JP2573762Y2 - Current limiting resistance wire - Google Patents
Current limiting resistance wireInfo
- Publication number
- JP2573762Y2 JP2573762Y2 JP1991000284U JP28491U JP2573762Y2 JP 2573762 Y2 JP2573762 Y2 JP 2573762Y2 JP 1991000284 U JP1991000284 U JP 1991000284U JP 28491 U JP28491 U JP 28491U JP 2573762 Y2 JP2573762 Y2 JP 2573762Y2
- Authority
- JP
- Japan
- Prior art keywords
- glass fiber
- fiber coating
- coating layer
- current
- resistance wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Insulated Conductors (AREA)
- Details Of Resistors (AREA)
- Breakers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、限流抵抗線に関し、特
に限流特性を有する導体の直外周にガラス繊維被覆層を
有する限流抵抗線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current limiting resistance wire, and more particularly, to a current limiting resistance wire having a glass fiber coating layer on the outer periphery of a conductor having current limiting characteristics.
【０００２】[0002]
【従来の技術】一般に、電源と負荷との間に接続され、
内部に回路電流を遮断する遮断器を備えた電気装置コン
トロールセンタに使用される限流抵抗線は、短絡時等の
大電流によって発熱しジュール熱によって大電流を有効
に限流する機能を有している。従来、このような限流抵
抗線としては、限流特性を有する導体上にアスベスト繊
維の編組による断熱層を設け、その上に耐熱性に優れた
ポリテトラフルオロエチレンやシリコーンゴムの絶縁層
を設けた構成の電線が使用されている。2. Description of the Related Art Generally, a power supply is connected between a power supply and a load,
The current limiting resistance wire used for the electrical equipment control center equipped with a circuit breaker that interrupts the circuit current has the function of generating heat by a large current such as a short circuit and effectively limiting the large current by Joule heat. ing. Conventionally, as such a current-limiting resistance wire, an insulating layer of asbestos fiber braid is provided on a conductor having current-limiting characteristics, and an insulating layer of polytetrafluoroethylene or silicone rubber having excellent heat resistance is provided thereon. Wires with different configurations are used.
【０００３】[0003]
【考案が解決しようとする課題】しかしながら、このよ
うな従来の限流抵抗線おいては、人体に有害なアスベス
ト繊維が使用されているため作業環境が汚染されるとい
う難点があり、またこのアスベスト繊維が有害な特定化
学物質に認定され使用が制限されているため、かかる構
成の限流抵抗線の製造が困難な状況になっている。一
方、アスベスト繊維に代わる耐熱特性の良好な材料とし
ては、一般ガラス繊維やソーダガラス繊維が知られてい
るが、これらのガラス繊維は、その耐熱温度が６００℃
〜２００℃程度であるため、これらのガラス繊維を限流
特性を有する導体直上に被覆した場合においては、使用
時における導体の温度が短時間で８００°〜９００℃に
も達するため、一般ガラス繊維やソーダガラス繊維によ
る被覆では、耐熱特性が悪く品質が低下するという難点
があった。また耐熱温度が１０００℃程度の繊維として
は石英ガラス繊維が知られているが、かかる石英ガラス
繊維は高価であり、断熱層として限流特性を有する導体
直上に厚く被覆すると電線全体の製造コストが高くなる
という難点があった。そこで本考案は、人体に有害なア
スベスト繊維を用いずに、しかも耐熱特性が良好であ
り、かつその製造コストも低減しうる限流抵抗線を提供
することを目的とする。However, such a conventional current-limiting resistance line has a drawback that the working environment is polluted because asbestos fibers harmful to the human body are used. Since the fiber is recognized as a harmful specific chemical substance and its use is restricted, it is difficult to manufacture a current-limiting resistance wire having such a configuration. On the other hand, as a material having good heat resistance in place of asbestos fiber, general glass fiber and soda glass fiber are known, and these glass fibers have a heat resistance temperature of 600 ° C.
When these glass fibers are coated directly on a conductor having current-limiting characteristics, the temperature of the conductor during use reaches 800 ° C. to 900 ° C. in a short time because the temperature is about 200 ° C. to 200 ° C. In addition, the coating with soda glass fiber has a disadvantage that the heat resistance is poor and the quality is reduced. Quartz glass fiber is known as a fiber having a heat-resistant temperature of about 1000 ° C. However, such quartz glass fiber is expensive, and if it is thickly coated just above a conductor having a current-limiting characteristic as a heat insulating layer, the manufacturing cost of the entire electric wire is reduced. There was a drawback that it became expensive. Therefore, an object of the present invention is to provide a current-limiting resistance wire which does not use asbestos fibers which are harmful to the human body, has good heat resistance, and can reduce the manufacturing cost.
【０００４】[0004]
【課題を解決するための手段】本考案の限流抵抗線は、
限流特性を有する導体の直外周に石英ガラス繊維からな
る第一次ガラス繊維被覆層が設けられ、この第一次ガラ
ス繊維被覆層の外周に、第一次ガラス繊維被覆層よりも
厚肉の一般ガラス繊維からなる第二次ガラス繊維被覆層
及びシリコ−ンゴムの絶縁層が順次設けられていること
を特徴とする。The current-limiting resistance of the present invention is as follows.
A primary glass fiber coating layer made of quartz glass fiber is provided on the outer periphery of a conductor having current-limiting characteristics, and the outer periphery of the primary glass fiber coating layer has a thickness greater than that of the primary glass fiber coating layer. A secondary glass fiber coating layer made of general glass fiber and an insulating layer made of silicone rubber are sequentially provided.
【０００５】[0005]
【作用】本考案の限流抵抗線においては、耐熱温度の高
い第一次ガラス繊維被覆層を薄く形成することによって
第二次ガラス繊維被覆層の保護が図られ、また耐熱温度
が低くかつ製造コストの安価な第二次ガラス繊維被覆層
を厚く形成することによって第二次ガラス繊維被覆層の
熱抵抗の増大が図られ、ひいては第一次及び第二次ガラ
ス繊維被覆層から成る断熱層の外表面の温度の低減が図
られる。According to the current limiting resistance wire of the present invention, the secondary glass fiber coating layer is protected by forming the primary glass fiber coating layer having a high heat-resistant temperature to be thin, and the heat-resistant temperature is low and the manufacturing is performed. By forming the low-cost secondary glass fiber coating layer thicker, the thermal resistance of the secondary glass fiber coating layer is increased, and as a result, the heat insulation layer composed of the primary and secondary glass fiber coating layers is increased. The temperature of the outer surface is reduced.
【０００６】[0006]
【実施例】以下、本考案の一実施例を図１を参照して説
明する。図１において、符号１は、鉄、コバルト合金等
から成る限流素線をより合わせて成る限流特性を有する
導体を示しており、この導体１は、短絡時等の温度上昇
によりその抵抗値を増大させて大電流を制限する機能を
有している。この限流特性を有する導体１の直外周に
は、耐熱温度の高い第一次ガラス繊維被覆層としてその
耐熱温度が８００℃〜１０００℃程度の石英ガラスによ
る編組２が設けられている。なお、石英ガラスによる編
組２の厚さは１５０μｍ程度とされ、この程度の厚さ
は、例えば８５０番手の石英ガラス繊維の一重編組によ
って十分確保される。第一次ガラス繊維被覆層の上に
は、第二次ガラス繊維被覆層として、その耐熱温度が４
００℃〜６００℃程度の一般ガラスによる編組３が設け
られている。一般ガラスによる編組３の厚さは７００μ
ｍ程度とされ、この程度の厚さは、例えば３９０番手の
一般ガラス繊維の二重編組によって十分確保される。第
二次ガラス繊維被覆層の上には、絶縁層として、シリコ
ーンゴムの押出被覆層４が１．０ｍｍ〜１．５ｍｍ程度
の厚さを有して設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a conductor having current-limiting characteristics formed by twisting current-limiting strands made of iron, a cobalt alloy, or the like. And a function to limit a large current. A braid 2 made of quartz glass having a heat-resistant temperature of about 800 ° C. to 1000 ° C. is provided as a primary glass fiber coating layer having a high heat-resistant temperature on the outer circumference of the conductor 1 having the current-limiting characteristics. The thickness of the braid 2 made of quartz glass is about 150 μm, and this thickness is sufficiently ensured by, for example, a single braid of 850th quartz glass fiber. On the first glass fiber coating layer, as a second glass fiber coating layer, the heat resistance temperature is 4
A braid 3 made of general glass at about 00 ° C. to 600 ° C. is provided. The thickness of the braid 3 made of general glass is 700μ
m, and this thickness is sufficiently ensured by, for example, a double braid of 390th ordinary glass fiber. On the secondary glass fiber coating layer, an extruded coating layer 4 of silicone rubber is provided as an insulating layer with a thickness of about 1.0 mm to 1.5 mm.
【０００７】かかる構成の限流抵抗線においては、短絡
時等における限流特性を有する導体１の温度が８００℃
〜９００℃程度に達しても、耐熱温度の低い第二次ガラ
ス繊維被覆層が耐熱温度の高い第一次ガラス繊維被覆層
によって保護され、また製造コストの低い第二次ガラス
繊維被覆層を厚く形成することによって、第一次及び第
二次ガラス繊維被覆層から成る断熱層の外表面の温度を
大幅に低減することができる。一方、限流特性を有する
導体１の直外周に設けられる第一次ガラス繊維被覆層の
厚さは薄く形成しても第二次ガラス繊維被覆層を十分保
護しうるので、ガラス繊維被覆層全体としてはその製造
コストがさほど高くならず、電線全体としても割安な限
流抵抗線を提供することができる。なお、上記実施例の
限流抵抗線においては、第二次ガラス繊維被覆層とし
て、一般ガラス繊維による編組を用いているが、本考案
はこれに限定されず例えばソーダガラス繊維による編組
でもよい。またシリコーンゴムによる押出絶縁層４に代
えて、ポリテトラフルオロエチレンエチレン等の耐熱特
性の良好な絶縁材料による絶縁層を押出被覆してもよ
い。[0007] In the current limiting resistance wire having such a configuration, the temperature of the conductor 1 having current limiting characteristics at the time of short circuit or the like is 800 ° C.
Even when the temperature reaches about 900 ° C., the second glass fiber coating layer having a low heat-resistant temperature is protected by the first glass fiber coating layer having a high heat-resistant temperature, and the second glass fiber coating layer having a low manufacturing cost is thickened. By forming, the temperature of the outer surface of the heat insulating layer composed of the primary and secondary glass fiber coating layers can be significantly reduced. On the other hand, even if the thickness of the primary glass fiber coating layer provided on the outer periphery of the conductor 1 having the current limiting characteristic can be made small, the secondary glass fiber coating layer can be sufficiently protected, so that the entire glass fiber coating layer As a result, it is possible to provide a current-limiting resistance wire whose manufacturing cost is not so high and the whole electric wire is inexpensive. In the current limiting resistance wire of the above embodiment, a braid made of general glass fiber is used as the secondary glass fiber coating layer, but the present invention is not limited to this, and a braid made of soda glass fiber may be used. Instead of the extruded insulating layer 4 made of silicone rubber, an insulating layer made of an insulating material having good heat resistance such as polytetrafluoroethylene ethylene may be extruded.
【０００８】[0008]
【考案の効果】本考案の限流抵抗線においては、耐熱温
度の低い第二次ガラス繊維被覆層が耐熱温度の高い第一
次ガラス繊維被覆層によって保護され、また断熱層の外
表面の温度が厚く形成した第二次ガラス繊維被覆層の熱
抵抗の増大によって大幅に低減される。また導体の直外
周に設けられる第一次ガラス繊維被覆層の厚さを薄く形
成しても、第二次ガラス繊維被覆層を十分保護できるの
で、断熱層全体としてはその製造コストがさほど高くな
らず、比較的割安な限流抵抗線を提供することができ
る。In the current-limiting resistance wire of the present invention, the secondary glass fiber coating layer having a low heat-resistant temperature is protected by the primary glass fiber coating layer having a high heat-resistant temperature, and the temperature of the outer surface of the heat insulating layer is reduced. Is greatly reduced by an increase in the thermal resistance of the secondary glass fiber coating layer formed thick. Also, even if the thickness of the primary glass fiber coating layer provided on the outer periphery of the conductor is formed to be thin, the secondary glass fiber coating layer can be sufficiently protected, so that the manufacturing cost of the heat insulating layer as a whole is very high. And a relatively inexpensive current limiting resistance wire can be provided.
【図１】 本考案の限流抵抗線の一実施例を示す横断面
図。FIG. 1 is a cross-sectional view showing an embodiment of a current limiting resistance wire of the present invention.
１…限流特性を有する導体 ２…石英ガラスによる編組 ３…一般ガラスによる編組 ４…押出絶縁層 DESCRIPTION OF SYMBOLS 1 ... Conductor which has a current-limiting characteristic 2 ... Braid with quartz glass 3 ... Braid with general glass 4 ... Extruded insulating layer
Claims (1)
ス繊維からなる第一次ガラス繊維被覆層が設けられ、こ
の第一次ガラス繊維被覆層の外周に第一次ガラス繊維被
覆層よりも厚肉の一般ガラス繊維からなる第二次ガラス
繊維被覆層及びシリコ−ンゴムの絶縁層が順次設けられ
ていることを特徴とする限流抵抗線。1. A quartz glass directly around a conductor having current-limiting characteristics.
First glass fiber coating layer made of cellulose fiber is provided, the secondary glass fiber coating layer made of ordinary glass fibers thicker than primary glass fiber coating on the outer periphery of the primary glass fiber coating And a silicon rubber insulating layer are sequentially provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991000284U JP2573762Y2 (en) | 1991-01-09 | 1991-01-09 | Current limiting resistance wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991000284U JP2573762Y2 (en) | 1991-01-09 | 1991-01-09 | Current limiting resistance wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0525701U JPH0525701U (en) | 1993-04-02 |
| JP2573762Y2 true JP2573762Y2 (en) | 1998-06-04 |
Family
ID=11469611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991000284U Expired - Lifetime JP2573762Y2 (en) | 1991-01-09 | 1991-01-09 | Current limiting resistance wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2573762Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176912U (en) * | 1986-04-30 | 1987-11-10 |
-
1991
- 1991-01-09 JP JP1991000284U patent/JP2573762Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0525701U (en) | 1993-04-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |