JPH0161004B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to the structure of a closed switchboard.

Closed switchboards generally have busbar rooms, load cable rooms,
It consists of a circuit breaker room and a control room, but it is desirable that it be as small as possible and each room can be easily maintained and inspected.

[Prior art and its problems]

As shown in Fig. 1, in a conventional closed switchboard, a circuit breaker chamber 3 is provided in front of a busbar chamber 1 and a load cable chamber 2 arranged above and below, and a control chamber 4 is installed above the circuit breaker chamber 3.
was set up. A busbar connection end 51 connected to the busbar 5 of the busbar room and a load cable connection end 61 connected to the load cable 6 of the load cable room are attached to the partition wall at the back of the circuit breaker room, and the drawer type circuit breaker 7 is installed. are drawn into the circuit breaker chamber 3 and these connecting ends 5
1,61. A door 31 is installed in the front of the circuit breaker room 3 and the control room 4, respectively.
41 is provided, but it is common to provide a rear door 8 on the back of the panel for maintenance and inspection of the busbar room and load cable room. With this structure, the depth of the panel is deep, and it is necessary to provide inspection space on the front and rear sides of the panel, so it is not possible to place the back side closely against the wall of the building or to install two panels back to back. However, the drawbacks were that the installation space for the panels was large and the building was expensive.

[Purpose of the invention]

The object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a front-maintainable closed power distribution board that has a narrow panel depth, allows easy inspection of each room from the front, and allows installation close to a wall or back-to-back. shall be.

[Key points of the invention]

In order to achieve the above object, the present invention narrows the depth by arranging and attaching the busbars to the side wall penetrating bushings vertically, arranging the busbar chamber and the load cable chamber one above the other, and installing these from the front at the boundary between the two chambers. A circuit breaker room is provided by cutting into both chambers, and a control room is removably mounted above the circuit breaker room in contact with the front of the busbar room to reduce the depth of the panel, and the control room, circuit breaker room, and load cable room are The idea is to install a door in the front of the room so that each room can be inspected from the front.

[Embodiments of the invention]

Next, embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a side cross-sectional view of a closed switchboard according to an embodiment of the invention. Components designated by the same reference numerals as in FIG. 1 are the same members. A busbar chamber 1 for storing three-phase busbars 5 arranged vertically and supported by through bushings 9 provided on the side wall of the panel is disposed in contact with the load cable chamber 2 for storing the load cables 6, and these busbar chambers A circuit breaker chamber 3 is provided at the boundary between the load cable chamber 1 and the load cable chamber 2 so as to be inserted into both from the front. The control room 4 is located above the circuit breaker room 3, and the busbar room 1 is located above the circuit breaker room 3.
It is attached so that it can be attached and detached in contact with the front surface of the busbar chamber 1, and when the control chamber 4 is removed, the front surface of the busbar chamber 1 can be opened. The front surfaces of the load cable room 2, circuit breaker room 3, and control room 4 are arranged on almost the same plane, and there are doors 21, 31, and 4 on the front of each room, respectively.
1 is installed. A busbar connection end 51 connected to the busbar 5 and a load cable connection end 61 connected to the load cable 6 via a current transformer 10 are attached to the partition wall at the back of the circuit breaker room 3. are drawn into the circuit breaker chamber 3, and these connecting ends 5
1,61. With such a structure, the depth of the busbar room is narrowed, and at the same time, the depth of the switchboard itself is also narrowed. In addition, to inspect the load cable room 2, circuit breaker room 3, and control room 4, it is only necessary to open the doors 21, 31, and 41 of each room, and the busbar room 1 can also be easily inspected from the front by removing the control room 4. You will be able to do this. Therefore, the back of the panel can be installed with the back surface of the building in contact with the wall of the building, and two panels can also be installed back to back as shown in FIG. 3.

〔Effect of the invention〕

According to the present invention, the depth of the closed switchboard is narrowed,
Since each room can be inspected from the front, the panel can be made smaller and can be installed close to a wall or back-to-back.The installation area is reduced, which has the effect of reducing the size of the building and improving maintainability.

[Brief explanation of drawings]

Figure 1 is a side sectional view of a conventional closed switchboard;
FIG. 3 is a side cross-sectional view of a closed power distribution board according to an embodiment of the present invention, and FIG. 3 is a side cross-sectional view of a back-to-back installed power distribution board according to an embodiment of the present invention. 1: bus room, 2: load cable room, 3: circuit breaker room, 4: control room, 5: bus bar, 6: load cable,
7: Drawer type circuit breaker, 8: Rear door, 9: Through bushing, 10: Current transformer.

Claims (1)

[Claims] 1. The busbar room housing the three-phase busbars arranged vertically is placed above the load cable room with their backs aligned, and the circuit breaker room is installed at the boundary between these two rooms so that it cuts into both rooms from the front. A control room separated from the busbar room by a removable partition wall is provided above the circuit breaker room, and the front surfaces of the control room, circuit breaker room, and load cable room are aligned almost on the same plane, and these A front-maintainable closed switchboard characterized by having an opening/closing door at the front of the room.