JPH04355611A - High voltage distribution facility for building - Google Patents

Abstract

PURPOSE:To obtain a high voltage distribution facility for a building, in which a space in the building can be effectively used and standardization of a building construction and a shortening of a construction term are attained by employing a transformer facility of an outside dimensions responsive to power capacity. CONSTITUTION:Bushings 12 of transformer units 6a, 6b are passed through an opening 5b of a wall of a cable shaft 4 to be installed. Outer boxes 11 of the units are disposed out of the shaft, and the boxes are installed by butting to the wall of the shaft. A high voltage distribution facility in which the shaft can be reduced in size and transformer units responsive to power capacities can be used, can be provided, and a term of a building construction can be shortened.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to power receiving and distributing equipment used in buildings and the like.

0002

2. Description of the Related Art FIG. 3 is a cross-sectional view showing the installation state of conventional power receiving and distribution equipment disclosed in, for example, Japanese Patent Application Laid-Open No. 61-8645. The power receiving equipment 3 is a high voltage distribution trunk cable that supplies high voltage power from the power receiving equipment 2. In this building, cable shafts 4 are provided on both sides as a passage for the high voltage distribution trunk cable 3, and a transformer 6 is fitted into the wall opening 5a of the inner wall 5 of this passage. It is connected.

Next, the operation will be explained. In order to supply power to each floor in the building 1, high-voltage power received by the power receiving equipment 2 is supplied to the transformer 6 via the high-voltage trunk cable 3. This transformer device 6 distributes the stepped down low voltage power to each floor. FIG. 2 is a circuit diagram of a transformer, where 7 is a primary switch, 8 is a transformer, receives high voltage power from a cable connection 9, steps down the voltage, and supplies low voltage power from a distribution circuit breaker 10. . 11 is an outer box of the transformer, and 12 is a cable connection bushing.

0004

[Problems to be Solved by the Invention] As described above, in conventional power receiving and distribution equipment, the main body of the transformer is fitted into the opening of the cable shaft, so it is necessary to determine the dimensions of the cable shaft based on the power capacity. Since it was planned to be able to install a large number of objects, it had the disadvantage of being large. Another problem was that when the capacity was small, it was necessary to cover the opening with a cover or the like.

[0005] This invention was made in order to solve the above-mentioned problems, and it is possible to reduce the cable shaft size, to flexibly respond to changes in power capacity, and to provide a cable for buildings that does not require blocking of openings. Its purpose is to provide high-voltage power distribution equipment.

[0006]

[Means for Solving the Problems] The high-voltage power distribution equipment for buildings according to the present invention includes inserting and penetrating the bushing of the transformer into the opening in the wall of the cable shaft, and abutting the outer box of the transformer against the wall of the cable shaft. It was installed by

[0007]

[Operation] Since the transformer according to the present invention is installed outside the cable shaft, it can be sized appropriately according to the power capacity. Additionally, since the outer box of the transformer is butted against the wall of the cable shaft, it can be used as a cover to close the opening.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the installed state of power receiving and distribution equipment.
In the figure, 1 to 5 are the same as those in FIG. 3, and 5b is an opening large enough for the bushing of the transformer to fit into. Bushings 12 of transformers 6a and 6b having different power capacities are fitted into each opening. , the outer box 11 is installed against the wall 5. The high voltage trunk cable 3 is then connected to a cable connection portion 9 attached to the bushing 12. Note that 6b is a transformer having a larger power capacity than 6a, and can respond to changes in external dimensions.

Next, the operation will be explained. In order to supply power to each floor in the building 1, power is received by the power receiving equipment 2, and the high voltage power is supplied to the transformers 6a and 6b via the high voltage trunk cable 3, and the transformers 6a and 6b then distribute the stepped down low voltage power to each floor. do. Note that the electric circuit of the transformer is the same as the conventional example shown in FIG. Since the bushing 12 is passed through the wall opening 5b of the cable shaft 4 and the outer box 11 is installed outside the cable shaft, even if the power capacity of each floor is different,
, 6b may have appropriate external dimensions. Further, since the outer box 11 of the transformer is installed against the wall surface of the cable shaft, the outer box covers the opening of the cable shaft and exhibits the effect of a cover.

[0010] As described above, the effective use of building space and the effect of shielding covers have been explained, but for building construction, by determining the standard dimensions of cable shafts and openings, it is possible to standardize the design and shorten the construction period. We can expect it to be shortened.

[0011]

[Effects of the Invention] As described above, according to the present invention, the bushing of the transformer is passed through the cable shaft opening,
Since the outer box is installed outside the cable shaft, it is possible to reduce the size of the cable shaft and flexibly adjust the external dimensions of the transformer, allowing for effective use of building space, as well as eliminating the need for covers and providing inexpensive power distribution. Equipment is available. It also makes it possible to standardize cable shaft dimensions and shorten building construction time.

[Brief explanation of drawings]

[Fig. 1] A cross-sectional view of the installation of high-voltage power distribution equipment for a building according to an embodiment of the present invention.

[Figure 2] Circuit diagram of transformer

[Figure 3] Installation cross-sectional view of conventional high-voltage power distribution equipment for buildings

[Explanation of symbols]

4 Cable shaft 5b
Wall openings 6a, 6b Transformer 11 Outer box 12 Bushing

Claims (1)

[Claims] [Claim 1] Insert the cable connection bushing of the transformer into the opening in the wall of the cable shaft, place the outer box outside the cable shaft, and close the opening by butting the outer box against the wall of the cable shaft. High-voltage power distribution equipment for buildings that is characterized by: