JP2010078347A - Current detector for breaker - Google Patents

Current detector for breaker Download PDF

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JP2010078347A
JP2010078347A JP2008244067A JP2008244067A JP2010078347A JP 2010078347 A JP2010078347 A JP 2010078347A JP 2008244067 A JP2008244067 A JP 2008244067A JP 2008244067 A JP2008244067 A JP 2008244067A JP 2010078347 A JP2010078347 A JP 2010078347A
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magnetic core
holder
current detector
hall element
cover
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JP5150432B2 (en
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Koji Konishi
功次 小西
Takashi Yamato
敬史 大和
Toshiyuki Nakagawa
敏幸 中川
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Kawamura Electric Inc
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Kawamura Electric Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To accurately detect a line current by fixing the correlation position among a line conductor of a breaker, a magnetic core, and a magnetoelectric transducer and stabilizing output from the magnetoelectric transducer. <P>SOLUTION: A current detector 21 includes: a U-shaped magnetic core 26 surrounding a folding part 31 of a terminal bar 22; a Hall element substrate 27 on which a Hall element for detecting a magnetic flux density of a space 36 of the magnetic core 26 is mounted; a holder 28 for holding the Hall element substrate 27 at the specific relative position to the magnetic core 26; a cover 29 covering a base 39 of the magnetic core 26; and a screw 30 for fastening the holder 28 and the cover 29 to the terminal bar 22. A leg 34 of the magnetic core 26 is inserted into an engaging groove 35 of the holder 28. The Hall element substrate 27 is attached to a fixing part 37 of the holder 28, and the Hall element is fixed in the space 36 of the magnetic core 26. The cover 29 is provided with a holding part 41, and the Hall element substrate 27 is held between the holding part 41 and the fixing part 37. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ブレーカの線路導体に流れる電流を検出する電流検出器に関する。   The present invention relates to a current detector that detects a current flowing in a line conductor of a breaker.

ブレーカの電流検出器として、従来、変流器（ＣＴ）が広く使用されている。例えば、図１１に示す変流器５１は、ケース５２にコイルを巻いた磁気コアが収められ、貫通孔５３に線路導体５４が挿通される。また、従来、磁電変換素子を用いた電流検出器も知られている。例えば、特許文献１には、図１２に示すように、線路導体６２を取り囲む磁気コア６３の一部に空隙部６４を形成し、空隙部６４にホール素子６５を挿入した電流検出器６１が記載されている。
特開２００４−２０４６０号公報 Conventionally, a current transformer (CT) has been widely used as a current detector for a breaker. For example, in the current transformer 51 shown in FIG. 11, a magnetic core with a coil wound around a case 52 is housed, and a line conductor 54 is inserted into the through hole 53. Conventionally, a current detector using a magnetoelectric conversion element is also known. For example, Patent Document 1 describes a current detector 61 in which a gap 64 is formed in a part of a magnetic core 63 surrounding a line conductor 62 and a Hall element 65 is inserted in the gap 64 as shown in FIG. Has been.
JP 2004-20460 A

ところが、変流器５１は、線路導体５４の周囲に大きな設置スペースを必要とするため、ブレーカのケーシングが大形化する問題点があった。これに対し、ホール素子６５等の磁電変換素子を用いた電流検出器６１は、磁気コア６３にコイルを巻く必要がないため、全体を比較的小型に構成できる。しかし、磁電変換素子は、磁気コア６３や線路導体６２に対する位置が少しでも変わると、出力が大きく変動するため、線路電流の検出精度を安定させることが困難であった。   However, since the current transformer 51 requires a large installation space around the line conductor 54, there is a problem that the casing of the breaker is enlarged. On the other hand, the current detector 61 using a magnetoelectric conversion element such as the Hall element 65 does not require a coil to be wound around the magnetic core 63, so that the whole can be made relatively small. However, if the position of the magnetoelectric transducer with respect to the magnetic core 63 or the line conductor 62 changes even slightly, the output greatly fluctuates, and it is difficult to stabilize the detection accuracy of the line current.

そこで、本発明の目的は、小型の構成で線路電流を高精度に検出できる電流検出器を提供することにある。   Accordingly, an object of the present invention is to provide a current detector that can detect a line current with high accuracy in a small configuration.

