacitor with the control electrode of second semiconductor, and described the first half lead
The cathode of body is connected with the second end of the first capacitor with the cathode of second semiconductor, the first capacitor and the
One driving resistor coupled in parallel connection；Or the open circuit detection unit further includes third detection module, the electric leakage detection line also passes through
First supply lines, the anode and first detection module of first semiconductor element are coupled to by the third detection module
It is connected, the cathode of first semiconductor element is connected with the first end of first capacitor, first semiconductor element
Control electrode is connected with the second end of first capacitor, and the first capacitor is connect with the first driving resistor coupled in parallel, and described the second half
The anode of conductor element is connected with the third detection module, control electrode and the second capacitor of second semiconductor element
First end is connected, and the cathode of the second semiconductor element is connected with the second end of second capacitor, second capacitor with
Second driving resistor coupled in parallel connection.
In one embodiment, the first detection module includes the first resistor and first diode being connected in series,
Second detection module includes the second resistance being connected in series and the second diode.
In one embodiment, the third detection module includes the 3rd resistor being connected in series and third diode.
It in one embodiment, further include signal feedback line, and the electric leakage detection line is fed back via the signal
Line is coupled to the first detection module, wherein when signal feedback line open circuit, described in the switch drive module control
Switch unit is described electrically connected to disconnect.
It in one embodiment, further include test cell comprising test switch, and the test switchs direct coupling
It closes the semiconductor subassembly or is coupled to the semiconductor subassembly via the signal feedback line, wherein when the test
When closing the switch, it is described electrically connected to disconnect that the switch drive module controls the switch unit.
It in one embodiment, further include test cell comprising test switch, and the test switchs direct coupling
Close the semiconductor subassembly, wherein when the test closes the switch, the switch drive module controls the switch unit
It is described electrically connected to disconnect.
In one embodiment, further includes: shell, for accommodate the switch unit, the residual current protective unit with
And at least one of described open circuit detection unit.
In one embodiment, the semiconductor element includes any one of silicon-controlled, metal-oxide-semiconductor or triode.
The utility model second aspect proposes a kind of electrical appliance comprising: the leakage of power supply line described in any of the above item
Current detection protection device.
The utility model third aspect proposes the first supply lines, the second supply lines, ground wire, electric leakage detection line, at least one
Root signal feedback line and the outer quilt that insulate, wherein at least one signal feedback line is the conductor with independent insulating layer, described
Electric leakage detection line at least coats first supply lines and second supply lines, and the electric leakage detection line and it is described at least
A piece signal feedback line is wrapped by outside the insulation.
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 in product work, to improve safety.Furthermore due to using solenoid group
Part and semiconductor subassembly, so that when the coil damage in solenoid component or a semiconductor element in semiconductor subassembly
When part damages, it still is able to realize to the automatic detection of shielding line open circuit, the reliability of automatic detection function is increased, to mention
Safety is risen.In addition, the utility model also has many advantages, such as that circuit structure is simple, at low cost, it is suitble to promote and apply.
Detailed description of the invention
It is shown with reference to attached drawing and illustrates embodiment.These attached drawings for illustrating basic principle, thus illustrate only for
Understand the necessary aspect of basic principle.These attached drawings are not in proportion.In the accompanying drawings, identical appended drawing reference indicates similar
Feature.
Fig. 1 is traditional LCDI device technique schematic diagram；
Fig. 2 is the outline structural diagram according to the utility model embodiment；
Fig. 3 A is the structural schematic diagram of the power supply line of one embodiment according to the utility model；
Fig. 3 B is the structural schematic diagram of the power supply line of another embodiment according to the utility model；
Fig. 3 C is the cross sectional view of the power supply line of Fig. 3 A；
Fig. 3 D is the cross sectional view of the power supply line of Fig. 3 B；
Fig. 4 is the power supply line leakage current detection protective device architecture diagram according to the utility model embodiment；
Fig. 5 A to Fig. 5 D be according to the utility model first embodiment to fourth embodiment schematic diagram；
Fig. 6 A to Fig. 6 D is the schematic diagram of the 5th embodiment to the 8th embodiment according to the utility model；
Fig. 7 A to 7D is the schematic diagram of the 9th embodiment to the 12nd embodiment according to the utility model；
Fig. 8 A to 8D is the schematic diagram of the 13rd embodiment to the 16th embodiment according to the utility model；
Fig. 9 A to 9D is the schematic diagram of the 17th embodiment to the 20th embodiment according to the utility model；
Figure 10 A to 10D is the schematic diagram of the 21st embodiment to the 24th embodiment according to the utility model.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted into the appended attached of the utility model a part
Figure.The specific embodiment that can be realized the utility model has been illustrated by way of example in appended attached drawing.Exemplary implementation
Example is not intended to exhaustive all embodiments according to the present utility model.It is appreciated that without departing from the scope of the utility model
Under the premise of, it can use other embodiments, the modification of structure or logic can also be carried out.Therefore, below specifically to retouch
It states and unrestricted, and the scope of the utility model is defined by the claims appended hereto.Term as used herein " packet
Include ", "comprising" and similar terms be understood to open term, i.e., " including/including but not limited to ", expression may be used also
To include other content.Term " one embodiment " expression " at least one embodiment "；Expression is " at least for term " another embodiment "
One other embodiment ", etc..
Fig. 1 is traditional LCDI device.Inventor has found that traditional LCDI is deposited by a large amount of theoretical and experimental analysis
In following defect:
Firstly, technical standard is required is arranged reset switch RESET and test switch on device as protective device
TEST, reset switch RESET are for powering on, and whether test switch TEST is normal for verifying product protection function, uses
Family needs periodic operation to test switch TEST and reset switch RESET in use, whether just to carry out verifying attachment function
Often.But user needs to complete by operation " TEST " button simulated leakage current failure to the Function detection of LCDI device.
In practical applications, due to various reasons, few user's periodic operation " TEST " devices verify the completeness of defencive function,
Great hidden danger is brought to safety utilization of electric power.
Secondly, breaking down in some soft copy causes helix tube that cannot lead at present with the LCDI device of self-checking circuit
When electric, by indicator light, these observable modes such as button position come indicate product lose defencive function, remind user cannot
It continues to use.Such as physiology, defective personnel do not know proof protecting device failure, because LCDI device loses defencive function, but continue to
It uses, be easy to cause personal injury, there is security risk.
The utility model is directed to a kind of power supply line leakage current detection protective device, which includes signal feedback line
To detect, monitor whether the electric leakage detection line in power supply line (shielding line) opens a way.In this way, passing through operation test switch TEST
Whether detection electric leakage detection line opens a way (disconnection).In addition, the device includes open circuit detection unit, for detecting, monitoring power supply
Whether the electric leakage detection line in line opens a way, and when the electric leakage detection line open circuit in power supply line, which will automatically cut off power supply electricity
Source, to provide safeguard protection to electrical appliance.
As shown in Fig. 2, power supply line leakage current detection protective device includes intercalation part 1 and external electricity with switch unit
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 supply line 2 include firewire (L) 21, zero curve (N) 22, ground wire (G) 23, electric leakage detection line (shielding line) 24, signal feedback line 25,
Insulation is outer by 27, wherein signal feedback line 25 is the conductor with independent insulating layer, electric leakage detection line 24 at least coat L line with
N line and signal feedback line 25 and electric leakage detection line 24 are outer by 27 claddings by insulation, and signal feedback line 25, which can be set, to insulate
Any suitable location in coating 27.The shape of power supply line 2 can be circle, and electric leakage detection line 24 coats L line and N line and passes through
Drainage thread is connect (as shown in Fig. 3 A and 3C) with feedback signal line 25, and power supply line 2 is also possible to flat wire side by side, two electric leakage inspections
Survey line 24 is respectively coated by L line and N line (such as Fig. 3 B and 3D) or power supply line 2 can be other shapes that can be completed the process.It can
It can also only include other signal wires in power supply line 2 in other embodiments with understanding.Moreover, it will be understood that electric
It may include that detection line 24 is surveyed in more signal feedback lines 25 and Duo Gen electric leakage in source line 2.
