JP2006023281A - Electricity-stealing sensing method and integrating wattmeter - Google Patents

Electricity-stealing sensing method and integrating wattmeter Download PDF

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JP2006023281A
JP2006023281A JP2005143940A JP2005143940A JP2006023281A JP 2006023281 A JP2006023281 A JP 2006023281A JP 2005143940 A JP2005143940 A JP 2005143940A JP 2005143940 A JP2005143940 A JP 2005143940A JP 2006023281 A JP2006023281 A JP 2006023281A
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clamp fitting
line ring
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JP4429206B2 (en
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Yoshio Inoue
良夫 井上
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<P>PROBLEM TO BE SOLVED: To inexpensively prevent electricity stealing without taking time. <P>SOLUTION: A notifying device 10 lighting in potential differences between terminals a and 7a, and c and 7c is attached to the connection terminals a and 7a and c and 7c between a current line ring and voltage line ring input short-circuited with a clamp fitting 8 of an induction type integrating wattmeter. When removing the clamp fitting 8, circuit voltage is not supplied to the voltage line ring 2 short-circuited with the clamp fitting 8, a potential difference is generated between input terminals a and c and auxiliary terminals 7a and 7c and current flows to the notifying device 10 to be lighted. The lighting can be found during checking a pointer since it continues while removing the clamp fitting 8. Electricity stealing can be prevented simply and inexpensively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、盗電防止を図れるようにした誘導型積算電力計に関するものである。   The present invention relates to an inductive power meter that can prevent theft of electricity.

一般家庭や事業所などに設置される電力量を計量する交流電力計の多くは誘導型の積算電力計である。   Many of the AC wattmeters that measure the amount of power installed in ordinary households and business establishments are inductive integrating wattmeters.

この誘導型の積算電力計は、例えば、図１０に示すように、アルミ円板１の上下に電圧線輪２と電流線輪３を配置したもので、前記電圧線輪２に回路電圧を印加して、電流線輪３には負荷電流を流すことで、両線輪２、３が作る移動磁界により、アルミ円板１に電流を誘起させ、その誘起した電流と移動磁界との電磁作用によって移動磁界の方向へ回転するアルミ円板１の回転数を計量メーター５で表示させるようにしたものである。   For example, as shown in FIG. 10, this induction type integrating wattmeter has a voltage line ring 2 and a current line ring 3 arranged above and below an aluminum disk 1, and applies a circuit voltage to the voltage line ring 2. Then, by passing a load current through the current wire ring 3, a current is induced in the aluminum disk 1 by the moving magnetic field generated by the two wire rings 2 and 3, and the electromagnetic action between the induced current and the moving magnetic field is induced. The rotational speed of the aluminum disk 1 rotating in the direction of the moving magnetic field is displayed on the weighing meter 5.

すなわち、図１０のように、電力計の端子ボックス４の一方の入力端子ａを一方の出力端子ａ’と電流線輪３を介して接続して、他方の入力端子ｂを、他方の出力端子ｂ’と接続し、かつ、前記一方の入力端子ａと並行に補助端子７を設けて、その補助端子７を電圧線輪２を介して他方の出力端子ｂ’と接続するとともに、その電圧線輪２と接続した補助端子７をクランプ金具８でもって一方の入力端子ａと接続する（検定試験の際に、電圧線輪２を分離できるようにしている）ことにより、補助端子７から電圧線輪２へ電圧を印加するようにしている。   That is, as shown in FIG. 10, one input terminal a of the wattmeter terminal box 4 is connected to one output terminal a ′ through the current wire ring 3 and the other input terminal b is connected to the other output terminal. b 'and an auxiliary terminal 7 is provided in parallel with the one input terminal a, and the auxiliary terminal 7 is connected to the other output terminal b' via the voltage ring 2, and the voltage line By connecting the auxiliary terminal 7 connected to the ring 2 to one input terminal a with the clamp fitting 8 (so that the voltage line ring 2 can be separated during the verification test), the voltage line from the auxiliary terminal 7 is obtained. A voltage is applied to the wheel 2.

