Electricity: conductors and insulators – Insulators – With insulator-supporting or attaching means
Patent
1997-02-18
1998-06-16
Kincaid, Kristine L.
Electricity: conductors and insulators
Insulators
With insulator-supporting or attaching means
218134, H01B 1700
Patent
active
057674515
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to insulating supports for vacuum switch tubes with actuator units to be used in switchgears, in particular in gas-filled units.
BACKGROUND OF THE INVENTION
As known from German Patent 4,211,154, vacuum switch tubes were previously arranged between upper and lower insulating plates directly fastened, by means of fasteners, on the front and rear walls of the container located in the switchgear. The design of the insulating supports is thus directly dependent on the geometry of the container. Even small geometric changes result in immediate adaptive changes of the insulating supports and/or their fasteners.
OBJECTS AND SUMMARY OF THE INVENTION
The basic object of the present invention is to design the arrangement of the vacuum switch tubes so that adaptive design changes are avoided whenever possible and, in particular, the assembly and installation of the vacuum switch tubes into the containers is considerably simplified.
According to the invention, this is achieved by an insulating support having the following features: with an approximately perpendicular longitudinal side, be removably connected to the switchgear, an enclosing profile crimped inward in relation to the longitudinal plane and fitting around the periphery of an actuator unit of the vacuum switch tubes, bordered by a first attachment arm that is perpendicular to the longitudinal plane, be removably connected to a radial support of the vacuum switch tubes, a second attachment arm extending in the opposite direction to that of the first attachment arm, which arm borders on the flatbed-type extruded plastic piece in the central longitudinal area of the insulating support, symmetrically in relation to a longitudinal axis, and the second attachment arm has two additional screw beds arranged symmetrically in relation to a longitudinal axis, and arranged next to one another on the longitudinal axis. perpendicularly extending longitudinal side, a gap is formed by two insulating supports mounted symmetrically opposite one another; radial and contact supports can be arranged in said gap for the vacuum switch tubes. Both insulating supports are firmly attached to the container or a part thereof with their first attachment arms over the first screw beds, while the second attachment arm with the additional screw beds serves to accommodate a radial support of the vacuum switch tubes. With this arrangement of the vacuum switch tubes between the insulating supports mounted symmetrically opposite one another, the result is that their arrangement within the container is largely independent of the geometry thereof. The design of the insulating supports can also be used with the most varied container designs without requiring constant adaptations to the container geometry.
According to an advantageous embodiment of the invention, the surrounding piece has a trapezoidal shape. The insulating support is given a high degree of rigidity by the trapezoidal design of the surrounding piece.
Another advantageous embodiment of the invention provides for the implementation of the first and second screw beds of the insulating support with stops each semi-surrounding a bolt barrel so that both the assembly with the container and the installation of the vacuum switch tube supports are facilitated. Manufacturing dimensional tolerances can be compensated for with appropriate position corrections of the vacuum switch tubes using the stops.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top plan view of an insulating support in accordance with the invention.
FIG. 1B is a cross-section view of the insulating support taken along lines D--D of FIG. 1A.
FIG. 1C a front view of the insulating support.
FIG. 2 is a cross-section view of the insulating support taken along lines A--A of FIG. 1A.
FIG. 3 is a cross-section view of the insulating support taken along lines B--B of FIG. 1A.
DETAILED DESCRIPTION
FIGS. 1A-1C show insulating support 1 with its flatbed-type extruded plastic piece 2 (FIG. 2). The flatbed-type extrude
REFERENCES:
patent: 3663906 (1972-05-01), Barkan et al.
patent: 3921109 (1975-11-01), Hodgson
patent: 4247745 (1981-01-01), Wilson
patent: 5528009 (1996-06-01), Marquardt et al.
Rohling Christoph
Sigusch Claudia
Steinemer Norbert
Kincaid Kristine L.
Patel Dhiru R.
Siemens Aktiengesellschaft
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