Fig. 4 is the power supply line leakage current detection protective device architecture diagram according to the utility model embodiment.Power supply line is let out
Leakage current test protective device 10 includes: switch unit 103, is configured as between control signal 101 and output end 102
It is electrically connected；And residual current protective unit 104 comprising switch drive module 104a and detection of electrical leakage module 104b, wherein open
It closes drive module 104a and is configured to the leakage current signal according to detected by detection of electrical leakage module 104b come control switch unit 103
It is electrically connected to disconnect.Specifically, detection of electrical leakage module 104b further includes electric leakage detection line, be configured to detection L line and/or
It whether there is leakage current on N line；Signal feedback line, is configured to whether detection electric leakage detection line opens a way.Power supply line leakage
Current detection protection device further includes test switch TEST, is coupled to signal feedback line, when testing switch TEST closure, is opened
Drive module 104a is closed according to the signal on signal feedback line come control switch unit 103.
Fig. 5 A is the schematic diagram of the first embodiment according to the utility model.As shown in Figure 5A, power supply line leakage current is examined
Surveying protective device further includes open circuit detection unit 200, and open circuit detection unit 200 includes detection module 1 (D4, R6) and detection module
2 (D3, R5), one end A of electric leakage detection line 24 is connected with control circuit R2 in power supply line 2, other end B and signal feedback line
25 one end C is connected, and the other end D of signal feedback line 25 is connected with test switch TEST, therefore, tests switch TEST
Electric leakage detection line 24 is coupled to by signal feedback line 25.In addition, the end D of signal feedback line 25 is coupled to by detection module 1
L line, and N line is coupled to the end A of electric leakage detection line 24 via solenoid component, silicon controlled component and detection module 1, wherein
Solenoid component includes two groups of coils of the parallel coupled being wound on identical coil rack or bracket as shown in Figure 5A
N line is coupled in one end of SOL1 and SOL2, SOL1 and SOL2 parallel coupled, and the other end of parallel coupled is coupled to Group of Silicon Controlled Rectifier
On part, wherein silicon controlled component includes the controllable silicon SCR 1 and SCR2 of parallel coupled, and the anode of controllable silicon SCR 1 with can
The anode of control silicon SCR2 is connected and the anode of the two is coupled between solenoid component and diode D3, controllable silicon SCR 1
Control electrode is connected with one end of capacitor C1 with the control electrode of controllable silicon SCR 2, the cathode of controllable silicon SCR 1 with it is silicon-controlled
The cathode of SCR2 is connected with the other end of capacitor C1, and capacitor C1 is connected in parallel with resistance R3.Make in this way when one of them
When coil or a silicon-controlled damage lead to open circuit, solenoid component and silicon controlled component still be can work normally.
When pressing test switch TEST switch, simulated leakage electric current is opened from L line by resistance R4, test switch TEST
Pass, signal feedback line 25, shielding line 24 and resistance R2, R3, diode D2, solenoid component to N line form test loop.The mould
Quasi- leakage current will be so that resistance R3 both end voltage increases, and then driving silicon controlled component is connected, when silicon controlled component conducting, N
Line, solenoid component, silicon controlled component, diode D1 to L line form tripping circuit, will generate biggish electricity on solenoid component
Stream, forms sufficiently large magnetic field, so that RESET switch trip, and then cut off the power.If in test loop arbitrary route or
Element open circuit, when switch TEST is tested in pressure, product will not thread off.Therefore, user can test switch TEST by operation
It is whether intact come the shielding line 24 that detects power supply line.It should be understood that according to the difference of the application, it is any to can detecte test loop
Element whether work normally.
Usually switch TEST is opened, when electric leakage detection line 24 works normally (not opening a way), by carrying out to resistance R5, R6
Setting, A point are limited in compared with low potential, and silicon controlled component will not be triggered, and product will work normally.When in electric leakage detection line 24
Any position open circuit when, formed from N line, via solenoid component, diode D3, resistance R5, resistance R2, resistance R3, two poles
Pipe D1 and then the current path for reaching L line.The voltage at the both ends resistance R3 will rise, and then trigger silicon controlled component conducting.When can
When controlling silicon component, solenoid component, diode D1 forming circuit, solenoid component, which generates magnetic field, makes reset switch RESET thread off,
It cuts off the power.
Similarly, it when signal feedback line 25 is opened a way, can equally cut off the power.
