CN109755921A - Ground-fault interrupter - Google Patents
Ground-fault interrupter Download PDFInfo
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- CN109755921A CN109755921A CN201711089746.4A CN201711089746A CN109755921A CN 109755921 A CN109755921 A CN 109755921A CN 201711089746 A CN201711089746 A CN 201711089746A CN 109755921 A CN109755921 A CN 109755921A
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Abstract
The invention discloses a kind of ground-fault interrupters comprising switch module, Earth Fault Detection module, selftest module and tripping module.Wherein, the switch module is coupled between input terminal and output end, electrically connected between the input terminal and the output end to control；The Earth Fault Detection module, which detects the output end, whether there is leakage current signal；The selftest module is couple to the Earth Fault Detection module and periodically generates the self-test pulse signal for simulating the leakage current signal；And the tripping module couples are to the Earth Fault Detection module and the switch module, to control the switch module movement.The present invention is that ground-fault interrupter devises at least two tripping driving parts, it avoids tripping module failure therein when working long hours under the high temperature conditions and ground-fault interrupter is caused to stop working, and then greatly improve the safety of ground-fault interrupter.
Description
Technical field
The present invention relates to domestic circuit field more particularly to a kind of ground-fault interrupters.
Background technique
With becoming increasingly popular for household electrical appliance, people are increasingly paid attention to using safe household electrical appliance.Though currently, people
Ground-fault interrupter so is installed in power grid output end or in the input terminal of some household electrical appliance, improves the use of household electrical appliance
Electric safety.But in use, because the factors such as using for a long time, though people to ground-fault interrupter carried out in use from
The operation such as inspection, due to the defect of ground-fault interrupter internal structure in the prior art, although ground-fault interrupter is caused to be examined
Electrical leakage problems are measured, but power supply cannot be disconnected in time due to the internal drive failure of ground-fault interrupter, ground fault
Breaker still has a possibility that earth leakage protective is lost in use process, occurs so as to cause dangerous situation.And it is existing
The ground-fault interrupter with self-checking function in technology can only prompt the user with ground connection event by way of indicator light, sound
Hindering breaker, there are failures, and there are failures for that can not identify ground-fault interrupter by modes such as indicator light, sound
For personnel, it is be easy to cause personal injury using above-mentioned ground-fault interrupter, there are security risks.
Therefore, need it is a kind of facilitate installation, economic benefit significantly and have self-checking function, multiple protection functions ground connection therefore
Hinder breaker.
Summary of the invention
In view of the above-mentioned problems, the invention proposes a kind of ground-fault interrupter with multiple protection functions, Jin Erti
Rise Product Safety, reliability.
One aspect of the present invention proposes a kind of ground-fault interrupter comprising: switch module, Earth Fault Detection mould
Block, selftest module and tripping module.The switch module is coupled between input terminal and output end, and the switch module is used for
It controls electrically connected between the input terminal and the output end；The Earth Fault Detection module detects the output end
It is no that there are leakage current signals；The selftest module is couple to the Earth Fault Detection module and periodically generates for mould
Intend the self-test pulse signal of the leakage current signal；The tripping module couples are to the Earth Fault Detection module and described
Switch module, wherein the tripping module includes: at least two tripping driving parts, according to the Earth Fault Detection module
The leakage current signal detected is electrically connected to control the switch module disconnection.
In one embodiment, at least two trippings driving part is connected in parallel, each tripping driving portion
Part includes the semiconductor element for being couple to the Earth Fault Detection module and the trip line with semiconductor element coupling
Circle；When detecting the leakage current signal, at least one described semiconductor element is connected in the Earth Fault Detection module
The corresponding tripping coil movement of control, it is electrically connected to drive the switch module to disconnect.
In one embodiment, the tripping module includes: trip gear and at least two semiconductor elements；It is described de-
Buckle device is equipped at least two tripping coils；Each semiconductor element is respectively coupled at least two trip line
Circle, and each semiconductor element is additionally coupled to the Earth Fault Detection module, so that each semiconductor element
The corresponding tripping driving part is formed with each tripping coil, in which: described to connect when detecting leakage current signal
It is electrically connected to drive the switch module to disconnect that at least one described semiconductor element is connected in earth fault detection module.
In one embodiment, the semiconductor element includes any in the elements such as silicon-controlled, metal-oxide-semiconductor, triode
It is a kind of.
In one embodiment, the selftest module includes the period timing circuit and self-test pulse signal being mutually coupled
Circuit, the period timing circuit are used to control the interval that the self-test pulse signal circuit generates self-test pulse signal.
In one embodiment, the self-test pulse signal circuit includes switching tube, point with switching tube coupling
A reference source is flowed, the period timing circuit is couple to the shunt reference source to control the switching tube and generate the self-test pulse
Signal.
In one embodiment, the self-test pulse signal circuit includes the ratio of switching tube and switching tube coupling
Compared with device, the period timing circuit is couple to the comparator to control the switching tube and generate the self-test pulse signal.
In one embodiment, the selftest module further includes power module, and the power module is used for for described in certainly
Examine pulse signal circuit and/or period timing circuit power supply；When the power module is only the self-test pulse signal electricity
When road powers, the period timing circuit is couple to detection of electrical leakage ring by period timing pulsafeeder to take electricity.
In one embodiment, the Earth Fault Detection module includes: detection of electrical leakage ring, detection of electrical leakage unit；Institute
Phase line and the neutral conductor of the detection of electrical leakage ring for detecting the output end are stated with the presence or absence of leakage current signal；The detection of electrical leakage list
Member is respectively coupled to the detection of electrical leakage ring, the tripping module, when the detection of electrical leakage unit is by detecting the electric leakage inspection
When surveying ring and generating the leakage current signal, it is electrically connected to drive the switch module to disconnect to control the tripping module.
The present invention increases in ground-fault interrupter compared with the prior art including at least two tripping driving parts
Tripping module, selftest module, can not only ground-fault interrupter work in periodically automatically detection earth leakage protective function
Can, user be supplied to indicate accordingly, additionally it is possible to during ground-fault interrupter work in the presence of detecting failure,
When a tripping driving part in module of threading off breaks down cisco unity malfunction, another tripping driving part can
It disconnects in time electrically connected between input terminal and output end, it is ensured that the normal work of ground-fault interrupter, thus greatly
Improve safety, the reliability of circuit.
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 shows electrical block diagram according to a first embodiment of the present invention；
Fig. 2 shows electrical block diagrams according to a second embodiment of the present invention；
Fig. 3 shows electrical block diagram according to a third embodiment of the present invention；
Fig. 4 shows electrical block diagram according to a fourth embodiment of the present invention；
Fig. 5 shows electrical block diagram according to a fifth embodiment of the present invention；
Fig. 6 shows electrical block diagram according to a sixth embodiment of the present invention.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of present invention a part.Institute
Attached attached drawing, which has been illustrated by way of example, can be realized specific embodiment.Exemplary embodiment not purport
In exhaustive all embodiments according to the present invention.It is appreciated that without departing from the scope of the present invention, can use it
His embodiment, can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and
The scope of the present invention is defined by the claims appended hereto.
The present invention is directed to propose a kind of ground-fault interrupter, which can be realized progress in use
When any one tripping driving part of self-test, the tripping module in ground-fault interrupter inside breaks down, ground connection event
Barrier breaker can still work normally.Based on the design, ground-fault interrupter of the invention includes: switch module, ground connection
Fault detection module, selftest module and tripping module, by Earth Fault Detection module detection output with the presence or absence of ground connection
Failure；Detect whether Earth Fault Detection module works normally by selftest module in use；Work as Earth Fault Detection
It is electrically connected to cut off the power that module detects that module drive switch module of threading off when ground fault disconnects；When in tripping module
Any one tripping driving part when breaking down, another or multiple tripping driving parts can still work normally control
Switch module movement processed.
Fig. 1 shows the electrical block diagram of ground-fault interrupter according to a first embodiment of the present invention.Such as Fig. 1 institute
Show, ground-fault interrupter in the first embodiment includes input terminal LINE and output end LOAD, for control signal
Electrically connected switch module 4, selftest module 1, tripping module 2, Earth Fault Detection mould between LINE and output end LOAD
Block 3.Wherein, Earth Fault Detection module 3 whether there is leakage current signal, tool for detection input LINE and output end LOAD
Body detection output LOAD phase line (L) and the neutral conductor (N) whether there is leakage current signal.Selftest module 1 connects for detecting
Whether earth fault detection module 3 works normally.When Earth Fault Detection module 3 detects leakage current signal, control tripping mould
2 driving switch module 4 of block disconnects electrically connected to cut off the power, protection of the realization to circuit.
