JP4663377B2 - Electronic energy meter - Google Patents
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- JP4663377B2 JP4663377B2 JP2005105183A JP2005105183A JP4663377B2 JP 4663377 B2 JP4663377 B2 JP 4663377B2 JP 2005105183 A JP2005105183 A JP 2005105183A JP 2005105183 A JP2005105183 A JP 2005105183A JP 4663377 B2 JP4663377 B2 JP 4663377B2
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- 238000001514 detection method Methods 0.000 claims description 53
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Description
本発明は被測定系の使用電力量を測定する電子式電力量計に関する。 The present invention relates to an electronic watt-hour meter that measures the power consumption of a system under measurement.
従来より、一般家庭や工場、事業所の使用電力量等、電力データを測定する電子式電力量計が普及してきている。当該電子式電力量計は、被測定系の電力を測定・演算する電力演算部と、電力演算部で演算した当該演算結果を使用電力量や最大使用電力等の電力データに編集する制御部と、制御部にて編集された電力データを表示する表示部とを具備している。 2. Description of the Related Art Conventionally, electronic watt-hour meters that measure power data such as the amount of power used by ordinary households, factories, and offices have become widespread. The electronic watt-hour meter includes a power calculation unit that measures and calculates the power of the system under measurement, and a control unit that edits the calculation result calculated by the power calculation unit into power data such as power consumption and maximum power consumption. And a display unit for displaying the power data edited by the control unit.
また、計量データを記憶する方法としては計量器外部にＲＦタグを具備し当該ＲＦタグに計量データ等必要なデータをハンディターミナル等を介し人手により入力する検針システム（例えば特許文献１）や、計量器の内部または外部にＲＦタグを設けておき計量データ等必要なデータを記憶しておく計量器ならびに計量システムがある（例えば特許文献２）。 In addition, as a method of storing measurement data, a meter reading system (for example, Patent Document 1) in which an RF tag is provided outside the measuring instrument and necessary data such as measurement data is manually input to the RF tag via a handy terminal or the like. There is a measuring instrument and a measuring system in which an RF tag is provided inside or outside the instrument and necessary data such as measuring data is stored (for example, Patent Document 2).
また、電圧側入力を断線する不正使用を防止する電力量計としては端子ブロックに取り外し困難な電圧短絡辺を設けたことを特徴とした電力量計が存在する（例えば特許文献３）。
しかしながら、従来の電子式電力量計では需要者により不正使用された場合検出する方法がなかった。電子式電力量計は電圧と電流を検出し電力量を算出するものであるところ、電圧を供給しなければ電子式電力量計側から見た電力演算結果をゼロまたは軽減することが可能である。需要家自身の電力供給は妨げられることなく、電子式電力量計の計量を停止もしくは軽減することができるので、近年、電子式電力量計の電圧検出部への電圧印加を遮断する不正が多発するに至っている。従って、電力量計は電力使用者の電力料金の取引きに用いられるものであるところ不正防止または不正を検出する必要があった。 However, the conventional electronic watt-hour meter has no method for detecting when it is illegally used by a consumer. The electronic watt-hour meter detects voltage and current and calculates the amount of power. If no voltage is supplied, the power calculation result viewed from the electronic watt-hour meter can be reduced to zero or reduced. . Since the customer's own power supply is not hindered, the metering of the electronic watt-hour meter can be stopped or reduced, and in recent years, fraud that interrupts the voltage application to the voltage detector of the electronic watt-hour meter has frequently occurred. Has led to. Therefore, the watt-hour meter is used for a power charge transaction of a power user, and it is necessary to prevent fraud or detect fraud.
本発明は、上記のような電力不正使用を検出することができる電子式電力量計を提供することを目的とする。 An object of this invention is to provide the electronic watt-hour meter which can detect the above unauthorized use of electric power.
上記目的を達成するために、本発明による電子式電力量計は、被測定系の電圧を検出する電圧検出手段と、被測定系の電流を検出する電流検出手段と、前記電圧検出手段の検出信号と電流検出手段の検出信号を乗算して被測定系の消費電力を測定する電力演算手段と、前記電圧検出手段が電圧を検出しない時に前記電流検出手段が電流を検出した場合には異常であると判断する異常判別手段とを具備したことを特徴とする。 To achieve the above object, an electronic watt-hour meter according to the present invention comprises a voltage detection means for detecting a voltage of a system under measurement, a current detection means for detecting a current of the system under measurement, and a detection of the voltage detection means. A power calculation means for multiplying the signal and the detection signal of the current detection means to measure the power consumption of the system under measurement, and abnormal when the current detection means detects a current when the voltage detection means does not detect a voltage. An abnormality determining means for determining that there is present is provided.
