Title of Invention

"BUSHING-TYPE POST INSULATOR FOR A METAL-CLAD ,AIR-INSULATED,MEDIUM-VOLTAGE SWITCHGEAR ASSEMBLY"

Abstract Bushing-type post insulator for a metalclad, air-insulated, medium-voltage switchgear assembly The invention relates to a metalclad, air-insulated medium-voltage switchgear assembly having a number of bushing-type post insulators (DFS) corresponding to the number of phases, and which bushing-type post insulators (DPS) have busbar connections (SSA) and are detachably connected to a post insulator mounting plate (STB). The bushing-type post insulators (DFS) have cuboid post insulator external contours (SAK) to which cuboid post insulator internal contours (SIK) are adjacent, between which post insulator clamping slots (SKS) having concentric cross-sectional contours are located, the post insulator internal contours (SIK) containing in the contact region to the post insulator mounting plates (STB) post insulator guide contours (SFK) which pass through recesses in the post insulator mounting plates (STB) and whose longitudinal surfaces (LFL) facing away from the post insulator external contours (SAK) are tapered trapezoidally towards the free region. Bushing-type post insulators are used in conjunction, with medium-voltage switchgear assemblies for power supply and distribution purposes.
Full Text -1A-
Description
Bushing-type post insulator for a metal-clad, air-insulated, medium-voltage switchgear assembly.
Metalclad, air-insulated Medium-voltage switchgear assembly having a number of bushing-type post insulators corresponding to the number of phases, and which bushing—type post insulators have busbar connections and are detachably connected to a post
insulator mounting plate.
In the metalclad, air—insulated, medium—voltage switchgear assemby de-fined initially, the bushing—type post insulators are used to produce the electrical connection between the busbars and the switching devices inside the medium-voltage switchgear assembly. At the sametime, the bushing—type post insulators are used for supporting the busbar connections which, owing to the structural design and their current load during operation, are correspondingly subjected to mechanical loads.
The object on which the invention is based is to define a bushing-type post insulator which matches the mechanical loads of the busbar in all operating states and, in addition, considerably to simplify the design of these bushing-type post insulators without, however, having to constrict the safety requirements which are normal in this field.

According to the invention, this is achieved by the following features illustrated in the accompanying drawing.
1.1 the bushing—type post insulator DPS has a cuboid poet insulator external contour SAK to which a likewise cuboid post insulator internal contour SIK is adjacent,
1:2 a post insulator clamping slot SKS having a concentric cross—sectional contour is provided between the post insulator external contour SAK and the post insulator internal contour SIK
1.3 the post insulator internal contour SIK has, in the
contact region with the post insulator mounting plate
STB, a post insulator guide contour SFK which passes
through a recess in the post insulator mounting plate
STB and whose longitudinal surface LFL facing away from
the post insulator external contour SAK tapers
trapezoidally towards the free region,
1.4 the post insulator internal contour SIK is adjacent to a
cuboid hollow body QHK which is connected in the region of
the busbar connection SSA to a T-shaped connecting hallow
body AHK which is arranged at right angles to the
longitudinal direction of said hollow body,

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campact installation of the bushing—type post insulator DFS inside the medium—voltage switchqear assembly. This purpose is furthermore also served by the post insulator guide contour SFR, whose longitudinal surface LFL which tapers outwards, engages in the post insulator mounting plate STB to fix the position of the bushing-type post insulator DFS virtually in a self-centring manner. The post insulator guide contour SFK is also used, for example, to carry cables out from the low-voltage area and for capactitive indication of any currents which exist in the medium— voltage switchgear assembly. The bushing-type post insulator is adequately secured in position on the post insulator DFS mounting plate STB by means of its attachment plate BPL, even with respect to any transverse forces that occur, with the separation resulting from the combination of the cuboid hollow body QHK with the T-shaped connecting hollow body AKH.
The current-dependent two-or three-point attachment of the busbar on the busbar connection likewise results in optimization of the busbar connection with respect to any transverse forces that
occur.
According to an advantageous refinement of the invention, the following features are provided 8

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1.5 the T—shaped connecting hollow body AHK is equipped in the
apposite region of the busbar connection SSA Mith an
attachment plate BPL which overhangs the contour of said
hollow body QHK,
1.6 the busbar connection SSA has a straight—line external
contour DAK which is arranged at right angles to the
longitudinal direction of the cuboid hollow body QHK and
has two—or three—point attachment.
The post insulator clamping slot SKS is provided between the cuboid post insulator external contour SAK to which the likewise cuboid post insulator internal contour SIK is adjacent, into which post insulator clamping slot SKS a blanking plate is pushed, after installation of the bushing-type post insulator DFS in the medium—voltage switchgear assembly. The blanking plate, which can be pushed, for example, in from above, fixes in a special manner the relative positions of the bushing post insulators, which are in general fitted alongside one another. With the concentric cross—sectional contour inside the post insulator clamping slot, wide ranges of the post insulator external contour and of the post insulator internal contour are covered by the blanking plate. This results in particularly

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2.1 the post insulator internal contour SIK is provided with a
half-round contour HRK in the region of the adjacent cuboid
hollow body QHK opposite the post insulator guide contour
SFK,
2.2 the half-round contour HRK is provided with a supporting
device TSE which is designed in a trapezoidal shape and is
approximately the same height as the T—shaped connecting
hollow body AIK,
2.3 the post insulator internal contour SXK has an attachment
bracket BFW which is arranged transversely with respect to
the longitudinal direction of the cuboid hollow body QHK
in the plane of the post insulator mounting plate STB.
With the half-round contour HRK of the cuboid hollow body QHK in the upper region, the supporting device TSE., which is designed in a trapezoidal shape, provides additional retention In a simple manner for the busbar mounted above it. With the attachment bracket BFW, which is arranged at the same level as the post insulator mounting plate STD and is arranged transversely with respect to the longitudinal direction of the cuboid hollow body DHK, the bushing—type post insulator DFS can be mounted detachably in a simple manner inside the medium—voltage switchgear assembly.

-6-WE CLAIM:
1. Metalclad, air—insulated medium—voltage switchgear assembly having a number of bushing—type post insulators corresponding to the number of phases, and which bushing—type post insulators have busbar connections and are detachably connected to a post insulator mounting plate, characterized by the following features:
the bushing—type post insulator (DFS) has a cuboid post insulator external contour (SAK) to which a likewise cuboid post insulator internal contour (SIK) is adjacent,
& post insulator clamping slot (SKS) having a concentric cross—sectional contour is provided between the post insulator external contour (SAK) and the post insulator internal contour (SIK),
the post insulator internal contour (SIK) has, in the contact region with the post insulator mounting plate (STB), a post insulator guide contour (SFK) which passes through a recess in the post insulator mounting plate (STB) and whose longitudinal surface (LFL) facing away from the post insulator external contour (SAK) tapers trapezoidally towards the free region,
the post insulator internal contour (SIK) is adjacent to a cuboid hollow body (QHK) which is connected in the region of the

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busbar connection (SSA) to a T-shaped connecting hollow body (AHB) which is arranged at right angles to the longitudinal direction of said hollow body (QHK),
the T-shaped connecting hollow body (AHK) is equipped in the opposite region of the busbar connection (SAA) with an attachment plate (BPL) which overhangs the contour of said hollow body (AHK),
the busbar connection (SSA) has a straight—line external contour (DAK) which is arranged at right angles to the longitudinal direction of the cuboid hollow body (QHK) and has two-or three-point attachment.
2. Metalclad, air—insulated, medium-voltage switchgear assembly according to claim 1, wherein
the post insulator internal contour (SIK) is provided with a half-round contour (HRK) in the region of the adjacent cuboid hollow body (QHK) opposite the post insulator guide contour-
(SFK),
the half-round contour (HRK) is provided with a supporting device (TSE) which is designed in a trapezoidal shape and is approximately the same height as the T-shaped connecting hollow body (AHK),