The first embodiment of the present invention according to figure 1, the specific working principle is as follows:
In the present embodiment, Earth Fault Detection module 3 includes the detection of electrical leakage ring across phase line (L) and the neutral conductor (N)
ZCT1 and to detection of electrical leakage ring ZCT1 coupling detection of electrical leakage unit (it include detection of electrical leakage chip U1 and its it is related couple
Electronic component).When the phase line (L) and the neutral conductor (N) for passing through detection of electrical leakage ring ZCT1 are there are when current imbalance, i.e., presence is leaked
When current signal, corresponding voltage signal will be generated on detection of electrical leakage ring ZCT1, then detection of electrical leakage chip U1 is by detecting leakage
Corresponding voltage change is generated on electro-detection ring ZCT1, is disconnected with control tripping 2 driving switch module 4 of module.
In the present embodiment, tripping module 2 includes the tripping driving part 21,22 being connected in parallel, each tripping driving part
Including be couple to Earth Fault Detection module 3, selftest module 1 semiconductor element (silicon-controlled Q1 or Q4) and with it is silicon-controlled
The tripping coil (SOL1 or SOL2) of (Q1 or Q4) coupling.It is generated on detection of electrical leakage ring ZCT1 when detection of electrical leakage chip U1 is detected
When corresponding voltage change reaches pre-set value, silicon-controlled Q1, Q4 can be made to be connected.When Q1, Q4 conducting, tripping coil
SOL1, SOL2 will generate biggish curent change, and then disconnect switch module 4.In actual use, when silicon-controlled Q1 or tripping
Coil SOL1 breaks down (for example, silicon-controlled Q1 cathode and/or anode open circuit, tripping coil SOL1 open circuit etc.) and silicon-controlled
When Q4, tripping coil SOL2 are still worked normally, detects in detection of electrical leakage chip U1 and generated accordingly on detection of electrical leakage ring ZCT1
Voltage change when, silicon-controlled Q4, tripping coil SOL2 regular event, switch module 4 is disconnected, so that ground-fault interrupter
It disconnects electrically connected；Vice versa.
In the present embodiment, selftest module 1 is for periodically checking 3 function of ground fault detection module.From
Examining module 1 includes power circuit, period timing circuit and the self-test pulse signal circuit for simulating leakage current signal.Referring to Fig. 1,
Power circuit includes resistance R5, voltage-stabiliser tube ZD1 and capacitor C3；Period timing circuit includes the resistance R9 being connected in series and timing
Element (for example, capacitor C4) is used to generate the interval of self-test pulse signal；Self-test pulse signal circuit includes switching tube (triode
Q2), comparator U2, diode D2, capacitor C5, resistance R10 and the emitter, base stage and the current collection that are respectively coupled to triode Q2
The electronic components such as resistance R11, R13 of pole.After ground-fault interrupter work, selftest module 1 was to detection of electrical leakage ring ZCT1 weeks
Apply to phase property the simulation leakage current signal for reaching estimated definite value.
Specifically, resistance R5, voltage-stabiliser tube ZD1 and capacitor C3 for comparator U2 provide working power (comparator U2's
Pin 5), resistance R7, R8 are divided from working power provides reference voltage (pin 3 of comparator U2) for comparator U2, leads to
Cross resistance R9 from working power to capacitor C4 charge generate self-test pulse signal interval be input to comparator U2 (comparator U2's
Pin 1), when voltage rises to reference potential on capacitor C4, comparator U2 (pin 4 of comparator U2) output signal, and then drive
Dynamic triode Q2 conducting, then self-test pulse signal is generated to detection of electrical leakage ring ZCT1 by resistance R13.
