TWM573431U - Leakage current detecting device - Google Patents

Leakage current detecting device Download PDF

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TWM573431U
TWM573431U TW107214418U TW107214418U TWM573431U TW M573431 U TWM573431 U TW M573431U TW 107214418 U TW107214418 U TW 107214418U TW 107214418 U TW107214418 U TW 107214418U TW M573431 U TWM573431 U TW M573431U
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signal
circuit
detecting device
light emitting
processing unit
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TW107214418U
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林健生
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林健生
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Abstract

一種漏電偵測裝置,用以解決習知的電路保護裝置使用不便及準確率低的問題。係包含:複數隔離感測單元,各該隔離感測單元具有一光發射源及一光接收器;複數偵測迴路,各該偵測迴路具有一偵測端,該偵測端電性連接該光發射源及一受保護電路之一檢驗點;複數訊號迴路,各該訊號迴路具有一訊號電源及一輸出端,該訊號電源電性連接該光接收器,該輸出端並聯該光接收器;及一處理單元,各該隔離感測單元分別對應各該檢驗點產生一偵測訊號,該處理單元依據該數筆偵測訊號控制一開關裝置,用以截止該受保護電路之電源。A leakage detecting device is used to solve the problem of inconvenient use and low accuracy of the conventional circuit protection device. The system includes: a plurality of isolated sensing units, each of the isolated sensing units has a light emitting source and a light receiver; and a plurality of detecting circuits, each detecting circuit has a detecting end, and the detecting end is electrically connected to the detecting end a light emitting source and a checkpoint of a protected circuit; a plurality of signal loops, each of the signal loops having a signal power supply and an output terminal, the signal power supply being electrically connected to the optical receiver, the output terminal being connected in parallel with the optical receiver; And a processing unit, each of the isolation sensing units generates a detection signal corresponding to each of the inspection points, and the processing unit controls a switching device to cut off the power of the protected circuit according to the digital detection signal.

Description

漏電偵測裝置Leakage detection device

本創作係關於一種電路保護裝置,尤其是一種監控並分析電源與電器之間的電流是否異常的漏電偵測裝置。The present invention relates to a circuit protection device, and more particularly to a leakage detecting device that monitors and analyzes whether the current between the power source and the electric appliance is abnormal.

習知的電路保護裝置,係可包括保險絲、斷路器、接地線等元件,係可用於電路中可能發生的過壓、過流、過載或漏電等狀況之防護措施,習知的電路保護裝置係可串聯或並聯於電路中,當使用中的電路發生狀況而導致電路上的電力參數(例如:電壓、電流等)產生異常時,習知的電路保護裝置係可以依據電力參數之一判斷基準,適時切斷電源或進行分路,可以避免電路受損及預防人員發生感電意外。The conventional circuit protection device may include components such as a fuse, a circuit breaker, a grounding wire, etc., and may be used for protection against overvoltage, overcurrent, overload, or leakage in the circuit. Conventional circuit protection devices are used. The circuit protection device can be used to determine the reference according to one of the power parameters when the power parameters (eg, voltage, current, etc.) on the circuit are abnormal when the circuit in use occurs. Cut off the power supply or make a shunt at the right time to avoid damage to the circuit and prevent accidents.

惟,上述習知的電路保護裝置,僅能藉由電力參數的變化作出反應,當一電路系統因複雜或老舊而導致幾處電路線段的電壓、電流不穩定時,習知的電路保護裝置容易發生誤判而截止電源,導致該電路系統所執行的工作停擺或降低效率。另外,習知的電路保護裝置無法指出該電路系統發生電性異常的段落,因此截止電源後,必須全面檢視每一段電路的工作狀況,待修復問題點後重新啟用該電路系統。However, the above-mentioned conventional circuit protection device can only react by changes in power parameters. When a circuit system is unstable or old, the voltage and current of several circuit segments are unstable, and the conventional circuit protection The device is prone to misjudgment and cuts off the power supply, causing the work performed by the circuit system to shut down or reduce efficiency. In addition, the conventional circuit protection device cannot indicate the paragraph in which the electrical system is electrically abnormal. Therefore, after the power is turned off, the working condition of each segment of the circuit must be thoroughly examined, and the circuit system is re-enabled after the problem is fixed.

