High-voltage circuit breaker having an interrupter module

Details High-voltage circuit breaker having an interrupter module High-voltage circuit breaker having an interrupter module

1999-11-30

2001-09-18

Scott, J. R. (Department: 2832)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Polyphase

C218S155000, C174S018000, C174S142000

Reexamination Certificate

active

06291786

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a high-voltage power circuit breaker that has an interrupter module arranged in a first part of a grounded enclosure made of a conducting material, at least one bushing made of an insulation material connected to a mounting flange of the enclosure for the passage of electric connecting lines from the interrupter module, and at least one current converter surrounding a connecting lead in a ring shape. The current converter is mounted in the area of at least one first mounting flange of the enclosure.
BACKGROUND INFORMATION
A high voltage circuit breaker is described, for example, in U.S. Pat. No. 5,478,980. In particular, a dead tank switch having three interrupter modules, each arranged in a grounded metal enclosure and their connecting leads each guided to an overhead line connection through a bushing made of insulation material, is described. A pipe connection is provided on the metal part of each enclosure, with a mounting flange that is provided with a bushing on the end of the pipe connection.
A current converter is mounted on each pipe connection and surrounds part of the pipe connection, the mounting flange, and part of the bushing.
SUMMARY OF THE INVENTION
An object of the present invention is to create a high voltage circuit breaker, having a simpler and less expensive design, with the construction of the enclosure in particular being simplified.
This object is achieved according to the present invention by arranging the first mounting flange in the immediate vicinity of the first part of the enclosure, and by having one of the bushings pass through the entire length of the current converter in the axial direction of the connecting lead.
Due to the fact that the mounting flange is arranged in the immediate vicinity of the first part of the enclosure, it is possible for the corresponding pipe connection, which is connected to the first part of the enclosure and has the mounting flange, to be very short. The first part of the enclosure surrounding the interrupter module can thus be cast much more easily, in particular when manufactured as a cast part, and it is also simpler to subsequently machine than a part having a longer pipe connection.
Both the manufacture and the machining of the enclosure parts are therefore less expensive in all stages of value creation. The first parts of the enclosure can be shipped and stored in a space-saving manner.
An advantageous embodiment of the present invention provides for the bushing to have a flat surface, at least in the area where it passes through the current converter, or for it to have a reduced surface at the level of the umbrella.
Such a design of the bushing simplifies assembly while also greatly reducing the cost of the current converter in particular.
Another advantageous embodiment of the present invention provides for mounting the current converter on the mounting flange.
Such a mounting permits preassembly and also considerably reduces the mechanical stress on the bushing.


REFERENCES:
patent: 5466891 (1995-11-01), Freeman et al.
patent: 5478980 (1995-12-01), Freeman et al.
patent: 5569891 (1996-10-01), Freeman et al.
patent: 5600112 (1997-02-01), Opfer

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