JP2803116B2 - Ground circuit - Google Patents
Ground circuitInfo
- Publication number
- JP2803116B2 JP2803116B2 JP63316467A JP31646788A JP2803116B2 JP 2803116 B2 JP2803116 B2 JP 2803116B2 JP 63316467 A JP63316467 A JP 63316467A JP 31646788 A JP31646788 A JP 31646788A JP 2803116 B2 JP2803116 B2 JP 2803116B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- constant voltage
- circuit
- diode
- voltage
- 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.)
- Expired - Lifetime
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Control Of Voltage And Current In General (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は海底ケーブル伝送方式における接地回路に関
し、特に、大電流の定電流給電システムの場合の接地回
路に関する。Description: BACKGROUND OF THE INVENTION The present invention relates to a grounding circuit in a submarine cable transmission system, and particularly to a grounding circuit for a large-current constant-current power supply system.
［従来の技術］ 第３図に従来の接地回路の一例を示す。この接地回路
は、給電アース（Sea Earth）S.Eの異常により、ある電
圧以上に接地電圧VGが上昇した場合、定電圧ダイオード
D1〜D2″を介して給電電流を局舎アース（Station Eart
h）ST.Eにバイパスさせるものである。[Prior Art] FIG. 3 shows an example of a conventional ground circuit. The grounding circuit, when the abnormality of the power supply ground (Sea Earth) SE, the ground voltage V G exceeds a certain voltage rises, the constant voltage diode
Power supply current via D1 ~ D2 "
h) Bypass to ST.E.
［発明が解決しようとする課題］ しかしながら、従来の接地回路の場合、接地抵抗の異
常値に対して給電電流I0が大きいとバイパス電流I2も大
きくなり、定電圧ダイオードによる熱損失が増大すると
いう欠点がある。[Problems to be Solved] However, the conventional ground circuit, a bypass current I 2 also increases and a large power supply current I 0 to the extraordinary value of the ground resistance, heat loss increases due to the constant voltage diode There is a disadvantage that.
本発明の課題は、上記欠点を除去し、定電圧ダイオー
ドにより熱損失を小さくできる接地回路を提供すること
にある。An object of the present invention is to provide a grounding circuit which eliminates the above-mentioned disadvantages and can reduce heat loss by using a constant voltage diode.
［課題を解決するための手段］ 本発明によれば、 第１および第２の定電圧ダイオードを、互いに同じ極
性が向き合った状態で直列に接続した定電圧ダイオード
直列回路と； 第１および第２の交流入力端子と正および負の出力端
子とを有し、前記第１の交流入力端子を前記定電圧ダイ
オード直列回路の一端に接続されたダイオードブリッジ
と； 該ダイオードブリッジの前記正および負の出力端子
に、アノードおよびカソードを、それぞれ接続されたサ
イリスタと； 前記正および負の出力端子にそれぞれの一端を接続さ
れ、それぞれの他端を前記サイリスタのゲートに共通に
接続された第１および第２の抵抗と；を含み、 前記定電圧ダイオード直列回路の他端が、給電アース
および局舎アースのうちの一方に接続され、前記ダイオ
ードブリッジの前記第２の交流入力端子が、前記給電ア
ースおよび前記局舎アースのうちの他方に接続されてい
ることを特徴とする接地回路が得られる。[Means for Solving the Problems] According to the present invention, a first and second constant voltage diode series circuit in which the first and second constant voltage diodes are connected in series with the same polarity facing each other; A diode bridge having an AC input terminal and positive and negative output terminals, the first AC input terminal being connected to one end of the constant voltage diode series circuit; and the positive and negative outputs of the diode bridge. A thyristor having an anode and a cathode respectively connected to a terminal; first and second thyristors each having one end connected to the positive and negative output terminals and having the other end commonly connected to a gate of the thyristor; The other end of the constant voltage diode series circuit is connected to one of a power supply ground and a local ground, and the diode bridge The second AC input terminal of the ground circuit, characterized in that connected to the other of the power supply ground and the center office ground is obtained.