It further include the resistance being connected in series compared to the first embodiment of Fig. 5 A in the second embodiment shown in Fig. 5 B
R21 and R31, open circuit detection unit 200 further includes detection module 3 (D31, R51), at this point, electric leakage detection line 24 is also via detection
Module 3 is coupled to N line, and the anode of controllable silicon SCR 1 is connected with diode D3, and the control electrode of controllable silicon SCR 1 is with capacitor C1's
One end is connected, and the cathode of controllable silicon SCR 1 is connected with the other end of capacitor C1, and capacitor C1 is connected in parallel with resistance R3；Controllably
The anode of silicon SCR2 is connected with diode D31, and the control electrode of controllable silicon SCR 2 is connected with one end of capacitor C2, silicon-controlled
The cathode of SCR2 is connected with the other end of capacitor C2, and capacitor C2 is connected in parallel with resistance R31.In the implementation, surveyed when pressing
When TEST switch is closed in runin, simulated leakage electric current passes through resistance R4, test switch TEST switch, signal feedback line 25, screen from L line
It covers line 24 and resistance R2, R3, diode D2, coil SOL1 to N line forms test loop, which will be so that resistance R3
Both end voltage increases, and then controllable silicon SCR 1 is driven to be connected, N line, coil SOL1, silicon-controlled when controllable silicon SCR 1 is connected
SCR1, diode D1 to L line form tripping circuit, will generate biggish electric current on solenoid component, and form sufficiently large magnetic
, so that RESET switch trip, and then cut off the power, and/or switched when press test switch TEST, simulated leakage electric current is from L
Line passes through resistance R4, test switch TEST switch, signal feedback line 25, shielding line 24 and resistance R21, R31, diode D2, line
It encloses SOL1 to N line and forms test loop, which will be so that resistance R31 both end voltage increases, and then driving is silicon-controlled
SCR2 conducting, when controllable silicon SCR 2 is connected, N line, coil SOL2, controllable silicon SCR 2, the formation of diode D1 to L line are threaded off back
Road will generate biggish electric current on solenoid component, and form sufficiently large magnetic field, so that RESET switch trip, and then cut off electricity
Source.
As first embodiment, usually switch TEST is opened.When any position open circuit in electric leakage detection line 24, shape
At from N line, the electric current of L line is reached in turn via coil SOL1, diode D3, resistance R5, resistance R2, resistance R3, diode D1
The voltage of access, the both ends resistance R3 will rise, and then trigger controllable silicon SCR 1 and be connected, and/or formed from N line, via coil
SOL2, diode D31, resistance R51, resistance R21, resistance R31, diode D1 and then the current path for reaching L line, resistance R31
The voltage at both ends will rise, and then trigger controllable silicon SCR 2 and be connected.When coil SOL1, controllable silicon SCR 1, diode D1 are formed back
When road and/or coil SOL2, controllable silicon SCR 2, diode D1 forming circuit, solenoid component, which generates magnetic field, makes reset switch
RESET tripping, cuts off the power.Similarly, it when signal feedback line 25 is opened a way, can equally cut off the power.
It should be understood that solenoid component can be by the more of the parallel coupled being wound on identical coil rack or bracket
Group coil composition or solenoid component can be by two groups of lines of the parallel coupled being wound on different coil rack or bracket
Circle (such as fourth embodiment shown in 3rd embodiment shown in Fig. 5 C and Fig. 5 D, in addition to remaining of coil winding mode Fig. 5 C
Part is identical with the first embodiment, and the rest part of Fig. 5 D is identical as second embodiment, and this will not be repeated here) or multiple groups coil group
At.Silicon controlled component can by parallel coupled multiple Group of Silicon Controlled Rectifier at.
Therefore, said power leakage current detection protective device can be realized to electric leakage detection line 24, signal feedback line
The automatic detection of the open circuits such as 25.Meanwhile using two groups of coils of coiling on identical coil rack or bracket or different
The mode of the solenoid component of two groups of coils of coiling is distinguished on coil rack or bracket, so that even if the damage of one of coil is made
At open circuit, another coil remains to work on, at the same using parallel coupled two Group of Silicon Controlled Rectifier at silicon controlled component, make
Even if one of them silicon-controlled damage, in addition silicon-controlled remain to work normally, increase the reliability of automatic detection function.
Fig. 6 A is the schematic diagram of the 5th embodiment according to the utility model, is detected with the power supply line leakage current in Fig. 5 A
Protective device is similar, and the power supply line leakage current detection protective device in Fig. 6 A includes open circuit detection unit 300, different
It is that feedback line is coupled to N line via detection module 1 (D4, R6), L line is directly coupled to control via detection module 2 (D3, R5)
The resistance R2 of circuit, and the anode of controllable silicon SCR 1 and SCR2 is not direct connect with D3.When electric leakage detection line 24 works normally
When, it is divided by resistance R5, R6, A point is limited in compared with low potential, and silicon controlled component will not be triggered, and product will work normally.
When electric leakage detection line 24 any position open circuit when, from L line, diode D3, resistance R5, resistance R2, resistance R3, diode D2,
Solenoid component forms current path to N line, and resistance R3 both end voltage will rise, and then trigger silicon controlled component conducting.At this point,
Solenoid component, which generates magnetic field, makes product thread off, and cuts off the power.Therefore, the power supply line leakage current in Fig. 6 A detects protective device
It can be realized the automatic detection opened a way to electric leakage detection line 24.In the sixth embodiment shown in Fig. 6 B, with the power supply in Fig. 6 A
It is similar that line leakage current detects protective device, the difference is that the anode of controllable silicon SCR 2 is connect with coil SOL2, not with coil
SOL1 is connected with the anode of controllable silicon SCR 1, and the control electrode of controllable silicon SCR 2 is connect with one end of capacitor C2, silicon-controlled
The cathode of SCR2 is connect with the other end of capacitor C2, and capacitor C2 is connected in parallel with resistance R3, when any bit of electric leakage detection line 24
When setting open circuit, electric current is formed from L line, diode D3, resistance R5, resistance R2, resistance R3, diode D2, coil SOL1 to N line
Access, resistance R3 both end voltage will rise, and then trigger controllable silicon SCR 1 and/or SCR2 conducting；When controllable silicon SCR 1 is connected,
N line, coil SOL1, controllable silicon SCR 1, diode D1 are formed into a loop so that solenoid component generates magnetic field and makes reset switch RESET
Tripping, cuts off the power, and/or when controllable silicon SCR 2 is connected, N line, coil SOL2, controllable silicon SCR 2, diode D1 are formed back
Road, which makes solenoid component generate magnetic field, makes reset switch RESET thread off, and cuts off the power.Therefore, the power supply line leakage in Fig. 6 A
Current detection protection device can be realized the automatic detection opened a way to electric leakage detection line 24.7th embodiment shown in Fig. 6 C with
Power supply line leakage current detection protective device in Fig. 6 A is similar to may be implemented identical function, the difference is that in solenoid
Two groups of coils are wound on respectively on two coil racks or bracket.8th embodiment shown in Fig. 6 D is let out with the power supply line in Fig. 6 B
Leakage current test protective device is similar to may be implemented identical function, the difference is that two groups of coils distinguish coiling in solenoid
On two coil racks or bracket.
Fig. 7 A is the schematic diagram of the 9th embodiment according to the utility model, similar with Fig. 5 A, and open circuit detection unit 400 is wrapped
Detection module 1 (D4, R6) and detection module 2 (D3, R5) are included, the difference is that there is no signal feedback line, detection module in Fig. 7 A
1 is positioned close to load-side, and the close load-side of shielding line 24 is coupled to L line via detection module 1, and test switch TEST is not
The resistance R2 being directly coupled to by electric leakage detection line in control circuit.In this way, A point is limited in when shielding line is not opened a way
Compared with low potential, silicon controlled component is made not to be triggered, product will work normally.When 24 any position of shielding line open circuit, in N line
Between L line, electric current is formed by by solenoid component, diode D3, resistance R5, resistance R2, resistance R3 and diode D1
Access triggers silicon controlled component conducting, so that silicon controlled component, diode D1, solenoid component are formed into a loop, solenoid
Component, which generates magnetic field, makes product thread off, and cuts off the power, to realize the automatic detection opened a way to electric leakage detection line 24.In addition, can
To detect whether other elements other than electric leakage detection line open a way by pressing TEST switch.The tenth is real shown in Fig. 7 B
Example is applied, similar with the power supply line leakage current detection protective device in Fig. 5 B, open circuit detection unit 400 includes detection module 1
(D4, R6), detection module 2 (D3, R5) and detection module 3 (D31, R51), the difference is that there is no signal feedback line in Fig. 7 B,
Detection module 2 is positioned close to load-side, and the close load-side of shielding line 24 is coupled to L line, test switch via detection module 1
TEST is directly coupled to the resistance R2 in control circuit without electric leakage detection line, and does not have resistance R21 and R31.Work as electric leakage
When 24 any position of detection line is opened a way, the automatic detection opened a way to electric leakage detection line 24 equally may be implemented.Furthermore, it is possible to pass through
TEST switch is pressed to detect whether other elements other than electric leakage detection line open a way.11st embodiment shown in Fig. 7 C
Protective device is similar that identical function may be implemented with the power supply line leakage current detection in Fig. 7 A, the difference is that solenoid
In two groups of coils be wound on two metal core wire ring frameworks or bracket respectively.In 12nd embodiment shown in Fig. 7 D and Fig. 7 B
Power supply line leakage current detection protective device it is similar identical function may be implemented, the difference is that two groups of lines in solenoid
Circle is wound on respectively on two metal core wire ring frameworks or bracket.
