457507 A7 ^------B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（1 ) 【發明所屬之技術領域】 本發明彳系關於裝載於配電用之漏電斷路器之零相變流 器之裝配方法。 【先行技術】 首先’將上述漏電斷路器（三相用）之構成表示於第 5圖。於圖，1係上下分割爲二之斷路器殼，2係主電路 之電源側端子’ 3係負荷側端子，4係固定接觸件，5係 可動接觸件，6係開閉操作手柄，7係超電流拉開單元， 8係零相變流器，貫通零相變流器之各相一次導體9爲在 器殼內連接於組裝於器殼1之各相所對應之主電路零件。 按’ 1 0係漏電電流檢測電路之印刷電路板。 於此，裝配裝載於漏電斷路器之零相變流器8與貫通 —次導體9之零相變流器單元於以往之裝配構造，及其裝 配方法以第6圖（a) ， （b)說明。首先，如第6圖（ a )所示，將對於平角導體9 a被覆絕緣軟管9 b之R’ S，T相之各相所對應之一次導體9R，9S，9T彎曲 加工成L字形穿通於零相變流器8之一次導體貫通孔8 a 之後，再如第6圖)彎曲加工爲：？字形。按，於圖中 8 b從零相變流器8拉出之輸出線。 並且，將上述零相變流器8與貫通一次導體9與裝配 體組裝於第5圖所示漏電斷路器器殼1之後，將各相之一 次導體9R，9S，9T兩端焊錫於各相之主電路零件。 然而，於上述之以往構造之零相變流器單冗’係在:其 (請先閱讀背面之注意事項再填窝本頁) 本紙張尺度適用令國國家標準（CNS)A4規格（210 X 297公釐） -4- 4 57507 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（2 ) 裝配性上具有下列問題。亦即， (1 )將一次導體9如第6 (b ) _灣曲初工壤3字 形時，零相變流器8將成.障礙物不能以良好精度進行彎曲 加工。 (2 )在一次導體9之彎曲加工時，恐絕綠軟管9七 有損傷之虞。 (3 )貫插於零相變流器8各相之一次導體9 R , 9S，9T不被固定於一定位置因其相對位置會變成不安 定，所以，平衡特性容易發生不均勻。 ^ 於是，作爲這種問題之解決措施，將零相變流器之貫 通一次導體，夾住零相變流器配置在其兩側之同一面上之 各相所對應之平形導體，與依各相貫通零相變流器之一次 導體貫通孔而接合於上述平形導體間之桿狀導體（圓桿導 體）加以裝配成爲一體化之零相變流器單元之裝配構造， 係由與本發明之同一申請人已經以曰本專利特開平1 〇 _ 321116號提出申請獲准。 於上述專利如其公開特許公報所揭示，夾住零相變流 器配置於其兩側各相之一次導體，及將桿狀導體分爲群組 別之後，個別地製作將其周域以樹脂成形一體之區塊（於 此區塊狀態，爲將各導體兩端爲了進行下面導體間接合加 以露出），在下一裝配工程組合上述一次導體之各區塊與 零相變流器之後，將穿通於零相變流器之一次導體貫通孔 之桿狀導體兩端熔接接合於平形導體先端，在最後工程將 導體之熔接接合部，及貫插桿狀導體在零相變流器之孔內 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -5- A7 B7 經濟部智慧財產局員工消f合作社印製 五、發明說明（3) 部填充矽，環氧樹脂等絕緣物加以密封。 若依據此裝配構造，在單元裝配時就不需要如以往之 一次導體之彎曲加工（參照第6圖），並且，也不需要對 於各個一次導體之絕緣軟管之被覆，並且，對於零相變流 器可將各相之一次導體定位於定位置加以固定，所以，與 第6圖所示之裝配構造相較除了裝配精度，平衡特性可更 加提升之外，並且，不依靠裝配作業員之手工作業也可對 應於裝配機器手臂之自動裝配方式實施》 【發明所欲解決之問題】 然而，於上述日本專利特開平1 0 - 3 2 1 1 1 6號 所提案之零相變流器單元之裝配方法，係在裝配作業，及 安定之品質確保上具有下列之問題。亦即， (1 ) 一次導體係將各導體分爲群組加以區塊化之後 ，爲了依各區塊進行樹脂成形所以其成形次數就變多，並 且，組合樹脂成形之一次導體之各區塊與零相變流器接合 平形導體與桿狀導體之後，因需要其導體塁贪部，及零相 變流器之一次導體貫通孔之間隙以樹脂密封之另外作業> 所以，其裝配工程數就增加而成本變成偏高。 (2 )於前項（1 )將對於導體間之接合部，零相變 流器之一次導體貫通孔之樹脂密封因依靠手工作業，在桿 狀導體與零相變流器孔之間毫無留間隙地到各角落塡充樹 脂將變成困難，及殘留於樹脂層內之空隙爲原因致使降低 絕緣特性等，容易發生製品品質之偏差。 本紙張尺度^用tia家標準（CNS)A4規格<210 X 297公 <請先閱讀背面之注意事項再填寫本頁) 457507 A7 ____B7 五、發明說明（4 ) 本發明係鑑於上述事項所開發者，其目的係提供一種 -解決上述問題，與樹脂形成工程一倂之削減化即使於絕緣 _ 特性上也可確保安定品質，改良良率之裝載漏電斷路器用 零相變流器單元之裝配方法。 【解決問題之手段】 爲了達成上述目的，依據本發明，零相變流器與作爲 其貫通一次導體之裝配體所構成之零相變流器單元之一次 導體，爲夾住零相變流器分配配置於其兩側同一面上之各 相所對應之平形導體，與依各相貫通零相變流器之一次導 體貫通孔接合於上述平形導體間之桿狀導體所構成，將其 周域以樹脂成形爲一體者， 將上述一次導體之各導體仍以裸導體之狀態，接合於 貫插於零相變流器之桿狀導體兩端排列於定位置之平形導 體臨時裝配單元，然後’對於上述單元臨時裝配體’包括 零相變流器之導體貫通孔內部’導體間之接合部將一次導 體之周域總括以樹脂成形爲一體（申請專利範圍第1項） 者，具體上爲可如下述態樣實施。 (1 )作爲將各相之平形導體布置於裝配位置從一張 板衝穿加工者，將各平形導體與其母材外框之間從其後切 斷之繫桿（tie bar)連接’在此狀態下於此各相之平形導 體先端與桿狀導體接合將單元進行臨時裝配（申請專利範 圍第2項）11 (2 )將單元臨時裝配體放入金屬模，由射出成形法 _本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公蹵) ~ (請先閱讀背面之注音3事項再填寫本頁) 訂· _ -線· 經濟部智慧財產局員工消費合作社印製 457 5 0 7 a? B7 五、發明說明（5) 進行嵌入成形（申請專利範圍第3項）。 若依據上述裝配方法，將貫通夾住零相變流器配置於 其兩側之一次導體之平形導體與零相變流器之桿狀導體之 接合先行於樹脂形成實施，其後將各一次導體與零相變流 器之臨時裝配體由射出成形法以樹脂一體地進行嵌入成形 ，所以，也包括零相變流器之導體貫通孔內部，導體間之 接合部之樹脂密封樹脂成形工程爲一次就結束，並且，加 壓注入於成形金屬模之樹脂因平均地塡充於金屬模之各角 落，所以，各一次導體之互相間，及導體與零相變流器之 間不至於發生空隙，藉此就可得到安定之絕緣特性。 【發明之實施形態】 茲將本發明之實施形態依據第1圖、第4圖之實施例 說明如下。 於此，第1 ( a ) ( b )圖係零相變流器單元之完成 製品之外觀圖，第2 ( a ) ( b )圖係樹脂成胗工程前之 臨時裝配狀態之外觀圖，第3圖係進行臨時裝配前階段之 各零件之分解圖，第4 ( a )〜（c )係表示零相變流器 之構造圖。又，於各圖，8係零相變流器，1 1R， 11S，1 1T，及 12R，12S * 12T係分別夾住 .零相變流器8配置於其兩側之R，S ’ T相之各相所對應 之一次導體之平形導體，13R，13S，13T係透過 零相變流器8之一次導體貫通孔8 a接合於上述平形導體 11R， 11S， 11T與12R， 12S， 12T間之 (請先閱讀背面之注意事項再填寫本頁) 訂.· --線- 經濟部智慧財產局員工消費合作杜印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） -8- 經濟部智慧財產局員工消費合作社印製 457507 A7 B7 五、發明說明（6) r , S，τ相所對應之桿狀導體（圓桿導體），1 4 (參 照第1圖）係表示由射出成形法形成於零相變流器單元之 裝配體周域之密封樹脂。 茲說明依據本發明之零相變流器單元之裝配方法如下 。首先，於第3圖，關於配置在零相變流器8單側之平形 導體1 2R ’ 1 2 S，1 2T ’係將各導體葙置於裝配位 置從一張板（母材）連同先端部之銷孔1 2 a以沖壓加工 衝穿形成者，衝穿後之狀態下如圖示’將母材之外框 12b與各平形導體12R，12S，1_2T之間，以繫 桿1 2 c連結。按，此繫桿1 2 c係臨時裝配後切斷與平 形導體之間。 並且，連結於外框1 2 b狀態之平形導體1 2 R ’ 1 2 S，1 2 T作爲基座對於開口於各平形導體先端之銷 孔12a植設桿狀導體13R，13S，13T之後，在 此桿狀導體穿通零相變流器8之一次導體貫通孔8 a。其 次，從零相變流器8相反側將平形導體1 1 R ’ 1 1 S ’ 11Τ抵壓於桿狀導體13R’ 13S，13Τ壓入於先 端之銷孔1 1 a，在此狀態下熔接接合桿狀導體1 3 R 1 13S， 13T兩端與平形導體11R， IIS， 11T ，及12R，12S，12T之連接部。藉此，就完成第 2圖所示之單元臨時裝配體。按’於第2圖之裝配狀態時 ，切斷第3圖所示之繫桿12c。按’於上述實施例’也 可以將位於第3圖之身前側之平形導體1 1 R，1 1 S ’ 1 1 T也布置於既定之裝配位置在外框經由繫桿連結。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） -9 - ------------τ^------IJ 訂---------線 1 *"- (請先閱讀背面之注意事項再填寫本頁) 4 5? 5 〇 7 A7 ------ B7 五、發明說明（7 ) 於此，將採用於該單元之零相變流器8之構造表示於 第4 ( a )〜（c )圖。亦即，零相變流器8係捲裝輸出 二次線圈之磁心8 a從左右被覆變成二分割構造之遮屏 8 d |並且，變成嵌入收容於於樹脂製之外殼8 e之構造 。又，上述遮屏8 d係將高透磁率之冷壓輥軋鋼板作爲材 料，由沖壓成形加工成如圖示之形狀者，尤其於圖示之實 施例之構造，係成形加工爲遮屏8 d底部之壁厚d 2變成 • 周壁部之壁厚dl之1·3〜1·6倍。藉此，夾住零相 變流器8重疊於其兩側平形導體所流動之電流磁線將集聚 於壁厚之厚遮屏8 d底部 > 所以邊抑制半徑方向之外形尺 寸就可得到高遮屏效果。 其次，將第2圖之單元臨時裝配體移至射出成形工程 ，於此將單元臨時裝配體插入於成形金屬模之後，在金屬 模加壓注入注型樹脂成形爲一體*就可完成第1圖所示變 成一體構造之零相變流器單元° 藉此射出成形，包括貫插桿狀導體1 3R，1 3S， 1 3 T之零相變流器8之一次導體貫通孔8 a內部，桿狀 導體兩端與平形導體間之熔接接合部，各平形導體之互相 間到各角落毫無遺留間隙，空隙，單元臨時裝配體之周域 總括由密封樹脂1 4所包覆。藉此，在零相變流器與一次 導體之間可確保安定之平衡特性與高絕緣特性。 【發明效果】 如上述，若依據本發明之零相變流器單元之裝配方法 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 2耵公釐） -10- (請先閱讀背面之注音？事項再填寫本頁) 訂. --線. 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 457507 Α7 Β7 五、發明說明（8) ，一次導體之各導體爲在裸導體之狀態下’將貫插零相變 流器之桿狀導體兩端接合於排列於定位置之平形導體以臨 時裝配單元，然後，對於上述之單元臨時裝配體’包含零 相變流器之導體貫通孔內部’導體間之接合部藉將一次導 體之周域總括以樹脂成形爲一體，關於同一申請人先前獲 准專利之日本專利特開平1 0 _ 3 2 1 1 1 6號之裝配構 造之零相變流器單元’將平衡特性，絕緣特性上之安定之 高品質之製品以低成本良好的生產力製作。又'’因由射出 成形法將單元裝配體總括成形爲一體’所以’就不需要用 人工作業之樹脂密封作業，可將所有裝配工程以機械手臂 等進行自動裝配。 六.圖式之簡單說明 第1圖係零相變流器單元之裝配後之外觀斜視圖，（ a ) ，（ b )係分別從正面側，背面側所視之圖。 第2圖係於第1圖之樹脂形成前階段之單元臨時裝配 體之外觀斜視圖，（a ) ，（ b )係分別從正面側，背面 側所視之圖。 第3圖係於第2圖之裝配零件之分解斜視圖。 第4圖係第1圖之單元所採用之零相變流器之構造圖 ，（a )係外觀斜視圖，（b )係分解斜視圖，（c )係 (b )圖之剖面圖。 第5圖係組裝零相變流器單元之漏電斷路器之構成剖 面圖。 本紙張尺度適用中關家標準（CNS)A4規格（21Q X 297公ίΓ) -11- ~ ' ---—---*---— ---訂，----— I! 、y (請先閱讀背面之注意事項再填寫本頁) 7 5 0 7 A7 ___B7 _ 五、發明說明（9) 第6圖係於以往之零相變流器單元之構造，裝配方法 之說明圖，（a ) ，（ b )係分別裝配工程之前半，後半 狀態之外觀斜視圖。 【符號之說明】 1 斷路器殼，8 零相變流器，8a —次導體貫通孔 ，9 貫通一次導體， (請先閱讀背面之注意事項再填寫本頁) -I. _·-~·/ί4/\ n In i n n 、1 [1 an n ^1« n I 1 言 矣 11 R，1 1 S，1 1 T 平形導體，1 1 b 母材之外 框， 11c 繫桿， 12 R，1 2 S，1 2 T 平形導體， 13 R ，1 3 S ，1 3 T 桿狀導體，1 4 密封樹脂 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -12-457507 A7 ^ ------ B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to the zero phase of a leakage circuit breaker installed in power distribution. Assembly method of converter. [Advanced Technology] First, the structure of the above-mentioned earth leakage circuit breaker (for three-phase) is shown in FIG. 5. In the figure, 1 is a circuit breaker case that is divided up and down into 2; 2 is the power-side terminal of the main circuit; 3 is the load-side terminal; 4 is the fixed contact; 5 is the movable contact; 6 is the opening and closing operation handle; 7 is the super The current pull-off unit, an 8-series zero-phase converter, and the primary conductors 9 passing through each phase of the zero-phase converter are main circuit parts connected to each phase assembled in the device casing 1 in the device case. Press '10 for the printed circuit board of the leakage current detection circuit. Here, the conventional assembly structure of the zero-phase converter unit 8 and the through-subconductor 9 zero-phase converter unit mounted on the earth leakage circuit breaker is assembled, and the assembling method is shown in FIG. 6 (a), (b) Instructions. First, as shown in FIG. 6 (a), the primary conductors 9R, 9S, and 9T corresponding to the phases of the R'S and T phases of the rectangular conductor 9a covered with the insulated hose 9b are bent into an L-shaped punch-through. After the primary conductor through hole 8 a of the zero-phase converter 8, the bending process is performed as shown in FIG. 6): Glyph. Press the output line drawn from the zero-phase converter 8 in Figure 8b. In addition, after assembling the zero-phase converter 8 and the penetrating primary conductor 9 and the assembly to the earth leakage circuit breaker case 1 shown in FIG. 5, both ends of the primary conductors 9R, 9S, and 9T of each phase are soldered to each phase. Main circuit parts. However, the zero phase converter of the conventional structure described above is redundant: it (please read the precautions on the back before filling in this page) This paper size applies the national standard (CNS) A4 specification (210 X 297 mm) -4- 4 57507 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (2) The following problems are encountered in terms of assembly. That is, (1) When the primary conductor 9 is shaped like the 6th (b) _ Wanqu early industrial soil, the zero-phase converter 8 will be formed. The obstacle cannot be bent with good accuracy. (2) During the bending process of the conductor 9, the green hose 97 may be damaged. (3) The primary conductors 9 R, 9S, and 9T inserted in each phase of the zero-phase converter 8 are not fixed at a certain position because their relative positions become unstable. Therefore, unevenness is liable to occur. ^ As a solution to this problem, pass the zero-phase converter through the primary conductor, sandwich the flat conductors corresponding to the phases of the zero-phase converter on the same side of the two sides, and The phase-through zero-phase current transformer has a primary conductor through-hole and is connected with the rod-shaped conductor (round rod conductor) between the flat conductors to be assembled into an integrated zero-phase converter unit assembly structure. The same applicant has filed an application under Japanese Patent Laid-Open No. 10-321116 for approval. As disclosed in the above-mentioned patent, as disclosed in its published patent publication, a zero-phase converter is disposed between the primary conductors disposed on each side of the two sides, and the rod-shaped conductors are divided into groups, and the peripheral area is individually formed by resin molding. An integrated block (in this block state, in order to expose the two ends of each conductor for the bonding between the lower conductors), after the next assembly project combines the blocks of the above-mentioned primary conductor and the zero-phase converter, it will pass through The two ends of the rod-shaped conductor of the primary conductor through-hole of the zero-phase converter are welded to the leading end of the flat conductor. In the final project, the welded joint of the conductor and the inserted conductor are inserted into the hole of the zero-phase converter (please (Please read the notes on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -5- A7 B7 Printed by the staff of the Intellectual Property Bureau of the Ministry of Economic Affairs. (3) Fill with silicon, epoxy and other insulators to seal. According to this assembly structure, it is not necessary