JPH04184272A - Insulation diagnosis circuit and device - Google Patents
Insulation diagnosis circuit and deviceInfo
- Publication number
- JPH04184272A JPH04184272A JP31559490A JP31559490A JPH04184272A JP H04184272 A JPH04184272 A JP H04184272A JP 31559490 A JP31559490 A JP 31559490A JP 31559490 A JP31559490 A JP 31559490A JP H04184272 A JPH04184272 A JP H04184272A
- Authority
- JP
- Japan
- Prior art keywords
- insulation
- voltage
- transformer
- circuit
- component
- 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.)
- Granted
Links
- 238000009413 insulation Methods 0.000 title claims description 40
- 238000003745 diagnosis Methods 0.000 title claims description 7
- 238000012360 testing method Methods 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000002405 diagnostic procedure Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 239000012212 insulator Substances 0.000 description 25
- 230000006866 deterioration Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000002542 deteriorative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 240000005572 Syzygium cordatum Species 0.000 description 2
- 235000006650 Syzygium cordatum Nutrition 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、高電圧用として使用されている開閉器や変
圧器やコンデンサ等の機器、およびケーブル等の絶縁診
断をするため、交流電圧課電時の直流成分と交流電圧課
電に直流電圧をバイアスした時の直流成分の増大量の大
小により絶縁診断を行う回路および装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to the AC voltage division for diagnosing the insulation of equipment such as switches, transformers, and capacitors used for high voltage, and cables. The present invention relates to a circuit and a device for performing insulation diagnosis based on the magnitude of the increase in the DC component when the DC voltage is applied and when the DC voltage is biased when applying the AC voltage.
［従来の技術］
高電圧用として使用されている開閉器１変圧器またはコ
ンデンサ等の機器、およびケーブル等の絶縁診断方法と
しては直流電圧試験法がある。この方法では、高電圧用
機器に絶縁劣化が生ずると、その劣化部分からの漏れ電
流を測定しているため、絶縁体が破壊したり、劣化部分
に直流電圧の残留電荷が残り試験終了時に接地した際、
残留電荷から劣化部分に水トリーや電気トリー等が発生
して絶縁劣化を促進し、試験終了後に交流使用電圧を印
加した際に絶縁体を破壊する等の問題がある。[Prior Art] As a method for diagnosing the insulation of devices such as switch 1 transformers and capacitors used for high voltage, and cables, there is a DC voltage testing method. With this method, when insulation deterioration occurs in high-voltage equipment, the leakage current from the deteriorated part is measured, so there is a possibility that the insulator will break down or a residual DC voltage charge will remain in the deteriorated part and it will be grounded at the end of the test. When I did,
There are problems such as water trees, electric trees, etc. occurring in deteriorated parts due to residual charge, accelerating insulation deterioration, and destroying the insulator when AC working voltage is applied after the test.
［発明が解決しようとする問題点］
上記従来方法によると、機器の絶縁診断のため機器を破
壊させ、復旧のための停電が問題となる上に軽度な劣化
状態を劣化促進させてしまう問題があった。[Problems to be Solved by the Invention] According to the above-mentioned conventional method, there are problems in that the equipment is destroyed for insulation diagnosis of the equipment, a power outage is required for restoration, and a mild state of deterioration is accelerated. there were.
