DE7509085U - Electric switchgear cubicle - Google Patents

Description

FRITZ DRIESCHER, SPECIAL FACTORY FOR ELECTRICITY REQUIREMENTS, Q ~ 5144 WEGBERG, INDUSTRIESTRASSE

Wegberg, April 22nd, 1975

Electric holding cell

The innovation concerns an electrical power cell with cell dividing walls and pressure-resilient rear wall *

From the DT-AS 1o 59o 79 a switching zone ". Ie has already become known, the rear wall of which is arranged to be pressure-resilient, which is in the
In the event of an arcing fault caused by a short circuit, it pops up and exposes an upwardly directed relief opening.

* gives. Wall panels provided on the flap should have an over-

._—- Prevent the burning of the arc gases from reaching the switchgear cells. However, this arrangement has the disadvantage that it only releases a relatively small relief opening,
which cannot ensure a sufficiently rapid pressure relief with the network short-circuit power, which has risen sharply in comparison to the past.

In contrast, the innovation in a switching cell of the type mentioned provides that the rear wall of each switching cell
vertically divided into two parts of approximately the same width, which are attached to the cell frame parallel to the plane of division and
In the event of an arcing fault occurring inside the switching cell, they bend up in such a way that they continuously form extensions of the cell partition walls of equal width.

The advantage that can be achieved with the innovation is that a relief opening is available, which is completely
The curved back wall parts approximately corresponds to the area of the cell width χ cell height.

7509085 08/07/75

The provision of a consistently large relief opening that extends over the entire structural height of the switchgear cubicle has the effect of that the pressure wave only has to cover a short distance to the relief opening, regardless of its starting point, whereby a rapid pressure reduction can take place. At the same time, the spread of burning gases to neighboring cells is prevented, in that the bent back wall parts protrude into the free space behind the switchgear and there is an extension effect of the cell partitions. The small swivel radius of the is also beneficial for quick relief Rear panel parts. Of course, an additional relief flap can be used to increase the relief effect Way to be provided in the top cell cover.

An embodiment of the innovation is shown in a drawing. Show it

Fig. 1 is a rear view of a three-cell

Switchgear

and
Fig. 2 is a plan view of the switchgear according to a

Arc fault in the middle switchgear cell.

According to FIGS. 1 and 2, the switchgear installed in front of a wall 1 consists of three switch cells 2 of the same structure, 3, 4. Each switch cell 2, 3, 4 is with its own, according to the innovation vertically in two approximately equal width parts 5, 6 provided divided rear wall, which is preferably made of folded sheet metal. The parts 5, 6 are parallel to the parting plane 8 fastened by fasteners 7 to the switchgear cell frame.

^{In FIG. 2, the parts 5 1} , 6 ^{1 of} the switching cell 3 opened by the pressure wave of an arc fault act as an extension of the cell partition walls 9, 1o.

In this exemplary embodiment, the parts S ¹ , 6 ¹ prevent the burning accidental arc gases escaping in the direction of the arrow from reaching over to the neighboring cells 2, 4.

7509085 O7.08.75

Claims (1)

Protection claim 1. Electrical switchgear cell with cell partition walls and pressure-resilient rear wall, characterized in that the rear wall (2, 3, 4) is divided vertically into two approximately equal-width parts (5, 5 ¹ , 6, 6 ¹ ) which are parallel to the dividing plane (8 ) are attached to the cell frame and, in the event of an arcing fault occurring inside the switching cells (2, 3, 4), bend up in such a way that they continuously form extensions of the cell partition walls (9, 1ο) of equal width. 7509085 08/07/75