JPH01101471A - Contact life detecting device - Google Patents
Contact life detecting deviceInfo
- Publication number
- JPH01101471A JPH01101471A JP62260532A JP26053287A JPH01101471A JP H01101471 A JPH01101471 A JP H01101471A JP 62260532 A JP62260532 A JP 62260532A JP 26053287 A JP26053287 A JP 26053287A JP H01101471 A JPH01101471 A JP H01101471A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- time
- life
- difference
- limit
- 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
- 238000001514 detection method Methods 0.000 claims description 25
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電磁接触器などにおける接点の消耗状況を接点
に通電中に検出する接点寿命検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a contact life detection device for detecting the state of wear of a contact in an electromagnetic contactor or the like while the contact is energized.
電磁接触器のような負荷を開閉する機械的な接点は、こ
の接点間に発生するアークなどにより使用するに従って
消耗し、遂にほこの接点の交換を要する。Mechanical contacts such as electromagnetic contactors that open and close loads wear out as they are used due to arcs generated between the contacts, and eventually require replacement.
電磁接触器などにおける接点寿命を検出する装置として
第３図に示すものが知られている。第３図は固定、可動
両接点が閉成し、通電している状態を示し、固定接点台
１には固定接点２が接合され、この固定接点２に対向°
する可動接点３は可動接点台４に接合されている。可動
接点台４の背部には表示棒５が可動接点台４の移動する
方向に長く取り付けられ、この表示棒５は両接点２．３
が消耗していないときは第３図に示すように両接点台１
． ４を収納するケース６の穴から外部に突出している
。しかし両接点２．３が消耗すると表示棒５の突出量は
次第に減少し、遂には第４図に示すようにケース６の穴
から突出しなくなるからこの状態から接点の消耗量が検
出でき、この接点の寿命限界などを決定することができ
る。A device shown in FIG. 3 is known as a device for detecting the life of a contact in an electromagnetic contactor or the like. Fig. 3 shows a state in which both the fixed and movable contacts are closed and energized; a fixed contact 2 is connected to the fixed contact block 1, and the fixed contact 2 is facing
The movable contact 3 is connected to a movable contact base 4. A display rod 5 is attached to the back of the movable contact base 4 and is long in the direction in which the movable contact base 4 moves.
is not worn out, as shown in Figure 3, both contact blocks 1
．． 4 protrudes outside from a hole in a case 6 that houses the case 6. However, as both contacts 2.3 wear out, the amount of protrusion of the indicator rod 5 gradually decreases until it no longer protrudes from the hole in the case 6 as shown in FIG. It is possible to determine the life limit of the
上述の接点寿命検出装置は接点のワイプ量を検出し、そ
の消耗量を機械的に表示している。したがって視覚に頼
ることが多（精度が悪いという問題点があり、さらに電
磁接触器の取り付は場所でかつ取り付は位置に接近しな
ければこれを確認できないという問題点があった。The above-described contact life detection device detects the amount of contact wiped and mechanically displays the amount of wear. Therefore, there is a problem in that the accuracy is low, and that the electromagnetic contactor must be installed at a certain location, and the installation cannot be confirmed unless one is close to the location.
本発明の目的は接点の消耗量を接点に通電中に、人為的
判断に頼らず、遠方からも容易に監視できる接点寿命検
出装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a contact life detection device that can easily monitor the wear amount of a contact from a distance while the contact is energized without relying on human judgment.
本発明は上述の問題点を解決するため、監視されるべき
接点と、この接点に連動しかっこの接点より所定時間遅
れて閉成するように設定された基たちので、設定消耗量
をこの接点の寿命限界とすることも、寿命警戒限界とす
ることもできる。またそれぞれ閉成時間の異なる複数の
基準接点を設けることもできる。In order to solve the above-mentioned problems, the present invention includes a contact to be monitored and a base that is set to close a predetermined time later than the parenthesis contact linked to this contact. It can be a lifespan limit or a lifespan warning limit. It is also possible to provide a plurality of reference contacts each having a different closing time.
基準接点には閉成時間測定用の小電流を通電するだけで
、この接点の消耗は無視でき、これらの接点を閉成する
電磁コイルの通電量の相異が接点の動作速度に若干影響
するが監視されるべき接点と基準接点との閉成時間差に
は余り影響しないことに着目し、監視されるべき接点の
使用開始当初に電磁コイルに通電したときこの接点が閉
成した後、予め理論的または実験的に求めた所定時間だ
け遅れて基準接点が閉成するように設定しておけば接点
が消耗した寸法だけ閉成時間が次第に長くなり、結果的
には両接点の閉成時間差が次第に縮小し、さらに反転す
る点を利用し、両接点が同時に閉成したときすなわち時
間差０のときをこの接点の寿命限界とするかまたは寿命
警戒限界とする。By simply passing a small current through the reference contact for measuring the closing time, the wear and tear on this contact can be ignored, and differences in the amount of current applied to the electromagnetic coils that close these contacts will slightly affect the operating speed of the contacts. Focusing on the fact that this does not have much effect on the difference in closing time between the contact to be monitored and the reference contact, we theoretically If the reference contact is set to close after a delay of a predetermined time determined experimentally or experimentally, the closing time will gradually increase by the amount of wear on the contact, and as a result, the difference in closing time between the two contacts will increase. By utilizing the point where the contact gradually shrinks and then reverses, the time when both contacts close simultaneously, that is, when the time difference is 0, is set as the life limit of this contact or the life warning limit.
さらに例えば開成時間の異なるＳ、、 Ｓ！両基準接点
を設け、接点とＳｌ基準接点とが同時に閉成したとき寿
命警戒限界とし、これより遅れて接点と８２基準接点と
が同時に閉成したとき寿命限界とする。Furthermore, for example, S,, S! with different opening times. Both reference contacts are provided, and when the contact and the Sl reference contact close at the same time, the life warning limit is determined, and when the contact and the 82 reference contact close simultaneously later than this, the life limit is determined.
第１図は本発明による接点寿命検出装置の一実施例を示
すブロック図で、監視されるべき接点１１と基準接点１
２は一体的に連結され、電磁コイル１３の励磁・釈放に
連動して開閉される。接点１１は電源１４と負荷１５と
の間に接続されその閉成により負荷１５に給電する。接
点寿命検出装置は基準接点１２と、接点開成検出［１６
と、基準接点閉成検出部１７と、時間差検出部１８と、
表示部１９とを備え、接点１１と基準接点１２は連動し
基準接点１２の閉動作は接点１１が使用開始当初接点１
１より所定時間遅れるように設定されている。接点閉成
検出部１６は接点１１と負荷１５との間に接続され、接
点１１の閉動作を検出する。基準接点閉成検出部１７は
基準接点１２の閉動作を検出するように接続されている
。時間差検出部１８は接点閉成検出部１６と基準接点閉
成検出部１７の両出力端がそれぞれ接続され、接点１１
と基準接点１２との間の閉成時間差を検出し、この時間
差を表示部１９で表示する。FIG. 1 is a block diagram showing an embodiment of the contact life detection device according to the present invention, in which a contact 11 to be monitored and a reference contact 1 are shown.
2 are integrally connected and are opened and closed in conjunction with the excitation and release of the electromagnetic coil 13. The contact 11 is connected between the power source 14 and the load 15, and supplies power to the load 15 when the contact 11 is closed. The contact life detection device includes a reference contact 12 and a contact open detection [16
, a reference junction closure detection section 17 , a time difference detection section 18 ,
The contact 11 and the reference contact 12 are interlocked, and the closing operation of the reference contact 12 is such that the contact 11 is the contact 1 at the beginning of use.
1 to be delayed by a predetermined period of time. The contact closure detection section 16 is connected between the contact 11 and the load 15 and detects the closing operation of the contact 11. The reference junction closure detection section 17 is connected to detect the closing operation of the reference junction 12. The time difference detection unit 18 is connected to both output ends of the contact closure detection unit 16 and the reference contact closure detection unit 17, and the contact 11
The closing time difference between the reference junction 12 and the reference junction 12 is detected, and this time difference is displayed on the display unit 19.
接点１１と基準接点１２がそれぞれ閉成すると、これら
の閉成を検出した接点閉成検出ａＢ１６と基準接点開成
検出部１７の百出力が時間差検出部１８に人力し、両接
点１１．１２の閉成したときの時間差がこの時間差検出
部１８で検出され、その出力が表示部１９に送られ、こ
の時間差を表示する。そしてこの時間差は接点１１が閉
成、開離を繰り返す間に次第に縮小し、遂にＯになり、
さらに反転する。このときを接点Ｉｆの寿命限界とする
ことも寿命警戒限界とすることもできる。またこれらの
限界を警報するように構成してもよい。When the contact 11 and the reference contact 12 are respectively closed, the 100 outputs from the contact closure detection aB 16 and the reference contact open detection unit 17 that detect these closures are manually inputted to the time difference detection unit 18, and both contacts 11 and 12 are closed. The time difference when this happens is detected by the time difference detection section 18, and its output is sent to the display section 19 to display this time difference. This time difference gradually decreases as the contact 11 repeats closing and opening, and finally reaches O.
