JP2014191910A - Leakage detection tripping unit - Google Patents
Leakage detection tripping unit Download PDFInfo
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- JP2014191910A JP2014191910A JP2013064331A JP2013064331A JP2014191910A JP 2014191910 A JP2014191910 A JP 2014191910A JP 2013064331 A JP2013064331 A JP 2013064331A JP 2013064331 A JP2013064331 A JP 2013064331A JP 2014191910 A JP2014191910 A JP 2014191910A
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本発明は、外部引外し式の漏電遮断器に適用され、回路遮断器に外付けされる漏電検出引外しユニットに関する。 The present invention relates to a leakage detection trip unit applied to an external trip type earth leakage breaker and attached to a circuit breaker.
従来、漏電を検出すると電路を遮断する漏電遮断器が提案されている（例えば、特許文献１を参照）。漏電遮断器には、回路遮断器の内部に漏電検出機能を追加したものと、回路遮断器に外付けする機器に漏電検出機能を内蔵させて当該機器を回路遮断器と接続したものとがある。後者のものは外部引外し式の漏電遮断器と呼ばれ、回路遮断器に外付けされる機器は漏電検出引外しユニットと呼ばれている。 Conventionally, an earth leakage circuit breaker that interrupts an electric circuit when an earth leakage is detected has been proposed (see, for example, Patent Document 1). There are two types of earth leakage circuit breakers: one with a leakage detection function added to the inside of the circuit breaker, and one with a built-in leakage detection function in a device externally connected to the circuit breaker, which is connected to the circuit breaker. . The latter is called an external trip type earth leakage breaker, and the device externally attached to the circuit breaker is called an earth leakage detection trip unit.
一般に回路遮断器は、一端側に電源端子部が、他端側に負荷端子部がそれぞれ備えられ、両端子部間に、接点部と、引外し機構部と、接点部のオン・オフを行うハンドル機構部とを備える。また、接点部が引外し機構部により引外された際に発生するアークを消弧するグリッド部を具備したものがある。一方、漏電検出引外しユニットは、一端側に接続端子部が、他端側に負荷端子部がそれぞれ備えられ、両端子部間に、漏電検出回路と、電路となる主回路バーと、漏電検出信号により回路遮断器の引外し機構部に作用を加える引外し駆動部とを備える。外部引外し式の漏電遮断器では、回路遮断器の負荷端子部（以下、回路遮断器の接続端子部）に、漏電検出引外しユニットの接続端子部が接続される。 In general, a circuit breaker is provided with a power terminal portion on one end side and a load terminal portion on the other end side, and the contact portion, the trip mechanism portion, and the contact portion are turned on and off between both terminal portions. A handle mechanism. In addition, there is one having a grid portion that extinguishes an arc generated when the contact portion is tripped by the trip mechanism. On the other hand, the leakage detection trip unit is provided with a connection terminal part on one end side and a load terminal part on the other end side. Between the two terminal parts, a leakage detection circuit, a main circuit bar serving as an electric circuit, and leakage detection A tripping drive unit that acts on the tripping mechanism unit of the circuit breaker by a signal. In the external trip type earth leakage breaker, the connection terminal portion of the leakage detection trip unit is connected to the load terminal portion of the circuit breaker (hereinafter referred to as the connection terminal portion of the circuit breaker).
漏電検出引外しユニットによる漏電の検出には零層変流器（Zero phase Current Transformer）が使用され、このＺＣＴに主回路バーが通される。例えば３相４線の場合、ＺＣＴに４本の主回路バーが通される。通電時には、ＺＣＴを通過する往路と復路の電流の差分が検出される。漏電が生じていない場合、上記差分はゼロであるが、漏電が生じた場合、往路と復路の電流に差分が生じ当該差分を増幅して電路を遮断する。主回路バーが電線の代替となって、当該主回路バーの一端側が回路遮断器の接続端子部に端子ねじで固定されるとともに、他端側が端子板を介して漏電検出引外しユニットの負荷端子部に端子ねじで固定される。 A zero phase current transformer is used to detect a leakage by the leakage detection trip unit, and a main circuit bar is passed through the ZCT. For example, in the case of three-phase four-wire, four main circuit bars are passed through the ZCT. At the time of energization, the difference between the current in the forward path and the return path passing through the ZCT is detected. When there is no leakage, the difference is zero, but when a leakage occurs, a difference occurs in the current between the forward path and the return path, and the difference is amplified to block the circuit. The main circuit bar replaces the wires, and one end of the main circuit bar is fixed to the connection terminal of the circuit breaker with a terminal screw, and the other end is connected to the load terminal of the leakage detection trip unit via the terminal plate The terminal is fixed with terminal screws.
