JP3528843B2 - Electricity meter - Google Patents
Electricity meterInfo
- Publication number
- JP3528843B2 JP3528843B2 JP2002293851A JP2002293851A JP3528843B2 JP 3528843 B2 JP3528843 B2 JP 3528843B2 JP 2002293851 A JP2002293851 A JP 2002293851A JP 2002293851 A JP2002293851 A JP 2002293851A JP 3528843 B2 JP3528843 B2 JP 3528843B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- current transformer
- current
- cable
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、三相または単相３
線交流電路に設置される電力量計量装置に関するもので
ある。
【０００２】
【従来の技術】図５は、従来の電流計と電力量計と変流
器を用いて電流と電力量を計測、計量する構成図であ
る。以下、その構成について、図を参照しながら説明す
る。
【０００３】三相または単相３線交流電路１の電流や電
力量を計測、計量する場合、２相に独立した個別の変流
器２４，２５を設置するとともに、配線３４は変流器か
らの出力を電力量計５の電流入力端子５１に配線３４に
て接続し、また電力量計５には各相電圧が電圧入力端子
５２に入力するように配線３５にてスイッチ３６を介し
て接続されていた。
【０００４】
【発明が解決しようとする課題】近年は省エネルギー化
が叫ばれ、作業効率の向上、省資源化に結び付く取組み
が必要である。
【０００５】変流器の設置に関しては、その設置相及び
Ｋ側／Ｌ側を正しくあわせて設置することが重要であ
り、変流器２４，２５と電力量計５との配線に関して
は、変流器２４，２５の２次出力の極性ｋ，ｌを電力量
計５の入力端子記号に合わせて正しく配線することが重
要である。しかし実際に現場で変流器２４，２５や電力
量計５の設置及び配線工事を実施する場合、従来は、変
流器２４，２５と電力量計５とは個別に配線されてお
り、作業に多大の時間を要し、また配線時に変流器２
４，２５と交流電路１の相、ならびに変流器２４，２５
と電力量計５との極性について誤結線が多発しており、
また、熟練者不足から経験の浅い作業者が配線を行なう
ため、接続ミスによる事故も数多く発生していた。
【０００６】本発明は上記課題を解決するもので、誤結
線による資源や時間の浪費を防ぎ、作業性やメンテナン
ス性に優れた電力量計量装置を提供することを目的とし
ている。
【０００７】
【課題を解決するための手段】本発明は上記目的を達成
するために、三相または単相３線の交流電路からの電流
入力部と電圧入力部を設けた電力量計部と、前記三相ま
たは単相３線の交流電路の二つの相に取り付ける変流器
と、前記変流器と前記電流入力部を接続し、前記変流器
側と前記電流入力部側の両方に脱着可能なコネクタを有
するケーブルとを有し、二つの相に取り付ける前記変流
器を前記ケーブルと接続するための接続部は、一体化し
た１つのコネクタによるものであり、前記ケーブルの前
記変流器側コネクタを前記変流器の接続部に接続する電
力量計量装置を提供するものである。
【０００８】
【発明の実施の形態】上記した構成により、本発明の電
力量計量装置は、変流器とケーブルや電流入力部とケー
ブルとの接続が容易に正しく接続できる。
【０００９】以下、本実施の形態について、図１〜４を
参照しながら説明する。
【００１０】（実施の形態）図１のように三相交流電路
である被計測電路１のＲ相とＴ相に、電流計測用変流器
部２を配置し前記変流器部２と電力量計部４の電流入力
部４１間を専用電流配線ケーブル３とで構成し、そして
変流器部２は、Ｒ相用変流器２１と、Ｔ相用変流器２２
と同それぞれの変流器の２次出力をその出力特性ｋ，ｌ
を脱着容易な１つのコネクタ２３に結線するとともに、
さらにそれぞれの変流器の２次出力間には、ダイオード
を２１１，２２１のように互いに逆向きに設けてある。
次に、図２に示すように、それぞれの変流器２１，２２
の表面にはＲ相用変流器についてはＲ相表現が明確とな
る赤色の相色識別２１３並びにＫ側には電源側判別が容
易となる電源別極性識別２１２を、またＴ相用変流器に
ついては、Ｔ相表現が明確となる青色の相色識別２２３
並びにＫ側には電源側判別が容易となる電源側極性識別
２２２を施す。
【００１１】次に電力量計部４は、電流入力部４１をコ
ネクタとし一方電圧入力部４２についてはコネクタまた
はネジ止め端子にて構成されている。一方前記被計測電
路１と変流器部２と電力量計部４との配線は変流器部２
と電力量計部４の電流入力部４１間は専用の電流配線ケ
ーブル３にて接続され電力量計部４の電圧入力部につい
ては被計測電路１からの各相電圧をスイッチ３６を介し
て入力されるものである。ここで前記専用電流配線ケー
ブル３は、当然ながらその両端には変流器部２のコネク
タ２３と電力量計部４の電流入力部コネクタ４１に合致
するコネクタ３１及び３３が設けられている。
【００１２】以上の構成における変流器部２中のダイオ
ード２１１，２２１は変流器２１，２２の２次開放時保
護を目的として変流器側に設けられたもので、正常な状
態に接続されているときは変流器出力電圧はダイオード
特性の高抵抗領域で使用されるように設けられている。
【００１３】次に、以上の構成において変流器の被計測
電路への設置の際、変流器の極性を間違えた場合につい
て図３を用いて説明する。
【００１４】図は被計測電路のＴ相に設置する変流器の
電源側極性を誤って被計測電路の負荷側に設置した状態
を示す。
【００１５】このような場合、変流器部２の各変流器に
はダイオードにより２次開放時の保護が施されているの
で、被計測電路１を停電すること無く、専用電流配線ケ
ーブル３を変流器部２より取り外し、変流器２２の極性
ｋ，ｌが逆になったことに対応して専用電流配線ケーブ
ル３のコネクタ３１とケーブル３２の接続部において上
記極性を逆とした専用電流配線ケーブル７を用いて変流
器部２と電力量計部４を再接続することにより、容易に
配線替えを行うことができる。したがって、被計測電路
を停電すること無く容易に安全な作業を行うことができ
る。
【００１６】また、誤って変流器の被計測電路への設置
相を間違えた場合について図４とともに説明する。
【００１７】図は、Ｔ相に設置すべき変流器をＳ相に設
置した状態を示す。
【００１８】変流器部２から専用電流配線ケーブル３を
通じて電力量計部４に送られる電流の入力は、Ｔ相に設
置すべき変流器２２がＳ相に設置されたため、Ｔ相分と
してＳ相の電流情報が送られている。このため入力電流
と入力電圧の相がずれることにより電力量が正しく計測
できなくなるが、スイッチ３６を開とすれば、被計測電
路１を停電すること無く電力量計部３への電圧入力ケー
ブル３５のＴ相とＳ相の配線替を容易に行うことがで
き、正しく電力量を計測できる。
【００１９】
【発明の効果】以上の説明から明らかなように、本発明
の電力量計量装置は、変流器とケーブルや電流入力部と
ケーブルとの接続が容易に正しく接続でき、誤結線によ
る資源や時間の浪費を防ぎ、作業性やメンテナンス性に
優れた電力量計量装置を提供できる。Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a three-phase or single-phase
The present invention relates to a power metering device installed in a line AC circuit. 2. Description of the Related Art FIG. 5 is a configuration diagram for measuring and measuring current and electric energy using a conventional ammeter, watt hour meter and current transformer. Hereinafter, the configuration will be described with reference to the drawings. [0003] When measuring and measuring the current and electric energy of the three-phase or single-phase three-wire AC circuit 1, separate current transformers 24 and 25 for two phases are installed, and a wiring 34 is connected from the current transformer. Is connected to a current input terminal 51 of the watt-hour meter 5 via a wiring 34, and connected to the watt-hour meter 5 via a switch 36 via a wiring 35 so that each phase voltage is input to the voltage input terminal 52. It had been. [0004] In recent years, energy conservation has been called for, and efforts to improve work efficiency and conserve resources are required. [0005] When installing the current transformer, it is important that the installation phase and the K side / L side are properly aligned, and the wiring between the current transformers 24 and 25 and the watt hour meter 5 is changed. It is important to correctly wire the polarities k and l of the secondary outputs of the flowers 24 and 25 in accordance with the input terminal symbols of the watt hour meter 5. However, when actually installing and wiring the current transformers 24 and 25 and the watt hour meter 5 on site, conventionally, the current transformers 24 and 25 and the watt hour meter 5 are separately wired, Requires a lot of time, and the current transformer 2
4, 25 and the phase of AC circuit 1, and current transformers 24, 25
There are frequent misconnections about the polarity of the power meter 5 and
In addition, since inexperienced workers perform wiring due to lack of skilled workers, many accidents due to connection errors have occurred. An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a power metering device which prevents resources and time from being wasted due to erroneous connection and is excellent in workability and maintenance. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a watt hour meter section provided with a current input section and a voltage input section from a three-phase or single-phase three-wire AC circuit. A current transformer attached to two phases of the three-phase or single-phase three-wire AC circuit, connecting the current transformer and the current input unit ,
A cable having detachable connectors on both sides of the current input section, and a connection section for connecting the current transformer to be attached to two phases to the cable. der by one connector that is, before the cable
It is an object of the present invention to provide a power measuring device for connecting the current transformer side connector to a connection portion of the current transformer . [0008] With the above configuration, the electric energy meter of the present invention can easily and correctly connect the current transformer and the cable or the current input unit and the cable. The present embodiment will be described below with reference to FIGS. (Embodiment) As shown in FIG. 1, current measurement current transformers 2 are arranged on the R and T phases of a circuit under test 1 which is a three-phase AC circuit, and the current transformer 2 and power The current input section 41 of the meter section 4 is constituted by the dedicated current distribution cable 3, and the current transformer section 2 comprises an R-phase current transformer 21 and a T-phase current transformer 22.
