JPS59213222A - 1-wire ground-fault detecting relay with monitoring and inspecting functions - Google Patents

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

【発明の詳細な説明】 〔発明の属する技術分野〕 本発明はｊ線地絡検出継電器に関し、特にこの種の継電
器の不良を監視、点検するこみ？こ１関する。[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] The present invention relates to a J-line ground fault detection relay, and in particular to monitoring and checking for defects in this type of relay. Regarding this one.

〔従来技術とその問題点〕[Prior art and its problems]

１線地絡検出継電器では静止形の回路で１線地絡を検出
し、出力信号（遮断器トリップ信号）を発生させる。従
来の１線地絡検出継電器はこのような出力信号を出す基
本機能のみを有し、継電器自体の不良は点検試験で発見
するという方法が採られていた。すなわち、点検機能付
きてないため、あるいは点検機能があっても点検できる
電圧範囲が狭いために、不良の発見が遅れてしまう欠点
があった。すなわち高抵抗接地系統に１線地絡事故が発
生した場合、その地絡した相の相電圧はｊＯ０％地絡の
とき零となる。第１図は３相電力系統が１線完全地絡し
たときのベクトル図であって、Ｕ相が１００％地絡する
と、このＵ相の′電圧Ｖａは零となり、■相の電圧Ωｂ
とＷ相の電圧Ｖｃにはそれぞれ零相電圧ＱＯが重ね合わ
される。この零相電圧さが等しく、位相はこれらと１２
０度差になる。A one-wire ground fault detection relay uses a static circuit to detect a one-wire ground fault and generates an output signal (breaker trip signal). Conventional one-wire ground fault detection relays have only the basic function of outputting such an output signal, and defects in the relay itself have been discovered through inspection tests. That is, there is a drawback that the detection of defects is delayed because the inspection function is not included, or even if there is an inspection function, the voltage range that can be inspected is narrow. That is, when a one-line ground fault occurs in a high-resistance ground system, the phase voltage of the ground faulted phase becomes zero at jO0% ground fault. Figure 1 is a vector diagram when a one-wire complete ground fault occurs in a three-phase power system. When the U phase has a 100% ground fault, the voltage Va of the U phase becomes zero, and the voltage Ωb of the phase II
A zero-phase voltage QO is superimposed on the and W-phase voltages Vc, respectively. These zero-sequence voltages are equal, and the phase is 12
The difference will be 0 degrees.

よって健全相ずなわち■相とＷ相の電圧ｖｂｂならびに
Ｖｃｃは となるが、これらの電圧の大きさは Ｖｂｂ＝Ｖｃｃ＝＝−７ｍ　ｖｂ　＝　Ｊ３　Ｖｃ　＝
　Ｅ　Ｖ。Therefore, the voltages vbb and Vcc of the healthy phases, that is, the ■ phase and the W phase, are as follows, and the magnitude of these voltages is Vbb = Vcc = = -7m vb = J3 Vc =
EV.

となる。よってＵ相が１００係地絡のとき発生する零相
過電圧は（１）式となる。becomes. Therefore, the zero-sequence overvoltage that occurs when the U phase has a 100% ground fault is expressed by equation (1).

すなわち第１図においてＰ点と中性点Ｎの間の３ｖＯな
る電圧ベクトルが、この継電器が見る零相過電圧である
。That is, in FIG. 1, a voltage vector of 3vO between point P and neutral point N is the zero-sequence overvoltage seen by this relay.

ところでこの零相過電圧を模棲的に発生させて継電器の
動作を点検する方法として、１相の゛電圧を零に低下さ
せる方法が提案されているが、これによる零相過信、圧
は第２図に示されるように８点と８点の間に発生するＭ
Ｏである。すなわち１００チ地絡の場合の３３％電圧し
か発生しない。一方継電器がこの零相過電圧を検出する
ために設けるタップのタップ値は通常１５％から４５％
である。By the way, as a method to simulate the zero-sequence overvoltage and check the operation of the relay, a method has been proposed in which the voltage of one phase is reduced to zero. As shown in the figure, M occurs between points 8 and 8.
It is O. In other words, only 33% of the voltage generated in the case of a 100-chip ground fault is generated. On the other hand, the tap value of the tap provided by the relay to detect this zero-sequence overvoltage is usually 15% to 45%.
It is.