本発明によれば、電子式電力量計にて不正使用を検出することができるので、不正な電力料金の取引きを防止することができる。 According to the present invention, since unauthorized use can be detected by an electronic watt-hour meter, it is possible to prevent unauthorized trading of power charges.
以下、本発明の実施例を説明する。 Examples of the present invention will be described below.
本発明による電子式電力量計の実施例１を図１を参照して説明する。図１は本発明による電子式電力量計の実施例１を示す内部構成図である。 A first embodiment of an electronic watt-hour meter according to the present invention will be described with reference to FIG. FIG. 1 is an internal configuration diagram showing Embodiment 1 of an electronic watt-hour meter according to the present invention.
図１において、１は端子ブロックで電子式電力量計本体と電力線とを接続するために設けられ、１Ｓ、２Ｓ、３Ｓ端子は電源側に、１Ｌ、２Ｌ、３Ｌ端子は負荷側に接続されている。なお、本実施例では単相３線式の電子式電力量計としている。２は電力演算部で使用電力を演算しており、１Ｓ−１Ｌ間の電流（１側電流）を検出する電流検出部２ａと、３Ｓ−３Ｌ間の電流(３側電流)を検出する電流検出部２ｂと、１Ｓ−２Ｓ間ならびに３Ｓ−２Ｓ間の電圧（それぞれ１側電圧、３側電圧）を検出する電圧検出部２ｃと、１側電流と１側電圧、３側電流と３側電圧を乗算する電力乗算部２ｄから構成されている。３は制御部でマイクロコンピュータ等により構成され、電力演算部２の演算結果を電力データとして編集し記憶、表示を制御する。なお、ここで電力データとは被測定系の使用電力量や最大使用電力等、需要家の使用電力に関するデータをいう。４は遮断器で不正使用時等に制御部３が異常と判断した場合に電流を遮断する。４ａは１Ｓ−１Ｌ（１側電流）を４ｂは３Ｓ−３Ｌ電流（３側電流）を遮断する。当該遮断動作は制御部３により制御される。５は表示器で液晶表示器等で構成されており、制御部３にて不正使用等異常判断された場合に異常情報を、また制御部３にて演算された電力データを表示する。６は通信部でカレントループ等のインタフェース回路にて構成され、外部の伝送制御装置を介し電話回線に接続されたり、ネットワークに接続されたりするものである。制御部３にて不正使用等異常判断されたときの異常情報や、演算された電力データを外部に伝送する。７は電波送信部で本実施例における電子式電力量計の外部に取り付けられた電波送受信式記憶装置８に対し制御部３にて不正使用等異常判断されたときの異常情報ならびに演算された電力データを無線電波にて伝送し、その伝送動作は制御部３に制御されている。８は電波送受信式記憶装置で所謂ＲＦタグ、ＩＣタグと呼ばれる電波により書き込み、呼び出しができる不揮発性半導体メモリで構成され、電波送信部７により送信された異常情報や電力データを記憶する。この電波送受信式記憶装置８は電子式電力量計本体である電力量計測部１０Ａの筐体表面等に貼られる。ここで電波送受信式記憶装置８は例えば図２に示すように構成される。すなわち２０１はアンテナであり電波の送受を行う。２０２は送受信部でアンテナ２０１を介し電波信号を送受信する。２０３は記憶部で強誘電メモリ（Ｆ−ＲＡＭ）等の不揮発性メモリにより構成されており送受信部２０２が受信した場合は前回データ取得日や需要家ＩＤ番号等のデータを記憶し、送信する場合は使用電力量や最大使用電力等の電力データ等、記憶しているデータを読み出す機能を有する。
In FIG. 1, 1 is a terminal block provided to connect the electronic watt-hour meter main body and the power line, 1S, 2S, 3S terminals are connected to the power source side, 1L, 2L, 3L terminals are connected to the load side. Yes. In this embodiment, a single-phase three-wire electronic watt-hour meter is used. Reference numeral 2 denotes a power calculation unit that calculates power consumption. A current detection unit 2a that detects a current (1 side current) between 1S and 1L and a current detection that detects a current (3 side current) between 3S and 3L. Voltage detector 2c for detecting the voltage between unit 2b and 1S-2S and 3S-2S (1 side voltage and 3 side voltage, respectively), 1 side current and 1 side voltage, 3 side current and 3 side voltage It comprises a power multiplier 2d for multiplication. A control unit 3 is configured by a microcomputer or the like, and edits and stores the calculation result of the power calculation unit 2 as power data and controls display. Here, the electric power data refers to data relating to the electric power used by the consumer, such as the electric power used by the system under measurement and the maximum electric power used. 4 is a circuit breaker, which cuts off the current when the control unit 3 determines that an abnormality has occurred during unauthorized use. 4a cuts off 1S-1L (1 side current) and 4b cuts off 3S-3L current (3 side current). The blocking operation is controlled by the control unit 3. Reference numeral 5 denotes a display, which includes a liquid crystal display or the like, and displays abnormality information when the controller 3 determines abnormality such as unauthorized use, and displays power data calculated by the controller 3. A communication unit 6 includes an interface circuit such as a current loop, and is connected to a telephone line or connected to a network via an external transmission control device. Abnormal information when abnormalities such as unauthorized use are determined by the control unit 3 and the calculated power data are transmitted to the outside. Reference numeral 7 denotes a radio wave transmission unit, which is abnormal information and an electric power calculated when the control unit 3 determines that the radio wave transmission / reception storage device 8 attached to the outside of the electronic watt-hour meter in this embodiment is illegally used. Data is transmitted by radio waves, and the transmission operation is controlled by the control unit 3. Reference numeral 8 denotes a radio wave transmission / reception storage device, which is constituted by a so-called RF tag or IC tag, which is a nonvolatile semiconductor memory that can be written and called by radio waves, and stores abnormal information and power data transmitted by the radio wave transmission unit 7. This radio wave transmission / reception storage device 8 is affixed to the surface of the casing of the electric energy measuring unit 10A, which is an electronic watt-hour meter body. Here, the radio wave transmission / reception type storage device 8 is configured as shown in FIG. 2, for example. That is, 201 is an antenna that transmits and receives radio waves. A transmission /
次に、本実施例の動作を説明する。演算部２は需要者が使用した電力を演算し制御部３にその演算結果を伝える。制御部３は使用電力量等の電力データに変換し当該データを記憶し、表示器５に表示を行う。 Next, the operation of this embodiment will be described. The calculation unit 2 calculates the power used by the consumer and transmits the calculation result to the control unit 3. The control unit 3 converts the data into power data such as the amount of power used, stores the data, and displays the data on the display 5.
ところで、使用者において電力量計の計量を停止または軽減させることができれば、電力料金を軽減させることができる。そこで、近年１Ｓ端子または３Ｓ端子から電圧検出部に接続されている信号線を１Ｓ側または３Ｓ側、もしくは１Ｓ、３Ｓ両側切断する方法による不正が多く発生している。このとき１Ｓ−１Ｌ間、３Ｓ−３Ｌ間の電流線は接続されたままなので負荷側には電力を通電させることができるが電力量計の計量は停止または軽減してしまう。例えば１Ｓ側のみまたは３Ｓ側のみ電圧を切断した場合、計量は約２分の１となり、１Ｓ、３Ｓ両側切断した場合、計量は停止する。 By the way, if the user can stop or reduce the metering of the watt hour meter, the power charge can be reduced. Thus, in recent years, many frauds have occurred due to the method of cutting the signal line connected to the voltage detection unit from the 1S terminal or 3S terminal to the 1S side or 3S side, or both sides of 1S and 3S. At this time, since the current line between 1S-1L and 3S-3L remains connected, power can be supplied to the load side, but metering of the watt-hour meter is stopped or reduced. For example, when the voltage is cut only on the 1S side or only on the 3S side, the weighing is about a half, and when the both sides are cut off on the 1S and 3S sides, the weighing is stopped.
