JPH077037B2 - Contact life detector - Google Patents
Contact life detectorInfo
- Publication number
- JPH077037B2 JPH077037B2 JP62260533A JP26053387A JPH077037B2 JP H077037 B2 JPH077037 B2 JP H077037B2 JP 62260533 A JP62260533 A JP 62260533A JP 26053387 A JP26053387 A JP 26053387A JP H077037 B2 JPH077037 B2 JP H077037B2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- time difference
- life
- time
- monitored
- 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
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)
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。TECHNICAL FIELD The present invention relates to a contact life detecting 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、逐にはこの接点の交換を要する。A mechanical contact such as an electromagnetic contactor that opens and closes a load wears down as it is used due to an arc or the like generated between the contacts, and it is necessary to replace the contact every time.
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 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. The fixed contact 2 is joined to the fixed contact base 1, and the movable contact 3 facing the fixed contact 2 is the movable contact base 4 Is joined to. A display bar 5 is attached to the back of the movable contact base 4 for a long time in the direction in which the movable contact base 4 moves, and when both contacts 2 and 3 are not worn out, the display bar 5 will be installed as shown in FIG. Contact block 1,4
Is projected to the outside from the hole of the case 6 for storing. However, when both contacts 2 and 3 are consumed, the protruding amount of the display rod 5 gradually decreases, and finally the protruding amount of the display rod 5 does not protrude from the hole of the case 6, so the consumed amount of the contact can be detected from this state.
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
磁接触器の取り付け場所でかつ取り付け位置に接近しな
ければこれを確認できないという問題点があった。The contact life detecting device described above detects the wipe amount of the contact and mechanically displays the consumed amount. Therefore, there is a problem in that the accuracy is often high and the accuracy is low, and there is a problem in that this cannot be confirmed unless the electromagnetic contactor is attached to the attachment position and close to the attachment position.
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。It is an object of the present invention to provide a contact life detecting device that can easily monitor the amount of wear of a contact from a distance while energizing the contact without relying on artificial judgment.
上述の問題点を解決するため本発明は、電源と負荷との
間に挿入されて負荷を開閉するとともに、閉成状態から
開成状態への移行時に発生するアークにより消耗する監
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段階的に複数定める。In order to solve the above-mentioned problems, the present invention inserts between a power source and a load to open and close the load, and a contact to be monitored that is consumed by an arc generated at the time of transition from the closed state to the open state. , A reference contact set to interlock with this contact and set to close at the same time as this contact, and a time difference detection unit for detecting a closing time difference between the reference contact and the contact, and a time difference detected by the time difference detection unit. Is compared with a predetermined value, and when the closing time difference between the reference contact and the contact to be monitored reaches a predetermined value, it is set as one limit of this contact, or the reference contact and the contact to be monitored. And a plurality of predetermined values of the closing time difference between and.
前述したような本発明においては、電源と負荷との間に
挿入されて負荷を開閉するとともに、閉成状態から開成
状態への移行時に発生するアークにより消耗する監視さ
れるべき接点に対して、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。In the present invention as described above, while inserting and closing the load by being inserted between the power supply and the load, with respect to the contact to be monitored, which is consumed by the arc generated during the transition from the closed state to the open state, Wear of this contact can be ignored by simply passing a small current for measuring the closing time to the reference contact, and the difference in the energization amount of the electromagnetic coil that closes these contacts is different from the reference contact and the contact to be monitored. Paying attention to the fact that it slightly affects the closing speed of the contact, but does not affect the closing time difference between the reference contact and the contact to be monitored so much that the reference contact and this contact are electromagnetic at the beginning of use of the contact to be monitored. If the contacts are closed at the same time after energization and the closing time difference is set to 0, the closing time is delayed by the worn size of this contact as the contact wears, and the closing time difference between both contacts gradually increases. Thus, if the relationship between the closing time difference and the contact wear amount to be monitored is obtained in advance, the contact wear amount can be known from the closing time difference. Therefore, the closing time difference is determined in advance to detect the life limit or life warning limit of the contact,
This can be displayed or alarmed. It is also possible to determine a plurality of predetermined closing time difference values and 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12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11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部17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。表示部19は時間差検出部18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 detecting apparatus according to the present invention, in which a contact 11 and a reference contact 12 to be monitored are integrally connected, and the contact 11 and the reference contact 12 are electromagnetic coils.
It is opened and closed by 13 excitations and releases. The contact 11 is connected between the power supply 14 and the load 15, and supplies power to the load 15 by closing the contact 11. The contact life detector is the reference contact 12 and the contact closure detector.
16, a reference contact closure detection unit 17, a time difference detection unit 18, and a display unit 19, and the main contact 11 and the reference contact 12 are linked to each other.
The contact 12 is set to close at the same time when the contact 11 is initially used. The contact closure detector 16 is connected to the contact 11 and the load.