When selftest module 1 detects that failure has occurred in Earth Fault Detection module 3, i.e. detection of electrical leakage chip U1 can not make can
Silicon Q1 conducting is controlled, then capacitor C4 does not have discharge circuit, will persistently export so as to cause selftest module 1 (pin 4 of comparator U2)
High level is then charged by resistance R10 to capacitor C5, and when current potential reaches setting value, diode D2 is connected, then silicon-controlled Q1
And/or silicon-controlled Q4 conducting, then act tripping coil SOL1 and/or tripping coil SOL2, and then control switch module 4 is disconnected
It opens electrically connected.In actual use, when silicon-controlled Q1 or tripping coil SOL1 break down (for example, silicon-controlled Q1 cathode and/
Or anode open circuit, tripping coil SOL1 open circuit etc.) and silicon-controlled Q4 or tripping coil SOL2 when still working normally, in comparator
When U2 detects that failure has occurred in Earth Fault Detection module 3, silicon-controlled Q4 conducting can be controlled, will be produced on tripping coil SOL2
Raw biggish curent change, is disconnected switch module 4；Vice versa.
In conclusion the present embodiment realizes the period under ground-fault interrupter normal operating conditions by selftest module 1
Property automatic detection creepage protection function it is whether normal, when Earth Fault Detection module 3 breaks down, pass through control tripping mould
Block driving switch module disconnects output power supply.And/or when Earth Fault Detection module 3 detects the presence of leakage current signal, lead to
It crosses control tripping module drive switch module and disconnects output power supply.And when any one of tripping module tripping driving part
When (21 or 22) break down, the normal work of another tripping driving part (22 or 21) is not influenced, so that ground fault
Breaker can disconnect output power supply.
The second embodiment of the present invention according to Fig.2, the specific working principle is as follows:
Compared to Fig. 1, the structure of the tripping module 2 in Fig. 2 is changed: two being respectively set on trip gear F
Coil forms tripping coil SOL1, tripping coil SOL2；Wherein the anode of silicon-controlled Q1 respectively with two tripping coil couplings
It connects, while the anode of silicon-controlled Q4 is also coupled with two tripping coils respectively；And the control electrode of silicon-controlled Q1, silicon-controlled Q4's
Control electrode is coupled with Earth Fault Detection module 3, selftest module 1；That is, silicon-controlled Q1 and tripping coil SOL1, silicon-controlled Q1
It is respectively formed with tripping coil SOL2, silicon-controlled Q4 with tripping coil SOL1 and silicon-controlled Q4 with tripping coil SOL2 corresponding
Tripping driving part.Therefore, when Earth Fault Detection module 3 detects that leakage current signal and/or selftest module 1 detect ground connection
When fault detection module 3 breaks down, can control silicon-controlled Q1 and/or silicon-controlled Q4 control tripping coil SOL1 and/or
Tripping coil SOL2 driving switch module 4 disconnect it is electrically connected, to cut off the power.In addition, working as silicon-controlled Q1 or silicon-controlled Q4
When breaking down, another silicon-controlled Q4 or silicon-controlled Q1 normal control tripping coil SOL1 and/or tripping coil are not influenced
SOL2 driving switch module 4 disconnects electrically connected；Or when tripping coil SOL1 or tripping coil SOL2 breaks down, not
It influences silicon-controlled Q1 and/or silicon-controlled Q4 control tripping coil SOL2 or tripping coil SOL1 normal driving switch module 4 disconnects
It is electrically connected；Or when one in silicon-controlled Q1 and silicon-controlled Q4 breaks down, and tripping coil SOL2 and tripping coil
One in SOL1 when breaking down, another silicon-controlled and tripping coil worked normally can be with work in combination to which driving be opened
It is electrically connected to close RESET disconnection.
In conclusion there is more flexible, relatively reliable tripping module compared to the first embodiment in the present embodiment,
When one in module of threading off is silicon-controlled and/or a tripping coil breaks down, the normal use of tripping module is not influenced,
And then substantially increase availability, flexibility, reliability and the safety of ground-fault interrupter disclosed by the invention.
Also, the selftest module 1 in Fig. 1, Fig. 2 disclosed embodiment can be deposited detecting Earth Fault Detection module 3
In failure, control tripping 2 driving switch module 4 of module is disconnected electrically connected, convenient for that can not identify ground fault by indicator light
Breaker uses the electric appliance with the ground-fault interrupter there are the personnel safety of failure.
