JPH01101472A - Contact life detecting device - Google Patents
Contact life detecting deviceInfo
- Publication number
- JPH01101472A JPH01101472A JP62260533A JP26053387A JPH01101472A JP H01101472 A JPH01101472 A JP H01101472A JP 62260533 A JP62260533 A JP 62260533A JP 26053387 A JP26053387 A JP 26053387A JP H01101472 A JPH01101472 A JP H01101472A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- time
- time difference
- life
- wear
- 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 32
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007423 decrease 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
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寿命を接点に通
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 life 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、遂には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の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 span of a contact in an electromagnetic contactor or the like. Figure 3 shows a state in which both the fixed and movable contacts are closed and energized; the fixed contact 2 is connected to the fixed contact block 1, and the movable contact 3 facing the fixed contact 2 is a movable contact. It is joined to the 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.
When 3 is not worn out, it protrudes to the outside from the hole in the case 6 that houses both contact blocks 1 and 4, as shown in Figure 3. However, as both contacts 2.3 wear out, the amount of protrusion of the display rod 5 gradually decreases, and finally, as shown in FIG.
Since the contact no longer protrudes from the hole, the amount of wear on the contact can be detected from this state, and the life limit of this contact can be determined.
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
ることが多く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蓋に接近しな
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 poor because it is often relied on visually, and there is also a problem in that the electromagnetic contactor must be installed at a certain location and the installation cannot be confirmed unless the contactor is close to the lid.
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.
上述の問題点を解決するため本発明は、監視されるべき
接点と、この接点に連動しかつこの接点と同時に閉成す
るよう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を検出する時間差検出部を備え、時
間差検出部により検出された時間差を予め定められた所
定値と比較し、基準接点と監視されるべき接点との閉成
時間差が所定値に達したときこの接点の一つの限界とす
る、あるいは、基準接点と監視されるべき接点との閉成
時間差の所定値を階段的に複数定める。In order to solve the above-mentioned problems, the present invention provides a contact that is to be monitored, a reference contact that is linked to this contact and is set to close at the same time as this contact, and a connection between this reference junction and the contact. The device includes a time difference detection unit that detects a difference in closing time, and compares the time difference detected by the time difference detection unit with a predetermined value, and determines when the difference in closing time between the reference contact and the contact to be monitored reaches the predetermined value. In this case, one limit of this contact is set, or a plurality of predetermined values of the closing time difference between the reference contact and the contact to be monitored are determined stepwise.
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基準接点と監視されるべき接
点との閉成速度に若干影響するが基準接点と監視される
べき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基準接点とこ
の接点とが電磁コイルに通電後同時に閉成し、閉成時間
差０に設定しておけばこの接点が消耗するにともないそ
の閉成時間がこの接点の消耗した寸法だけ遅れ両接点の
閉成時間差が次第に大きくなる。こうして予めこの閉成
時間差と監視されるべき接点の消耗量との関係を求めて
おけば、この閉成時間差から接点の消耗量がわかる。し
たがってその閉成時間差を予め定めて接点の寿命限界ま
たは寿命警戒限界を検出し、これを表示しまたは警報す
ることもできる。また閉成時間差の所定値を複数定め、
寿命警戒限界と寿命限界をそれぞれ検出することもでき
る。The wear of this contact can be ignored by simply passing a small current through the reference junction for measuring the closing time, and the difference in the amount of current flowing through the electromagnetic coils that close these contacts is the difference between the reference junction and the contact to be monitored. Although it slightly affects the closing speed of the reference junction, it does not significantly affect the closing time difference between the reference junction and the contact to be monitored. If the coils are closed simultaneously after being energized and the closing time difference is set to 0, as this contact wears out, its closing time will be delayed by the amount of wear of this contact, and the closing time difference between both contacts will gradually increase. If the relationship between this closing time difference and the amount of wear of the contacts to be monitored is determined in advance in this way, the amount of wear of the contacts can be determined from this closing time difference. Therefore, the life limit or life warning limit of the contact can be detected by predetermining the closing time difference, and this can be displayed or a warning can be issued. In addition, a plurality of predetermined values of the closing time difference are determined,
It is also possible to detect the life warning limit and the life limit, respectively.
