JP2013005484A - Overvoltage/overcurrent protection system and overvoltage/overcurrent protection method - Google Patents
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本発明は、過電圧／過電流保護システムおよび過電圧／過電流保護方法に関するものである。 The present invention relates to an overvoltage / overcurrent protection system and an overvoltage / overcurrent protection method.
情報通信機器は、電源線や通信線が接続されるため、それらの線から雷サージのような過電圧／過電流が侵入すると、機器の故障、誤動作が発生し、大きな社会的損失を生じることがある。このような過電圧／過電流による機器の故障や誤動作を防止するためには、侵入する過電圧／過電流を機器の過電圧／過電流耐力以下に抑制する必要がある。そのため、通信機器の雷保護方法について多くの研究、開発が行われている（例えば、非特許文献１）。この中で、最も有効な対策方法として、「家屋一括アレスタ型共通接地法」が提案されている。この雷保護方法は、電力用避雷器と加入者保安器を家屋への引き込み口に設置するとともに、それらの接地と家屋内の機器の接地を全て共通化する方法である（特許文献１）。 Information and communication equipment is connected to power lines and communication lines. If overvoltage / overcurrent such as lightning surge enters through these lines, equipment failure or malfunction may occur, resulting in significant social loss. is there. In order to prevent the breakdown and malfunction of the device due to such overvoltage / overcurrent, it is necessary to suppress the invading overvoltage / overcurrent below the overvoltage / overcurrent tolerance of the device. Therefore, many researches and developments have been made on lightning protection methods for communication devices (for example, Non-Patent Document 1). Among them, the “house collective arrester type common grounding method” has been proposed as the most effective countermeasure method. This lightning protection method is a method in which a power arrester and a subscriber protector are installed at the entrance to a house, and the grounding of these devices and the grounding of equipment in the house are all made common (Patent Document 1).
図４は、家屋一括アレスタ型共通接地法を示す図である。しかし、この雷保護方法は、電力線への避雷器設置、家屋の接地の共通化など既存の家屋への適用が困難なこともあり、導入は進んでいない。現在一般的に使用されている通信機器の雷保護方法は、「個別型バイパスアレスタ法」である。 FIG. 4 is a diagram showing a house collective arrester type common grounding method. However, this lightning protection method is difficult to apply to existing houses, such as installation of lightning arresters on power lines and common grounding of houses. The currently used lightning protection method for communication equipment is the “individual bypass arrester method”.
図５は、個別型バイパスアレスタ法を示す図である。この方法は、機器単体の電源線ポートと通信線ポートにＳＰＤ（サージ保護デバイス）を設置し、それらを接地線で接続することでバイパス回路を構成するもので、日本の接地形態（分離接地）を変更することなく、機器個別で対応可能なため導入が容易である。また、通信機器設置台数が少ない場合は経済性にも優れている（特許文献２、３）
近年の情報通信機器は、ＦＴＴＨやｘＤＳＬの普及により高速通信回線への接続が前提となり、さらに家庭内に構築されるネットワークに接続されるようになってきた。そのため情報通信機器のインタフェースは、電源線ポート、通信線ポート（通信回線への接続）に加え、内線ポートとして家屋内の通信機器との回線接続用ポート、イーサネットポート、ＴＶ等の接続用の同軸ケーブルポートなどが設けられ、インタフェースは多種多様になっている。このような設備形態では、個別型バイパスアレスタ法による雷保護回路を機器に実装すると、全てのインタフェースに避雷回路を組み込まなくてはならず、機器の寸法の増大や、実装費用の増加といった問題がある。また、家屋内のネットワークに接続される機器全てで、個別型バイパスアレスタ法を適用しなければならないという問題もある。さらに、機器がネットワークに接続されるため、雷サージのような過電圧／過電流の流出入経路が特定できないため、それぞれの機器に組み込まれる保護回路の動作レベルや耐量などの保護協調が図れない可能性もある。
FIG. 5 is a diagram showing the individual bypass arrester method. In this method, SPD (surge protection device) is installed in the power line port and communication line port of a single device, and they are connected by a ground line to form a bypass circuit. It is easy to install because it can be handled individually without changing the device. Moreover, when there are few communication apparatus installation numbers, it is excellent also in economical efficiency (
In recent years, information communication equipment has been premised on connection to a high-speed communication line due to the spread of FTTH and xDSL, and has been connected to a network built in a home. Therefore, in addition to power line ports and communication line ports (connection to communication lines), the interface of information communication equipment is a connection port for communication equipment in the house as an extension port, an Ethernet port, a coaxial for connecting a TV, etc. Cable ports and the like are provided, and the interfaces are diverse. In such a facility configuration, when a lightning protection circuit using the individual bypass arrester method is mounted on a device, it is necessary to incorporate a lightning protection circuit on all interfaces, which causes problems such as an increase in the size of the device and an increase in mounting cost. is there. There is also a problem that the individual bypass arrester method must be applied to all devices connected to the home network. In addition, since the equipment is connected to the network, the inflow / outflow path of overvoltage / overcurrent such as lightning surge cannot be specified, so protection coordination such as the operation level and withstand capability of the protection circuit built into each equipment may not be achieved. There is also sex.
ＦＴＴＨ環境では、通信線が光ファイバケーブルとなるため、雷サージのような外乱信号１が通信回線から流入したり、流出したりすることは無い。そのため、雷サージのような過電圧／過電流は機器の電源線ポートからしか侵入しないことになる。しかし、ＦＴＴＨ環境においてホームゲートウェイなどの情報通信機器の雷故障頻度は高いことが知られている。 In the FTTH environment, since the communication line is an optical fiber cable, the disturbance signal 1 such as a lightning surge does not flow in or out from the communication line. Therefore, an overvoltage / overcurrent such as a lightning surge can only enter from the power line port of the device. However, it is known that lightning failure frequency of information communication devices such as home gateways is high in the FTTH environment.
図６は、ＦＴＴＨ環境における一般的な家屋内の配線形態を示す図である。家屋に引き込まれる電力線は一般に単相３線方式であり、引き込み口の分電盤から単相２線により家屋内に配線されている。したがって家屋内の保安用接地を設ける機器（洗濯機、給湯器、エアコン等、以下、「保安用接地機器」）と、家屋内ネットワークに接続される情報通信機器が同じ屋内電力線に接続されることになる。情報通信機器への雷サージの流出入経路は次のようになる。低圧配電線に雷過電圧が発生すると、単相３線の引き込み線３線（Ｌ１、Ｌ２、Ｎ）にほぼ同じ雷過電圧が発生し家屋に侵入する。保安用接地機器は一般的に屋内電力線と接地間に避雷器が設置されているため、保安用接地機器が接続された電圧相（Ｌ１、Ｎ）は、その機器内の避雷器が雷サージにより動作することで大地電位となる。一方保安用接地機器が接続されていない屋内電力線の電圧相のＬ２のみ対地電位が高いままである。そのため、それぞれの電圧相に接続されたネットワーク機器間に電位差が発生することになる。この電位差が情報通信機器の電源線ポート、内線ポート間の過電圧耐力以上になった場合に情報通信機器が故障することになる。この場合保安用接地機器が必ずしもネットワークに接続されている必要は無いため、ほとんどの住宅でこのような設備構成となる。 FIG. 6 is a diagram illustrating a wiring pattern in a general house in the FTTH environment. The power line drawn into the house is generally a single-phase three-wire system, and is wired into the house by a single-phase two-wire from the distribution board at the inlet. Therefore, equipment that provides safety ground in the house (washing machines, water heaters, air conditioners, etc., hereinafter referred to as “safety ground equipment”) and information communication equipment connected to the home network must be connected to the same indoor power line. become. The lightning surge inflow / outflow route to the information communication equipment is as follows. When lightning overvoltage is generated in the low-voltage distribution line, almost the same lightning overvoltage is generated in the three single-phase three-wire lead-in wires (L1, L2, N) and enters the house. Since a grounding device for safety is generally provided with a lightning arrester between the indoor power line and ground, the lightning arrester in the device is operated by a lightning surge in the voltage phase (L1, N) to which the safety grounding device is connected. It becomes a ground potential. On the other hand, the ground potential remains high only in the voltage phase L2 of the indoor power line to which no security grounding device is connected. Therefore, a potential difference occurs between network devices connected to each voltage phase. When this potential difference exceeds the overvoltage tolerance between the power line port and the extension port of the information communication device, the information communication device will fail. In this case, since the security grounding device does not necessarily need to be connected to the network, such a facility configuration is used in most houses.
上述したように、情報通信機器は、電源線ポートや通信線ポートといったインタフェースを複数持つという特徴のため、外部からの雷サージのような過電圧／過電流に対して脆弱であり、過電圧／過電流保護が重要となる。これはＦＴＴＨ環境に設置する外部へメタルの通信線を持たない情報通信機器においても同様である。 As described above, the information communication device is characterized by having a plurality of interfaces such as a power supply line port and a communication line port, and thus is vulnerable to an overvoltage / overcurrent such as a lightning surge from the outside. Protection is important. The same applies to an information communication device that does not have an external metal communication line installed in the FTTH environment.
これらの機器の雷保護方法としては、家屋一括アレスタ型共通接地法が最も効果的との報告があるが、既存建物への適用が困難であるという課題がある。また、対策として個別型バイパスアレスタ法が一般的であるが、複数のインタフェースを持つ情報通信機器へ適用する場合、全てのインタフェースに避雷回路を設ける必要があり、実装スペース増およびコスト増といった問題がある。さらに家屋内でネットワークを構成するようになったため、多くの機器がネットワークに接続されることになり、全ての機器で雷保護が必要になるという問題もある。 As a lightning protection method for these devices, there has been a report that the house collective arrester type common grounding method is most effective, but there is a problem that it is difficult to apply to existing buildings. Also, the individual bypass arrester method is generally used as a countermeasure, but when applied to information communication equipment with multiple interfaces, it is necessary to provide lightning protection circuits for all interfaces, resulting in problems such as increased mounting space and cost. is there. Furthermore, since the network is now configured in the house, many devices are connected to the network, and there is a problem that lightning protection is required for all devices.
したがって、ＦＴＴＨ環境において家屋内でネットワークが構成され、複数の情報通信機器が接続された家屋内の情報通信機器の経済的で効果的な過電圧／過電流保護システムを提供することが要望される。 Therefore, it is desired to provide an economical and effective overvoltage / overcurrent protection system for a home information communication device in which a network is configured in the home in a FTTH environment and a plurality of information communication devices are connected.