［課題を解決するための手段］
この発明の目的は、上記した従来技術の問題点を解消し
、高電圧用として使用されている開閉器、変圧器または
コンデンサ等の機器、およびケーブル等の絶縁診断をす
るため、線路を停止し、この発明の絶縁診断回路で試験
用交流トランスの２次コイルの低電圧側から直列に組込
まれたバイパスコンデンサと並列に組込まれたプロワキ
ングコイルもしくは保護抵抗を通して直流電源を組込み
、交流電圧に直流電圧をバイアスし、直流電源とアース
間に直流成分測定器を組込んで直流成分として検出する
構成とし、被測定体に交流常規電圧を課電しながら直流
電源とアース間から交流課電時の直流成分と直流課電直
流バイアス時の直流成分を測定できるようにすることで
、２２ｋＶ以上の送配電線路等の多点接地系での交流課
電時の直流成分を測定できるようにした。[Means for Solving the Problems] An object of the present invention is to solve the problems of the prior art described above, and to improve the insulation of devices such as switches, transformers, or capacitors, and cables used for high voltage. In order to perform diagnosis, the line is stopped, and the insulation diagnostic circuit of the present invention is used to connect the bypass capacitor built in series from the low voltage side of the secondary coil of the AC transformer for testing, and the proworking coil or protection resistor built in parallel. A DC power supply is built in through the DC voltage, the DC voltage is biased to the AC voltage, and a DC component measuring device is installed between the DC power supply and the ground to detect the DC component. By making it possible to measure the DC component when AC voltage is applied and the DC component during DC bias when DC voltage is applied between the power supply and the ground, it is possible to measure the DC component when AC voltage is applied and the DC component when DC bias is applied. It is now possible to measure DC components.
また、この発明は、高電圧用として使用されている開閉
器、変圧器またはコンデンサ等の機器、およびケーブル
等の絶縁診断をするため、線路を停止し、この発明の絶
縁診断用トランスによって常規交流電圧を課電して２次
コイル低圧側からフィルターを介して直流成分を測定す
ることができるようにトランス筐体内に油中ブッシング
を設け、交流電圧課電時の直流成分を測定できるように
した絶縁診断装置である。In addition, the present invention provides an insulation diagnostic test for high voltage devices such as switches, transformers, capacitors, etc., as well as cables. In order to be able to apply voltage and measure the DC component from the low-voltage side of the secondary coil through a filter, we installed a bushing submerged in oil inside the transformer housing, making it possible to measure the DC component when AC voltage is applied. It is an insulation diagnostic device.
さらにバイパスコンデンサを設置し、直流電圧を印加で
きるようにし、直流電圧をバイアスさせたときに、被測
定体が発生する直流電流より小さな漏洩電流とするため
、２次コイル低電圧側および１次コイルと２次コイル間
のサポート材料を含水性のない絶縁物で構成する。その
上、２次コイル高電圧ブッシングも油中化することで高
電圧側からの漏洩電流を少なくすることで、被測定体に
直流電圧をバイアスしたときの直流成分の増大量の大小
が判別できるようにした試験トランスを供給することで
絶縁診断を可能にする。In addition, a bypass capacitor is installed so that DC voltage can be applied, and when the DC voltage is biased, the leakage current is smaller than the DC current generated by the device under test. The support material between the secondary coil and the secondary coil is made of a water-free insulator. In addition, the secondary coil high voltage bushing is also submerged in oil to reduce leakage current from the high voltage side, making it possible to determine the magnitude of increase in DC component when biasing DC voltage to the measured object. Insulation diagnosis is made possible by supplying a test transformer with this type of test transformer.
［作 用］
この発明の絶縁診断回路構成は、交流電圧課電時の直流
成分と交流電圧に微弱な直流電圧をバイアスした時の直
流成分を測定することで、交流課電により活性化した絶
縁体での劣化現象からのシグナルを微弱な直流電圧で増
大させて測定できる。このことで絶縁体の絶縁破壊を防
止し、さらに絶縁体を劣化させずに絶縁体の劣化状態を
診断することができる絶縁診断回路を提供できる。[Function] The insulation diagnostic circuit configuration of the present invention measures the DC component when AC voltage is applied and the DC component when a weak DC voltage is biased to AC voltage, thereby detecting the insulation activated by AC voltage application. Signals from deterioration phenomena in the body can be increased and measured using a weak DC voltage. This makes it possible to provide an insulation diagnostic circuit that can prevent dielectric breakdown of the insulator and diagnose the deterioration state of the insulator without deteriorating the insulator.
また、この発明の絶縁診断装置は、試験用トランスの２
次コイル低電圧側直流バイアス油中ブッシングおよび高
電圧側油中ブッシングを設置し、被測定体に交流常規電
圧を課電しながら２次コイル低電圧側から交流課電時の
直流成分を測定できるようにすることで、２２ｋＶ以上
の送配電線路等の多点接地系での交流課電時の直流成分
を測定できるようにした。Further, the insulation diagnostic device of the present invention has two parts for testing transformers.
