CN203883450U - Electric leakage protector - Google Patents
Electric leakage protector Download PDFInfo
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- CN203883450U CN203883450U CN201420143191.2U CN201420143191U CN203883450U CN 203883450 U CN203883450 U CN 203883450U CN 201420143191 U CN201420143191 U CN 201420143191U CN 203883450 U CN203883450 U CN 203883450U
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- Prior art keywords
- alarm
- protective device
- earth leakage
- leakage protective
- controller
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- 230000001012 protector Effects 0.000 title abstract 4
- 230000001681 protective effect Effects 0.000 claims description 61
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000013024 troubleshooting Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses an electric leakage protector. The electric leakage protector comprises a controller and an alarm; the controller judges determines the value of leakage current in a circuit; and when the leakage current exists, and the value of the leakage current is lower than an electric leakage tripping threshold value, the controller outputs alarm instructions to the alarm, so that the alarm gives an alarm. When the leakage current exists in the circuit, the electric leakage protector can give early warning to a user, so that the user can perform maintenance in advance to realize troubleshooting, and therefore, safety hidden troubles can be eliminated, and downtime can be reduced, and loss of the user which is caused by power outage can be decreased maximally or avoided.
Description
Technical field
The utility model relates to a kind of earth leakage protective device.
Background technology
In electric device, electric current flows to load from power supply, then flows back to power supply.In the ideal situation, the electric current that flows to load equals to flow back to the electric current of power supply.In actual applications, flow to the electric current of load and be called as residual current from the difference between currents in load flow telegram in reply source.While there is earth fault, current direction the earth, thus also produce residual current.Electrical installation produces residual current, that is to say usually said electric leakage.The safe current that human body can bear, when 220V, is about below 20～30mA.
For electric device is normally moved, protection equipment and personal safety usually arrange earth leakage protective device in circuit, and earth leakage protective device can arrange electric leakage dropout threshold value, and when leakage current reaches dropout threshold value, earth leakage protective device can cause that circuit disconnects.
For example, Fig. 1 illustrates the existing RCBO(of Schneider Electric Devices company with the residual current circuit breaker of overcurrent protection) and RCCB(not with the residual current circuit breaker of overcurrent protection).Electric leakage dropout threshold value has 10,30,100, tetra-kinds of specifications of 300mA.10,30mA is for the protection of human body.100,300mA is for the protection of circuit.Reach after dropout threshold value, earth leakage protective device moves and cut-out circuit.
The protective value of the earth leakage protective device of prior art remains the need for further improvement.
Utility model content
The object of the utility model is to provide a kind of security performance better earth leakage protective device.
Thus, the utility model provides a kind of earth leakage protective device, and it comprises controller and alarm; leakage current value in this controller decision circuitry; when leakage current exists but leakage current value during lower than electric leakage dropout threshold value, this controller is to the instruction of alarm output alarm, thereby makes alarm equipment alarm.
Preferably, also comprise ASIC electric leakage application-specific integrated circuit (ASIC), when leakage current is more than or equal to dangerous values, signal passes through this ASIC electric leakage application-specific integrated circuit (ASIC) and directly judges, drive actuator is threaded off mechanical component.
Preferably, described ASIC electric leakage application-specific integrated circuit (ASIC) is to alarm output dropout alarm command, makes the alarm warning of threading off.
Preferably, when leakage current value reaches electric leakage dropout threshold value but thread off to lose efficacy and while causing not threading off, described controller makes alarm equipment alarm to the instruction of alarm output alarm.
Preferably, described controller is microcontroller (MCU).
Preferably, described alarm is the mixed alarm of voice guard, light crossing-signal or sound and light.
Preferably, when leakage current value is during lower than electric leakage dropout threshold value, described alarm sends orange-colored light.
Preferably, when leakage current value reaches electric leakage dropout threshold value but thread off to lose efficacy and while causing not threading off, described alarm sends red light.
Preferably, described alarm is arranged at the front of this earth leakage protective device, and exposes from the surface in this front.
Preferably, described alarm comprises voice guard, and it is inner and covered firmly that this voice guard is arranged on earth leakage protective device.
Preferably, described alarm is arranged on the outside and spaced apart with this housing of earth leakage protective device housing.
Preferably, being connected between controller and alarm is wired connection or wireless connections.