The secondary output of each current transformer is output characteristics k, l
To one connector 23 that is easy to attach and detach,
Further, between the secondary outputs of the respective current transformers, diodes are provided in opposite directions, such as 211 and 221.
Next, as shown in FIG.
On the surface of the R phase current transformer, a red phase color identification 213 for clearly expressing the R phase expression, a K-side polarity identification 212 for each power supply for easy identification of the power supply side, and a T phase current transformer. For the detector, a blue phase color identification 223 for which the T phase expression is clear
In addition, a power-supply-side polarity identification 222 for facilitating power-supply-side discrimination is performed on the K side. The watt-hour meter section 4 has a current input section 41 as a connector and a voltage input section 42 as a connector or a screw terminal. On the other hand, the wiring between the measured electric circuit 1, the current transformer 2 and the watt-hour meter 4 is
The current input unit 41 of the watt-hour meter unit 4 is connected to the current input unit 41 by a dedicated current wiring cable 3. Is what is done. Here, the dedicated current distribution cable 3 is naturally provided with connectors 31 and 33 at both ends thereof that match the connector 23 of the current transformer section 2 and the current input section connector 41 of the watt hour meter section 4. The diodes 211 and 221 in the current transformer section 2 in the above configuration are provided on the current transformer side for the purpose of protecting the current transformers 21 and 22 at the time of secondary opening, and are connected in a normal state. In this case, the output voltage of the current transformer is provided so as to be used in a high resistance region having a diode characteristic. Next, a case where the polarity of the current transformer is incorrect when the current transformer is installed on the electric circuit to be measured in the above configuration will be described with reference to FIG. FIG. 1 shows a state in which the polarity of the current transformer installed in the T phase of the measured circuit is incorrectly installed on the load side of the measured circuit. In such a case, since each of the current transformers of the current transformer section 2 is protected by a diode when the secondary is opened, the dedicated current distribution cable 3 can be used without interruption of the power supply to the measured circuit 1. Is removed from the current transformer section 2 and the polarity is reversed at the connection between the connector 31 and the cable 32 of the dedicated current distribution cable 3 in response to the polarity k, l of the current transformer 22 being reversed. By reconnecting the current transformer unit 2 and the watt-hour meter unit 4 using the current distribution cable 7, the wiring can be easily changed. Therefore, a safe operation can be easily performed without a power failure of the electric circuit to be measured. A case where the current transformer is incorrectly installed on the electric circuit to be measured by mistake will be described with reference to FIG. FIG. 1 shows a state in which a current transformer to be installed in the T phase is installed in the S phase. The input of the current sent from the current transformer unit 2 to the wattmeter unit 4 through the dedicated current distribution cable 3 is input to the T phase because the current transformer 22 to be installed in the T phase is installed in the S phase. S-phase current information is sent. For this reason, the phase of the input current and the input voltage deviate from each other, so that the power amount cannot be measured correctly. Can easily perform wiring change between the T phase and the S phase, and can correctly measure the electric energy. As is apparent from the above description, the electric energy meter according to the present invention can easily and correctly connect the current transformer and the cable or the current input unit and the cable, and the connection can be made incorrectly. It is possible to provide a power metering device which prevents waste of resources and time and is excellent in workability and maintenance.
【図面の簡単な説明】
【図１】本発明の実施の形態における変流器と専用ケー
ブルと電力量計の構成図
【図２】同実施の形態における変流器単体部の正面図
【図３】同実施の形態における変流器の極性方向を間違
った説明図
【図４】同実施の形態における変流器の設置相を間違っ
た説明図
【図５】従来の電力量計の構成図
【符号の説明】
１ 被計測電路
２ 変流器部
２１ Ｒ相用変流器
２１１ ダイオード
２１２ Ｒ相用電源側の極性識別
２１３ Ｒ相用相色識別
２２ Ｔ相用変流器
２２１ ダイオード
２２２ Ｔ相用電源側の極性識別
２２３ Ｔ相用相色識別
２３ コネクタ
２４ Ｒ相用変流器
２５ Ｔ相用変流器
２６ 端子台
３ 専用電流配線ケーブル部
３１ コネクタ
３２ ケーブル
３３ コネクタ
３４ 電流入力配線
３５ 電圧入力配線
３６ スイッチ
４ 電力量計部
４１ 電流入力コネクタ
４２ 電圧入力コネクタ
５ 電力量計
５１ 電流入力端子
５２ 電圧入力端子
７ 専用配線ケーブルBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a current transformer, a dedicated cable, and a watt hour meter according to an embodiment of the present invention. FIG. 2 is a front view of a current transformer unit in the embodiment. FIG. 3 is an explanatory diagram showing an incorrect polarity direction of the current transformer in the embodiment. FIG. 4 is an explanatory diagram showing an incorrect installation phase of the current transformer in the embodiment. FIG. 5 is a configuration diagram of a conventional watt hour meter. [Description of Signs] 1 Electric circuit to be measured 2 Current transformer unit 21 R-phase current transformer 211 Diode 212 Polarity identification 213 for R-phase power supply side R-phase phase color identification 22 T-phase current transformer 221 Diode 222 T Polarity identification 223 for phase power supply side Phase color identification for T phase 23 Connector 24 Current transformer for R phase 25 Current transformer for T phase 26 Terminal block 3 Dedicated current wiring cable section 31 Connector 32 Cable 33 Connector 34 Current input wiring 35 Voltage input wiring 36 Switch 4 Electric energy Part 41 current input connector 42 voltage input connector 5 power meter 51 the current input terminal 52 voltage input terminal 7 grade wire cable
───────────────────────────────────────────────────── フロントページの続き (72)発明者 近藤 弘幸 大阪府門真市大字門真1006番地 松下電 器産業株式 会社内 (56)参考文献 特開 平10−26641（ＪＰ，Ａ) 実開 平７−34381（ＪＰ，Ｕ) 実開 平５−48253（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01R 11/00 - 11/66 G01R 21/00 - 22/00 130 G01R 15/18 H01R 13/64 - 13/642 H02J 1/00 309 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Kondo 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-10-26641 (JP, A) 34381 (JP, U) Japanese Utility Model Hei 5-48253 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G01R 11/00-11/66 G01R 21/00-22/00 130 G01R 15/18 H01R 13/64-13/642 H02J 1/00 309
Claims (1)
流入力部と電圧入力部を設けた電力量計部と、前記三相
または単相３線の交流電路の二つの相に取り付ける変流
器と、前記変流器と前記電流入力部を接続し、前記変流
器側と前記電流入力部側の両方に脱着可能なコネクタを
有するケーブルとを有し、二つの相に取り付ける前記変
流器を前記ケーブルと接続するための接続部は、一体化
した１つのコネクタによるものであり、前記ケーブルの
前記変流器側コネクタを前記変流器の接続部に接続する
電力量計量装置。(57) [Claim 1] A watt hour meter section provided with a current input section and a voltage input section from a three-phase or single-phase three-wire AC circuit, and the three-phase or single-phase three-wire a current transformer attached to the two phases of the AC circuit, the connecting the current input and the current transformer, the current transformer
Detachable connectors on both the device side and the current input side
And a chromatic cable, connecting portions for connecting said current transformer mounting into two phases and the cable state, and are due to a single connector that is integrated, the cable
An electric energy meter that connects the current transformer side connector to a connection portion of the current transformer .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002293851A JP3528843B2 (en) | 2002-10-07 | 2002-10-07 | Electricity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002293851A JP3528843B2 (en) | 2002-10-07 | 2002-10-07 | Electricity meter |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000352229A Division JP3402320B2 (en) | 2000-11-20 | 2000-11-20 | Electricity meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003177146A JP2003177146A (en) | 2003-06-27 |
| JP3528843B2 true JP3528843B2 (en) | 2004-05-24 |
Family
ID=19197216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002293851A Expired - Lifetime JP3528843B2 (en) | 2002-10-07 | 2002-10-07 | Electricity meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3528843B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854840A (en) * | 2012-11-28 | 2014-06-11 | 苏州工业园区新宏博通讯科技有限公司 | Quick junction device of current transformer |
| JP6187420B2 (en) * | 2014-09-11 | 2017-08-30 | 中国電力株式会社 | Current transformer |
-
2002
- 2002-10-07 JP JP2002293851A patent/JP3528843B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003177146A (en) | 2003-06-27 |
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