有鑑於此,習知的電路保護裝置確實仍有加以改善之必要。In view of this, conventional circuit protection devices do have to be improved.

為解決上述問題,本創作的目的是提供一種漏電偵測裝置,藉由分析比較數個偵測數據,提高電路功能異常判斷的準確性。In order to solve the above problems, the purpose of the present invention is to provide a leakage detecting device for improving the accuracy of circuit function abnormality judgment by analyzing and comparing several detected data.

本創作的次一目的是提供一種漏電偵測裝置,係可以通過電路上的數個檢驗點,快速找出發生電性異常狀況的部位。The second purpose of this creation is to provide a leakage detecting device that can quickly find the location where an electrical abnormality occurs through several inspection points on the circuit.

本創作的又一目的是提供一種漏電偵測裝置,係可以發出警訊指示損壞區域或預警可能發生的危害。A further object of the present invention is to provide a leakage detecting device that can issue a warning to indicate a damaged area or an early warning of possible hazards.

本創作的再一目的是提供一種漏電偵測裝置,感測端與數據處理端係電氣隔離,係可以避免產生電磁干擾影響偵測結果。A further object of the present invention is to provide a leakage detecting device, wherein the sensing end is electrically isolated from the data processing end to prevent electromagnetic interference from affecting the detection result.

本創作的漏電偵測裝置,包含:複數隔離感測單元,各該隔離感測單元具有一光發射源及一光接收器;複數偵測迴路,各該偵測迴路具有一偵測端及一中性端,該偵測端電性連接該光發射源的正極及一受保護電路之一檢驗點,該中性端電性連接該光發射源的負極;複數訊號迴路,各該訊號迴路具有一訊號電源、一輸出端及一接地端,該訊號電源電性連接該光接收器之一集極,該輸出端並聯該集極,該接地端電性連接該光接收器之一射極;及一處理單元,分別耦合連接各該訊號迴路之輸出端及一開關裝置,該開關裝置之二端係分別電性連接該受保護電路及一電源,各該隔離感測單元分別對應各該檢驗點產生一偵測訊號,該處理單元由該數筆偵測訊號產生一判斷結果,該處理單元依據該判斷結果控制該開關裝置之連通或斷路。The leakage detecting device of the present invention comprises: a plurality of isolated sensing units, each of the isolated sensing units has a light emitting source and a light receiver; and a plurality of detecting loops, each detecting loop has a detecting end and a detecting end a neutral end, the detecting end is electrically connected to the positive pole of the light emitting source and a check point of a protected circuit, the neutral end is electrically connected to the negative pole of the light emitting source; the complex signal loop, each of the signal loops has a signal power supply, an output end and a ground end, the signal power supply is electrically connected to one of the collectors of the optical receiver, the output end is connected in parallel with the collector, and the ground end is electrically connected to one of the emitters of the optical receiver; And a processing unit, respectively coupled to the output end of each of the signal loops and a switch device, wherein the two ends of the switch device are electrically connected to the protected circuit and a power source, and each of the isolation sensing units respectively corresponds to the test The processing unit generates a detection signal, and the processing unit generates a determination result by the plurality of detection signals, and the processing unit controls the connection or disconnection of the switching device according to the determination result.

據此,本創作的漏電偵測裝置,係以數個隔離感測單元分別偵測該受保護電路之不同部位,藉由產生強弱不同之偵測訊號,可以得知電路中不同段的電性特徵,如此,該處理單元比對及分析該數筆偵測訊號,係可以提升判定電路功能異常的準確性並快速找出問題點,係具有避免誤判及提升維修效率的功效。Accordingly, the leakage detecting device of the present invention detects the different parts of the protected circuit by using a plurality of isolated sensing units, and can detect the electrical properties of different segments in the circuit by generating different detecting signals with different strengths and weaknesses. The feature, in this way, the processing unit compares and analyzes the digital detection signal, which can improve the accuracy of the determination circuit function abnormality and quickly find the problem point, and has the effect of avoiding false positives and improving maintenance efficiency.

其中,該隔離感測單元之該光發射源與該光接收器之間具有一電氣隔離之光通道。如此,該光通道係可以阻隔電磁干擾,同時保持光訊號的傳遞通暢,具有提升訊號傳遞精確度的功效。Wherein, the light emitting source of the isolation sensing unit and the light receiver have an electrically isolated optical channel. In this way, the optical channel can block electromagnetic interference, while maintaining the smooth transmission of the optical signal, and has the effect of improving the accuracy of signal transmission.