Inventor of the present utility model has deep research to earth leakage protective device.Inventor of the present utility model finds that the earth leakage protective device of prior art needs further to improve.For example, the electric leakage of circuit aspect is to pass in time, progressively occurs, leakage current value slowly increases, and still, existing product is not before reaching dropout threshold value, even if there is leakage current in circuit, product can not move yet, and can not give any indication of user simultaneously yet.Reach after dropout threshold value, tripping operation rapidly, cuts off electric current.There is no good power supply continuity.The RCBO of large electric leakage dropout threshold value exists 30mA to leak electricity above in the line, but leakage current value does not reach electric leakage dropout threshold value for example when 100mA or 300mA, product is failure to actuate, still normally connect circuit, do not do any demonstration yet, tell in user loop and have a dangerous large leakage current, have serious potential safety hazard.
Therefore; inventor of the present utility model is by the alarm of being controlled by controller for earth leakage protective device setting; while making to have leakage current in circuit; earth leakage protective device can be given early warning of user; allow user overhaul in advance, fix a breakdown, thereby can eliminate safe hidden trouble; reduce downtime, the loss that farthest reduces or avoid power failure to cause to user.
Accompanying drawing explanation
Fig. 1 is the stereogram of the earth leakage protective device of prior art.
Fig. 2 be do not thread off according to the stereogram of earth leakage protective device of the present utility model.
Fig. 3 be threaded off according to the stereogram of earth leakage protective device of the present utility model.
Fig. 4 is according to the theory diagram of the first embodiment of earth leakage protective device of the present utility model.
Fig. 5 is according to the theory diagram of the second embodiment of earth leakage protective device of the present utility model.
Fig. 6 is removing the side view after side cover according to earth leakage protective device of the present utility model.
Embodiment
The embodiment of earth leakage protective device of the present utility model is described hereinafter, with reference to the accompanying drawings.
At the embodiment of this record, being specific embodiment of the present utility model, for design of the present utility model is described, is all explanatory and exemplary, should not be construed as the restriction to the utility model execution mode and the utility model scope.Except the embodiment of this record, those skilled in the art can also adopt apparent other technical scheme based on the application's claims and the disclosed content of specification, and these technical schemes comprise the technical scheme of making any apparent substitutions and modifications adopting the embodiment in this record.
The accompanying drawing of this specification is schematic diagram, and aid illustration design of the present utility model schematically shows shape and the correlation thereof of each several part.Identical reference marker is for part like representation class.
The utility model is a kind of new earth leakage protective device, before dropout, possesses warning function.Preferably, after reaching electric leakage dropout threshold value, mechanical component inefficacy attonity, circuit is not cut off, and product possesses warning function.
Fig. 2 illustrate do not thread off according to the stereogram of earth leakage protective device of the present utility model, Fig. 3 illustrate threaded off according to the stereogram of earth leakage protective device of the present utility model, as shown in the figure, alarm 3 exposes in the front of earth leakage protective device.
Fig. 4 illustrates according to the theory diagram of the first embodiment of earth leakage protective device of the present utility model; Fig. 5 illustrates according to the theory diagram of the second embodiment of earth leakage protective device of the present utility model, and Fig. 6 illustrates according to earth leakage protective device of the present utility model and removing the side view after side cover.
For the first embodiment, as shown in Figure 4, alarm 3 is buzzer or LED lamp, and controller 2 is MCU(microcontrollers).As shown in Figures 2 and 4; earth leakage protective device 1 comprises controller 2 and alarm 3, and the leakage current value in these controller 2 decision circuitry, when leakage current exists but leakage current value during lower than electric leakage dropout threshold value; this controller 2 is to alarm 3 output alarm instructions, thereby makes alarm equipment alarm.Specifically, zero-sequence mutual inductance coil provides letting out the inducing function of leakage current, has electric leakage in circuit, and the vector of line loop current is non-vanishing, and coil produces sensor current signal.This current signal flows to MCU micro-control unit through level match and filtering.
Preferably, when leakage current value reaches electric leakage dropout threshold value but thread off to lose efficacy and while causing not threading off, alarm 3 is also reported to the police.
