CN104422830A - Leakage protector and leakage protection function detection method - Google Patents
Leakage protector and leakage protection function detection method Download PDFInfo
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Abstract
The invention provides a leakage protector and a leakage protection function detection method. The leakage protection function detection method comprises: when a leakage protector is set in an automatic detection state, periodically determining whether the present timing time reaches preset time span; and under the condition that the present timing time reaches the preset time span, the leakage protector automatically simulating to generate leakage current in a power grid, measuring the leakage current in the power grid, and determining whether the leakage current is larger than a preset leakage current threshold value, and under the condition that the leakage current is generated in the power grid by simulation and the leakage current in the power grid is not larger than the preset leakage current threshold value, outputting a leakage protection function fault signal or outputting a breaker breaking control signal. Thus, the leakage protector can be detected at regular time without manual operation, so as to ensure the leakage protection performance of the leakage protector, and effectively prevent various risks and loss caused by failure of the leakage protector.
Description
Technical field
The present invention relates to earth leakage protection field, relate more specifically to a kind of earth leakage protective device and creepage protection function detection method.
Background technology
Earth leakage protective device is a kind of safe electrical appliance, and it, by the size of the phase line earth leakage current that detects protected electrical network inside and occur or shock current, sends isolating switch disjunction control signal and complete isolating switch disjunction to disconnect mains supply.
As a kind of safe electrical appliance, very strict to the requirement of earth leakage protective device capability and performance.After earth leakage protective device installs, answer service test button to detect the operating characteristic of earth leakage protective device, confirmation can just allow to come into operation after regular event.And, in use also regularly should test its reliability by test button, test that user needs regularly (such as, the test of each moon is once).But user in actual use, seldom carry out periodic detection, personal safety, apparatus insulated etc. is protected and there is potential risk.Once earth leakage protective device lost efficacy, when shock current or phase line earth leakage current occur, huge loss will be produced.
Therefore, need a kind of earth leakage protective device with self-checking function, it can carry out periodic detection to earth leakage protective device in without the need to the manually operated situation of user.
Summary of the invention
Embodiments provide a kind of earth leakage protective device and creepage protection function detection method; it can carry out periodic detection to earth leakage protective device in without the need to manually operated situation, ensure that the earth leakage protection dependable performance of earth leakage protective device while alleviating burden for users.
According to an aspect of the present invention, provide a kind of creepage protection function detection method, comprising: periodically judge whether the present timing time reaches schedule time length; When judging that the present timing time reaches described schedule time length; earth leakage protective device automatic imitation produces the leakage current in electrical network; measure the leakage current in electrical network and judge whether leakage current is greater than presetting leakage current threshold values; and in electrical network simulation produce leakage current and the leakage current judging in electrical network is not more than predetermined leakage current threshold values, export creepage protection function fault-signal or export isolating switch disjunction control signal.
According to a further aspect of the invention, providing a kind of earth leakage protective device, comprising: control module, for carrying out timing to schedule time length, and exporting leakage analog control signal when reaching described schedule time length; Leakage analog module, for receiving described leakage analog control signal, and the leakage current in the control Imitating electrical network of described leakage analog control signal; And leakage current detecting module, for measuring the leakage current in electrical network, and output detections signal; Wherein, described control module also receives described detection signal; and when described control module has outputed leakage analog control signal, export creepage protection function fault-signal when the leakage current judged in electrical network according to the detection signal received is not more than predetermined leakage current threshold value or exported isolating switch disjunction control signal.
Utilization can carry out periodic detection to earth leakage protective device according to the earth leakage protective device of the embodiment of the present invention and creepage protection function detection method in without the need to manually operated situation; thus ensure that the earth leakage protection performance of earth leakage protective device, effectively can avoid the various risk that caused and loss because earth leakage protective device lost efficacy.
Accompanying drawing explanation
By the following detailed description by accompanying drawing, more easily will understand the present invention, wherein identical label specifies mutually isostructural unit, and wherein:
Fig. 1 shows the schematic diagram of a kind of earth leakage protective device in prior art;
Fig. 2 shows the process flow diagram one of the creepage protection function detection method according to the embodiment of the present invention;
Fig. 3 shows the flowchart 2 of the creepage protection function detection method according to the embodiment of the present invention;
Fig. 4 shows the flow chart 3 of the creepage protection function detection method according to the embodiment of the present invention;
Fig. 5 shows the schematic block diagram of the earth leakage protective device according to the embodiment of the present invention; And
Fig. 6 shows the schematic diagram of the earth leakage protective device according to the embodiment of the present invention.