上記課題を解決するために、本発明は、ブレーカの線路導体に流れる電流を検出する電流検出器において、次のような特徴的手段を提供する。
（１）線路導体を取り囲む磁気コアと、磁気コアの空隙部に発生した磁束の密度を検出する磁電変換素子と、磁気コアおよび磁電変換素子を一定の相関位置に保持するホルダと、ホルダを線路導体に組み付ける組付手段とを備えたことを特徴とする電流検出器。 In order to solve the above problems, the present invention provides the following characteristic means in a current detector for detecting a current flowing in a line conductor of a breaker.
(1) A magnetic core that surrounds the line conductor, a magnetoelectric conversion element that detects the density of magnetic flux generated in the gap of the magnetic core, a holder that holds the magnetic core and the magnetoelectric conversion element at a fixed correlation position, and a holder for the line An electric current detector comprising an assembling means for assembling the conductor.

（２）磁気コアをＵ字形またはＣ字形に形成し、ホルダに磁気コアの脚部を係止する係止部と、磁電変換素子を磁気コアの空隙部に定置する定置部とを設けたことを特徴とする電流検出器。 (2) The magnetic core is formed in a U-shape or C-shape, and a locking portion for locking the leg portion of the magnetic core to the holder and a stationary portion for placing the magnetoelectric conversion element in the gap portion of the magnetic core are provided. A current detector.

（３）磁気コアの基部を覆うカバーを備え、カバーに挟持部を形成し、挟持部と定置部との間に磁電変換素子を挟持したことを特徴とする電流検出器。 (3) A current detector comprising a cover for covering a base portion of a magnetic core, a sandwiching portion is formed in the cover, and a magnetoelectric conversion element is sandwiched between the sandwiching portion and the stationary portion.

（４）組付手段がネジを含み、ネジでホルダとカバーを線路導体に共締めしたことを特徴とする電流検出器。 (4) A current detector, wherein the assembly means includes a screw, and the holder and the cover are fastened to the line conductor with the screw.

本発明の電流検出器によれば、磁気コアと磁電変換素子の相関位置をホルダで固定し、ホルダを線路導体に組み付けたので、磁気コアおよび線路導体に対し磁電変換素子を定位置に保持し、磁電変換素子の出力を安定させ、線路電流を高精度に検出できるという効果がある。特に、磁気コアをＵ字形またはＣ字形に形成することで、電流検出器の設置スペースを縮小し、ブレーカの小型化を促進できるという効果がある。   According to the current detector of the present invention, since the correlation position between the magnetic core and the magnetoelectric conversion element is fixed by the holder and the holder is assembled to the line conductor, the magnetoelectric conversion element is held at a fixed position with respect to the magnetic core and the line conductor. There is an effect that the output of the magnetoelectric conversion element is stabilized and the line current can be detected with high accuracy. In particular, by forming the magnetic core in a U shape or C shape, there is an effect that the installation space of the current detector can be reduced and the breaker can be reduced in size.

以下、本発明の実施形態を図面に基づいて説明する。図１は単相３線式電路用ブレーカの外観を示し、図２は内部機構を示し、図３は電気回路を示す。図４はブレーカ内部における電流検出器の設置形態を示し、図５は電流検出器を線路導体に組み付けた形態を示し、図６は電流検出器の各部を分解して示す。図７，図８は磁気コアとホール素子の相関位置を示し、図９，図１０はホルダとカバーの組み合わせを示す。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the appearance of a single-phase three-wire circuit breaker, FIG. 2 shows an internal mechanism, and FIG. 3 shows an electric circuit. 4 shows an installation form of the current detector inside the breaker, FIG. 5 shows an embodiment in which the current detector is assembled to the line conductor, and FIG. 6 shows each part of the current detector in an exploded manner. 7 and 8 show the correlation positions of the magnetic core and the Hall element, and FIGS. 9 and 10 show combinations of the holder and the cover.

図１に示すように、この実施例のブレーカ１は、ケーシング２が協約形ブレーカの規定寸法に合わせて形成されている。ケーシング２の上端部には３つの電源側端子３が配設され、下端部に３つの負荷側端子４が配設されている。ケーシング２の前面には、単相３線式電路を手動で開閉するハンドル５と、ブレーカ１の動作状態を表示する表示部６と、表示や動作モードを切り替える手元スイッチ７と、外部操作機器に接続されるＬＡＮ配線接続口８とが設けられている。   As shown in FIG. 1, in the breaker 1 of this embodiment, the casing 2 is formed in accordance with the prescribed dimensions of the agreement type breaker. Three power-side terminals 3 are disposed at the upper end of the casing 2, and three load-side terminals 4 are disposed at the lower end. On the front surface of the casing 2, a handle 5 for manually opening and closing a single-phase three-wire electric circuit, a display unit 6 for displaying the operation state of the breaker 1, a hand switch 7 for switching display and operation modes, and an external operation device A LAN wiring connection port 8 to be connected is provided.