其中,各該偵測迴路係共用該中性端。如此,各該偵測端與同一電位作比較,具有使光訊號之強弱正確反應電性特徵之變化的功效。Each of the detection loops shares the neutral end. In this way, each of the detecting ends is compared with the same potential, and has the effect of correctly changing the electrical characteristics of the optical signal.

其中,該偵測端與該光發射源之間具有一分壓單元。如此,該分壓單元係可以降低作用於該光發射源的電壓,具有避免偏壓過大導致該光發射源損壞的功效。Wherein, the detecting end and the light emitting source have a voltage dividing unit. In this way, the voltage dividing unit can reduce the voltage applied to the light emitting source, and has the effect of avoiding excessive biasing and causing damage to the light emitting source.

其中,該中性端與該光發射源之間串聯一導流單元。如此,該導流單元係可以防止電流逆向進入該光發射源,具有確保光發射源正確運作的功效。Wherein, a guiding unit is connected in series between the neutral end and the light emitting source. In this way, the flow guiding unit can prevent the current from being reversely entered into the light emitting source, and has the effect of ensuring the correct operation of the light emitting source.

其中,該訊號電源係電氣隔離於該受保護電路。如此,該偵測迴路絕緣於該訊號迴路,具有避免偵測訊號受電磁干擾的功效。The signal power source is electrically isolated from the protected circuit. In this way, the detection circuit is insulated from the signal loop, and has the effect of avoiding electromagnetic interference of the detection signal.

其中,該訊號迴路之該接地端係電氣隔離於該偵測迴路之中性端。如此,該偵測迴路絕緣於該訊號迴路,具有避免偵測訊號受電磁干擾的功效。The ground of the signal loop is electrically isolated from the neutral end of the detection loop. In this way, the detection circuit is insulated from the signal loop, and has the effect of avoiding electromagnetic interference of the detection signal.

其中,該檢驗點係位於該受保護電路之節點。如此,係可以比較電路不同階段的電性參數,具有提升判斷電路功能異常準確度的功效。Wherein, the checkpoint is located at a node of the protected circuit. In this way, it is possible to compare electrical parameters at different stages of the circuit, and to improve the accuracy of the function of the judgment circuit.

其中,該檢驗點位於該受保護電路之一外裝保護殼。如此,電路與保護殼之間發生短路能夠即時發現,具有漏電防護的功效。Wherein, the checkpoint is located outside the protective casing of one of the protected circuits. In this way, a short circuit between the circuit and the protective case can be immediately found, and has the effect of leakage protection.

本創作另包含至少一警示單元,各該警示單元耦合連接該處理單元,該處理單元依據該判斷結果啟動該警示單元。如此,具有提醒使用者注意該電路使用狀態的功效。The present invention further includes at least one alert unit, each of the alert units is coupled to the processing unit, and the processing unit activates the alert unit according to the determination result. In this way, it has the effect of reminding the user to pay attention to the state of use of the circuit.

為讓本創作之上述及其他目的、特徵及優點能更明顯易懂,下文特舉本創作之較佳實施例,並配合所附圖式,作詳細說明如下:In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

請參照第1圖所示,其係本創作漏電偵測裝置的較佳實施例,係包含複數隔離感測單元1、複數偵測迴路2、複數訊號迴路3及一處理單元4,各該隔離感測單元1之一端與一該偵測迴路2串聯,該隔離感測單元1之另一端與一該訊號迴路3串聯,該訊號迴路3耦合連接該處理單元4。Referring to FIG. 1 , a preferred embodiment of the present invention relates to a plurality of isolated sensing units, a plurality of detecting circuits 2, a plurality of signal circuits 3 and a processing unit 4, each of which is isolated. One end of the sensing unit 1 is connected in series with a detection circuit 2, and the other end of the isolation sensing unit 1 is connected in series with a signal circuit 3, and the signal circuit 3 is coupled to the processing unit 4.