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１２
が一体的に連結され、この接点１１と基準接点１２は電
磁コイル１３の励磁・釈放により開閉される。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１
２と、接点閉成検出部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、主接点１
１と基準接点１２は連動し基準接点１２は接点１１の使
用開始当初接点１１と同時に閉動作するように設定され
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は主接点閉成検出
部１６と基準接点閉成検出＃６１７との両出力端がそれ
ぞれ接続され、接点１１と基準接点１２との間の閉成動
作の時間差を検出する。表示ａＢ１９は時間差検出部１
Ｂの出力端が接続され両接点１１．１２の間の閉成動作
の時間差を表示する。FIG. 1 is a block diagram showing an embodiment of a contact life detection device according to the present invention, in which a contact 11 and a reference contact 12 to be monitored are shown.
The contact 11 and the reference contact 12 are opened and closed by excitation and release of the electromagnetic coil 13. Contact 11
is connected between the power supply 14 and the load 15, and supplies power to the load 15 when the power supply is closed. Contact life detection device is reference junction 1
2, a contact closure detection section 16, and a reference contact closure detection section 17.
, a time difference detection section 18 and a display section 19, and the main contact 1
1 and the reference contact 12 are linked, and the reference contact 12 is set to close at the same time as the contact 11 when the contact 11 starts to be used. 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 main contact closure detection unit 16 and the reference contact closure detection #617, and detects the time difference between the closing operations between the contact 11 and the reference contact 12. Display aB19 is time difference detection section 1
The output terminal of B is connected to indicate the time difference of the closing operation between the two contacts 11,12.
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部１６と基準接点閉成検出
部１７の両出力が時間差検出部１８に人力し、両接点１
１．１２がそれぞれ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、この出力が表示部１９に送られ
て、この時間差を表示する。この時間差が所定時間を超
えると警報を発するようにすることもできる。When the contact 11 and the reference contact 12 are respectively closed, the outputs of the contact closure detection unit 16 and the reference contact closure detection unit 17 that detect these closures are manually inputted to the time difference detection unit 18, and both contacts 1
The time difference between the times when 1.1 and 12 are closed is detected by the time difference detection section 18, and this output is sent to the display section 19 to display this time difference. It is also possible to issue an alarm when this time difference exceeds a predetermined time.
このような構成の接点寿命検出装置による接点消耗量検
出動作を監視すべき接点１１の動作をＡ。The operation of the contact 11 to be monitored for contact wear amount detection operation by the contact life detection device having such a configuration is shown in A.
基準接点１２の動作をＢ１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。接点
１１の使用開始当初、時刻ｔ０に電磁コイル１３に通電
すると時間Ｔ０後時刻１．に接点１１と基準接点１２が
ほぼ同時に閉合する。しかし接点１１が多数回閉成、開
離を繰り返し次第に消耗すると時刻ｔ。The operation of the reference junction 12 will be explained with reference to the time chart shown in FIG. 2, with the operation of the B1 electromagnetic coil 13 as C. At the beginning of the use of the contact 11, when the electromagnetic coil 13 is energized at time t0, the time 1. Contact 11 and reference contact 12 close almost simultaneously. However, when the contact 11 repeats closing and opening many times and gradually wears out, the time t is reached.
に電磁コイル１３に通電したとき、時間Ｔ０後の時刻ｔ
、には基準接点１２だけが閉動作をし、時刻ｔ、よりさ
らに時間Ｔ、遅れた時刻ｔ、に接点１１が閉動作をする
。すなわち接点１１と基準接点１２との間には時間差Ｔ
１が生ずる。そしてこの時間差Ｔｉ１ｔ接点の消耗量が
増加するに従い大きくなり、この時間差Ｔ１が所定値に
達するとそれが接点の寿命であると判定するか、警戒寿
命であると判定する。また時間差の異なる所定値を複数
段は最初の時間差は寿命警戒限界とし、これより大きい
次の時間差は寿命限界であるとすることもできる。また
、上述の時間差を表示部１９で例えば予め設定した寿命
限界の時間差から差し引くようにすれば接点１１の残量
寿命を表示することもできる。When the electromagnetic coil 13 is energized at , time t after time T0
, only the reference contact 12 closes, and the contact 11 closes at time t, and then at time t, which is delayed by a further time T. That is, there is a time difference T between the contact 11 and the reference contact 12.