外部引外し式の漏電遮断器では、通電時における回路遮断器の接続端子部の温度上昇が、回路遮断器のみに対する通電時よりも大きくなり、回路遮断器の接続端子部付近にある筐体の温度上昇が大きくなる傾向にある。 In the external trip type earth leakage breaker, the temperature rise of the connection terminal part of the circuit breaker when energized is larger than that when only the circuit breaker is energized. The temperature rise tends to increase.
本発明は、このような問題点に着目してなされたものであって、その目的は、回路遮断器の接続端子部付近の温度上昇を抑制することが可能な漏電検出引外しユニットを提供することにある。 The present invention has been made paying attention to such problems, and an object thereof is to provide a leakage detection trip unit capable of suppressing a temperature rise in the vicinity of a connection terminal portion of a circuit breaker. There is.
上記課題を解決する漏電検出引外しユニットは、回路遮断器に接続される主回路バーを電路として備えた漏電検出引外しユニットであって、前記回路遮断器の接続端子部に対する接続部位である前記主回路バーの接続端子部は、当該接続端子部以外の電路よりも接触面積が大きい端子部形状を有していることをその要旨としている。 An earth leakage detection trip unit that solves the above-mentioned problem is an earth leakage detection trip unit including a main circuit bar connected to a circuit breaker as an electric circuit, and is a connection part to a connection terminal portion of the circuit breaker. The gist is that the connection terminal portion of the main circuit bar has a terminal portion shape having a larger contact area than the electric circuit other than the connection terminal portion.
上記漏電検出引外しユニットについて、前記主回路バーの接続端子部における電路の接触部形状が平面であることとしてもよい。
上記漏電検出引外しユニットについて、前記主回路バーの接続端子部の電路は、Ｕの字状からなることとしてもよい。
About the said leakage detection trip unit, the contact part shape of the electric circuit in the connecting terminal part of the said main circuit bar is good also as being a plane.
With respect to the leakage detection trip unit, the electric circuit of the connection terminal portion of the main circuit bar may have a U shape.
上記漏電検出引外しユニットについて、前記主回路バーの接続端子部における電路の経路に沿って溝を有することとしてもよい。
上記漏電検出引外しユニットについて、前記主回路バーの接続端子部は金属で構成され、電路の接触部形状が平面であるキャップ部材を前記接続端子部にかぶせることとしてもよい。
About the said leakage detection trip unit, it is good also as having a groove | channel along the path | route of the electric circuit in the connection terminal part of the said main circuit bar.
About the said leakage detection trip unit, the connection terminal part of the said main circuit bar is comprised with a metal, and it is good also as covering the said connection terminal part with the cap member whose contact part shape of an electric circuit is a plane.
上記漏電検出引外しユニットについて、前記主回路バーによる電路は、漏電検出回路の構成要素である零層変流器を貫通するＺＣＴ貫通部と、当該ＺＣＴ貫通部を挟んで前記接続端子部とは反対側の負荷端子部との間の区間で、断面積が前記ＺＣＴ貫通部よりも大きいこととしてもよい。 With respect to the leakage detection trip unit, the electric circuit by the main circuit bar includes a ZCT penetration part that penetrates a zero-layer current transformer that is a component of the leakage detection circuit, and the connection terminal part across the ZCT penetration part. It is good also as a cross-sectional area being larger than the said ZCT penetration part in the area between the load terminal parts on the opposite side.
本発明によれば、回路遮断器の接続端子部付近の温度上昇を抑制することができる。 ADVANTAGE OF THE INVENTION According to this invention, the temperature rise near the connection terminal part of a circuit breaker can be suppressed.
（第１の実施の形態）
以下、漏電検出引外しユニットの第１の実施の形態について説明する。
図１に示すように、外部引外し式の漏電遮断器は、大きく分けて回路遮断器３と漏電検出引外しユニット４とで構成される。この漏電遮断器は、回路遮断器３の電源端子部３ａ及び漏電検出引外しユニット４の負荷端子部４ａにおいて、電線１が端子ねじ２によって固定されている。複数の回路遮断器３は連接ハンドル５によって連接されている。この連接ハンドル５は、漏電検出引外しユニット４の連動ハンドル６に接続されており、漏電検出時に動作する連動ハンドル６によって連動されて、回路を遮断する。
(First embodiment)
Hereinafter, a first embodiment of the leakage detection trip unit will be described.
