High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Vacuum
Patent
1996-11-26
1999-01-26
Scott, J. R.
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Vacuum
218139, H01H 3366
Patent
active
058641084
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a power switch module designed to be mounted in gas-filled containers of gas-insulated switchgear, wherein each vacuum switch tube has a corresponding rectilinearly movable actuating rod leading into the gas-filled container through a bellows-type seal.
BACKGROUND OF THE INVENTION
A gas-insulated switchgear of the type mentioned above is known from German Patent No. 4,211,154 A1. According to this reference, the power switches designed as vacuum switch tubes are fastened to an insulating plate using two supports, with the insulating plate being in turn connected to the front and rear walls of the container through angle brackets. Furthermore, an additional insulating plate arranged under the vacuum switch tubes, similarly fastened to the inner walls of the container, serves for additional fastening of the vacuum switch tubes within the container. The insulating plates are dimensioned so that the vacuum switch tubes are accessible during assembly at the points required therefor and the insulating gas can circulate sufficiently around the vacuum switch tubes during operation.
German Patent No. 3,436,173 A1 discloses a power switch mounted on the inside of the front wall of a metal capsule filled with insulating gas, in a housing made of insulating material. No sealed bellows are, however, provided here for feed-through. German Patent No. 4,210,716 A1, on the other hand, discloses a multipole vacuum switch whose poles are surrounded with shell-type insulating pieces. These vacuum switches are not, however, mounted in gas-filled containers.
OBJECTS AND SUMMARY OF THE INVENTION
One object of the present invention is to facilitate the attachment and assembly of vacuum switch tubes inside the container without, however, adversely affecting the technical parameters of the vacuum switch tube insulations in relation to one another and in relation to surrounding components. According to the invention, this is achieved with the following features: the same profile structure to accommodate and shield vacuum switch tubes, of the partition plate forming a part of the gas-filled container and are removably fastened thereto, symmetrically in relation to a longitudinal axis at their free ends for fastening a pole head device radially supporting the vacuum switch tubes in the outer end area, and the inner area opposite one another in relation to a longitudinal axis for fastening a pole support device which supports the vacuum switch tubes in the inner end area.
With such a design of the insulating support devices, the vacuum switch tubes are largely independent of the geometrical shape of the container in which they are located. Only the partition plate representing a part of the gas-filled container serves as a mounting base for the insulating support devices. The modular design of the power switches considerably facilitates pre-assembly, which can thus performed in substantially smaller volume units, which makes the final assembly, carried out at different times and/or in different places, more cost-effective.
With the pole support device and pole head device arranged between the two insulating support devices, the vacuum switch tubes are securely fastened in the container with almost identical fastening elements. The screw beds create a more flexible assembly of the vacuum switch tubes within the container, which can be disassembled at any time.
An advantageous embodiment of the invention provides the following features: area facing the partition plate, and provided with stops each semi-enclosing a bolt barrel.
The trapezoidal profile on both sides of the insulating support devices provides the supports with considerable stability and provides the vacuum tubes with exact positioning with the actuator rods movable in the bellows; the stops semi-enclosing the bolt barrels allow dimensional tolerance adjustments to be made through appropriate position corrections of the vacuum switch tubes.
Another advantageous embodiment of the invention provides the following f
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Rohling Christoph
Sigusch Claudia
Steinemer Norbert
Scott J. R.
Siemens Aktiengesellschaft
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