［実施例］ 次に本発明の実施例について図面を参照して説明す
る。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図を参照すると、本発明の一実施例による接地回
路は、第１および第２の定電圧ダイオードD1およびD2
を、互いに同じ極性が向き合った状態で直列に接続した
定電圧ダイオード直列回路10と、ダイオードD3,D4,D5、
およびD6からなるダイオードブリッジ20とを有してい
る。ダイオードブリッジ20は、第１および第２の交流入
力端子21および22と、正および負の出力端子23および24
とを有し、前記第１の交流入力端子21を定電圧ダイオー
ド直列回路10の一端に接続されている。Referring to FIG. 1, a grounding circuit according to one embodiment of the present invention includes first and second constant voltage diodes D1 and D2.
Are connected in series with the same polarity facing each other, and a constant voltage diode series circuit 10, and diodes D3, D4, D5,
And a diode bridge 20 made of D6. The diode bridge 20 has first and second AC input terminals 21 and 22, and positive and negative output terminals 23 and 24.
And the first AC input terminal 21 is connected to one end of the constant voltage diode series circuit 10.
サイリスタTh1は、ダイオードブリッジ20の正および
負の出力端子23および24に、アノードおよびカソード
を、それぞれ接続されている。第１および第２の抵抗R1
およびR2は、正および負の出力端子23および24にそれぞ
れの一端を接続され、それぞれの他端をサイリスタTh1
のゲートに共通に接続されている。この結果、第１およ
び第２の抵抗からなる分圧回路の分圧値がサイリスタTh
1のゲートに入力される。The thyristor Th1 has an anode and a cathode connected to the positive and negative output terminals 23 and 24 of the diode bridge 20, respectively. First and second resistors R1
And R2 have one end connected to the positive and negative output terminals 23 and 24 and the other end connected to the thyristor Th1.
Are commonly connected to the gates. As a result, the voltage dividing value of the voltage dividing circuit including the first and second resistors is changed to the thyristor Th.
Input to 1 gate.
ダイオードブリッジ20の第２の交流入力端子22は、給
電アースS.Eに接続され、定電圧ダイオード直列回路10
の他端が、局舎アースST.Eに接続されている。その代り
に、定電圧ダイオード直列回路10の他端が給電アースS.
Eに、ダイオードブリッジ20の第２の交流入力端子22が
局舎アースST.Eに接続されていてもよい。The second AC input terminal 22 of the diode bridge 20 is connected to the power supply ground SE, and is connected to the constant voltage diode series circuit 10.
Is connected to the office building ground ST.E. Instead, the other end of the constant voltage diode series circuit 10 is connected to the power supply ground S.
E, the second AC input terminal 22 of the diode bridge 20 may be connected to the station ground ST.E.
ここで、第１図および第２図を参照して、本発明の動
作を説明する。給電アースS.Eの接地抵抗が上昇し、局
舎アースST.Eとの間の接地電圧VGが定電圧ダイオードD1
またはD2のツエーナー電圧VZより高くなると、局舎アー
ス電流I2が流れ始める（Ａ点）。接地電圧VGとツエナー
電圧VZの差の電圧の分圧値が接地異常電圧VZ′に達した
時、サイリスタTh1がオンする（Ｂ点）。このとき、接
地電圧VGは定電圧ダイオードD1またはD2のツエナー電圧
VZにほぼ等しい値に制限される（Ｃ〜Ｄ点）。ここで、
接地異常電圧VZ′は抵抗R1およびR2の抵抗値の比を変え
ることにより任意に選択できる。Here, the operation of the present invention will be described with reference to FIG. 1 and FIG. Ground resistance increases feeding ground SE, the ground voltage V G is constant-voltage diode between the central office ground ST.E D1
Or becomes higher than the Tsuena voltage V Z of D2, the station ground current I 2 begins to flow (A point). When divided voltage value of the voltage difference between the ground voltage V G and the Zener voltage V Z reaches the ground fault voltage V Z ', thyristor Th1 is turned on (B point). At this time, the ground voltage V G is Zener voltage of the constant voltage diode D1 or D2
Is limited to a value substantially equal to V Z (C-D point). here,
The abnormal ground voltage V Z 'can be arbitrarily selected by changing the ratio of the resistance values of the resistors R1 and R2.
