JPH0582008B2 - - Google Patents
Info
- Publication number
- JPH0582008B2 JPH0582008B2 JP6521884A JP6521884A JPH0582008B2 JP H0582008 B2 JPH0582008 B2 JP H0582008B2 JP 6521884 A JP6521884 A JP 6521884A JP 6521884 A JP6521884 A JP 6521884A JP H0582008 B2 JPH0582008 B2 JP H0582008B2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- vacuum valve
- amount
- coulombs
- contact
- 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
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明は、真空開閉装置に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to a vacuum switchgear.
従来、真空しや断器等の真空開閉装置は、第１
図に示すように主回路電流を母線から断路・接続
する主回路断路部１と、主回路電流を入、切する
ための接点部が真空容器内に封入された真空バル
ブ２と、前記接点部を開・閉するための操作機構
３により構成されている。
Conventionally, vacuum switchgears such as vacuum shields and disconnectors are
As shown in the figure, a main circuit disconnecting section 1 that disconnects and connects the main circuit current from the bus bar, a vacuum valve 2 in which a contact section for turning on and off the main circuit current is enclosed in a vacuum container, and the contact section It is composed of an operating mechanism 3 for opening and closing.
そして、この種の真空開閉装置にあつては、真
空バルブ接点が一定限度（例えば、３mm）以上消
耗した場合、主回路電流を入・切する能力が低下
するために、真空バルブ接点消耗量を監視するこ
とは極めて重要なことである。 In this type of vacuum switchgear, if the vacuum valve contact wears out beyond a certain limit (for example, 3 mm), the ability to turn on and off the main circuit current decreases, so the amount of vacuum valve contact wear is reduced. Monitoring is extremely important.
そこで従来は、真空バルブ接点に一定の面圧を
加えるワイプバネ部４において、真空バルブ接点
が正常な場合は、ワイプバネ部（真空開閉器投入
時）の詳細を示す第２図の寸法Ｌは所定寸法であ
るが、真空バルブ接点が所定寸法以上消耗した場
合、真空バルブ２のワイプバネ部４をつなぐ操作
レバー４ｂが矢印方向に長穴４ｃだけ余分に動き
（操作レバ４ａを点線で示す）、投入時のワイプバ
ネ４ａの寸法がＬからＬ＋Ｗに変化し真空バルブ
接点の消耗量をワイプバネ寸法等の変化によつて
検出していた。 Therefore, conventionally, in the wipe spring section 4 that applies a constant surface pressure to the vacuum valve contact, when the vacuum valve contact is normal, the dimension L in Fig. 2 showing the details of the wipe spring section (when the vacuum switch is closed) is a predetermined dimension. However, if the vacuum valve contact wears out beyond a predetermined size, the operating lever 4b that connects the wipe spring part 4 of the vacuum valve 2 will move an extra length in the direction of the arrow by the elongated hole 4c (the operating lever 4a is shown by a dotted line), and when the valve is turned on, The dimension of the wipe spring 4a changes from L to L+W, and the wear amount of the vacuum valve contact point is detected by the change in the wipe spring dimension.
しかし、上記の真空開閉装置にあつては、真空
バルブ接点の消耗量をチエツクするために、真空
開閉装置を直接目視チエツクしなければならず、
さらに真空バルブ接点の消耗量および残余寿命を
直接知ることができなかつた。 However, in the case of the above-mentioned vacuum switchgear, it is necessary to directly visually check the vacuum switchgear in order to check the amount of wear on the vacuum valve contacts.
Furthermore, it was not possible to directly know the amount of wear and remaining life of the vacuum valve contacts.
