JPH02142319A - Disconnection detector for grounding conductor for transformer - Google Patents
Disconnection detector for grounding conductor for transformerInfo
- Publication number
- JPH02142319A JPH02142319A JP63294396A JP29439688A JPH02142319A JP H02142319 A JPH02142319 A JP H02142319A JP 63294396 A JP63294396 A JP 63294396A JP 29439688 A JP29439688 A JP 29439688A JP H02142319 A JPH02142319 A JP H02142319A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- transformer
- disconnection
- grounding conductor
- capacitors
- 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
- 239000004020 conductor Substances 0.000 title abstract 6
- 238000001514 detection method Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 abstract description 13
- 238000004804 winding Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Transformers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、変圧器の２次側出力の接地相に接続された接
地線が断線したことを検出し得る断線検出装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disconnection detection device capable of detecting disconnection of a ground wire connected to the ground phase of the secondary output of a transformer.
第３図は、２種接地が行なわれている高圧−低圧降圧用
変圧器の結線図である。図において、１は高圧−低圧用
変圧器、ａ １． ａ ２は１次側入力端子、ｂ １
、 ｂ ２ 、 ｂ ａは２次側出力端子、２は
接地相となっている出力端子ｂ２と大地間との間に接続
されている接地線である。FIG. 3 is a wiring diagram of a high-voltage-low-voltage step-down transformer in which type 2 grounding is performed. In the figure, 1 is a high voltage-low voltage transformer, a 1. a 2 is the primary side input terminal, b 1
, b 2 , b a are secondary side output terminals, and 2 is a grounding wire connected between the output terminal b2, which is the ground phase, and the ground.
そして、入力端子ａｌ、ａ２間には６．６ＫＶＯ高電圧
が入力され、出力端子ｂ １ 、ｂ ａ間に２１０Ｖ、
出力端子ｂ１．ｂ２間及び出力端子ｂ ２ 、 ｂ
ａ間に１０５■が出力されるようになっている。Then, 6.6KVO high voltage is input between the input terminals al and a2, and 210V is input between the output terminals b 1 and b a.
Output terminal b1. b2 and output terminals b2, b
105■ is output between a.
このような変圧器１に用いられる接地線２が断線してい
るか否かについては、従来、保守作業員が第３図のＡ、
Ｂ間の電圧をテスタ等で計測することによって検査する
こととしていた。Conventionally, maintenance workers have to check whether or not the grounding wire 2 used in such a transformer 1 is disconnected.
The test was to be carried out by measuring the voltage between B with a tester or the like.
しかし、経験上、接地線２が断線するような事態は極め
て稀にしか起らないものと考えられているため、接地線
２についての断線検査も稀にしか行なわれないのが通常
であった。そのため、もし、接地線２の断線が発生した
場合には、この断線がかなりの期間にわたって看過され
てしまうおそれがある。However, based on experience, it is believed that a situation in which the ground wire 2 is disconnected is extremely rare, and therefore, the disconnection test for the ground wire 2 is usually only performed on rare occasions. . Therefore, if a break in the grounding wire 2 occurs, there is a risk that this break will be overlooked for a considerable period of time.
そして、このようなときに、変圧器１の１次側と２次側
との間に充填されている絶縁材料にクラック等が発生し
、絶縁性能が損なわれていた場合には、いわゆる高圧低
圧間の混触が生じ、２次側出力が高圧に誘導されてしま
うことになる。そのため、変圧器１の２次側に接続され
ている機器が損傷するおそれ、あるいは人身事故が発生
するおそれ等があったのである。In such a case, if cracks occur in the insulating material filled between the primary and secondary sides of the transformer 1 and the insulation performance is impaired, the so-called high-voltage and low-voltage This will result in the secondary side output being induced to high pressure. Therefore, there was a risk that equipment connected to the secondary side of the transformer 1 would be damaged, or that personal injury would occur.
本発明は、上記事情に鑑みてなされてものであり、接地
線が断線した場合に、速やかにその断線を検出すること
ができ、変圧器使用に際しての安全性をより向上させる
ことができる変圧器用接地線の断線検出装置を提供する
ことを目的としている。The present invention has been made in view of the above-mentioned circumstances, and provides a transformer that can promptly detect the disconnection of a ground wire when the ground wire is disconnected, thereby further improving safety when using the transformer. The object of the present invention is to provide a grounding wire disconnection detection device.
〔課題を解決するための手段〕
本発明は、上記課題を解決するための手段として、接地
線と並列に接続され、この接地線が断線したときに、接
地相及び大地間に生じる電圧を所定の割合に分圧して供
給する電圧供給手段と、電圧供給手段から供給される電
圧を検出し、この検出に基づいて断線検出信号を出力す
る電圧検出手段と、を備えた構成としである。[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention provides a method for controlling the voltage generated between the ground phase and the ground when the grounding wire is connected in parallel with the grounding wire and the grounding wire is disconnected. This configuration includes a voltage supply means that divides the voltage into a proportion of and supplies the voltage, and a voltage detection means that detects the voltage supplied from the voltage supply means and outputs a disconnection detection signal based on this detection.
上記構成において、接地線が断線すると、変圧器の接地
相と大地との間に電圧が生じることになる。したがって
、接地線と並列に接続されている電圧供給手段に電圧が
印加されることになるが、電圧供給手段はこの電圧を所
定の割合に分圧する。In the above configuration, if the ground wire is disconnected, a voltage will be generated between the ground phase of the transformer and the earth. Therefore, a voltage is applied to the voltage supply means connected in parallel with the ground line, and the voltage supply means divides this voltage into predetermined ratios.
電圧検出手段は、この所定電圧を検出して、断線検出信
号を出力する。The voltage detection means detects this predetermined voltage and outputs a disconnection detection signal.
以下、本発明の実施例を第１図及び第２図に基づいて説
明する。但し、第３図と同様の構成要素には同一符号を
付することとし、その重複した説明を省略する。Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. However, the same components as in FIG. 3 are designated by the same reference numerals, and their redundant explanation will be omitted.
変圧器１の接地相となっている出力端子ｂ２と大地との
間には２つのコンデンサＣＬ、Ｃ２が接続されて電圧供
給手段３を構成している。この電圧供給手段３は接地線
２と並列に接続された状態となっている。Two capacitors CL and C2 are connected between the output terminal b2, which is the ground phase of the transformer 1, and the earth, forming a voltage supply means 3. This voltage supply means 3 is connected in parallel with the grounding line 2.
これらコンデンサＣ１，Ｃ２のうちコンデンサＣ１の両
端に計器用変圧器ＰＴの１次側が接続されている。そし
て、計器用変圧器ＰＴの２次側には電圧検出器４が接続
されており、この計器用変圧器ＰＴと電圧検出器４とで
電圧検出手段５が構成されている。Of these capacitors C1 and C2, the primary side of a potential transformer PT is connected to both ends of the capacitor C1. A voltage detector 4 is connected to the secondary side of the potential transformer PT, and the voltage detecting means 5 is constituted by the potential transformer PT and the voltage detector 4.
次に、以上のように構成される本実施例の動作について
説明する。Next, the operation of this embodiment configured as above will be explained.
接地線２が断線されていない場合、ＤＥ間は接地！ｓ２
により短絡されているため電位差を生じることはない。If ground wire 2 is not disconnected, DE is grounded! s2
Because they are short-circuited, no potential difference occurs.
したがって、電圧供給手段３の両端に電圧が発生するこ
とはなく、電圧検出手段５も作動することはない。Therefore, no voltage is generated across the voltage supply means 3, and the voltage detection means 5 does not operate.
ところが、接地線２が断線した場合は、ＤＥ間は、もは
や短絡状態ではないため電位差を生じることになる。そ
して、コンデンサＣＩ 、 Ｃ２には、このＤＥ間に
生じる電圧が所定の割合で分圧され、その結果コンデン
サＣ１の両端には分圧された電圧が発生する。However, if the ground wire 2 is disconnected, a potential difference will occur between the DEs since they are no longer in a short-circuited state. The voltage generated between DE is divided into capacitors CI and C2 at a predetermined ratio, and as a result, a divided voltage is generated across capacitor C1.
計器用変圧器ＰＴは、この分圧された電圧を検出して出
力信号を電圧検出器４に送り、電圧検出器４はこの出力
信号を増幅して外部回路（図示せず）に断線検出信号を
出力する。Potential transformer PT detects this divided voltage and sends an output signal to voltage detector 4, which amplifies this output signal and sends a disconnection detection signal to an external circuit (not shown). Output.
外部回路では、この断線検出信号によって、例えばリレ
ー等を介して警報回路が作動するようになっている。そ
して、保守作業員は、この警報回路から発せられる警報
信号によって、直ちに接地線２が断線しｔこことを知る
ことができる。In the external circuit, this disconnection detection signal activates an alarm circuit via, for example, a relay. The maintenance worker can immediately know that the grounding wire 2 is disconnected by the alarm signal issued from the alarm circuit.
第２図は、本発明の他の実施例を示すもので、変圧器１
がΔ−Δ結線されており、６．６ＫＶの入力電圧を２１
０ｖに降圧するものである場合を示している。FIG. 2 shows another embodiment of the present invention, in which a transformer 1
are connected Δ-Δ, and the input voltage of 6.6KV is 21
The case where the voltage is lowered to 0V is shown.
なお、上記実施例では電圧供給手段としてコンデンサＣ
，，ｔ、を用いた例を示したが、接地線２が断線した時
にＤＥ間に電圧を発生し、この電圧を分圧できるもので
あれば、これらのコンデンサＣ１，Ｃ２の代りに半導体
等の素子を用いることとしてもよい。In the above embodiment, the capacitor C is used as the voltage supply means.
,,t, but if the voltage is generated between DE and DE when the grounding wire 2 is disconnected, and this voltage can be divided, semiconductors or the like can be used instead of these capacitors C1 and C2. It is also possible to use an element of
以上説明したように、本発明によれば、接地線が断線し
たときに、接地相及び大地間に生じる電圧を所定の割合
に分圧して供給する電圧供給手段を接地線と並列に接続
し、この供給される電圧を検出することによって断線検
出信号を出力する電圧検出手段を備えた構成としたので
、接地線が断線した場合に、速やかにその断線を検出す
ることができ、変圧器使用に際しての安全性をより向上
させることが可能になる。As explained above, according to the present invention, when the grounding wire is disconnected, the voltage supply means that divides the voltage generated between the grounding phase and the ground into a predetermined ratio and supplies the divided voltage is connected in parallel with the grounding wire, Since the configuration is equipped with a voltage detection means that outputs a disconnection detection signal by detecting this supplied voltage, when the grounding wire is disconnected, the disconnection can be detected immediately, and when using the transformer. This makes it possible to further improve safety.
１・・・変圧器、２・・・接地線、 ４・・・電圧検出手段。1...Transformer, 2...Grounding wire, 4... Voltage detection means.
Claims (1)
器において、 前記接地線と並列に接続され、該接地線が断線したとき
に、前記接地相及び大地間に生じる電圧を所定の割合に
分圧して供給する電圧供給手段と、前記電圧供給手段か
ら供給される電圧を検出し、該検出に基づいて断線検出
信号を出力する電圧検出手段と、 を備えたことを特徴とする変圧器用接地線の断線検出装
置。[Scope of Claims] In a transformer in which a grounding wire is connected between a grounding phase of a secondary output and the ground, the grounding wire is connected in parallel with the grounding wire, and when the grounding wire is disconnected, the grounding wire is connected between the grounding phase and the ground. a voltage supply means for dividing and supplying a voltage generated at a predetermined ratio; and a voltage detection means for detecting the voltage supplied from the voltage supply means and outputting a disconnection detection signal based on the detection. A disconnection detection device for a grounding wire for a transformer, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63294396A JPH02142319A (en) | 1988-11-21 | 1988-11-21 | Disconnection detector for grounding conductor for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63294396A JPH02142319A (en) | 1988-11-21 | 1988-11-21 | Disconnection detector for grounding conductor for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02142319A true JPH02142319A (en) | 1990-05-31 |
Family
ID=17807194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63294396A Pending JPH02142319A (en) | 1988-11-21 | 1988-11-21 | Disconnection detector for grounding conductor for transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02142319A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6518814B1 (en) | 1999-12-28 | 2003-02-11 | Koninklijke Philips Electronics N.V. | High-voltage capacitor voltage divider circuit having a high-voltage silicon-on-insulation (SOI) capacitor |
| JP2008026089A (en) * | 2006-07-20 | 2008-02-07 | Hioki Ee Corp | Noncontact phase detection system |
| CN102890222A (en) * | 2012-10-17 | 2013-01-23 | 南京国电南自美卓控制系统有限公司 | Method for judging breaking of PT (potential transformer) in fast switch |
-
1988
- 1988-11-21 JP JP63294396A patent/JPH02142319A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6518814B1 (en) | 1999-12-28 | 2003-02-11 | Koninklijke Philips Electronics N.V. | High-voltage capacitor voltage divider circuit having a high-voltage silicon-on-insulation (SOI) capacitor |
| JP2008026089A (en) * | 2006-07-20 | 2008-02-07 | Hioki Ee Corp | Noncontact phase detection system |
| CN102890222A (en) * | 2012-10-17 | 2013-01-23 | 南京国电南自美卓控制系统有限公司 | Method for judging breaking of PT (potential transformer) in fast switch |
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