JPH0627931Y2 - Transformer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a transformer used for substation equipment, especially for substation equipment for buildings of 33 KV class or less. The present invention relates to an improvement when a space saving structure is provided by providing a container box.

[Conventional technology]

A transformer used in a building or the like is often gas-insulated and class H-insulated in terms of size and weight reduction and safety against fire. This causes the transformer to become quite hot and the insulating gas is heated by the transformer and
The temperature rises to around 0 ° C, and the heat is radiated to the outside from the side plate of the transformer box, but at the same time, it is radiated upward from the upper plate.

[Problems to be solved by the device]

If the primary switch box is placed above the transformer box in order to reduce the space used, the heat generated from the H-type insulation transformer is directly received, resulting in a high temperature and the primary switch box and It is unavoidable that power fuses are heated and adversely affect operation and life. Further, the heat release from the upper surface of the transformer box is largely hindered by the primary switch box.

[Means for Solving the Problems]

In order to solve the above problems, the present invention installs the bottom plate of the primary switch box obliquely as a heat insulating property, and the air heated on the surface of the upper plate of the lower transformer box is blocked along the lower surface of the bottom plate. The structure is such that it flows obliquely upward without being discharged and is discharged to the outside.

〔Example〕

FIG. 1 is a partially cutaway perspective view showing an embodiment in which a primary switch box according to the present invention is attached to the upper part of a transformer box. In the figure, a transformer box and a transformer box are shown in order to simplify the drawing and facilitate understanding. The transformer, the primary switch and other accessories housed inside the primary switch box are omitted, and only the boxes are shown. 2 (a) and 2 (b) are a front view and a side view of an embodiment in which the primary switch box is mounted on the transformer box.

Further, FIG. 3 is a single-line connection diagram of the above-mentioned primary switch box and transformer box, in which the high-voltage side transmission line 1 is introduced into the primary switch box 3 through the cable terminator 2, added to the primary switch 4, and connected from the power fuse 5. It is introduced into the transformer box 7 through the primary bushing 6 and joins the primary side of the gas-insulated transformer 8 and then enters the primary switch box 3 again from the secondary side through the secondary bushing 9 and is withdrawn as it is and the low-voltage switchboard. (Not shown).

In FIGS. 1 and 2, the primary switch box 3 has a front door 3a, and the side plate 3b is provided with a large number of small holes such as a punched steel plate or a wire mesh so that the outside air can freely flow. The upper plate 3c is made of a flat steel plate or the like.

Here, the bottom plate 3d is a heat insulating plate by appropriately adding a heat insulating material to a plate material, and one side (the front door 3a side as an example in FIG. 1) of the two opposite sides is attached to the bottom portion, and the other side is from the bottom portion. The bottom plate 3d is mounted obliquely above the bottom plate 3d. Thus, the outside air can flow freely from the lower part of the side plate 3b to the lower part of the bottom plate 3d. Further, in the transformer box 7 provided below the primary switch box 3, the side plate 7a is made of corrugated steel plate and the like, and the upper plate 7b is made of flat steel plate or corrugated steel plate and the like.

The transformer box 7 contains a gas-insulated transformer and is filled with insulating gas. The heat generated from the transformer is dissipated from the side plate 7a through the insulating gas and is added to the upper plate 7b. To heat the air. The air having a high temperature flows obliquely upward along the lower surface of the bottom plate 3d of the switch box 3, flows out from the lower part of the side plate 3b of the switch box, and fresh outside air flows in.

Thus, the upper plate 7b of the transformer box is effectively cooled, the heated air on the upper plate 7b flows out without staying as described above, and the radiant heat from the high temperature upper plate 7b is insulated. Since it is cut off by the flexible bottom plate 3d, the temperature of the primary switch box 3 does not increase.

It should be noted that a portion attached above the bottom surface of the bottom plate 3d, that is, the other side of the two opposite sides is further projected outward from the side plate 3b, and rises obliquely along the lower surface of the bottom plate 3d to flow out at a high temperature. It is possible to prevent the air from flowing away from the side plate 3b and flowing into the primary switch box 3.

Further, the bottom plate 3d may be attached not only to the other side but also to the opposite one side appropriately above the bottom, and the bottom plate 3d may be arranged obliquely so as to float from the bottom.

[Effect of device]

As described above, according to the present invention, heat can be freely dissipated from the upper plate of the transformer box without being obstructed by the primary switch box, and the primary switch box may become high temperature and the storage parts may deteriorate. Can be eliminated.

[Brief description of drawings]

FIG. 1 is a partially broken perspective view showing an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are the same front and side views, and FIG.
The figure is a single-line connection diagram showing connections inside the primary switch box and the transformer box. 3 ... Primary switch box, 3b ... Side plate, 3d ... Bottom plate, 4
…… Primary switch, 5 …… Power fuse, 6 …… Primary bushing, 7 …… Transformer box, 7b …… Upper plate.

Claims (1)

[Scope of utility model registration request] 1. A transformer box accommodating a gas-insulated transformer, a primary switch mounted on the transformer box, a power fuse and other parts are accommodated therein, and a side plate is provided with a large number of small holes to allow free circulation of outside air. A primary switch box configured as described above, wherein the primary switch box has a bottom plate configured to be heat-insulating, and at least one of the two opposite sides of the bottom plate is attached above the bottom to obliquely attach the bottom plate. Arranged to allow outside air to flow between the bottom plate lower surface and the transformer box upper plate surface through the side plate lower part, and the heated air on the upper plate surface rises diagonally along the bottom plate lower surface. A transformer characterized by flowing out from the lower part of the side plate.