By installing a DC bias bushing in oil on the low voltage side of the secondary coil and a bushing in oil on the high voltage side, it is possible to measure the DC component when AC voltage is applied from the low voltage side of the secondary coil while applying AC normal voltage to the object to be measured. By doing so, it is possible to measure the DC component when AC current is applied in a multi-point grounding system such as a 22kV or higher transmission/distribution line.
さらに交流課電に微弱な直流電圧をバイアスすることで
、交流課電により活性化した絶縁体での劣化現象からの
シグナルを微弱な直流電圧で増大させて測定することが
できる。そのため絶縁体への悪影響を防止し、さらに絶
縁体を劣化させずに絶縁体の劣化状態を診断することが
できる絶縁詑断装置を提供できる。Furthermore, by applying a weak DC voltage as a bias to the AC voltage application, it is possible to amplify and measure the signal from the deterioration phenomenon in the insulator activated by the AC voltage application. Therefore, it is possible to provide an insulation cutting device that can prevent an adverse effect on the insulator and further diagnose the deterioration state of the insulator without deteriorating the insulator.
［実 施 例］ 以下１、この発明の実施例を図面を参照して説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.
第１図および第２図は、この発明に係る絶縁診断回路の
具体的な実施例を示すブロック回路図である。1 and 2 are block circuit diagrams showing specific embodiments of the insulation diagnostic circuit according to the present invention.
第１図において、試験用交流トランスｌの低電圧側から
直列にバイパスコンデンサ２を組込み、並列に保護抵抗
１４を組込んだ後に交流・直流バイアス切換えスイッチ
４と極性切換えスイッチ６を組込み、さらに極性切換え
スイッチ６に直流電源５を組込み、この直流電源５とア
ース間に直流成分測定器７を組込み直流成分として検出
する回路を構成し、被測定体１２の交流課電時および交
流課電直流バイアス時の直流成分をＣＰＬＩ８に記憶し
、この記憶したデータを処理して、ＣＲＴ９に表示し、
また、プリンタ１０にプリントアウトする回路構成とす
る。In Fig. 1, a bypass capacitor 2 is installed in series from the low voltage side of a test AC transformer l, a protective resistor 14 is installed in parallel, an AC/DC bias changeover switch 4 and a polarity changeover switch 6 are installed, and then a polarity changeover switch 4 is installed. A DC power supply 5 is installed in the changeover switch 6, and a DC component measuring device 7 is installed between the DC power supply 5 and the ground to constitute a circuit that detects the DC component, and when AC power is applied to the object 12 to be measured and when AC voltage is applied to the DC bias. The DC component of time is stored in the CPLI 8, this stored data is processed and displayed on the CRT 9,
Further, the circuit configuration is such that the printout is performed on the printer 10.
第２図は、試験用交流トランスｌの低電圧側から直列に
バイパスコンデンサ２を組込み、並列にブロッキングコ
イル１５を組込んだ後に交流・直流バイアス切換えスイ
ッチ４と極性切換えスイッチ６を組込み、さらに極性切
換えスイッチ６に直流電源５を組込み、この直流電源５
とアース間に直流成分測定器７を組込み直流成分として
検出する回路を構成し、被測定体１２の交流課電時およ
び交流課電直流バイアス時の直流成分をＣＰＵ８に記憶
し、記憶したデータを処理してＣＲＴ９に表示し、また
、プリンタ１０にプリントアウトする回路構成とする。In Figure 2, a bypass capacitor 2 is installed in series from the low voltage side of a test AC transformer l, a blocking coil 15 is installed in parallel, an AC/DC bias changeover switch 4 and a polarity changeover switch 6 are installed, and then a polarity changeover switch 4 is installed. A DC power supply 5 is built into the changeover switch 6, and this DC power supply 5
A DC component measuring device 7 is installed between the ground and the DC component, and a circuit for detecting the DC component is configured, and the DC component is stored in the CPU 8 when AC current is applied to the object 12 to be measured and when AC voltage is applied and DC bias is applied, and the stored data is stored in the CPU 8. The circuit configuration is such that the data is processed and displayed on the CRT 9 and printed out on the printer 10.