With further reference to Fig. 6, it is illustrated in the layout in the earth leakage protective device 1 of the present embodiment.As shown in the figure, MCU chip 2 is arranged on illustrated circuit board, and alarm 3 arranges the corner, upper left of " protruding " glyph shape in the drawings, is actually the bottom right corner below that is arranged on as shown in Figure 2 earth leakage protective device 1.In addition, label 4 finger relays, label 5 is test resistance, label 6 finger primary lines, label 7 is electric leakage mutual inductors, and label 8 finger RCD side mechanical components.
Being connected between controller 2 and alarm 3 can be wired connection, can be also wireless connections.
As shown in Figure 3, controller 2 judgement leakage current values, and send instruction to alarm 3, to control the indication of alarm 3.Controller 2 can be microcontroller (MCU).
According to actual needs, this warning can be by forms such as sound, light.Alarm can be voice guard, light crossing-signal or sound and the mixed alarm of light etc.Preferably, alarm is light-emitting diode (LED).
In an embodiment, circuit normally connect or leakage current when safe range, earth leakage protective device 1 is not reported to the police.
When dangerous leakage current, but while not reaching trip threshold, LED lamp is reported to the police, for example indicate orange, or, for voice guard, can be with the acoustic alarm at longer interval between sound.
When leakage current reaches dropout threshold value, earth leakage protective device 1 is threaded off release, thereby cuts off electric current.
Yet, if controller 2 judgement leakage currents have reached dropout threshold value, but while not producing dropout action because of reasons such as mechanical failures, LED lamp is also distinguished to report to the police with different colours, for example red, or, for voice guard, chimes of doom can be that two continuous sound are one group, between every group of sound with longer interval.
The early warning providing according to earth leakage protective device, user can shift to an earlier date repair apparatus, fixes a breakdown.Thus, can eliminate safe hidden trouble, reduce downtime, the loss that farthest reduces or avoid power failure to cause to user.
Following table 1 exemplarily illustrate according to earth leakage protective device of the present utility model in electric leakage dropout threshold value 100mA, 300mA and the alarm condition while normally threading off respectively.
Table 1
Following table 2 exemplarily illustrates the alarm condition according to earth leakage protective device of the present utility model.
Table 2
Compare with the first embodiment, the second embodiment shown in Fig. 5 has increased asic chip, i.e. ASIC electric leakage application-specific integrated circuit (ASIC), and the other side except the part relevant with asic chip is the same with the first embodiment.Thus, above regard in the description of the first embodiment, according to the schematic diagram of two embodiment, can obviously be applicable to the second embodiment and partly repeat no more.
Referring to Fig. 5, in a second embodiment, zero-sequence mutual inductance coil provides letting out the inducing function of leakage current, has electric leakage in circuit, and the vector of line loop current is non-vanishing, and coil produces sensor current signal.This current signal flows to MCU(microcontroller through level match and filtering) 2 and ASIC electric leakage application-specific integrated circuit (ASIC).
MCU has stronger computing arbitration functions, can judge to leakage current size and character output alarm when leakage current has produced but also do not arrived dangerous values, the generation of reminding user fault current, therefore, the first embodiment as shown in Figure 4 can realize the object of the utility model.Yet inventor also finds, the calculation function of MCU depends on extraneous stable supply power voltage, when brownout, cannot provide reliable Output rusults, in other words, when brownout, does not have enough energy drives actuating mechanisms to cut off electric current.
Therefore, in a second embodiment specialized designs ASIC electric leakage application-specific integrated circuit (ASIC).The feature of asic chip is not rely on stable voltage power supply, fast operation.When leakage current is more than or equal to dangerous values, signal directly judges through ASIC, drive actions mechanism cut-out electric current, and the indication of threading off is provided.
As shown in Figure 5, asic chip can be given alarm 3(as buzzer and/or LED lamp) indication dropout warning.But note that asic chip also can be to alarm 3 indication dropout warnings, that is, in the principle of Fig. 5, the indication loop of buzzer or LED lamp and the line between asic chip can be removed.
As can be seen here, the feature of the second embodiment is to utilize MCU calculation function to judge fault current, and warning function is provided; Meanwhile, utilize the feature of ASIC fast operation to fault current fast shut-off.