該隔離感測單元1可以是光耦合器,具有一光發射源11及一光接收器12,該光發射源11可以是發光二極體,如此,通過該光發射源11之電流大小與其發光強度成正比;該光接收器12可以是光敏電阻、光電晶體或可控矽整流器(Silicon Controlled Rectifier, SCR)等可以將光轉換為電能量之元件,在本實施例中,該光接收器12還包括一電晶體,如此,該光發射源11發出之一光訊號,經由該光接收器12轉換為一電訊號,還可以藉由該電晶體放大該電訊號;另外,該光發射源11與該光接收器12之間較佳具有一電氣隔離之光通道13,如此,係可以阻隔該光發射源11與該光接收器12之間的電磁干擾,同時保持光訊號的傳遞通暢。The isolation sensing unit 1 may be an optical coupler having a light emitting source 11 and a light receiver 12, and the light emitting source 11 may be a light emitting diode, and thus, the current passing through the light emitting source 11 and its light emitting The intensity of the light receiver 12 can be a photosensitive resistor, a photoelectric crystal or a controllable sigma rectifier (SCR), etc., which can convert light into electrical energy. In this embodiment, the light receiver 12 The optical source 11 also emits an optical signal, which is converted into an electrical signal by the optical receiver 12, and the electrical signal can be amplified by the transistor; in addition, the optical emission source 11 Preferably, the optical receiver 13 is electrically isolated from the optical receiver 12 so as to block electromagnetic interference between the optical source 11 and the optical receiver 12 while maintaining the smooth transmission of the optical signal.

該偵測迴路2具有一偵測端21及一中性端22,該偵測端21電性連接該隔離感測單元1之該光發射源11的正極,將該偵測端21電性連接一受保護電路E之一檢驗點T,係可以使該檢驗點T之電壓順向作用於該光發射源11;該中性端22電性連接該光發射源11的負極,該中性端22較佳為零電位,在本實施例中,各該偵測迴路2係共用該中性端22;另外,該偵測端21與該光發射源11之間較佳具有一分壓單元23,該分壓單元23可以是電阻,且其電阻值大小可以依據該檢驗點T之電壓大小作更換或調整,該分壓單元23係可以降低作用於該光發射源11的電壓,以避免偏壓過大導致該光發射源11損壞,又,該中性端22與該光發射源11之間較佳串聯一導流單元24,該導流單元24可以是整流二極體,該導流單元24係可以防止電流由該中性端22或其它偵測迴路2逆向進入該光發射源11。The detecting circuit 2 has a detecting end 21 and a neutral end 22, and the detecting end 21 is electrically connected to the anode of the light emitting source 11 of the isolating sensing unit 1, and the detecting end 21 is electrically connected. a checkpoint T of one of the protected circuits E, the voltage of the checkpoint T can be applied to the light emitting source 11 in the forward direction; the neutral end 22 is electrically connected to the negative pole of the light emitting source 11, the neutral end 22 is preferably a zero potential. In this embodiment, each of the detection circuits 2 shares the neutral end 22; in addition, the detection end 21 and the light emitting source 11 preferably have a voltage dividing unit 23 The voltage dividing unit 23 can be a resistor, and the magnitude of the resistance value can be replaced or adjusted according to the voltage of the check point T. The voltage dividing unit 23 can reduce the voltage applied to the light emitting source 11 to avoid bias. If the pressure is too large, the light emitting source 11 is damaged. Further, a flow guiding unit 24 is preferably connected in series between the neutral end 22 and the light emitting source 11. The guiding unit 24 may be a rectifying diode, and the guiding unit is The 24 Series prevents current from being reversely entered by the neutral terminal 22 or other detection loop 2 into the light emitting source 11.

該訊號迴路3具有一訊號電源31、一輸出端32及一接地端33,該訊號電源31電性連接該隔離感測單元1之該光接收器12的電晶體集極,該訊號電源31較佳電氣隔離該受保護電路E,該輸出端32並聯該電晶體集極,該接地端33電性連接該光接收器12的電晶體射極,該接地端33係電氣隔離該偵測迴路2之中性端22,如此,經由該光接收器12轉換、放大之偵測訊號,係可以由該輸出端32輸出。The signal circuit 3 has a signal power source 31, an output terminal 32 and a ground terminal 33. The signal power source 31 is electrically connected to the transistor collector of the light receiver 12 of the isolation sensing unit 1, and the signal power source 31 is compared. The electrical circuit is isolated from the protected circuit E. The output terminal 32 is connected in parallel with the transistor collector. The grounding terminal 33 is electrically connected to the transistor emitter of the optical receiver 12. The grounding terminal 33 electrically isolates the detecting circuit 2 The neutral terminal 22, as such, the detection signal converted and amplified by the optical receiver 12 can be outputted by the output terminal 32.

