JPH0721050Y2 - Power distribution equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a power distribution device.

(Prior Art) For example, as shown in FIG. 3, a high voltage obtained from a high-voltage terminal is applied to a transformer B via a load switch A, and a low voltage is applied thereto, and then a load is applied via a low-voltage switch C. Power distribution devices designed to supply power supplies are already well known.

Normally, the load switch A and the transformer B are installed on a cubicle type high-voltage board D, the low-voltage switch C is installed on another low-voltage board E, and both boards D and E are arranged next to each other. Will be placed. Conventionally, the transformer B is a molded transformer or a panel radiator type transformer.

(Problems to be solved by the invention) However, when a molded transformer is used, since the charging part is exposed, it is covered with a metal case having an insulation dimension in the air. Therefore, the size must be increased. Moreover, since the charging part is not shielded, you cannot approach while driving for safety. Therefore, when maintenance is required, a power failure is required, which is extremely inconvenient.

Further, when a panel radiator type transformer is used, since the panel radiator projects to the front, when the high-voltage panel D and the low-voltage panel E are installed side by side, the panel radiator projects from the high-voltage panel D, which is compact. It hinders the layout.

The purpose of this invention is to make this kind of power distribution device compact and simple.

(Means for Solving the Problems) The present invention uses a hermetically sealed gas-insulated transformer with heat-radiating fins on the outer periphery as a transformer, thereby constituting a power distribution device. Is characterized by.

(Operation) Since the transformer is not provided with the panel radiator, there is no protruding portion, and therefore the layout of the electric device can be made compact. Further, since it is a completely sealed type, the charging part is not exposed and maintenance-free.
Moreover, since it is a gas-insulated transformer, the distance from the surrounding case can be reduced, and the size can be made compact.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a hermetically sealed gas-insulated transformer having a heat radiating fin 2 on its outer circumference.

Specifically, a corrugated iron plate (iron plate with multiple folds formed at appropriate intervals) is wound into a cylinder to form a tank, inside of which the transformer main body together with insulating gas (for example, SF ₆ gas) It is configured by enclosing it. The pleats described above are used as fins. The opening / closing door on the front of the load switch box 3 is omitted in FIG.

A load switch box 3 is provided on the upper part of the transformer 1 through an insulating shield plate.
Is installed. The load switch box 4 is housed inside the load switch box 3. In addition to this, if necessary, an air bushing for a connector used for connecting cables, a low-voltage bus bar, and instruments are stored.

Reference numeral 5 is a low-voltage board accommodating a low-voltage switch (low-voltage switch C in FIG. 3). As shown in FIG. 2, the low-voltage board 5 is arranged in parallel with the transformer 1 in which the load switch box 3 is mounted.

When the transformers 1 are arranged side by side, the transformer 1 is required to be manufactured so that the depth of the transformer 1 is not longer than that of the low voltage panel 5. However, such a requirement can be easily realized because the transformer 1 is a completely sealed type and has a fin.

(Effect of device) As described in detail above, according to this device, as a transformer,
Since the one with fins on the outer circumference is used, there is no panel radiator, so there is no protrusion so that the layout of electrical equipment can be made compact and the transformer is completely sealed. Therefore, the charging part is not exposed and maintenance-free. Furthermore, since it is a gas-insulated transformer, it is possible to reduce the distance from the surrounding case, and it is possible to obtain a compact board. .

[Brief description of drawings]

FIG. 1 is a perspective view of a main part according to an embodiment of the present invention, FIG. 2 is a front view of the embodiment of the present invention, and FIG. 3 is a wiring diagram of a power distribution device. 1 ... Transformer, 2 ... Fin, 3 ... Load switch box. 4 ...
… Load switch, 5… Low-voltage panel,

Claims (1)

[Scope of utility model registration request] 1. A load in which a load switch connected between the transformer and a high-voltage terminal is housed in the upper part of a hermetically sealed gas-insulated transformer having heat-radiating fins on the outer periphery. A power distribution device comprising a switch box, and a low-voltage panel in which a low-voltage switch for supplying the output of the transformer to a load is installed in parallel with the transformer.