JP2015184003A - Testing coil of penetration type current transformer - Google Patents
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Abstract
Description
この発明は、変電所や一般需要家などの受変電設備に設けられた貫通型の変流器の試験を行う際に使用する試験用巻き線に関するものである。 The present invention relates to a test winding used when testing a through-type current transformer provided in a power receiving / transforming facility such as a substation or a general consumer.
従来、前記受変電設備において前記貫通型変流器の変流比試験や１次試験等の試験を行う際は、別途、電流発生装置を用意し、当該電流発生装置から導出した試験用巻き線を貫通型変流器に数十回巻き付けて、当該巻き線に電流を印加し、前記変流器の二次側に変流比分の電流を出力させることで、変流比の確認や二次側での継電器の動作を確認する試験を行っている（特許文献１）。 Conventionally, when conducting a test such as a current transformation ratio test or a primary test of the feed-through transformer in the power receiving / transforming equipment, a separate current generator is prepared, and a test winding derived from the current generator Is wound around a through-type current transformer several tens of times, a current is applied to the winding, and a current corresponding to the current transformation ratio is output to the secondary side of the current transformer, thereby confirming the current transformation ratio and secondary The test which confirms the operation | movement of the relay by the side is performed (patent document 1).
前記変流比試験は、例えば、変流比が６００／１の場合には、１次側に１５０Ａ流し、２次側に２５０ｍＡ流れることを確認する。また、前記１次試験は、例えば、地絡方向継電器（円盤型）の制定値が１２０Ａの場合、最小動作測定で１２０Ａ、位相特性試験で２４０Ａ流し、継電器の動作を確認するものである。 In the current transformation ratio test, for example, when the current transformation ratio is 600/1, it is confirmed that 150 A flows on the primary side and 250 mA flows on the secondary side. In the primary test, for example, when the established value of the ground fault direction relay (disk type) is 120 A, the operation of the relay is confirmed by flowing 120 A in the minimum operation measurement and 240 A in the phase characteristic test.
しかしながら、貫通型変流器の試験を行う際は、図１０に示すように、ドーナツ状のＣＴ１を電力ケーブル２が貫通しているため、現状では毎回、図１１に示すように、電力ケーブル２とＣＴ１の間の狭隘な隙間を数十回にわたり試験用巻き線５を通し、試験用巻き線５をＣＴ１の貫通孔１ａに巻き付ける必要がある。なお、貫通型変流器ＣＴ１に試験用巻き線を数十回巻き付けるのは、１０回巻き付ければ、試験で流す電流は、１０分の１で済み、２０回巻き付ければ２０分の１で済むためである。従って、数十回にわたり試験用巻き線５をＣＴ１に巻き付けるには、試験準備に時間を要するばかりでなく、設備の損傷や巻き付回数を間違える誤巻き付け等のリスクがある。 However, when testing the feedthrough current transformer, the power cable 2 penetrates the doughnut-shaped CT1 as shown in FIG. 10, so that at present, as shown in FIG. It is necessary to pass the test winding 5 through the narrow gap between CT1 and CT1 several tens of times and wind the test winding 5 around the through hole 1a of CT1. It should be noted that the test winding is wound around the through-type current transformer CT1 several tens of times. If it is wound 10 times, the current to be passed in the test can be reduced to 1/10, and if it is wound 20 times, it is 1/20. That's it. Therefore, in order to wind the test winding 5 around the CT1 for several tens of times, not only does it take time to prepare for the test, but there is also a risk such as damage to the equipment or erroneous winding with the wrong number of windings.
そこで、この発明は、この様な現状を改善するため、所定の巻き付け数で試験用巻き線を予め束ねておき、電力ケーブルの通った貫通型変流器に、極力少ない巻き付け回数で巻き付け、これにより狭隘な場所でも、迅速に且つ安全に巻き付けることが出来る貫通型変流器の試験用巻き線を提供することを目的としたものである。 Therefore, in order to improve such a present situation, the present invention bundles test windings with a predetermined number of windings in advance, and winds them on a through-type current transformer through which a power cable passes with a minimum number of windings. Therefore, it is an object of the present invention to provide a test winding for a through-type current transformer that can be wound quickly and safely even in a narrow space.