Embodiment
The one exemplary embodiment of the present invention that the following describes to help complete understanding by claim and equivalents thereof with reference to accompanying drawing is provided.It comprises various details to help understanding, but they should be thought it is only exemplary.Therefore, those of ordinary skill in the art will be appreciated that, can make various change and amendment, and can not deviate from scope and spirit of the present invention to the embodiments described herein.Equally, for clarity and conciseness, the description to known function and structure is eliminated.
As shown in Figure 1; show the schematic diagram of a kind of earth leakage protective device in prior art, earth leakage protective device mainly comprises: zero sequence current mutual inductor (ZCT) 10, leakage current processing module 20, control module 30, breaker module 40 and leakage analog module 50.
ZCT10 measures the leakage current in electrical network, the measuring-signal that the leakage current processing module 20 couples of ZCT10 export processes to produce the leakage current figure signal meeting control module 30 input request signal, and whether the leakage current in the leakage current figure signal determination current electric grid that control module 30 exports according to leakage current processing module 20 is greater than predetermined leakage current threshold value.
Breaker module 40 comprises disconnect control module and disconnect.
The two ends of leakage analog module 50 are connected with the lead-in wire terminal A of arbitrary phase power lead in the electrical network lead-in wire terminal of ZCT10 and electrical network leading-out terminal and leading-out terminal B respectively, and comprise Manual test button and resistor.
After earth leakage protective device installs; user operation Manual test button; thus; except the direct path between the lead-in wire terminal A of ZCT10 and leading-out terminal B; connect another connecting path between the lead-in wire terminal A of ZCT10 and leading-out terminal B; this another connecting path is pressed by described Manual test button and connects, and shunted the electric current that originally should flow through in the direct path between the lead-in wire terminal A of ZCT10 and leading-out terminal B thus in this another connecting path.Therefore, zero sequence current mutual inductor ZCT10 can detect that leakage current exists, thus term " leakage current in electrical network " here means the leakage current for ZCT10, and may produce (namely due to the actual generation electric leakage of electrical network, electrical network generation leak current fault), also may produce due to the action of above-mentioned leakage analog module 50 (that is, electrical network is normal, leakage analog module simulation fault).
For earth leakage protective device as shown in Figure 1, require that user's periodic operation Manual test button carrys out the serviceability of periodic detection earth leakage protective device.But, in actual use, due to a variety of causes, be difficult to ensure that user can carry out the serviceability of periodic detection earth leakage protective device by periodic operation Manual test button.
In view of the situation, the embodiment of the present invention proposes a kind of creepage protection function detection method, and it can carry out periodic detection to the serviceability of earth leakage protective device in without the need to the manually operated situation of user.
With reference to Fig. 2-Fig. 4, the creepage protection function detection method according to the embodiment of the present invention is described.
Fig. 2 shows the process flow diagram one of the earth leakage protection detection method according to the embodiment of the present invention.
In step S210, judge whether the present timing time reaches schedule time length.Schedule time length can be interval detection time of carrying out required by periodic detection to earth leakage protective device, such as one month, three months.Whenever reaching schedule time length, just start the Performance Detection to earth leakage protective device, and restart timing.
When judging that the present timing time reaches described schedule time length in step S210, the earth leakage protection detection method according to the embodiment of the present invention proceeds to step S220.
In step S220, the leakage current in simulating grid.In step S220, without the need to user's manual operation, the leakage current automatically in simulating grid.Such as, manual operation button as shown in Figure 1 or the gate-controlled switch in parallel with the manual operation button shown in Fig. 1, connect by the control of control module, thus the leakage current automatically in simulating grid.
For one of many power leads through the zero sequence current mutual inductor for measuring actual leakage current in electrical network, at this power lead through the lead-in wire terminal of zero sequence current mutual inductor and leading-out terminal, conducting another connecting path except the connecting path be made up of this power lead.
Therefore, between the lead-in wire terminal A shown in Fig. 1 and leading-out terminal B, except the direct path originally existed, partly shunted by another extra connecting path of conducting and originally flow through in the direct path between the lead-in wire terminal A and leading-out terminal B of ZCT10 and the leakage current responded to by zero sequence current mutual inductor.
In addition, in step S220, leakage analog control signal can also be exported, and under the control of this leakage analog control signal, the leakage current in simulating grid.
In step S230, measure the leakage current in electrical network.The leakage current in electrical network can be measured by zero sequence current mutual inductor.As previously mentioned, the leakage current that what " leakage current " described here referred to is for zero sequence current mutual inductor, and may produce (namely due to the actual generation electric leakage of electrical network, grid collapses, actual leakage current), also may produce due to above-mentioned leakage analog action (that is, electrical network is normal, simulation leakage current).