本発明は、上記事情に鑑みなされたものであり、単相３線式電力線に生じる過電圧／過電流から情報通信機器を保護するための過電圧／過電流保護システムおよび過電圧／過電流保護方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and provides an overvoltage / overcurrent protection system and an overvoltage / overcurrent protection method for protecting an information communication device from overvoltage / overcurrent generated in a single-phase three-wire power line. The purpose is to do.
上記の課題を解決するために、第１の本発明は、単相３線式電力線の一方の電圧線と接地線間および他方の電圧線と接地線間のそれぞれに情報通信機器が接続され、過電圧保護回路を有する保安用接地機器が一方の電圧線〜接地線間または他方の電圧線〜接地線間に接続された環境における過電圧／過電流保護システムであって、１以上のサージ保護デバイスと、一方の電圧線〜接地線間または他方の電圧線〜接地線間に発生した過電圧／過電流を前記サージ保護デバイスを介して前記保安用接地機器に導く手段を備えることを特徴とする過電圧／過電流保護システムをもって解決手段とする。 In order to solve the above-described problem, the first aspect of the present invention is that an information communication device is connected between one voltage line and a ground line of a single-phase three-wire power line and between the other voltage line and the ground line, An overvoltage / overcurrent protection system in an environment in which a safety grounding device having an overvoltage protection circuit is connected between one voltage line and a ground line or between the other voltage line and a ground line, comprising: one or more surge protection devices; And means for guiding an overvoltage / overcurrent generated between one voltage line and the ground line or between the other voltage line and the ground line to the safety ground device via the surge protection device. An overcurrent protection system is the solution.
例えば、第１の本発明において、一方の電圧線〜接地線間に接続された情報通信機器と他方の電圧線〜接地線間に接続された情報通信機器とが２線の通信線で接続され、前記１以上のサージ保護デバイスのそれぞれは、２つの保護端子と１つの接地端子を備え、前記１以上のサージ保護デバイスは、２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスと、２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第３のサージ保護デバイスと、２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第４のサージ保護デバイスとを含んでなり、前記第１、３のサージ保護デバイスの各接地端子を互いに接続し、前記第２、４のサージ保護デバイスの各接地端子を互いに接続する。 For example, in the first aspect of the present invention, an information communication device connected between one voltage line and the ground line and an information communication device connected between the other voltage line and the ground line are connected by two communication lines. Each of the one or more surge protection devices includes two protection terminals and one ground terminal, and the one or more surge protection devices have two protection terminals connected to one voltage line and a ground line, respectively. 1 surge protection device, a second surge protection device in which two protection terminals are connected to the other voltage line and the ground line, respectively, and a third surge protection device in which two protection terminals are connected to one and the other of the communication lines, respectively. A surge protection device, and a fourth surge protection device having two protection terminals connected to one of the communication lines and the other, respectively, and the ground terminals of the first and third surge protection devices are connected to each other. And connects each ground terminal of the surge protection device of the second and fourth one another.
例えば、第１の本発明において、前記１以上のサージ保護デバイスのそれぞれは、２つの保護端子と１つの接地端子を備え、前記１以上のサージ保護デバイスは、２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスとを含んでなり、前記第１、２のサージ保護デバイスの各接地端子を互いに接続する。 For example, in the first aspect of the present invention, each of the one or more surge protection devices includes two protection terminals and one ground terminal, and the one or more surge protection devices each have two protection terminals at one voltage. A first surge protection device connected to the line and the ground line, and a second surge protection device having two protection terminals connected to the other voltage line and the ground line, respectively. Connect the ground terminals of the protective device to each other.
例えば、第１の本発明において、前記１以上のサージ保護デバイスは、２つの保護端子と１つの接地端子を備える１つのサージ保護デバイスを含み、前記２つの保護端子をそれぞれ一方の電圧線、他方の電圧線に接続し、前記接地端子を接地線に接続する。 For example, in the first aspect of the present invention, the one or more surge protection devices include one surge protection device having two protection terminals and one ground terminal, each of the two protection terminals being one voltage line and the other. And the ground terminal is connected to the ground line.
第２の本発明は、単相３線式電力線の一方の電圧線〜接地線間および他方の電圧線〜接地線間のそれぞれに情報通信機器が接続され、過電圧保護回路を有する保安用接地機器が一方の電圧線〜接地線間または他方の電圧線〜接地線間に接続された環境における過電圧／過電流保護システムが行う過電圧／過電流保護方法であって、前記過電圧／過電流保護システムは、１以上のサージ保護デバイスを備え、前記過電圧／過電流保護方法は、一方の電圧線〜接地線間または他方の電圧線〜接地線間に発生した過電圧／過電流を前記サージ保護デバイスを介して前記保安用接地機器に導くものであることを特徴とする過電圧／過電流保護方法をもって解決手段とする。 According to a second aspect of the present invention, a safety grounding device having an overvoltage protection circuit in which an information communication device is connected between one voltage line and a grounding line and between the other voltage line and a grounding line of a single-phase three-wire power line. Is an overvoltage / overcurrent protection method performed by an overvoltage / overcurrent protection system in an environment connected between one voltage line and the ground line or between the other voltage line and the ground line, the overvoltage / overcurrent protection system comprising: The overvoltage / overcurrent protection method includes an overvoltage / overcurrent generated between one voltage line and the ground line or between the other voltage line and the ground line via the surge protection device. The overvoltage / overcurrent protection method is characterized in that the solution is led to the safety grounding device.