それ故従来方法では継電器のタップ全域をカッ（−して
動作を点検することができないから、継電器の不良を知
らずに運転していて系統の１線池絡事故を検出できない
という致命的な欠点があった。Therefore, in the conventional method, it is not possible to inspect the operation by cutting the entire tap area of the relay, which has the fatal drawback of not being able to detect a single-wire battery fault in the system due to operation without knowing that the relay is defective. there were.

〔発明の目的〕[Purpose of the invention]

この発明は継電、器の不良を監視すると共に遮断器のト
リップ回路をロックしなくても広い電圧範囲で動作点検
ができる監視・点検機能付き１線地絡検出継電器を提供
することを目的とｒる。An object of the present invention is to provide a one-wire ground fault detection relay with a monitoring and inspection function that can monitor failures in relays and devices and perform operational inspections over a wide voltage range without locking the trip circuit of the circuit breaker. ru.

〔発明の要点〕[Key points of the invention]

この発明は２組の零相過電圧検出要素を備え、雨検出要
素の出力の排他的論理和を条件として常時出力すると共
に、この２組の零相過電圧検出要素の入力側の１相の電
圧極性を個別に逆転させることにより、遮断器のトリッ
プ回路をロックせずに点検監視をしようとするものであ
る。The present invention includes two sets of zero-phase overvoltage detection elements, and always outputs the exclusive OR of the outputs of the rain detection elements, and also detects the voltage polarity of one phase on the input side of the two sets of zero-phase overvoltage detection elements. By individually reversing the circuit breaker's trip circuit, inspection and monitoring can be performed without locking the circuit breaker's trip circuit.

〔発明の実施例〕[Embodiments of the invention]

第３図は１相の電圧極性を逆転させた場合のべりｌ・ル
図である。いまＵ相の電圧マａを逆極性にすると、これ
はＱ点と中性点Ｎの間の−Ｖａとなる。FIG. 3 is a slip-le diagram when the voltage polarity of one phase is reversed. If the U-phase voltage a is now reversed in polarity, it becomes -Va between the Q point and the neutral point N.

のベクトル和がＲ点と中性点Ｎとの間に現れる零相過電
圧であって、（２）式で示される。The vector sum of is the zero-sequence overvoltage that appears between point R and neutral point N, and is expressed by equation (2).

あ客らかなように、１００チ地絡時に発生する零相過′
４Ｌ圧に対して６６％まで点検範囲を拡大できるから、
継電Ｘ＝のタップ値の範囲１５ＬＩ）〜４５係は余裕を
もってカバーすることができる。As you may know, the zero-phase excess that occurs when a 100-pin ground fault occurs.
Because the inspection range can be expanded to 66% for 4L pressure,
The range of tap values of relay X=15LI) to 45 can be covered with ample margin.

上述の原理（こもとづく点検電圧範囲の拡大と監視機能
について、以下に図面を参照して本発明の詳細な説明す
る。The present invention will be described in detail below with reference to the drawings regarding the above-mentioned principle (the expansion of the inspection voltage range and the monitoring function).

８ｒ！４図は本発明の第１の実施例を示す１１図示の地
絡噴出ｉ’、ｆ（ｊ電器は高抵抗接地系統の１線地絡事
故を検出するものである。Ｎは中性点端子であり、人力
ｙｊＮ　−Ｊ”　＋　■＊　Ｗには系統電圧が印加され
る。8r! Figure 4 shows the first embodiment of the present invention. Figure 11 shows the ground fault eruption i', f (j). The system voltage is applied to the human power yjN −J” + ■*W.

計器用変圧器１，２．３により系統電圧は適当なレベル
に変圧され、和電圧検出要素７〜９と零相過電圧検出要
素１０に入力される。和電圧検出要素７〜９はそれぞれ
Ｕ相さＶ相車圧ｃ７゛べ〃１ル和Ｖａ＋Ｖｂ、Ｖ相とＷ
和電圧のベクトル和Ｖｂ−１−Ｖｃ。The system voltage is transformed to an appropriate level by the instrument transformers 1, 2.3, and inputted to the sum voltage detection elements 7 to 9 and the zero-sequence overvoltage detection element 10. The sum voltage detection elements 7 to 9 are U-phase, V-phase, and vehicle pressure c7, V1, sum Va+Vb, V-phase, and W, respectively.
Vector sum of sum voltages Vb-1-Vc.