本発明は、以上のような従来技術の欠点を除去
するためになされたもので、真空バルブ接点の消
耗量を中央操作室等でチエツク可能とし、真空バ
ルブ接点の電気的寿命を予知することを可能にし
た真空開閉装置を提供することを目的とする。
The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and it is possible to check the amount of wear of the vacuum valve contacts in a central control room, etc., and to predict the electrical life of the vacuum valve contacts. The purpose is to provide a vacuum switchgear that makes it possible to
上記目的を達成するために、本発明は、真空開
閉装置の三相のうち少なくとも異なる二相の主回
路に、主回路電流を検出する変流器を取付け、累
積しや断クーロン量と許容しや断クーロン量を比
較・判断するマイクロコンピユータを用いて、真
空バルブ接点の電気的寿命を予知することを特徴
とする。
In order to achieve the above object, the present invention installs a current transformer for detecting the main circuit current in the main circuit of at least two different phases out of the three phases of a vacuum switchgear, and calculates the cumulative amount of sheared coulombs. It is characterized by predicting the electrical life of the vacuum valve contacts by using a microcomputer that compares and judges the amount of coulombs and the amount of broken coulombs.
以下、図面を参照しつつ本発明の一実施例を説
明する。なお、以下の図面において、第１図、第
２図と同一の部分には同一の符号を付し、その詳
細な説明を省略する。
An embodiment of the present invention will be described below with reference to the drawings. In the following drawings, the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed explanation thereof will be omitted.
第３図は、真空バルブ接点の電気的寿命を検出
する回路を持つ真空開閉装置の全体構成を示すも
のである。 FIG. 3 shows the overall configuration of a vacuum switchgear having a circuit for detecting the electrical life of the vacuum valve contacts.
第３図において、５は主回路を流れ、開閉され
る電流値を測定する変流器、６は累積しや断クー
ロン量を算出し、所定の許容しや断クーロン量と
比較し、外部に信号を送るマイクロコンピユータ
である。 In Fig. 3, 5 is a current transformer that measures the current value that flows through the main circuit and is opened and closed. 6 is a current transformer that calculates the cumulative amount of residual coulombs and compares it with a predetermined allowable amount of residual coulombs. It is a microcomputer that sends signals.
第４図に、検出回路のブロツク線図を示す。 FIG. 4 shows a block diagram of the detection circuit.
一般に真空バルブの接点消耗量は、その累積し
や断クーロン量により定まり、銅系の接点の場合
は、約100μｇ／ｃである。そのため、真空バル
ブの接点が開いてからアークが消弧するまでのア
ーク時間を多くの実測値から、その最大値（例え
ば、１サイクル）をマイクロコンピユータにイン
プツトしておけば、IikAしや断時の接点消耗量
Wiは、
Wi＝Ii×103×Ti×10-3×100×10-6〔ｇ〕
＝Ii Ti×10-4〔ｇ〕
Ti＝１〓＝20ｍｓ
（Ti：アーク時間の最大値50Hzベース）
あらかじめ、許容接点消耗量Waは既知のた
め、
Σwi／Wa≧１
の時、マイクロコンピユータが接点寿命に達した
と判断し、外部接点に信号を出す。 Generally, the amount of contact wear of a vacuum valve is determined by the cumulative amount of shear coulomb, and in the case of copper-based contacts, it is about 100 μg/c. Therefore, by inputting the maximum value (for example, 1 cycle) into a microcomputer from many measured values of the arc time from when the vacuum valve contact opens to when the arc is extinguished, it is possible to Contact wear amount
Wi = Ii × 10 3 × Ti × 10 -3 × 100 × 10 -6 [g] = Ii Ti × 10 -4 [g] Ti = 1 = 20ms (Ti: maximum arc time 50Hz base ) Since the allowable contact wear amount Wa is known in advance, when Σwi/Wa≧1, the microcomputer determines that the contact life has been reached and sends a signal to the external contact.
以上の流れを、第４図にブロツク線図として示
す。 The above flow is shown as a block diagram in FIG.