図２に示すように、ケーシング２の内部には、電路に流れた過電流を遮断するトリップコイル９と、短絡電流を瞬時に遮断する瞬時遮断機構１０と、ブレーカ１の主接点１１（図３参照）を開閉する開閉機構１２とが設置されている。トリップコイル９はハンドル５の側方に配置され、瞬時遮断機構１０が表示基板１３の下側に配置され、双方の動力が開閉機構１２を介して主接点１１に伝達される。ケーシング２の背面には電子回路基板１４が設けられ、背面カバー（図示略）で覆われている。   As shown in FIG. 2, the casing 2 includes a trip coil 9 that interrupts an overcurrent flowing in the electric circuit, an instantaneous interruption mechanism 10 that instantaneously interrupts a short-circuit current, and a main contact 11 of the breaker 1 (FIG. 3). And an opening / closing mechanism 12 that opens and closes (see). The trip coil 9 is disposed on the side of the handle 5, the instantaneous interruption mechanism 10 is disposed below the display substrate 13, and both powers are transmitted to the main contact 11 via the opening / closing mechanism 12. An electronic circuit board 14 is provided on the back of the casing 2 and is covered with a back cover (not shown).

図３に示すように、電子回路基板１４には、ブレーカ１全体の動作を制御するＣＰＵ１５と、電流検出器２１の出力に基づいて電路２０に流れる電流を測定する電流測定部１６と、トリップコイル９を時限制御するトリップコイル制御部１７と、赤外線リモコンやパソコン等の外部操作機器との通信を制御する通信制御部１８とが設けられている。電流検出器２１は電路２０の二本の電圧線２０Ｘ，２０Ｙ上に設置され、Ｘ，Ｙ相の線路導体に流れる電流を検出し、検出信号を電流測定部１６に出力する。   As shown in FIG. 3, the electronic circuit board 14 includes a CPU 15 that controls the operation of the entire breaker 1, a current measurement unit 16 that measures a current flowing through the electric circuit 20 based on the output of the current detector 21, and a trip coil. 9 is provided with a trip coil control unit 17 that controls the time 9 and a communication control unit 18 that controls communication with an external operation device such as an infrared remote controller or a personal computer. The current detector 21 is installed on the two voltage lines 20 </ b> X and 20 </ b> Y of the electric circuit 20, detects a current flowing through the X and Y phase line conductors, and outputs a detection signal to the current measuring unit 16.

図４に示すように、Ｘ相の電流検出器２１ＸとＹ相の電流検出器２１Ｙはそれぞれ同様に構成され、線路導体の一部である左右の負荷側端子４の端子バー２２に組み付けられている。端子バー２２は金属板を折り曲げて形成され（図６参照）、端子ネジ２３により座金２４を介して端子バー２２に取り付けられている。なお、電流検出器２１は、負荷側端子バー２２に限定されず、電源側端子バー、または電源側と負荷側の中間部位など、Ｘ，Ｙ相の線路導体上の任意の箇所に設置できる。   As shown in FIG. 4, the X-phase current detector 21 </ b> X and the Y-phase current detector 21 </ b> Y are similarly configured and assembled to the terminal bars 22 of the left and right load side terminals 4 that are part of the line conductor. Yes. The terminal bar 22 is formed by bending a metal plate (see FIG. 6), and is attached to the terminal bar 22 via a washer 24 with a terminal screw 23. The current detector 21 is not limited to the load-side terminal bar 22 and can be installed at any location on the X and Y-phase line conductors, such as the power-side terminal bar or an intermediate portion between the power-side and the load side.