It is connected to 15 and detects the closing operation of the contact 11. The reference contact closure detector 17 is connected so as to detect the closing operation of the reference contact 12. The time difference detector 18 is the main contact closure detector
Both output terminals of 16 and the reference contact closure detection unit 17 are connected to each other, and the time difference of the closing operation between the contact 11 and the reference contact 12 is detected. The display unit 19 is connected to the output end of the time difference detection unit 18 and displays the time difference of the closing operation between the contacts 11 and 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に入力し、両接点11,12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 closed respectively, both outputs of the contact closure detection unit 16 and the reference contact closure detection unit 17 which detect the closure are input to the time difference detection unit 18, and both contacts 11 and 12 are The time difference at the time of closing each is detected by the time difference detection unit 18, and this output is sent to the display unit 19 to display this time difference. An alarm may be issued 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、基準接点12の動
作をＢ、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t1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t2
に電磁コイル13に通電したとき、時間T0後の時刻t3には
基準接点12だけが閉動作をし、時刻t3よりさらに時間T1
遅れた時刻t4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T1が生ずる。そしてこの
時間差T1は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設け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。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。The operation of the contact 11 that should monitor the contact wear amount detection operation by the contact life detecting device having such a configuration is A, the operation of the reference contact 12 is B, and the operation of the electromagnetic coil 13 is C, according to the time chart shown in FIG. explain. At the beginning of using contact 11,
When the electromagnetic coil 13 is energized at time t 0 , the contact 11 and the reference contact 12 are closed almost at the same time at time t 1 after time T 0 . But contact 11
Is closed and opened a number of times and wears out gradually, time t 2
When energized electromagnetic coil 13, only the reference junction 12 and the closing operation at time t 3 after time T 0, additional time T 1 from time t 3
The contact 11 closes at the delayed time t 4 . Ie contact point 11
A time difference T 1 occurs between the reference contact 12 and the reference contact 12. And this time difference T 1 increases as the contact wear increases,
When this time difference T 1 reaches a predetermined value, it is determined that it is the life of the contact, or it is determined that it is the warning life. It is also possible to provide a plurality of predetermined values with different time differences and set the first time difference as the life warning limit and the next time difference larger than this as the life limit. The remaining life of the contact 11 can also be displayed by subtracting the above-mentioned time difference from the time difference of the life limit set in advance on the display unit 19.
以上に説明したように本発明によれば、電源と負荷との
間に挿入されて負荷を開閉するとともに、閉成状態から
開成状態への移行時に発生するアークにより消耗する監
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。また遠方からの監視
もでき保守，点検上の効果は大きい。As described above, according to the present invention, the contacts to be monitored that are inserted between the power supply and the load to open and close the load, and that are consumed by the arc generated at the time of transition from the closed state to the open state, A reference contact set so as to be interlocked and to be closed at the same time as the contact is provided, and the closing time of the contact is delayed due to consumption of the contact to be monitored, resulting in a difference in closing time between the contact and the reference contact. The amount of contact wear is detected based on this difference in closing time, and the difference in closing time is electrically obtained, so the condition of contact wear can be accurately detected at low cost. Can be displayed or an alarm can be given, and the remaining amount can also be displayed. In addition, it can be monitored from a distance, and its effect on maintenance and inspection is great.
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……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 detecting device according to the present invention, FIG. 1 is a block diagram, FIG. 2 is a time chart showing the operation of the contact of FIG. 1, FIG. 3 and FIG. Four
Each of the drawings is a principle diagram showing an example of a conventional contact wear amount detecting device. 11 ... contacts to be monitored, 12 ... reference contacts, 18 ... time difference detector.
Claims (3)
するとともに、閉成状態から開成状態への移行時に発生
するアークにより消耗する監視されるべき接点と、この
接点と連動しかつこの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。1. A contact to be monitored, which is inserted between a power source and a load to open and close the load, and which is consumed by an arc generated at the time of transition from the closed state to the open state, and which is interlocked with this contact. A reference contact set to close at the same time as this contact and a time difference detection unit that detects a closing time difference between the reference contact and the contact are provided, and the time difference detected by the time difference detection unit is predetermined. A contact life detecting device characterized by detecting the life of a contact by comparing it with a predetermined value.
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。2. The contact life detecting device according to claim 1, wherein one limit is set when the closing time difference between the reference contact and the contact to be monitored reaches a predetermined value. Contact life detector.
装置に於いて、基準接点と監視されるべき接点との閉成
時間差の所定値を段階的に複数定めたことを特徴とする
接点寿命検出装置。3. The contact life detecting device according to claim 2, wherein a plurality of predetermined closing time differences between the reference contact and the contact to be monitored are set stepwise. Contact life detector.
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 JPH01101472A (en) | 1989-04-19 |
| JPH077037B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5407882B2 (en) * | 2010-01-14 | 2014-02-05 | オムロン株式会社 | Control system |
-
1987
- 1987-10-15 JP JP62260533A patent/JPH077037B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01101472A (en) | 1989-04-19 |
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