JPH01146736U - - Google Patents
Info
- Publication number
- JPH01146736U JPH01146736U JP3576988U JP3576988U JPH01146736U JP H01146736 U JPH01146736 U JP H01146736U JP 3576988 U JP3576988 U JP 3576988U JP 3576988 U JP3576988 U JP 3576988U JP H01146736 U JPH01146736 U JP H01146736U
- Authority
- JP
- Japan
- Prior art keywords
- energized
- voltage
- contact
- detection means
- power supply
- 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
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 7
- 230000005856 abnormality Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図はその動作を示すタイミングチヤート、第３図
は従来例を示す回路図である。
１０……電圧監視回路、１１，１４……直流不
足電圧リレー、１１ｂ，１４ｂ……ｂ接点、１２
……コンデンサ、１３……抵抗、２０……保護・
制御装置、２１……電源スイツチ、２１ａ，２１
ｂ，２１ｃ，２１ｄ，２１ｅ……連動接点、２２
……ＤＣ／ＤＣコンバータ、２３……ＣＰＵ、Ｐ
０，Ｎ０…電源端子、ＬＰ０，ＬＮ０……電源線
、Ａ１，Ａ２……端子。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a timing chart showing its operation, and FIG. 3 is a circuit diagram showing a conventional example. 10... Voltage monitoring circuit, 11, 14... DC undervoltage relay, 11b, 14b... B contact, 12
... Capacitor, 13 ... Resistor, 20 ... Protection
Control device, 21...Power switch, 21a, 21
b, 21c, 21d, 21e... interlocking contacts, 22
...DC/DC converter, 23...CPU, P
0 , N0 ...Power terminal, LP0 , LN0 ...Power line, A1 , A2 ...Terminal.
Claims (1)
制御装置において、 前記直流電源電圧の低下を検出して検出接点を
動作させる電圧低下検出手段と、前記電圧低下検
出手段への非通電時に通電動作し、かつ前記電圧
低下検出手段への通電時に緩復帰する緩復帰接点
を備えた緩復帰手段と、前記検出接点及び緩復帰
接点とを直列接続してなる電圧異常信号出力手段
とを備え、前記直流電源電圧の低下時に前記検出
接点を動作させて電圧異常信号を出力させること
を特徴とする直流電源の電圧監視回路。[Scope of claim for utility model registration] Protection and
The control device includes a voltage drop detection means that detects a drop in the DC power supply voltage and operates a detection contact, and a voltage drop detection means that is energized when the voltage drop detection means is not energized, and is energized when the voltage drop detection means is energized. A slow return means having a slow return contact that returns, and a voltage abnormality signal output means formed by connecting the detection contact and the slow return contact in series, and operating the detection contact when the DC power supply voltage decreases. A DC power supply voltage monitoring circuit characterized by outputting a voltage abnormality signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3576988U JPH01146736U (en) | 1988-03-17 | 1988-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3576988U JPH01146736U (en) | 1988-03-17 | 1988-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01146736U true JPH01146736U (en) | 1989-10-11 |
Family
ID=31262406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3576988U Pending JPH01146736U (en) | 1988-03-17 | 1988-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01146736U (en) |
-
1988
- 1988-03-17 JP JP3576988U patent/JPH01146736U/ja active Pending
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