JPS6089738U - circuit protection device - Google Patents
circuit protection deviceInfo
- Publication number
- JPS6089738U JPS6089738U JP18196283U JP18196283U JPS6089738U JP S6089738 U JPS6089738 U JP S6089738U JP 18196283 U JP18196283 U JP 18196283U JP 18196283 U JP18196283 U JP 18196283U JP S6089738 U JPS6089738 U JP S6089738U
- Authority
- JP
- Japan
- Prior art keywords
- connection point
- terminal
- resistor
- voltage
- point
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はこの考案に基づく一実施例の回路図、第２図は
同実施例の動作状態と負荷回路のインピーダンスＲ〔Ω
〕との関係を示す特性図である。
２・・・・・・リレー、４・・・・・・共通端子、６・
・・・・・常開端子、８・・・・・・常閉端子、１０・
・・・・・電源回路、１２゜１８．３２，３４，４０，
４２，８０・・・・・・抵抗器、１４・・・・・・負荷
回路、２０・・・・・・第１の接続点、３０・・・・・
・ＯＰアンプ、３５・・・・・・第２の接続点、４５・
・・・・・第３の接続点、７０・・・・・・常開スイッ
ヂ回路、１００・・・・・・基準電位点。Fig. 1 is a circuit diagram of an embodiment based on this invention, and Fig. 2 shows the operating state of the embodiment and the impedance R [Ω] of the load circuit.
] is a characteristic diagram showing the relationship between 2...Relay, 4...Common terminal, 6...
...Normally open terminal, 8...Normally closed terminal, 10.
...Power supply circuit, 12゜18.32, 34, 40,
42, 80...Resistor, 14...Load circuit, 20...First connection point, 30...
・OP amplifier, 35...Second connection point, 45・
. . . Third connection point, 70 . . . Normally open switch circuit, 100 . . . Reference potential point.
Claims (1)
端子に接続される共通端子を有し上記基準電位点に第１
の端子が接続された負荷の第２の端子に第１の抵抗器を
介して接続される第１の接点を有し第１の抵抗器よりも
値の大きい第２の抵抗器を介して上記負荷の第２の端子
と第１の抵抗−器との第１接続点に接続される第２の接
点を有する切換スイッチ回路と、第１接続点と上記基準
電位点との間に直列に接続した第３及び第４の抵抗器と
、常に電位が一定である電源端子と上記基準電位点との
間に直列に接続した第５及び第６の抵抗器と、第３の抵
抗器と第４の抵抗器との第２接続点の電圧が第５の抵抗
器と第６の抵抗器との第３接続点の電圧よりも高いとき
上記切換スイッチ回路の上記共通端子を第１の接点に接
続し第２接続点よりも第３接続点の電圧が高いとき上記
共通端子を第２の接点に接続する比較回路と、上記共通
端子が第２の接点に接続したとき閉成する常開スイッチ
素子と第７の抵抗器とを第３の接続点と上記基準電位点
との間に直列に接続した直列回路とからなり、上記負荷
の抵抗値が第１設定値以下に低下したとき第２接続点よ
り第３接続点の電圧が高くなるように第１、第３乃至第
６の抵抗器の値を設定し、上記常開スイッチング素子が
閉成した状態において上記負荷の値が第１の設定値より
も大きい第２の設定値以上になったとき第３接続点より
第２接続点の電圧が高くなるように第２及び第７の抵抗
器の値を選択したことを特徴とする回路保護装置。One terminal has a common terminal connected to the other terminal of the power supply circuit connected to the reference potential point, and the first terminal is connected to the reference potential point.
a first contact connected to a second terminal of the load to which the terminal of the load is connected via a first resistor; a changeover switch circuit having a second contact connected to a first connection point between the second terminal of the load and the first resistor, and connected in series between the first connection point and the reference potential point; the third and fourth resistors, the fifth and sixth resistors connected in series between the power supply terminal whose potential is always constant and the reference potential point, the third resistor and the fourth resistor. When the voltage at the second connection point with the resistor is higher than the voltage at the third connection point between the fifth resistor and the sixth resistor, the common terminal of the changeover switch circuit is connected to the first contact point. and a comparator circuit that connects the common terminal to a second contact when the voltage at the third connection point is higher than the voltage at the second connection point, and a normally open switch element that closes when the common terminal is connected to the second contact. and a seventh resistor connected in series between a third connection point and the reference potential point, and when the resistance value of the load falls below the first set value, the second connection is made. The values of the first, third to sixth resistors are set so that the voltage at the third connection point is higher than the voltage at the third connection point, and when the normally open switching element is closed, the value of the load is at the first setting. Circuit protection characterized in that the values of the second and seventh resistors are selected such that the voltage at the second connection point is higher than the third connection point when the voltage exceeds a second set value, which is larger than the second set value. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18196283U JPS6089738U (en) | 1983-11-24 | 1983-11-24 | circuit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18196283U JPS6089738U (en) | 1983-11-24 | 1983-11-24 | circuit protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6089738U true JPS6089738U (en) | 1985-06-19 |
| JPH0312025Y2 JPH0312025Y2 (en) | 1991-03-22 |
Family
ID=30394176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18196283U Granted JPS6089738U (en) | 1983-11-24 | 1983-11-24 | circuit protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6089738U (en) |
-
1983
- 1983-11-24 JP JP18196283U patent/JPS6089738U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0312025Y2 (en) | 1991-03-22 |
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