JPH0442710A - Multi-stage cubicle - Google Patents

Abstract

PURPOSE:To obtain a multi-stage cubicle, which can be assembled easily on a reduced installation floor area, by arranging vertical buses on the right and left sides of a draw-out unit and disposing a main circuit disconnecting section, which is made and broken through vertical movement of a main circuit machine, above the draw-out unit. CONSTITUTION:Lead terminals 22A, 22B of a draw-out unit 13 are arranged on the right and left sides faces so that vertical buses 25A, connecting between the draw-out units 13, do not interfere with load side lead terminal section 22B. Consequently, insulation distance is not required when a cable 7 is con nected thus realizing dimensional reduction in the depth of a box body. Further more, since a conductor connecting a load side lead terminal 22B and the cable 7 and a conductor connecting the lead terminal 22B and the cable 7 can be simply extended approximately laterally from the lead terminal 22B without requiring three-dimensional bending, a simple and easy-to-assemble cubicle can be obtained. Furthermore, since a side face current transformer 30 does not project into a cable chamber 23B, cable joint work is also facilitated.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a front maintenance type multi-tiered closed switchboard.

(Conventional techniques) Conventionally, in order to reduce the installation area of closed switchboards, multi-level closed switchboards have been adopted in which the interior is partitioned into upper and lower sections to accommodate circuit breakers. The average floor space is also becoming smaller. On the other hand, there is an increasing demand for front-maintenance type devices that allow easy maintenance and inspection of the interior from just the front side, even if the back side is installed in contact with a wall inside a building.

Figure 14 shows a front maintenance type multi-tiered closed switchboard using a conventional horizontal draw-out type circuit breaker, and Figure 15 shows its EE-E cross section.
In the figure, the circuit breaker main body 2 is mounted on a drawer unit 3 which is provided with a main circuit disconnection section 1 at the rear, and at the rear of the drawer unit 3, an output terminal 4A for connection with a panel side conductor,
4B, of which the power supply side output terminal 4A is connected to the common bus bar 5.

The load side outlet terminal 4B is connected to the load cable 7 by an electric wire 8 via a current transformer 6 arranged on the right side of the drawer unit 3. Further, a vertical bus bar 9 that connects the common bus bar 5 and the power supply side outlet terminal 4A of each drawer unit 3 is arranged vertically at the rear of the drawer unit 3.

Further, as shown in FIG. 16, the drawer unit 3 and the auxiliary equipment unit 10 equipped with a voltage transformer etc. are housed in the same panel, and a current transformer 6 is placed between the drawer unit 3 and the common bus 5.
In some cases, the connecting conductor 11 was configured three-dimensionally as will be described later.

(Problem to be Solved by the Invention) However, in the multi-tier closed switchboard configured as described above, the required insulation distance shown in FIG. Since Q had to be ensured, the depth dimension could not be reduced. In addition, the load side outlet terminal 4 of the bow unit 3
The load side electric wire 8 and connecting conductor 11 for connecting the load cable 7 and the current transformer 6 are twisted three-dimensionally to avoid interference between different phases in order to maintain the required insulation between different phases. Since it is necessary to connect by bending the connection conductor 1
The shape of No. 1 was complicated, the number of parts increased, and assembly workability became poor. Furthermore, when connecting each load side cable 7,
It was difficult to do this because the current transformer 6 was in the way. Moreover, when inspecting the vertical busbar 9, it was necessary to carry out storage equipment such as the circuit breaker 2 out of the box each time.

Furthermore, since the vertical busbar 9 on the power supply side and the output terminal 4B on the load side are arranged in front and behind each other, even when inspecting the load cable 7 side, it is possible to safely inspect the load cable 7 side by preventing electric shock due to the ingress of surge voltage. had to disconnect bus 5 from the power supply.

