JPS624843U - - Google Patents
Info
- Publication number
- JPS624843U JPS624843U JP9587285U JP9587285U JPS624843U JP S624843 U JPS624843 U JP S624843U JP 9587285 U JP9587285 U JP 9587285U JP 9587285 U JP9587285 U JP 9587285U JP S624843 U JPS624843 U JP S624843U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- summing integrator
- current
- power supply
- operational amplifier
- 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
- 239000003990 capacitor Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
は実施例におけるタイムチヤート図、第３図は他
の実施例の要部を示す回路図、第４図は従来例を
示す回路図、第５図は従来例におけるタイムチヤ
ート図、第６図は他の従来例を示す回路図である
。
１…整流器、２，４…加算積分器、３，５…コ
ンパレータ、Ｒ１…電流―電圧変換部としての抵
抗、ＶＲ…可変抵抗、６…基準電源部。
Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a time chart diagram in the embodiment, Fig. 3 is a circuit diagram showing main parts of another embodiment, and Fig. 4 is a circuit showing a conventional example. 5 is a time chart of a conventional example, and FIG. 6 is a circuit diagram showing another conventional example. DESCRIPTION OF SYMBOLS 1... Rectifier, 2, 4... Addition integrator, 3, 5... Comparator, R1 ... Resistor as a current-voltage conversion section, VR... Variable resistor, 6... Reference power supply section.
Claims (1)
換部を通じて当該検出電流に対応した直流電圧を
得ると共に、演算増幅器とその入出力端間に接続
した積分用コンデンサとを含む加算積分器によつ
て前記直流電圧と基準電源部よりの電圧を加算す
るものであつて、且つこの加算積分器及びその後
段に設けられたコンパレータの組み合わせ回路が
二重化されている過電流継電器において、 前記演算増幅器の出力電圧が零付近から変化し
始めるように、前記積分用コンデンサに対して並
列にダイオードを接続し、 前記基準電源部は、基準電圧を分圧する２つの
抵抗成分の直列回路とその分圧比を調整して動作
値を整定するための分圧比調整手段を有し、 前記加算積分器の入力側及び前記コンパレータ
の基準入力側の各々に、前記基準電圧の分圧電圧
を入力するよう前記抵抗成分の互いの接続点を接
続したことを特徴とする過電流継電器。[Claim for Utility Model Registration] A DC voltage corresponding to the detected current is obtained from the detected alternating current through a rectifier and a current-to-voltage converter, and an integrating capacitor is connected between an operational amplifier and its input and output terminals. In an overcurrent relay that adds the DC voltage and the voltage from a reference power supply section using a summing integrator, and in which a combination circuit of the summing integrator and a comparator provided at a subsequent stage is duplicated. , a diode is connected in parallel to the integrating capacitor so that the output voltage of the operational amplifier starts to change from around zero, and the reference power supply section includes a series circuit of two resistance components that divides the reference voltage. It has a voltage division ratio adjusting means for adjusting the voltage division ratio to set an operating value, and inputs the divided voltage of the reference voltage to each of the input side of the summing integrator and the reference input side of the comparator. An overcurrent relay characterized in that the connection points of the resistance components are connected to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9587285U JPH0424753Y2 (en) | 1985-06-25 | 1985-06-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9587285U JPH0424753Y2 (en) | 1985-06-25 | 1985-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS624843U true JPS624843U (en) | 1987-01-13 |
| JPH0424753Y2 JPH0424753Y2 (en) | 1992-06-11 |
Family
ID=30960991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9587285U Expired JPH0424753Y2 (en) | 1985-06-25 | 1985-06-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0424753Y2 (en) |
-
1985
- 1985-06-25 JP JP9587285U patent/JPH0424753Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0424753Y2 (en) | 1992-06-11 |
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