図５、図６に示すように、電流検出器２１は磁気コア２６、ホール素子基板２７、ホルダ２８、カバー２９およびネジ３０から構成されている。図７、図８に示すように、磁気コア２６は、パーマロイ（電磁軟鉄）やＭｎ−Ｚｎ系フェライト等の磁性材により、端子バー２２の折曲部３１を取り囲むＵ字形に形成されている。ホール素子基板２７には、磁気コア２６の空隙部３６に発生した磁束の密度を検出するホール素子３２と、ホール素子３２を電子回路基板１４に接続するリード線３３とが設けられている。   As shown in FIGS. 5 and 6, the current detector 21 includes a magnetic core 26, a Hall element substrate 27, a holder 28, a cover 29, and screws 30. As shown in FIGS. 7 and 8, the magnetic core 26 is formed in a U shape surrounding the bent portion 31 of the terminal bar 22 with a magnetic material such as permalloy (electromagnetic soft iron) or Mn—Zn ferrite. The hall element substrate 27 is provided with a hall element 32 that detects the density of magnetic flux generated in the gap portion 36 of the magnetic core 26 and a lead wire 33 that connects the hall element 32 to the electronic circuit board 14.

図９、図１０に示すように、ホルダ２８およびカバー２９は樹脂で成形されている。ホルダ２８は、一対の係止溝３５と定置部３７とを備え、係止溝３５に磁気コア２６の脚部３４を挿入し、定置部３７にホール素子基板２７を装着し、ホール素子３２が空隙部３６に定置されるように、磁気コア２６とホール素子基板２７とを一定の相関位置に保持している。カバー２９には、端子バー２２の折曲部３１に嵌合する位置決め溝３８と、磁気コア２６の基部３９を覆う被覆部４０と、ホール素子３２を定置部３７との間に挟持する挟持部４１とが形成されている。   As shown in FIGS. 9 and 10, the holder 28 and the cover 29 are molded of resin. The holder 28 includes a pair of locking grooves 35 and a stationary portion 37, and the leg portions 34 of the magnetic core 26 are inserted into the locking grooves 35, and the Hall element substrate 27 is attached to the stationary portion 37. The magnetic core 26 and the Hall element substrate 27 are held at a fixed correlation position so as to be placed in the gap 36. The cover 29 includes a positioning groove 38 that fits into the bent portion 31 of the terminal bar 22, a covering portion 40 that covers the base portion 39 of the magnetic core 26, and a holding portion that holds the Hall element 32 between the stationary portion 37. 41 is formed.

図６に示すように、ホルダ２８の定置部３７にはネジ挿通孔４２が設けられ、カバー２９の挟持部４１にボス４３とネジ通し孔４４とが形成されている。そして、磁気コア２６とホール素子基板２７をホルダ２８に装着し、ホルダ２８とカバー２９を組み合わせ、ネジ３０を挿通孔４２、通し孔４４、ボス４３に通して端子バー２２のネジ穴４５に締め付け、図５に示すように、ネジ３０でホルダ２８とカバー２９を端子バー２２に共締めするようになっている。   As shown in FIG. 6, a screw insertion hole 42 is provided in the stationary part 37 of the holder 28, and a boss 43 and a screw through hole 44 are formed in the clamping part 41 of the cover 29. Then, the magnetic core 26 and the Hall element substrate 27 are mounted on the holder 28, the holder 28 and the cover 29 are combined, and the screw 30 is passed through the insertion hole 42, the through hole 44, and the boss 43, and tightened into the screw hole 45 of the terminal bar 22. As shown in FIG. 5, the holder 28 and the cover 29 are fastened to the terminal bar 22 with screws 30.

上記構成の電流検出器２１によれば、次のような作用効果が得られる。
（ａ）ブレーカ１の線路電流をホール素子３２で検出するので、変流器（ＣＴ）と比較し、電流検出器２１を小型に構成し、ケーシング２内にコンパクトに設置できる。
（ｂ）特に、磁気コア２６をＵ字形に形成したので、電流検出器２１が端子バー２２の周辺に占めるスペースを縮小し、ケーシング２の小型化を促進できる。 According to the current detector 21 configured as described above, the following operational effects can be obtained.
(A) Since the line current of the breaker 1 is detected by the Hall element 32, the current detector 21 can be configured in a small size and can be installed in the casing 2 in a compact manner as compared with the current transformer (CT).
(B) In particular, since the magnetic core 26 is formed in a U shape, the space occupied by the current detector 21 around the terminal bar 22 can be reduced, and the downsizing of the casing 2 can be promoted.

（ｃ）ホール素子３２を基板２７に実装し、ホール素子基板２７と磁気コア２６をホルダ２８で一定の相関位置に保持したので、ホール素子３２の出力を安定させ、線路電流を高精度に検出できる。
（ｄ）また、ホルダ２８を端子バー２２に組み付けたので、端子バー２２に対する磁気コア２６とホール素子３２の相関位置を固定し、線路電流をより高精度に検出できる。 (C) Since the Hall element 32 is mounted on the substrate 27 and the Hall element substrate 27 and the magnetic core 26 are held at a fixed correlation position by the holder 28, the output of the Hall element 32 is stabilized and the line current is detected with high accuracy. it can.
(D) Since the holder 28 is assembled to the terminal bar 22, the correlation position of the magnetic core 26 and the Hall element 32 with respect to the terminal bar 22 is fixed, and the line current can be detected with higher accuracy.