As shown in FIG. 1, the external trip type earth leakage breaker is roughly composed of a circuit breaker 3 and an earth leakage detection trip unit 4. In this earth leakage circuit breaker, the electric wire 1 is fixed by the terminal screw 2 in the power terminal part 3 a of the circuit breaker 3 and the load terminal part 4 a of the earth leakage detection trip unit 4. The plurality of circuit breakers 3 are connected by a connecting handle 5. This connection handle 5 is connected to the interlocking handle 6 of the leakage detection trip unit 4 and is interlocked by the interlocking handle 6 that operates when the leakage is detected, thereby interrupting the circuit.
図２に示すように、漏電検出引外しユニット４の内部には、電路となる主回路バー７が引き回され、当該主回路バー７の先端は端子板８に溶着されている。主回路バー７は４本ともＺＣＴ９を通過している。 As shown in FIG. 2, the main circuit bar 7 serving as an electric circuit is routed inside the leakage detection trip unit 4, and the tip of the main circuit bar 7 is welded to the terminal plate 8. All four main circuit bars 7 pass through the ZCT 9.
図３に示すように、主回路バー７は、一端側の接続端子部７ａが回路遮断器３の接続端子部３ｂ（図１参照）に端子ねじ２で固定され、他端側が端子板８を介して漏電検出引外しユニット４の負荷端子部４ａに端子ねじ２で固定されている。接続端子部７ａは、端子カバー１０によって保護されている。接続端子部７ａは、接触面形状が平面で形成されている。したがって、接続端子部７ａが回路遮断器３の接続端子部３ｂに端子ねじ２で固定されるとき、接続端子部７ａの平面部分が接続端子部３ｂの端子板によって挟み込まれ、これにより、接触面積が大きくなる。 As shown in FIG. 3, the main circuit bar 7 has a connection terminal portion 7 a on one end side fixed to a connection terminal portion 3 b (see FIG. 1) of the circuit breaker 3 with a terminal screw 2, and a terminal plate 8 on the other end side. The terminal screw 2 is fixed to the load terminal portion 4 a of the leakage detection trip unit 4. The connection terminal portion 7 a is protected by the terminal cover 10. The connection terminal portion 7a has a flat contact surface shape. Therefore, when the connection terminal portion 7a is fixed to the connection terminal portion 3b of the circuit breaker 3 with the terminal screw 2, the plane portion of the connection terminal portion 7a is sandwiched between the terminal plates of the connection terminal portion 3b, thereby the contact area. Becomes larger.
次に、漏電検出引外しユニット４の作用について説明する。
主回路バー７の接続端子部７ａにおける接触面形状は平面であるため、接触面積が大きくなる。これにより、接触抵抗による発熱が抑えられ、主回路バー７による電路の発熱量が少なくなる。したがって、接続端子部７ａの温度上昇値は低減される。以上のように、漏電検出引外しユニット４は、接続端子部７ａの接触面積が大きいため、接続端子部７ａの温度上昇値の低減が可能になる。
Next, the operation of the leakage detection trip unit 4 will be described.
Since the contact surface shape of the connection terminal portion 7a of the main circuit bar 7 is a flat surface, the contact area increases. Thereby, the heat generation by the contact resistance is suppressed, and the heat generation amount of the electric circuit by the main circuit bar 7 is reduced. Therefore, the temperature rise value of the connection terminal portion 7a is reduced. As described above, since the leakage detection trip unit 4 has a large contact area of the connection terminal portion 7a, the temperature rise value of the connection terminal portion 7a can be reduced.
以上説明したように、第１の実施の形態によれば、以下の効果を奏することができる。
（１）回路遮断器３の接続端子部３ｂに対する接続部位である主回路バー７の接続端子部７ａは、当該接続端子部７ａ以外の電路よりも接触面積が大きい端子部形状を有している。これにより、接続端子部７ａの接触面積が増加するので、接触抵抗による発熱が抑えられ、電路の発熱量が低減される。したがって、電路の温度上昇値は低減される。よって、回路遮断器３の接続端子部３ｂ付近の温度上昇を抑制することができる。
As described above, according to the first embodiment, the following effects can be obtained.
