JPH0312005Y2 - - Google Patents
Info
- Publication number
- JPH0312005Y2 JPH0312005Y2 JP1984031026U JP3102684U JPH0312005Y2 JP H0312005 Y2 JPH0312005 Y2 JP H0312005Y2 JP 1984031026 U JP1984031026 U JP 1984031026U JP 3102684 U JP3102684 U JP 3102684U JP H0312005 Y2 JPH0312005 Y2 JP H0312005Y2
- Authority
- JP
- Japan
- Prior art keywords
- bus duct
- temperature
- insulated
- wire
- wires
- 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
Links
Landscapes
- Installation Of Bus-Bars (AREA)
Description
【考案の詳細な説明】
（技術分野）
本考案は、裸導体バスダクト内の結露を防止す
るバスダクトの構造に関するものである。[Detailed Description of the Invention] (Technical Field) The present invention relates to a bus duct structure that prevents dew condensation within a bare conductor bus duct.
（背景技術）
従来より、ハウジング内に絶縁支持物（スペー
サ）により複数本（例、２相、３相等）の裸導体
を支持したバスダクトが屋内配電用として使用さ
れている。この裸導体バスダクトは、施工場所の
温度が高く、無負荷状態が続くと、バスダクトの
絶縁支持物の表面に結露が発生し、絶縁抵抗不良
となり、送電に支障を来たし、相間、対地短絡事
故の要因となる。(Background Art) Conventionally, bus ducts in which a plurality of bare conductors (eg, two-phase, three-phase, etc.) are supported within a housing by insulating supports (spacers) have been used for indoor power distribution. If the bare conductor bus duct is installed at a high temperature and remains unloaded for a long time, condensation will form on the surface of the insulating support of the bus duct, resulting in poor insulation resistance, interfering with power transmission, and causing short circuits between phases and ground. It becomes a factor.
このため、従来、結露防止のためバスダクト内
に温風を送りこんだり、絶縁抵抗の悪いものを強
制的に低電圧で送電し、導体過熱を行ない、バス
ダクトの内部乾燥を行なつた後、再度絶縁抵抗を
測定した後、送電を行なう面倒な操作を行なう必
要があつた。 Conventionally, to prevent condensation, warm air was sent into the bus duct, or conductors with poor insulation resistance were forced to transmit electricity at a low voltage to overheat the conductor. After drying the inside of the bus duct, the insulation was re-insulated. After measuring the resistance, it was necessary to carry out the troublesome operation of transmitting power.
（考案の開示）
本考案は、上述の問題点を解決するため成され
たもので、バスダクト内部を適当に加熱すること
により、上述の結露を防ぎ、短絡事故を防止し得
るバスダクトの構造を堤供することが目的であ
る。(Disclosure of the invention) The present invention has been made to solve the above-mentioned problems, and by appropriately heating the inside of the bus duct, the structure of the bus duct can be improved to prevent the above-mentioned dew condensation and prevent short circuit accidents. The purpose is to provide
本考案は、バスダクト内部に長さ方向に１条又
は複数条の絶縁定温ヒーター電線を設置したこと
を特徴とするバスダクトである。 The present invention is a bus duct characterized by having one or more insulated constant temperature heater electric wires installed in the length direction inside the bus duct.
本考案の対象となるバスダクトは、ハウジング
内にスペーサにより複数本（例、２相、３相等）
の裸導体（ブスバー）を支持した裸導体バスダク
トである。 The bus duct that is the subject of this invention has multiple bus ducts (e.g. 2-phase, 3-phase, etc.) with spacers inside the housing.
This is a bare conductor bus duct that supports bare conductors (bus bars).
第１図は本考案の実施例を示す横断面図であ
る。図において、３本の裸導体１は長方形のハウ
ジング２内で所定間隔毎（例、約30cmピツチ）に
スペーサ（絶縁支持物）３により支持されてい
る。ハウジング２内の一隅には絶縁定温ヒーター
電線４が取付具５により（例、約１ｍピツチ）取
付けられている。 FIG. 1 is a cross-sectional view showing an embodiment of the present invention. In the figure, three bare conductors 1 are supported within a rectangular housing 2 by spacers (insulating supports) 3 at predetermined intervals (for example, about 30 cm pitch). An insulated constant temperature heater electric wire 4 is attached to one corner of the housing 2 using fittings 5 (for example, at a pitch of about 1 m).