Invert further. This time can be set as the lifespan limit of the contact If, or it can be set as the lifespan warning limit. It may also be configured to warn of these limits.
このような構成の接点寿命検出装置による接点１１の消
耗量検出状態を接点１１の動作をＡ１基準接点１２の動
作をＢ２電磁コイル１３の動作をＣとして第２図に示す
タイムチャートにより説明する。The wear amount detection state of the contact 11 by the contact life detection device having such a configuration will be explained with reference to the time chart shown in FIG. 2, with the operation of the contact 11, the operation of the A1 reference contact 12, and the operation of the B2 electromagnetic coil 13 as C.
まず電磁コイル１３に通電したとき、接点１１の使用開
始当初の接点１１の閉動作の遅れと、この接点が多数回
閉成、開離を繰り返し所定消耗量に達したときの閉動作
の遅れとの時間差Ｔ１を理論的または実験的に求めてこ
の時間差Ｔ、を設定する。すなわち接点１１の使用開始
当初の時刻ｔ。に電磁コイル１３に通電すると時間Ｔ０
後の時刻ｔ、に基準接点１２が閉成する。しかしこれ以
前の時刻ｔ１に既に接点１１が閉成している。そしてこ
の時刻ｔ１と時刻ｔ２との時間差は設定時間差Ｔ、であ
る。次に、この接点１１が多数回開成、開離を繰り返し
所定消耗量に達すると、時刻ｔ、に電磁コイル１３に通
電したとき、これより時間Ｔ。後の時刻ｔ４に接点１１
と基準接点１２が同時に閉成する。すなわち接点１１と
基準接点１２との閉成時間差は０になり、接点１１がさ
らに消耗すると閉成時間差は逆転する。この時間差が０
のときを接点１１の寿命限界とするか、寿命警戒限界と
する。First, when the electromagnetic coil 13 is energized, there is a delay in the closing operation of the contact 11 when the contact 11 first starts to be used, and a delay in the closing operation when the contact repeats closing and opening many times and reaches a predetermined amount of wear. This time difference T is determined by theoretically or experimentally determining the time difference T1. That is, the time t at the beginning of the use of the contact 11. When the electromagnetic coil 13 is energized at the time T0
The reference junction 12 closes at a later time t. However, the contact 11 has already been closed at time t1 before this. The time difference between this time t1 and time t2 is a set time difference T. Next, when this contact 11 repeats opening and opening many times and reaches a predetermined amount of wear, time T starts when the electromagnetic coil 13 is energized at time t. Contact 11 at later time t4
and the reference junction 12 are closed at the same time. That is, the difference in closing time between the contact 11 and the reference contact 12 becomes 0, and as the contact 11 wears out further, the difference in closing time is reversed. This time difference is 0
This is the life limit of the contact 11 or the life warning limit.
なお電磁コイル１３に通電してから閉動作するまでの時
間が時間Ｔ０より短い基準接点１２ａと、この時間が時
間Ｔ。より長い基準接点１２ｂとを設け、接点１１と基
準接点１２Ｈの開成時間差が０に達したときを寿命警戒
限界とし、接点１１の消耗がさらに進行し、接点１１と
基準接点１２ｂとの開成時間差が０に達したときを寿命
限界とすることもできる。また基準接点１２は常開接点
でも常閉接点でもよく、さらに接点と機械的に連動する
無接点スイッチであってもよい。また表示部は表示だけ
でなく、設定値に達したとき警報を発するようにしても
よい。Note that in the reference contact 12a, the time from when the electromagnetic coil 13 is energized until it closes is shorter than the time T0, and this time is the time T. A longer reference junction 12b is provided, and the time when the difference in opening time between the contact 11 and the reference junction 12H reaches 0 is set as the life warning limit, and as the wear of the contact 11 progresses further, the difference in opening time between the contact 11 and the reference junction 12b increases. It is also possible to set the time when the value reaches 0 as the life limit. Further, the reference contact 12 may be a normally open contact or a normally closed contact, or may be a non-contact switch mechanically interlocked with the contact. Further, the display unit may not only display information, but also issue an alarm when a set value is reached.
本発明によれば、監視されるべき接点と連動する基準接
点を設け、この基準接点の閉動作が監視されるべき接点
の閉動作よりも所定時間遅くなるように設定し、この両
接点が同時に閉動作したときに接点の寿命限界または寿
命警戒限界であるように設定し、この閉成時間差を電気
的に検出するようにしたから接点消耗の状況を低コスト
で正確に検出でき、この接点の残寿命は勿論、接点の寿
命予告（寿命警戒限界〉、または寿命限界に来たことの
表示または警報することができる。また基準接点を複数
段ければ寿命予告と寿命限界など２以上の接点消耗量を
表示または警報することも可能である。さらに遠方から
の監視もでき保守点検上の効果は大きい。According to the present invention, a reference junction is provided that interlocks with the contact to be monitored, and the closing operation of the reference junction is set to be slower than the closing operation of the contact to be monitored by a predetermined time, and both the contacts are simultaneously operated. By setting the contact to reach its life limit or life warning limit when it closes, and by electrically detecting the difference in closing time, it is possible to accurately detect contact wear and tear at low cost. In addition to the remaining life, it is possible to display or warn of contact life warning (life warning limit) or that the life limit has been reached.In addition, if there are multiple reference junctions, it can be used to notify the wear-out of two or more contacts such as life warning and life limit. It is also possible to display or warn the amount.Furthermore, it can be monitored from a distance, which has a great effect on maintenance and inspection.
第１図および第２図は本発明による接点寿命検出装置の
一実施例を示し、第１図はブロック図、第２図は第１図
の接点の動作を示すタイムチャート、第３図および第４
図はそれぞれ従来の接点寿命検出装置の一例を示す原理
図である。
１１ 監視されるべき接点、１２−基準接点。
］
Ｚ １ 図
ｒ ２ 図
第 ３ 図 石 ４ 閉1 and 2 show an embodiment of the contact life detection device according to the present invention, in which FIG. 1 is a block diagram, FIG. 2 is a time chart showing the operation of the contact in FIG. 1, and FIGS. 4
Each figure is a principle diagram showing an example of a conventional contact life detection device. 11 - contact to be monitored, 12 - reference contact. ] Z 1 Figure r 2 Figure 3 Stone 4 Closed
Claims (1)
の接点より所定時間遅れて閉成するように設定された基
準接点と、この基準接点と前記接点との閉成時間差によ
り前記接点の寿命を検出する検出手段とを具備してなる
接点寿命検出装置。 ２）特許請求の範囲第１項記載の接点寿命検出装置にお
いて、設定消耗量を接点の寿命限界としたことを特徴と
する接点寿命検出装置。 ３）特許請求の範囲第１項記載の接点寿命検出装置にお
いて、設定消耗量を接点の寿命警戒限界としたことを特
徴とする接点消耗量検出装置。 ４）特許請求の範囲第１項記載の接点寿命検出装置にお
いて、それぞれ閉成時間の異なる複数の基準接点を設け
たことを特徴とする接点寿命検出装置。[Claims] 1) A contact to be monitored, a reference contact that is linked to this contact and is set to close a predetermined time later than this contact, and a connection between this reference contact and the contact. A contact life detection device comprising: detection means for detecting the life of the contact based on the difference in formation time. 2) A contact life detection device according to claim 1, characterized in that a set amount of wear is used as a life limit of the contact. 3) A contact life detecting device according to claim 1, wherein the set wear amount is a contact life warning limit. 4) A contact life detection device according to claim 1, characterized in that a plurality of reference contacts having different closing times are provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62260532A JPH077036B2 (en) | 1987-10-15 | 1987-10-15 | Contact life detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62260532A JPH077036B2 (en) | 1987-10-15 | 1987-10-15 | Contact life detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101471A true JPH01101471A (en) | 1989-04-19 |
| JPH077036B2 JPH077036B2 (en) | 1995-01-30 |
Family
ID=17349274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62260532A Expired - Lifetime JPH077036B2 (en) | 1987-10-15 | 1987-10-15 | Contact life detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH077036B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2619722A (en) * | 2022-06-13 | 2023-12-20 | L C Switchgear Ltd | Switch condition monitoring |
-
1987
- 1987-10-15 JP JP62260532A patent/JPH077036B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2619722A (en) * | 2022-06-13 | 2023-12-20 | L C Switchgear Ltd | Switch condition monitoring |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH077036B2 (en) | 1995-01-30 |
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