請求項１の発明は、貫通型変流器の試験用の電流発生装置から導出し、貫通型変流器の貫通孔に巻き付けて前記試験用の電流発生装置に戻す、両端に接続端子を有する試験用巻き線において、当該試験用巻き線を、前記貫通型変流器の貫通孔に少なくとも１回巻き回す長さを有し、両端に接続端子を有する複数の短巻き線から構成し、これらの短巻き線の前記各接続端子は相互に接続自在かつ前記電流発生装置の端子に接続自在とし、これらの複数の短巻き線を予め束ねた、貫通型変流器の試験用巻き線とした。 The invention of claim 1 is derived from a current generator for testing a through-type current transformer, wound around a through-hole of the through-type current transformer, and returned to the current generator for testing, having connection terminals at both ends. In the test winding, the test winding is composed of a plurality of short windings having a length to be wound around the through hole of the through-type current transformer at least once and having connection terminals at both ends. Each of the connection terminals of the short winding is connectable to each other and to the terminal of the current generator, and a plurality of these short windings are bundled in advance to form a test winding for a through-type current transformer. .
請求項２の発明は、複数の短巻き線を一定間隔で結束具により束ねた、請求項１に記載の貫通型変流器の試験用巻き線とした。 According to a second aspect of the present invention, there is provided a test winding for the through-type current transformer according to the first aspect, in which a plurality of short windings are bundled by a binding tool at regular intervals.
請求項３の発明は、貫通型変流器の試験用の電流発生装置から導出し、貫通型変流器の貫通孔に巻き付けて前記試験用の電流発生装置に戻す、両端に接続端子を有する試験用巻き線において、当該試験用巻き線を所定回数巻き付けた状態で束ね、束ねた一箇所の各電線を切断し、各切断端を接続自在な１組の雄型コネクター及び雌型コネクターで接続した、貫通型変流器の試験用巻き線とした。 The invention of claim 3 is derived from a current generator for testing a through-type current transformer, wound around a through-hole of the through-type current transformer and returned to the current generator for testing, and has connection terminals at both ends. In the test winding, the test winding is bundled in a state where it is wound a predetermined number of times, each electric wire in one bundle is cut, and each cut end is connected by a set of male and female connectors that can be connected freely. The test winding of the through-type current transformer was used.
請求項４の発明は、前記雄型コネクターと雌型コネクターとを区別する表示を夫々に施した、請求項３に記載の貫通型変流器の試験用巻き線とした。 According to a fourth aspect of the present invention, there is provided a test winding for a through-type current transformer according to the third aspect, in which a display for distinguishing the male connector from the female connector is provided.
請求項５の発明は、前記所定数回巻き付けた状態の試験用巻き線を、一定間隔で結束具により束ねた、請求項３又は４のいずれかに記載の貫通型変流器の試験用巻き線とした。 According to a fifth aspect of the present invention, there is provided a test winding for the through-type current transformer according to any one of the third or fourth aspect, wherein the test windings wound in the predetermined number of turns are bundled by a binding tool at regular intervals. A line.
請求項６の発明は、前記一体型の雌型コネクター又は雌型コネクターのいずれかに、切換スイッチを設け、当該切換スイッチは前記所定数回巻き付けた巻き付け回数を選択できる構成とした、請求項３〜５のいずれかに記載の貫通型変流器の試験用巻き線とした。 According to a sixth aspect of the present invention, a change-over switch is provided in either the integrated female connector or the female connector, and the change-over switch can select the number of times of winding the predetermined number of turns. It was set as the test winding of the penetration type current transformer in any one of -5.
請求項１の発明によれば、例えば、試験用巻き線が、１０本の短巻き線を予め束ねたものの場合、貫通型変流器の貫通孔に一度通し、その後各短巻き線を接続端子で相互に接続し、当該試験用巻き線の両端となる短巻き線の接続端子を試験用の電流発生装置の各端子に接続すれば試験準備作業は整う。この場合、貫通型変流器に当該試験用巻き線を１回巻き付ければ、１０回巻き付けたことと同様になる。そして、この様に、１０本の巻き線を予め束ねた物であれば、電流発生装置で１０Ａを出力すると、変流器の貫通孔には１００Ａの電流が流れたこととなり、変流比が１００／１であれば、当該変流器の二次側の継電器等では、１Ａを確認することが出来る。 According to the invention of claim 1, for example, when the test winding is a bundle of 10 short windings in advance, the test winding is passed once through the through hole of the through-type current transformer, and then each short winding is connected to the connection terminal. Then, the test preparation work is completed by connecting them to each other and connecting the connection terminals of the short windings at both ends of the test winding to the terminals of the current generator for testing. In this case, if the test winding is wound once around the through-type current transformer, it is the same as winding 10 times. And if it is the thing which bundled ten windings in advance like this, when 10A is output with a current generator, the current of 100A will flow into the through-hole of the current transformer, and the current transformation ratio will be If it is 100/1, 1A can be confirmed in the secondary relay etc. of the current transformer.