そのため、メーターケース９に封印をして不正な行為ができないようにしているが、補助端子７を設けた端子ボックス４は、検定時にカバーを外してアクセスできるようにネジ止めとなっており、カバーを外してクランプ金具８を外せば（例えば、補助端子７からスライドさせて外せば）計量を止めた状態で負荷側に電力を供給（盗電）できる（ちなみに、毎月クランプ金具を少しだけ戻して使用したようにすれば検針のときに円板１が回っていなくてもわからない）。   Therefore, the meter case 9 is sealed to prevent unauthorized actions, but the terminal box 4 provided with the auxiliary terminal 7 is screwed so that it can be accessed by removing the cover at the time of verification. If you remove the clamp and remove the clamp fitting 8 (for example, slide it off the auxiliary terminal 7), power can be supplied to the load side (power theft) with the metering stopped. If you do this, you won't know if the disc 1 is not turning at the time of meter reading).

この問題を解決するため、例えば、端子ボックスカ４の内側に突起を設け、その突起が外したクランプ金具８に当接してカバーを取り付けられないようにするものが考えられている。   In order to solve this problem, for example, it is considered that a protrusion is provided on the inner side of the terminal box cover 4 so that the cover cannot be attached by coming into contact with the clamp fitting 8 that has been removed.

ところが、前記ボックス４の突起を切断あるいは削れば、クランプ金具８を外した状態でもカバーを取り付けられるので抜本的な解決にならない問題がある。   However, if the projection of the box 4 is cut or scraped, the cover can be attached even when the clamp fitting 8 is removed, so that there is a problem that cannot be solved drastically.

そのため、その問題を解決する一つの方法として例えば、（特許文献１）には、メーターケース９にセンサーを取り付け、そのセンサーを通信回線と接続して、端子ボックス４のカバーを開けると、報知できるようにしたものが記載されている。
特開２００２−２５７８６２号公報 Therefore, as one method for solving the problem, for example, (Patent Document 1) can be notified by attaching a sensor to the meter case 9, connecting the sensor to a communication line, and opening the terminal box 4 cover. What was done is described.
JP 2002-257862 A

しかしながら、センサーを通信回線と接続したものでは、メーターケースを開けて工事をする場合は、例えば、予め工事の前にセンターへ通報して報知を無効にしたり、工事後は通報して有効にしたり、あるいは、それらを確認したりしなければならないので煩雑で手間のかかる問題がある。また、このように煩雑なので、ついうっかり有効にするのを忘れてしまうなどの問題がある。   However, if the sensor is connected to a communication line and the work is done with the meter case open, for example, the center will be notified in advance prior to the construction, and the notification will be disabled, or the construction will be enabled by notification. Or, there is a troublesome and time-consuming problem because it is necessary to confirm them. In addition, since it is complicated, there is a problem such as forgetting to enable it.

また、通信回線を準備したり、センサーを設けたケースを準備したりとコストが高くつくので、高いコストに見合う所にしか設置できない問題がある。   In addition, there is a problem that it can only be installed at a location that meets the high cost because it is expensive to prepare a communication line or a case with a sensor.

そこで、この発明の課題は、手間がかからず、低コストで盗電を防止できるようにすることである。   Accordingly, an object of the present invention is to be able to prevent power theft at a low cost without taking time and effort.

上記の課題を解決するため、この発明では、クランプ金具で短絡される積算電力計の電流線輪と電圧線輪端子間の電位差に基づいて盗電を検出するという方法を採用したのである。   In order to solve the above problems, the present invention employs a method of detecting theft based on the potential difference between the current line ring and the voltage line ring terminal of the integrating wattmeter short-circuited by the clamp fitting.

このような構成を採用することにより、クランプ金具を外した際に短絡されていた電流線輪と電圧線輪の入力間に生じる電位差、あるいは、クランプ金具を外したことで通電されなくなって消失した電位差を検出して報知することにより簡単に盗電を検出できる。   By adopting such a configuration, the potential difference generated between the input of the current line ring and the voltage line ring that was short-circuited when the clamp fitting was removed, or disappeared due to the removal of the clamp fitting and no current supply. Theft can be easily detected by detecting and notifying the potential difference.

また、積算電力計に電源側のクランプ金具で短絡される電流線輪と電圧線輪端子間の電位差に基づいて報知を行う報知手段を備えた構成を採用することができる。   Moreover, the structure provided with the alerting | reporting means which alert | reports based on the electric potential difference between the current line ring and voltage line ring terminal which are short-circuited to the integrating | accumulating wattmeter with the clamp fitting by the side of a power supply is employable.

