JPH0140563B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device that is small in size and can be installed outdoors to cope with urban overcrowding.

A simple power supply device is one in which a prefabricated unit containing a switch and a prefabricated unit containing a transformer are connected via a high-voltage bus bar, and installed in a rented room in an apartment building such as an apartment building. According to this power supply device, since the high voltage busbars connecting the units are connected by a plug-in method, the workability of arrangement and assembly is good, and the whole device can be made relatively compact.

However, due to its configuration, this power supply device cannot be installed outdoors, and because the switch and transformer are connected by a high-voltage bus, the overall structure is small for insulation reasons. There are limits to In particular, as cities become more densely populated, a high degree of building density will occur, and each building will be equipped with its own power receiving device. As a result, the overhead supply of electricity has decreased, and it has become difficult to supply electricity overhead only to customers who have been left behind due to the building construction phenomenon, for example. At the same time, in housing complexes such as condominiums, it is becoming extremely difficult to provide space for installing a power supply device, so there is a demand for a compact power supply device that can be installed outdoors.

In view of the above, the present invention provides a shielding layer on the molded insulator of the high voltage section and arranges each phase in close contact with each other in order to make it compact and able to be installed outdoors such as on rooftops, and to cope with urban overcrowding. To provide a power supply device which is made compact by incorporating a fuse in a disconnector, has a watertight structure for the disconnector, etc., and is entirely housed in a waterproof housing.

Hereinafter, the power supply device according to the present invention will be explained in detail.

Figures 1A and 1B show an embodiment of the present invention, which is composed of a main body 1 and a door 2, and has a waterproof structure housing 3 (installed on a rooftop etc. via a base 4), and a , a high-voltage cable 5 guided to the housing 3, a direct-coupled cable head 6 provided at the end of the high-voltage cable 5, and a high-voltage cable 5 connected via the direct-coupled cable head 6.
and an automatic switch 8 that performs an opening/closing operation between the mold bus bar 7 (described later) (automatic opening/closing can be performed remotely by operating the mechanism section 8a, but manual operation is also possible), and the mold bus bar 7 described above. (Each phase is EP rubber molded, and the outer layer is coated with zinc powder to form a conductive layer, so that the three-phase busbars are compactly overlapped.) A disconnector with a fuse ( a transformer 10 (the high-voltage winding lead wire 10a is connected to one fixed electrode of the fuse disconnector 9 via a bushing 10b),
A low voltage switch 12 with a fuse that performs an opening/closing operation between one fixed electrode connected to the low voltage winding lead wire 10c of the transformer 10 via a bushing 10d and another fixed electrode connected to the low voltage electric wire 11; (The low-voltage wire 11 has 3 wires including the neutral wire 11a.
A phase 4-wire line is formed to supply low-voltage power to consumers).

FIG. 1C shows a circuit diagram of the embodiment of the present invention shown in FIGS. The fuse-equipped disconnector 9 is connected by the molded busbar 7, and the output of the fuse-equipped disconnector 9 is inputted to the high voltage terminal of the transformer 10.
The low voltage output is supplied to the low voltage electric wire 11 via a low voltage switch 12 with a fuse.

The above circuit configuration is configured as one customer line, but as shown by the dotted line, if a high voltage cable 5', direct connection type cable head 6', and switch 8' are further installed, a π-type line can be configured.