13rd embodiment shown in Fig. 8 A, it is similar with Fig. 6 A, the difference is that detecting mould without feedback signal line 25
Block 1 (D4, R6) is positioned close to load-side, and the close load-side of electric leakage detection line 24 is coupled to N line via detection module 1, surveys
Runin closes TEST and is directly coupled to the resistance R2 in control circuit without electric leakage detection line, in this way, when electric leakage detection line 24 is appointed
When one position is opened a way, the automatic detection opened a way to electric leakage detection line 24 equally may be implemented.Furthermore, it is possible to by pressing TEST
Switch is to detect whether other elements other than electric leakage detection line open a way.14th embodiment shown in Fig. 8 B, with Fig. 6 B
It is similar, the difference is that detection module 1 (D4, R6) is positioned close to load-side, electric leakage detection line without feedback signal line 25
24 close load-side is coupled to N line via detection module 1, tests switch TEST without electric leakage detection line and is directly coupled to control
Resistance R2 in circuit processed, in this way, equally may be implemented when 24 any position of electric leakage detection line open circuit to electric leakage detection line
The automatic detection of 24 open circuits.Furthermore, it is possible to detect other elements other than electric leakage detection line by pressing TEST switch
Whether open a way.The 15th embodiment is similar with Fig. 8 A shown in Fig. 8 C may be implemented identical function, the difference is that solenoid
In two groups of coils be wound on two metal core wire ring frameworks or bracket respectively.16th embodiment shown in Fig. 8 D and Fig. 8 B class
Identical function seemingly may be implemented, the difference is that two groups of coils are wound on two metal core wire ring frameworks respectively in solenoid
Or on bracket.
17th embodiment to the 20th embodiment shown in Fig. 9 A to Fig. 9 D, respectively and first shown in Fig. 5 A to Fig. 5 D
Embodiment is similar to fourth embodiment, the difference is that the end D of signal feedback line is only coupled via detection module 1 (D4, R6)
To L line, tests switch TEST and be directly coupled on the R2 of control circuit, there is no resistance R31 and R21 in Fig. 9 B and Fig. 9 D.Figure 10 A
To the 21st embodiment to the 24th embodiment shown in Figure 10 D, and leaked respectively with the power supply line in Fig. 6 A to Fig. 6 D
First embodiment shown in current detection protection device is similar to fourth embodiment, the difference is that the end D of signal feedback line is only
It is coupled to N line via detection module 1 (D4, R6), test switch TEST is directly coupled on the R2 of control circuit in the above
In embodiment, detection module 1 (D4, R6) is arranged far from load-side, is fed back by will test module 1 (D4, R6) via signal
Line 25 can be connect with any point on L line or N line, in this way, resistance R6, diode D4 can be placed in 1 shell of plug.
Although will also be appreciated that above-mentioned all embodiments in, use silicon controlled component, can be used metal-oxide-semiconductor,
Other suitable semiconductor elements such as triode substitute silicon-controlled formation semiconductor subassembly to realize identical function.