In step S240, judge whether the leakage current in electrical network is greater than predetermined leakage current threshold value.Predetermined leakage current threshold value is default permissible leakage current threshold value.When not carrying out leak current fault simulation, once the leakage current detected exceedes permissible leakage current threshold value, then can judge that leak current fault has appearred in electrical network in earth leakage protective device normal running.
As previously mentioned; owing to simulating grid power leakage electric current and measure the leakage current in electrical network in step S220 in step S230; when earth leakage protective device normal running, the leakage current in measured electrical network should be greater than described predetermined leakage current threshold value.Otherwise, then may show that earth leakage protective device breaks down.
The leakage current judging in detected electrical network in step S240 is not more than predetermined leakage current threshold value, the creepage protection function detection method according to the embodiment of the present invention proceeds to step S250.
In step S250, export creepage protection function fault-signal.Advantageously, under the control of creepage protection function fault-signal, can output alarm signal further, such as warning lamp flicker or alarm bell sound.
Alternatively or in addition to, isolating switch disjunction control signal can also be exported in step s 250, by the power supply of isolating switch disjunction electrical network, namely implement earth leakage protection action.
On the other hand, when judging that in step S240 the leakage current in detected electrical network is greater than predetermined leakage current threshold value, the creepage protection function detection method according to the embodiment of the present invention proceeds to step S260.
In step S260, the present timing time is reset, and stop simulation leakage current.In addition, when output leakage analog control signal in step S220, in step S260, described leakage analog control signal is also removed.
By the operation of step S210-S260 as shown in Figure 2, automatically periodic detection can be carried out to the earth leakage protection performance of earth leakage protective device.
In addition, when judging that in step S210 the present timing time does not reach described schedule time length, the earth leakage protection detection method according to the embodiment of the present invention proceeds to step S270.
In step S270, measure the leakage current in electrical network.
In step S280, judge whether the leakage current in electrical network is greater than predetermined leakage current threshold value.
When not simulating leakage current in electrical network, the leakage current judging in electrical network is greater than described predetermined leakage current threshold value, then show to detect that leak current fault has appearred in reality in electrical network in step S280; Otherwise, show not occur leak current fault in electrical network.
Therefore, the leakage current judging in electrical network in step S280 is greater than described predetermined leakage current threshold value, the creepage protection function detection method according to the embodiment of the present invention proceeds to step S290.
In step S290, by the power supply of isolating switch disjunction electrical network, namely implement earth leakage protection action.
Fig. 3 shows the flowchart 2 of the earth leakage protection detection method according to the embodiment of the present invention.Before the step S210 shown in Fig. 2, first can also determine that implementing earth leakage protection performance detects automatically, and start to carry out timing to schedule time length.
In step S310, receive autosensing mode setting operation.Autosensing mode setting operation can be the autosensing mode setting operation that user manually carries out, also can be complete after earth leakage protective device installs manually detect after the autosensing mode setting operation that automatically carries out.
Such as, can arrange autosensing mode and arrange button and manual detection mode arranges button, user can press autosensing mode and arrange button or manual detection mode arranges button, correspondingly to trigger autosensing mode or manual detection mode.
Such as, automatic/hand detecting pattern can be set button is set, the trigger manual detecting pattern when user presses this button, otherwise be defaulted as autosensing mode; Vice versa.
Such as, autosensing mode is not set button is set and/or manual detection mode arranges button, manually press Manual test button and trigger manual test user and in the successful situation of Manual test, automatically can be switched to autosensing mode.In the case, Manual test successfully can think autosensing mode setting operation.
In step S320, entering autosensing mode, is zero by present timing set of time.
In step S330, timing is carried out to described schedule time length.
Next, the earth leakage protection detection method according to the embodiment of the present invention proceeds to step S210, judges whether the present timing time reaches described schedule time length.
In Fig. 3, the operation of step S210 to S290 is identical with the operation of step S210 to S290 in Fig. 2, no longer repeats at this.
The leakage current judging in electrical network in step S280 is not more than described predetermined leakage current threshold value; that is: in electrical network, do not simulate leakage current and the leakage current judging in electrical network is not more than described predetermined leakage current threshold value; creepage protection function detection method according to the embodiment of the present invention returns step S330, continues to carry out timing to described schedule time length.
In addition, after being reset the present timing time in step S260, the creepage protection function detection method according to the embodiment of the present invention also returns step S330, again to carry out timing to described schedule time length.
Fig. 4 shows the flow chart 3 of the earth leakage protection detection method according to the embodiment of the present invention.Before the step S310 shown in Fig. 3, Manual test operation can also be performed.
In step S410, receive manual detection mode setting operation.