Fig. 2,3 and 6 illustrates alarm position in the exemplary embodiment; but obviously; no matter be that the mixed alarm of voice guard, light crossing-signal or sound and light can need to be arranged on the diverse location of earth leakage protective device 1 according to design; side for example, or even the position separating with earth leakage protective device 1 housing that is arranged on earth leakage protective device 1 outside.And for voice guard, can also be arranged on earth leakage protective device 1 inside and needn't see this alarm from earth leakage protective device 1 outside.
Above the execution mode of earth leakage protective device of the present utility model is illustrated.For the specific features of earth leakage protective device of the present utility model, as the effect of feature that shape, size and position can above-mentioned disclosures, carry out specific design, these designs are all that those skilled in the art can realize.And, each technical characterictic of above-mentioned disclosure that be not limited to disclose with combination further feature, those skilled in the art also can carry out other combination between each technical characterictic according to the object of utility model, to realize the object of the utility model, are as the criterion.
Claims (12)
1. an earth leakage protective device; it is characterized in that comprising controller and alarm, the leakage current value in this controller decision circuitry, when leakage current exists but leakage current value during lower than electric leakage dropout threshold value; this controller is to the instruction of alarm output alarm, thereby makes alarm equipment alarm.
2. earth leakage protective device as claimed in claim 1; it is characterized in that, also comprise ASIC electric leakage application-specific integrated circuit (ASIC), when leakage current is more than or equal to dangerous values; signal passes through this ASIC electric leakage application-specific integrated circuit (ASIC) and directly judges, drive actuator is threaded off mechanical component.
3. earth leakage protective device as claimed in claim 1, is characterized in that, described ASIC electric leakage application-specific integrated circuit (ASIC) is to alarm output dropout alarm command, makes the alarm warning of threading off.
4. earth leakage protective device as claimed in claim 1, is characterized in that, when leakage current value reaches electric leakage dropout threshold value but thread off to lose efficacy and while causing not threading off, described controller makes alarm equipment alarm to the instruction of alarm output alarm.
5. earth leakage protective device as claimed in claim 1, is characterized in that, described controller is microcontroller (MCU).
6. earth leakage protective device as claimed in claim 1, is characterized in that, described alarm is the mixed alarm of voice guard, light crossing-signal or sound and light.
7. earth leakage protective device as claimed in claim 1, is characterized in that, when leakage current value is during lower than electric leakage dropout threshold value, described alarm sends orange-colored light.
8. earth leakage protective device as claimed in claim 3, is characterized in that, when leakage current value reaches electric leakage dropout threshold value but thread off to lose efficacy and while causing not threading off, described alarm sends red light.
9. the earth leakage protective device as described in any one in claim 1-8, is characterized in that, described alarm is arranged at the front of this earth leakage protective device, and exposes from the surface in this front.
10. the earth leakage protective device as described in any one in claim 1-8, is characterized in that, described alarm comprises voice guard, and it is inner and covered firmly that this voice guard is arranged on earth leakage protective device.
11. earth leakage protective devices as described in any one in claim 1-8, is characterized in that, described alarm is arranged on the outside and spaced apart with this housing of earth leakage protective device housing.
12. earth leakage protective devices as described in any one in claim 1-8, is characterized in that, being connected between controller and alarm is wired connection or wireless connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420143191.2U CN203883450U (en) | 2014-03-27 | 2014-03-27 | Electric leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420143191.2U CN203883450U (en) | 2014-03-27 | 2014-03-27 | Electric leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203883450U true CN203883450U (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420143191.2U Expired - Lifetime CN203883450U (en) | 2014-03-27 | 2014-03-27 | Electric leakage protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN203883450U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896469A (en) * | 2016-05-20 | 2016-08-24 | 嘉兴首信电气科技有限公司 | Circuit protection device capable of automatically monitoring running fault |
| CN107290616A (en) * | 2017-06-13 | 2017-10-24 | 芜湖桑乐金电子科技有限公司 | Heating picture electric leakage alarm device and method |
-
2014
- 2014-03-27 CN CN201420143191.2U patent/CN203883450U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896469A (en) * | 2016-05-20 | 2016-08-24 | 嘉兴首信电气科技有限公司 | Circuit protection device capable of automatically monitoring running fault |
| CN107290616A (en) * | 2017-06-13 | 2017-10-24 | 芜湖桑乐金电子科技有限公司 | Heating picture electric leakage alarm device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |