High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Magnetic blowout
Patent
1999-09-23
2000-07-11
Scott, J. R.
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Magnetic blowout
200303, 218 31, 218155, 218156, H01H 3302, H01H 902
Patent
active
060876093
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE PRESENT INVENTION
The invention relates to an arcing chamber housing for a circuit breaker having a rotary double-break interrupter. The present invention relates furthermore to housing modules for manufacturing an arcing chamber housing of this kind.
BACKGROUND OF THE INVENTION
Arcing chamber housings which are designed for circuit breakers and are able to be assembled from two separate housing modules for each power supply phase are disclosed, for example in European Patent No. B 1-542 636. These housings can be assembled simply and quickly. In addition, it is merely the relatively small arcing chamber housing that needs to be made of an arc-resistant material. On the other hand, the housing which is placed over the arcing chamber housings that correspond in number to the number of phases, can be made of a less expensive material. The disclosed housing modules are essentially constituted of two saucer-shaped housing parts, symmetrically disposed with respect to the median plane in the longitudinal direction of the arcing chamber housing. To assemble the arcing chamber, initially the contact members, arc splitters, etc. are arranged in one of the two saucer-shaped housing modules, and the second housing module, as the case may be, is then placed upon the first housing module and joined, e.g., riveted thereto. The disadvantage of the known arcing chamber housings is, inter alia, that the extinction chambers of arcing chamber housings of this kind are first formed when the two housing modules are joined. For that reason, it is not possible, as a rule, to perform a complete test for correct functioning of the extinction chambers prior to their assembly. To eliminate sources of error, in particular in the arcing chambers, it is often necessary to disassemble the entire arcing chamber when known arcing chamber housings are used.
SUMMARY OF THE INVENTION
An object of the invention is to indicate an arcing chamber housing which is capable of being assembled from two housing modules and which has the advantages of known housings of this kind, is simple and inexpensive, and in which the extinction chambers, following assembly of the arcing chambers, have reproducible arc-quenching performance characteristics. In addition, the intention is to provide housing modules capable of being used for manufacturing arcing chamber housings of this kind.
The present invention provides an arcing chamber housing in which the arcing chamber housing is to be assembled from two essentially L-shaped housing modules, whose first housing part corresponding to a first limb is designed as an extinction chamber.
It is preferable that the two interconnected housing modules have an identical construction, so that there is no need for them to be manufactured and stockpiled separately.
The present invention also provides a housing module in which a first housing part that constitutes the first limb of the L-shaped housing module is designed as extinction chamber (19). One of the stationary contact members, as well as the arm of the rotatable contact member assigned to the stationary contact member in question are arranged inside the extinction chamber, and the second housing part of the housing module that constitutes the second limb is designed as a bearing block for a shaft that actuates the rotatable contact member.
In this context, the side walls of the second housing part forming the second bearing block are expediently provided with semicircular openings.
A significant advantage of the arcing chamber housings of the present invention is that, in each housing module, prior to assembling the arcing chamber housing, the appropriate arcing chamber can be completely preassembled, together with its arc splitters and, if indicated, tested for its functioning.
The same applies to the two stationary contact members and the rotatable contact member. In this context, depending on the design of the L-shaped housing module and of the contact members, the two stationary contact members can each be permanently preassembled in one
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Erven Wolfgang
Jung Klaus
Thilker Lutz
Kloeckner-Moeller-GmbH
Scott J. R.
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