該處理單元4分別耦合連接各該訊號迴路3之輸出端32及一開關裝置S,該處理單元4藉由該數個訊號迴路3接收數筆偵測訊號,該處理單元4記錄及分析該數筆偵測訊號而產生一判斷結果,該處理單元4依據該判斷結果係可以控制該開關裝置S之連通或斷路,該開關裝置S之二端係分別電性連接該受保護電路E及一電源P,當該開關裝置S連通時,該電源P可以提供該受保護電路E正常運作之電能,當處理單元4切換該開關裝置S為斷路時,係可以截止進入該受保護電路E之電流。The processing unit 4 is coupled to the output terminal 32 of each of the signal circuits 3 and a switching device S. The processing unit 4 receives a plurality of detection signals by the plurality of signal circuits 3, and the processing unit 4 records and analyzes the number. The detection signal is generated by the pen detection signal, and the processing unit 4 can control the communication or disconnection of the switch device S according to the determination result. The two ends of the switch device S are electrically connected to the protected circuit E and a power source respectively. P, when the switching device S is connected, the power source P can provide the normal operation power of the protected circuit E. When the processing unit 4 switches the switching device S to be open, the current entering the protected circuit E can be cut off.

另外,該處理單元4還可以耦合連接至少一警示單元5,該警示單元5係可以是信號燈或蜂鳴器等可以發出聲音或閃光之裝置,該處理單元4係可以依據該判斷結果啟動該警示單元5,以提醒使用者注意該受保護電路E之使用狀態。In addition, the processing unit 4 can also be coupled to the at least one alert unit 5, which can be a device such as a signal light or a buzzer that can emit sound or flash, and the processing unit 4 can activate the alert according to the determination result. Unit 5 is to remind the user of the state of use of the protected circuit E.

據由前述結構,該受保護電路E之各該檢驗點T的正向偏壓,係可以使該隔離感測單元1之該光發射源11產生強弱不同之光訊號,其中,該檢驗點T係位於該受保護電路E之任意節點,當電路功能正常時,各該節點的電壓及電流係維持穩定或呈規律變化,各該隔離感測單元1係可以產生對應的偵測訊號,由該處理單元4依據該偵測訊號判斷該受保護電路E係正常運作;當電路發生短路、過載或漏電等狀況時,各該節點的電壓及電流相較於電路正常時係發生變化,如此,藉由比較該數筆偵測訊號相對電路正常時的偵測訊號之變化,該處理單元4係可以判斷該受保護電路E異常的嚴重程度、是否造成立即性危害,並下達指令由該開關裝置S緊急斷電,或由該警示單元5發出預警。According to the foregoing structure, the forward bias of each of the checkpoints T of the protected circuit E can cause the light emitting source 11 of the isolation sensing unit 1 to generate light signals having different strengths and weaknesses, wherein the checkpoint T It is located at any node of the protected circuit E. When the circuit function is normal, the voltage and current of each node are stable or regularly changed. Each of the isolation sensing units 1 can generate a corresponding detection signal. The processing unit 4 determines that the protected circuit E is in normal operation according to the detection signal; when the circuit is short-circuited, overloaded or leaked, the voltage and current of each node change compared with the normal circuit, so By comparing the change of the detection signal of the digital detection signal with respect to the normal circuit, the processing unit 4 can determine the severity of the abnormality of the protected circuit E, whether it causes an immediate hazard, and issue the command by the switch device S. An emergency power failure or an alert is issued by the warning unit 5.