Ｗ相とＵ　柑′ｉ！ｆ圧のベクトル和Ｖｃ　十Ｖａを注
出する。W phase and U Kan'i! Pour out the vector sum of f pressures Vc 10 Va.

１０は零相過電圧検出要紫で系統の手相電圧（Ｖａ＋Ｖ
ｂ＋Ｖｃ）の過電圧を検出する。１２〜１４はそれぞれ
和電圧検出要素７〜９の出力リレー、１５は零相過電圧
検出要素１　ｉ）の出力リレーである。10 indicates the system's palm voltage (Va+V
b+Vc) overvoltage is detected. 12 to 14 are output relays of the sum voltage detection elements 7 to 9, respectively, and 15 is an output relay of the zero-phase overvoltage detection element 1i).

端子１１〜１２間の回路は遮断器トリップ回路の一部で
、前記出力リレー１２〜Ｊ５の常時開なる各接点１７〜
２０が直列接続されている。The circuit between terminals 11 and 12 is part of the circuit breaker trip circuit, and the normally open contacts 17 to 12 of the output relays 12 to J5 are connected to each other.
20 are connected in series.

本発明に従い、第２の零相過電圧検出要素１１が使用さ
れる。この検出要素１１は計器用変圧器４゜５．６を介
して系統の零相電圧を監睨し、零相過電圧検出時に出力
リレー１６を作動して）・リップ回路に前記接点１７〜
２０とともに直列挿入された出力リレー１６の常時開接
点２１を閉路する。According to the invention, a second zero-sequence overvoltage detection element 11 is used. This detection element 11 monitors the zero-sequence voltage of the system via the instrument transformer 4°5.6, and activates the output relay 16 when zero-sequence overvoltage is detected.
The normally open contact 21 of the output relay 16 inserted in series with 20 is closed.

当該継電器の基本機能であるトリップ回路の動作（既要
は次の通りである。正常時は端子Ｕ、Ｖ。The operation of the trip circuit, which is the basic function of the relay, is as follows. During normal operation, terminals U and V are connected.

Ｗに平偶丁３相電圧が印加されるため、和電圧検出要素
７〜９は出力し、出力リレー１２〜１４は動作し２、そ
の川点１７〜１９は閉路している。一方零相′ｒｌイ圧
はないから零相過電圧検出要素１０．１１は出力なしで
、出力ＩＪ　ｌ／　−１５と１６は不動作、その接点２
０と２１は開である。ここで１線地絡事故が発生ずると
、オ［１ｔｉｔ圧検出要素７〜９は出力したままで、零
相過電圧要素１．０と１１が出力し、出力ＩＪＩ／−１
５と１６が動作しその接点２０と２１が開路し、１ｔｆ
列接続されたすべての接点１７〜２Ｊが閉じるた、（′
）、［・リップ信号が発生し、遮断器は［・リップされ
る。す４ｆわち１線地絡事故のときのみ全ての検出要素
７〜１１が出力するよう構成さイしている。Since a three-phase voltage is applied to W, the sum voltage detection elements 7 to 9 output, the output relays 12 to 14 operate 2, and the points 17 to 19 thereof are closed. On the other hand, since there is no zero-phase overvoltage detection element 10.11, there is no output, outputs IJ l/-15 and 16 are inoperable, and their contact 2
0 and 21 are open. If a one-wire ground fault occurs here, O[1tit pressure detection elements 7 to 9 will remain output, zero-sequence overvoltage elements 1.0 and 11 will output, and the output IJI/-1
5 and 16 operate, their contacts 20 and 21 open, and 1tf
Since all the contacts 17 to 2J connected in the row are closed, ('
), [・lip signal is generated and the circuit breaker is [・lipped]. 4F, that is, all the detection elements 7 to 11 are configured to output only in the case of a one-line ground fault.

本冗明に従い、監視手段が付加される。第４図の実施例
（こおいて、２２〜２４は和電圧検出要素７〜９の出力
リレー１２〜１４の第２の常時開接点で、０）七光子と
ＮＡＮＤ素子とＡ、　Ｎ　Ｄ素子とでなる論理回路５０
により、これらの接点の状態の排他的論理和がとられる
。この排他的論理和回１１８５０の出力は出力１）１．
−−５１を作動する。端子Ｍ１〜Ｍ２間は監視回路の一
部で、上記出力リレー５１の常時開接点５２が挿入され
ている。したがって和電圧検出要素７〜９が共ｌこ動作
または不動作のときは正常とみなし、排他的論理和回路
５０からの出力は発生させないが、それ以外のとき、す
なわち検出要素７〜９間の状態が一致しない場合は和電
圧検出要素７〜９の動作不良とみなし、論理回路５０よ
り出力を発生させ、出力リレー５１を作動して接点５２
を閉にし監視出力を発生させるようにしている。同様に
零相過電圧検出要素１０゜１１間の状態が一致しない場
合も動作不良とみなし、監視出力を発生させるようにし
ている。すなわち、２５と２６は零相過電圧検出要素１
０と１１の各出力リレー１５と１６の第２の常時開接点
であるが、この２個の接点の状態の排他的論理和を排他
的論理和集子６０でとり、この論理素子６０の出力発生
時、出力リレー６１を作動し、」−述の排他的論理和回
路出力リレー接点５２と並列に接続された・１．１亥リ
レー６１の接点６２を閉路させる。According to this redundancy, monitoring means are added. The embodiment of FIG. 4 (here, 22 to 24 are the second normally open contacts of the output relays 12 to 14 of the sum voltage detection elements 7 to 9, and 0) seven photons, NAND elements, and A, N D elements. A logic circuit 50 consisting of
The exclusive OR of the states of these contacts is taken. The output of this exclusive OR circuit 11850 is output 1)1.
--Activate 51. A normally open contact 52 of the output relay 51 is inserted between the terminals M1 and M2, which is part of a monitoring circuit. Therefore, when the sum voltage detection elements 7 to 9 are both in operation or non-operation, it is considered normal and no output is generated from the exclusive OR circuit 50, but at other times, that is, between the detection elements 7 to 9 If the states do not match, it is assumed that the sum voltage detection elements 7 to 9 are malfunctioning, the logic circuit 50 generates an output, the output relay 51 is activated, and the contact 52
is closed to generate a monitoring output. Similarly, if the states of the zero-phase overvoltage detection elements 10 and 11 do not match, it is regarded as a malfunction and a monitoring output is generated. That is, 25 and 26 are the zero-sequence overvoltage detection element 1
This is the second normally open contact of each output relay 15 and 16 of 0 and 11, and the exclusive OR of the states of these two contacts is taken by an exclusive OR collector 60, and the output of this logic element 60 is When this happens, the output relay 61 is activated to close the contact 62 of the 1.1 relay 61 connected in parallel with the exclusive OR circuit output relay contact 52 mentioned above.

本発明（こ従い、さらに点検機能が継電器に付加される
。、２７，２８．２９で示す常時閉なるリレ−１琴点は
和′石圧検出・隻素７〜９用の点検接点で、点検時に開
路して継電器入力を３相とも零にする。According to the present invention, an inspection function is further added to the relay.The normally closed relay 1 koto point shown at 27, 28, and 29 is an inspection contact for the stone pressure detection/sensor elements 7 to 9, During inspection, open the circuit and reduce the relay input to zero for all three phases.

これに、にり、３つの和電圧要素７〜０が不Ｉ助咋とな
り、出力リレー１２〜１４が復帰して接点１７〜ｊ９が
ｊ：旧名することを確認する。As a result, the three sum voltage elements 7 to 0 are turned off, the output relays 12 to 14 are restored, and the contacts 17 to j9 are confirmed to be j: old name.