In step S420, receive the operation of manual fault simulation, described manual fault simulation operation comprises: for one of many power leads through the zero sequence current mutual inductor for measuring leakage current in electrical network, at this power lead through the lead-in wire terminal of zero sequence current mutual inductor and leading-out terminal, manually conducting another connecting path except the connecting path be made up of this power lead, i.e. manually conducting another extra connecting path except passing the connecting path of zero sequence current mutual inductor.
Such as, manual operation button as shown in Figure 1 can be pressed, connect the connecting path comprising manual operation button and resistor as shown in Figure 1, thus partly shunting is flow through and the electric current responded to by zero sequence current mutual inductor originally in the direct path between the lead-in wire terminal A and leading-out terminal B of ZCT10, simulates leakage current in electrical network thus.
In step S430, measure the leakage current in electrical network.
In step S440, judge whether the leakage current in electrical network is greater than predetermined leakage current threshold value.
As previously mentioned; manually simulate leakage current in the step s 420 and in step S430, measure the leakage current in electrical network; when earth leakage protective device normal running, the leakage current in measured electrical network should be greater than described predetermined leakage current threshold value.Otherwise, then may show that earth leakage protective device breaks down.
The leakage current judging in electrical network in step S440 is greater than described predetermined leakage current threshold value, the creepage protection function detection method according to the embodiment of the present invention proceeds to step S310, receives autosensing mode setting operation.
Otherwise the leakage current judging in electrical network in step S440 is not more than described predetermined leakage current threshold value, the creepage protection function detection method according to the embodiment of the present invention proceeds to step S450.
In step S450, export creepage protection function fault-signal.
Alternatively or in addition to, isolating switch disjunction control signal can also be exported in step S450, by the power supply of isolating switch disjunction electrical network, namely implement earth leakage protection action.
In Fig. 4, the operation of step S310-S330 is identical with the operation of step S310-S330 in Fig. 3, and in Fig. 4, the operation of step S210 to S290 is identical with the operation of step S210 to S290 in Fig. 2, no longer repeats at this.
Fig. 5 shows the schematic block diagram of the earth leakage protective device according to the embodiment of the present invention.Earth leakage protective device according to the embodiment of the present invention comprises: zero sequence current mutual inductor (ZCT) 510, leakage current processing module 520, control module 530, breaker module 540 and leakage analog module 550.
Zero sequence current mutual inductor (ZCT) 510 and leakage current processing module 520 can be referred to as leakage current detecting module, also export for the leakage current measured in electrical network the detection signal meeting described control module 530 input request signal.
Although describe current sensor for zero sequence current mutual inductor (ZCT) in embodiments of the present invention, but the present invention is not limited thereto.
Control module 530 for carrying out timing to schedule time length, and exports leakage analog control signal when reaching described schedule time length.
Breaker module 540 comprises disconnect and disconnect control module.
Leakage analog module 550 is for receiving described leakage analog control signal, and the leakage current in the control Imitating electrical network of described leakage analog control signal.
Described control module 530 also receives described detection signal; and when described control module 530 has outputed leakage analog control signal, export creepage protection function fault-signal when the leakage current judged in electrical network according to the detection signal received is not more than predetermined leakage current threshold value.
Alternatively or in addition to, described control module 530 can also export isolating switch disjunction control signal, residual current circuit breaker topworks in described breaker module 540 receives described isolating switch disjunction control signal, and under the control of described isolating switch disjunction control signal, realize the disjunction of the disconnect comprised in described breaker module, thus disconnect the power supply of described electrical network.
As previously mentioned, when outputing leakage analog control signal (namely having carried out grid power leakage fault simulation), described control module 530 should judge that the leakage current in the electrical network that described leakage current processing module detects is greater than predetermined leakage current threshold value.Otherwise if described control module 530 judges that the leakage current in the electrical network that described leakage current processing module detects is not more than predetermined leakage current threshold value, then showing that earth leakage protective device breaks down can not play a protective role effectively.Described earth leakage protective device breaks down and may comprise described leakage current detecting module and to break down or described control module breaks down.
Described leakage current processing module 520 receives the zero-sequence current sensed from described zero sequence current mutual inductor 510, and can such as comprise sample circuit and A/D convertor circuit.Described control module 530 can comprise microcontroller, and described microcontroller receives digitized zero-sequence current value from described A/D convertor circuit, judges whether the leakage current in electrical network is greater than predetermined leakage current threshold value according to the digitized zero-sequence current value received.
Alternatively, described leakage current processing module 520 such as can comprise sample circuit, described control module 530 comprises microcontroller, described microcontroller receives sampling zero-sequence current value from described sample circuit, AD conversion is carried out to received sampling zero-sequence current value, and judges whether the leakage current in electrical network is greater than predetermined leakage current threshold value.