例えば、第２の本発明において、一方の電圧線〜接地線間に接続された情報通信機器と他方の電圧線〜接地線間に接続された情報通信機器とが２線の通信線で接続され、前記１以上のサージ保護デバイスのそれぞれは、２つの保護端子と１つの接地端子を備え、前記１以上のサージ保護デバイスは、２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスと、２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第３のサージ保護デバイスと、２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第４のサージ保護デバイスとを含んでなり、前記第１、３のサージ保護デバイスの各接地端子を互いに接続し、前記第２、４のサージ保護デバイスの各接地端子を互いに接続する。 For example, in the second aspect of the present invention, an information communication device connected between one voltage line and the ground line and an information communication device connected between the other voltage line and the ground line are connected by two communication lines. Each of the one or more surge protection devices includes two protection terminals and one ground terminal, and the one or more surge protection devices have two protection terminals connected to one voltage line and a ground line, respectively. 1 surge protection device, a second surge protection device in which two protection terminals are connected to the other voltage line and the ground line, respectively, and a third surge protection device in which two protection terminals are connected to one and the other of the communication lines, respectively. A surge protection device, and a fourth surge protection device having two protection terminals connected to one of the communication lines and the other, respectively, and the ground terminals of the first and third surge protection devices are connected to each other. And connects each ground terminal of the surge protection device of the second and fourth one another.
例えば、第２の本発明において、前記１以上のサージ保護デバイスのそれぞれは、２つの保護端子と１つの接地端子を備え、前記１以上のサージ保護デバイスは、２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスとを含んでなり、前記第１、２のサージ保護デバイスの各接地端子を互いに接続する。 For example, in the second aspect of the present invention, each of the one or more surge protection devices includes two protection terminals and one ground terminal, and the one or more surge protection devices each have two protection terminals connected to one voltage. A first surge protection device connected to the line and the ground line, and a second surge protection device having two protection terminals connected to the other voltage line and the ground line, respectively. Connect the ground terminals of the protective device to each other.
例えば、第２の本発明において、前記１以上のサージ保護デバイスは、２つの保護端子と１つの接地端子を備える１つのサージ保護デバイスを含み、前記２つの保護端子をそれぞれ一方の電圧線、他方の電圧線に接続し、前記接地端子を接地線に接続する。 For example, in the second aspect of the present invention, the one or more surge protection devices include one surge protection device including two protection terminals and one ground terminal, each of the two protection terminals being one voltage line and the other. And the ground terminal is connected to the ground line.
本発明によれば、単相３線式電力線に生じる過電圧／過電流から情報通信機器を保護することができる。 ADVANTAGE OF THE INVENTION According to this invention, an information communication apparatus can be protected from the overvoltage / overcurrent which generate | occur | produces in a single phase 3 wire type power line.
以下、本発明の実施の形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図１は、第１の実施の形態に係る過電圧／過電流保護システムの構成を示す図である。 FIG. 1 is a diagram showing a configuration of an overvoltage / overcurrent protection system according to the first embodiment.
ＦＴＴＨ環境での情報通信機器の雷保護は、電力線の各線に発生する過電圧／過電流を抑制することにある。 The lightning protection of the information communication device in the FTTH environment is to suppress overvoltage / overcurrent generated in each line of the power line.
そこで、単相３線式電力線のＬ１相に接続している情報通信機器１とＬ２相に接続している情報通信機器２を通信線で接続し、それぞれの機器の電源線ポートと通信線ポートにサージ保護デバイスＳＰＤ１〜４を設置する個別バイパスアレスタ法を適用する。
Therefore, the information communication device 1 connected to the L1 phase of the single-phase three-wire power line and the
サージ保護デバイスＳＰＤ１の保護端子Ｐ１、Ｐ２は、それぞれＬ１相の電圧線Ｌ１、接地線Ｎに接続される。 Protection terminals P1 and P2 of surge protection device SPD1 are connected to L1-phase voltage line L1 and ground line N, respectively.
サージ保護デバイスＳＰＤ２の保護端子Ｐ１、Ｐ２は、それぞれＬ２相の電圧線Ｌ２、接地線Ｎに接続される。 The protection terminals P1 and P2 of the surge protection device SPD2 are connected to the L2-phase voltage line L2 and the ground line N, respectively.
サージ保護デバイスＳＰＤ３の保護端子Ｐ１、Ｐ２は、それぞれ通信線Ｔ１、Ｔ２に接続される。 The protection terminals P1 and P2 of the surge protection device SPD3 are connected to the communication lines T1 and T2, respectively.
サージ保護デバイスＳＰＤ４の保護端子Ｐ１、Ｐ２は、それぞれ通信線Ｔ１、Ｔ２に接続される。 The protection terminals P1 and P2 of the surge protection device SPD4 are connected to the communication lines T1 and T2, respectively.
サージ保護デバイスＳＰＤ１、ＳＰＤ３の各接地端子Ｐ３は互いに接続される。 The ground terminals P3 of the surge protection devices SPD1 and SPD3 are connected to each other.