記憶したデータ処理においては、交流課電時の直流成分
で劣化極性を判定するようにし、交流課電直流バイアス
に増大量の大小によって劣化の程度までを判定診断する
ことが可能である。In the stored data processing, the polarity of deterioration is determined based on the DC component during AC voltage application, and it is possible to determine and diagnose the degree of deterioration based on the magnitude of the increase in the AC voltage application DC bias.
次に、この発明の絶縁診断装置の実施例を第３図を参照
して説明する。第３図は、この発明に係る絶縁診断試験
用トランス１の具体的な構成を示す説明図である。この
図において、サポート絶縁物２１は高耐電圧材（例えば
含水性のない、磁器、セラミック、ポリエチレン樹脂、
エポキシ樹脂等）で構成され、２次コイル２２は、コイ
ルの周りにコイル絶縁物２３を施し、１次コイル２４が
設けられサポート絶縁物２１の上に設置されている。こ
の２次コイル２２の高電圧側は高電圧ブッシング２５に
接続され、低電圧側は低電圧ブッシング２８に接続され
る。２次コイル低電圧側２２と低電圧ブッシング２８の
間の接続綿２６も絶縁被覆を施す。１次コイル２４と電
源ブッシング３１の接続は、２次コイル２２と低電圧ブ
ッシング２８の接続線２６と一定以上の距離を持たせて
構成することで絶縁する。高電圧ブッシング２５と低電
圧ブッシング２８にはそれぞれケーブル３０によって接
続される。このケーブル３０はストレスコーン２７が設
けられ絶縁される。そして、筐体３３内に充填される絶
縁油３２は、高温高真空状態（９０℃、１／１００ｍｍ
Ｈｇ以下）で高温高真空処理された絶縁油（ＯＦ油等）
を注入する。さらに絶縁油３２の温度膨張を吸収するガ
ス室２９を筐体３３上に設け、このガス室２９には乾燥
窒素等不活性ガスで正圧（０，２〜０．５ｋｇ／ｃｍ”
Ｇ）に密閉する。Next, an embodiment of the insulation diagnostic device of the present invention will be described with reference to FIG. FIG. 3 is an explanatory diagram showing a specific configuration of the insulation diagnostic test transformer 1 according to the present invention. In this figure, the support insulator 21 is made of a high voltage withstand material (for example, non-hydrous porcelain, ceramic, polyethylene resin,
The secondary coil 22 is made of epoxy resin, etc., and a coil insulator 23 is applied around the coil, and a primary coil 24 is provided and installed on the support insulator 21. The high voltage side of this secondary coil 22 is connected to a high voltage bushing 25, and the low voltage side is connected to a low voltage bushing 28. The connecting cotton 26 between the secondary coil low voltage side 22 and the low voltage bushing 28 is also provided with an insulating coating. The connection between the primary coil 24 and the power bushing 31 is insulated by maintaining a certain distance or more from the connection line 26 between the secondary coil 22 and the low voltage bushing 28. The high voltage bushing 25 and the low voltage bushing 28 are connected by cables 30, respectively. This cable 30 is provided with a stress cone 27 and insulated. The insulating oil 32 filled in the housing 33 is kept in a high temperature, high vacuum state (90°C, 1/100mm
Insulating oil (OF oil, etc.) that has been treated at high temperature and high vacuum with Hg or less
inject. Furthermore, a gas chamber 29 is provided on the housing 33 to absorb the temperature expansion of the insulating oil 32, and this gas chamber 29 is filled with an inert gas such as dry nitrogen under positive pressure (0.2 to 0.5 kg/cm").
G).