また、当該貫通型変流器の容量に合わせて、試験用巻き線を構成する短巻き線の本数を増減出来、その場合にも必要巻き回数の短巻き線を所定本数用意し、これらを予め束ねておけば、貫通型変流器の貫通孔には、１回又は数回通せば良い。 In addition, the number of short windings constituting the test winding can be increased or decreased in accordance with the capacity of the through-type current transformer. In this case, a predetermined number of short windings having the necessary number of windings are prepared, If bundled, it may be passed once or several times through the through-hole of the through-type current transformer.
従って、試験用巻き線が多数本の短巻き線を束にしたものであれば、貫通型変流器の貫通孔に通す回数は少なくてよく、電力ケーブルが通った変流器の貫通孔のような狭隘な場所でも迅速、かつ安全に試験用巻き線を通すことが出来る。この様に試験用巻き線を変流器の貫通孔に通す回数を減らすことが出来るため、試験準備作業に必要な時間を短縮できる。 Therefore, if the test winding is a bundle of many short windings, the number of times of passing through the through-hole of the through-type current transformer may be small, and the through-hole of the current transformer through which the power cable has passed Even in such a narrow place, the test winding can be passed quickly and safely. Since the number of times the test winding is passed through the through hole of the current transformer can be reduced in this way, the time required for the test preparation work can be shortened.
また、請求項２の発明によれば、試験用巻き線を構成する複数の短巻き線を一定間隔で結束具により束ねたことにより、試験用巻き線が一つに束ねられ、その状態が一本の電線の状態であるため、変流器の貫通孔への挿入等の作業が極めて容易である According to the second aspect of the present invention, the plurality of short windings constituting the test winding are bundled at a predetermined interval by the binding tool, whereby the test windings are bundled into one, and the state thereof is one. Because it is in the state of a wire, it is extremely easy to insert the current transformer into the through hole.
また、請求項３の発明によれば、前記試験用巻き線を１組の雄型コネクターと雌型コネクターとで接続自在に構成しているため、貫通型変流器の貫通孔に試験用巻き線を巻き付ける場合に、雄型コネクターと雌型コネクターを一端外し、貫通孔に試験用巻き線を通してから接続すればよく、貫通孔への巻き付け作業は容易となる。また、これに使用する雄型コネクター及び雌型コネクターは汎用品を用いることが出来、費用対効果にも優れている。また、この様に試験用巻き線を変流器の貫通孔に通す回数を減らすことが出来るため、試験準備作業に必要な時間を短縮できる。 According to the invention of claim 3, since the test winding is configured to be freely connectable with a pair of male connector and female connector, the test winding is provided in the through hole of the through-type current transformer. When winding a wire, the male connector and the female connector may be disconnected at one end and connected to the through-hole after passing through the test winding, and the winding work around the through-hole becomes easy. Moreover, the male connector and the female connector used for this can use a general-purpose product, and are excellent in cost effectiveness. Moreover, since the number of times the test winding is passed through the through hole of the current transformer can be reduced in this way, the time required for the test preparation work can be shortened.
また、請求項４の発明によれば、前記雄型コネクターと雌型コネクターとを区別する表示を夫々に施しているため、電流発生装置から導出した試験用巻き線の印加する極性を確認でき、試験用巻き線の誤接続を回避することが出来る。 In addition, according to the invention of claim 4, since the display for distinguishing the male connector and the female connector is performed respectively, it is possible to confirm the polarity applied by the test winding derived from the current generator, Misconnection of test windings can be avoided.
また、請求項５の発明によれば、前記所定数回巻き付けた状態の試験用巻き線を、一定間隔で結束具により束ねたことにより、試験用巻き線が一つに束ねられ、その状態が一本の電線の状態であるため、変流器の貫通孔への挿入等の作業が極めて容易である。 According to the invention of claim 5, the test windings wound in the predetermined number of times are bundled by a binding tool at a constant interval, so that the test windings are bundled into one, and the state is Since it is in the state of one electric wire, operations such as insertion into the through hole of the current transformer are extremely easy.