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the post insulator internal contour (SIK) has an attachment bracket (BFW) which is arranged transversely with respect to the longitudinal direction of the cuboid hollow body (QHK), in the plane of the post insulator mounting plate (STB).
Bushing-type post insulator for a metalclad, air-insulated, medium-voltage switchgear assembly
The invention relates to a metalclad, air-insulated medium-voltage switchgear assembly having a number of bushing-type post insulators (DFS) corresponding to the number of phases, and which bushing-type post insulators (DPS) have busbar connections (SSA) and are detachably connected to a post insulator mounting plate (STB).
The bushing-type post insulators (DFS) have cuboid post insulator external contours (SAK) to which cuboid post insulator internal contours (SIK) are adjacent, between which post insulator clamping slots (SKS) having concentric cross-sectional contours are located, the post insulator internal contours (SIK) containing in the contact region to the post insulator mounting plates (STB) post insulator guide contours (SFK) which pass through recesses in the post insulator mounting plates (STB) and whose longitudinal surfaces (LFL) facing away from the post insulator external contours (SAK) are tapered trapezoidally towards the free region.
Bushing-type post insulators are used in conjunction, with medium-voltage switchgear assemblies for power supply and distribution purposes.


Documents:

01350-cal-19983 abstract.pdf

01350-cal-19983 claims.pdf

01350-cal-19983 correspondence.pdf

01350-cal-19983 description(complete).pdf

01350-cal-19983 drawings.pdf

01350-cal-19983 form-1.pdf

01350-cal-19983 form-2.pdf

01350-cal-19983 form-3.pdf

01350-cal-19983 form-5.pdf

01350-cal-19983 g.p.a.pdf

01350-cal-19983 letters patent.pdf

01350-cal-19983 priority document others.pdf

01350-cal-19983 priority document.pdf

1350-cal-1998-granted-abstract.pdf

1350-cal-1998-granted-claims.pdf

1350-cal-1998-granted-correspondence.pdf

1350-cal-1998-granted-description (complete).pdf

1350-cal-1998-granted-drawings.pdf

1350-cal-1998-granted-examination report.pdf

1350-cal-1998-granted-form 1.pdf

1350-cal-1998-granted-form 2.pdf

1350-cal-1998-granted-form 3.pdf

1350-cal-1998-granted-form 5.pdf

1350-cal-1998-granted-gpa.pdf

1350-cal-1998-granted-letter patent.pdf

1350-cal-1998-granted-priority document.pdf

1350-cal-1998-granted-reply to examination report.pdf

1350-cal-1998-granted-specification.pdf

1350-cal-1998-granted-translated copy of priority document.pdf


Patent Number 201367
Indian Patent Application Number 1350/CAL/1998
PG Journal Number 07/2007
Publication Date 16-Feb-2007
Grant Date 16-Feb-2007
Date of Filing 31-Jul-1998
Name of Patentee SIEMENS AKTIENGESELLSCHAFT
Applicant Address WITTELSBA CHERPLATZ 2, 80333 MUENCHEN,
Inventors:
# Inventor's Name Inventor's Address
1 VOLKAR KOPKE OBERE BUECH 12,91054 BUEKENHOF ,
2 RAINER STOLZ EICHENHEEGE 12B 63477 MAINTAL
3 KARL SCHUDT FRANKFURTER STR. 14,61203 REICHELSHEIM
4 HOLGER DAEUMLING HAUPTSTR. 1C,22885 BARASBUETTEL
5 THOMAS MOSLER, LAUNITZSTR.22 60594 FRANKFURT
6 OLAF BISCHUR HASSELSTR. 36,63762 GROSSOSTHEIM
PCT International Classification Number H 02B 13/45
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 29714254.2 1997-07-31 Germany