しかし、本実施例における電子式電力量計ではこのような不正時にも次のように不正を検出する。すなわち、電流検出部２ａ、２ｂは負荷が使用されることで１側、３側電流をそれぞれ検出するが、電圧検出部２ｃが１Ｓ端子側、３Ｓ端子側の電圧がそれぞれゼロであると検出した場合、不正使用されていることになる。そこで、制御部３では１Ｓ側電圧実質ゼロ時に電流検出部２ａが、３Ｓ側電圧実質ゼロ時に電流検出部２ｂがそれぞれ電流を検出した場合には不正と判断する。 However, the electronic watt-hour meter in the present embodiment detects fraud even in the case of such fraud. That is, the current detectors 2a and 2b detect the 1-side and 3-side currents respectively by using the load, but the voltage detector 2c detects that the voltages on the 1S terminal side and the 3S terminal side are zero respectively. If it is, it will be used illegally. Therefore, in the control unit 3, the current detection unit 2a determines that the current is abnormal when the 1S side voltage is substantially zero and the current detection unit 2b detects the current when the 3S side voltage is substantially zero.
不正があったと判断した制御部３は、不正があった旨の異常情報を電波送信部７を介し電波送受信式記憶装置８に記憶させる。また、電子式電力量計の計量データも併せて電波送信部７を介し電波送受信式記憶装置８に記憶させておく。 The control unit 3 that has determined that there is a fraud causes the radio wave transmission / reception storage device 8 to store abnormality information indicating that there has been a fraud through the radio wave transmission unit 7. The weighing data of the electronic watt-hour meter is also stored in the radio wave transmission / reception storage device 8 via the radio wave transmission unit 7.
このようにすれば、例えば１ヶ月に１度検針員等により計量値が収集される際、電波送受信式記憶装置８としてのＲＦタグを剥がして持ち帰り、営業所等で計量値を読み出すとともに不正の有無を調査すれば、不正料金の取引きを未然に防止することができる。なお、ＲＦタグを剥がす時、同時にデータ未記入のＲＦタグを貼り付けておけばさらに次回検針までの計量値ならびに異常情報を取得することができる。 In this way, for example, when a measurement value is collected once a month by a meter reader or the like, the RF tag as the radio wave transmission / reception type storage device 8 is peeled off and taken home, and the measurement value is read at the sales office or the like. By investigating the presence or absence, it is possible to prevent unauthorized charges from being traded. When the RF tag is peeled off, if the RF tag with no data is attached at the same time, the measurement value and the abnormality information until the next meter reading can be acquired.
また、不正があったと判断した制御部３は不正があった旨の異常情報を表示器５に表示しておく。 In addition, the control unit 3 that has determined that there has been a fraud displays abnormal information indicating that there has been a fraud on the display 5.
不正があったと判断した制御部３は不正があった旨の異常情報を通信部６を介し例えば電話回線や電子メール等により営業所等に設置されているセンタ装置に伝送することも可能である。 The control unit 3 that has been determined to be fraudulent can also transmit abnormality information to the effect of fraud to the center device installed in the sales office or the like via the communication unit 6, for example, by telephone line or e-mail. .
さらに、不正があったと判断した制御部３は遮断器４ａ、遮断器４ｂに対し遮断指令を出し、遮断器４ａ、遮断器４ｂは電流線を遮断して負荷への給電を停止させ、不正防止を図ることもできる。 Further, the control unit 3 that has determined that there is a fraud issues a break command to the breaker 4a and the breaker 4b, and the breaker 4a and the breaker 4b cut off the current line to stop power supply to the load, thereby preventing fraud. Can also be planned.
以上のように、本発明を用いれば、不正使用があった場合、異常を検出し異常情報としてその旨記憶、伝送または表示し、さらに負荷への給電を停止することができる電子式電力量計を提供することができる、 As described above, according to the present invention, in the case of unauthorized use, an electronic watt-hour meter that can detect an abnormality, store, transmit or display the abnormality as abnormality information, and can stop power supply to the load. Can provide,
本発明による電子式電力量計の実施例２を図３を参照して説明する。図３は本発明による電子式電力量計の実施例２を示す内部構成図である。 A second embodiment of an electronic watt-hour meter according to the present invention will be described with reference to FIG. FIG. 3 is an internal block diagram showing Embodiment 2 of the electronic watt-hour meter according to the present invention.
図３において、実施例１と相違する点は、実施例１では電波送信部７を介し、外部に取り付けられた電波送受信式記憶装置８に異常情報ならびに電力データを記憶させたのに対し、電子式電力量計内部に記憶装置９を設け、記憶装置９にこれらのデータを記憶させておく点である。記憶装置９は無線電波による伝送機能を有しておりその構成は図４に示す。記憶装置９は所謂ＲＦタグ、ＩＣタグと呼ばれる電波により書き込み、呼び出しができる不揮発性半導体メモリにより構成されており、記憶ならびに読み出しは電気的に接続された制御部３により制御されるとともに外部からの電波によりデータの読み出しをすることも可能である。 In FIG. 3, the difference from the first embodiment is that in the first embodiment, abnormal information and power data are stored in the radio wave transmission / reception storage device 8 attached to the outside via the radio wave transmission unit 7. The storage device 9 is provided inside the electric energy meter, and these data are stored in the storage device 9. The storage device 9 has a transmission function using radio waves, and its configuration is shown in FIG. The storage device 9 is constituted by a so-called RF tag or IC tag, which is a non-volatile semiconductor memory that can be written and called by radio waves. Storage and reading are controlled by an electrically connected control unit 3 and from the outside. It is also possible to read data by radio waves.
次に、記憶装置９について図４を参照して説明する。４０１はアンテナで、外部装置、例えば電波発生機能を有するハンディターミナルからの電波信号を送受信する機能を持つ。４０２は送受信部で、アンテナ４０１にて受信した電波発生機能を有するハンディターミナルから送信される前回データ取得日や需要家ＩＤ番号等のデータを記憶部４０３に記憶させ、記憶部４０３が記憶している使用電力量や最大使用電力等の電力データをアンテナ４０１から電波にて送信する。４０３は記憶部で不揮発性のメモリ、例えば強誘電メモリ（Ｆ−ＲＡＭ）等により構成され、アンテナ４０１、送受信部４０２を介して電波により設定される前回データ取得日や需要家ＩＤ番号等のデータ、ならびに制御回路４０４を介し電子式電力量計本体の制御部３により記憶させられる電力データ等のデータを記憶する。４０４は制御回路で、外部と電気的な伝送の制御を行うものであり、制御部３とバス等により電気的に接続されてデータの書き込み、読み出しを行う。
Next, the storage device 9 will be described with reference to FIG. An
不正があったと判断した制御部３は記憶装置９に異常情報ならびに電力情報を記憶させる。電波送受信機能を持つハンディターミナル等で記憶装置９に記憶されている異常情報ならびに電力情報を呼び出すことにより不正の有無を調査すれば、不正料金の取引きを未然に防止することができる。 The control unit 3 that has determined that there is fraud causes the storage device 9 to store abnormality information and power information. If the presence / absence of fraud is investigated by calling up abnormal information and power information stored in the storage device 9 with a handy terminal or the like having a radio wave transmission / reception function, it is possible to prevent unauthorized charges from being traded.
一方、通常電波による送受信を行う場合、電波の送受信には多大な電力を必要とする。しかし、電圧線を切断する不正使用がなされた場合、電子式電力量計は外部からの電源で動作することは期待できず、内部のバックアップバッテリ等を電力供給源として動作することになる。通常の電波送受信回路を用いた場合前述のとおり、消費電力が大きいため、容量の大きなバックアップバッテリ等を必要とする。しかし、本発明において電波送受信式記憶装置８は外部からの電波を電源として動作しバックアップバッテリ等の電力を必要としないので、電子式電力量計の電源を小型にすることができる。 On the other hand, when performing transmission / reception using normal radio waves, a large amount of power is required for transmission / reception of radio waves. However, if unauthorized use is made to disconnect the voltage line, the electronic watt-hour meter cannot be expected to operate with an external power source, and operates with an internal backup battery or the like as a power supply source. When a normal radio wave transmission / reception circuit is used, as described above, since power consumption is large, a backup battery having a large capacity is required. However, in the present invention, the radio wave transmission / reception storage device 8 operates using external radio waves as a power source and does not require power from a backup battery or the like, so the power source of the electronic watt-hour meter can be reduced in size.