このような構成を採用することにより、報知手段の組み込まれた電力計は、クランプ金具を外すと、報知手段が電流線輪と電圧線輪の入力間に生じる電位差に基づいて盗電を報知する。   By adopting such a configuration, when the wattmeter in which the notification means is incorporated removes the clamp fitting, the notification means notifies of theft based on the potential difference generated between the input of the current line ring and the voltage line ring.

この発明は、以上のように構成したことにより、不正行為が行われた際に、それを報知することができるので、盗電を防止できる。   Since the present invention is configured as described above, it is possible to notify when an illegal act is performed, and thus it is possible to prevent theft.

また、その際クランプ金具を外した際の電流線輪と電圧線輪の電位差で報知を行うようにして簡単な回路で構成できるようにしたので手間がかからず低コストで盗電を防止できる。   Further, at this time, since a notification can be made based on the potential difference between the current wire ring and the voltage wire ring when the clamp fitting is removed, a simple circuit can be used, so that it is possible to prevent theft of electricity at low cost.

以下、この発明の最良の形態を図面に基づいて説明する。   The best mode of the present invention will be described below with reference to the drawings.

図１に示すものは、単相１００Ｖ三線式の誘導型積算電力計に、本願の検出方法を適用した報知装置（報知手段）を備えたものである。   What is shown in FIG. 1 is provided with a notification device (notification means) in which the detection method of the present application is applied to a single-phase 100V three-wire inductive integrating wattmeter.

単相１００Ｖ 三線式の誘導型積算電力計は、単相計器（図１０参照）を２個組合せ、計量メーター５、メーターケース９、端子ボックス４を共通にしたもので、端子ボックス４には、図１に示すように、入力側（ＩＮ、電源側）に、ａ、ｂ（中性点）、ｃの三相の入力端子が設けられ、出力側（ＯＵＴ、負荷側）には、ａ’、ｂ’（中性点）、ｃ’の三相の出力端子が設けられており、その入力側のａ−ｂ相間とｂ−ｃ相間に、それぞれ補助端子７ａ、７ｃが設けられている。   The single-phase 100V three-wire inductive integrating wattmeter is a combination of two single-phase meters (see FIG. 10) and a common metering meter 5, meter case 9, and terminal box 4. As shown in FIG. 1, three-phase input terminals a, b (neutral point), and c are provided on the input side (IN, power supply side), and a ′ is provided on the output side (OUT, load side). , B ′ (neutral point) and c ′ are provided, and auxiliary terminals 7a and 7c are provided between the ab phase and the bc phase on the input side, respectively.

補助端子７ａ、７ｃは、それぞれ、電圧線輪２に接続されており、電圧線輪２を介して出力側のｂ’端子に接続されている。   The auxiliary terminals 7 a and 7 c are each connected to the voltage line ring 2, and are connected to the b ′ terminal on the output side via the voltage line ring 2.

また、入力側のａ、ｃ端子は、それぞれ、電流線輪３を介して出力側のａ’、ｃ’端子と接続されている。   Further, the a and c terminals on the input side are connected to the a ′ and c ′ terminals on the output side via the current wire ring 3, respectively.

報知装置１０は、図２に示すように、この形態では、入力端子ａと補助端子７ａとの接続端子１１ａを備えたネオン管１２ａと、入力端子ｃと補助端子７ｃとのとの接続端子１１ｃを備えたネオン管１２ｃとからなるもので、２個のネオン管１２ａと１２ｃには点灯回路として電流制限抵抗を内蔵し、１００Ｖ で点灯できるようにしたものを使用している。   As shown in FIG. 2, in this form, the notification device 10 includes a neon tube 12a having a connection terminal 11a between the input terminal a and the auxiliary terminal 7a, and a connection terminal 11c between the input terminal c and the auxiliary terminal 7c. The two neon tubes 12a and 12c use current limiting resistors as lighting circuits so that they can be lit at 100V.

そして、この接続端子１１ａ、１１ｃ付の２個のネオン管１２ａ、１２ｃをコの字型の金具１３の両端に取付け、図２のように計量メーター５のパネル上部のネジ孔にネジ止めできるようにしてある。   Then, the two neon tubes 12a and 12c with the connection terminals 11a and 11c are attached to both ends of the U-shaped metal fitting 13 so that they can be screwed into the screw holes at the upper part of the meter meter 5 panel as shown in FIG. It is.