サージ保護デバイスＳＰＤ２、ＳＰＤ４の各接地端子Ｐ３は互いに接続される。 The ground terminals P3 of the surge protection devices SPD2 and SPD4 are connected to each other.
さらに、Ｌ１相もしくはＬ２相に保安用接地を設ける機器（保安用接地機器４）を設置することを特徴とする（図１では、Ｌ１相に設置）。 Furthermore, a device (security ground device 4) for providing a safety ground in the L1 phase or the L2 phase is installed (installed in the L1 phase in FIG. 1).
保安用接地機器４は、Ｌ１相の電圧線Ｌ１〜接地線Ｎ間またはＬ２相の電圧線Ｌ２〜接地線Ｎ間に接続される。保安用接地機器４内の過電圧保護回路に至る接地端子ＦＧは接地される。 The safety grounding device 4 is connected between the L1 phase voltage line L1 and the ground line N or between the L2 phase voltage line L2 and the ground line N. The ground terminal FG reaching the overvoltage protection circuit in the safety ground device 4 is grounded.
このような構成とすることで、Ｌ１相、Ｎ相に発生した過電圧／過電流は、保安用接地機器４内の過電圧保護回路により大地に放流し、Ｌ２相に発生した過電圧／過電流は、情報通信機器２に設置したサージ保護デバイスにより通信線にバイパスし、さらに情報通信機器１に設置したサージ保護デバイスによりＬ１相にバイパスし、保安用接地機器４内の過電圧保護回路により大地に放流する。
With such a configuration, the overvoltage / overcurrent generated in the L1 phase and the N phase is discharged to the ground by the overvoltage protection circuit in the safety ground device 4, and the overvoltage / overcurrent generated in the L2 phase is Bypassed to the communication line by the surge protection device installed in the
これにより電力線に発生した過電圧／過電流を抑制することができ、情報通信機器１、２を過電圧／過電流から保護することができる。
Thereby, the overvoltage / overcurrent generated in the power line can be suppressed, and the
さらに情報通信機器３の電源に発生する過電圧／過電流も同時に抑制することになり、雷保護が可能となる。 Furthermore, the overvoltage / overcurrent generated in the power supply of the information communication device 3 is also suppressed at the same time, and lightning protection is possible.
このように、Ｌ１相とＬ２相に情報通信機器を設置し、それらを通信線で接続し、それぞれにサージ保護デバイスによるバイパス回路を構成するとともに、Ｌ１相もしくはＬ２相に保安用接地機器４を設置し、その過電圧保護回路に至る接地端子ＦＧを接地することにより、家屋内全体の雷保護を実現することができる。 In this way, the information communication devices are installed in the L1 phase and the L2 phase, and they are connected by the communication lines, and each constitutes a bypass circuit by a surge protection device, and the safety ground device 4 is provided in the L1 phase or the L2 phase. By installing and grounding the ground terminal FG leading to the overvoltage protection circuit, lightning protection for the entire house can be realized.
図２は、第２の実施の形態に係る過電圧／過電流保護システムの構成を示す図である。 FIG. 2 is a diagram illustrating a configuration of an overvoltage / overcurrent protection system according to the second embodiment.
第２の実施の形態においては、単相３線式電力線のＬ１相およびＬ２相それぞれのコンセントＣ１、Ｃ２にサージ保護デバイスＳＰＤ５、６を設置し、その接地端子Ｐ３を接地線ＧＬで接続することを特徴とする。 In the second embodiment, surge protection devices SPD5 and SP2 are installed in the outlets C1 and C2 of the L1 phase and L2 phase of the single-phase three-wire power line, and the ground terminal P3 is connected by the ground line GL. It is characterized by.
サージ保護デバイスＳＰＤ５の保護端子Ｐ１、Ｐ２は、コンセントＣ１を介して、それぞれＬ１相の電圧線Ｌ１、接地線Ｎに接続される。 The protection terminals P1 and P2 of the surge protection device SPD5 are connected to the L1-phase voltage line L1 and the ground line N via the outlet C1, respectively.
サージ保護デバイスＳＰＤ６の保護端子Ｐ１、Ｐ２は、コンセントＣ２を介して、それぞれＬ２相の電圧線Ｌ２、接地線Ｎに接続される。 The protection terminals P1 and P2 of the surge protection device SPD6 are connected to the L2-phase voltage line L2 and the ground line N via the outlet C2, respectively.
サージ保護デバイスＳＰＤ５、ＳＰＤ６の各接地端子Ｐ３は、接地線ＧＬを介して互いに接続される。 The ground terminals P3 of the surge protection devices SPD5 and SPD6 are connected to each other via a ground line GL.
もちろん、第１の実施の形態と同様に、Ｌ１相もしくはＬ２相には保安用接地機器４を設置する。 Of course, as in the first embodiment, the safety ground device 4 is installed in the L1 phase or the L2 phase.