to bend the primary conductor as before (refer to Figure 6) when the unit is assembled, and it is not necessary to cover the insulation hose of each primary conductor, and for zero phase change The current transformer can fix the primary conductor of each phase at a fixed position, so compared with the assembly structure shown in Fig. 6, in addition to the assembly accuracy and balance characteristics, it can also be improved, and does not rely on the manual of the assembly operator The operation can also be implemented corresponding to the automatic assembling method of assembling a robot arm. [Problems to be Solved by the Invention] However, in the above-mentioned Japanese Patent Laid-Open No. 1 0-3 2 1 1 1 6 The assembly method has the following problems in assembling operations and ensuring stable quality. That is, (1) after the primary conductor system divides each conductor into groups and blocks it, in order to perform resin molding according to each block, the number of molding times increases, and each block of the primary conductor formed by combining resins is combined After joining the flat conductor and the rod-shaped conductor with the zero-phase converter, it is necessary to perform the additional work of sealing the gap between the conductor ridge of the conductor and the primary conductor through hole of the zero-phase converter with resin. It increases and the cost becomes high. (2) In the preceding paragraph (1), the resin seal of the primary conductor through hole of the zero-phase converter for the joint between conductors is left by hand, leaving no gap between the rod-shaped conductor and the zero-phase converter hole. It will be difficult to fill the resin with gaps to the corners, and the voids remaining in the resin layer cause the insulation properties to be lowered, which may cause variations in product quality. The dimensions of this paper are in accordance with Tia's Standard (CNS) A4 specifications <210 X 297 males <Please read the notes on the back before filling out this page) 457507 A7 ____B7 5. Description of the invention (4) The present invention is based on the above issues. The developer's goal is to provide a zero-phase converter unit for earth leakage circuit breakers, which can solve the above-mentioned problems and reduce the amount of resin formation process. It can ensure stable quality and improve the yield. method. [Means for solving the problem] In order to achieve the above-mentioned object, according to the present invention, the primary conductor of a zero-phase converter unit composed of a zero-phase converter and an assembly that passes through the primary conductor is a clamped zero-phase converter The flat conductors corresponding to the phases arranged on the same side of both sides are distributed, and the primary conductor through-holes passing through the zero-phase converter according to the phases are connected to the rod-shaped conductors between the flat conductors, and the peripheral area is formed. For the resin molding as a whole, the conductors of the above-mentioned primary conductors are still in the state of bare conductors, and are joined to a flat conductor temporary assembly unit arranged at a fixed position at both ends of a rod-shaped conductor inserted in a zero-phase converter, and then ' For the above-mentioned unit temporary assembly 'including the inside of the through-hole of the conductor of the zero-phase converter', the joint between the