その際、ネオン管１２ａ、１２ｃを取り付けた金具１３の寸法は、積算電力計のメーターケース９内の空きスペースに収まるように形成してある。   In that case, the dimension of the metal fitting 13 to which the neon tubes 12a and 12c are attached is formed so as to fit in an empty space in the meter case 9 of the integrating wattmeter.

この形態は、上記のように構成され、報知装置１０は、メーターケース９を開け、計量メーター５のパネルの上部にネジ止めしたのち、それぞれの接続端子１１ａ、１１ｃをメーターケース９内で、入力端子ａと補助端子７ａ及び入力端子ｃと補助端子７ｃにネジ止めする。その後、検定試験（ＲＣ法）を受けて合格すれば、ケースを閉じて封印する。   This configuration is configured as described above, and the alarm device 10 opens the meter case 9 and screws it to the upper part of the panel of the metering meter 5, and then inputs the respective connection terminals 11 a and 11 c in the meter case 9. The terminal a and the auxiliary terminal 7a and the input terminal c and the auxiliary terminal 7c are screwed. After that, if it passes the certification test (RC method), the case is closed and sealed.

この状態で、設置（電源と負荷に接続）することができる。すると、報知装置１０は、図１のようにクランプ金具８が接続されているので、電流線輪３と電圧線輪２の入力である入力端子ａと補助端子７ａと入力端子ｃと補助端子７ｃに電位差が生じず、通常は点灯しない。もし、点灯した場合は、クランプ金具８が外れていて電位差が生じているので、検定試験後にクランプ金具８を戻し忘れたことがチェックできる。このようにヒューマンエラーも防止できる。報知装置１０が点灯しない場合は、正常なので使用できる。   In this state, it can be installed (connected to a power source and a load). Then, since the alarm device 10 is connected to the clamp fitting 8 as shown in FIG. 1, the input terminal a, the auxiliary terminal 7a, the input terminal c, and the auxiliary terminal 7c, which are inputs of the current line ring 3 and the voltage line ring 2, are provided. There is no potential difference between them, and it does not light normally. If it is lit, it can be checked that the clamp fitting 8 has been forgotten to be returned after the verification test because the clamp fitting 8 has been detached and a potential difference has occurred. In this way, human error can also be prevented. If the notification device 10 is not lit, it can be used because it is normal.

この状態で、例えば端子ボックス４のカバーを開けてクランプ金具８を外すと、外したクランプ金具８に対応して電流線輪３と電圧線輪２の入力である入力端子ａと補助端子７ａ、あるいは入力端子ｃと補助端子７ｃのいずれか一方、あるいは両方に電位差が生じるためネオン管１２ａ、１２ｃに電流が流れて点灯する。この点灯はクランプ金具８を外して盗電している間中続くので検針時に見つけることが可能になる。そのため、盗電を見つけられないようするためには、何時行われるかわからない検針時にクランプ金具８を戻しておかなければならないので盗電が難しくなり、盗電を防止できる。このように簡単な回路で、盗電を防止できるのでローコストである。   In this state, for example, when the cover of the terminal box 4 is opened and the clamp fitting 8 is removed, the input terminal a and the auxiliary terminal 7a, which are inputs of the current line ring 3 and the voltage line ring 2, corresponding to the removed clamp fitting 8, Alternatively, since a potential difference is generated in one or both of the input terminal c and the auxiliary terminal 7c, a current flows through the neon tubes 12a and 12c, and the light is lit. Since this lighting continues throughout the removal of the clamp fitting 8 and stealing electricity, it can be detected at the time of meter reading. Therefore, in order not to find theft, it is difficult to steal because the clamp fitting 8 must be returned at the time of meter reading when it is unknown. Such a simple circuit can prevent power theft and is low cost.

この実施例は、報知装置１０が常時点灯していて異常が発生したときに消灯するようにしたもので、図３のように電圧線輪２への線路に抵抗２０、２０’を設けて、その抵抗２０、２０’の両端に報知装置（この形態では、ＬＥＤ２１、２１’による点灯回路と接続端子）１０を接続したものである。このようにすると、クランプ金具８が正常に接続されていると、電流が流れてＬＥＤ２１、２１’が点灯する。一方、クランプ金具８が外されると、電流が流れないので、ＬＥＤ２１、２１’は消灯する。   In this embodiment, the notification device 10 is always turned on and is turned off when an abnormality occurs. As shown in FIG. 3, resistors 20 and 20 ′ are provided on the line to the voltage line ring 2, A notification device (in this embodiment, a lighting circuit and connection terminals by LEDs 21 and 21 ′) 10 is connected to both ends of the resistors 20 and 20 ′. In this way, when the clamp fitting 8 is normally connected, current flows and the LEDs 21 and 21 'are lit. On the other hand, when the clamp fitting 8 is removed, no current flows, so the LEDs 21 and 21 'are turned off.