第２の実施の形態での雷保護は、以下のようになる。Ｌ１相、Ｎ相に発生した過電圧／過電流は、保安用接地機器４内の過電圧保護回路により大地に放流し、Ｌ２相に発生した過電圧／過電流は、Ｌ２相のコンセントＣ２のサージ保護デバイスＳＰＤ６から接地線を介してＬ１相のコンセントＣ１のサージ保護デバイスＳＰＤ５に流れ、さらにＬ１相の保安用接地機器４内の過電圧保護回路により大地に放流する。 Lightning protection in the second embodiment is as follows. The overvoltage / overcurrent generated in the L1 phase and N phase is discharged to the ground by the overvoltage protection circuit in the safety ground device 4, and the overvoltage / overcurrent generated in the L2 phase is the surge protection device for the L2 phase outlet C2. The current flows from the SPD 6 to the surge protection device SPD 5 of the L1-phase outlet C 1 through the ground line, and is further discharged to the ground by the overvoltage protection circuit in the L 1 -phase safety ground device 4.
これにより電力線に発生した過電圧／過電流を抑制することができ、情報通信機器１、２を過電圧／過電流から保護することができる。
Thereby, the overvoltage / overcurrent generated in the power line can be suppressed, and the
さらに情報通信機器３の電源に発生する過電圧／過電流も同時に抑制することになり、雷保護が可能となる。このように、Ｌ１相とＬ２相のコンセントにサージ保護デバイスを設置し、それらを接地線で接続し、Ｌ１相もしくはＬ２相に保安用接地機器を設置し、その過電圧保護回路に至る（ＦＧ端子）を接地することにより、家屋内全体の雷保護を実現することができる。 Furthermore, the overvoltage / overcurrent generated in the power supply of the information communication device 3 is also suppressed at the same time, and lightning protection is possible. In this way, surge protection devices are installed in the L1 phase and L2 phase outlets, connected to each other with a ground wire, and a safety grounding device is installed in the L1 or L2 phase, leading to the overvoltage protection circuit (FG terminal). ) Can be protected against lightning throughout the house.
図３は、第３の実施の形態に係る過電圧／過電流保護システムの構成を示す図である。 FIG. 3 is a diagram illustrating a configuration of an overvoltage / overcurrent protection system according to the third embodiment.
第３の実施の形態においては、単相３線式電力線を分岐させる分電盤５内で、Ｌ１相、Ｌ２相、Ｎ相にサージ保護デバイスＳＰＤ７を設置することを特徴とする。サージ保護デバイスＳＰＤ７の保護端子Ｐ１、Ｐ２は、それぞれＬ１相の電圧線Ｌ１、Ｌ２相の電圧線Ｌ２に接続される。サージ保護デバイスＳＰＤ７の接地端子Ｐ３は接地線Ｎに接続される。 The third embodiment is characterized in that surge protection devices SPD7 are installed in the L1, L2, and N phases in the distribution board 5 that branches the single-phase three-wire power line. The protection terminals P1 and P2 of the surge protection device SPD7 are connected to the L1-phase voltage line L1 and the L2-phase voltage line L2, respectively. The ground terminal P3 of the surge protection device SPD7 is connected to the ground line N.
もちろん、第１、第２の実施の形態と同様に、Ｌ１相もしくはＬ２相には保安用接地機器４を設置する。 Of course, as in the first and second embodiments, the safety grounding device 4 is installed in the L1 phase or the L2 phase.
第３の実施の形態での雷保護は、以下のようになる。Ｌ１相、Ｌ２相、Ｎ相に発生した過電圧／過電流は、分電盤５内のサージ保護デバイスＳＰＤ７により、保安用接地機器４の電力相に流れ、保安用接地機器内の過電圧保護回路により大地に放流する。 Lightning protection in the third embodiment is as follows. The overvoltage / overcurrent generated in the L1, L2, and N phases flows to the power phase of the safety ground device 4 by the surge protection device SPD7 in the distribution board 5 and is caused by the overvoltage protection circuit in the safety ground device. Release to the ground.
これにより電力線に発生した過電圧／過電流を抑制することができ、情報通信機器１、２、３を過電圧／過電流から保護することができることになり、雷保護が可能となる。
Thereby, the overvoltage / overcurrent generated in the power line can be suppressed, the
このように、分電盤内でＬ１相、Ｌ２相、Ｎ相にサージ保護デバイスを設置し、Ｌ１相もしくはＬ２相に保安用接地機器を設置し、その過電圧保護回路に至る（ＦＧ端子）を接地することにより、家屋内全体の雷保護を実現することができる。 In this way, surge protection devices are installed in the L1, L2, and N phases in the distribution board, safety grounding devices are installed in the L1 and L2 phases, and the overvoltage protection circuit is reached (FG terminal). By grounding, lightning protection for the whole house can be realized.
以上説明したように、各実施の形態に係る過電圧／過電流保護システムによれば、既存家屋におけるＦＴＴＨ環境において、実現が困難な家屋一括アレスタ型共通接地法と同様な雷保護システムが構築でき、家屋内の情報通信機器を保護することが可能となる。本実施の形態では、必要最小限の個別型バイパスアレスタ法を電力相のＬ１相およびＬ２相に設置することと、Ｌ１相もしくはＬ２相の一方に保安用接地機器を設置するのみの、簡単な構成であり、コストを抑えつつ過電圧保護を家屋全体で実現できることになる。また、家屋内に追加で必要となる配線も最小限とできるため、工事が簡単に行えるメリットもある。 As described above, according to the overvoltage / overcurrent protection system according to each embodiment, it is possible to construct a lightning protection system similar to the house collective arrester type common grounding method that is difficult to realize in an FTTH environment in an existing house, It becomes possible to protect information communication equipment in the house. In the present embodiment, a simple and simple method of installing the minimum required individual bypass arrester method in the L1 phase and the L2 phase of the power phase and installing a safety grounding device in either the L1 phase or the L2 phase. It is a structure, and overvoltage protection can be realized in the whole house while suppressing cost. In addition, since additional wiring required in the house can be minimized, there is also an advantage that the construction can be easily performed.