この絶縁定温ヒーター電線４は加熱温度が所定
の温度（例、約100℃）になると、温度上昇が飽
和し、その温度以上に温度が上らないようにした
電気絶縁を施したヒーター線で、例えば第２図に
示すような構造のものである。図において、両側
に抵抗線（単線又は撚線）６，６′が配置され、
それらの周りを被覆すると共に、それらの線間を
連結するような帯状の導電性特殊絶縁層（温度に
よつて体積固有抵抗が変わる物質層）７が設けら
れ、さらに層７の周りには架橋ポリエチレン
（PE）絶縁層８が被覆されている。これらの導電
性又は絶縁性の物質は、電子照射又は架橋剤によ
り架橋されたものである。 This insulated constant temperature heater wire 4 is an electrically insulated heater wire that saturates the temperature rise when the heating temperature reaches a predetermined temperature (for example, about 100 degrees Celsius), and prevents the temperature from rising above that temperature. For example, it has a structure as shown in FIG. In the figure, resistance wires (single wire or twisted wire) 6, 6' are arranged on both sides,
A band-shaped conductive special insulating layer (a material layer whose volume resistivity changes depending on the temperature) 7 is provided to cover the surroundings and connect the wires, and further around the layer 7 is a cross-linked conductive insulating layer 7. A polyethylene (PE) insulating layer 8 is coated. These conductive or insulating substances are crosslinked by electron irradiation or by a crosslinking agent.
抵抗線６，６′としては、例えば加熱温度が100
℃程度になると、第３図に示すように特殊絶縁層
７の体積固有抵抗が常温の102〜104Ω−cmから
100℃で105〜107Ω−cmに上昇し、抵抗線６と
６′が絶縁され、通電が停止する。第２図に示す
ような平型状のヒーター電線の寸法は、例えば厚
さ５mm、幅15mm程度である。 For example, the heating temperature of the resistance wires 6 and 6' is 100
℃, the volume resistivity of the special insulating layer 7 decreases from 10 2 to 10 4 Ω-cm at room temperature, as shown in Figure 3.
At 100°C, the resistance increases to 10 5 to 10 7 Ω-cm, and the resistance wires 6 and 6' are insulated and the current flow is stopped. The dimensions of the flat heater wire as shown in FIG. 2 are, for example, about 5 mm in thickness and 15 mm in width.
このような絶縁定温ヒーター電線４の抵抗線
６，６′の端末部を電源に接続し、それらの他端
は相互に絶縁して電流を流すと、電流は抵抗線
６，６′間の導電性特殊絶縁層７を介して流れ、
平型状のヒーター電線４全体が一様に加熱され、
例えば温度が100℃程度になると導電性特殊絶縁
層７が絶縁物と化し、通電が停止され、約100℃
の温度を維持するので、別個に温度調節装置を設
置する必要がない。 When the ends of the resistance wires 6, 6' of such an insulated constant temperature heater electric wire 4 are connected to a power source, and the other ends are insulated from each other and a current is passed, the current flows between the resistance wires 6, 6'. flows through the special insulating layer 7,
The entire flat heater wire 4 is heated uniformly,
For example, when the temperature reaches about 100℃, the conductive special insulating layer 7 turns into an insulator, and the current supply is stopped.
temperature is maintained, so there is no need to install a separate temperature control device.
なお、絶縁定温ヒーター電線の構造は第２図に
示すものに限定されるものではなく、本考案は同
様の機能を有するものであれば良く、又その断面
形状は、平型状、平角状、梯形状、８の字状、そ
の他の異形のいずれでも良い。 The structure of the insulated constant temperature heater electric wire is not limited to that shown in FIG. 2, and the present invention may be of any structure as long as it has the same function, and its cross-sectional shape may be flat, rectangular, rectangular, etc. It may be a ladder shape, a figure 8 shape, or any other irregular shape.
このような絶縁定温ヒーター線４はバスダクト
のハウジング２内の隙間で、かつ導体の絶縁抵抗
を損なわない個所に取付けられ、通常バスダクト
ユニツト毎にバスダクト本体接続と同時にヒータ
ー電線４も接続する。 Such an insulated constant temperature heater wire 4 is installed in a gap in the housing 2 of the bus duct at a location where the insulation resistance of the conductor is not impaired, and the heater wire 4 is usually connected to each bus duct unit at the same time as the connection to the bus duct body.
なお、図では絶縁定温ヒーター線４は１条とし
たが、本考案は２条以上の複数条でも良い。 In addition, in the figure, the insulated constant temperature heater wire 4 is one wire, but the present invention may use two or more wires.
上述のようなバスダクトに、必要時絶縁定温ヒ
ーター線４に通電すると、所定温度（列、100℃）
で温度が飽和し、その温度に保持され、バスダク
ト内がその温度近くに加熱されるので、バスダク
ト内部が乾燥し、結露が防止される。 When the insulated constant temperature heater wire 4 is energized when necessary in the bus duct as described above, the predetermined temperature (row, 100°C) is reached.
The temperature is saturated and maintained at that temperature, and the inside of the bus duct is heated close to that temperature, so the inside of the bus duct is dried and condensation is prevented.
（考案の効果）
上述のように構成された本考案のバスダクトは
次のような効果がある。(Effects of the invention) The bus duct of the invention configured as described above has the following effects.
(イ) バスダクト内部に長さ方向に１条又は複数条
の絶縁定温ヒーター電線を設置したから、必要
時、例えばビル等の電気室内施工直後や送電停
止後、バスダクト内のヒーター電線に通電する
と、加熱温度が所定温度（例、約100℃）に保
持され、バスダクト内が加熱されて乾燥するの
で、バスダクト内部の結露が防止されて、絶縁
抵抗不良が防止され、短絡事故が防止される。(b) Since one or more insulated constant temperature heater wires are installed inside the bus duct in the length direction, when necessary, for example, immediately after construction in an electrical room of a building or after power transmission is stopped, when the heater wires inside the bus duct are energized, The heating temperature is maintained at a predetermined temperature (e.g., approximately 100°C), and the inside of the bus duct is heated and dried, thereby preventing dew condensation inside the bus duct, preventing poor insulation resistance, and preventing short circuit accidents.
(ロ) 絶縁定温ヒーター電線は加熱温度が所定温度
になると飽和し、その温度を保持するので、操
作が簡単であり、又面倒な温度調節装置を設置
する必要がなく、設備が簡単で、安価である。(b) The insulated constant temperature heater wire saturates when the heating temperature reaches a predetermined temperature and maintains that temperature, so it is easy to operate, there is no need to install a troublesome temperature control device, and the equipment is simple and inexpensive. It is.
第１図は本考案の実施例を示す横断面図であ
る。第２図は第１図に示す絶縁定温ヒーター電線
の例を示す断面図である。第３図は本考案に用い
られる絶縁定温ヒーター電線における抵抗線の温
度と体積固有抵抗の関係を示す図である。
１……裸導体、２……ハウジング、３……スペ
ーサ、４……絶縁定温ヒーター電線、５……取付
具、６，６′……抵抗線、７……導電性特殊絶縁
層、８……架橋PE絶縁層。
FIG. 1 is a cross-sectional view showing an embodiment of the present invention. FIG. 2 is a sectional view showing an example of the insulated constant temperature heater wire shown in FIG. 1. FIG. 3 is a diagram showing the relationship between the temperature and volume resistivity of the resistance wire in the insulated constant temperature heater wire used in the present invention. DESCRIPTION OF SYMBOLS 1... Bare conductor, 2... Housing, 3... Spacer, 4... Insulated constant temperature heater electric wire, 5... Mounting tool, 6, 6'... Resistance wire, 7... Conductive special insulating layer, 8... ...Crosslinked PE insulation layer.
Claims (1)
間に温度によつて体積固有抵抗が変る物質層を
備える絶縁定温ヒーター電線を１条又は複数条
設置したことを特徴とするバスダクト。 (2) 絶縁定温ヒーター電線の上限温度が約100℃
である実用新案登録請求の範囲第１項記載のバ
スダクト。[Scope of Claim for Utility Model Registration] (1) Inside the bus duct, one or more insulated constant-temperature heater wires with a material layer whose volume resistivity changes depending on the temperature are installed between two resistance wires in the length direction. A bus duct that is characterized by: (2) The upper limit temperature of the insulated constant temperature heater wire is approximately 100℃
A bus duct according to claim 1 of the utility model registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3102684U JPS60144717U (en) | 1984-03-02 | 1984-03-02 | bus duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3102684U JPS60144717U (en) | 1984-03-02 | 1984-03-02 | bus duct |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60144717U JPS60144717U (en) | 1985-09-26 |
| JPH0312005Y2 true JPH0312005Y2 (en) | 1991-03-22 |
Family
ID=30531254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3102684U Granted JPS60144717U (en) | 1984-03-02 | 1984-03-02 | bus duct |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60144717U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50106673U (en) * | 1974-01-24 | 1975-09-02 |
-
1984
- 1984-03-02 JP JP3102684U patent/JPS60144717U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60144717U (en) | 1985-09-26 |
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