JP2012119139A - Lead wire connector of high-voltage cutout fuse - Google Patents

Lead wire connector of high-voltage cutout fuse Download PDF

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JP2012119139A
JP2012119139A JP2010267244A JP2010267244A JP2012119139A JP 2012119139 A JP2012119139 A JP 2012119139A JP 2010267244 A JP2010267244 A JP 2010267244A JP 2010267244 A JP2010267244 A JP 2010267244A JP 2012119139 A JP2012119139 A JP 2012119139A
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lead wire
connector
fusible body
fuse
cutout fuse
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JP5587752B2 (en
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Masatoshi Araya
正敏 新家
Masaya Nishibayashi
政哉 西林
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OSAKA FUSE CO Ltd
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OSAKA FUSE CO Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a connector of a high-voltage cutout fuse, having reduced weight to reduce and disperse emissions on cutting off a large current, improving a stopper effect by the connector itself, and serving also as a fixing plate for preventing a change in fusion characteristics due to a contact of a fusible body to an arc-extinguishing tube.SOLUTION: There is provided a connector of a high-voltage cutout fuse formed by providing a fusible body between a head terminal and a lead wire in a stretched manner, and entirely covering the fuse with an arc-extinguishing tube. The connector for connecting between the fusible body and the lead wire includes an enlarged diameter portion expanding radially outward. This enlarged diameter portion serves as both a stopper and a fixing plate.

Description

この発明は、高圧配電線路において、高圧カットアウトスイッチに装着され、柱上変圧器を保護するために使用する高圧カットアウトヒューズに関し、特に可溶体とリード線を接続する接続具の改良に関するものである。   The present invention relates to a high-voltage cutout fuse that is attached to a high-voltage cutout switch and used to protect a pole transformer in a high-voltage distribution line, and particularly relates to an improvement of a connector for connecting a fusible body and a lead wire. is there.

周知の通り、高圧カットアウトヒューズは可溶体を頭部端子とリード線間に張設し、全体を消弧チューブで被覆してなるもので、可溶体としては低融点合金の可溶部とこの可溶部の両端に接続され、頭部端子及びリード線に接続される抵抗線によって構成されるほか（特許文献１）、低融点合金の可溶部とこの可溶部の両端に接続された抵抗管と、この可溶部及び抵抗管を貫通して頭部端子及びリード線に接続した抗張力線からなるいわゆる複合ヒューズなどがある（特許文献２）。   As is well known, a high-voltage cutout fuse has a fusible body stretched between a head terminal and a lead wire, and is entirely covered with an arc extinguishing tube. In addition to being connected to both ends of the fusible part and composed of resistance wires connected to the head terminal and lead wire (Patent Document 1), the fusible part of the low melting point alloy and the fusible part were connected to both ends of the fusible part. There is a so-called composite fuse composed of a resistance tube and a tensile wire penetrating the fusible portion and the resistance tube and connected to a head terminal and a lead wire (Patent Document 2).

可溶体をリード線に接続する場合、上記いずれの場合においても通常、金属製の圧着スリーブが用いられており、可溶体とリード線を挿入して圧着することによって接続していた。また、可溶体の溶断時に可溶部が消弧チューブに接触すると、溶断時間が長くなることにより、消弧チューブの焼損や保護機器である変圧器の劣化が発生するおそれがあるので、特許文献２及び特許文献３に示されるように、可溶部に絶縁物で形成された固定板を取り付けて可溶部と消弧チューブが接触するのを防止していた。   When the fusible body is connected to the lead wire, a metal crimp sleeve is usually used in any of the above cases, and the fusible body and the lead wire are inserted and crimped. In addition, if the fusible part comes into contact with the arc extinguishing tube during the melting of the fusible body, the fusing time becomes longer, which may cause burnout of the arc extinguishing tube or deterioration of the transformer as a protective device. 2 and Patent Document 3, a fixing plate made of an insulating material is attached to the fusible part to prevent the fusible part and the arc extinguishing tube from contacting each other.

また、ヒューズ動作時においてリード線がヒューズ筒外部に垂下して感電事故の危険性がある点に鑑み、特許文献４、特許文献５に示されるようにリード線垂下防止用のストッパーを設けるのが通常である。   Also, in view of the danger of electric shock due to the lead wires hanging down outside the fuse cylinder during fuse operation, it is necessary to provide a stopper for preventing lead wire drooping as shown in Patent Document 4 and Patent Document 5. It is normal.

図１２、図１３は、これら従来例の一例を示すもので、可溶体１を頭部端子２とリード線３間に張設し、全体を消弧チューブ４で被覆した高圧カットアウトヒューズを示している。可溶体１は低融点合金の可溶部１ａとこの可溶部１ａの両端に接続され、頭部端子２及びリード線３に接続される抵抗線１ｂからなっている。抵抗線１ｂとリード線３を接続する接続具５は、金属製の圧着スリーブが用いられ、抵抗線１ｂとリード線３を挿入して圧着接続していた。６は可溶部に取り付けた絶縁物で形成された固定板である。   FIGS. 12 and 13 show examples of these conventional examples, showing a high-voltage cutout fuse in which a fusible body 1 is stretched between a head terminal 2 and a lead wire 3 and is entirely covered with an arc-extinguishing tube 4. ing. The fusible body 1 includes a fusible portion 1 a of a low melting point alloy and resistance wires 1 b connected to both ends of the fusible portion 1 a and connected to the head terminal 2 and the lead wire 3. The connection tool 5 for connecting the resistance wire 1b and the lead wire 3 is a metal crimp sleeve, and the resistance wire 1b and the lead wire 3 are inserted and crimped. Reference numeral 6 denotes a fixed plate formed of an insulator attached to the fusible portion.

図１２においては消弧チューブ４の開口端部近傍において筒壁を内方に嵌入させてストッパー７を形成し、可溶体の溶断時、接続具５がこのストッパー７によって突出を阻止されることにより、リード線３の垂下を防止する手段としている。図１３においては、接続具４下方のリード線３に銅製の板状又は管状のストッパー８を取り付け、可溶体の溶断時、このストッパー８が高圧カットアウトヒューズの表示筒先端部に形成された切り欠き溝に係止されるようにしてリード線垂下防止手段としている。   In FIG. 12, a stopper 7 is formed by fitting a cylindrical wall in the vicinity of the opening end of the arc extinguishing tube 4, and when the fusible member is melted, the connecting member 5 is prevented from protruding by the stopper 7. The lead wire 3 is prevented from drooping. In FIG. 13, a copper plate-like or tubular stopper 8 is attached to the lead wire 3 below the connector 4, and when the fusible member is melted, this stopper 8 is formed at the tip of the display cylinder of the high-voltage cutout fuse. The lead wire drooping prevention means is provided so as to be locked in the notch groove.

しかしながら、このような接続具においては、ヒューズが大電流で遮断した際、塊となり高圧カットアウトの外へ放出される恐れがあった。また放出物を軽減するため小さくすると小電流遮断時にリード線端部がストッパーで止まらず充電部が高圧カットアウトの外にはみ出し、作業者が感電する恐れがあった。 ストッパーを接続具とは別途にリード線に取り付けた構造では、コスト的に高くまた、大電流遮断時に同様の塊の放出があり至近距離での安全性に劣っていた。
また、可溶部と消弧チューブが接触するのを防止するため可溶部に絶縁物で形成された固定板を取り付ける構成は、別部品としての固定板を必要とするため部品点数が増え、コストアップ要因となっていた。 However, in such a connection tool, when the fuse is interrupted by a large current, there is a risk that the fuse becomes a lump and is discharged out of the high-voltage cutout. Also, if the size is reduced to reduce the emission, the end of the lead wire does not stop at the stopper when a small current is interrupted, and the charged part protrudes outside the high voltage cutout, which may cause an electric shock to the operator. In the structure in which the stopper is attached to the lead wire separately from the connection tool, the cost is high, and a similar lump is released when a large current is interrupted, resulting in poor safety at close range.
In addition, in order to prevent the fusible part and the arc extinguishing tube from coming into contact with each other, the structure for attaching the fixing plate formed of an insulator to the fusible part requires a fixing plate as a separate part, and the number of parts increases. It was a cost increase factor.