ここでＬＥＤ２１、２１’は、ネオン管１２ａ、１２ｃに代えて用いるようにしたもので、図３のように、電流制限抵抗２２、２２’と逆流防止用ダイオード２３、２３’を備えている 他の構成及び作用効果については、先の形態と同じなので説明は省略する。   Here, the LEDs 21 and 21 'are used in place of the neon tubes 12a and 12c, and are provided with current limiting resistors 22 and 22' and backflow prevention diodes 23 and 23 'as shown in FIG. Since the configuration and operational effects of are the same as in the previous embodiment, description thereof will be omitted.

また、常時点灯の他の態様を図４に示す。この態様は、電圧線輪２に補助コイルｍを取り付けて報知装置１０へ電力を供給するようにしたもので、クランプ金具８を外した際に補助コイルｍに発生する電位差、すなわち、電圧線輪２への電力の供給が絶たれて補助コイルｍに発生する電位差が消失したことで消灯して報知を行うものである。他の構成及び作用効果については、前述のものと同じなので、説明は省略する。   Further, FIG. 4 shows another mode of constantly lighting. In this embodiment, the auxiliary coil m is attached to the voltage wire ring 2 to supply power to the notification device 10, and the potential difference generated in the auxiliary coil m when the clamp fitting 8 is removed, that is, the voltage wire ring. When the power supply to 2 is cut off and the potential difference generated in the auxiliary coil m disappears, the light is turned off and notification is made. Other configurations and operational effects are the same as those described above, and a description thereof will be omitted.

この実施例は、図５に示すように係合手段３０を設けて、例えばネオン管１２ａ、１２ｃあるいはＬＥＤ２１、ＬＥＤ２１’、報知装置１０を積算電力計のメーターケースの空きスペースに簡単に取り付けられるようにしたものである。   In this embodiment, as shown in FIG. 5, the engaging means 30 is provided so that, for example, the neon tubes 12a and 12c or the LED 21, LED 21 ′ and the notification device 10 can be easily attached to the empty space of the meter case of the integrating wattmeter. It is a thing.

すなわち、図５のものは、例えば、図２で示した金具１３の木ねじに代えて、金具１３の裏面に係合手段３０としてコの字型のホルダーをコの字形の開口を下にして設けたものである。前記コの字の開口は、ここでは、前記積算電力計のメーターの奥にあるダイカスト２９（図６参照）の幅に合わせてある。また、そのコの字の内側に波形に形成したバネ３１を対向させて取り付けてある。   That is, in FIG. 5, for example, instead of the wood screw of the metal fitting 13 shown in FIG. 2, a U-shaped holder is provided on the back surface of the metal fitting 13 as an engaging means 30 with the U-shaped opening facing down. It is a thing. Here, the U-shaped opening is matched to the width of the die cast 29 (see FIG. 6) located behind the meter of the integrating wattmeter. Moreover, the spring 31 formed in the waveform is attached facing the inside of the U-shape.

このように構成される報知装置１０は、図６のようにメーターケース９の前面の透明カバーを外し、前記電力計のダイカスト２９上部のメーターシャーシの空間に図６のようにすべり込ませるようにして嵌めると、前記ダイカスト２９にコの字形のホルダー３０が係合してワンタッチで取り付けられる。取り付けられた報知装置１０は、ホルダー３０のバネ３１によりシッカリと固定されるので両線輪２、３との接続を行えばよい。   As shown in FIG. 6, the alarm device 10 configured as described above removes the transparent cover on the front surface of the meter case 9 and slides it into the space of the meter chassis above the die cast 29 of the wattmeter as shown in FIG. When fitted, the U-shaped holder 30 is engaged with the die cast 29 and attached with one touch. Since the attached notification device 10 is firmly fixed by the spring 31 of the holder 30, it is only necessary to connect the two wire wheels 2 and 3.