Fig. 3 shows the circuit theory schematic diagram of the ground-fault interrupter of third embodiment according to the present invention.
As shown in figure 3, selftest module 1 includes power circuit, period timing circuit and the self-test for simulating leakage current signal
Pulse signal circuit.Referring to Fig. 3, power circuit includes resistance R5, voltage-stabiliser tube ZD1 and capacitor C3；Self-test pulse signal circuit
Including switching tube (triode Q2), shunt reference source U2, resistance R12 and capacitor C5.It is different from Fig. 1: period timing circuit packet
The resistance R8 and timing element (for example, capacitor C4) that include series connection are used to generate the interval of self-test pulse signal, and resistance
R8 connects with resistance R7, and voltage-stabiliser tube ZD2 is connected in parallel on the node between resistance R7, R8 and between ground potential, to shunt base
The end the REF voltage of quasi- source U2 is limited to less than the pressure stabilizing value equal to voltage-stabiliser tube ZD2.Wherein, power circuit is triode Q2, divides
It flows a reference source U2 and working power is provided；Resistance R7, voltage-stabiliser tube ZD2 form period timing pulsafeeder, by being couple to electric leakage inspection
Surveying ring ZCT1 and taking electricity is that period timing circuit is powered.
1 working principle of selftest module in the 3rd embodiment is as follows: when Earth Fault Detection module 3 works normally,
After ground-fault interrupter resets, the voltage on capacitor C4 is zero, therefore the end REF of shunt reference source U2 is less than reference voltage
2.5V, then the triode in shunt reference source U2 is in an off state, and shunt reference source U2 can not be connected.Period timing pulsation electricity
Source by resistance R8 to capacitor C4 charge, when the voltage on capacitor C4 fills up to 2.5V or more, in shunt reference source U2 three
Pole pipe conducting generates self-test pulse letter so that base stage has the triode Q2 of positive bias-voltage to be connected on detection of electrical leakage ring ZCT1
Number, after detection of electrical leakage chip U1 detects the self-test pulse signal, silicon-controlled Q3 will be driven to be connected, then capacitor C4 can be by can
Control silicon Q3 discharges.Specifically, when self-test output of pulse signal, the silicon-controlled Q1, Q4 of detection of electrical leakage chip U1 output driving,
The signal of Q3 drives silicon-controlled Q3 to be connected by resistance R12, capacitor C5, so that capacitor C4 discharges, starts next self-test
Period.While driving silicon-controlled Q3, close self-test pulse signal, capacitor C1, C6 be delayed so that be not turned on silicon-controlled Q1,
Q4, then tripping coil SOL1, SOL2 does not form current loop, therefore switch module 4 is still closed.If detecting lasting generation
Leak electricity letter flow number, and silicon-controlled Q3 conducting is not so that self-test pulse signal circuit generates self-test pulse signal, then silicon-controlled Q1, Q4 are led
It is logical so that tripping coil SOL1, SOL2 form current loop, thus driving switch module 4 disconnect it is electrically connected.
When Earth Fault Detection module 3 breaks down, when self-test output of pulse signal, detection of electrical leakage chip U1 can not
The signal of output driving silicon-controlled Q1, Q4, Q3 so that capacitor C4 can not be driven by resistance R12, capacitor C5 it is silicon-controlled
Q3 is connected and discharges.Since the voltage on capacitor C4 maintains high potential, then shunt reference source U2 is constantly on, so that luminous two
Pole pipe LED2 is always on, and thus informing user's ground-fault interrupter, there are failures.It should be understood that in this embodiment, if connecing
Earth fault detection module 3 is working properly, and Light-emitting diode LED 2 can flash.
Similarly, in Fig. 3 if without Light-emitting diode LED 2, one silicon-controlled (Q1 or Q4) in tripping module
And/or a tripping coil (SOL1 or SOL2) is when breaking down, the normal use for the module that do not influence to thread off.
Fig. 4 shows the schematic illustration of the ground-fault interrupter of fourth embodiment according to the present invention.In Fig. 4 from
The working principle and Fig. 3 of inspection module 1 are identical, the working principle of tripping module 2 is identical as Fig. 2, and details are not described herein.