Figure 2 shows a disconnector 9 with a fuse, and the transformer 1
Mounting surface 21 forming part of 0 (Fig. 1 A, B, C)
High voltage winding 10 from bushing 10b fixed to
A (FIG. 1B) is connected to a high voltage terminal 23 protrudingly provided, and the high voltage terminal 23 is connected to a fixed electrode 24 having an elastic fitting force. A part of the bushing 10b is shown as a fixed mold 25a, and the fixed mold 2 located below it
5b and has a symmetrical shape. The fixed mold 25b has mold busbars (A, B, B in Fig. 1) inside.
C), and both fixed molds 25a and 25b have an arc extinguishing chamber 26 and an arc extinguishing rod 27 arranged coaxially. The arc extinguishing chamber 26 is held in place by a rubber packing 28 which serves both waterproof and cushioning functions. On the other hand, the closing rod 29 fitted into the fixed molds 25a and 25b has a fuse accommodating portion 30 that accommodates a current limiting fuse 34 and a pair of leg portions 31, and both portions 30 and 31 are integrally made of, for example, epoxy resin. The inner peripheral surface is molded into a cylindrical shape. The fuse accommodating portion 30 has a lid 3 that closes openings provided at both ends of the fuse accommodating portion 30 by joining.
2 (transparent and made of acrylic resin or the like), and provides a watertight structure via rubber packing 33. The housed current limiting fuse 34 has an electrode 34a, which is provided on the leg portion 31 and connected to a movable electrode 36 and a current collecting electrode 35, and also has a fusing indicator that can be seen through the transparent lid 32. 3
4b. A rubber packing 37 is provided between the base of the leg portion 11 and the fixing molds 25a, 25b to perform both waterproofing and buffering functions, and a connecting portion 38 and a guide fitting 39 for connecting and fixing the operating rod to the fuse housing portion 30 are provided. is installed.

According to the configuration of this fuse-equipped disconnector 9, in addition to disconnecting the charging circuit, it can also be provided with the ability to switch small load currents, without affecting the current-limiting fuse 34 from the heat of the transformer 10. A current limiting fuse and a disconnector can be integrated with a compact shape. In particular, since the fitting part is cylindrical and vertically symmetrical, highly reliable watertightness and a simple structure of the joint between the transformer 10 and the mold bus bar 7 can be achieved.

According to the power supply device of the present invention explained in FIG. 1 A, B, C and FIG. Each phase can be arranged in close contact with each other for a compact structure, and the fuse-equipped disconnect switch 9 has been watertightly integrated with the fuse and disconnect switch, which were conventionally arranged separately in series, so it can be compactly assembled and In addition to being housed in a waterproof housing that can be avoided, the device is connected to the transformer provided at the back of the housing via a through bushing, making it possible to make the entire device compact.

As explained above, according to the power supply device according to the present invention, each phase is closely arranged by providing a shielding layer on the molded insulator of the high-voltage section, and the disconnector has a built-in fuse to make the disconnector more compact. It has a cylindrical symmetrical shape, has a watertight structure, and is housed entirely in a wind- and rain-proof housing, making it compact and able to be installed outdoors, such as on the roof of a building, making it suitable for urban overcrowding.

[Brief explanation of drawings]

FIGS. 1A, 1B, and 1C are explanatory diagrams showing one embodiment of the present invention. FIG. 2 is an explanatory diagram showing a fuse-equipped disconnector according to an embodiment of the present invention. Explanation of symbols 1...Case body, 2...Door, 3...Housing, 4...Base, 5...High voltage cable, 6...
Cable head, 7...Mold busbar, 8...Switch, 9...Disconnector with fuse, 10...Transformer, 11
...Low voltage electric wire, 12...Switch with fuse.

Claims (1)

[Claims] 1. A device comprising a pair of fixed electrodes and a movable electrode that opens and closes the fixed electrodes, one of the fixed electrodes is connected to a high voltage cable, and the movable electrode is made to open and close by remote control. A switch equipped with a mechanical part, and one end connected to another fixed electrode of this switch,
It has a mold bus bar in which each phase is closely laminated by having a shielding layer on the outermost layer, and a pair of fixed electrodes each having an arc-extinguishing part, one of the fixed electrodes is connected to the other end of the mold bus bar. a connected disconnector with a fuse; a high-voltage terminal connected to another fixed electrode of the disconnector with a fuse; a transformer having a low-voltage terminal that outputs a low voltage for consumers; and the low-voltage terminal of the transformer. has a low-voltage electric wire that supplies low-voltage power to the load via a fuse-equipped switch connected to the fuse-equipped switch, and the fuse-equipped disconnector and the fuse-equipped switch are located at the front side of a housing having an opening/closing door. The transformer is located in the rear wall of the housing, and the molded busbar is located in the rear part of the housing, so that the transformer is located in a three-dimensional manner in front and rear. A power supply device characterized in that the power supply device is connected to the fuse-equipped disconnector and the fuse-equipped switch via watertight bushings.