In addition, as shown in Figure 5, the earth leakage protective device according to the embodiment of the present invention can also comprise: alarm module 560, for receiving described creepage protection function fault-signal, and sends alerting signal under the control of described creepage protection function fault-signal.
Alarm module 560 can comprise light emitting diode, controllable switch element and light emitting diode or controllable switch element and ring.According to different application needs, alarm module 560 can take other form.
In addition, when described control module 530 has outputed leakage analog control signal, when described control module 530 is greater than predetermined leakage current threshold value according to the leakage current that received detection signal judges in electrical network, described control module 530 restarts to carry out timing to described schedule time length, and removes described leakage analog control signal.
When described control module 530 is greater than predetermined leakage current threshold value according to the leakage current that received detection signal judges in electrical network but described control module 530 does not export leakage analog control signal, described control module exports isolating switch disjunction control signal.Disconnect control module in described breaker module 540 receives described isolating switch disjunction control signal, and under the control of described isolating switch disjunction control signal, realize the disjunction of the disconnect comprised in described breaker module, thus disconnect the power supply of described electrical network.
As shown in Figure 5, described leakage analog module 550 can comprise the first leakage analog path, the first end of described first leakage analog path is connected to the lead-in wire terminal A of one of the power lead in the electrical network lead-in wire terminal of described zero sequence current mutual inductor, second end is connected to the leading-out terminal B of this power lead in the electrical network leading-out terminal of described zero sequence current mutual inductor, and described first leakage analog path comprises the first leakage analog gauge tap.
When described control module 530 exports described leakage analog control signal, under the control of described leakage analog control signal, the electrical connection between the first end of the first leakage analog path described in described first leakage analog gauge tap conducting and the second end.
In addition, as shown in Figure 5, described leakage analog module 550 also comprises the second leakage analog path, the first end of described second leakage analog path is connected to the lead-in wire terminal A of one of the power lead in the electrical network lead-in wire terminal of described zero sequence current mutual inductor, second end is connected to the leading-out terminal B of this power lead in the electrical network leading-out terminal of described zero sequence current mutual inductor, and described second leakage analog path comprises the second leakage analog gauge tap.
Described second leakage analog switches can be Manual test button, when user presses described Manual test button, and the electrical connection between the first end of the second leakage analog path described in described second leakage analog gauge tap conducting and the second end.
As shown in Figure 5, described first leakage analog path and described second leakage analog path can partly overlap, such as resistor as shown in Figure 5 can as a part for described first leakage analog path, also can as a part for described second leakage analog path.
Alternately, described first leakage analog path and described second leakage analog path can be completely different from each other, such as, described first leakage analog path comprises the first leakage analog gauge tap and the first resistor, described second leakage analog path comprises the second leakage analog gauge tap and the second resistor, described first resistor and described second resistor different from each other, the first end of described first leakage analog path and the second end are connected with the first end of described second leakage analog path and the second end respectively.
In addition, as shown in Figure 5, described earth leakage protective device can also comprise detecting pattern and arrange module 580, for exporting automatic detection signal when autosensing mode is set up to described control module 530.
Described detecting pattern arranges module 580 and can comprise autosensing mode and arrange button and manual detection mode arranges button.User can press autosensing mode and arrange button or manual detection mode arranges button, correspondingly to trigger autosensing mode or manual detection mode.When autosensing mode is set up, described detecting pattern arranges module 580 and exports automatic detection signal, and when manual detection mode is set up, described detecting pattern arranges module 580 and exports manual detection signal or stop exporting automatic detection signal.
Alternately, described detecting pattern arranges module 580 and can comprise automatic/hand detecting pattern and arrange button, the trigger manual detecting pattern when user presses this button, otherwise is defaulted as autosensing mode; Vice versa.When this button is pressed, described detecting pattern arranges module 580 and exports automatic detection signal, and when this button is not pressed, described detecting pattern arranges module 580 and exports manual detection signal or stop exporting automatic detection signal.
Alternately, described detecting pattern arranges module 580 can comprise toggle switch, when toggle switch is in primary importance, described detecting pattern arranges module 580 and exports automatic detection signal, when toggle switch is in the second place, described detecting pattern arranges module 580 and exports manual detection signal or stop exporting automatic detection signal.
Described control module 530, after receiving described automatic detection signal, just carries out timing to described schedule time length, and exports leakage analog control signal when reaching described schedule time length.Described control module 530, when receiving described manual detection signal or not receiving described automatic detection signal, stops carrying out timing to schedule time length.
In addition; as shown in Figure 5; described earth leakage protective device can also comprise oscillatory circuit 570; for generation of the pulse with the built-in oscillation cycle; and described pulse is supplied to described control module 530; described control module 530 counts described pulse, to carry out timing to described schedule time length.