(1) The connection terminal part 7a of the main circuit bar 7 which is a connection part with respect to the connection terminal part 3b of the circuit breaker 3 has a terminal part shape with a larger contact area than an electric circuit other than the connection terminal part 7a. . Thereby, since the contact area of the connection terminal part 7a increases, the heat_generation | fever by contact resistance is suppressed and the emitted-heat amount of an electric circuit is reduced. Therefore, the temperature rise value of the electric circuit is reduced. Therefore, the temperature rise near the connection terminal portion 3b of the circuit breaker 3 can be suppressed.
（２）回路遮断器３の接続端子部３ｂと接する部分が平面であることから、接触面積が大きくなり、接触抵抗による発熱量を下げられる。
（３）回路遮断器３の接続端子部３ｂ付近の温度上昇が抑制されることに伴い、接続端子部３ｂを覆う蓋を別途取り付ける必要がない。つまり、当該蓋により表面温度を下げる必要がない。
(2) Since the portion in contact with the connection terminal portion 3b of the circuit breaker 3 is a flat surface, the contact area is increased and the amount of heat generated by the contact resistance can be reduced.
(3) Along with the suppression of the temperature rise in the vicinity of the connection terminal portion 3b of the circuit breaker 3, it is not necessary to separately attach a cover that covers the connection terminal portion 3b. That is, it is not necessary to lower the surface temperature with the lid.
（第２の実施の形態）
次に、漏電検出引外しユニットの第２の実施の形態について説明する。本実施の形態における漏電検出引外しユニット４は、主回路バー７の接続端子部７ａを除いては上記第１の実施の形態と同様であるから、共通する構成要素には同一の符号を付して、その説明は省略する。
(Second Embodiment)
Next, a second embodiment of the leakage detection trip unit will be described. The leakage detection trip unit 4 in the present embodiment is the same as that of the first embodiment except for the connection terminal portion 7a of the main circuit bar 7, and therefore, common constituent elements are denoted by the same reference numerals. Therefore, the description is omitted.
図４に示すように、接続端子部７ａは略Ｕの字型に形成されている。したがって、この接続端子部７ａが回路遮断器３の接続端子部３ｂに端子ねじ２で固定されるとき、接続端子部７ａのＵ字部分が接続端子部３ｂの端子板によって挟み込まれ、これにより、接触面積が大きくなる。なお、Ｕ字部分の接触面形状を平面で形成してもよい。 As shown in FIG. 4, the connection terminal portion 7 a is formed in a substantially U shape. Therefore, when the connection terminal portion 7a is fixed to the connection terminal portion 3b of the circuit breaker 3 with the terminal screw 2, the U-shaped portion of the connection terminal portion 7a is sandwiched between the terminal plates of the connection terminal portion 3b. The contact area increases. In addition, you may form the contact surface shape of a U-shaped part with a plane.
次に、漏電検出引外しユニット４の作用について説明する。
主回路バー７の接続端子部７ａはＵの字型であるため、直状との比較において接触面積が大きくなる。これにより、接触抵抗による発熱が抑えられ、主回路バー７による電路の発熱量が少なくなる。したがって、接続端子部７ａの温度上昇値は低減される。また、少ない曲げ回数で済むので、加工コストの低減も可能である。以上のように、漏電検出引外しユニット４は、接続端子部７ａの接触面積が大きくなっているため、接触抵抗による発熱は抑制される。したがって、接続端子部７ａの温度上昇値の低減が可能になる。
Next, the operation of the leakage detection trip unit 4 will be described.
Since the connection terminal portion 7a of the main circuit bar 7 is U-shaped, the contact area is increased in comparison with the straight shape. Thereby, the heat generation by the contact resistance is suppressed, and the heat generation amount of the electric circuit by the main circuit bar 7 is reduced. Therefore, the temperature rise value of the connection terminal portion 7a is reduced. In addition, since the number of bending times is small, the processing cost can be reduced. As described above, since the leakage detection trip unit 4 has a large contact area of the connection terminal portion 7a, heat generation due to contact resistance is suppressed. Therefore, the temperature rise value of the connection terminal portion 7a can be reduced.