また、請求項６の発明によれば、切換スイッチを操作することにより、容易に巻き付け回数を変化させることができるため、電流発生装置の出力電流に合わせて、巻き付け回数を調整することが出来き、試験作業が容易となる。 According to the invention of claim 6, since the number of windings can be easily changed by operating the changeover switch, the number of windings can be adjusted according to the output current of the current generator. Test work becomes easy.
（実施の形態例１）
以下、この発明の実施の形態例１の貫通型変流器の試験用巻き線５を図１に基づいて説明する。なお、当該試験装置は図１１に示すものと基本的には同じものを使用する。
(Embodiment 1)
Hereinafter, a test winding 5 for a through-type current transformer according to Embodiment 1 of the present invention will be described with reference to FIG. The test apparatus is basically the same as that shown in FIG.
この実施の形態例１では、当該試験用巻き線５を、図１に示すように、上記貫通型変流器ＣＴ１の貫通孔１ａに少なくとも１回巻き回す程度の長さを有し、両端に接続端子１５ａを有する複数の短巻き線１５から構成し、これらの短巻き線１５の前記各接続端子１５ａは相互に接続自在である。また、前記各接続端子１５ａは、試験用の電流発生装置４の端子線４ａ及び４ｂに接続自在とし、上記複数の短巻き線１５を予め束ねたものである。なお、図１では５本の短巻き線１５を用意しているが、これらは電流発生装置４の電流容量や貫通型変流器の容量によって増減する。 In the first embodiment, as shown in FIG. 1, the test winding 5 is long enough to be wound around the through-hole 1a of the through-type current transformer CT1 at both ends. It comprises a plurality of short windings 15 having connection terminals 15a, and the connection terminals 15a of these short windings 15 can be connected to each other. The connection terminals 15a are connectable to the terminal wires 4a and 4b of the test current generator 4, and the plurality of short windings 15 are bundled in advance. In FIG. 1, five short windings 15 are prepared, but these increase and decrease depending on the current capacity of the current generator 4 and the capacity of the feedthrough current transformer.
この試験用巻き線５の場合は、貫通型変流器ＣＴ１の貫通孔１ａに通す巻き線の巻き付け回数により、短巻き線１５の数を決定し、これらを予め結束具（図示は省略したが、図１の結束具と同じ）により、短巻き線１５の長手方向に間隔を空けて束ねておく。そして、当該一体となった試験用巻き線５を前記貫通孔１ａに通した後、各短巻き線１５の接続端子１５ａで各短巻き線５相互を接続し、１本の回線にし、その両端の接続端子１５ａ、１５ａを電流発生装置４の端子線４ａ及び４ｂに夫々接続する。これにより、試験準備が完了する。 In the case of this test winding 5, the number of short windings 15 is determined by the number of windings of the winding passed through the through hole 1 a of the through-type current transformer CT 1, and the number of short windings 15 is previously determined as a binding tool (not shown). The same as the binding tool in FIG. 1), the short windings 15 are bundled at intervals in the longitudinal direction. Then, after passing the integrated test winding 5 through the through hole 1a, the short windings 15 are connected to each other by the connection terminals 15a of the short windings 15 to form one line, and both ends thereof Are connected to the terminal wires 4a and 4b of the current generator 4, respectively. Thereby, the test preparation is completed.
なおこの実施の形態例１では、短巻き線１５の長さを貫通型変流器ＣＴ１の貫通孔１ａに少なくとも１回巻き回す程度の長さを有するものとしたが、これは前記貫通１ａに数回〜多数回巻き付ける長さのものを含むものである。 In the first embodiment, the length of the short winding 15 is such that it is wound at least once around the through-hole 1a of the through-type current transformer CT1. Includes a length of several times to many times.
（実施の形態例２）
次に、この発明の実施の形態例２の貫通型変流器の試験用巻き線及びこの試験用巻き線を用いた巻き付け方法を含む試験装置の概略構成を図２及び図３に基づいて説明する。
(Embodiment 2)
Next, a schematic configuration of a test apparatus including a test winding of the penetration type current transformer of Embodiment 2 of the present invention and a winding method using the test winding will be described with reference to FIGS. 2 and 3. To do.
