JPS61137279U - - Google Patents
Info
- Publication number
- JPS61137279U JPS61137279U JP2056185U JP2056185U JPS61137279U JP S61137279 U JPS61137279 U JP S61137279U JP 2056185 U JP2056185 U JP 2056185U JP 2056185 U JP2056185 U JP 2056185U JP S61137279 U JPS61137279 U JP S61137279U
- Authority
- JP
- Japan
- Prior art keywords
- monitoring device
- leakage current
- automatic leakage
- signal
- zener diode
- 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
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案による漏れ電流自動監視装置の
一実施例を示す回路図であり、第２図は従来の漏
れ電流の測定法の一例を示す回路図である。
１……避雷器、７……変流器、９……増幅部、
１０……測定部、１１……伝送部、１３……サー
ジ保護回路、１４……低電圧バリスタ、１５……
抵抗、１６……ツエナーダイオード、１７……変
電所アース、１８……信号線、１９……接地点。
FIG. 1 is a circuit diagram showing an embodiment of an automatic leakage current monitoring device according to the present invention, and FIG. 2 is a circuit diagram showing an example of a conventional leakage current measurement method. 1... Lightning arrester, 7... Current transformer, 9... Amplifying section,
10... Measuring section, 11... Transmission section, 13... Surge protection circuit, 14... Low voltage varistor, 15...
Resistor, 16... Zener diode, 17... Substation ground, 18... Signal line, 19... Ground point.
Claims (1)
器と、検出した信号を増幅する増幅部、増幅した
信号を測定する測定部、測定した信号を伝送する
伝送部を順次配設し、これらの間に配設した信号
線の一端を接地するものにおいて、 前記変流器の２次側に、低電圧バリスタと、抵
抗・ツエナーダイオードの直列接続体とを並列に
接続して成るサージ保護回路を接続し、前記増幅
部の入力端子をツエナーダイオードの両端に接続
したことを特徴とする漏れ電流自動監視装置。 (2) 伝送部が、その出力側に、低電圧バリスタ
と、抵抗・ツエナーダイオードを直列接続したも
のとを並列に接続して成るサージ保護回路を接続
したものである実用新案登録請求の範囲第１項記
載の漏れ電流自動監視装置。 (3) 変流器が、その１次側電流と２次側電流の
直接関係を成立させる最小１次側電流値を、５０
〜６０Ｈｚにおいて５０ｍＡｐ以下に設定したも
のである実用新案登録請求の範囲第１項記載の漏
れ電流自動監視装置。 (4) 信号線の一端の接地が、変流器の２次側に
接続されたサージ保護回路においてのみ行なわれ
ている実用新案登録請求の範囲第１項記載の漏れ
電流自動監視装置。 (5) 伝送部が、ケーブルを介して直流電流等の
信号を伝送するものである実用新案登録請求の範
囲第１項記載の漏れ電流自動監視装置。 (6) 伝送部が、光フアイバケーブルを介して光
信号を伝送するものである実用新案登録請求の範
囲第１項記載の漏れ電流自動監視装置。[Scope of claim for utility model registration] (1) A current transformer that detects leakage current flowing in electrical equipment, an amplification section that amplifies the detected signal, a measurement section that measures the amplified signal, and a transmission that transmits the measured signal. A low voltage varistor and a series connection body of a resistor and a Zener diode are connected in parallel on the secondary side of the current transformer. An automatic leakage current monitoring device characterized in that a surge protection circuit is connected to the zener diode, and input terminals of the amplification section are connected to both ends of a zener diode. (2) The transmission section has a surge protection circuit connected to its output side in parallel with a low voltage varistor and a series connection of a resistor and a Zener diode. The automatic leakage current monitoring device according to item 1. (3) The minimum primary current value at which a current transformer establishes a direct relationship between its primary current and secondary current is 50
The automatic leakage current monitoring device according to claim 1, which is set to 50 mAp or less at a frequency of ~60 Hz. (4) The automatic leakage current monitoring device according to claim 1, wherein one end of the signal line is grounded only in the surge protection circuit connected to the secondary side of the current transformer. (5) The automatic leakage current monitoring device according to claim 1, wherein the transmission section transmits a signal such as a direct current via a cable. (6) The automatic leakage current monitoring device according to claim 1, wherein the transmission section transmits an optical signal via an optical fiber cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020561U JPH06778Y2 (en) | 1985-02-18 | 1985-02-18 | Leakage current automatic monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020561U JPH06778Y2 (en) | 1985-02-18 | 1985-02-18 | Leakage current automatic monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61137279U true JPS61137279U (en) | 1986-08-26 |
| JPH06778Y2 JPH06778Y2 (en) | 1994-01-05 |
Family
ID=30511165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985020561U Expired - Lifetime JPH06778Y2 (en) | 1985-02-18 | 1985-02-18 | Leakage current automatic monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06778Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE319378T1 (en) * | 2001-12-03 | 2006-03-15 | Ekos Corp | CATHETER WITH MULTIPLE ULTRASONIC EMITTING PARTS |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53116016A (en) * | 1977-03-18 | 1978-10-11 | Nippon Telegr & Teleph Corp <Ntt> | Surge protection system for communication path |
| JPS5928373U (en) * | 1982-08-12 | 1984-02-22 | 関 潔 | cutlery |
-
1985
- 1985-02-18 JP JP1985020561U patent/JPH06778Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53116016A (en) * | 1977-03-18 | 1978-10-11 | Nippon Telegr & Teleph Corp <Ntt> | Surge protection system for communication path |
| JPS5928373U (en) * | 1982-08-12 | 1984-02-22 | 関 潔 | cutlery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06778Y2 (en) | 1994-01-05 |
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