上記の構成により、１次コイル２４と２次コイル２２の
間、および２次コイル２２と筺体３３の間で高度な絶縁
抵抗の絶縁診断試験用トランスが構成され、前記試験用
トランスの２次コイル低電圧側直流バイアス油中ブッシ
ングおよび高電圧側油中ブッシングを設置し、被測定体
に交流常規電圧を課電しながら２次コイル低電圧側から
交流課電時の直流成分を測定できるようにすることで、
２２ｋＶ以上の送配電線路等の多点接地系での交流課電
時の直流成分を測定できるようにしたものである。With the above configuration, an insulation diagnostic test transformer with high insulation resistance is configured between the primary coil 24 and the secondary coil 22 and between the secondary coil 22 and the casing 33, and the secondary coil of the test transformer is A low-voltage side DC bias oil-immersed bushing and a high-voltage side oil-immersed bushing are installed to enable measurement of the DC component when AC voltage is applied from the secondary coil low voltage side while applying AC normal voltage to the object to be measured. by doing,
It is designed to measure DC components when AC power is applied in multi-point grounding systems such as transmission and distribution lines of 22 kV or higher.
第２図は、この発明に係る絶縁診断試験用トランス１を
使用した絶縁診断回路のブロック回路図である。既に説
明したように、試験トランス１により、リードケーブル
１１を通じ、被測定体１２に交流電圧を課電し、切換ス
イッチ６の切換えにより交流課電時の直流成分を直流成
分測定器７により測定し、ＣＰＵ８に記憶する。さらに
交流課電直流バイアス時の直流成分を測定するため、切
換スイッチ６を切換え、直流電源５からブロックキング
コイル１５を通じ、バイパスコンデンサ２によりフロー
ティングさせ、直流電圧をバイアスする。その時の直流
成分を直流成分測定器７により測定し、ＣＰＵ８に記憶
する。ＣＰＵ８による記憶データの処理結果に基づいて
、ＣＲＴ９に表示したり、プリンター１０でプリントア
ウトするように構成されている。交流課電時の直流成分
で劣化極性を判定し、交流課電直流バイアスに増大量の
大小によって劣化の程度までを判定診断することができ
るためである。FIG. 2 is a block circuit diagram of an insulation diagnostic circuit using the insulation diagnostic test transformer 1 according to the present invention. As already explained, an AC voltage is applied to the object to be measured 12 through the lead cable 11 by the test transformer 1, and by switching the changeover switch 6, the DC component when AC voltage is applied is measured by the DC component measuring device 7. , is stored in the CPU 8. Furthermore, in order to measure the DC component when AC current is applied and DC bias is applied, the changeover switch 6 is switched, the DC power supply 5 is passed through the block king coil 15, and the DC voltage is floated by the bypass capacitor 2 to bias the DC voltage. The DC component at that time is measured by the DC component measuring device 7 and stored in the CPU 8. Based on the results of processing the stored data by the CPU 8, the data is displayed on the CRT 9 or printed out using the printer 10. This is because the polarity of deterioration can be determined from the DC component during AC voltage application, and the degree of deterioration can be determined and diagnosed based on the magnitude of the increase in the AC voltage application DC bias.
［発明の効果］
以上説明したとおり、この発明に係る絶縁診断回路によ
れば、水トリー劣化によって生じる２２ｋＶ以上の送配
電線路等の多点接地系での交流課電時の直流成分を測定
できるようにし、劣化極性を判定する。[Effects of the Invention] As explained above, according to the insulation diagnostic circuit according to the present invention, it is possible to measure the DC component caused by water tree deterioration when AC current is applied in a multi-point grounding system such as a transmission/distribution line of 22 kV or more. and determine the polarity of deterioration.
さらに交流課電に微弱な直流電圧をバイアスすることで
、交流課電により活性化した絶縁体での劣化現象からの
シグナルを微弱な直流電圧で増大させて８り定すること
ができ、交流課電直流バイアス時の直流成分の増大量の
大小によって、絶縁体の劣化状態を判定できる。そのた
め絶縁体の絶縁破壊を防止し、さらに絶縁体を劣化させ
ずに絶縁体の劣化状態を診断することができる絶縁診断
回路を提供することができ、数々の優れた特徴を発揮す
ることができる。Furthermore, by biasing the AC voltage with a weak DC voltage, the signal from the deterioration phenomenon in the insulator activated by the AC voltage can be amplified by the weak DC voltage and determined. The state of deterioration of the insulator can be determined based on the amount of increase in the DC component during electric current bias. Therefore, it is possible to provide an insulation diagnostic circuit that can prevent dielectric breakdown of the insulator and diagnose the deterioration state of the insulator without deteriorating the insulator, and can exhibit a number of excellent features. .
また、この発明に係る絶縁診断試験用トランスを組み込
んだ診断装置によれば、水トリー劣化によって生じる２
２ｋＶ以上の送配電線路等の多点接地系での交流課電の
直流成分を測定できるようにし、劣化極性を判定する。Furthermore, according to the diagnostic device incorporating the transformer for insulation diagnostic testing according to the present invention, the
It is possible to measure the DC component of AC current applied in a multi-point grounding system such as a 2kV or higher transmission/distribution line, and determine the polarity of deterioration.
さらに交流課電に微弱な直流電圧をバイアスすることで
、交流課電により活性化した絶縁体での劣化現象からの
シグナルを微弱な直流電圧で増大させて測定することが
でき、交流課電直流バイアス時の直流成分の増大量の大
小によって、絶縁体の劣化状態を判定できる。そのため
絶縁体への悪影響を防止し、さらに絶縁体を劣化させず
に絶縁体の劣化状態を診断することができる絶縁診断装
置を提供することができる等の優れた特徴を発揮するこ
とができる。Furthermore, by biasing a weak DC voltage to the AC voltage, it is possible to increase the signal from the deterioration phenomenon in the insulator activated by the AC voltage and measure it. The state of deterioration of the insulator can be determined based on the amount of increase in the DC component during bias. Therefore, it is possible to exhibit excellent features such as being able to provide an insulation diagnostic device that can prevent adverse effects on the insulator and further diagnose the deterioration state of the insulator without deteriorating the insulator.
第１図および第２図は、この発明に係る絶縁診断回路構
成の具体例を示すブロック回路図。
第３図は、この発明に係る絶縁診断装置試験トランスの
具体例を示す説明図である。
１・・・試験用交流トランス
２・・・バイパスコンデンサ
４・・・交流・直流バイアス切換えスイッチ５・・・直
流電源 ６・・・極性切換えスイッチ７・・・直
流成分測定器 ８・・・ＣＰＵ９・・・ＣＲＴ
１０・・・プリンタ１１・・・リードケーブル
１２・・・被測定体 ２１・・・サポート絶縁物２
２・・・２次コイル ２３・・・コイル絶縁物２４・
・・１次コイル ２５・・・高電圧ブッシング２６・
・・絶縁被覆 ２７・・・ストレスコーン２８・・
・低電圧ブッシング
２９・・・ガス室 ３０・・・ケーブル３１・・
・電源ブッシング
３２・・・絶縁油 ３３・・・筐体特許出願人
日立電線株式会社1 and 2 are block circuit diagrams showing specific examples of the insulation diagnostic circuit configuration according to the present invention. FIG. 3 is an explanatory diagram showing a specific example of the insulation diagnostic device test transformer according to the present invention. 1... AC transformer for testing 2... Bypass capacitor 4... AC/DC bias switching switch 5... DC power supply 6... Polarity switching switch 7... DC component measuring device 8... CPU 9 ...CRT
10... Printer 11... Lead cable 12... Measured object 21... Support insulator 2
2... Secondary coil 23... Coil insulator 24.
・Primary coil 25・High voltage bushing 26・
...Insulating coating 27...Stress cone 28...
・Low voltage bushing 29...Gas chamber 30...Cable 31...
・Power bushing 32...Insulating oil 33...Casing patent applicant
Hitachi Cable Co., Ltd.