［発明の効果］ 以上説明したように本発明によれば、給電アースの接
地抵抗異常による接地電圧を、抵抗の分圧比により容易
に高くすることが可能で、かつ定電圧ダイオード直列回
路及びダイオードブリッジを含むバイパス回路中の動作
電圧を低く抑えることができるので、熱損失を小さくで
きる効果がある。[Effects of the Invention] As described above, according to the present invention, it is possible to easily increase the ground voltage due to the ground resistance abnormality of the power supply ground by the voltage dividing ratio of the resistance, and to connect the constant voltage diode series circuit and the diode bridge. Since the operating voltage in the bypass circuit including the above can be suppressed low, there is an effect that the heat loss can be reduced.
第１図は本発明の一実施例による接地回路の回路図、第
２図は第１図の接地回路の動作特性図、第３図は従来の
接地回路の回路図である。 D1,D1′D1″,D2,D2′,D2″……定電圧ダイオード、D3,D
4,D5,D6……ダイオード、R1,R2……抵抗、Th1……サイ
リスタ、S.E……給電アース、ST.E……局舎アース。FIG. 1 is a circuit diagram of a ground circuit according to an embodiment of the present invention, FIG. 2 is an operation characteristic diagram of the ground circuit of FIG. 1, and FIG. 3 is a circuit diagram of a conventional ground circuit. D1, D1'D1 ", D2, D2 ', D2" ... Constant voltage diode, D3, D
4, D5, D6: Diode, R1, R2: Resistor, Th1: Thyristor, SE: Power supply ground, ST.E: Station building ground.
Claims (1)
いに同じ極性が向き合った状態で直列に接続した定電圧
ダイオード直列回路と； 第１および第２の交流入力端子と正および負の出力端子
とを有し、前記第１の交流入力端子を前記定電圧ダイオ
ード直列回路の一端に接続されたダイオードブリッジ
と； 該ダイオードブリッジの前記正および負の出力端子に、
アノードおよびカソードを、それぞれ接続されたサイリ
スタと； 前記正および負の出力端子にそれぞれの一端を接続さ
れ、それぞれの他端を前記サイリスタのゲートに共通に
接続された第１および第２の抵抗と；を含み、前記定電
圧ダイオード直列回路の他端が、給電アースおよび局舎
アースのうちの一方に接続され、前記ダイオードブリッ
ジの前記第２の交流入力端子が、前記給電アースおよび
前記局舎アースのうちの他方に接続されていることを特
徴とする接地回路。1. A constant voltage diode series circuit in which first and second constant voltage diodes are connected in series with the same polarity facing each other; first and second AC input terminals and positive and negative outputs. A diode bridge having a first AC input terminal connected to one end of the constant voltage diode series circuit; and a positive and negative output terminal of the diode bridge;
Thyristors respectively connected to the anode and the cathode; first and second resistors each having one end connected to the positive and negative output terminals and the other end commonly connected to the gate of the thyristor; The other end of the constant voltage diode series circuit is connected to one of a power supply ground and a station ground, and the second AC input terminal of the diode bridge is connected to the power supply ground and the station ground. Grounding circuit connected to the other of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63316467A JP2803116B2 (en) | 1988-12-16 | 1988-12-16 | Ground circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63316467A JP2803116B2 (en) | 1988-12-16 | 1988-12-16 | Ground circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02164227A JPH02164227A (en) | 1990-06-25 |
| JP2803116B2 true JP2803116B2 (en) | 1998-09-24 |
Family
ID=18077421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63316467A Expired - Lifetime JP2803116B2 (en) | 1988-12-16 | 1988-12-16 | Ground circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2803116B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116488126B (en) * | 2023-06-21 | 2023-09-05 | 华海通信技术有限公司 | Pressure relief device, submarine cable system and submarine cable voltage relief method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531707A (en) * | 1978-08-21 | 1980-03-06 | Tsubakimoto Chain Co | Slat conveyor |
-
1988
- 1988-12-16 JP JP63316467A patent/JP2803116B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02164227A (en) | 1990-06-25 |
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