JPH0383434U - - Google Patents
Info
- Publication number
- JPH0383434U JPH0383434U JP14478089U JP14478089U JPH0383434U JP H0383434 U JPH0383434 U JP H0383434U JP 14478089 U JP14478089 U JP 14478089U JP 14478089 U JP14478089 U JP 14478089U JP H0383434 U JPH0383434 U JP H0383434U
- Authority
- JP
- Japan
- Prior art keywords
- digital data
- circuit
- analog input
- input circuit
- conversion circuit
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 claims 4
- 238000012544 monitoring process Methods 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図及び第２図は本考案のデジタル形保護継
電器の１実施例のブロツク図及び動作説明用の波
形図、第３図は従来例のブロツク図である。
２……アナログ入力回路、５……Ａ／Ｄ変換回
路、６Ｂ……マイコン、９ｐ，９ｎ……回路状態
検出用の抵抗、１１……警報用の補助継電器。
1 and 2 are a block diagram and a waveform diagram for explaining the operation of one embodiment of the digital protective relay of the present invention, and FIG. 3 is a block diagram of a conventional example. 2...Analog input circuit, 5...A/D conversion circuit, 6B...Microcomputer, 9p, 9n...Resistor for circuit state detection, 11...Auxiliary relay for alarm.
Claims (1)
それぞれを、アナログ入力回路によりフイルタ処
理等を施した後、Ａ／Ｄ変換回路に並列供給して
デジタルデータに変換し、前記Ａ／Ｄ変換回路に
接続されたマイクロコンピユータにより、前記各
アナログ信号のデジタルデータを高速演算して前
記電力系統等の異常を監視し、監視結果に基いて
前記電力系統等の遮断器を制御するデジタル形保
護継電器において、 前記アナログ入力回路の給電路に挿入された回
路状態検出用のインピーダンス素子と、 前記Ａ／Ｄ変換回路に設けられ前記インピーダ
ンス素子の端子間電圧をデジタルデータに変換し
て前記コンピユータに供給する端子間電圧用の変
換手段と、 前記コンピユータに設けられ前記端子間電圧の
デジタルデータに基く前記アナログ入力回路の給
電電流が正常電流範囲より増、減したときに制御
異常の警報信号を出力する制御異常監視手段と を備えたデジタル形保護継電器。[Scope of Claim for Utility Model Registration] A plurality of analog signals for detecting abnormalities in power systems, etc. are each subjected to filter processing by an analog input circuit, and then supplied in parallel to an A/D conversion circuit to be converted into digital data. A microcomputer connected to the A/D conversion circuit calculates the digital data of each of the analog signals at high speed to monitor abnormalities in the power system, etc., and operates a circuit breaker in the power system based on the monitoring results. In the digital protective relay to be controlled, an impedance element for circuit state detection inserted in the power supply path of the analog input circuit, and a voltage between the terminals of the impedance element provided in the A/D conversion circuit are converted into digital data. a converting means for a terminal voltage supplied to the computer; and a conversion means provided in the computer to detect a control abnormality when a power supply current of the analog input circuit increases or decreases from a normal current range based on digital data of the terminal voltage. A digital protective relay equipped with control abnormality monitoring means that outputs an alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14478089U JPH0383434U (en) | 1989-12-14 | 1989-12-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14478089U JPH0383434U (en) | 1989-12-14 | 1989-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0383434U true JPH0383434U (en) | 1991-08-26 |
Family
ID=31691456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14478089U Pending JPH0383434U (en) | 1989-12-14 | 1989-12-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0383434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101044831B1 (en) * | 2010-11-29 | 2011-06-27 | 임선우 | Prefabricated road block formed of composite structure |
-
1989
- 1989-12-14 JP JP14478089U patent/JPH0383434U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101044831B1 (en) * | 2010-11-29 | 2011-06-27 | 임선우 | Prefabricated road block formed of composite structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4181842A (en) | D.C. monitoring circuit | |
| US4481629A (en) | Abnormal signal detecting device | |
| JPH0392542U (en) | ||
| RU2097895C1 (en) | Device for detecting objects and warning about their approach to power transmission line | |
| JPS636469A (en) | Wire breaking detection and warning system for sensor | |
| JPH0418003Y2 (en) | ||
| JPS6114838U (en) | Power converter failure detection device | |
| JPS57206969A (en) | Fault deciding device of computer system | |
| JPS6275543U (en) | ||
| JPH0417637U (en) | ||
| JPS61208599A (en) | Branch circuit | |
| JPS6356473U (en) | ||
| JPH03122856U (en) | ||
| JPH039015U (en) | ||
| JP3197570B2 (en) | Operating time transducer for power switchgear | |
| JPH02138939U (en) | ||
| JPS6146692U (en) | fire alarm system | |
| JPH0370697U (en) | ||
| JPH0455722A (en) | Measuring apparatus | |
| JPH0242198U (en) | ||
| JPS57139815A (en) | Fault diagnostic device | |
| ES478069A1 (en) | Apparatus and Method for Detecting Electrocardiogram Baseline Shift | |
| JPH05153003A (en) | Alarm detecting system | |
| JPH04367100A (en) | Monitoring system | |
| JPS60166013U (en) | Abnormality detection circuit of stepping type control device |