JPS621172U - - Google Patents
Info
- Publication number
- JPS621172U JPS621172U JP9157385U JP9157385U JPS621172U JP S621172 U JPS621172 U JP S621172U JP 9157385 U JP9157385 U JP 9157385U JP 9157385 U JP9157385 U JP 9157385U JP S621172 U JPS621172 U JP S621172U
- Authority
- JP
- Japan
- Prior art keywords
- abnormal
- rotation speed
- turned
- light
- relay 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.)
- Pending
Links
- 230000002159 abnormal effect Effects 0.000 claims 5
- 238000001816 cooling Methods 0.000 claims 2
- 238000012806 monitoring device Methods 0.000 claims 2
- 230000005856 abnormality Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案の一実施例回路図、第２図は従
来例の回路図、第３図は第２図の動作説明図であ
る。
〈符号の説明〉１……速度発電機、２……全波
整流器、６……主制御部、７……電流ヒユーズ、
ＺＤ１，ＺＤ２……定電圧ダイオード、ＲＹ，Ｒ
Ｙ１〜ＲＹ３……リレー、ＬＥＤ……発光ダイオ
ード、ＰｈＴ……ホトトランジスタ。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of a conventional example, and FIG. 3 is an explanatory diagram of the operation of FIG. 2. <Explanation of symbols> 1... speed generator, 2... full wave rectifier, 6... main control section, 7... current fuse,
ZD 1 , ZD 2 ... Constant voltage diode, RY, R
Y1 to RY3 ...Relay, LED...Light emitting diode, PhT...Phototransistor.
Claims (1)
下するとリレーのコイル電流をオフにし、このコ
イル電流のオフによりリレー接点が閉じて主制御
部側に警報操作信号を送出する構成の異常検出回
路を具備する空冷用フアンの複数台を備えて空冷
を行う際の回転速度異常低下監視装置において、
上記リレーのそれぞれごとに、リレー接点に直列
に接続されて接点閉により発光する発光素子と、
この光を受けて電気信号に変換する受光素子と、
この電気信号によりオンとなるスイツチングトラ
ンジスタと、このスイツチングトランジスタに直
列に接続されてトランジスタのオンにより溶断す
る電流ヒユーズとを設けて、回転速度の異常低下
を上記リレー接点を介して主制御部に告知すると
共に電流ヒユーズを溶断させて異常低下発生の痕
跡を残すことを特徴とする回転速度異常低下監視
装置。 Equipped with an abnormality detection circuit that turns off the relay coil current when the rotation speed of the fan motor drops below a certain value, and when this coil current is turned off, the relay contact closes and sends an alarm operation signal to the main control unit. In an abnormal rotation speed drop monitoring device when performing air cooling with multiple air cooling fans,
For each of the relays, a light emitting element is connected in series to the relay contact and emits light when the contact is closed;
a light-receiving element that receives this light and converts it into an electrical signal;
A switching transistor that is turned on by this electric signal and a current fuse that is connected in series with this switching transistor and melts when the transistor is turned on are provided, and abnormal decreases in rotational speed can be detected by the main control unit via the relay contact. A rotation speed abnormal drop monitoring device characterized by notifying the user of the abnormal rotation speed and blowing a current fuse to leave a trace of the occurrence of the abnormal speed drop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9157385U JPS621172U (en) | 1985-06-19 | 1985-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9157385U JPS621172U (en) | 1985-06-19 | 1985-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS621172U true JPS621172U (en) | 1987-01-07 |
Family
ID=30647583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9157385U Pending JPS621172U (en) | 1985-06-19 | 1985-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS621172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01256461A (en) * | 1988-03-15 | 1989-10-12 | Nixdorf Comput Ag | Device for arranging and storing paper piece, etc. in vessel |
-
1985
- 1985-06-19 JP JP9157385U patent/JPS621172U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01256461A (en) * | 1988-03-15 | 1989-10-12 | Nixdorf Comput Ag | Device for arranging and storing paper piece, etc. in vessel |
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