以上説明したように、第２の実施の形態によれば、上記第１の実施の形態による（１）、（３）の効果と同様の効果に加え、以下の効果を奏することができる。
（４）主回路バー７の接続端子部７ａの電路は、Ｕの字状からなる。このため、少ない曲げ回数で接触面積を増やすことができ、温度低減ができる。
As described above, according to the second embodiment, in addition to the same effects as the effects (1) and (3) according to the first embodiment, the following effects can be achieved.
(4) The electric circuit of the connection terminal portion 7a of the main circuit bar 7 has a U shape. For this reason, the contact area can be increased with a small number of bendings, and the temperature can be reduced.
（５）接続端子部７ａをＵの字状に形成して表面積を増やすことで、電路まわりの放熱量も増加する。したがって、電路の温度上昇値を低減することができる。
（６）Ｕ字部分の接触面形状を平面で形成する場合、より接触面積が大きくなり、接触抵抗による発熱量を下げられる。
(5) By forming the connection terminal portion 7a in a U shape and increasing the surface area, the amount of heat dissipated around the electric circuit is also increased. Therefore, the temperature rise value of the electric circuit can be reduced.
(6) When the contact surface shape of the U-shaped portion is formed as a flat surface, the contact area becomes larger and the amount of heat generated by the contact resistance can be reduced.
（第３の実施の形態）
次に、漏電検出引外しユニットの第３の実施の形態について説明する。本実施の形態における漏電検出引外しユニット４は、主回路バー７の接続端子部７ａを除いては上記第１の実施の形態と同様であるから、共通する構成要素には同一の符号を付して、その説明は省略する。
(Third embodiment)
Next, a third embodiment of the leakage detection trip unit will be described. The leakage detection trip unit 4 in the present embodiment is the same as that of the first embodiment except for the connection terminal portion 7a of the main circuit bar 7, and therefore, common constituent elements are denoted by the same reference numerals. Therefore, the description is omitted.
図５に示すように、接続端子部７ａは電路の経路に沿って複数本の溝を有している。したがって、図６に示すように、電路が経路沿いに屈折していても、図７に示すように、端子ねじ２によって接続端子部３ｂの端子板に固定したとき、締め付け力によって電路は溝を中心に変形する。これによって、接続端子部７ａと接続端子部３ｂとの接触面積が大きくなる。 As shown in FIG. 5, the connecting terminal portion 7a has a plurality of grooves along the path of the electric circuit. Therefore, as shown in FIG. 6, even if the electric circuit is refracted along the path, as shown in FIG. 7, when the terminal screw 2 is fixed to the terminal plate of the connection terminal portion 3b, the electric circuit causes the groove to be sunk by the tightening force. Deforms to the center. This increases the contact area between the connection terminal portion 7a and the connection terminal portion 3b.
次に、漏電検出引外しユニット４の作用について説明する。
接続端子部７ａに溝が形成されているため、固定時の締め付け力による変形が許容される。この変形を伴いつつ接続端子部７ａが接続端子部３ｂの端子板によって挟み込まれる。これによって、接触面積が大きくなり、接触抵抗値が低下し、発熱量が低減する。以上のように、漏電検出引外しユニット４は、接続端子部７ａの接触面積が大きくなっているため、接触抵抗による発熱は抑制される。したがって、接続端子部７ａの温度上昇値の低減が可能になる。
Next, the operation of the leakage detection trip unit 4 will be described.
Since the groove is formed in the connection terminal portion 7a, deformation due to the tightening force at the time of fixation is allowed. With this deformation, the connection terminal portion 7a is sandwiched between the terminal plates of the connection terminal portion 3b. As a result, the contact area increases, the contact resistance value decreases, and the heat generation amount decreases. As described above, since the leakage detection trip unit 4 has a large contact area of the connection terminal portion 7a, heat generation due to contact resistance is suppressed. Therefore, the temperature rise value of the connection terminal portion 7a can be reduced.
以上説明したように、第３の実施の形態によれば、上記第１の実施の形態による（１）、（３）の効果と同様の効果に加え、以下の効果を奏することができる。
（７）接続端子部７ａは電路の経路に沿って溝を有する。このため、接続端子部７ａが仮に経路沿いに屈折していても、端子ねじ２による締め付け力が作用したときに溝を中心として電路が変形するので、接触面積が増えて接触抵抗値が低下し、発熱量が低減する。
As described above, according to the third embodiment, in addition to the same effects as the effects (1) and (3) according to the first embodiment, the following effects can be achieved.