該檢驗點T還可以位於該受保護電路E之外裝保護殼C,其中,該外裝保護殼C僅用於防潮、防碰撞,係與內部電路無電性連接,因此,當電路正常運作時,零偏壓位於該光發射源11而無光訊號產生,反之,當該受保護電路E與該外裝保護殼C之間的絕緣劣化而導致漏電時,該檢驗點T之電位升高致使該光發射源11發出光訊號,且該光訊號之強度正比於漏電的嚴重程度,如此,該處理單元4係可以依據偵測訊號的強弱,判斷漏電狀況是否影響工作效率或造成工安意外而需要立即斷電,若漏電狀況輕微係可以由該警示單元5發出警訊,並待工作完成後再進行斷電檢修。The checkpoint T can also be located outside the protected circuit E with a protective case C, wherein the outer protective case C is only used for moisture-proof and anti-collision, and is electrically connected to the internal circuit, so when the circuit is in normal operation The zero bias voltage is located at the light emitting source 11 and no optical signal is generated. Conversely, when the insulation between the protected circuit E and the outer protective case C is deteriorated to cause electric leakage, the potential of the check point T rises. The light emitting source 11 emits an optical signal, and the intensity of the optical signal is proportional to the severity of the leakage. Thus, the processing unit 4 can determine whether the leakage condition affects the working efficiency or causes an accident due to the strength of the detecting signal. It is necessary to immediately turn off the power. If the leakage condition is slight, the warning unit 5 can issue a warning, and then the power is turned off after the work is completed.

又,該數個檢驗點T係分別位於不同之節點,該數個隔離感測單元1產生的數筆偵測訊號係可以對應不同電路段落的工作表現,由該處理單元4綜合比較該數筆偵測訊號之間的差異,該處理單元4係可以找出電路中嚴重電性異常的段落,更進一步判定電路損壞或漏電之部位,並由對應之該警示單元5指示發生電性異常的區域,方便使用者快速找到問題點並進行維修更換。Moreover, the plurality of checkpoints T are respectively located at different nodes, and the plurality of detected signals generated by the plurality of isolated sensing units 1 can correspond to the performance of different circuit segments, and the processing unit 4 comprehensively compares the pens Detecting the difference between the signals, the processing unit 4 can find a paragraph of serious electrical abnormality in the circuit, further determine the location of the circuit damage or leakage, and indicate the area where the electrical abnormality occurs by the corresponding warning unit 5. It is convenient for users to quickly find the problem and repair and replace it.

綜上所述,本創作的漏電偵測裝置,係以數個隔離感測單元分別偵測該受保護電路之不同節點,藉由產生強弱不同之偵測訊號,可以得知各該節點的電性特徵,如此,該處理單元比對及分析該數筆偵測訊號,係可以提升判定電路功能異常的準確性並快速找出問題點,具有避免誤判及提升維修效率的功效。In summary, the leakage detecting device of the present invention detects the different nodes of the protected circuit by using a plurality of isolated sensing units, and can generate the power of each node by generating different detecting signals with different strengths and weaknesses. Sexual characteristics, in this way, the processing unit compares and analyzes the digital detection signals, which can improve the accuracy of the determination circuit function abnormality and quickly find the problem point, and has the effects of avoiding false positives and improving maintenance efficiency.

雖然本創作已利用上述較佳實施例揭示,然其並非用以限定本創作,任何熟習此技藝者在不脫離本創作之精神和範圍之內,相對上述實施例進行各種更動與修改仍屬本創作所保護之技術範疇,因此本創作之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed by the above-described preferred embodiments, it is not intended to limit the present invention, and it is still within the spirit and scope of the present invention to make various changes and modifications to the above embodiments. The technical scope of the protection is created, so the scope of protection of this creation is subject to the definition of the patent application scope attached.

1‧‧‧隔離感測單元1‧‧‧Isolation sensing unit

11‧‧‧光發射源 11‧‧‧Light source

12‧‧‧光接收器 12‧‧‧Light Receiver

13‧‧‧光通道 13‧‧‧Light channel

2‧‧‧偵測迴路 2‧‧‧Detection loop

21‧‧‧偵測端 21‧‧‧Detection

22‧‧‧中性端 22‧‧‧Neutral end

23‧‧‧分壓單元 23‧‧‧Dividing unit

24‧‧‧導流單元 24‧‧‧Guide unit

3‧‧‧訊號迴路 3‧‧‧ Signal loop

31‧‧‧訊號電源 31‧‧‧ Signal Power Supply

32‧‧‧輸出端 32‧‧‧ Output

33‧‧‧接地端 33‧‧‧ Grounding terminal

4‧‧‧處理單元 4‧‧‧Processing unit

5‧‧‧警示單元 5‧‧‧Warning unit

E‧‧‧受保護電路 E‧‧‧protected circuit

T‧‧‧檢驗點 T‧‧‧ checkpoint

S‧‧‧開關裝置 S‧‧‧ Switching device

P‧‧‧電源 P‧‧‧Power supply

C‧‧‧外裝保護殼 C‧‧‧Outer protective case

[第1圖] 本創作一較佳實施例的系統電路圖。[FIG. 1] A system circuit diagram of a preferred embodiment of the present invention.