conductors is formed by integrating the circumference of the primary conductor into a resin (item 1 in the scope of the patent application). It is implemented as follows. (1) As a processor who arranges the flat conductors of each phase at an assembly position and punches through a plate, connects the tie bars between the flat conductors and their parent metal frame from the back, and in this state In this phase, the flat conductor tip is joined with the rod conductor to temporarily assemble the unit (item 2 of the scope of the patent application). 11 (2) Put the temporary assembly of the unit into a metal mold and use the injection molding method. This paper size applies to China National Standard (CNS) A4 Specification (210 X 297 Gong) ~ (Please read the Note 3 on the back before filling in this page) Order · _-Line · Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 457 5 0 7 a B7 V. Description of the invention (5) Insert molding (item 3 of the scope of patent application). If the above-mentioned assembly method is adopted, the connection between the flat conductor penetrating the primary conductor disposed on both sides of the zero-phase converter and the rod-shaped conductor of the zero-phase converter is first formed by resin, and then each primary conductor is implemented. The temporary assembly with the zero-phase converter is integrally molded with resin by injection molding. Therefore, the resin-sealing resin molding process of the inside of the conductor through-hole of the zero-phase converter and the junction between the conductors is also performed once. It is over, and the resin injected under pressure into the forming metal mold is evenly filled in the corners of the metal mold, so there is no gap between the primary conductors and between the conductor and the zero-phase converter. In this way, stable insulation characteristics can be obtained. [Embodiment of the invention] The embodiment of the present invention will be described below with reference to Figs. 1 and 4. Here, Figure 1 (a) (b) is the external view of the finished product of the zero-phase converter unit, and Figure 2 (a) (b) is the external view of the temporary assembly state before the resin forming process. Figure 3 is an exploded view of each part before the temporary assembly, and Nos. 4 (a) to (c) are structural diagrams showing a zero-phase converter. In each figure, 8 series zero-phase converters, 1 1R, 11S, 1 1T, and 12R, 12S * 12T are clamped respectively. Zero-phase converters 8 are arranged on both sides of R, S 'T The flat conductors of the primary conductors corresponding to the phases of the phases, 13R, 13S, 13T are connected through the primary conductor through-hole 8 a of the zero-phase converter 8 to the flat conductors 11R, 11S, 11T and 12R, 12S, 12T. (Please read the precautions on the back before filling out this page). --- Line-The consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs Du printed this paper to apply the Chinese National Standard (CNS) A4 (210 X 297) ) -8- Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 457507 A7 B7 V. Description of the invention (6) Rod conductors (round rod conductors) corresponding to r, S, τ, 1 4 (refer to Figure 1) It refers to a sealing resin formed on the periphery of an assembly of a zero-phase converter unit by injection molding. The assembly method of the zero-phase converter unit according to the present invention is described below. First, in FIG. 3, the flat conductors 1 2R '1 2 S, 1 2T' arranged on one side of the zero-phase converter 8 are each conductor 葙 placed in an assembly position from a board (base material) together with the tip. The pin holes 1 2 a of the part are punched and formed by punching. After the punching, the base material outer frame 12 b and each of the flat conductors 12R, 12S, and 1_2T are tied as shown in the figure after the punching. link. Press, this tie bar 1 2 c is cut off from the flat conductor after temporary assembly. Furthermore, the flat conductors 1 2 R '1 2 S, 1 2 T connected to the outer frame 1 2 b are used as bases, and the rod-shaped conductors 13R, 13S, and 13T are planted for the pin holes 12 a opened at the tips of the flat conductors. Here, the rod-shaped conductor passes through the primary conductor through-hole 8 a of the zero-phase converter 8. Next, from the opposite side of the zero-phase converter 8, the flat conductor 1 1 R '1 1 S' 11T is pressed against the rod-shaped conductor 13R '13S, and the 13T is pressed into the pin hole 1 1 a at the tip, and welded in this state. Join the ends of the rod-shaped conductors 1 3 R 1 13S, 13T and the flat conductors 11R, IIS, 11T, and 12R, 12S, 12T. Thereby, the temporary unit assembly shown in FIG. 2 is completed. In the assembled state shown in FIG. 2, the tie rod 12c shown in FIG. 3 is cut. According to "in the above embodiment", the flat conductors 1 1 R, 1 1 S '1 1 T located on the front side of the body in Fig. 3 can also be arranged at a predetermined assembly position and connected by a tie rod at the outer frame. This paper size applies to China National Standard (CNS) A4 specification (210 X 297 public love) -9------------- τ ^ ------ IJ Order ------ --- Line 1 * "-(Please read the notes on the back before filling out this page) 4 5? 5 〇7 A7 ------ B7 V. Description of Invention (7) Here, it will be used in this The structure of the unit zero-phase converter 8 is shown in Figs. 4 (a) to (c). That is, the zero-phase converter 8 is a package output secondary magnetic core 8 a that is covered from left and right to a two-layered shield 8 d | and has a structure embedded in a resin-made housing 8 e. In addition, the above-mentioned mask 8 d is made of cold-rolled steel sheet with high magnetic permeability as a material, and is formed by stamping and forming into a shape as shown in the figure, especially the structure of the embodiment shown in the figure. The wall thickness d 2 at the bottom of d is 1.3 times to 1.6 times the wall thickness dl of the peripheral wall portion. With this, the current magnetic flux flowing between the flat conductors sandwiching the zero-phase converter 8 superimposed on both sides will be concentrated on the thick shadow screen 8 d at the bottom > so that the outer dimension of the edge suppression radius can be high Screen effect. Next, move the temporary unit assembly of Figure 2 to the injection molding process. After inserting the temporary unit assembly of the unit into the forming metal mold, press and inject the injection molding resin into the mold to form one body *. The zero-phase current transformer unit shown as an integrated structure is thereby formed by injection, including the primary conductor through-hole 8 a of the zero-phase current transformer 8 which penetrates the rod-shaped conductors 1 3R, 1 3S, 1 3 T. The welded joints between the two ends of the flat conductor and the flat conductor. There are no gaps or gaps between the flat conductors to each corner, and the entire area of the temporary assembly of the unit is covered by the sealing resin 14. This ensures stable balance characteristics and high insulation characteristics between the zero-phase converter and the primary conductor. [Effects of the invention] As mentioned above, if the method of assembling the zero-phase converter unit of the present invention is adopted, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 2 mm) -10- (Please read the Phonetic notation? Please fill in this page again.) Order. --Line. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by 457507 Α7 Β7. In the state of bare conductors, 'the two ends of the rod-shaped conductor inserted through the zero-phase converter are bonded to the flat conductors arranged at a fixed position to temporarily assemble the unit, and then the above-mentioned unit temporary assembly' includes zero phase change The junction between the conductors inside the conductor through-hole of the current transformer uses the resin to form the entire area of the conductor. The Japanese Patent Laid-Open No. 1 0 _ 3 2 1 1 1 6 The zero-phase converter unit of the assembly structure 'will produce stable and high-quality products with balanced characteristics and insulation characteristics with low cost and good productivity. In addition, the unit assembly is integrally formed into a single body by the injection molding method. Therefore, it is not necessary to use a manual resin sealing operation, and all assembly processes can be automatically assembled by a robot arm. 6. Brief description of the diagrams Figure 1 is an oblique view of the appearance of the zero-phase converter unit after assembly, (a), (b) are the views viewed from the front side and the back side, respectively. Fig. 2 is a perspective view of the appearance of the unit temporary assembly at the stage before the resin formation shown in Fig. 1. (a) and (b) are views from the front side and the back side, respectively. FIG. 3 is an exploded perspective view of the assembly parts in FIG. 2. Figure 4 is a structural diagram of the zero-phase converter used in the unit of Figure 1, (a) is an external perspective view, (b) is an exploded perspective view, and (c) is a cross-sectional view of (b). Fig. 5 is a sectional view showing the structure of an earth leakage circuit breaker incorporating a zero-phase converter unit. This paper size is applicable to Zhongguanjia Standard (CNS) A4 specification (21Q X 297 male Γ) -11- ~ '-------- * ----- --- order, ----- I! 、 y (Please read the precautions on the back before filling out this page) 7 5 0 7 A7 ___B7 _ V. Description of the invention (9) Figure 6 is an illustration of the structure and assembly method of the conventional zero-phase converter unit (A) and (b) are oblique views of the appearance of the first half and the second half of the assembly work respectively. [Explanation of symbols] 1 breaker case, 8 zero-phase converter, 8a—secondary conductor through hole, 9 through primary conductor, (please read the precautions on the back before filling this page) -I. _ ·-~ · / ί4 / \ n In inn, 1 [1 an n ^ 1 «n I 1 verbal 11 R, 1 1 S, 1 1 T flat conductor, 1 1 b base metal frame, 11c tie rod, 12 R, 1 2 S, 1 2 T flat conductors, 13 R, 1 3 S, 1 3 T rod conductors, 1 4 Sealed resin Printed by employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is printed in accordance with China National Standard (CNS) A4 specifications (210 X 297 mm) -12-