JPH04188085A - Discriminating system for ground of ac receptacle - Google Patents
Discriminating system for ground of ac receptacleInfo
- Publication number
- JPH04188085A JPH04188085A JP2316065A JP31606590A JPH04188085A JP H04188085 A JPH04188085 A JP H04188085A JP 2316065 A JP2316065 A JP 2316065A JP 31606590 A JP31606590 A JP 31606590A JP H04188085 A JPH04188085 A JP H04188085A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- distribution line
- line
- current signal
- signal
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
Description
この発明は、ＡＣ単相３線式およびＡＣ３相４線式の屋
内配線に於てグランド端子付きＡＣコンセントのグラン
ド線を判別するために使用するものである。The present invention is used to determine the ground wire of an AC outlet with a ground terminal in indoor wiring of AC single-phase three-wire system and AC three-phase four-wire system.
最近、ビルなどの屋内コンセントはＯＡ機器のためにグ
ランド端子付きのコンセントを使用するのが普通である
が、配電線のレイアウト変更などの工事によりアース側
配電線とグランド線とが入れ違って配線されてしまうこ
とがよくあり、グランド線が正しく接地されていなかっ
たりアース側配電線と接続されていなかった場合にはＯ
Ａ機器の障害の原因となっていた。しかし、このような
誤配線のチエツクは非常に困難で、しかも他の機器によ
り電源を使用中の活線状態に於ては良否の判定ができな
いという問題があった。Recently, it is common to use outlets with ground terminals for indoor office equipment such as buildings, but due to construction work such as changing the distribution line layout, the ground side distribution line and ground line are wired incorrectly. If the ground wire is not properly grounded or connected to the earth distribution line, the O
This caused equipment A to malfunction. However, it is very difficult to check for such incorrect wiring, and there is a problem in that it is impossible to determine whether the wiring is good or not in a live state where the power supply is being used by other equipment.
この発明の目的は、上記問題点を解決することであり、
電源を使用中の活線状態に於てアース側配電線とグラン
ド線とを簡単に判別することができるＡＣコンセントの
グランド判別方式を提供することである。
ｒｙｓ層を解決するための手段】
上記の目的を解決するため、この発明のＡＣコンセント
のグランド判別方式は、ＡＣコンセントの設置位置に於
てホット側配電線とアース側配電線またはグランド線と
の間に、商用電源から得た電流を商用電源周波数と異な
る周波数でオンオフした電流信号を入力し、受電設備、
配電盤、分電盤等に於てアース側配電線から前記電流信
号の有無を検出することにより前記ＡＣコンセントのグ
ランド線を判別するようにしている。
そしてさらに、アース側配電線を貫通させた電流トラン
スまたはアース側配電線に直列に設けた抵抗により前記
電流信号の有無を検出するようにしている。The purpose of this invention is to solve the above problems,
To provide a ground discrimination system for an AC outlet, which can easily discriminate between a ground side distribution line and a ground line in a live state when a power source is in use. [Means for Solving the RYS Layer] In order to solve the above object, the AC outlet ground determination method of the present invention distinguishes between the hot side distribution line and the earth side distribution line or ground line at the installation position of the AC outlet. In between, a current signal that turns on and off the current obtained from the commercial power supply at a frequency different from the commercial power supply frequency is input, and the power receiving equipment,
The ground wire of the AC outlet is determined by detecting the presence or absence of the current signal from the ground side power distribution line at a power distribution board, distribution board, or the like. Further, the presence or absence of the current signal is detected by a current transformer passing through the earth distribution line or by a resistor provided in series with the earth distribution line.