このように、この報知装置１０は、ホルダー３０をダイカスト２９に嵌めるだけなので、検定試験調整済の機材に全く触れずに取り付けできる。ちなみに、取り外しも簡単にできるので、再使用も可能である。   As described above, the notification device 10 can be attached without touching the equipment that has been adjusted for the examination test because the holder 30 is simply fitted into the die cast 29. By the way, it can be easily removed and reused.

図７と図８は、他の態様を示すもので、図７のものは図５のホルダー３０の内側に設けたバネ３１に代えて止めネジを用いるものである。そのため、ここでは、ホルダーの開口の両サイドにネジ孔３２を設けてある。   FIG. 7 and FIG. 8 show another embodiment, and FIG. 7 uses a set screw instead of the spring 31 provided inside the holder 30 of FIG. Therefore, here, screw holes 32 are provided on both sides of the opening of the holder.

上記のように構成されるこの態様ではダイカスト２９にすべり込ませたのち（例えば図６のように）、前記ネジ孔３２に止めネジを嵌めてドライバーで締める。このとき、ドライバーを使わなくとも良いように、止めネジのネジ頭に滑り止めの溝を設けたキャップを有するものを採用して手締めができるようにしても良い。   In this embodiment configured as described above, after slipping into the die cast 29 (for example, as shown in FIG. 6), a set screw is fitted into the screw hole 32 and tightened with a screwdriver. At this time, in order not to use a screwdriver, a screw having a cap provided with a non-slip groove on the screw head of the set screw may be used to enable manual tightening.

図８は、金具１３をΠ形にして２本の並行なＬ形の係合手段３０を設け、その係合手段３０に貫通孔を設けて、積算電力計の本体を後方のメーターケースに止めるネジ止めを使って取り付けるようにしたものである。   FIG. 8 shows two parallel L-shaped engaging means 30 with the metal fitting 13 as a bowl shape, and a through hole is provided in the engaging means 30 so that the main body of the integrating wattmeter is fixed to the rear meter case. It is designed to be installed using screwing.

すなわち、メーターケースのネジ止めを外して、そのネジ止めにＬ形の貫通孔を合わせてネジ止めするというものである。   That is, the screwing of the meter case is removed, and the L-shaped through hole is aligned with the screwing and screwed.

なお、実施形態では、報知装置１０を積算電力計に後付（検定試験の前に）するものについて述べたが、これに限定されるものではなく、電力計の製造時に組み込むようにしてもよい。   In the embodiment, the alarming device 10 is retrofitted to the integrating wattmeter (before the verification test), but is not limited to this, and may be incorporated when the wattmeter is manufactured. .

また、報知手段に点灯回路を用いたものを示したが、これに限定されるものではなく、報知できるものであればどのような物でもよく点滅回路、あるいは音や音声などでもかまわない。   Moreover, although the thing using a lighting circuit was shown as an alerting | reporting means, it is not limited to this, What kind of thing may be sufficient as long as it can alert | report, and a blinking circuit or a sound, an audio | voice, etc. may be sufficient.

また、この検出方法を用いて通信回線で（例えば、監視センターなどへ）報知するようにすることもできる。   In addition, this detection method can be used for notification via a communication line (for example, to a monitoring center or the like).

さらに、実施形態及び実施例では、単相三線式の誘導型積算電力計について述べたが、これに限定されるものではなく、図９のような液晶式のものや三相方式のものについても同様に適用できる。   Further, in the embodiments and examples, the single-phase three-wire type inductive integrating wattmeter has been described. However, the present invention is not limited to this, and the liquid crystal type and the three-phase type as shown in FIG. The same applies.

この発明は、クランプ金具が外れた際の電位差を検出して報知する。そのため、検定試験後にクランプ金具を戻し忘れたこともチェックできるので、ヒューマンエラーの防止にも利用できる。   The present invention detects and notifies the potential difference when the clamp fitting is removed. Therefore, it is possible to check that the clamp fitting has been forgotten to be returned after the verification test, which can be used to prevent human error.

