JP2549829Y2 - High pressure cutout for installation on construction transformers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage cutout to be mounted on a construction transformer directly mounted on a transformer.

[0002]

2. Description of the Related Art Conventionally, in the construction of a distribution line, a bypass vehicle for bypassing a power outage section and a transformer vehicle for securing power supply to a low-voltage customer in the construction section have been used.
This type of transformer car is equipped with a transformer and a cut-out switch that protects the primary side of this transformer.A box-shaped cut-out switch is provided on the back of the body insulator against the support frame near the transformer. It was fixed with the provided mounting bolts.

[0003]

However, since this kind of cutout is used for construction work, it is required that the lid be opened and closed more than 5,000 times. In other words, the durability against the opening / closing operation is considerably required as compared with the case where the number of durable opening / closing operations of the ordinary pole apparatus is about 300.

In such a construction cutout, if a bolt is directly attached to a transformer as in the prior art, the transformer is subjected to a shock due to an impact force generated when the lid is opened and closed during repeated opening and closing operations. There was a risk that the mounting bolt of the cutout for the container might be loosened.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a construction cutout capable of reliably meeting the requirement that the number of times the lid is opened and closed durably is about 5,000 or more.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention forms a mounting flange in a cutout, and stud bolts are implanted in a transformer case.
The gist of the present invention is to fix the cutout to the transformer case by screwing a stud bolt to a nut via a mounting bracket covering the mounting flange.

[0007]

In the present invention, since the mounting flange is formed on the cutout and is fixed via the mounting bracket covering the mounting flange, an impact force generated when the lid is opened and closed is applied to the entire mounting bracket. Since the components are dispersed, the mounting bolt is less likely to be loosened even if the opening and closing operations are repeated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a cut-out mounting box 1a is provided on an upper part of a case 1 of a transformer A, and a body insulator 2 of a cut-out B is vertically mounted on the cut-out mounting box 1a. ing. This body insulator 2
The mounting flange 3 is provided on the rear surface 2a (the left surface in FIG.
The stud bolt 4 is implanted in the cut-out mounting box 1a of the case 1 of the transformer A.
The stud bolt 4 has a nut 31 via a pair of mounting brackets 5 provided so as to cover the mounting flange 3.
The main body insulator 2 is attached and fixed to the cut-out mounting box 1a of the case 1 of the transformer A via the mounting bracket 5 by tightening the nut 31.

As shown in FIG. 3 and FIG.
Has a front L-shape. At both end portions and corner portions, insertion holes 6 through which the stud bolts 4 pass are formed, and each outer peripheral edge is formed by bending. The ends of the two mounting brackets 5 are arranged so as to overlap and surround and cover the mounting flange 3 of the main body insulator 2.

Further, a protruding piece 5a protrudes from one side of a long portion of each mounting bracket 5, and is fitted and positioned in a concave portion 2c formed on both sides of the main body insulator 2. Case 1
A mounting hole 7 is formed in the cutout mounting box 1a, and a penetrating projection 8 is formed on the back surface 2a of the main body insulator 2 so as to be inserted through the mounting hole 7 into the inside of the case 1. A metallized layer 9 is formed on the outer periphery of the base end of the penetrating projection 8,
An insulating film 10 is formed on the upper surface of the metallized layer 9. A packing 11 a and an O-ring 11 are provided between the cutout mounting box 1 a of the case 1 and the body insulator 2.
b is interposed.

On the other hand, as shown in FIGS. 1 and 3, the upper portion of the front surface 2b of the main body insulator 2 is formed to protrude forward to form an eave portion 12, and the upper surface of the eave portion 12 has an end. A rib 13 is formed along the portion.

As shown in FIG. 1 and FIG.
A power-supply-side electrode chamber 15 and a load-side electrode chamber 16 defined by partition walls 14 are formed in the power supply side. The two electrode chambers 15, 16
A nut member 17 is planted on the inner bottom of the nut.
, So that it is detachably fixed. This connection piece 19 is L
The arc-extinguishing chamber 22 is connected to the connection piece 19 in each of the electrode chambers 15 and 16 by a screw 2.
3 attached.

