JPH10313512A - Switchboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the workability and the safety by setting the size in the height direction of a chamber for containing circuit breakers stacked in two stage such that the upper circuit breaker chamber is shorter than the lower circuit breaker chamber thereby reducing the height. SOLUTION: A circuit breaker chamber 3 is sectioned into upper and lower circuit breaker chambers 3a, 3b by an intermediate plate 5 provided on the circuit breaker chamber 3 side and a load cable 8 is led in from the underside. The upper circuit breaker chamber 3a is made smaller than the lower circuit breaker chamber 3b. According to the structure, the height of a switchboard can be reduced by the dimensions at the part 12 of a load cable terminal part 11 surrounded by an insulating member corresponding to the upper circuit breaker chamber 3a. Consequently, the workability and the safety can be enhanced.

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 two-stage switchboard of a substation facility.

[0002]

2. Description of the Related Art The height of a two-stage distribution switchboard for high-voltage power receiving and transforming equipment has been conventionally 2.3 m. The reason is that the height of the upper circuit breaker room and the lower circuit breaker room is set to half of the overall size, and the direction in which the load cables corresponding to each circuit breaker room are pulled out from the panel is upward. This is because, even on the lower side, the standard is such that the dimensions of the cable terminal section surrounding the insulating member can be secured in the panel. As a known example of such a technique, there is Japanese Utility Model Laid-Open No. 153409/1986.

[0003]

In the above prior art,
Regardless of whether the direction of pulling out the load cables corresponding to the upper and lower circuit breaker rooms from the switchboard is on the upper side or lower side, standardization has been made so that the dimensions surrounding the insulation of the cable terminals can be secured inside the panel. However, the cable actually laid is either an upper drawer or a lower drawer, and there is a useless area in the switchboard. For this reason, the height of the switchboard is increased, and the standard size of the high-voltage two-stage switchboard is 2.3 m. On the other hand, when manufacturing a switchboard or installing it at the place of use, there are many cases where the work is performed by climbing to the ceiling of the switchboard. Work at a height of 2.0 m or more requires a lifeline or handrail as a fall prevention measure, and the conventional standard height of 2.3 m has been a problem of reduced workability. In addition, there is a problem that the work is carried out on the table at the time of mounting the equipment on the ceiling portion and performing the power distribution work, which is dangerous and lowers the workability.

[0004]

In order to solve this problem, the size of the circuit breaker room in which the circuit breakers stacked in two stages are stored in the height direction is determined by the upper circuit breaker room. It was configured to be smaller than the room. When the load cable is drawn in from the upper side, a cable processing chamber for the size of the insulating member surrounding the load cable terminal corresponding to the upper circuit breaker chamber is further provided above the switchboard.

Since the upper breaker room is configured to be smaller than the lower breaker room, when the load cable is drawn in from the lower side, the load cable terminal portion corresponding to the upper breaker room has an insulation member surrounding dimension. The height of the switchboard can be reduced. In addition, the same dimensions and structure as when the load cable is pulled in from above are provided, and by providing a cable processing chamber above the load cable, it is possible to ensure the dimensions surrounding the insulating member of the load cable terminal.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIG.
This will be described below.

FIG. 1 shows a configuration in which a load cable is drawn in from a lower side into a high-voltage two-stage switchboard to which the present invention is applied.

A circuit breaker room 3 and a conductor room 4 are formed in the switchboard 1 via a partition plate 2 provided in the switchboard 1, and an intermediate plate 5 provided on the circuit breaker room 3 side of the partition plate 2. Circuit breaker room 3
Are divided into an upper circuit breaker room 3a and a lower circuit breaker room 3b, and a disconnecting portion 6 is provided on the partition plate 2 of each circuit breaker room 3, and a terminal of the circuit breaker 7 is provided on the disconnecting portion 6 side of the circuit breaker room 3. Is connected.
The other terminal of the circuit breaker 7 is connected to the bus 10 via another disconnection part.
Connected to. In the partition plate 2 in the lower circuit breaker room 3b,
An inspection cover 13 for inspecting the condition of the bus bar room is provided.
The terminal 11 of the load cable 8 is connected to the disconnection section 6 via the current transformer 9 on the conductor chamber 4 side. The load cable 8 requires an insulating member surrounding portion 12 to insulate the terminal 11 from the outer cover of the load cable and the ground layer. FIG.
In the above, since the load cable is drawn in from the lower side, the current transformer 9 corresponding to the lower circuit breaker room is attached to the partition surrounding the busbar 10, and the conductor is temporarily pulled up from the disconnecting portion 6, and the terminal of the load cable is connected. The height of the position where the portion 11 is connected from the floor surface is equal to or more than a size obtained by adding the terminal size and the load cable support size to the necessary minimum size of the insulating member surrounding portion 12 (hereinafter referred to as a cable terminal processing size). Specifically, it is preferable that the standard value be 0.8 m or more. On the other hand, the height from the floor of the terminal portion 11 of the load cable corresponding to the upper circuit breaker room needs to be the same as that of the load cable terminal 11 corresponding to the lower circuit breaker room. The dimensions are ensured by arranging the terminals 11 from the part 6 via the current transformer 9 at positions substantially connected in the horizontal direction.