継ｉ１（ｋ’ｒ人／７のＩＪ相とＮｏ）間（こ挿入され
たリレ−１＆点３１　ｊｉ・ａｌの零相過電圧検出要素
１０を点検するための点倹接’ｔａ、■１４］とＮのＩ
ＪＩに挿入さｄまたリレー川魚；３３は第２の零細過電
圧検出゛〃素］Ｊを点ノ、がすイ）ための点検接点であ
って、点検時にはこのりｌ／−］）ン点点：１まプこは
３３の市り１・目（こよりそれそイ′１．の４相ｉ１４
　”＋Ｊ’−圧検出便素］０または１１１こ印加される
電ＨＦ、θ）うちの１相電圧の極性が逆転するので零１
４Ｊ　ｉｈ’４　直圧検１）［２］　ＯＩ’、＝ハ１１
　カｍＶＦ　ｔ、、出力’ｌ　１／　−ｌｆｆ点２０ま
たは２１が開路することを確認する。ただし２これら点
検接点３１と３３は同時１こｌ１１７１作はさせない。Between relay i1 (IJ phase of k'r/7 and No) (point connection for checking the zero-sequence overvoltage detection element 10 of relay 1 & point 31 ji・al inserted here, ■14) and N's I
33 is the inspection contact for the second zero overvoltage detection element J, which is inserted into the JI, and the contact point 33 is the inspection contact for the second zero overvoltage detection element J. :1 Mapuko is 33 markets 1/eye (Koyori Sore Soi'1.'s 4 phase i14
"+J'-pressure detection function] 0 or 111 The applied voltage HF, θ) is 0 or 1 because the polarity of one phase voltage is reversed.
4J ih'4 Direct pressure test 1) [2] OI',=ha11
Confirm that the output 'l 1/-lff point 20 or 21 is open. However, these check contacts 31 and 33 should not be operated at the same time.

このように点検接点３１と３３を同時に動作させないよ
うにすれば、動作点検時に５ける遮断器トリップ回路を
ロックする必要はなくなる。By preventing the inspection contacts 31 and 33 from operating at the same time in this manner, there is no need to lock the circuit breaker trip circuit 5 during operation inspection.

点検接点３０．３２および３４はそイ〕ぞれ北述せる点
検用接点２７〜２９．３１および３３１こ連動して動作
を４−る常時閉なる接点であっ−Ｃ１点検時ｊこ監視出
力が出ないように監視回路に１α列に挿入されでおり点
検接点３０は和電圧検出要素７〜９の点検時に、点検接
点３２は第１の零相過電圧検出要素１０の点検時に、点
検接点３４は第２の零相過′と圧検出要素１１の点検時
に開路する。各点検１炙点の動作順序は適当なシーケン
ス、ｔＪ路を使用することにより設定できる。Inspection contacts 30, 32 and 34 are normally closed contacts that operate in conjunction with inspection contacts 27 to 29, 31 and 331, respectively. The inspection contact 30 is inserted in the 1α row in the monitoring circuit to prevent the voltage from rising, and the inspection contact 32 is inserted when inspecting the sum voltage detection elements 7 to 9, the inspection contact 32 is inserted when the first zero-sequence overvoltage detection element 10 is inspected, and the inspection contact 34 is When the second zero-phase overflow' and pressure detection element 11 are inspected, the circuit is opened. The operating order of each inspection point can be set by using an appropriate sequence, tJ path.

第５ツｊは本発明の第２の実施例をボす。第４図と異な
る点は模擬入力を受けとる変圧器３５〜３７と系統切換
接点３８〜４１を付加するこ吉により、系統停電時でも
点検、監視が行なえるようにした点である。系統が復電
したら、切換接点３８〜４１は電圧リレー（図示せず）
等を介して自動的に系統側に復帰させる。The fifth part j covers the second embodiment of the present invention. The difference from FIG. 4 is that transformers 35 to 37 that receive simulated inputs and system switching contacts 38 to 41 are added so that inspection and monitoring can be performed even during a system power outage. When the grid is restored, switching contacts 38 to 41 are connected to voltage relays (not shown).
etc., to automatically return to the grid side.

第６図は本発明の第３の実施例を示す。第４図と異なる
点は第２の零相過電圧検出要素１１を省略し、継電器外
部の別の零相過電圧検出要素の接点４２をトリップ回路
に直列に挿入したことである。零相過電圧検出要素１１
の省略に伴ない、過′ｒル圧検出要素の検出出力同士の
不一致を、凋べる排他的論理和素子６０とその出力リレ
ー６１も省略される。外部の零相過電圧要素として電磁
形リレーのように点検不要のものを採用するこ吉により
回路の単純化が図れる。FIG. 6 shows a third embodiment of the invention. The difference from FIG. 4 is that the second zero-phase overvoltage detection element 11 is omitted, and a contact 42 of another zero-phase overvoltage detection element outside the relay is inserted in series with the trip circuit. Zero-phase overvoltage detection element 11
Along with the omission, the exclusive OR element 60 and its output relay 61, which can resolve discrepancies between the detection outputs of the overpressure detection elements, are also omitted. The circuit can be simplified by using an external zero-sequence overvoltage element that does not require inspection, such as an electromagnetic relay.