（ｅ）磁気コア２６の脚部３４を樹脂製のホルダ２８の係止溝３５に挿入し、磁気コア２６の露出部である基部３９を樹脂製のカバー２９で被覆したので、外部磁気による影響を少なくし、ホール素子３２の電流検出精度を高めることができる。
（ｆ）ホール素子基板２７をホルダ２８の定置部３７とカバー２９の挟持部４１とで挟み付けたので、磁気コア２６の空隙部３６にホール素子３２を確実に定置し、電流検出精度を長期間安定させることができる。
（ｇ）ホルダ２８とカバー２９をネジ３０で端子バー２２に共締めしたので、電流検出器２１の複数の部品を端子バー２２に容易に一体化でき、このアセンブリーをブレーカ１のケーシング２に簡単に装着できる。 (E) The leg portion 34 of the magnetic core 26 is inserted into the locking groove 35 of the resin holder 28, and the base portion 39, which is the exposed portion of the magnetic core 26, is covered with the resin cover 29. The current detection accuracy of the Hall element 32 can be increased.
(F) Since the Hall element substrate 27 is sandwiched between the stationary portion 37 of the holder 28 and the sandwiching portion 41 of the cover 29, the Hall element 32 is securely placed in the gap portion 36 of the magnetic core 26 and the current detection accuracy is increased. The period can be stabilized.
(G) Since the holder 28 and the cover 29 are fastened together with the terminal bar 22 with screws 30, a plurality of parts of the current detector 21 can be easily integrated with the terminal bar 22, and this assembly can be easily integrated into the casing 2 of the breaker 1. Can be attached to.

なお、本発明の電流検出器は、単相３線式電路用のブレーカに限定されず、例えば、単相２線式電路、３相３線式電路等に配備されるブレーカにも適用でき、主幹ブレーカ、分岐ブレーカ、電流制限器等の各種回路遮断器に適用することも可能である。また、磁電変換素子としては、ホール素子に限定されず、磁気抵抗素子等も使用できる。その他、磁気コア２６をＣ字形に形成するなど、本発明の趣旨を逸脱しない範囲で、電流検出器各部の構成や形状を任意に変更して実施することも可能である。   The current detector of the present invention is not limited to a breaker for a single-phase three-wire circuit, and can be applied to, for example, a breaker provided in a single-phase two-wire circuit, a three-phase three-wire circuit, It can also be applied to various circuit breakers such as a main breaker, a branch breaker, and a current limiter. Further, the magnetoelectric conversion element is not limited to the Hall element, and a magnetoresistive element or the like can also be used. In addition, the configuration and shape of each part of the current detector can be arbitrarily changed without departing from the spirit of the present invention, such as forming the magnetic core 26 in a C shape.

本発明の一実施例を示すブレーカの正面図である。It is a front view of the breaker which shows one Example of this invention. ブレーカの内部機構を示す斜視図である。It is a perspective view which shows the internal mechanism of a breaker. ブレーカの電気回路を示すブロック図である。It is a block diagram which shows the electric circuit of a breaker. 電流検出器の設置形態を示す負荷側端子部分の正面図である。It is a front view of the load side terminal part which shows the installation form of an electric current detector. 電流検出器の全体を示す斜視図である。It is a perspective view which shows the whole electric current detector. 電流検出器を分解して示す斜視図である。It is a perspective view which decomposes | disassembles and shows an electric current detector. 磁気コアとホール素子の相関位置を示す正面図である。It is a front view which shows the correlation position of a magnetic core and a Hall element. 磁気コアとホール素子基板の相関位置を示す斜視図である。It is a perspective view which shows the correlation position of a magnetic core and a Hall element board | substrate. 図５の９−９線断面図である。FIG. 9 is a sectional view taken along line 9-9 in FIG. 5. 図５の１０−１０線断面図である。FIG. 10 is a sectional view taken along line 10-10 in FIG. 従来の電流検出器を示す斜視図である。It is a perspective view which shows the conventional current detector. 従来の別の電流検出器を示す正面図である。It is a front view which shows another conventional current detector.

