Title:
LIGHTENING ARRESTER
Document Type and Number:
Japanese Patent JPH01176687
Kind Code:
A
Abstract:
PURPOSE:To obtain safer voltage releasing function without oversizing the whole lightening arrester by arranging an arc guide to shift a flash communication path inside an insulation cylinder to the outside of the insulation cylinder. CONSTITUTION:When an arc accident occurs, by the shift of gas round a non- linear element, whose pressure rised by being heated by arc heat, toward through holes 23c and 33c, the temperature of metal round a voltage release hole rises and an organic elastic insulating material covering the through hole softens or dissolves and pressure gas erupts from the through hole and is blown to the inside peripheries of arc guides 26 and 27. Since these arc guides are formed in cup-shape, the direction of erupted gas is changed to the longitudinal direction of an insulation cylinder 22, and since this erupted gas is already ionized by the arc heat, a flash communication path whose voltage resistance is extremely small is formed outside the insulation cylinder. For this reason, the flash communication path is easily broken for insulation and the arc immediately shifts to this flash communication path.
Inventors:
SHIGA SATORU
KOIKE HIROTSUGU
KOIKE HIROTSUGU
Application Number:
JP33538287A
Publication Date:
July 13, 1989
Filing Date:
December 29, 1987
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H01B17/46; H01C7/12; H01T1/15; (IPC1-7): H01B17/46; H01C7/12; H01T1/15
Domestic Patent References:
| JPS61200620A | 1986-09-05 |
Attorney, Agent or Firm:
Iwao Yamaguchi