A connecting portion 2d is formed in the upper part of the main body insulator 2 to project in a cylindrical shape, and a connecting conductor 26 is buried between the connecting portion 2d and the power supply side electrode chamber 15. A female electrode 24 is attached to the upper end of the connection conductor 26, and an insulating cap 25 is placed over the upper opening. The lower end of the connection conductor 26 is connected to the connection piece 19 of the power supply side electrode chamber 15 by a screw 27. A male screw 2e is formed on the outer periphery of the base end of the connection portion 2d, and can be screwed with a connection cable (not shown).

An electrode 28 is implanted at the tip of the penetrating protrusion 8, and the electrode 28 is connected to the fixed electrode 20 of the load-side electrode chamber 16 via a connecting conductor rod 29. The electrode 28 is connected to the primary side of a transformer housed in the case 1.

On the other hand, a lid insulator 3 is provided in front of the main body insulator 2.
0 (indicated by a two-dot chain line in FIG. 1) is attached by a shaft 32 so as to be openable and closable, and a current limiting current provided with a pair of contact blades for connecting or opening the fixed electrodes 20 inside the lid insulator 30. A fuse (not shown) is detachably mounted.

A low-voltage switch S connected to the secondary side of the transformer A is fixed at the center of the case 1 of the transformer A. In the present embodiment, since the mounting flange 3 is formed in the cutout and is fixed via the mounting bracket 5 covering the mounting flange 3, an impact force generated when the insulating lid 30 is opened and closed is subjected to an impact force. 5 stud bolts 4 even if opening and closing operations are repeated.
Is less likely to loosen the nut 31 screwed into the nut. Therefore, even if the opening / closing operation is repeated, there is little possibility that the stud bolt 4 is loosened, and it is possible to reliably meet the requirement that the number of times the insulating lid 30 is durably opened and closed is about 5,000 or more.

The protruding piece 5a of each mounting bracket 5 is
Is positioned by fitting into the concave portion 2c of
Positioning when the cutout B is mounted on the case 1 can be easily performed. Further, when the cutout B is replaced, the mounting direction of the cutout B is determined, and the mounting operation is facilitated.

Further, since the cutout B is mounted vertically to the case 1 of the transformer A, the weight of the cover insulator 30 provided with the current limiting fuse on the fixed electrode 20 is not increased, and it is necessary for energization. It can be a minimum contact pressure.
Further, since the current limiting fuse and the fixed electrode 20 are in contact with the minimum necessary contact pressure, the opening and closing operation of the lid insulator 30 is easy.

Further, since the eaves portion 12 is formed, the body insulator 2 of the cutout B is connected to the case 1 of the transformer A.
Cutout B from the opening / closing portion between the main body insulator 2 and the lid insulator 30 even if it is mounted vertically to the side wall 1a of
No rainwater enters the interior. Furthermore, since the ribs 13 are formed, rainwater does not flow to the open / close portion side of the main body insulator 2 and the lid insulator 30, and the rainwater is more reliably prevented from entering the cutout B. .

It should be noted that the present invention is not limited to the above embodiment, but can be arbitrarily changed without departing from the spirit of the present invention.

[0021]

As described in detail above, in the present invention, even if the opening / closing operation is repeated, the mounting bolt is less likely to be loosened, and the number of times the lid can be opened / closed approximately 50 times.
It is possible to reliably respond to the request that the number of times is 00 or more.

[Brief description of the drawings]

FIG. 1 is a sectional view of a high-pressure cutout according to an embodiment of the present invention.

2A is a cross-sectional view of a transformer, and FIG. 2B is a plan view.

FIG. 3 is a perspective view of a high pressure cutout.

FIG. 4 is a front view of the main body insulator.

FIG. 5 is a front view of a mounting bracket.

[Explanation of symbols]

1 Case, 3 mounting flanges, 4 stud bolts, 5 mounting brackets, 31 nuts, A transformer, B cutout.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruo Kamiya 1-20-31 Sakae, Naka-ku, Nagoya-shi Toenec Co., Ltd. (72) Inventor Toshiaki Fujita 1-Ue-Kobari, Inuyama-shi, Aichi Energy Support Co., Ltd. (56) References JP-A-3-285226 (JP, A) Actually open Showa 54-1449651 (JP, U) Actually open 61-184259 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A mounting flange (3) is formed in a cutout (B), and a stud bolt (4) is implanted in a case (1) of a transformer (A) to cover the mounting flange (3). By screwing the stud bolt (4) to the nut (31) via the mounting bracket (5),
A cutout for construction, wherein the cutout (B) is fixed to the case (1) of the transformer (A).