By implementing the technical solution of the utility model, it can not only realize and be realized by manual operation test switch TEST
Shielding line is detected, additionally it is possible to automatically shielding line open circuit be detected in product work, improve safety.Together
When, by the way that two groups of coils are wrapped on identical coil rack or bracket or two groups of coils are wrapped in different coil racks
Or on bracket, and by two groups of semiconductor subassemblies in parallel, increase the reliability of automatic detection function.In addition, this is practical new
Type also has many advantages, such as that circuit structure is simple, at low cost.
Therefore, although describing the utility model referring to specific example, wherein these specific examples are merely intended to
It is exemplary, rather than the utility model is limited, but is obvious to those skilled in the art
It is that on the basis of not departing from the spirit and scope of the utility model, the disclosed embodiments can be changed, be increased
Add or deletes.
Claims (13)
1. a kind of power supply line leakage current detects protective device characterized by comprising
Switch unit is configured as electrically connected between control signal and output end；
Residual current protective unit comprising switch drive module and detection of electrical leakage module, wherein
The detection of electrical leakage module further includes electric leakage detection line, is at least configured to the first supply lines of detection and/or the second confession
It whether there is leakage current on electric wire；And
The switch drive module further includes solenoid component and semiconductor subassembly, and the solenoid component is coupled in described first
Between supply lines and the semiconductor subassembly, the solenoid component includes at least two groups coil of parallel coupled, and described
Semiconductor subassembly includes at least two semiconductor elements of parallel coupled；
Wherein, when in at least two groups coil at least one group coil do not open a way and at least two semiconductor element
When at least one semiconductor element is not opened a way, electric leakage that the switch drive module is detected according to the detection of electrical leakage module
It is described electrically connected to disconnect to control the switch unit to flow signal.
2. power supply line leakage current as described in claim 1 detects protective device, which is characterized in that further include:
Open circuit detection unit comprising first detection module and the second detection module, wherein the electric leakage detection line is via described
First detection module is coupled to second supply lines, wherein
The switch drive module is additionally configured to open a way in response to the electric leakage detection line to control the switch unit with disconnected
It opens described electrically connected.
3. power supply line leakage current as claimed in claim 2 detects protective device, which is characterized in that the solenoid component packet
The first group of coil and second group of coil of parallel coupled are included, and first group of coil and second group of coil are wrapped in phase
On same or different coil rack or bracket.
4. power supply line leakage current as claimed in claim 3 detects protective device, which is characterized in that the semiconductor subassembly packet
The first semiconductor element and the second semiconductor element of parallel coupled are included,
The anode of first semiconductor element is connected with the anode of second semiconductor element, first semiconductor element
The control electrode of part is connected with the first end of first capacitor with the control electrode of second semiconductor, first semiconductor
Cathode is connected with the second end of the first capacitor with the cathode of second semiconductor, and the first capacitor is driven with first
Dynamic resistor coupled in parallel connection；Or
The open circuit detection unit further includes third detection module, and the electric leakage detection line is also via the third detection module coupling
First supply lines is closed, the anode of first semiconductor element is connected with first detection module, and described the first half lead
The cathode of volume elements part is connected with the first end of first capacitor, and the of the control electrode of first semiconductor element and first capacitor
Two ends are connected, the first capacitor with first driving resistor coupled in parallel connect, the anode of second semiconductor element with it is described
Third detection module is connected, and the control electrode of second semiconductor element is connected with the first end of the second capacitor, and the second half
The cathode of conductor element is connected with the second end of second capacitor, and second capacitor and the second driving resistor coupled in parallel connect
It connects.
5. power supply line leakage current as claimed in claim 4 detects protective device, which is characterized in that the first detection module
First resistor and first diode including series connection, second detection module include the second resistance being connected in series and the
Two diodes.
6. power supply line leakage current as claimed in claim 5 detects protective device, which is characterized in that the third detection module
3rd resistor and third diode including series connection.
7. power supply line leakage current as claimed in claim 2 detects protective device, which is characterized in that further include signal feedback
Line, and the electric leakage detection line is coupled to the first detection module via the signal feedback line,
Wherein, when the signal feedback line is opened a way, the switch drive module controls the switch unit to disconnect the electricity
Power connection.