Alternately, described control module 530 can be built-in with oscillatory circuit, and according to the pulse with the built-in oscillation cycle that its built-in oscillatory circuit exports, carries out timing to described schedule time length.
Fig. 6 shows the schematic diagram of the breaker protector according to the embodiment of the present invention.Except the module shown in Fig. 5, in Fig. 6, also show the auxiliary circuits such as anti-impact circuit MOV, anti-jamming circuit EMC, bridge rectifier, mu balanced circuit.
As shown in Figure 6, oscillatory circuit 570 is implemented as OSC timing circuit, control module 530 is implemented as microcontroller, and detecting pattern arranges module 580 and is implemented as automatic/hand selector switch, and breaker module is implemented as gate-controlled switch T1, topworks B and disconnect.
Utilization can carry out periodic detection to earth leakage protective device according to the earth leakage protective device of the embodiment of the present invention and creepage protection function detection method in without the need to manually operated situation; thus ensure that the earth leakage protection performance of earth leakage protective device, effectively can avoid the various risk that caused and loss because earth leakage protective device lost efficacy.
In addition, according to earth leakage protective device and the creepage protection function detection method of the embodiment of the present invention, manual mode can be switched at any time and carry out earth leakage protective device Performance Detection, therefore can be consistent with the operation of existing earth leakage protective device well.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (15)
1. a creepage protection function detection method, comprising:
Periodically judge whether the present timing time reaches schedule time length;
When judging that the present timing time reaches described schedule time length, automatic imitation produces the leakage current in electrical network;
Measure the leakage current in electrical network and judge whether the leakage current in electrical network is greater than predetermined leakage current threshold value; And
In electrical network simulation produce leakage current and the leakage current judging in electrical network is not more than predetermined leakage current threshold value, export creepage protection function fault-signal or export isolating switch disjunction control signal.
2. creepage protection function detection method as claimed in claim 1, also comprises:
Under the control of described creepage protection function fault-signal, output alarm signal.
3. creepage protection function detection method as claimed in claim 1; wherein; when judging that the present timing time reaches described schedule time length, export leakage analog control signal and leakage current in simulating grid, and described creepage protection function detection method also comprises:
In electrical network, simulate leakage current and the leakage current judging in electrical network is greater than predetermined leakage current threshold value, the present timing time is reset, and correspondingly removes described leakage analog control signal.
4. creepage protection function detection method as claimed in claim 1, wherein, when judge the leakage current in electrical network be greater than predetermined leakage current threshold value but leakage current not in simulating grid, by the power supply of electrical network described in isolating switch disjunction.
5. creepage protection function detection method as claimed in claim 1, wherein, the leak current fault in simulating grid comprises:
Export leakage analog control signal; And
Under the control of described leakage analog control signal, for one of many power leads through the zero sequence current mutual inductor for measuring leakage current in electrical network, at this power lead through the lead-in wire terminal of zero sequence current mutual inductor and leading-out terminal, conducting another connecting path except the connecting path be made up of this power lead.
6. creepage protection function detection method as claimed in claim 1, before judging whether the present timing time reach schedule time length, also comprises:
Receive autosensing mode setting operation; And
Be zero by present timing set of time, and start to carry out timing to described schedule time length.
7. creepage protection function detection method as claimed in claim 6, before reception autosensing mode setting operation, also comprises:
Receive manual detection mode setting operation;
Receive the operation of manual fault simulation, described manual fault simulation operation comprises: for one of many power leads through the zero sequence current mutual inductor for measuring leakage current in electrical network, at this power lead through the lead-in wire terminal of zero sequence current mutual inductor and leading-out terminal, manually conducting another connecting path except the connecting path be made up of this power lead;
Measure the leakage current in electrical network and judge whether the leakage current in electrical network is greater than predetermined leakage current threshold value; And
When judging that the leakage current in electrical network is not more than predetermined leakage current threshold value, exporting creepage protection function fault-signal or exporting isolating switch disjunction control signal.
8. an earth leakage protective device, comprising:
Control module, for carrying out timing to schedule time length, and exports leakage analog control signal when reaching described schedule time length;
Leakage analog module, for receiving described leakage analog control signal, and the leakage current in the control Imitating electrical network of described leakage analog control signal; And
Leakage current detecting module, for measuring the leakage current in electrical network, and output detections signal;
Wherein, described control module also receives described detection signal; and when described control module has outputed leakage analog control signal, export creepage protection function fault-signal when the leakage current judged in electrical network according to the detection signal received is not more than predetermined leakage current threshold value or exported isolating switch disjunction control signal.
9. earth leakage protective device as claimed in claim 8, also comprising: alarm module, for receiving described creepage protection function fault-signal, and sending alerting signal under the control of described creepage protection function fault-signal.
10. earth leakage protective device as claimed in claim 8; wherein; when described control module has outputed leakage analog control signal; when the leakage current judged in electrical network according to the detection signal received is greater than predetermined leakage current threshold value; described control module restarts to carry out timing to described schedule time length, and removes described leakage analog control signal.
11. earth leakage protective devices as claimed in claim 9, also comprise: breaker module, for realizing the disjunction of the isolating switch comprised in described breaker module;
Wherein, when the leakage current that the detection signal that described control module foundation receives judges in electrical network is greater than predetermined leakage current threshold value but described control module does not export leakage analog control signal, described control module exports isolating switch disjunction control signal;
Described breaker module receives described isolating switch disjunction control signal, and realizes the disjunction of the isolating switch comprised in described breaker module under the control of described isolating switch disjunction control signal.
12. earth leakage protective devices as claimed in claim 9; wherein; described leakage analog module comprises the first leakage analog path; the first end of described first leakage analog path is connected to the lead-in wire terminal of one of the power lead in the electrical network lead-in wire terminal of described zero sequence current mutual inductor; second end is connected to the leading-out terminal of this power lead in the electrical network leading-out terminal of described zero sequence current mutual inductor; and described first leakage analog path comprises the first leakage analog gauge tap, and
When described control module exports described leakage analog control signal, the electrical connection between the first end of the first leakage analog path described in described first leakage analog gauge tap conducting and the second end.
13. earth leakage protective devices as claimed in claim 9, also comprise: detecting pattern arranges module, for exporting automatic detection signal when autosensing mode is set up to described control module,
Described control module, after receiving described automatic detection signal, just carries out timing to described schedule time length, and exports leakage analog control signal when reaching described schedule time length.
14. earth leakage protective devices as claimed in claim 13, wherein, described detecting pattern arranges module also for exporting manual detection signal when manual detection mode is set up to described control module or stopping exporting automatic detection signal to described control module,
Described control module, when receiving described manual detection signal or not receiving described automatic detection signal, stops carrying out timing to schedule time length.
15. earth leakage protective devices as claimed in claim 9, also comprise: oscillatory circuit, for generation of the pulse with the built-in oscillation cycle, and described pulse are supplied to described control module;
Described control module counts described pulse, to carry out timing to described schedule time length.
Priority Applications (1)
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| CN106253216A (en) * | 2016-09-26 | 2016-12-21 | 东莞市达昌实业有限公司 | A kind of can timing earth leakage protective device |
| CN106257294A (en) * | 2015-06-16 | 2016-12-28 | 施耐德电器工业公司 | For the method and apparatus detecting the fault in electrical network |
| CN107069648A (en) * | 2017-03-22 | 2017-08-18 | 广州炫通电气科技有限公司 | Earth leakage protecting method |
| CN107196270A (en) * | 2017-06-30 | 2017-09-22 | 芜湖佳宏新材料股份有限公司 | A kind of electricity floor heating, the GFCI control systems of hot-water heating controller |
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| CN107579505A (en) * | 2016-07-05 | 2018-01-12 | 苏州益而益电器制造有限公司 | Use electric detection means |
| CN107884633A (en) * | 2016-09-30 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | The fault detection method and device of electric cooking pot and its anti-spilled detection means |
| WO2018120943A1 (en) * | 2016-12-28 | 2018-07-05 | 东莞市拓诚实业有限公司 | Timing leakage protector |
| CN108710080A (en) * | 2018-08-10 | 2018-10-26 | 江苏创能电器有限公司 | Leakage analog trial jump apparatus and system |