(7) The connection terminal portion 7a has a groove along the path of the electric circuit. For this reason, even if the connection terminal portion 7a is refracted along the path, the electric path is deformed around the groove when the tightening force by the terminal screw 2 is applied, so that the contact area increases and the contact resistance value decreases. The calorific value is reduced.
（８）接続端子部７ａに溝を形成して表面積を増やすことで、電路まわりの放熱量も増加する。したがって、電路の温度上昇値を低減することができる。
（第４の実施の形態）
次に、漏電検出引外しユニットの第４の実施の形態について説明する。
(8) By increasing the surface area by forming a groove in the connection terminal portion 7a, the amount of heat dissipated around the electric circuit also increases. Therefore, the temperature rise value of the electric circuit can be reduced.
(Fourth embodiment)
Next, a fourth embodiment of the leakage detection trip unit will be described.
図８に示すように、本実施の形態における漏電検出引外しユニット４は、接続端子部７ａに先端キャップ１１がかぶせられている。なお、先端キャップ１１が備わっている点を除いては上記第１の実施の形態と同様であるから、共通する構成要素には同一の符号を付して、その説明は省略する。 As shown in FIG. 8, the leakage detection trip unit 4 in the present embodiment has a tip cap 11 covering the connection terminal portion 7a. In addition, since it is the same as that of the said 1st Embodiment except the point provided with the front-end | tip cap 11, the same code | symbol is attached | subjected to a common component and the description is abbreviate | omitted.
図９に示すように、接続端子部７ａは金属で構成され、電路の接触部形状が平面である先端キャップ１１が接続端子部７ａにかぶせるような形で備えられている。この先端キャップ１１も金属等の導電性材料によって構成されている。したがって、回路遮断器３の接続端子部３ｂに固定されるとき、先端キャップ１１の平面部分が接続端子部３ｂの端子板によって挟み込まれ、これにより、接触面積が大きくなる。つまり、接続端子部７ａが細くても、先端キャップ１１によって接触面積が大きくなる。 As shown in FIG. 9, the connection terminal portion 7a is made of metal, and is provided in such a shape that a tip cap 11 having a flat contact portion shape of the electric circuit covers the connection terminal portion 7a. The tip cap 11 is also made of a conductive material such as metal. Therefore, when it fixes to the connection terminal part 3b of the circuit breaker 3, the plane part of the front-end | tip cap 11 is inserted | pinched by the terminal board of the connection terminal part 3b, and, thereby, a contact area becomes large. That is, even if the connection terminal portion 7 a is thin, the contact area is increased by the tip cap 11.
次に、漏電検出引外しユニット４の作用について説明する。
接続端子部７ａにかぶせられる先端キャップ１１の接触部形状は平面であるため、接続端子部７ａが細くても、接触面積が大きくなる。これにより、接触抵抗による発熱量が少なく、接続端子部７ａの温度上昇値は低減される。以上のように、漏電検出引外しユニット４は、先端キャップ１１によって間接的に接続端子部７ａの接触面積が大きいので、接続端子部７ａの温度上昇値の低減が可能になる。
Next, the operation of the leakage detection trip unit 4 will be described.
Since the shape of the contact portion of the tip cap 11 that covers the connection terminal portion 7a is a flat surface, the contact area increases even if the connection terminal portion 7a is thin. Thereby, there is little calorific value by contact resistance, and the temperature rise value of the connecting terminal part 7a is reduced. As described above, since the leakage detection trip unit 4 has a large contact area of the connection terminal portion 7a indirectly by the tip cap 11, the temperature rise value of the connection terminal portion 7a can be reduced.
以上説明したように、第４の実施の形態によれば、上記第１の実施の形態による（１）〜（３）の効果と同様の効果に加え、以下の効果を奏することができる。
（９）先端キャップ１１により、回路遮断器３の接続端子部３ｂとの接触面積が増加するので、接触抵抗による発熱量が低減される。
As described above, according to the fourth embodiment, in addition to the same effects as the effects (1) to (3) according to the first embodiment, the following effects can be achieved.
(9) Since the contact area with the connection terminal portion 3b of the circuit breaker 3 is increased by the tip cap 11, the amount of heat generated by the contact resistance is reduced.
（１０）接続端子部７ａに先端キャップ１１をかぶせて表面積を増やすことで、電路まわりの放熱量も増加する。したがって、電路の温度上昇値を低減することができる。
（第５の実施の形態）
次に、漏電検出引外しユニットの第５の実施の形態について説明する。
(10) By covering the connection terminal portion 7a with the tip cap 11 and increasing the surface area, the amount of heat dissipated around the electric circuit also increases. Therefore, the temperature rise value of the electric circuit can be reduced.
(Fifth embodiment)
Next, a fifth embodiment of the leakage detection trip unit will be described.
図１０に示すように、本実施の形態における漏電検出引外しユニット４は、主回路バー７について、ＺＣＴ９を貫通するＺＣＴ貫通部と端子板８との間の区間で、断面積がＺＣＴ貫通部よりも大きい。なお、当該区間の断面積が大きい点を除いては上記第１の実施の形態と同様であるから、共通する構成要素には同一の符号を付して、その説明は省略する。 As shown in FIG. 10, the leakage detection trip unit 4 in the present embodiment is a section between the ZCT penetrating portion that penetrates the ZCT 9 and the terminal plate 8 with respect to the main circuit bar 7, and the cross-sectional area is the ZCT penetrating portion. Bigger than. In addition, since it is the same as that of the said 1st Embodiment except the point where the cross-sectional area of the said area is large, the same code | symbol is attached | subjected to a common component and the description is abbreviate | omitted.
次に、漏電検出引外しユニット４の作用について説明する。
電路となる主回路バー７は、ＺＣＴ９を貫通するＺＣＴ貫通部と端子板８との間の区間で、断面積が大きい。したがって、主回路バー７の断面積が大きくなり、発熱量が少なくなり、接続端子部７ａの温度上昇値は低減される。以上のように、漏電検出引外しユニット４は、ＺＣＴ貫通部と端子板８との間の区間での断面積が大きくなっており、通電時における主回路バー７の発熱量は低減される。したがって、接続端子部７ａの温度上昇値の低減が可能になる。
Next, the operation of the leakage detection trip unit 4 will be described.
The main circuit bar 7 serving as an electric circuit has a large cross-sectional area in a section between the ZCT penetrating portion that penetrates the ZCT 9 and the terminal plate 8. Therefore, the cross-sectional area of the main circuit bar 7 is increased, the amount of heat generation is reduced, and the temperature rise value of the connection terminal portion 7a is reduced. As described above, the leakage detection trip unit 4 has a large cross-sectional area in the section between the ZCT penetrating portion and the terminal plate 8, and the amount of heat generated by the main circuit bar 7 during energization is reduced. Therefore, the temperature rise value of the connection terminal portion 7a can be reduced.
以上説明したように、第５の実施の形態によれば、上記第１の実施の形態による（１）〜（３）の効果と同様の効果に加え、以下の効果を奏することができる。
（１１）ＺＣＴ９と負荷端子部４ａ（端子板８が接続される箇所）との間にある電路の断面積を大きくできるため、電路全体の端子間抵抗が小さくなり、発熱量の低減が可能になる。
As described above, according to the fifth embodiment, in addition to the same effects as the effects (1) to (3) according to the first embodiment, the following effects can be achieved.
(11) Since the cross-sectional area of the electric circuit between the ZCT 9 and the load terminal portion 4a (where the terminal plate 8 is connected) can be increased, the inter-terminal resistance of the entire electric circuit is reduced, and the amount of heat generation can be reduced. Become.
（１２）ＺＣＴ９のサイズを電路の断面積に応じて変更せずに接触抵抗による発熱を低減可能である。つまり、ＺＣＴ９の部品共通化が可能となる。
（１３）電路の断面積を大きくして表面積を増やすことで、電路まわりの放熱量も増加する。したがって、電路の温度上昇値を低減することができる。
(12) Heat generation due to contact resistance can be reduced without changing the size of the ZCT 9 according to the cross-sectional area of the electric circuit. That is, ZCT9 parts can be shared.
(13) By increasing the cross-sectional area of the electric circuit and increasing the surface area, the amount of heat released around the electric circuit is also increased. Therefore, the temperature rise value of the electric circuit can be reduced.
なお、上記各実施の形態は、次のように変更して具体化することも可能である。
・第５の実施の形態における電路の断面積を大きくする構成を各実施の形態に適用してもよい。各実施の形態に倣い主回路バー７の接続端子部７ａの接触面積を大きくしつつ、第５の実施の形態に倣い主回路バー７におけるＺＣＴ貫通部と端子板８との間の区間の断面積を大きくすることで、より電路の発熱量が低減される。
Each of the above embodiments can be modified and embodied as follows.
-You may apply the structure which enlarges the cross-sectional area of the electric circuit in 5th Embodiment to each embodiment. In accordance with each embodiment, the contact area of the connection terminal portion 7a of the main circuit bar 7 is increased, and the section between the ZCT penetrating portion and the terminal plate 8 in the main circuit bar 7 according to the fifth embodiment is cut. By increasing the area, the amount of heat generated in the electric circuit is further reduced.
・各実施の形態による主回路バー７の接続端子部７ａの接触面積を大きくする構成を適宜組み合わせてもよい。
・複数本の主回路バー７について、電流量等に応じて接続端子部７ａの形状を異ならせてもよい。同様に、ＺＣＴ貫通部と端子板８との間の区間の断面積を異ならせてもよい。
-You may combine suitably the structure which enlarges the contact area of the connection terminal part 7a of the main circuit bar 7 by each embodiment.
-About the multiple main circuit bar 7, you may vary the shape of the connection terminal part 7a according to electric current amount. Similarly, the cross-sectional area of the section between the ZCT penetrating portion and the terminal board 8 may be varied.
１…電線、２…端子ねじ、３…回路遮断器、３ａ…電源端子部、３ｂ…接続端子部、４…漏電検出引外しユニット、４ａ…負荷端子部、５…連接ハンドル、６…連動ハンドル、７…主回路バー、７ａ…接続端子部、８…端子板、９…ＺＣＴ、１０…端子カバー、１１…先端キャップ（キャップ部材）。 DESCRIPTION OF SYMBOLS 1 ... Electric wire, 2 ... Terminal screw, 3 ... Circuit breaker, 3a ... Power supply terminal part, 3b ... Connection terminal part, 4 ... Leakage detection trip unit, 4a ... Load terminal part, 5 ... Connection handle, 6 ... Interlock handle , 7 ... main circuit bar, 7a ... connection terminal portion, 8 ... terminal plate, 9 ... ZCT, 10 ... terminal cover, 11 ... tip cap (cap member).
Claims (6)
前記回路遮断器の接続端子部に対する接続部位である前記主回路バーの接続端子部は、当該接続端子部以外の電路よりも接触面積が大きい端子部形状を有している
ことを特徴とする漏電検出引外しユニット。 An earth leakage detection trip unit having a main circuit bar connected to a circuit breaker as an electric circuit,
The connection terminal part of the main circuit bar, which is a connection part to the connection terminal part of the circuit breaker, has a terminal part shape having a larger contact area than the electric circuit other than the connection terminal part. Detection trip unit.
請求項１に記載の漏電検出引外しユニット。 The leakage detection trip unit according to claim 1, wherein a contact portion shape of the electric circuit in the connection terminal portion of the main circuit bar is a plane.
請求項１又は２に記載の漏電検出引外しユニット。 The electric leakage detection trip unit according to claim 1 or 2, wherein the electric circuit of the connection terminal portion of the main circuit bar has a U-shape.
請求項１〜３のいずれか一項に記載の漏電検出引外しユニット。 The leakage detection trip unit according to any one of claims 1 to 3, further comprising a groove along a path of the electric circuit in the connection terminal portion of the main circuit bar.
請求項１に記載の漏電検出引外しユニット。 The leakage detection trip unit according to claim 1, wherein the connection terminal portion of the main circuit bar is made of metal, and a cap member having a flat contact portion shape of the electric circuit is placed on the connection terminal portion.
請求項１〜５のいずれか一項に記載の漏電検出引外しユニット。 The electric circuit by the main circuit bar includes a ZCT penetrating portion that penetrates a zero-layer current transformer that is a component of the leakage detection circuit, and a load terminal portion on the opposite side of the connecting terminal portion across the ZCT penetrating portion. The leakage detection trip unit according to any one of claims 1 to 5, wherein a cross-sectional area is larger than the ZCT penetrating portion in a section therebetween.
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| JP2013064331A JP2014191910A (en) | 2013-03-26 | 2013-03-26 | Leakage detection tripping unit |
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| JP2013064331A JP2014191910A (en) | 2013-03-26 | 2013-03-26 | Leakage detection tripping unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017064852A1 (en) * | 2015-10-15 | 2017-04-20 | パナソニックＩｐマネジメント株式会社 | Protection cover, breaker, electric leakage detection device, and electric leakage protection device |
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