EP0388133B1 - Isolateur de suspension - Google Patents

Isolateur de suspension Download PDF

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Publication number
EP0388133B1
EP0388133B1 EP19900302638 EP90302638A EP0388133B1 EP 0388133 B1 EP0388133 B1 EP 0388133B1 EP 19900302638 EP19900302638 EP 19900302638 EP 90302638 A EP90302638 A EP 90302638A EP 0388133 B1 EP0388133 B1 EP 0388133B1
Authority
EP
European Patent Office
Prior art keywords
insulator
shed
ribs
suspension insulator
suspension
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
Application number
EP19900302638
Other languages
German (de)
English (en)
Other versions
EP0388133A3 (fr
EP0388133A2 (fr
Inventor
Takashi Imakoma
Seiichi Kondo
Fumio Kasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
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Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Publication of EP0388133A2 publication Critical patent/EP0388133A2/fr
Publication of EP0388133A3 publication Critical patent/EP0388133A3/fr
Application granted granted Critical
Publication of EP0388133B1 publication Critical patent/EP0388133B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/02—Suspension insulators; Strain insulators
    • H01B17/04—Chains; Multiple chains

Definitions

  • This invention relates to a suspension insulator which is used for supporting power cables on the supporting arms of steel towers and the like.
  • a suspension insulator of the type shown in Fig. 3 is conventionally known, in which the insulator body 1 comprises a shed 2 with several ribs 4 formed concentrically and integrally on the lower face and a head 3 integrally formed at the central portion on the upper face of the shed 2, wherein a metal cap 5 is fitted on the head 3 and fixed with a cement 6, and a metal pin 7 is fitted in the cavity of the head 3 and also fixed with a cement 6.
  • a metal cap 5 is fitted on the head 3 and fixed with a cement 6
  • a metal pin 7 is fitted in the cavity of the head 3 and also fixed with a cement 6.
  • connection pitch H is decided in accordance with JIS (Japanese Industrial Standard) corresponding to the power transmission voltage, whereby the creepage distance L is very limited. Accordingly, the conventional suspension insulator failed to have sufficient insulation resistance.
  • JIS Japanese Industrial Standard
  • a fog-type insulator has been proposed, in which the ribs 4 have an increased height h, as shown in Fig. 4 and US 4559414.
  • dirt such as sand easily collects between the high ribs 4, and that it is difficult to remove such dirt, because an inteval between adjacent ribs 4 is smaller than the height of the ribs 4, if such insulators are used in a desert area.
  • an aero-type suspension insulator in which the ribs 4 are omitted as shown in Fig. 5.
  • This type of insulator enjoys an advantage that sand does not collect thereon, but the diameter of the shed 2 must be increased greatly in order to secure a sufficient creepage distance L, resulting in the increase in the size and weight of the insulator body.
  • Preferred suspension insulator are set out in claims 2 to 4.
  • An insulator body 1 comprises a shed 2 with a plurality of ribs 4 formed concentrically and integrally on the lower face and a head 3 integrally formed at the central portion on the upper face of the shed 2, wherein a metal cap 5 is fitted on the head 3 and fixed witha cement 6, and a metal pin 7 is fitted in the cavity of the head 3 and also fixed with a cement 6.
  • a zinc sleeve 8 is disposed to surround the metal pin 7 for preventing electrolytic corrosion of the latter member. Now, sizing of each portion will be described below.
  • the shed 2 of the present suspension insulator has a diameter of D: a rib height of h;an interval between adjacent ribs of l; a creepage distance as measured along the surface of the main body 1 of L (i. e., the distance as measured from the metal cap 5 to the metal pin 7 along the surface of the shed); and a connection pitch of H when connected to form an insulator string as shown in Fig. 2, these dimensions are determined in such a way that they may satisfy the following equations (1) to (3): 0.8 h ⁇ l 2.5 ⁇ L/H ⁇ 4.5 D ⁇ L
  • the creepage distance L is 2.5 to 4.5 times as long as the connection pitch H according to the equation (2). Therefore, the total number of the insulators as the insulator string can be reduced as compared with the case when the conventional aero-type suspension insulators are used. In such case, the creepage distance of the insulator string of the invention is set the same as the conventional one. Accordingly, the design of the steel tower can be scaled down.
  • a larger interval B can be secured between the sheds 2 as compared with the case when the conventional fog-type insulators are used, even if the connection pitch is identical with the conventional one, and thus possible short-circuiting between the sheds can also be prevented.
  • the ratio L/H is over 4.5, it is impossible to produce the insulator itself.
  • the creepage distance L is larger than the diameter of the shed D.
  • the size of the insulator can be smaller than that of the conventional aero-type insulator.
  • Table 1 shows difference in the lengths of insulator strings comprising the respective insulators when the creepage distance L is 4600 mm and the mechanical strength is 120 KN.
  • the insulator of this invention enables use of smaller number of insulator units when the insulator string is formed as compared with the case when any of the conventional insulators are used.
  • Table 1 also shows percentages of the lengths of three types insulator strings as compared with the length of the conventional insulator. The length of the insulator string of this invention can be greatly shortend.
  • Table 2 shows difference in the characteristic values of insulator strings each comprising 10 units.
  • creepage distance can be increased without lowering the lightning impulse flashover voltage and wet flashover voltage.
  • this invention not only can reduce collection of dust on the lower faces of the shed even when used in a desert area and facilitate washing off of such dirt if collected between the ribs, but also allows to secure sufficient creepage insulation distance for the shed without increasing the diameter thereof.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)

Claims (4)

  1. Isolateur de suspension ayant un corps d'isolateur (1) avec une cloche (2), deux organes de connexion (5, 7) respectivement sur les côtés supérieur et inférieur du corps (1) d'isolateur et un certain nombre de nervures (4) formées sur le côté inférieur de la cloche (2), où ledit isolateur a des dimensions telles que les équations [1] et [2] soient satisfaites : 0,8 h < 1
    Figure imgb0011
     2,5 ≦ L/H ≦ 4,5
    Figure imgb0012
     où h est la hauteur des nervures (4) à partir de la face inférieure de la cloche (2); 1 est l'intervalle entre des nervures adjacentes (4); L est la distance de glissement le long de la surface de la cloche (2) à partir d'un organe de connexion (7) à l'autre organe de connexion (5) et H est le pas de connexion de l'isolateur de suspension lorsque l'on forme une série d'isolateurs.
  2. Isolateur de suspension selon la revendication 1 où la distance de glissement L et le diamètre D de la cloche sont tels que la relation D ≦ L soit satisfaite.
  3. Isolateur de suspension selon la revendication 1 ou la revendication 2 où les nervures (4) sont disposées concentriquement autour de l'organe de connexion (7) sur la face inférieure de la cloche (2).
  4. Isolateur de suspension selon l'une quelconque des revendications 1, 2 et 3, où l'organe de connexion (7) sur la face inférieure de la cloche a un manchon en métal pour inhiber la corrosion électrolytique.
EP19900302638 1989-03-17 1990-03-13 Isolateur de suspension Expired - Lifetime EP0388133B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP66864/89 1989-03-17
JP6686489A JPH077612B2 (ja) 1989-03-17 1989-03-17 懸垂碍子

Publications (3)

Publication Number Publication Date
EP0388133A2 EP0388133A2 (fr) 1990-09-19
EP0388133A3 EP0388133A3 (fr) 1991-07-31
EP0388133B1 true EP0388133B1 (fr) 1995-11-15

Family

ID=13328151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900302638 Expired - Lifetime EP0388133B1 (fr) 1989-03-17 1990-03-13 Isolateur de suspension

Country Status (3)

Country Link
EP (1) EP0388133B1 (fr)
JP (1) JPH077612B2 (fr)
EG (1) EG19239A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102208233A (zh) * 2010-11-30 2011-10-05 苏州电瓷厂有限公司 一种直流架空输电线路用悬式瓷绝缘子
CN202871419U (zh) * 2011-03-31 2013-04-10 瑟迪崴(有限公司)玻璃与混合柱型隔离器欧洲公司 用于具有大牵引强度的高压绝缘子的介电元件
CN103456428A (zh) * 2013-01-09 2013-12-18 河北荣森电气有限公司 压接式钟罩形盘形悬式复合绝缘子串元件
JP5999560B2 (ja) * 2013-03-22 2016-09-28 日本碍子株式会社 懸垂がいし
JP6208454B2 (ja) * 2013-04-01 2017-10-04 日本車輌製造株式会社 鉄道車両用集電装置
CN115143890B (zh) * 2022-07-06 2022-12-23 中国电力科学研究院有限公司 一种基于三维扫描的绝缘子结构参数测量系统及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE503900C (de) * 1925-12-25 1930-08-05 Hermsdorf Schomburg Isolatoren Verfahren zur Erhoehung der mechanischen Festigkeit von Isolatoren aus keramischer Masse
JPS6049514A (ja) * 1983-08-26 1985-03-18 日本碍子株式会社 耐電食性碍子
JPS63211525A (ja) * 1987-02-25 1988-09-02 日本碍子株式会社 高電圧用磁器碍子

Also Published As

Publication number Publication date
JPH077612B2 (ja) 1995-01-30
JPH02244514A (ja) 1990-09-28
EP0388133A3 (fr) 1991-07-31
EG19239A (en) 1994-10-30
EP0388133A2 (fr) 1990-09-19

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