実施形態の正面図Front view of the embodiment 実施形態の報知手段の作用説明図Action explanatory drawing of the alerting | reporting means of embodiment 実施例１を示す回路ブロック図Circuit block diagram showing the first embodiment 実施例１の他の態様を示す回路ブロック図Circuit block diagram showing another mode of the first embodiment 実施例２の斜視図The perspective view of Example 2 実施例２の作用説明図Action explanatory drawing of Example 2 実施例２の他の態様を示す斜視図The perspective view which shows the other aspect of Example 2. FIG. 実施例２の他の態様を示す斜視図The perspective view which shows the other aspect of Example 2. FIG. 本願発明を適用した液晶式積算電力計を示す正面図Front view showing a liquid crystal integrated wattmeter to which the present invention is applied 従来例の作用説明図Action explanatory diagram of conventional example

符号の説明Explanation of symbols

２ 電圧線輪
３ 電流線輪
４ 端子ボックス
７ａ 補助端子
７ｃ 補助端子
８ クランプ金具
１０ 報知装置
１１ａ 接続端子
１１ｃ 接続端子
１２ａ ネオン管
１２ｃ ネオン管
２１ ＬＥＤ
２１’ ＬＥＤ
２２ 電流制限抵抗
２２’ 電流制限抵抗
２３ 逆流防止用ダイオード
２３’逆流防止用ダイオード 2 Voltage line ring 3 Current line ring 4 Terminal box 7a Auxiliary terminal 7c Auxiliary terminal 8 Clamp fitting 10 Notification device 11a Connection terminal 11c Connection terminal 12a Neon tube 12c Neon tube 21 LED
21 'LED
22 Current limiting resistor 22 'Current limiting resistor 23 Backflow prevention diode 23' Backflow prevention diode

Claims (2)

電源側のクランプ金具で短絡される積算電力計の電流線輪と電圧線輪端子間の電位差を検出し、その検出した電位差に基づいて盗電を検出する盗電検出方法。   A theft detection method that detects a potential difference between a current line ring and a voltage line ring terminal of an integrating wattmeter that is short-circuited by a clamp on the power supply side, and detects theft based on the detected potential difference. 電源側のクランプ金具で短絡される電流線輪と電圧線輪端子間の電位差に基づいて報知を行う報知手段を備えた積算電力計。   An integrating wattmeter comprising a notification means for performing notification based on a potential difference between a current line ring and a voltage line ring terminal that are short-circuited by a clamp fitting on the power supply side.
JP2005143940A 2004-06-08 2005-05-17 Theft detection method and integrated wattmeter Expired - Fee Related JP4429206B2 (en)

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CN103364649A (en) * 2012-04-06 2013-10-23 国家电网公司 Detector, detection method for communication starting, and detection method for electricity stealing prevention
CN103713233A (en) * 2013-12-18 2014-04-09 国家电网公司 Low-voltage distribution subcircuit identifying device
CN109783541A (en) * 2019-01-11 2019-05-21 国家电网有限公司 A method of investigation applies resident's conjunction table electricity price industry and commerce power consumer
WO2019182172A1 (en) * 2018-03-21 2019-09-26 누리플렉스 홀딩스 아이엔씨 Automatic meter reading system, meter reading terminal, and electricity theft detection method using same
CN111999677A (en) * 2020-10-28 2020-11-27 江苏智臻能源科技有限公司 Indoor and outdoor short circuit identification method based on meter box monitoring terminal and intelligent electric meter
CN114113777A (en) * 2021-11-15 2022-03-01 安特仪表集团有限公司 Ammeter capable of improving safety factor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103364649A (en) * 2012-04-06 2013-10-23 国家电网公司 Detector, detection method for communication starting, and detection method for electricity stealing prevention
CN103713233A (en) * 2013-12-18 2014-04-09 国家电网公司 Low-voltage distribution subcircuit identifying device
WO2019182172A1 (en) * 2018-03-21 2019-09-26 누리플렉스 홀딩스 아이엔씨 Automatic meter reading system, meter reading terminal, and electricity theft detection method using same
CN109783541A (en) * 2019-01-11 2019-05-21 国家电网有限公司 A method of investigation applies resident's conjunction table electricity price industry and commerce power consumer
CN109783541B (en) * 2019-01-11 2020-10-16 国家电网有限公司 Method for troubleshooting and applying resident meter-matching electricity price industrial and commercial power users
CN111999677A (en) * 2020-10-28 2020-11-27 江苏智臻能源科技有限公司 Indoor and outdoor short circuit identification method based on meter box monitoring terminal and intelligent electric meter
CN114113777A (en) * 2021-11-15 2022-03-01 安特仪表集团有限公司 Ammeter capable of improving safety factor
CN114113777B (en) * 2021-11-15 2022-08-16 安特仪表集团有限公司 Ammeter capable of improving safety factor

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