１、２、３…情報通信機器
４…保安用接地機器
５…分電盤
ＳＰＤ１〜ＳＰＤ７…サージ保護デバイス
Ｃ１、Ｃ２…コンセント
ＦＧ…接地端子
ＧＬ、Ｎ…接地線
Ｌ１、Ｌ２…電圧線
Ｐ１、Ｐ２…保護端子
Ｐ３…接地端子
Ｔ１、Ｔ２…通信線
1, 2, 3 ... Information communication equipment 4 ... Safety grounding equipment 5 ... Distribution board SPD1-SPD7 ... Surge protection device C1, C2 ... Outlet FG ... Grounding terminal GL, N ... Grounding wire L1, L2 ... Voltage wire P1, P2 ... Protective terminal P3 ... Ground terminal T1, T2 ... Communication line
Claims (8)
１以上のサージ保護デバイスと、
一方の電圧線〜接地線間または他方の電圧線〜接地線間に発生した過電圧／過電流を前記サージ保護デバイスを介して前記保安用接地機器に導く手段を
備えることを特徴とする過電圧／過電流保護システム。 An information communication device is connected between one voltage line and ground line of the single-phase three-wire power line, and between the other voltage line and ground line, and a safety ground device having an overvoltage protection circuit is connected between one voltage line and ground. An overvoltage / overcurrent protection system in an environment connected between lines or between the other voltage line and a ground line,
One or more surge protection devices;
Means for guiding an overvoltage / overcurrent generated between one voltage line and the ground line or between the other voltage line and the ground line to the safety ground device via the surge protection device is provided. Current protection system.
前記１以上のサージ保護デバイスのそれぞれは、２つの保護端子と１つの接地端子を備え、
前記１以上のサージ保護デバイスは、
２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、
２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスと、
２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第３のサージ保護デバイスと、
２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第４のサージ保護デバイスとを含んでなり、
前記第１、３のサージ保護デバイスの各接地端子を互いに接続し、
前記第２、４のサージ保護デバイスの各接地端子を互いに接続した
ことを特徴とする請求項１記載の過電圧／過電流保護システム。 An information communication device connected between one voltage line and the ground line and an information communication device connected between the other voltage line and the ground line are connected by two communication lines,
Each of the one or more surge protection devices comprises two protection terminals and one ground terminal;
The one or more surge protection devices are:
A first surge protection device in which two protection terminals are connected to one voltage line and a ground line, and
A second surge protection device having two protection terminals connected to the other voltage line and ground line,
A third surge protection device having two protection terminals connected to one of the communication lines and the other; and
A fourth surge protection device having two protection terminals connected to one of the communication lines and the other, respectively,
Connecting the ground terminals of the first and third surge protection devices to each other;
The overvoltage / overcurrent protection system according to claim 1, wherein the ground terminals of the second and fourth surge protection devices are connected to each other.
前記１以上のサージ保護デバイスは、
２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、
２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスとを含んでなり、
前記第１、２のサージ保護デバイスの各接地端子を互いに接続した
ことを特徴とする請求項１記載の過電圧／過電流保護システム。 Each of the one or more surge protection devices comprises two protection terminals and one ground terminal;
The one or more surge protection devices are:
A first surge protection device in which two protection terminals are connected to one voltage line and a ground line, and
A second surge protection device having two protection terminals respectively connected to the other voltage line and ground line,
The overvoltage / overcurrent protection system according to claim 1, wherein the ground terminals of the first and second surge protection devices are connected to each other.
前記２つの保護端子をそれぞれ一方の電圧線、他方の電圧線に接続し、
前記接地端子を接地線に接続した
ことを特徴とする請求項１記載の過電圧／過電流保護システム。 The one or more surge protection devices include one surge protection device comprising two protection terminals and one ground terminal;
The two protection terminals are connected to one voltage line and the other voltage line, respectively.
The overvoltage / overcurrent protection system according to claim 1, wherein the ground terminal is connected to a ground line.
前記過電圧／過電流保護システムは、
１以上のサージ保護デバイスを備え、
前記過電圧／過電流保護方法は、
一方の電圧線〜接地線間または他方の電圧線〜接地線間に発生した過電圧／過電流を前記サージ保護デバイスを介して前記保安用接地機器に導くものである
ことを特徴とする過電圧／過電流保護方法。 An information communication device is connected between one voltage line and ground line of a single-phase three-wire power line and between the other voltage line and ground line, and a safety ground device having an overvoltage protection circuit is connected between one voltage line and ground. An overvoltage / overcurrent protection method performed by an overvoltage / overcurrent protection system in an environment connected between lines or between the other voltage line and a ground line,
The overvoltage / overcurrent protection system is:
With one or more surge protection devices,
The overvoltage / overcurrent protection method is:
Overvoltage / overcurrent generated between one voltage line and the ground line or between the other voltage line and the ground line is led to the safety grounding device via the surge protection device. Current protection method.
前記１以上のサージ保護デバイスのそれぞれは、２つの保護端子と１つの接地端子を備え、
前記１以上のサージ保護デバイスは、
２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、
２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスと、
２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第３のサージ保護デバイスと、
２つの保護端子をそれぞれ前記通信線の一方、他方に接続した第４のサージ保護デバイスとを含んでなり、
前記第１、３のサージ保護デバイスの各接地端子を互いに接続し、
前記第２、４のサージ保護デバイスの各接地端子を互いに接続する
ことを特徴とする請求項５記載の過電圧／過電流保護方法。 An information communication device connected between one voltage line and the ground line and an information communication device connected between the other voltage line and the ground line are connected by two communication lines,
Each of the one or more surge protection devices comprises two protection terminals and one ground terminal;
The one or more surge protection devices are:
A first surge protection device in which two protection terminals are connected to one voltage line and a ground line, and
A second surge protection device having two protection terminals connected to the other voltage line and ground line,
A third surge protection device having two protection terminals connected to one of the communication lines and the other; and
A fourth surge protection device having two protection terminals connected to one of the communication lines and the other, respectively,
Connecting the ground terminals of the first and third surge protection devices to each other;
6. The overvoltage / overcurrent protection method according to claim 5, wherein the ground terminals of the second and fourth surge protection devices are connected to each other.
前記１以上のサージ保護デバイスは、
２つの保護端子をそれぞれ一方の電圧線、接地線に接続した第１のサージ保護デバイスと、
２つの保護端子をそれぞれ他方の電圧線、接地線に接続した第２のサージ保護デバイスとを含んでなり、
前記第１、２のサージ保護デバイスの各接地端子を互いに接続する
ことを特徴とする請求項５記載の過電圧／過電流保護方法。 Each of the one or more surge protection devices comprises two protection terminals and one ground terminal;
The one or more surge protection devices are:
A first surge protection device in which two protection terminals are connected to one voltage line and a ground line, and
A second surge protection device having two protection terminals respectively connected to the other voltage line and ground line,
The overvoltage / overcurrent protection method according to claim 5, wherein the ground terminals of the first and second surge protection devices are connected to each other.
前記２つの保護端子をそれぞれ一方の電圧線、他方の電圧線に接続し、
前記接地端子を接地線に接続する
ことを特徴とする請求項５記載の過電圧／過電流保護方法。 The one or more surge protection devices include one surge protection device comprising two protection terminals and one ground terminal;
The two protection terminals are connected to one voltage line and the other voltage line, respectively.
The overvoltage / overcurrent protection method according to claim 5, wherein the ground terminal is connected to a ground line.
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| JPH1141798A (en) * | 1997-07-14 | 1999-02-12 | Nippon Telegr & Teleph Corp <Ntt> | Lightning protection adapter |
| JP2000013984A (en) * | 1998-06-18 | 2000-01-14 | Nippon Telegr & Teleph Corp <Ntt> | Circuit for protecting communication equipment from lightning |
| US6282075B1 (en) * | 1999-03-10 | 2001-08-28 | Tii Industries, Inc. | Surge suppressor with virtual ground |
| JP2005117767A (en) * | 2003-10-07 | 2005-04-28 | Totsu Soken:Kk | Method of protecting residence from thunder |
| JP2011223769A (en) * | 2010-04-12 | 2011-11-04 | Nippon Telegr & Teleph Corp <Ntt> | Lightning surge protection circuit and design method of lightning surge protection circuit |
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| JPS57189517A (en) * | 1981-05-15 | 1982-11-20 | Nippon Telegraph & Telephone | Lightning surge protecting circuit |
| JPH073247U (en) * | 1993-06-16 | 1995-01-17 | 株式会社白山製作所 | Security device for wired communication equipment using commercial power supply |
| JPH09162971A (en) * | 1995-12-08 | 1997-06-20 | Matsushita Electric Ind Co Ltd | Lighting surge protection device |
| JPH1141798A (en) * | 1997-07-14 | 1999-02-12 | Nippon Telegr & Teleph Corp <Ntt> | Lightning protection adapter |
| JP2000013984A (en) * | 1998-06-18 | 2000-01-14 | Nippon Telegr & Teleph Corp <Ntt> | Circuit for protecting communication equipment from lightning |
| US6282075B1 (en) * | 1999-03-10 | 2001-08-28 | Tii Industries, Inc. | Surge suppressor with virtual ground |
| JP2005117767A (en) * | 2003-10-07 | 2005-04-28 | Totsu Soken:Kk | Method of protecting residence from thunder |
| JP2011223769A (en) * | 2010-04-12 | 2011-11-04 | Nippon Telegr & Teleph Corp <Ntt> | Lightning surge protection circuit and design method of lightning surge protection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7304069B2 (en) | 2017-06-01 | 2023-07-06 | クレオ・メディカル・リミテッド | Surgical instruments for cauterization and resection |
| JP7394482B2 (en) | 2017-06-01 | 2023-12-08 | クレオ・メディカル・リミテッド | Surgical instruments for cauterization and excision |
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| Publication number | Publication date |
|---|---|
| JP5613107B2 (en) | 2014-10-22 |
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