Claims (10)

一種漏電偵測裝置,包含: 複數隔離感測單元,各該隔離感測單元具有一光發射源及一光接收器; 複數偵測迴路,各該偵測迴路具有一偵測端及一中性端,該偵測端電性連接該光發射源的正極及一受保護電路之一檢驗點,該中性端電性連接該光發射源的負極; 複數訊號迴路,各該訊號迴路具有一訊號電源、一輸出端及一接地端,該訊號電源電性連接該光接收器之一集極,該輸出端並聯該集極,該接地端電性連接該光接收器之一射極;及 一處理單元,分別耦合連接各該訊號迴路之輸出端及一開關裝置,該開關裝置之二端係分別電性連接該受保護電路及一電源,各該隔離感測單元分別對應各該檢驗點產生一偵測訊號,該處理單元由該數筆偵測訊號產生一判斷結果,該處理單元依據該判斷結果控制該開關裝置之連通或斷路。A leakage detecting device includes: a plurality of isolated sensing units, each of the isolated sensing units having a light emitting source and an optical receiver; a plurality of detecting loops, each detecting loop having a detecting end and a neutral The detecting end is electrically connected to the positive pole of the light emitting source and a check point of a protected circuit, the neutral end is electrically connected to the negative pole of the light emitting source; the complex signal loop, each signal loop has a signal a power supply, an output end and a ground end, the signal power supply is electrically connected to one of the collectors of the optical receiver, the output end is connected in parallel with the collector, the ground end is electrically connected to one of the emitters of the optical receiver; The processing unit is respectively coupled to the output end of each of the signal loops and a switch device. The two ends of the switch device are respectively electrically connected to the protected circuit and a power source, and each of the isolation sensing units is respectively generated corresponding to each of the check points. a detection signal, the processing unit generates a determination result by the plurality of detection signals, and the processing unit controls the connection or disconnection of the switching device according to the determination result. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該隔離感測單元之該光發射源與該光接收器之間具有一電氣隔離之光通道。The leakage detecting device of claim 1, wherein the optical transmitting source of the isolation sensing unit and the optical receiver have an electrically isolated optical channel. 如申請專利範圍第1項所述之漏電偵測裝置,其中,各該偵測迴路係共用該中性端。The leakage detecting device of claim 1, wherein each of the detecting circuits shares the neutral end. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該偵測端與該光發射源之間具有一分壓單元。The leakage detecting device of claim 1, wherein the detecting end and the light emitting source have a voltage dividing unit. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該中性端與該光發射源之間串聯一導流單元。The leakage detecting device of claim 1, wherein a flow guiding unit is connected in series between the neutral end and the light emitting source. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該訊號電源係電氣隔離於該受保護電路。The leakage detecting device of claim 1, wherein the signal power source is electrically isolated from the protected circuit. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該訊號迴路之該接地端係電氣隔離於該偵測迴路之中性端。The leakage detecting device of claim 1, wherein the grounding end of the signal circuit is electrically isolated from the neutral end of the detecting circuit. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該檢驗點係位於該受保護電路之節點。The leakage detecting device of claim 1, wherein the checkpoint is located at a node of the protected circuit. 如申請專利範圍第1項所述之漏電偵測裝置,其中,該檢驗點位於該受保護電路之一外裝保護殼。The leakage detecting device of claim 1, wherein the checkpoint is located outside one of the protected circuits. 如申請專利範圍第1至9項中任一項所述之漏電偵測裝置,另包含至少一警示單元,各該警示單元耦合連接該處理單元,該處理單元依據該判斷結果啟動該警示單元。The leakage detecting device according to any one of claims 1 to 9, further comprising at least one warning unit, each of the warning units being coupled to the processing unit, the processing unit starting the warning unit according to the determination result.
TW107214418U 2018-10-24 2018-10-24 Leakage current detecting device TWM573431U (en)

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