DE7141970U - Metal-encapsulated medium-voltage switchgear cubicle - Google Patents

Description

Sachsenwerk. Licht- and Kraft- Aktiengesellschaft, Munich

Pt. 518

Sheet metal-encapsulated medium-voltage switchgear .

The innovation concerns a switchgear with a high current carrying capacity Equipped sheet-metal-encapsulated center lepnnnun formwork he, the outside of the vent opening that can be closed by flaps and possibly an opening for the cable duct is tightly closed.

Switching cells that are closed on all sides offer a high level of security towards the staff. Their use is limited, however, because circuit breakers with a high current carrying capacity are used the warning cannot be dissipated to a sufficient extent during continuous operation. In a known switching cell (OS 1 615 899), flaps can be used to remove the warnings. Ventilation openings provided. The ones on the outside of the cells sore attached flaps are designed to be calibrated

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with extreme warming, e.g. R. infolre fire in the control panel, conclude. The pivotable, spring-loaded flaps are each activated by a pivotable lever, the with a * "K« n «t * t-off — F *« ** n i »rter -Sperrlny» sehalten is kept open. If a fire breaks out in the cell, the thread burns through and the locking lever releases the flaps. Serve pivotable Discharge openings are closed by the springs held. The purpose of this device is to supply air in the event of a fire in the Schaltxelle xn prevent. If a pressure wave occurs in the schnitzel as a result of an electric arc, it can “reopen” of the flaps can when the internal pressure acting on the flaps becomes greater than the spring forces acting in the direction of travel.

This Μ »ι» · »! The novelty will thereby be eliminated. that di Flaps mounted pivotably on the inside of the switching membrane and are designed in such a way that they close the ventilation openings tightly in fractions of a second when a pressure wave occurs and keep it locked at least until after the pressure wave has broken down. The cover of the Schaltxelle with a ventilation opening is advantageous which can be closed by two flaps pivotably mounted about a common axis, the ends of which are in the opened Zuet - on one also having an opening frame-shaped partition.

So that no foreign objects can fall into the schnitzel, the The opening in the false ceiling is covered in a roof-like manner by the two flaps in the open state in such a way that the air flow passes through

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Front sides of the flaps over, multiple hinged, get into the open can.

An embodiment of the innovation is shown in the drawing and is described in more detail below.

Bs show

1 shows a side view of a switching cell without a side wall,

2 shows a front view of the switchgear cubicle without a door,

Fig. 3 is a plan view of the holding cell.

In the lead-encapsulated switchgear cubicle 1, a circuit breaker 2 with a high load capacity, the Sanael rails 3 and the cable outlets are installed. The cooling of the switchgear required for continuous operation is provided by air circulation. This is due to the fact that the air conducted to the cable duct 5 or through the ventilation opening 6 provided through the opening 7 in the partition wall 8 and through the opening 9 in the cell ceiling Saaaelschienen cooling air circulation is indicated by arrows 10a, 10b, 10c. If the cable duct supplies enough air for cooling, the ventilation opening 6 on the side can be dispensed with. The ventilation opening 9 is closed with two flaps 12 pivotably mounted on the axis 11. As seen in Fig. 1, ISAt,

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the opened flaps 12 cover the opening 7 in a roof shape, see above that no foreign bodies can fall into the switchgear cubicle. As Schuts The mesh cover is also against the ingress of foreign bodies intended. The flap 14 for the ventilation opening 6 is when they is open., a means of the stop 15 at an acute angle en the Rear wall of the switchgear cell held. The arrangement of the flaps within of the cell and its position when open make it understandable that the pressure wave created by an arc fault slams the flaps in milliseconds and keeps them closed, as long as internal pressure is present. As a further measure to avoid harmful effects from arcing faults, the Flap a beaded edge 16 and the associated ventilation * - »openings corresponding to edging 17. On the ··" ice, palt-free SehälUelleS created v ^ rdea, di? ice hazard? ss perse

nen as good as looking.

Claims (5)

(III * I II * I I -S- protection claims 1. Sheet metal enclosure equipped with switchgear with high stability. te Mittelspanniinps-Scbnltzel Ie, with the exception of by flaps Closable ventilation openings and possibly an opening for a tightly sealed cable duct is characterized by that the flaps (12, 14) are pivotably mounted on the inside of the switching cell (l) and are designed in this way are that they open the ventilation openings when a pressure wave occurs (6, 9) close tightly in a fraction of a millisecond and at least until train) Abban the pressure wave closed haiton. 2. Sheet metal encapsulated Mittelspannnnps switchgear cell according to claim 1, characterized in that the ceiling of the Switching cell (1) eic a ventilation opening (9) is provided which by two flaps pivoted on a common axis (12) can be closed, the ends of which are generally open on a also an opening (7) having, rahnenföraigen false ceiling (R) lie. 3. Sheet metal-enclosed medium-voltage switchgear cell according to claim 2, characterized in that the opening (7) in the false ceiling (B) of the two flaps (12) ia open Condition is covered in a roof shape that the air flow only at Pass the front sides of the flaps, several times to get into the open without being guided can. -6- -6- 4. Metal-encapsulated medium-voltage filter cell each Anepru * 1 to 3 characterized in that the opening song (C) the depth of a grille (13) can be seen. 5. Blecheekepsei te Mi ttelspannun / re switch cell according to spoke 1 to 4 characterized by the fact that below the switchgear, on the rear wall of the cell, another BeIHftungsKffnang (β) is not seen, the flap (14) generally open Zestaad aa eiaea anchiss (5) so »-flies ^ that the % * \\ mmiami and the flap (14) enclose an acute angle. β. Blechfcekapseltc medium voltage switch trowel according to claims 1 to 5, characterized in that the flap « (12, 14) with a beaded edge (16) and the ventilation opening ■ it is provided with corresponding bevels (17).