1 occurs. This time difference Ti1t becomes larger as the amount of wear of the contact increases, and when this time difference T1 reaches a predetermined value, it is determined that the life of the contact has come to an end, or that it has reached the warning life. In addition, when a plurality of predetermined values with different time differences are set, the first time difference can be set as the life warning limit, and the next time difference larger than this can be set as the life limit. Further, the remaining life of the contact 11 can be displayed by subtracting the above-mentioned time difference from the time difference of a preset life limit on the display section 19, for example.
本発明によれば、監視されるべき接点と連動しかつその
接点と同時に閉成するように設定された基準接点を設け
、監視すべき接点の消耗によりその接点の閉成時点が遅
れることによってその接点と基準接点との閉成時間差が
生じ、この閉成時間差により接点の消耗量を検出するよ
うにし、この閉成時間差を電気的に求めるようにしたか
ら接点消耗の状況を低コストで正確に検出でき、接点の
寿命予告または寿命の限界値の表示、または警報をする
ことができ、さらに残量を表示することも可能である。According to the invention, a reference contact is provided which is linked to the contact to be monitored and is set to close at the same time as that contact. There is a difference in closing time between the contact and the reference contact, and the amount of wear on the contact is detected based on this difference in closing time.Since this difference in closing time is determined electrically, it is possible to accurately check the status of contact wear at a low cost. It is possible to detect the life of the contact, display the limit value of the life of the contact, or issue a warning, and it is also possible to display the remaining amount.
また遠方からの監視もでき保守２点検上の効果は大きい
。It can also be monitored from a distance, which is very effective in terms of 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消耗量検出装置の一例を示す原
理図である。
１１一監視されるべき接点、１２−基準接点、１８−・
・・時間差検出部。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 wear amount detection device. 11 - contact to be monitored, 12 - reference contact, 18 -...
...Time difference detection section.
Claims (1)
接点と同時に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を検出する時間差
検出部とを備え、前記時間差検出部により検出された時
間差を予め定められた所定値と比較して接点の寿命を検
出することを特徴とす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、基準接点と監視されるべき接点との閉成時間差が
所定値に達したときに一つの限界とすることを特徴とす
る接点寿命検出装置。 ３）特許請求の範囲第２項記載の接点寿命検出装置にお
いて、基準接点と監視されるべき接点との閉成時間差の
所定値を階段的に複数定めたことを特徴とする接点寿命
検出装置。[Claims] 1) Detection of a contact to be monitored, a reference contact that operates in conjunction with this contact and is set to close simultaneously with this contact, and a difference in closing time between this reference contact and the contact. What is claimed is: 1. A contact life detection device, comprising: a time difference detection unit, and detects the life of a contact by comparing the time difference detected by the time difference detection unit with a predetermined value. 2) In the contact life detection device according to claim 1, the contact life is set as one limit when the difference in closing time between the reference contact and the contact to be monitored reaches a predetermined value. Detection device. 3) A contact life detection device according to claim 2, characterized in that a plurality of predetermined values of the closing time difference between the reference contact and the contact to be monitored are determined stepwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62260533A JPH077037B2 (en) | 1987-10-15 | 1987-10-15 | Contact life detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62260533A JPH077037B2 (en) | 1987-10-15 | 1987-10-15 | Contact life detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101472A true JPH01101472A (en) | 1989-04-19 |
| JPH077037B2 JPH077037B2 (en) | 1995-01-30 |
Family
ID=17349288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62260533A Expired - Lifetime JPH077037B2 (en) | 1987-10-15 | 1987-10-15 | Contact life detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH077037B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011145877A (en) * | 2010-01-14 | 2011-07-28 | Omron Corp | Control system |
-
1987
- 1987-10-15 JP JP62260533A patent/JPH077037B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011145877A (en) * | 2010-01-14 | 2011-07-28 | Omron Corp | Control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH077037B2 (en) | 1995-01-30 |
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