而して、本実施例によれば、真空開閉装置に変
流器とマイクロコンピユータを搭載することによ
り、真空バルブの接点消耗の寿命を外部接点にて
知られるだけでなく、真空バルブ接点の残余寿命
をも知ることが可能となる。また、本検出回路
は、真空開閉装置に搭載することにより、より一
層その特徴を生かすのであるが、別置としても十
分可能であり、本発明の目的を達することができ
る。 According to this embodiment, by installing a current transformer and a microcomputer in the vacuum switchgear, it is possible to not only know the life of the vacuum valve contact wear from the external contact, but also to check the remaining life of the vacuum valve contact. It is also possible to know the lifespan. Further, although the present detection circuit makes the most of its characteristics by being mounted on a vacuum switchgear, it is also possible to install it separately, and the object of the present invention can be achieved.
以上説明したように、本発明によれば、真空開
閉装置の少なくとも異なる二相の主回路に変流器
を収納し、累積しや断クーロン量を計算し、許容
しや断クーロン量と比較・判断し外部へ接点信号
を出すマイクロコンピユータを設置したために、
従来のように真空開閉装置を直接目視チエツクす
る必要がなく、外部接点信号等により、接点の寿
命を予知できるし、必要によつては、残余寿命等
も表示可能である。
As explained above, according to the present invention, a current transformer is housed in at least two different phase main circuits of a vacuum switchgear, the cumulative amount of cut-off coulombs is calculated, and compared with the allowable amount of cut-off coulombs. Because we installed a microcomputer that makes a judgment and sends a contact signal to the outside,
There is no need to directly visually check the vacuum switchgear as in the past, and the life of the contacts can be predicted using external contact signals, and if necessary, the remaining life can also be displayed.
第１図は、従来の真空開閉装置の構造図、第２
図は従来の接点消耗量の検出部、第３図は本発明
の一実施例に係る真空開閉装置の構造図、第４図
は本発明の一実施例に係るブロツク線図である。
１……主回路断路部、２……真空バルブ、３…
…操作機構、４……ワイプバネ部、５……変流
器、６……マイクロコンピユータ。
Figure 1 is a structural diagram of a conventional vacuum switchgear; Figure 2 is a structural diagram of a conventional vacuum switchgear;
3 is a structural diagram of a vacuum switchgear according to an embodiment of the present invention, and FIG. 4 is a block diagram according to an embodiment of the present invention. 1... Main circuit disconnection section, 2... Vacuum valve, 3...
...Operating mechanism, 4...Wipe spring section, 5...Current transformer, 6...Microcomputer.
Claims (1)
とを備えた真空開閉装置において、三相のうち少
なくとも二つの異なる相に変流器を取付け、前記
変流器から開閉電流値を検出し、この開閉電流値
とアーク時間から累積しや断クーロン量を演算
し、この累積しや断クーロン量と許容しや断クー
ロン量を比較判断するマイクロコンピユータとを
備えて、真空バルブの接点寿命を予知することを
特徴とする真空開閉装置。1. In a vacuum switchgear equipped with an operation mechanism for opening and closing the contacts of a vacuum valve, current transformers are installed in at least two different phases among the three phases, the switching current value is detected from the current transformer, and the switching current value is detected from the current transformer. Equipped with a microcomputer that calculates the cumulative amount of shearing coulombs from the switching current value and arcing time, and comparing and determining the accumulated amount of shedding coulombs and the allowable amount of coulombs, it predicts the life of the vacuum valve's contacts. A vacuum switchgear characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59065218A JPS60211719A (en) | 1984-04-03 | 1984-04-03 | Vacuum switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59065218A JPS60211719A (en) | 1984-04-03 | 1984-04-03 | Vacuum switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60211719A JPS60211719A (en) | 1985-10-24 |
| JPH0582008B2 true JPH0582008B2 (en) | 1993-11-17 |
Family
ID=13280548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59065218A Granted JPS60211719A (en) | 1984-04-03 | 1984-04-03 | Vacuum switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60211719A (en) |
-
1984
- 1984-04-03 JP JP59065218A patent/JPS60211719A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60211719A (en) | 1985-10-24 |
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