第７図は第６図の変形例であり、第６図の構成に第５図
に示ずごとき系統切換接点（系統切換接点３８〜４１、
模擬入力供給変圧器３５〜３７）を付加したものである
。FIG. 7 is a modification of FIG. 6, in which system switching contacts (system switching contacts 38 to 41,
Simulated input supply transformers 35 to 37) are added.

上述の実施例１に８いて、これらの点検接点２７〜２９
，３１．３３や系統切換接点３８〜４１が接触不良の場
合には、これら接点に対応する検出要素が応動するので
、これらの接点の接触不良も点検できる特徴を有する。8 in Example 1 above, these check contacts 27 to 29
, 31, 33 or the system switching contacts 38 to 41 have poor contact, the detection elements corresponding to these contacts respond, so that it is possible to check for poor contact at these contacts as well.

〔発明の効果〕〔Effect of the invention〕

本発明によれば和電圧検出要素の出力相互間ならびに零
相過電圧検出要素の出力相互間の不−改を監視手段によ
り常時監視しているので、これら検出要素の動作不良を
直ちに発見できる。According to the present invention, since the monitoring means constantly monitors whether the outputs of the sum voltage detection elements and the outputs of the zero-sequence overvoltage detection elements are unchanged, malfunctions of these detection elements can be detected immediately.

かえる方式であるからリレー接点の簡単な回路で構成で
きるし、その零相過電圧の点検範囲は完全地絡時の６６
％電圧まであるので、通常の継電器タップ値（１５％〜
４５％）は完全にカバーすることができる。さらに零相
過電圧検出要素を２個使用し、その出力リレー接点を遮
断器トリップ回路に直列に挿入しているので、動作点検
時に遮断器のトリップ回路をロックする必要がなく、ま
た監訳出力が出ないようインクロックもほどこされる。Since it is a switching system, it can be configured with a simple circuit of relay contacts, and the inspection range for zero-sequence overvoltage is 66% at the time of a complete ground fault.
% voltage, so the normal relay tap value (15% ~
45%) can be completely covered. Additionally, two zero-sequence overvoltage detection elements are used, and their output relay contacts are inserted in series with the circuit breaker trip circuit, so there is no need to lock the circuit breaker trip circuit during operation inspection, and a supervisory translation output is also available. An ink lock will also be applied to prevent this.

また継電器の動作点検や監視のための接点の接触不良も
あわせて検出することができる。It is also possible to detect contact failures for relay operation inspection and monitoring.