FIG. 2 shows a conventional switchboard. In the case of the conventional method, when the load cable is pulled in from the bottom and when pulled in from the top, the same dimensions are used. Is needed. The difference between FIG. 1 and FIG. 2 is that the size of the upper circuit breaker chamber is smaller than that of the prior art, thereby making it possible to reduce the height of the switchboard. However, in the configuration of FIG. 1, when the load cable is pulled upward,
It becomes difficult to secure the cable terminal processing dimensions described above. Therefore, when the load cable is pulled in from the upper side, the switchboard has the configuration shown in FIG.

When the load cable is pulled in from the upper side, in this system in which the height of the switchboard is reduced, the terminal 1 is connected to the load cable 8 corresponding to the upper circuit breaker room 3a.
It is difficult to make the gap size between 1 and the ceiling larger than the cable terminal processing size. Therefore, a cable processing room 14 is added on the switchboard 1 to secure the cable terminal processing dimensions. With such a configuration, the switchboard body can be reduced in size regardless of the direction in which the load cable is drawn in.

FIG. 4 is an alternative to FIG. In FIG. 3, a cable processing room 14 was added above the switchboard 1 to secure cable terminal processing dimensions.
The height dimensions of the upper conductor chamber 4a and the lower conductor chamber 4b are inverted from those in FIG. 2, so that the upper conductor chamber 4a is larger than the lower conductor chamber 4b. With such a configuration, the current transformer 9 corresponding to the upper circuit breaker room is mounted on the partition wall surrounding the busbar 10, the conductor is once pulled down from the disconnecting section 6, and the terminal section 11 of the load cable is connected. The gap between the cable and the ceiling is equal to or larger than the cable terminal processing dimension. According to this method, FIG.
It is not necessary to add the cable processing chamber 14 shown in FIG. However, it is necessary to change the size of the conductor chamber according to the drawing direction of the load cable. From the standpoint of standardization, it is preferable to add the cable processing chamber 14 shown in FIG.

[0012]

As described above, according to the present invention, the height of the switchboard can be reduced to 1.8 to 2.0 m, so that the switchboard can be manufactured in the switchboard or installed in the place of use. When climbing to the ceiling to perform work, the fall prevention measures are legally unnecessary, and workability is improved. In addition, it is not necessary to work on the table at the time of mounting equipment and wiring work on the ceiling part, thereby reducing danger and improving workability. Further, due to the small size and light weight, there are effects such as a reduction in material costs, a reduction in transportation costs, an improvement in assembling workability, and a reduction in restrictions on a loading port at the time of local loading.

[Brief description of the drawings]

FIG. 1 is a configuration diagram when a load cable is drawn into a high-voltage two-stage switchboard to which the present invention is applied from below.

FIG. 2 is a schematic diagram of a conventional switchboard.

FIG. 3 is a configuration diagram in a case where a load cable is drawn into a high-voltage two-stage switchboard to which the present invention is applied from the upper side.

FIG. 4 is a configuration diagram in a case where a load cable is drawn into a high-voltage two-stage distribution switchboard to which the present invention is applied from the upper side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... switchboard, 2 ... partition board, 3, 3a ... breaker room, 4 ...
Conductor chamber, 4a: Upper conductor chamber, 4b: Lower conductor chamber, 5: Intermediate plate, 6: Disconnect part, 7: Circuit breaker, 8: Load cable, 9
... current transformer, 10 ... busbar, 11 ... terminal of load cable 8
12 ... insulation member surrounding part, 13 ... busbar room inspection cover, 14
... Cable processing room.

Claims (5)

[Claims] 1. A circuit breaker room and a conductor room are formed in a distribution box through a partition plate provided in a switchboard, and the circuit breaker room is placed on an upper side through an intermediate plate provided on the circuit breaker room side of the partition plate. Divided into a circuit breaker room and a lower circuit breaker room, a disconnection part was provided in the partition plate of each circuit breaker room, and the load cable was pulled down on the distribution board where the load cable was connected to one side of the conductor room side, A switchboard, wherein the upper circuit breaker chamber is smaller than the lower circuit breaker chamber by the terminal insulating member surrounding dimension of the load cable terminal corresponding to the upper circuit breaker chamber. 2. The switchboard according to claim 1, wherein the load cable is drawn upward, and the upper circuit breaker chamber is separated from the lower circuit breaker chamber by the terminal insulating member surrounding dimension of the load cable terminal corresponding to the upper circuit breaker chamber. A switchboard having a small size and a cable processing chamber corresponding to the size of the insulating member is provided above the switchboard. 3. The switchboard according to claim 1, wherein the load cable is drawn upward, and the upper circuit breaker chamber is smaller than the lower circuit breaker chamber by the dimension of the insulating member surrounding the load cable terminal corresponding to the upper circuit breaker chamber. A switchboard, wherein the size of the upper conductor chamber and the size of the lower conductor chamber are opposite to the size of the corresponding circuit breaker chamber. 4. A switchboard according to claim 1, wherein a busbar conductor inspection cover is provided on a partition plate of the lower circuit breaker room. 5. The switchboard according to claim 1, wherein the height of the switchboard is 1.8 m to 2.0 m, including the upper circuit breaker room, the lower circuit breaker room, and the installation base.
A switchboard characterized by the following.