| WO2018196531A1 (en) * | 2017-04-24 | 2018-11-01 | 深圳曼顿科技有限公司 | Novel circuit breaker leakage detection device and low voltage circuit breaker |
| CN109031023A (en) * | 2018-08-16 | 2018-12-18 | 杭州华春科技有限公司 | A kind of current leakage detection system with tripping catch function |
| CN109061360A (en) * | 2018-06-21 | 2018-12-21 | 浙江巨磁智能技术有限公司 | The safe self-checking system of earth leakage protective and its self checking method |
| CN109254223A (en) * | 2018-11-07 | 2019-01-22 | 深圳市众祥安全科技有限公司 | Leak electricity short-circuit detection method, open circuit protection equipment, monitoring center, system |
| CN109599832A (en) * | 2019-01-14 | 2019-04-09 | 陈劲游 | Leakage protector with regular prompt and detection functions |
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| CN112255998A (en) * | 2020-10-27 | 2021-01-22 | 呼伦贝尔安泰热电有限责任公司扎兰屯热电厂 | Quality judgment function block for DCS analog quantity |
| CN113030781A (en) * | 2021-02-26 | 2021-06-25 | 维沃移动通信有限公司 | Electric leakage detection method and electronic equipment |
| CN114079261A (en) * | 2021-11-08 | 2022-02-22 | 邹平市供电有限公司 | Intelligent leakage protection switch |
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| CN106257294A (en) * | 2015-06-16 | 2016-12-28 | 施耐德电器工业公司 | For the method and apparatus detecting the fault in electrical network |
| CN107294059A (en) * | 2016-04-01 | 2017-10-24 | 苏州益而益电器制造有限公司 | Use electric detection means |
| CN107579505A (en) * | 2016-07-05 | 2018-01-12 | 苏州益而益电器制造有限公司 | Use electric detection means |
| CN107579505B (en) * | 2016-07-05 | 2019-05-24 | 苏州益而益电器制造有限公司 | Use electric detection means |
| CN106253216A (en) * | 2016-09-26 | 2016-12-21 | 东莞市达昌实业有限公司 | A kind of can timing earth leakage protective device |
| CN107884633B (en) * | 2016-09-30 | 2020-07-31 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and fault detection method and device of anti-overflow detection device of electric cooker |
| CN107884633A (en) * | 2016-09-30 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | The fault detection method and device of electric cooking pot and its anti-spilled detection means |
| WO2018120943A1 (en) * | 2016-12-28 | 2018-07-05 | 东莞市拓诚实业有限公司 | Timing leakage protector |
| CN107069648A (en) * | 2017-03-22 | 2017-08-18 | 广州炫通电气科技有限公司 | Earth leakage protecting method |
| WO2018196531A1 (en) * | 2017-04-24 | 2018-11-01 | 深圳曼顿科技有限公司 | Novel circuit breaker leakage detection device and low voltage circuit breaker |
| CN107196270B (en) * | 2017-06-30 | 2019-01-15 | 芜湖佳宏新材料股份有限公司 | A kind of electricity floor heating, the GFCI control system of hot-water heating controller |
| CN107196270A (en) * | 2017-06-30 | 2017-09-22 | 芜湖佳宏新材料股份有限公司 | A kind of electricity floor heating, the GFCI control systems of hot-water heating controller |
| CN109061360B (en) * | 2018-06-21 | 2020-12-15 | 浙江巨磁智能技术有限公司 | Leakage protection safety self-checking system and self-checking method thereof |
| CN109061360A (en) * | 2018-06-21 | 2018-12-21 | 浙江巨磁智能技术有限公司 | The safe self-checking system of earth leakage protective and its self checking method |
| CN108710080A (en) * | 2018-08-10 | 2018-10-26 | 江苏创能电器有限公司 | Leakage analog trial jump apparatus and system |
| CN109031023A (en) * | 2018-08-16 | 2018-12-18 | 杭州华春科技有限公司 | A kind of current leakage detection system with tripping catch function |
| CN109254223A (en) * | 2018-11-07 | 2019-01-22 | 深圳市众祥安全科技有限公司 | Leak electricity short-circuit detection method, open circuit protection equipment, monitoring center, system |
| CN109254223B (en) * | 2018-11-07 | 2021-10-29 | 深圳市众信消防电气检测有限公司 | Leakage short circuit detection method, open circuit protection equipment, monitoring center and system |
| CN109599832A (en) * | 2019-01-14 | 2019-04-09 | 陈劲游 | Leakage protector with regular prompt and detection functions |
| WO2020147427A1 (en) * | 2019-01-14 | 2020-07-23 | 陈劲游 | Leakage protector capable of regularly prompting detection |
| CN111585245A (en) * | 2020-04-01 | 2020-08-25 | 南京正泰龙科技有限公司 | Residual current circuit breaker and control method thereof |
| CN111585245B (en) * | 2020-04-01 | 2022-02-25 | 南京正泰龙科技有限公司 | Residual current circuit breaker and control method thereof |
| CN112255998A (en) * | 2020-10-27 | 2021-01-22 | 呼伦贝尔安泰热电有限责任公司扎兰屯热电厂 | Quality judgment function block for DCS analog quantity |
| CN113030781A (en) * | 2021-02-26 | 2021-06-25 | 维沃移动通信有限公司 | Electric leakage detection method and electronic equipment |
| CN114079261A (en) * | 2021-11-08 | 2022-02-22 | 邹平市供电有限公司 | Intelligent leakage protection switch |
| CN114079261B (en) * | 2021-11-08 | 2023-09-29 | 邹平市供电有限公司 | Intelligent leakage protection switch |
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