図２に示すように、貫通型変流器ＣＴ１の貫通孔１ａには、電力ケーブル２が通っており、また、貫通型変流器ＣＴ１の二次側は継電器盤３に接続されている。この様なＣＴ１の変流比試験や１次試験を行うには、試験電流を発生させる電流発生装置４を別途設け、当該電流発生装置４から試験用巻き線５を導出し、当該試験用巻き線５を前記貫通型変流器ＣＴ１の貫通孔１ａに通して、再び電流発生装置４に戻している。当該電流発生装置４をオンにすることにより出力電流が発生し、これにより貫通型変流器ＣＴ１の二次側に電流が発生し、継電器盤３が正確に動作するか、また電流値を測定するなどして、上記試験を行う。 As shown in FIG. 2, the power cable 2 passes through the through hole 1a of the through-type current transformer CT1, and the secondary side of the through-type current transformer CT1 is connected to the relay panel 3. In order to perform such a current transformation ratio test and primary test of CT1, a current generator 4 for generating a test current is separately provided, a test winding 5 is derived from the current generator 4, and the test winding is generated. The wire 5 is passed through the through-hole 1a of the through-type current transformer CT1 and returned to the current generator 4 again. When the current generator 4 is turned on, an output current is generated. This generates a current on the secondary side of the feedthrough current transformer CT1, and the relay panel 3 operates accurately, and the current value is measured. The above test is performed.
そこで、この発明では、図３に示すように、予め、試験用巻き線５を略円形に複数回巻き付けてこれを一つに束ねる。図では５回巻き付けているが、ここでは、１０回巻き付けたこととする。そして、束ねた巻き線５の一端を切断し、一方の複数の切断端５ａを１個の雄型コネクター６に接続し、他方の複数の切断端５ｂを１個の雌型コネクター７に接続する。また、前記雄型コネクター６には「Ｋ」、また、前記雌型コネクター７には「Ｌ」の表示を施している。 Therefore, in the present invention, as shown in FIG. 3, the test winding 5 is previously wound in a substantially circular shape a plurality of times and bundled together. Although it is wound five times in the figure, it is assumed here that it is wound ten times. Then, one end of the bundled winding 5 is cut, one of the plurality of cut ends 5 a is connected to one male connector 6, and the other plurality of cut ends 5 b are connected to one female connector 7. . The male connector 6 is indicated by “K”, and the female connector 7 is indicated by “L”.
これらの雄型コネクター６と雌型コネクター７とは、雄型コネクター６の１０個のピン６ａを雌型コネクター７の１０個の穴７ａに接合することにより、各巻き線５が電気的に接続される構成となっている（ただし、図では５本のピンの表示）。従って、これらの雄型コネクター６及び雌型コネクター７を接続すると、前記電流発生装置４から導出された試験用巻き線５は１本の回線となり、当該電流発生装置４に戻る構成となる。また、前記束ねた試験用巻き線５は、略一定間隔で結束具８により、結束されている（図２参照）。 These male connector 6 and female connector 7 are electrically connected to each other by winding 10 pins 6 a of male connector 6 into 10 holes 7 a of female connector 7. (However, in the figure, five pins are shown). Therefore, when the male connector 6 and the female connector 7 are connected, the test winding 5 led out from the current generator 4 becomes one line and returns to the current generator 4. Further, the bundled test windings 5 are bound by a binding tool 8 at a substantially constant interval (see FIG. 2).
この試験用巻き線５を用いて貫通型変流器ＣＴ１の試験をするには、試験用巻き線５の雄型コネクター６および雌型コネクター７を外し、当該試験用巻き線５の両端の接続端子を電流発生装置４の端子に接続する。その際、雄型コネクター６が接続された試験用巻き線５の接続端子を電流発生装置４の電源側、又はプラス側の端子に接続し、雌型コネクター７が接続された試験用巻き線５の接続端子を電流発生装置４の負荷側、又はマイナス側の端子に夫々接続する。 In order to test the through-type current transformer CT1 using the test winding 5, the male connector 6 and the female connector 7 of the test winding 5 are removed and both ends of the test winding 5 are connected. The terminal is connected to the terminal of the current generator 4. At that time, the connection terminal of the test winding 5 to which the male connector 6 is connected is connected to the power source side or the positive side terminal of the current generator 4, and the test winding 5 to which the female connector 7 is connected. Are connected to the load-side or minus-side terminals of the current generator 4 respectively.