Claims (5)
用交流トランスの２次コイル低電圧側から直列に組込ま
れたバイパスコンデンサと並列に組込まれたブロッキン
グコイル、もしくは保護抵抗を通して直流電源を組込み
、直流電源とアース間に交流フィルタを組込み直流成分
として検出する構成の絶縁診断回路。(1) In a circuit for insulation diagnosis of high voltage equipment, a DC power supply is installed through a blocking coil installed in parallel with a bypass capacitor installed in series from the low voltage side of the secondary coil of a test AC transformer, or through a protective resistor. , an insulation diagnostic circuit configured to incorporate an AC filter between the DC power supply and ground to detect DC components.
において、直流電源とバイパスコンデンサのアース側を
接続し、アース間に交流フィルタを組込み直流成分とし
て検出する構成の絶縁診断回路。(2) In the circuit for diagnosing insulation as set forth in claim 1, the insulation diagnosing circuit has a configuration in which the DC power supply and the earth side of the bypass capacitor are connected, and an AC filter is installed between the earths to detect the DC component.
において、試験用交流トランスの２次コイル低電圧側か
ら直列に組込まれたバイパスコンデンサと並列に組込ま
れたブロッキングコイルもしくは保護抵抗を通して同一
直流電源の極性切換えるスイッチを組込み、直流電源と
バイパスコンデンサのアース側を接続し、アース間に交
流フィルタを組込み直流成分として検出する構成の絶縁
診断回路。(3) In the circuit for insulation diagnosis as set forth in claim 1, the secondary coil of the test AC transformer is connected from the low voltage side to the blocking coil or protective resistor installed in parallel with the bypass capacitor installed in series. An insulation diagnostic circuit that incorporates a switch to change the polarity of the same DC power supply, connects the DC power supply and the ground side of the bypass capacitor, and incorporates an AC filter between the grounds to detect the DC component.
試験用交流トランスの１次コイル用ブッシングと２次低
圧側ブッシングおよび２次高圧側ブッシングを絶縁性液
体を筐体内に充填収納した試験用交流トランスを使用す
る構成の絶縁診断装置。(4) In equipment that performs insulation diagnostic tests on high voltage equipment,
An insulation diagnostic device configured to use an AC test transformer in which a primary coil bushing, a secondary low-voltage side bushing, and a secondary high-voltage side bushing of the test AC transformer are filled and housed in a housing with an insulating liquid.
間、および１次コイルと２次コイル間に直流電圧に対す
る絶縁補強層を設けてなる上記請求項第４項記載の絶縁
診断装置。(5) The insulation diagnostic device according to claim 4, wherein an insulation reinforcing layer against DC voltage is provided between the casing and the secondary coil and between the primary coil and the secondary coil in the AC transformer for testing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2315594A JP2871075B2 (en) | 1990-11-20 | 1990-11-20 | Insulation diagnostic circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2315594A JP2871075B2 (en) | 1990-11-20 | 1990-11-20 | Insulation diagnostic circuit and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04184272A true JPH04184272A (en) | 1992-07-01 |
| JP2871075B2 JP2871075B2 (en) | 1999-03-17 |
Family
ID=18067238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2315594A Expired - Lifetime JP2871075B2 (en) | 1990-11-20 | 1990-11-20 | Insulation diagnostic circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2871075B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257306A (en) * | 2012-10-25 | 2013-08-21 | 国网电力科学研究院武汉南瑞有限责任公司 | Method for diagnosing direct current partial discharging insulation state of converter transformer and measurement system |
| CN104345254A (en) * | 2014-11-21 | 2015-02-11 | 西安伯龙高铁电气有限公司 | Train insulation detection control device |
-
1990
- 1990-11-20 JP JP2315594A patent/JP2871075B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257306A (en) * | 2012-10-25 | 2013-08-21 | 国网电力科学研究院武汉南瑞有限责任公司 | Method for diagnosing direct current partial discharging insulation state of converter transformer and measurement system |
| CN104345254A (en) * | 2014-11-21 | 2015-02-11 | 西安伯龙高铁电气有限公司 | Train insulation detection control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2871075B2 (en) | 1999-03-17 |
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