以上のように、本発明を用いれば、不正使用があった場合、異常を検出し異常情報としてその旨記憶、伝送または表示し、さらに負荷への給電を停止することができる小型な電源の電子式電力量計を提供することができる、 As described above, according to the present invention, in the case of unauthorized use, an electronic device of a small power source that can detect an abnormality and store, transmit or display the abnormality as abnormality information, and can stop power supply to the load. Can provide an electric energy meter,
１ 端子ブロック
２ 電力演算部
２ａ 電流検出部
２ｂ 電流検出部
２ｃ 電圧検出部
２ｄ 電力乗算部
３ 制御部
４ａ 遮断器
４ｂ 遮断器
５ 表示器
６ 通信部
７ 電波送信部
８ 電波送受信式記憶装置
９ 記憶装置
１０Ａ 電力量計測部
１０Ｂ 電力量計測部
２０１ アンテナ
２０２ 送受信部
２０３ 記憶部
４０１ アンテナ
４０２ 送受信部
４０３ 記憶部
４０４ 制御回路
DESCRIPTION OF SYMBOLS 1 Terminal block 2 Power calculation part 2a Current detection part 2b Current detection part 2c Voltage detection part 2d Power multiplication part 3 Control part 4a Breaker 4b Breaker 5 Display 6 Communication part 7 Radio wave transmission part 8 Radio wave transmission / reception storage device 9 Memory Device 10A Electric energy measurement unit 10B Electric
Claims (6)
被測定系の電流を検出する電流検出手段と、
前記電圧検出手段の検出信号と電流検出手段の検出信号を乗算して被測定系の消費電力を測定する電力演算手段と、
前記電圧検出手段が電圧を検出しない時に前記電流検出手段が電流を検出した場合には異常であると判断する異常判別手段と
を具備したことを特徴とする電子式電力量計。 Voltage detection means for detecting the voltage of the system under measurement;
Current detection means for detecting the current of the system under measurement;
Power calculating means for measuring the power consumption of the system under measurement by multiplying the detection signal of the voltage detection means and the detection signal of the current detection means;
An electronic watt-hour meter comprising: an abnormality determination unit that determines that an abnormality occurs when the current detection unit detects a current when the voltage detection unit does not detect a voltage.
被測定系の電流を検出する電流検出手段と、
前記電圧検出手段の検出信号と電流検出手段の検出信号を乗算して被測定系の消費電力を測定する電力演算手段と、
前記電圧検出手段が電圧を検出しない時に前記電流検出手段が電流を検出した場合には異常であると判断する異常判別手段と、
前記異常判別手段が異常と判断した異常情報を電波にて送信する電波送信部と、
を有する電力量計測部と、
前記電力量計測部の外部に設けられ、前記電波送信部からの電波信号により前記異常情報を記憶する記憶装置と、
を具備したことを特徴とする電子式電力量計。
Voltage detection means for detecting the voltage of the system under measurement;
Current detection means for detecting the current of the system under measurement;
Power calculating means for measuring the power consumption of the system under measurement by multiplying the detection signal of the voltage detection means and the detection signal of the current detection means;
An abnormality determining means for determining that the current detecting means detects an abnormality when the voltage detecting means does not detect a voltage;
A radio wave transmission unit that transmits abnormal information determined by the abnormality determination unit as abnormal, by radio waves;
An electric energy measuring unit having
Provided outside of the power measurement unit, a storage device for storing pre Kikoto normal information by radio signal from the radio transmission section,
An electronic watt-hour meter comprising:
被測定系の電流を検出する電流検出手段と、
前記電圧検出手段の検出信号と電流検出手段の検出信号を乗算して被測定系の消費電力を測定する電力演算手段と、
前記電圧検出手段が電圧を検出しない時に前記電流検出手段が電流を検出した場合には異常であると判断する異常判別手段と、
前記異常判別手段が異常と判断した異常情報を記憶し外部装置からの電波信号により前記異常情報を読み出すことが可能な記憶手段と
を具備したことを特徴とする電子式電力量計。 Voltage detection means for detecting the voltage of the system under measurement;
Current detection means for detecting the current of the system under measurement;
Power calculating means for measuring the power consumption of the system under measurement by multiplying the detection signal of the voltage detection means and the detection signal of the current detection means;
An abnormality determining means for determining that the current detecting means detects an abnormality when the voltage detecting means does not detect a voltage;
An electronic watt-hour meter comprising storage means for storing abnormality information determined by the abnormality determination means as abnormal and capable of reading the abnormality information by a radio signal from an external device.