その際、各コネクター６又は７の「Ｋ」又は「Ｌ」が目印となる。そして、雄型コネクター６又は雌型コネクター７を端部に有する試験用巻き線５を貫通型変流器ＣＴ１の貫通孔１ａに１回通して、貫通型変流器ＣＴ１の外で、雄型コネクター６及び雌型コネクター７を接続する。 At that time, “K” or “L” of each connector 6 or 7 becomes a mark. Then, the test winding 5 having the male connector 6 or the female connector 7 at the end is passed once through the through-hole 1a of the through-type current transformer CT1, and outside the through-type current transformer CT1, the male type The connector 6 and the female connector 7 are connected.
その後、電流発生装置４をオンにし、例えば、１０Ａを出力する。上記試験用巻き線５は予め１０回巻きにしているため、当該試験用巻き線５には１００Ａが流れる。また、当該貫通型変流器ＣＴ１の変流比は１００／１とする。この場合は、継電器盤３では、１Ａの電流を計測すれば、当該貫通型変流器ＣＴ１は正常に作動することが確認出来る。 Thereafter, the current generator 4 is turned on and, for example, 10 A is output. Since the test winding 5 is previously wound 10 times, 100 A flows through the test winding 5. The current transformer ratio of the through-type current transformer CT1 is 100/1. In this case, in the relay panel 3, if a current of 1A is measured, it can be confirmed that the through-type current transformer CT1 operates normally.
また、当該試験用巻き線５を貫通型変流器ＣＴ１の貫通孔１ａに３回巻き付ければ、電流発生装置４で１０Ａを発生させた場合、試験用巻き線５には３００Ａの電流が発生する。その際も試験用巻き線５は結束具８で束ねられているため、貫通型変流器ＣＴ１の狭い貫通孔にも容易に通すことが出来る。 Further, if the test winding 5 is wound around the through-hole 1a of the through-type current transformer CT1 three times, when 10 A is generated by the current generator 4, a current of 300 A is generated in the test winding 5. To do. Also in this case, since the test winding 5 is bundled by the binding tool 8, it can be easily passed through the narrow through-hole of the through-type current transformer CT1.
なお、上記実施の形態例２では、一組の雄型コネクター６及び雌型コネクター７としているが、これに限らず、試験用巻き線５の各回線毎に雄型又は雌型コネクターを接続する構成でもよい。 In the second embodiment, a pair of male connector 6 and female connector 7 is used. However, the present invention is not limited to this, and a male or female connector is connected to each line of the test winding 5. It may be configured.
（実施の形態例３）
図４〜図９はこの発明の実施の形態例３を示す。この実施の形態例３の試験用巻き線は、実施の形態例２の試験用巻き線とほぼ同じであるが、雌型コネクター７にダイヤル式の切替スイッチ９を設け、試験用巻き線５の巻き数を変更させることが出来る点が異なる。
(Embodiment 3)
4 to 9 show a third embodiment of the present invention. The test winding of the third embodiment is almost the same as the test winding of the second embodiment, but the female connector 7 is provided with a dial-type changeover switch 9 so that the test winding 5 The difference is that the number of turns can be changed.
この切替スイッチ９の下面には、切替スイッチ９の回転軸と同心円で円形導体部９ａが設けられ、この円形導体部９ａの一端から放射状に１本の直線導体部９ｂが設けられている。また、切替スイッチ９に対向する雌型コネクター７の表面には、前記直線導体部９ｂが接触可能に、切替スイッチ９と同軸円上に端子７１〜７１０が間隔を空けて設けられている。 On the lower surface of the changeover switch 9, a circular conductor portion 9a is provided concentrically with the rotation axis of the changeover switch 9, and one linear conductor portion 9b is provided radially from one end of the circular conductor portion 9a. Further, on the surface of the female connector 7 facing the changeover switch 9, terminals 71 to 710 are provided on the same circle as the changeover switch 9 so as to be in contact with the linear conductor portion 9b with a space therebetween.
また、雌型コネクター７の共通線５ｃの端子が、常時切替スイッチ９の前記円形導体部９ａに接触する構成となっている。さらに、切替スイッチ９の外側の雌型コネクター７の表面には、前記端子７１〜７１０に相応する箇所に、巻き付け回数を示す回数表示１〜１０が表示されている。 Further, the terminal of the common line 5 c of the female connector 7 is configured to contact the circular conductor portion 9 a of the constant changeover switch 9. Further, on the surface of the female connector 7 outside the changeover switch 9, frequency indications 1 to 10 indicating the number of windings are displayed at locations corresponding to the terminals 71 to 710.