よって当該１線地絡検出継電器の故障を早期に発見でき
るとともに点検試験が省力化され、保守運用向で大きな
効果が期待できる。Therefore, failures in the one-wire ground fault detection relay can be detected early, and inspection tests can be labor-saving, which can be expected to have a great effect on maintenance operations.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は１相完全地絡時のベクトル図であり、第２図は
１相電圧零時のベクトル図、第３図は１相電圧逆転時の
ベクトル図である。 第４図は本発明による監視・点検椋：能付き１線地絡検
出ｎ、電器の実施例を示す回路図、第５１図は本発明の
第２の実施例を示す回路図、第６図は同じく本発明の第
３の実施例を示す回路図であり、第７図は＠６図に示す
第３の実施例の変形例を示す回路図である。 １〜６：計器用変圧器 ７〜９：和電圧検出要素 １０　、　］　１　：零相過電圧検出要素１２〜１４：
和電圧検出要素出力リレー１５．１６：零相過電圧検出
要素出力リレー１７〜１９　：　トＩＪツブ用和電圧検
出要素出力リレー接点 ２０　、２１　：　）　ＩＪツブ用零相過電圧検出璧素
出力２５．２６：監視用零相過電圧検出要素出力リレー
接点 ２７〜３０：和電圧検出要素用点検接点３１．３２：零
相過′醒圧検出袈素ｌＯ用点瑛接点３３．３４：零相過
電圧検出要素ｌｌ用点検接点３５〜３７：模擬入力供給
変圧器 ３８〜４１：系統切換接点 ４２：継電器外部の零相過電圧検出要素出力接点５０：
排他的論理和回路 ５１　：　ｈＪＰ！’ｔ”Ｕ的論理和回路出力リレー５
２　：　：ｌ：Ｊｌ：測的論理和回路出力リレー接点６
０：排１也的論理和素子 ６１：排他的論理和素子出力リレー ６２：排他的論ＪＷｘロ素子出力リレー接点。 口利 ビ 第　　ｉ　　図 Ｕ４目 に 第　　３　　図 第　　２　　図FIG. 1 is a vector diagram when one phase is completely grounded, FIG. 2 is a vector diagram when one phase voltage is zero, and FIG. 3 is a vector diagram when one phase voltage is reversed. Fig. 4 is a circuit diagram showing an embodiment of the monitoring/inspection plate according to the present invention: one-wire ground fault detection with function, electrical appliance, Fig. 51 is a circuit diagram showing a second embodiment of the present invention, and Fig. 6 7 is a circuit diagram showing a third embodiment of the present invention, and FIG. 7 is a circuit diagram showing a modification of the third embodiment shown in FIG. 1 to 6: Instrument transformers 7 to 9: Sum voltage detection element 10, ] 1: Zero-sequence overvoltage detection element 12 to 14:
Sum voltage detection element output relay 15.16: Zero-phase overvoltage detection element output relay 17-19: Sum voltage detection element output relay contact 20, 21 for IJ tube:) Zero-phase overvoltage detection element output for IJ tube 25.26 : Monitoring zero-phase overvoltage detection element output relay contacts 27 to 30: Inspection contacts for sum voltage detection element 31.32: Zero-phase overvoltage detection element IO contact 33.34: Zero-phase overvoltage detection element ll Inspection contacts 35 to 37: Simulated input supply transformers 38 to 41: System switching contacts 42: Zero-phase overvoltage detection element output contacts outside the relay 50:
Exclusive OR circuit 51: hJP! 't'U-like OR circuit output relay 5
2: :l:Jl: Metric OR circuit output relay contact 6
0: exclusive OR element 61: exclusive OR element output relay 62: exclusive OR JWx element output relay contact. Figure U4 Figure 3 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 系統の各２相の和電圧を検出する和電圧検出要素吉、系
統の零相過電圧を検出する第１の零相過電圧検出要素と
、前記各検出要素の動作時に閉路するＫ　ＩＪリレー接
点直列に接続された遮断器トリップ回路を備えた１線地
絡検出継電器において、系統の零相過電圧を検出し、動
作時に閉路するリレー接点が１）ＩＪ記遮断器トリップ
回路に直列に挿入された第２の零相過電圧検出要素と、
前記各和石用検出安奏の出力の排他的論理和または前記
第１゜第２の沓相過１尤圧検出要素の排他的論理和を条
件として監ヱＲ１ｆｊ力をｌｆ」す監視回路と、前記和
電圧検出ｌ政素の入力端の各相に挿入され、点検時に開
路さイ１．る和＋Ｉｆ圧検出要素用点検接点と、前記第
１の零相過電圧検出要素の入力側の一相に挿入され、点
検時に当該用の電圧極性を逆転させる零相過電王検出安
素用点検手段と、点検時に前記監視手段をロックするロ
ック手段とを備えたことを特徴とする監視・点検機能付
き１線地絡検出継電と÷。A sum voltage detection element that detects the sum voltage of each two phases of the grid, a first zero-sequence overvoltage detection element that detects the zero-sequence overvoltage of the grid, and a K IJ relay contact that is connected in series to close when each of the detection elements is operated. In a one-wire ground fault detection relay with a connected circuit breaker trip circuit, a relay contact that detects a zero-sequence overvoltage in the system and closes when activated is 1) a second contact inserted in series with the circuit breaker trip circuit; a zero-sequence overvoltage detection element,
a monitoring circuit that monitors the R1fj force on the condition of the exclusive OR of the outputs of the respective Japanese stones or the exclusive OR of the first and second phase overload detection elements; , are inserted into each phase of the input terminal of the sum voltage detection l element, and are opened during inspection. a check contact for the sum+If pressure detection element; and a zero-phase overvoltage detecting inspection means that is inserted into one phase of the input side of the first zero-phase overvoltage detecting element and reverses the voltage polarity for the voltage during inspection. and a locking means for locking the monitoring means at the time of inspection.