被測定系の電流を検出する電流検出手段と、
前記電圧検出手段の検出信号と電流検出手段の検出信号を乗算して被測定系の消費電力を測定する電力演算手段と、
前記電圧検出手段が電圧を検出しない時に前記電流検出手段が電流を検出した場合には異常であると判断する異常判別手段と
前記異常判別手段が異常であると判断した場合に異常である旨表示する表示手段と
を具備することを特徴とする電子式電力量計。 Voltage detection means for detecting the voltage of the system under measurement;
Current detection means for detecting the current of the system under measurement;
Power calculating means for measuring the power consumption of the system under measurement by multiplying the detection signal of the voltage detection means and the detection signal of the current detection means;
When the voltage detection means does not detect a voltage, an abnormality determination means for determining that the current detection means detects an abnormality when the current detection means detects a current and an abnormality display when the abnormality determination means determines that the abnormality is abnormal And an electronic watt hour meter.
被測定系の電流を検出する電流検出手段と、
前記電圧検出手段の検出信号と電流検出手段の検出信号を乗算して被測定系の消費電力を測定する電力演算手段と、
前記電圧検出手段が電圧を検出しない時に前記電流検出手段が電流を検出した場合には異常であると判断する異常判別手段と
前記異常判別手段が異常であると判断した場合に通報する通信手段と
を具備することを特徴とする電子式電力量計。 Voltage detection means for detecting the voltage of the system under measurement;
Current detection means for detecting the current of the system under measurement;
Power calculating means for measuring the power consumption of the system under measurement by multiplying the detection signal of the voltage detection means and the detection signal of the current detection means;
An abnormality determination means for determining that an abnormality is detected when the current detection means detects a current when the voltage detection means does not detect a voltage; and a communication means for notifying when the abnormality determination means is determined to be abnormal An electronic watt-hour meter comprising:
前記端子ブロックの電源側端子と負荷側端子との間に接続され、前記異常判別手段が異常と判断したときに遮断動作を行う遮断手段と
を具備したことを特徴とする請求項１乃至５のいずれか１項記載の電子式電力量計。 A terminal block having a power supply side terminal and a load side terminal;
6. The apparatus according to claim 1, further comprising: a blocking unit that is connected between a power supply side terminal and a load side terminal of the terminal block and that performs a blocking operation when the abnormality determination unit determines that an abnormality has occurred. The electronic watt-hour meter of any one of Claims.
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| JP2005105183A JP4663377B2 (en) | 2005-03-31 | 2005-03-31 | Electronic energy meter |
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| CN101216510B (en) * | 2008-01-02 | 2012-05-09 | 武汉国测恒通智能仪器有限公司 | High voltage electric energy direct metered system and method |
| US8892375B2 (en) | 2008-05-09 | 2014-11-18 | Accenture Global Services Limited | Power grid outage and fault condition management |
| TWI392875B (en) * | 2009-05-22 | 2013-04-11 | Top Victory Invest Ltd | Electric device with power consumption measurement |
| CN101930026B (en) * | 2009-06-22 | 2012-10-17 | 冠捷投资有限公司 | Electronic device with power loss detection function |
| CN101726660B (en) * | 2009-12-25 | 2011-09-21 | 华北电力大学 | Identification method of transformer internal faults based on leakage magnetic field model |
| JP5488072B2 (en) * | 2010-03-12 | 2014-05-14 | オムロン株式会社 | Power measurement system, voltage measurement device, current measurement device, and power measurement method |
| CN101819230A (en) * | 2010-05-14 | 2010-09-01 | 中兴通讯股份有限公司 | Method and device for monitoring power consumption of single board |
| KR101251794B1 (en) * | 2011-09-30 | 2013-04-08 | 삼성전기주식회사 | Power measuring system |
| WO2014207795A1 (en) * | 2013-06-24 | 2014-12-31 | 三菱電機株式会社 | Three-phase four-wire power meter |
| JP2015117994A (en) * | 2013-12-18 | 2015-06-25 | 大崎電気工業株式会社 | Watthour meter |
| US9753063B2 (en) * | 2014-12-29 | 2017-09-05 | Landis+Gyr Inc. | Load side voltage sensing for utility meter |
| CN105988064B (en) * | 2015-11-25 | 2019-02-15 | 国网辽宁省电力有限公司锦州供电公司 | Can fault point menu and its to position of failure point positioning method |
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