JP2891067B2 - switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a switchboard used for high-voltage power distribution equipment.

[0002]

2. Description of the Related Art FIG. 3 is a front view of a switchboard of a conventional high-voltage receiving and distributing facility. A transformer board 3 having a transformer for converting to a voltage is a low-voltage board that uses a low-voltage power source stepped down by the transformer board 2 as a main power source and distributes the power to a load. Figure 4 shows the transformer panel 2
5 is a transformer, 5 is a transformer, 6 is a high-voltage horizontal bus for leading the high-voltage power supply from the high-voltage draw-in board 1 in the row direction, and 7 is branched from the high-voltage horizontal bus 6 by a high-voltage insulated wire 8. The other terminal of the load switch with a fuse is connected to the high voltage side terminal of the transformer 5. 9 is a low-voltage horizontal bus connecting between the transformer board 2 and the low-voltage board 3, 10 is a low-voltage bus connecting the low-voltage terminal of the transformer 5 and the low-voltage horizontal bus 9, and 11 is a transformer board. A ventilator for releasing the heat generated in 2 from the upper part of the panel to the outside; 12 a meter for monitoring the condition in the transformer panel 2; 13 a ventilation hole for taking in air into the transformer panel 2;
Is a circuit breaker for wiring, which is arranged in the low-voltage board and connected to each load to protect the low-voltage circuit on the load side. FIG. 5 shows the configuration of FIG. 3 in a single line diagram.

[0003] Next, high-voltage power distribution equipment will be described. When receiving power, general consumers receive power at high voltage according to the installed capacity. When power is actually used as energy, it receives high voltage, transforms it with a transformer, and supplies power to each load as low voltage. The high-voltage circuit to which the high-voltage power supply is drawn by the high-voltage drawer 1 constitutes a high-voltage circuit by the high-voltage horizontal bus 6 of the high-pressure drawer 1 and the high-voltage horizontal bus 6 of the transformer board 2. When power is supplied to the transformer 5, a load switch 7 with a fuse for protecting circuits below the transformer 5 is provided at a branch from the high-voltage horizontal bus 6. The load switch 7 with a fuse is an integrated fuse and load switch. The fuse protects against short-circuit, and the load switch switches the load. When a high voltage is transformed into a low voltage by the transformer 5, heat is generated in the transformer 5 body. The instrument 12 monitors the influence of heat at that time. A vent hole 13 is provided on the door surface to radiate the generated heat to the outside of the panel. The ceiling of the transformer panel 2 is provided with a ventilator 11 for discharging warmed air in the panel. The power is transformed to a low voltage by the transformer 5 and the power is supplied to the transformer 5.
Is connected to the low-voltage horizontal bus 9 by the low-voltage bus 10, power is supplied to each load via the low-voltage horizontal bus 9 via the circuit breaker 14. Circuit breaker 14 for wiring
Protects the low-voltage circuit and operates when an accident occurs on the load side to prevent the accident from spreading to the upstream side.

[0004]

The switchboard that houses the conventional transformer in the panel is constructed as described above.
The heat generated by the transformer must be released outside the panel,
It is necessary to provide a structure with ventilation holes on the door and a ventilator on the ceiling, which increases the cost and shortens the life of the equipment inside the panel due to the influence of heat. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The heat generated from a transformer is directly released to the outside of a panel to reduce the influence of the heat of equipment stored in the panel. The purpose is to reduce the cost by adopting a simple structure.

[0006]

SUMMARY OF THE INVENTION The switchboard according to the invention, the bus unit to the top of the transformer, the switchboard of the one unit that is disposed a low pressure plate on the side of the transformer, this load magnitude A plurality of switchboards are juxtaposed according to the conditions.

[0007]

According to the switchboard of the present invention , the radiator of the transformer is provided.
Improving the heat dissipation effect by directly exposing it to the outside of the panel
In addition, since the required number of switchboards of the basic configuration are arranged in parallel according to the size of the load, the configuration planning becomes easy.