図４は、前記切替スイッチ９を使用することにより試験用巻き線５を貫通型変流器ＣＴ１の貫通孔１ａに１ターン巻きの状態を示す概略構成図であり、その時の前記切替スイッチ９の円形導体部９ａ及び直線導体部９ｂの位置を図５に示す。 FIG. 4 is a schematic configuration diagram showing a state in which the test winding 5 is wound around the through-hole 1a of the through-type current transformer CT1 by using the change-over switch 9, and the change-over switch 9 at that time is shown in FIG. The positions of the circular conductor portion 9a and the straight conductor portion 9b are shown in FIG.
ここでは切替スイッチ９の直線導体部９ｂを雌型コネクター７の回数表示１に回して合わせる。これにより前記直線導体部９ｂは雌型コメクター７の端子７１に接触する。そして試験用巻き線５は貫通型変流器ＣＴ１の貫通孔１ａに１回通した後、雄型コネクター６を介して雌型コネクター７に入り、雌型コネクター７の端子７１から切替スイッチ９の直線導体部９ｂを経て円形導体部９ａを通り、試験用巻き線５の共通線５ｃを通って電流発生装置４に戻る。 Here, the linear conductor portion 9b of the changeover switch 9 is turned to match the number display 1 of the female connector 7. As a result, the linear conductor portion 9 b comes into contact with the terminal 71 of the female comector 7. The test winding 5 passes through the through-hole 1a of the through-type current transformer CT1 once and then enters the female connector 7 through the male connector 6, and from the terminal 71 of the female connector 7 to the switch 9 After passing through the straight conductor portion 9b, the circular conductor portion 9a, the common wire 5c of the test winding 5 and the current generator 4 are returned.
図６は、前記切替スイッチ９を使用することにより試験用巻き線５を貫通型変流器ＣＴ１の貫通孔１ａに３ターン巻きの状態を示す概略構成図であり、その時の前記切替スイッチ９の円形導体部９ａ及び直線導体部９ｂの位置を図７に示す。 FIG. 6 is a schematic configuration diagram showing a state in which the test winding 5 is wound around the through-hole 1a of the through-type current transformer CT1 by using the change-over switch 9 for three turns. The positions of the circular conductor portion 9a and the straight conductor portion 9b are shown in FIG.
ここでは切替スイッチ９の直線導体部９ｂを雌型コネクター７の回数表示３に回して合わせる。これにより前記直線導体部９ｂは雌型コネクター７の端子７３に接触する。そして試験用巻き線５は貫通型変流器ＣＴ１の貫通孔１ａに３回巻き通した後、雄型コネクター６を介して雌型コネクター７に入り、雌型コネクター７の端子７３から切替スイッチ９の直線導体部９ｂを経て円形導体部９ａを通り、試験用巻き線５の共通線５ｃを通って電流発生装置４に戻る。 Here, the straight conductor portion 9b of the changeover switch 9 is turned to match the number display 3 of the female connector 7. As a result, the linear conductor portion 9 b comes into contact with the terminal 73 of the female connector 7. The test winding 5 is wound three times through the through-hole 1a of the through-type current transformer CT1, and then enters the female connector 7 through the male connector 6, and from the terminal 73 of the female connector 7 to the changeover switch 9 After passing through the straight conductor portion 9b, the circular conductor portion 9a, the common wire 5c of the test winding 5 is returned to the current generator 4.
図８は、前記切替スイッチ９を使用することにより試験用巻き線５を貫通型変流器ＣＴ１の貫通孔１ａに１０ターン巻きの状態を示す概略構成図であり、その時の前記切替スイッチ９の円形導体部９ａ及び直線導体部９ｂの位置を図９に示す。 FIG. 8 is a schematic configuration diagram showing a state in which the test winding 5 is wound around the through-hole 1a of the through-type current transformer CT1 by using the change-over switch 9 for 10 turns. The positions of the circular conductor portion 9a and the straight conductor portion 9b are shown in FIG.