8. power supply line leakage current as claimed in claim 7 detects protective device, which is characterized in that it further include test cell,
It includes test switch, and test switch is directly coupled to the semiconductor subassembly or via the signal feedback line
It is coupled to the semiconductor subassembly,
Wherein, when the test closes the switch, the switch drive module controls the switch unit to disconnect the electric power
Connection.
9. power supply line leakage current as claimed in claim 2 detects protective device, which is characterized in that it further include test cell,
It includes test switch, and test switch is directly coupled to the semiconductor subassembly,
Wherein, when the test closes the switch, the switch drive module controls the switch unit to disconnect the electric power
Connection.
10. power supply line leakage current as claimed in claim 2 detects protective device, which is characterized in that further include:
Shell, for accommodating at least one in the switch unit, the residual current protective unit and the open circuit detection unit
It is a.
11. power supply line leakage current as described in claim 1 detects protective device, which is characterized in that the semiconductor element
Including any one of silicon-controlled, metal-oxide-semiconductor or triode.
12. a kind of electrical appliance characterized by comprising the power supply line leakage current as described in any one of claims 1 to 10
Detect protective device.
13. a kind of power supply line, which is characterized in that include at least:
First supply lines, the second supply lines, ground wire, electric leakage detection line, at least one signal feedback line and the outer quilt of insulation,
Wherein, at least one signal feedback line is the conductor with independent insulating layer, and the electric leakage detection line at least coats
First supply lines and second supply lines, and the electric leakage detection line and at least one signal feedback line are by institute
It states and is wrapped by outside insulation.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930686.4U CN209016690U (en) | 2018-11-22 | 2018-11-22 | Power supply line, power supply line leakage current detection protective device and electrical appliance |
| US16/212,505 US10840698B2 (en) | 2017-09-22 | 2018-12-06 | Leakage current detection and protection device for power cord |
| 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 |
|---|---|---|---|
| CN201821930686.4U CN209016690U (en) | 2018-11-22 | 2018-11-22 | Power supply line, power supply line leakage current detection protective device and electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209016690U true CN209016690U (en) | 2019-06-21 |
Family
ID=66842891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821930686.4U Active CN209016690U (en) | 2017-09-22 | 2018-11-22 | Power supply line, power supply line leakage current detection protective device and electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209016690U (en) |
-
2018
- 2018-11-22 CN CN201821930686.4U patent/CN209016690U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102315621B (en) | Electric wire connection protecting device with self-checking function | |
| CN105896465A (en) | Three-pole leakage protector and working method thereof | |
| AU2011200306A1 (en) | Power supply monitoring system | |
| CN103166137A (en) | Multifunctional and combined type intelligent insulating rod | |
| CN105337252B (en) | Earth leakage protective device with self-checking function | |
| CN209086378U (en) | A kind of device for detection cable insulation ag(e)ing state | |
| CN102893477A (en) | Residual current device | |
| CN114002561A (en) | Detection device and detection method for transformer bus copper bar insulating sleeve | |
| CN209016690U (en) | Power supply line, power supply line leakage current detection protective device and electrical appliance | |
| CN109244700A (en) | A kind of anti-error hanging earthing conductor device and control method | |
| CN207200254U (en) | Power line leakage current detects protection device and electrical appliance | |
| CN207689643U (en) | Winding temperature detection circuit, temperature measurement control system and temperature monitor | |
| CN104577976A (en) | Arc fault protection device and control method thereof | |
| CN206671494U (en) | A kind of earth leakage protective device comprehensive test device | |
| CN205826792U (en) | Intelligent anti-line with ground closes a floodgate and detects device | |
| AU2003200300B2 (en) | Diagnostic wiring verification tester | |
| CN103914017A (en) | Indoor electric appliance safety electricity utilization monitoring device and method | |
| KR101527366B1 (en) | Arc detection circuit by contact failure | |
| CN206432694U (en) | Earth leakage protective device | |
| CN207300297U (en) | A kind of weak current engineering intelligent detection equipment | |
| KR20130008844A (en) | Dc leakage current circuit braker | |
| CN214252508U (en) | Electric leakage test detection device of circuit breaker | |
| CN109546613A (en) | Power supply line leakage current detects protective device | |
| CN201845038U (en) | Electrical leakage tester for three-phase three-wire IT (information technology) system | |
| CN209071636U (en) | A kind of anti-error hanging earthing conductor device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |