Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1995-05-26
1996-04-02
DeBoer, Todd
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361129, 361134, H02H 904
Patent
active
055046452
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND INFORMATION
The invention present concerns an arrangement with several surge arresters, arranged next to one another with parallel axes, which each have an electric arc section arranged outside and parallel to the longitudinal axis of the arrester housing, a first connecting line to join the respective surge arrester to a common first conductor rail, and a second connecting line; and in which each first connecting line is oriented, beginning from a first end of the respective surge arrester, perpendicular to the latter's axis.
An arrangement of surge arresters of this kind is known, for example, from German Patent No. 22 48 113. In the arresters of the known arrangement, in the event of an overload, an electric arc can occur in the outer region between the connecting lines of the surge arrester. The aforesaid German patent discloses no means which promote the removal of such an electric arc from the arrester housing, or prevent the occurrence of an electric arc between two adjacent surge arresters, although an electric arc specifically at this point can damage several surge arresters.
SUMMARY OF THE INVENTION
It is the object of the invention to configure an arrangement of several surge arresters of the aforesaid type in such a way that, on the one hand, electric arcs do not occur in the region between several arresters, and on the other hand, arcs that do occur are removed as quickly and reliably as possible from the arrester housing.
According to the present invention, the aforementioned object is attained by the fact that the position of the electric arc section at the circumference of the respective surge arrester is defined by at least one exhaust opening which is arranged at the circumference of the surge arrester at a position facing away from the adjacent surge arresters; that a first connecting line extends from the respective surge arrester substantially radially in the direction facing away from the electric arc section; and that the direction of flow of the current in the respective first connecting line on the one hand and in the first conductor rail on the other hand from in each of the surge arresters an angle that is less than 90 degrees.
The individual surge arresters have exhaust openings that, in the event of an overload, allow hot insulating gas to flow from the interior of the arrester housing along its outer wall. In the event of an overload, an electric arc is to occur preferentially in this region. According to the present invention, the arrangement is such that no electric arc sections are provided in the region between adjacent surge arresters, since an electric arc between two arresters would place a heavy thermal load on both of them. For example, if the surge arresters are arranged vertically in a row next to one another, the electric arc sections can in each case be arranged on one long side of the row at each surge arrester.
Because the connecting line is arranged perpendicular to the longitudinal axis of the respective surge arrester, and thus also perpendicular to the electric arc section, the magnetic field generated by a current flowing through the first connecting line is oriented in such a way that it exerts upon the electric arc a force which moves it. Since, according to the invention, the first connecting line extends, for each of the surge arresters, radially in the direction facing away from the electric arc section, the result is a magnetic field, generated by a current in the first connecting line, which pushes the electric arc away from the housing of the respective arrester. Because an angle of less than 90 degrees is formed between the direction of flow of the current in the respective first connecting line and the direction of flow of the current in the first conductor rail, the current within the first conductor rail also makes a contribution to the creation of a magnetic field that pushes the electric arc away from the arrester housing.
If the first conductor rail were arranged perpendicular to the respective first connecting line, the curren
REFERENCES:
patent: 4989115 (1991-01-01), Bourdagen et al.
Hinrichsen Volker
Kuhne Wolfgang
DeBoer Todd
Siemens Aktiengesellschaft
LandOfFree
Arrangement with several surge arresters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement with several surge arresters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement with several surge arresters will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2020926