Fig. 5 shows the circuit theory schematic diagram of the ground-fault interrupter of fifth embodiment according to the present invention.
As shown in figure 5, the difference with Fig. 1 is: Earth Fault Detection module 3 includes detection of electrical leakage ring ZCT1, the neutral conductor
Detect ring ZCT2, detection of electrical leakage module (it includes the associated electronic components such as detection of electrical leakage chip U1, resistance R3, R2) and rectification
Bridge D1-D4.Wherein, detection of electrical leakage ring ZCT1 is for detecting phase line (L) and the neutral conductor (N) with the presence or absence of ground fault, the neutral conductor
Detection ring ZCT2 is for detecting the neutral conductor and ground wire with the presence or absence of ground fault.Rectifier bridge D1-D4 is respectively coupled to phase line in
Property line, and detection of electrical leakage chip U1 (pin 6 of detection of electrical leakage chip U1) is couple to by resistance R1, to be detection of electrical leakage core
Piece U1 provides working power.Detection of electrical leakage chip U1 is coupled with detection of electrical leakage ring ZCT1, neutral conductor detection ring ZCT2 respectively, with inspection
Survey two kinds of ground faults (by the output detection of pin 5 signal of detection of electrical leakage chip U1).
The working principle of the selftest module 1 of Fig. 5 and the working principle of selftest module 1 of Fig. 1 are identical, and the tripping of Fig. 5
The working principle of module 2 is identical as the working principle of tripping module 2 of Fig. 1, so not repeating the self-test in the embodiment herein
The working principle of module 1, module 2 of threading off.
Fig. 6 shows the circuit theory schematic diagram of the ground-fault interrupter of sixth embodiment according to the present invention.At this
In sixth embodiment, the working principle of Earth Fault Detection module 3 is identical as the working principle of Fig. 5 Earth Fault Detection module 3,
The working principle of selftest module 1 is identical as the working principle of selftest module 1 of Fig. 1, the working principle of tripping module 2 and Fig. 2
The working principle for module 2 of threading off is identical, and compared to Fig. 1-Fig. 5 the disclosed embodiments, sixth embodiment can either detect phase line
It whether there is ground fault with the neutral conductor, the neutral conductor and ground wire, it also can be in the tripping of any one or more of tripping module 2
The tripping driving part for not influencing to work normally when driving part breaks down works, therefore sixth embodiment has more
High reliability, safety.
To sum up, ground-fault interrupter disclosed by the invention has self-checking function, while in ground-fault interrupter
When breaking down when long-term work due to its some internal or certain tripping driving parts, ground fault open circuit is not still influenced
The normal use of device, while can be logical by modes such as indicator light, auto-cutouts during ground-fault interrupter self-test
Know that user cannot be used continuously the ground-fault interrupter, is used convenient for various crowds, particularly convenient for can not be known by indicator light
Other ground-fault interrupter there are the personnel safety of failure, reliably uses, and final realize can effectively realize to electric appliance
Safe handling.
Therefore, although describing the present invention referring to specific example, wherein these specific examples are merely intended to be to show
Example property, rather than limit the invention, but it will be apparent to those skilled in the art that not taking off
On the basis of spirit and scope of the invention, the disclosed embodiments can be changed, increased or deleted.
Claims (9)
1. a kind of ground-fault interrupter characterized by comprising
Switch module is coupled between input terminal and output end, and the switch module is for controlling the input terminal and described
It is electrically connected between output end；
Earth Fault Detection module, detecting the output end whether there is leakage current signal；
Selftest module is couple to the Earth Fault Detection module and periodically generates for simulating the leakage current letter
Number self-test pulse signal；And
Tripping module, is couple to the Earth Fault Detection module and the switch module, wherein the tripping module includes:
At least two tripping driving parts, are controlled according to the leakage current signal that the Earth Fault Detection module detects
It is electrically connected to make the switch module disconnection.
2. ground-fault interrupter as described in claim 1, which is characterized in that at least two trippings driving part is in parallel
Connection, it is each it is described tripping driving part include be couple to the Earth Fault Detection module semiconductor element and with institute
State the tripping coil of semiconductor element coupling；When detecting the leakage current signal, the Earth Fault Detection module conducting
At least one described semiconductor element acts to control the corresponding tripping coil, to drive the switch module to disconnect electric power
Connection.
3. ground-fault interrupter as described in claim 1, which is characterized in that the tripping module includes:
Trip gear which is provided at least two tripping coils；
At least two semiconductor elements, each semiconductor element are respectively coupled at least two tripping coil, and
Each semiconductor element is additionally coupled to the Earth Fault Detection module, so that each semiconductor element and each institute
It states tripping coil and forms the corresponding tripping driving part, in which:
When detecting leakage current signal, at least one described semiconductor element is connected to drive in the Earth Fault Detection module
The switch module disconnects electrically connected.
4. ground-fault interrupter as claimed in claim 2 or claim 3, which is characterized in that the semiconductor element include it is silicon-controlled,
Any one of metal-oxide-semiconductor, triode.
5. ground-fault interrupter as described in claim 1, which is characterized in that the selftest module includes the week being mutually coupled
Phase timing circuit and self-test pulse signal circuit, the period timing circuit are generated for controlling the self-test pulse signal circuit
The interval of self-test pulse signal.
6. ground-fault interrupter as claimed in claim 5, which is characterized in that the self-test pulse signal circuit includes switch
Pipe, the shunt reference source with switching tube coupling, the period timing circuit are couple to the shunt reference source to control
It states switching tube and generates the self-test pulse signal.
7. ground-fault interrupter as claimed in claim 5, which is characterized in that the self-test pulse signal circuit includes switch
Pipe, the comparator with switching tube coupling, the period timing circuit are couple to the comparator to control the switching tube
Generate the self-test pulse signal.
8. ground-fault interrupter as claimed in claim 5, which is characterized in that the selftest module further includes power module,
The power module is used to power for the self-test pulse signal circuit and/or the period timing circuit；When the power supply mould
When block is only self-test pulse signal circuit power supply, the period timing circuit is couple to leakage by period timing pulsafeeder
Electro-detection ring is to take electricity.
9. ground-fault interrupter as described in claim 1, which is characterized in that the Earth Fault Detection module includes:
Detection of electrical leakage ring, the phase line for being used to detect the output end and the neutral conductor are with the presence or absence of leakage current signal；
Detection of electrical leakage unit is respectively coupled to the detection of electrical leakage ring, the tripping module, when the detection of electrical leakage unit is logical
It crosses when detecting the detection of electrical leakage ring and generating the leakage current signal, controls the tripping module to drive the switch module
It disconnects electrically connected.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089746.4A CN109755921A (en) | 2017-11-08 | 2017-11-08 | Ground-fault interrupter |
| US15/819,353 US10615588B2 (en) | 2016-07-13 | 2017-11-21 | Ground fault circuit interrupter |
| US15/878,242 US10571526B2 (en) | 2016-07-13 | 2018-01-23 | Ground fault circuit interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089746.4A CN109755921A (en) | 2017-11-08 | 2017-11-08 | Ground-fault interrupter |
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| Publication Number | Publication Date |
|---|---|
| CN109755921A true CN109755921A (en) | 2019-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711089746.4A Pending CN109755921A (en) | 2016-07-13 | 2017-11-08 | Ground-fault interrupter |
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| CN (1) | CN109755921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614059A (en) * | 2020-07-09 | 2020-09-01 | 上海复旦微电子集团股份有限公司 | Ground fault protection system |
| CN112072613A (en) * | 2020-09-15 | 2020-12-11 | 华通机电股份有限公司 | Residual current operated circuit breaker capable of self-checking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111614059A (en) * | 2020-07-09 | 2020-09-01 | 上海复旦微电子集团股份有限公司 | Ground fault protection system |
| US11588317B2 (en) | 2020-07-09 | 2023-02-21 | Shanghai Fudan Microelectronics Group Company Limited | Ground fault circuit interrupter with leakage protection module and self-test module |
| CN112072613A (en) * | 2020-09-15 | 2020-12-11 | 华通机电股份有限公司 | Residual current operated circuit breaker capable of self-checking |
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