ここでは、切替スイッチ９の直線導体部９ａを雌型コネクター７の回数表示１０に回して合わせる。これにより前記直線導体部９ｂは雌型コネクター７の端子７１０に接触する。そして試験用巻き線５は貫通型変流器ＣＴ１の貫通孔１ａに１０回巻き通した後、雄型コネクター６を介して雌型コネクター７に入り、雌型コネクター７の端子７１０から切替スイッチ９の直線導体部９ｂを経て円形導体部９ａを通り、試験用巻き線５の共通線５ｃを通って電流発生装置４に戻る。 Here, the straight conductor portion 9 a of the changeover switch 9 is turned to match the number display 10 of the female connector 7. As a result, the linear conductor portion 9 b comes into contact with the terminal 710 of the female connector 7. Then, the test winding 5 is wound 10 times through the through hole 1a of the through-type current transformer CT1, and then enters the female connector 7 through the male connector 6, and from the terminal 710 of the female connector 7 to the changeover switch 9 After passing through the straight conductor portion 9b, the circular conductor portion 9a, the common wire 5c of the test winding 5 is returned to the current generator 4.
上記雌型コネクター７の端子７１〜７１０、切替スイッチ９の円形導体部９ａ及び直線導体部９ｂは印加電流に耐えうる接点とするが、電流印加時には切替を禁止すべきである。また、接点容量は１０Ａ程度までとし、短絡、地絡のない構造とする。さらに、切替スイッチ９は、切替スイッチ９自体を手前に引っ張って回さなければ、回転しない構成とするなど、ロック機構付きであることが好ましい。 The terminals 71 to 710 of the female connector 7 and the circular conductor portion 9a and the straight conductor portion 9b of the changeover switch 9 are contacts that can withstand the applied current, but switching should be prohibited when the current is applied. The contact capacity is up to about 10A, and there is no short circuit or ground fault. Furthermore, it is preferable that the changeover switch 9 has a lock mechanism such that the changeover switch 9 itself does not rotate unless the changeover switch 9 itself is pulled and rotated.
この様にして、貫通型変流器ＣＴ１の変流比や電流発生装置４の出力電流によって、試験用巻き線５の巻き回数を切り替えることが出来、試験作業が容易となる。 In this way, the number of turns of the test winding 5 can be switched by the current transformation ratio of the through-type current transformer CT1 and the output current of the current generator 4, thereby facilitating the test work.
ＣＴ１ 貫通型変流器 １ａ 貫通孔
２ 電力ケーブル ３ 継電器盤
４ 電流発生装置 ４ａ 端子線
４ｂ 端子線 ５ 試験用巻き線
５ａ 切断端 ５ｂ 切断端
５ｃ 共通線 ６ 雄型コネクター
６ａ ピン ７ 雌型コネクター
７ａ 孔 ８ 結束具
９ 切替スイッチ ９ａ 円形導電部
９ｂ 直線導電部 １５ 短巻き線
１５ａ 接続端子
７１〜７１０ 端子
CT1 Through-type current transformer 1a Through-hole 2 Power cable 3 Relay panel 4 Current generator 4a Terminal wire 4b Terminal wire 5 Test winding
5a cut end 5b cut end 5c common line 6 male connector 6a pin 7 female connector 7a hole 8 binding tool 9 changeover switch 9a circular conductive portion 9b linear conductive portion 15 short winding 15a connection terminal
71-710 terminals
Claims (6)
当該試験用巻き線を、前記貫通型変流器の貫通孔に少なくとも１回巻き回す長さを有し、両端に接続端子を有する複数の短巻き線から構成し、これらの短巻き線の前記各接続端子は相互に接続自在かつ前記電流発生装置の端子に接続自在とし、これらの複数の短巻き線を予め束ねたことを特徴とする、貫通型変流器の試験用巻き線。 In a test winding having connection terminals at both ends, derived from a current generator for testing a through-type current transformer, wound around a through-hole of the through-type current transformer and returned to the current generator for testing,
The test winding is composed of a plurality of short windings having a length wound around the through hole of the through-type current transformer at least once, and having connection terminals at both ends. Each connection terminal is connectable to each other and to the terminal of the current generator, and a plurality of short windings are bundled in advance.
当該試験用巻き線を所定回数巻き付けた状態で束ね、束ねた一箇所の各電線を切断し、各切断端を接続自在な１組の雄型コネクター及び雌型コネクターで接続したことを特徴とする、貫通型変流器の試験用巻き線。 In a test winding having connection terminals at both ends, derived from a current generator for testing a through-type current transformer, wound around a through-hole of the through-type current transformer and returned to the current generator for testing,
The test winding is bundled in a state of being wound a predetermined number of times, each bundled wire is cut, and each cut end is connected by a set of connectable male and female connectors. , Test winding for through-type current transformer.
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