[0008]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a switchboard of the high-voltage power distribution equipment of the present invention, and FIG. 2 is a side sectional view showing a section AA of FIG. Reference numeral 21 denotes a heat sink, that is, a transformer having a heat radiating portion provided around it, 22 denotes a tunnel portion penetrating in the front-rear direction of the panel,
Reference numeral 23 denotes a bus unit installed above the transformer 21.
High-voltage horizontal bus (bus) 6 extending in the direction of arrangement of the boards inside
And a load switch 7 with a fuse connected in a form branched from a high-voltage horizontal bus 6 by a high-voltage insulated wire 8. The other terminal of the load switch with fuse 7 and the high voltage side terminal of the transformer 5 are connected. Reference numeral 24 denotes a measuring instrument for monitoring the state of the transformer 21 main body.

The bus unit 23 has a door structure with a double door on the front surface, and has a structure in which the internal equipment can be easily operated and maintained by opening the door. Bus unit 2
In the upper part of the panel 3, a number of high-voltage horizontal buses 6 corresponding to the required number of phases are arranged extending in the arrangement direction of the boards. The high-voltage horizontal bus 6 can be divided into bus units. The load switch 7 with a fuse is connected to a high-voltage side terminal (primary side) of the transformer 21. The measuring device 24 is attached to the main body of the transformer 21, and the door of the bus unit 23
A viewing window is provided so that the measuring instrument 24 can be seen. The upper surface of the transformer 21 and the lower surface of the bus unit 23 are connected for connection, but the transformer 21 and the bus unit 23 are transported to the installation site in an assembled state. Therefore, the bus unit 23 has a bus bar connecting portion with the adjacent board on both left and right side surfaces. In the heat radiation of the transformer 21, heat generated inside the transformer 21 is transmitted by conduction to a heat radiating plate provided around the main body of the transformer 21, and radiated from the heat radiating plate on the principle of convection of air. The radiated heat is directly radiated to the outside of the panel from the front and rear tunnels of the transformer 21.

Embodiment 2 FIG. It should be noted that the above-described embodiment uses the transformer 21
A tunnel portion penetrating in the front-rear direction of the panel is provided at a lower portion of the panel in which the heat radiating portion of the transformer 21 is arranged. In the tunnel portion, a radiating portion of the transformer 21 is provided. If a bus unit with a width equal to or greater than the width of the transformer including the heat sink is provided, another panel is connected and arranged adjacent to this bus unit, resulting in the formation of a tunnel section. The same effects as in the above embodiment can be obtained.

Embodiment 3 FIG. At the top of the transformer, a bus unit containing a high-voltage horizontal bus and a load switch with a fuse is used as a distribution panel with a low-voltage board on the side of the transformer as one unit. By disposing a plurality of these switchboards in the direction, it is possible to easily configure power distribution equipment that meets the demand.

[0012]

As described above, according to the present invention, since the transformer main body is taken out of the switchboard, the heat radiation effect of the transformer can be enhanced, and the heat generated by the transformer can be applied to the storage equipment. The effect can be reduced and the life of the equipment can be extended. In addition, by arranging the bus unit above the transformer, the structure of the panel can be simplified, the material can be reduced, and the workability can be improved, so that the production cost can be reduced and an inexpensive switchboard can be provided. .

[Brief description of the drawings]

FIG. 1 is a front view of a switchboard of a high-voltage power distribution equipment according to an embodiment of the present invention.

FIG. 2 is a side sectional view taken along section BB in FIG. 1;

FIG. 3 is a front view of a switchboard of a conventional high-voltage power distribution equipment.

FIG. 4 is a side sectional view taken along section AA of FIG. 3;

FIG. 5 is a single-line connection diagram showing the configuration of the switchboard of FIG. 1;

FIG. 6 is a front view of a switchboard of a high-voltage power distribution equipment showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-voltage draw-in board 2 Transformer board 3 Low-voltage board 6 High-voltage horizontal bus 7 Load switch with fuse 9 Low-voltage horizontal bus 10 Low-voltage bus 14 Circuit breaker 21 Transformer 22 Tunnel part 23 Bus unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-125501 (JP, U) JP-A 63-81606 (JP, U) JP-A 63-187504 (JP, U) JP-A 62- 178708 (JP, U) Shokai Sho 61-65806 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02B 1/56 H02B 1/30

Claims (1)

(57) [Claims] 1. A distribution board having a bus unit on an upper part of a transformer and a low-voltage board on a side of the transformer, a bus extending in a direction in which the boards are arranged in the bus unit, and the transformer and the A switchboard, wherein a combination of a bus unit and the low-voltage board is juxtaposed laterally according to the number of loads.