符号の説明Explanation of symbols

１ ブレーカ
２１ 電流検出器
２２ 端子バー
２６ 磁気コア
２７ ホール素子基板
２８ ホルダ
２９ カバー
３０ ネジ
３２ ホール素子
３４ 脚部
３５ 係止溝
３６ 空隙部
３７ 定置部
３９ 基部
４０ 被覆部
４１ 挟持部 DESCRIPTION OF SYMBOLS 1 Breaker 21 Current detector 22 Terminal bar 26 Magnetic core 27 Hall element board 28 Holder 29 Cover 30 Screw 32 Hall element 34 Leg part 35 Locking groove 36 Cavity part 37 Stationary part 39 Base part 40 Covering part 41 Holding part

Claims (4)

ブレーカの線路導体に流れる電流を検出する電流検出器において、線路導体を取り囲む磁気コアと、磁気コアの空隙部に発生した磁束の密度を検出する磁電変換素子と、磁気コアおよび磁電変換素子を一定の相関位置に保持するホルダと、ホルダを線路導体に組み付ける組付手段とを備えたことを特徴とする電流検出器。   In the current detector that detects the current flowing through the line conductor of the breaker, the magnetic core that surrounds the line conductor, the magnetoelectric transducer that detects the density of the magnetic flux generated in the gap of the magnetic core, and the magnetic core and the magnetoelectric transducer are fixed A current detector comprising: a holder for holding at a correlation position; and an assembly means for assembling the holder to the line conductor. 前記磁気コアをＵ字形またはＣ字形に形成し、前記ホルダに磁気コアの一対の脚部を係止する係止部と、磁電変換素子を磁気コアの空隙部に定置する定置部とを設けた請求項１記載の電流検出器。   The magnetic core is formed in a U-shape or a C-shape, and a locking portion for locking a pair of legs of the magnetic core to the holder and a stationary portion for placing the magnetoelectric conversion element in a gap portion of the magnetic core are provided. The current detector according to claim 1. 前記磁気コアの基部を覆うカバーを備え、カバーに挟持部を形成し、挟持部と前記定置部との間に磁電変換素子を挟持した請求項２記載の電流検出器。   The current detector according to claim 2, further comprising a cover that covers a base portion of the magnetic core, a sandwiching portion formed in the cover, and a magnetoelectric conversion element sandwiched between the sandwiching portion and the stationary portion. 前記組付手段がネジを含み、ネジでホルダとカバーを線路導体に共締めした請求項３記載の電流検出器。   The current detector according to claim 3, wherein the assembly means includes a screw, and the holder and the cover are fastened to the line conductor with the screw.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013113687A (en) * 2011-11-28 2013-06-10 Toyota Industries Corp Current detector
JP2014026739A (en) * 2012-07-24 2014-02-06 Nitto Kogyo Co Ltd Power distribution apparatus
JP2014035322A (en) * 2012-08-10 2014-02-24 Tokai Rika Co Ltd Core holder and current sensor
JP2014235156A (en) * 2013-06-05 2014-12-15 株式会社豊田自動織機 Current detector
JP2015523847A (en) * 2012-07-09 2015-08-13 ソーラーボス、インク． Prevention of reverse current failure in solar panels

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0451666U (en) * 1990-09-05 1992-04-30
JPH0686080U (en) * 1993-05-21 1994-12-13 スタンレー電気株式会社 Current detector
JPH07280846A (en) * 1994-04-15 1995-10-27 Nippon Telegr & Teleph Corp <Ntt> Breaker with current measuring part

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0451666U (en) * 1990-09-05 1992-04-30
JPH0686080U (en) * 1993-05-21 1994-12-13 スタンレー電気株式会社 Current detector
JPH07280846A (en) * 1994-04-15 1995-10-27 Nippon Telegr & Teleph Corp <Ntt> Breaker with current measuring part

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013113687A (en) * 2011-11-28 2013-06-10 Toyota Industries Corp Current detector
JP2015523847A (en) * 2012-07-09 2015-08-13 ソーラーボス、インク． Prevention of reverse current failure in solar panels
JP2014026739A (en) * 2012-07-24 2014-02-06 Nitto Kogyo Co Ltd Power distribution apparatus
JP2014035322A (en) * 2012-08-10 2014-02-24 Tokai Rika Co Ltd Core holder and current sensor
JP2014235156A (en) * 2013-06-05 2014-12-15 株式会社豊田自動織機 Current detector

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