ＡＣコンセントの設置位置から３線のうちホット側配電
線とアース側配電線との間に電流信号を入力した場合に
は、分電盤等に於てアース側配電線からこの電流信号が
検出されＡＣコンセントの正しいアース側配電線を判別
することができ、これにより残りの１本がグランド線で
あると判別することができる。また、アース側配電線と
グランド線とが入れ違っていてＡＣコンセントの位置に
於てホット側配電線とグランド線との間に電流信号を入
力した場合には、分電盤等に於てアース側配電線から電
流信号が検出されないから誤配線であると判別すること
ができる。
［実施例］
配電用トランス１から単相３線式の電源線が引き出され
その中央線がアースされた後、ビルの配電盤２に導かれ
ている。配電盤２からは、アース側配電ＭＥ、一方のホ
ット側配電ｌａＨおよび別途アースされたグランド１ｉ
ｌＧがＩＭｉになって各分電盤３を経由してビル内に配
線され、その適宜個所にグランド端子付きのＡＣコンセ
ント４が設けられている。
配電盤３内に於てアース側配電線Ｅに周知のクランプ式
の電流トランスＣＴが取り付けられ、その出力が検出部
および送信部を備えた検出器５に入力されている。検出
器５の検出部は、電流トランスＣＴの出力の中に信号発
生器６から送られた電流信号があるか否かを検出し、そ
の判別信号を送信部からホット側配電線Ｈおよびアース
側配電線Ｅに入力し、周知の電力線搬送通信方式により
信号発生器６に送信するようになっている。
ＡＣコンセント４の位置に、発振部および受信部を備え
た信号発生器６が設けられ、２５Ｈｚでオンオフした電
流信号をホット側配電線Ｈとアース側配電綿Ｅまたはグ
ランド線Ｇ（判別前にはいずれか不明）との間に入力す
るとともに、検出器５から送られた判別信号を受信し音
声、可視表示等の適宜手段により表示するようになって
いる。
この電流信号は、配電線から得た電流を負荷抵抗に直列
に設けたＡＣサイリスタ（トライアック）、ＧＴＯ（ゲ
ートターンオフサイリスタ）等のスイッチング素子を２
５Ｈｚでオンオフすることによす作ったものであり、検
出器５に於ては２５Ｈｚで変調された電源電流の上側帯
波である７５Ｈｚの信号を検出し、判別信号を信号発生
器６に返送している。
次に、その作用について説明する。
ＡＣコンセント４の位置に於て信号発生器６から３線の
うちホット側配電線Ｈ（ホット側の検出は検電ドライバ
ー等により簡単にできる）とアース側配電ＭＥとの間に
電流信号を入力すると、分電盤２内に設けた電流トラン
スＣＴによりこの電流信号が検出されるから、検出器５
から判別信号が送出され信号発生器６がこの判別信号を
受信して表示し、正しいアース側配電線Ｅであることが
分る。そしてこれにより、電流信号を入力しなかった残
りの１本がグランドｇＧであることを判別することがで
きる。
また、ホット側配電ＭＨとグランド＄１１Ｇとの間に電
流信号を入力した場合には、この電流信号は電流トラン
スＣＴを通らないから検出されず、検出器５からは出力
信号が送出されないからグランド１１１ＪＩＧであるこ
とが判別できる。
信号発生器６から送出する信号として商用電源から得た
電流をオンオフした電流信号を使用した理由は、特別の
結合装置が不要で、かつ雑音が少なく使用中のＯＡ機器
に悪影響がないからである。
また、その周波数を２５Ｈｚに設定したのは、電源周波
数の２分の１（従って関西では３０Ｈｚ）で分局器を用
いて容易に得ることができ、しかもその検出は変調波の
上側帯波（７５Ｈ２）または下側帯波（２５Ｈｚ）を検
出することにより配電線には通常存在しない周波数であ
るから容易かつ確実に検出することができ誤動作のおそ
れがないからである。しかし、必ずしもこの周波数に限
られるものではなく、電源周波数と異なる値であり発生
する側帯波が雑音として通常存在しないものであれば例
えば商用電源周波数より大きい値でも実現可能である。
また、電流トランスを設ける位置は、分電盤内に限らず
、受電設備、配電盤等のＡＣコンセントより上流であっ
て正しいアース側配電線が確認できる位置であれば十分
である。さらに、判別信号を検出器から信号発生器に知
らせる手段としては、電力線搬送通信方式に限らず、例
えばインターコム、トランシーバ等周知のものを適宜使
用することができる。
なお、上記実施例に於ては、分電盤内に於てアース側配
電線から電流信号の有無を検出する手段として電流トラ
ンスを使用しているが、これに限られるものではなく、
例えば開閉器部分に於てアース側配電線に直列に抵抗を
接続しその端子電圧により検出するようにしてもよい。If a current signal is input between the hot side distribution line and the ground side distribution line of the three wires from the installation position of the AC outlet, this current signal will be detected from the ground side distribution line at the distribution board etc. It is possible to determine the correct earth side power distribution line of the AC outlet, and thereby it is possible to determine that the remaining one is the ground line. In addition, if the earth side distribution line and the ground line are inserted incorrectly and a current signal is input between the hot side distribution line and the ground line at the location of the AC outlet, the earth side distribution line at the distribution board etc. Since no current signal is detected from the distribution line, it can be determined that the wiring is incorrect. [Example] A single-phase three-wire power line is drawn out from a power distribution transformer 1, its center line is grounded, and then led to a power distribution board 2 in a building. From the switchboard 2, there is a ground side power distribution ME, one hot side power distribution laH, and a separately grounded ground 1i.
IG becomes IMi and is wired inside the building via each distribution board 3, and AC outlets 4 with ground terminals are provided at appropriate locations. A well-known clamp-type current transformer CT is attached to the ground-side power distribution line E in the distribution board 3, and its output is input to a detector 5 having a detection section and a transmission section. The detection section of the detector 5 detects whether or not there is a current signal sent from the signal generator 6 in the output of the current transformer CT, and transmits the determination signal from the transmission section to the hot side distribution line H and the ground side. The signal is input to the power distribution line E and transmitted to the signal generator 6 using a well-known power line carrier communication method. A signal generator 6 equipped with an oscillating part and a receiving part is installed at the position of the AC outlet 4, and transmits a current signal turned on and off at 25 Hz to the hot side distribution line H and the earth side distribution line E or ground line G (before discrimination At the same time, the discrimination signal sent from the detector 5 is received and displayed by appropriate means such as audio or visual display. This current signal is used to connect a switching element such as an AC thyristor (TRIAC) or GTO (gate turn-off thyristor), which is connected in series with a load resistor, to the current obtained from the distribution line.
The detector 5 detects a 75Hz signal, which is the upper sideband of the power supply current modulated at 25Hz, and sends a discrimination signal back to the signal generator 6. are doing. Next, its effect will be explained. At the position of the AC outlet 4, input a current signal from the signal generator 6 between the hot side power distribution line H (detection of the hot side can be easily done with a voltage detection screwdriver, etc.) and the ground side power distribution line ME among the three wires. Then, since this current signal is detected by the current transformer CT provided in the distribution board 2, the detector 5
A discrimination signal is sent out from the terminal, and the signal generator 6 receives and displays this discrimination signal, thereby confirming that the ground side distribution line E is correct. Accordingly, it can be determined that the remaining one to which no current signal is input is the ground gG. In addition, when a current signal is input between the hot side power distribution MH and the ground $11G, this current signal does not pass through the current transformer CT, so it is not detected, and no output signal is sent from the detector 5, so it is connected to the ground. It can be determined that it is 111JIG. The reason why a current signal obtained by turning on and off the current obtained from a commercial power supply is used as the signal sent from the signal generator 6 is that a special coupling device is not required, the noise is low, and there is no adverse effect on the OA equipment in use. . In addition, the frequency was set to 25Hz, which is half of the power supply frequency (therefore 30Hz in Kansai), which can be easily obtained using a splitter, and its detection is based on the upper sideband of the modulated wave (75H2). ) or lower sideband wave (25 Hz), which is a frequency that does not normally exist in power distribution lines, can be detected easily and reliably, and there is no risk of malfunction. However, the frequency is not necessarily limited to this frequency, and it is also possible to use a value higher than the commercial power frequency, for example, as long as the frequency is different from the power supply frequency and generated sideband waves do not normally exist as noise. Further, the location where the current transformer is provided is not limited to the inside of the distribution panel, but may be any location upstream from the AC outlet of the power receiving equipment, distribution panel, etc., and where the correct earth-side power distribution line can be confirmed. Further, the means for notifying the discrimination signal from the detector to the signal generator is not limited to the power line carrier communication method, and well-known means such as an intercom and a transceiver can be used as appropriate. In the above embodiment, a current transformer is used as a means for detecting the presence or absence of a current signal from the ground side distribution line in the distribution board, but the present invention is not limited to this.
For example, a resistor may be connected in series to the ground side power distribution line in the switch section, and the detection may be performed based on the terminal voltage of the resistor.
以上説明したとおり、この発明のＡＣコンセントのグラ
ンド判別方式は、雑音が少なく使用中のＯＡ機器に悪影
響がなく、電源を他の機器により使用中の活線状態に於
てアース側配電線とグランド線とを簡単に判別すること
ができ、電流信号を入力するための特別な結合回路が不
要であり、必要な測定器、回路等も少なく動作が確実で
誤動作のおそれがなく、しかも操作が簡単であるという
効果を奏するものである。As explained above, the method for determining the ground of an AC outlet according to the present invention has low noise, does not have a negative effect on the OA equipment in use, and can be used to connect the ground side distribution line and the ground in a live state when the power supply is being used by other equipment. wires can be easily distinguished, there is no need for a special coupling circuit to input the current signal, there are few required measuring instruments, circuits, etc., the operation is reliable, there is no risk of malfunction, and it is easy to operate. This has the effect of being
図は、この発明の実施例の概念図である。 The figure is a conceptual diagram of an embodiment of the invention.
Claims (3)
とアース側配電線またはグランド線との間に、商用電源
から得た電流を商用電源周波数と異なる周波数でオンオ
フした電流信号を入力し、受電設備、配電盤、分電盤等
に於てアース側配電線から前記電流信号の有無を検出す
ることにより前記ＡＣコンセントのグランド線を判別す
ることを特徴とするＡＣコンセントのグランド判別方式
。(1) Input a current signal that turns on and off the current obtained from the commercial power supply at a frequency different from the commercial power supply frequency between the hot side distribution line and the earth side distribution line or ground line at the installation position of the AC outlet, A method for determining the ground of an AC outlet, characterized in that the ground line of the AC outlet is determined by detecting the presence or absence of the current signal from a ground side distribution line in a power receiving equipment, a switchboard, a distribution board, etc.
前記電流信号の有無を検出することを特徴とする請求項
１記載のＡＣコンセントのグランド判別方式。(2) The method for determining the ground of an AC outlet according to claim 1, wherein the presence or absence of the current signal is detected by a current transformer that passes through a ground-side distribution line.
流信号の有無を検出することを特徴とする請求項１記載
のＡＣコンセントのグランド判別方式。(3) The method for determining the ground of an AC outlet according to claim 1, wherein the presence or absence of the current signal is detected by a resistor provided in series with the ground side power distribution line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2316065A JPH04188085A (en) | 1990-11-22 | 1990-11-22 | Discriminating system for ground of ac receptacle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2316065A JPH04188085A (en) | 1990-11-22 | 1990-11-22 | Discriminating system for ground of ac receptacle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04188085A true JPH04188085A (en) | 1992-07-06 |
Family
ID=18072874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2316065A Pending JPH04188085A (en) | 1990-11-22 | 1990-11-22 | Discriminating system for ground of ac receptacle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04188085A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08184627A (en) * | 1994-12-28 | 1996-07-16 | Kandenko Co Ltd | Wiring checker and wiring detection method for plug socket |
| JP2006038707A (en) * | 2004-07-28 | 2006-02-09 | Tempearl Ind Co Ltd | Polarity checking device of plug socket with earth electrode |
| JP2017207313A (en) * | 2016-05-17 | 2017-11-24 | 株式会社中電工 | Connection confirmation tester and connection confirmation test method |
| JP2021067530A (en) * | 2019-10-21 | 2021-04-30 | 河村電器産業株式会社 | Power distribution board connection inspection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625272B2 (en) * | 1975-11-14 | 1981-06-11 |
-
1990
- 1990-11-22 JP JP2316065A patent/JPH04188085A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625272B2 (en) * | 1975-11-14 | 1981-06-11 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08184627A (en) * | 1994-12-28 | 1996-07-16 | Kandenko Co Ltd | Wiring checker and wiring detection method for plug socket |
| JP2006038707A (en) * | 2004-07-28 | 2006-02-09 | Tempearl Ind Co Ltd | Polarity checking device of plug socket with earth electrode |
| JP2017207313A (en) * | 2016-05-17 | 2017-11-24 | 株式会社中電工 | Connection confirmation tester and connection confirmation test method |
| JP2021067530A (en) * | 2019-10-21 | 2021-04-30 | 河村電器産業株式会社 | Power distribution board connection inspection device |
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