実公平2-45960Reality 2-45960 実公平4-43954Reality 4-43954 実開昭57-19852Shokai 57-19852 実開昭60-71056Shokai 60-71056 実公昭56-2092556-20925 Jiko

そこで、この発明の目的とするところは、接続具を軽量化して大電流遮断時の放出物の削減と分散化を図ると共に、接続具自体によってストッパー効果を上げ、さらに可溶体の消弧チューブへの接触による溶断特性の変化を防止する固定板の役目をも果たさせることにより、別個の部品を必要とせず、作業性に富む安価な高圧カットアウトヒューズのリード線の接続具を提供するところにある。   Therefore, the object of the present invention is to reduce the weight of the connection tool to reduce and disperse the discharge when a large current is interrupted, and to increase the stopper effect by the connection tool itself, and further to the arc extinguishing tube of the fusible body. By providing the fixing plate that prevents the fusing characteristics from changing due to contact, it is possible to provide an inexpensive high-voltage cutout fuse lead wire connector that does not require separate parts and is highly workable. It is in.

上記目的達成のため、この発明においては、可溶体を頭部端子とリード線間に張設し、全体を消弧チューブで被覆してなる高圧カットアウトヒューズにおいて、可溶体とリード線を接続する接続具に半径方向外側に広がる大径部を形成したことを特徴としている。
すなわち、従来のように接続具とは別個に固定板やストッパーを設けるのではなく、接続具自体に半径方向外側に広がる大径部を形成することにより固定板の機能とストッパーの機能をも兼備した接続具としたものである。 To achieve the above object, in the present invention, a fusible body is stretched between a head terminal and a lead wire, and the fusible body and the lead wire are connected in a high voltage cutout fuse formed by covering the whole with an arc extinguishing tube. The connecting tool is characterized in that a large-diameter portion extending radially outward is formed.
In other words, the fixing plate and the stopper are not provided separately from the connecting device as in the conventional case, but the connecting plate itself has the function of the fixing plate and the stopper by forming a large diameter portion extending radially outward. This is a connection tool.

接続具は薄い金属管や板で形成すれば大電流遮断時に容易に分散して膨出物の質量を低減することができる。
接続具に半径方向外側に広がる大径部を形成する手段としては、可溶体とリード線を接続する接続部をスリーブ状とした場合、その端部において接続部を拡開した大径部とするにはヘッダー加工などの塑性変形加工によって容易に製作可能である。 If the connector is formed of a thin metal tube or plate, it can be easily dispersed when a large current is interrupted to reduce the mass of the bulge.
As a means for forming a large-diameter portion that spreads radially outward in the connection tool, when the connection portion that connects the fusible body and the lead wire is formed into a sleeve shape, the large-diameter portion is formed by expanding the connection portion at the end. Can be easily manufactured by plastic deformation processing such as header processing.

また、板状体を用い、スリーブ状に成形して接続部とする場合、該接続部のリード線側端部において放射状に広がる拡開翼を形成することによって大径部を構成することもできる。これは接続部端部をプレス加工することにより容易に製作可能である。   In addition, when a plate-like body is used and formed into a sleeve shape to form a connection portion, the large-diameter portion can also be configured by forming spreading blades that radiate radially at the lead wire side end of the connection portion. . This can be easily manufactured by pressing the end of the connecting portion.

また、接続部と大径部を線材を用いて成形することも可能である。すなわち、線材をらせんコイル状に屈曲して接続部を構成した場合、該接続部のリード線側端部において巻径を大きくしたコイル状部として大径部を構成するものであり、例えば、バネ製作機械などにより、コイルバネを製作する要領で製作すれば良く、容易に製作可能である。
接続部における可溶体とリード線の接続に際しては両者を圧着後、低融点の半田合金で補強するのが望ましい。 Moreover, it is also possible to shape | mold a connection part and a large diameter part using a wire. That is, when a connecting portion is formed by bending a wire rod into a spiral coil shape, a large-diameter portion is formed as a coiled portion having an increased winding diameter at the lead wire side end portion of the connecting portion. What is necessary is just to manufacture with the manufacturing machine etc. in the procedure which manufactures a coil spring, and can manufacture easily.
When connecting the fusible member and the lead wire in the connection portion, it is desirable to reinforce them with a low melting point solder alloy after pressure bonding.

この発明の高圧カットアウトヒューズは、上述のように、可溶体を頭部端子とリード線間に張設し、全体を消弧チューブで被覆してなる高圧カットアウトヒューズにおいて、可溶体とリード線を接続する接続具に半径方向外側に広がる大径部を形成することにより、この大径部に固定板の機能とストッパーの機能とを兼備させたものであるから、部品点数を削減してコストダウンを図り得るとともに大径部によるストッパー機能によりストッパー効果を向上し得るものである。
また、接続具と固定板とストッパーを一部材で構成するものであるから、製作時における作業性の向上にも寄与するものである。 As described above, the high-voltage cutout fuse of the present invention is a high-voltage cutout fuse in which a fusible body is stretched between a head terminal and a lead wire, and the whole is covered with an arc extinguishing tube. By forming a large-diameter portion that spreads radially outward in the connecting tool that connects the two, the large-diameter portion has both the function of a fixed plate and the function of a stopper. The stopper effect can be improved by the stopper function by the large diameter portion as well as down.
In addition, since the connecting tool, the fixing plate, and the stopper are formed of a single member, this contributes to an improvement in workability during production.

本発明に係る高圧カットアウトヒューズの一実施形態を示す断面図Sectional drawing which shows one Embodiment of the high voltage | pressure cutout fuse which concerns on this invention 図１におけるＸ−Ｘ線断面図XX sectional view in FIG. 同高圧カットアウトヒューズの溶断後の状態を示す断面図Sectional view showing the high-voltage cutout fuse after melting 同高圧カットアウトヒューズの接続具の一実施形態を示す正面図The front view which shows one Embodiment of the connector of the high voltage | pressure cutout fuse 同接続具の右側面図Right side view of the connector 同高圧カットアウトヒューズの接続具の他の実施形態を示す正面図The front view which shows other embodiment of the connector of the high voltage | pressure cutout fuse 同接続具の右側面図Right side view of the connector 同高圧カットアウトヒューズの接続具のさらに他の実施形態を示す正面図The front view which shows other embodiment of the connector of the high voltage | pressure cutout fuse 同接続具の右側面図Right side view of the connector 可溶体とリード線の接続状態を示す一部正面図Partial front view showing the connection between the fusible element and the lead wire 同高圧カットアウトヒューズの溶断後の状態を示す断面図Sectional view showing the high-voltage cutout fuse after melting 従来の高圧カットアウトヒューズの一例を示す断面図Sectional view showing an example of a conventional high-voltage cutout fuse 従来の他の高圧カットアウトヒューズの一例を示す断面図Sectional view showing an example of another conventional high-voltage cutout fuse

図１乃至図３は本発明に係る接続具を使用した高圧カットアウトヒューズの一実施形態を示すもので、可溶体１を頭部端子２とリード線３間に張設し、全体を消弧チューブ４で被覆した高圧カットアウトヒューズであり、可溶体１は低融点合金の可溶部１ａとこの可溶部１ａの両端に接続され、頭部端子２及びリード線３に接続される抵抗線１ｂからなっている。   1 to 3 show an embodiment of a high-voltage cutout fuse using a connector according to the present invention. A fusible body 1 is stretched between a head terminal 2 and a lead wire 3, and the whole is extinguished. A high-voltage cutout fuse covered with a tube 4, a fusible body 1 is connected to a fusible part 1 a of a low melting point alloy and both ends of the fusible part 1 a, and a resistance wire connected to a head terminal 2 and a lead wire 3. It consists of 1b.

可溶体１とリード線３を接続する接続具５は、図４、図５に示す通り、接続部５ａをスリーブ状とし、その端部において接続部を拡開した大径部５ｂを形成している。この大径部はヘッダー加工などの塑性変形加工によって容易に製作可能である。
７は消弧チューブ４の開口端部近傍において筒壁を内方に嵌入させて形成したストッパーである。可溶体１とリード線３は、接続部５ａにおいて圧着接続されている。 As shown in FIG. 4 and FIG. 5, the connector 5 for connecting the fusible body 1 and the lead wire 3 has a connecting portion 5 a in a sleeve shape and forms a large diameter portion 5 b in which the connecting portion is expanded at the end. Yes. This large diameter portion can be easily manufactured by plastic deformation processing such as header processing.
Reference numeral 7 denotes a stopper formed by fitting a cylindrical wall in the vicinity of the opening end of the arc extinguishing tube 4. The fusible body 1 and the lead wire 3 are crimped and connected at the connection portion 5a.

可溶体１が溶断した場合、図３に例示するように接続具５の大径部５ｂがストッパー７によって確実に阻止されリード線がヒューズ筒外部に垂下するのを完全に防止することができる。
また、大径部５ｂは従来の固定板の機能も兼備しており、可溶体の消弧チューブへの接触による溶断特性の変化を防止する効果も有するものである。 When the fusible body 1 is blown, the large diameter portion 5b of the connector 5 is reliably blocked by the stopper 7 as illustrated in FIG. 3, and the lead wire can be completely prevented from drooping outside the fuse cylinder.
Moreover, the large diameter part 5b has the function of the conventional fixing plate, and has the effect which prevents the change of the fusing characteristic by the contact to the arc-extinguishing tube of a soluble body.

図６及び図７は接続具の他の実施形態を示すもので、板状体を用い、スリーブ状に成形して接続部５ａとなし、該接続部のリード線側端部において放射状に広がる拡開翼５ｃを形成することによって大径部と構成したものである。これは接続部端部をプレス加工することにより容易に製作可能である。   FIG. 6 and FIG. 7 show other embodiments of a connection tool. A plate-like body is used, and it is formed into a sleeve shape to form a connection portion 5a, which expands radially at the lead wire side end of the connection portion. A large-diameter portion is formed by forming the open blade 5c. This can be easily manufactured by pressing the end of the connecting portion.

図８及び図９は接続具のさらに他の実施形態を示すもので、この例では線材を用いて曲げ加工を行い接続具を構成している。すなわち、線材をらせんコイル状に屈曲して接続部５ａとなし、該接続部のリード線側端部において巻径を大きくしたコイル状部として大径部５ｂを構成したものである。このような接続具はバネ製作機械などにより、コイルバネを製作する要領で製作すれば良く、容易に製作可能である。
接続部５ａにおける可溶体１とリード線３の接続に際しては両者を圧着後、低融点の半田合金で補強するのが望ましい。
図１１は可溶体の溶断時の状態を示したもので、このような接続具においても大径部５ｂがストッパーと固定板の機能を十全に果たし得るものである。 8 and 9 show still another embodiment of the connection tool. In this example, the connection tool is configured by bending using a wire. That is, the wire rod is bent into a spiral coil shape to form the connection portion 5a, and the large-diameter portion 5b is configured as a coil-shaped portion having an increased winding diameter at the lead wire side end portion of the connection portion. Such a connector may be manufactured easily by a spring manufacturing machine or the like in the manner of manufacturing a coil spring.
When connecting the fusible body 1 and the lead wire 3 in the connecting portion 5a, it is desirable to press the both together and then reinforce them with a low melting point solder alloy.
FIG. 11 shows a state when the fusible body is blown, and even in such a connection tool, the large-diameter portion 5b can fully perform the functions of the stopper and the fixing plate.

図１の実施形態に係る高圧カットアウトヒューズについて溶断時の放出物の１固体の最大質量と図１２の従来の高圧カットアウトヒューズにおける溶断時の放出物の１固体の最大質量（ｍｇ）とを比較した。
従来の接続具の大きさは、外径４ｍｍ、内径２．３ｍｍ、長さ１０ｍｍ、重量６７７ｍｇ、本発明品の接続具の大きさは、外径３ｍｍ、長さ１０ｍｍ、重量１１０ｍｇ、接続部の肉厚０．１３ｍｍ、大径部の外径６ｍｍであり、いずれも銅製でニッケルメッキを施している。
ヒューズ定格は５０ｋＶＡ（１１．９Ａ）、試験条件は７２００Ｖ、８００Ａ、力率３５％で各々３個の試験品について比較したところ表１の結果が得られた。Ａが本発明品、Ｂが従来品である。この結果から、本発明品においては放出物が極端に少ないことが分る。 For the high-voltage cutout fuse according to the embodiment of FIG. 1, the maximum mass of one solid of emission at the time of fusing and the maximum mass (mg) of one solid of emission at the time of fusing in the conventional high-voltage cutout fuse of FIG. Compared.
The size of the conventional connector is 4 mm in outer diameter, 2.3 mm in inner diameter, 10 mm in length, 677 mg in weight, and the size of the connector in the present invention is 3 mm in outer diameter, 10 mm in length, 110 mg in weight, The wall thickness is 0.13 mm and the outer diameter of the large diameter portion is 6 mm, both of which are made of copper and nickel-plated.
When the fuse ratings were 50 kVA (11.9 A), the test conditions were 7200 V, 800 A, and the power factor was 35%, three test products were compared, and the results shown in Table 1 were obtained. A is a product of the present invention, and B is a conventional product. From this result, it can be seen that the present invention product has extremely few emissions.

Figure 2012119139
Figure 2012119139

１ 可溶体
１ａ 可溶部
１ｂ 抵抗線
２ 頭部端子
３ リード線
４ 消弧チューブ
５ 接続具
５ａ 接続部
５ｂ 大径部
５ｃ 拡翼部 DESCRIPTION OF SYMBOLS 1 Soluble body 1a Soluble part 1b Resistance wire 2 Head terminal 3 Lead wire 4 Arc extinguishing tube 5 Connection tool 5a Connection part 5b Large diameter part 5c Expansion part

Claims (4)

可溶体を頭部端子とリード線間に張設し、全体を消弧チューブで被覆してなる高圧カットアウトヒューズにおいて、可溶体とリード線を接続する接続具に半径方向外側に広がる大径部を形成したことを特徴とする高圧カットアウトヒューズのリード線接続具。   In a high-voltage cutout fuse in which a fusible body is stretched between the head terminal and the lead wire and is entirely covered with an arc extinguishing tube, the large-diameter portion that extends radially outward to the connector that connects the fusible body and the lead wire A lead wire connector for a high-voltage cutout fuse, characterized in that is formed. 前記接続具が可溶体とリード線を接続するスリーブ状の接続部と該接続部の
リード線側端部において接続部を拡開した大径部とからなる請求項１記載の高
圧カットアウトヒューズのリード線接続具。 2. The high-voltage cutout fuse according to claim 1, wherein the connector comprises a sleeve-like connecting portion for connecting a fusible body and a lead wire, and a large-diameter portion having an enlarged connecting portion at a lead wire side end portion of the connecting portion. Lead wire fittings. 前記接続具が可溶体とリード線を接続するスリーブ状の接続部と該接続部の
リード線側端部において形成した放射状に広がる拡開翼とからなる請求項１記
載の高圧カットアウトヒューズのリード線接続具。 2. The high-voltage cutout fuse according to claim 1, wherein the connector includes a sleeve-like connecting portion for connecting the fusible body and the lead wire, and a radially expanding wing formed at a lead wire side end portion of the connecting portion. Lead wire connector. 前記接続具が可溶体とリード線を接続するらせんコイル状に屈曲した接続部
と、該接続部のリード線側端部において巻径を大きくしたらせんコイル状部と
からなる請求項１記載の高圧カットアウトヒューズのリード線接続具。 The high voltage according to claim 1, wherein the connector comprises: a connection portion bent in a spiral coil shape for connecting a fusible body and a lead wire; and a spiral coil shape portion having a larger winding diameter at an end portion on the lead wire side of the connection portion. Cutout fuse lead wire connector.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020061334A (en) * 2018-10-12 2020-04-16 エナジーサポート株式会社 Fuse for high pressure cutter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727530A (en) * 1980-07-25 1982-02-13 Kansai Electric Power Co High voltage cutout fuse
JPS60162357U (en) * 1984-04-05 1985-10-28 大阪ヒユ−ズ株式会社 High voltage cut-out fuse
JPS61190652U (en) * 1985-05-20 1986-11-27

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727530A (en) * 1980-07-25 1982-02-13 Kansai Electric Power Co High voltage cutout fuse
JPS60162357U (en) * 1984-04-05 1985-10-28 大阪ヒユ−ズ株式会社 High voltage cut-out fuse
JPS61190652U (en) * 1985-05-20 1986-11-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020061334A (en) * 2018-10-12 2020-04-16 エナジーサポート株式会社 Fuse for high pressure cutter
JP7034882B2 (en) 2018-10-12 2022-03-14 エナジーサポート株式会社 Fuse for high voltage blower

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