In order to use the "metal clad type" specified in Section JE M14253.105.1, in the conventional configuration, the method of inserting a metal partition plate for the adjacent power supply side and load side output terminals 4A and 4B was extremely complicated. Therefore, it was necessary to increase the external dimensions of the box as well as the depth of the board.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a multi-tiered closed switchboard that requires less floor space and can be easily assembled.

[Structure of the invention]

(Means and Effects for Solving the Problems) One of the present inventions is that a drawer unit in which main circuit equipment is mounted so as to be freely drawn out is stored in multiple stages vertically, and a cable room is provided on the left and right sides of the drawer unit, In a front maintenance type multi-tiered closed switchboard equipped with a vertical bus bar connected to the main circuit equipment, the vertical bus bar is provided on the left and right sides of the drawer unit, and the vertical bus bar is connected to and separated from the upper part of the drawer unit by vertical movement of the main circuit equipment. This is a multi-tiered closed power distribution board that is easy to assemble and has a reduced installation area by providing a main circuit disconnection section. Another aspect of the present invention is that a drawer unit on which main circuit equipment is mounted so that it can be freely pulled out can be moved up and down. A group of drawer units configured in multiple stages is stored, and a cable room is provided on the left and right sides of this group of drawer units.
In a front maintenance type multi-tiered closed switchboard equipped with a vertical busbar that connects the main circuit equipment of the drawer unit group, a vertical busbar is provided between a pair of drawer unit groups arranged on the left and right, and a vertical busbar is provided between the pair of drawer unit groups arranged on the left and right. By providing a cable room on the left and right outside of the drawer unit, and a pair of main circuit disconnecting sections at the top of the drawer unit that connect and disconnect when the main circuit equipment moves up and down, this multi-tier closed switchboard is easy to assemble and requires less floor space. In addition, another aspect of the present invention is that a drawer unit on which the main circuit equipment can be freely drawn out is stored in multiple stages above and below, and a cable room is provided on the left and right sides of this drawer unit, and the cable room is connected to the main circuit equipment. In a front maintenance type multi-tiered closed switchboard equipped with a vertical bus bar connected to the vertical bus bar and a horizontal bus bar to which one end of the vertical bus bar is connected, between the horizontal bus bar and one end of the pull-out unit and the cable room,
A multi-tier closed power distribution board that is easy to assemble and requires less floor space by providing partition plates on the left and right sides of the drawer unit and a main circuit disconnection section on the top of the drawer unit that connects and disconnects when the main circuit equipment moves up and down. It is.

(Example) Below, this section 1. An embodiment of the multi-tier closed switchboard of the second and third inventions will be described with reference to the drawings.

However, parts that overlap with FIGS. 14 to 16 are omitted.

FIG. 1 is a front view of a multi-stage closed switchboard according to the first invention, and FIG. 2 is a side view taken along the line AA in FIG. 1.

In FIGS. 1 and 2, inside the closed box, which has a door (not shown) for inspection on the front side, is a busbar chamber 21 bent in an L shape from the upper end to the left, and a circuit breaker chamber 20 on the lower right side of the busbar chamber 21. It is further divided into cable rooms 23B on the right side, of which bus room 2
At the upper end of the board 1, a common bus bar 5 in which conductors of each phase are arranged in the depth direction is disposed in the left-right direction when viewed from the front, in order to connect with adjacent boards.

On the other hand, the circuit breaker 12 in the circuit breaker chamber 20 is connected to the drawer unit 1
The movable main circuit disconnecting terminals 11 on the upper part of the circuit breaker 12 protrude upward and are arranged in one row each on the left and right, and as 1st to 3rd phases in the depth direction. The fixed-side main circuit disconnection terminal 14 is a disconnection terminal 14 that is disconnected by inserting and rotating a handle (not shown) into a handle insertion hole in the center of the front of a lift operation device 15 (details omitted) provided in the drawer unit 13 below the circuit breaker 12. By moving the circuit breaker 12 up and down via a base (not shown) provided at the lower end of the circuit breaker 12, connection and disconnection are performed in the vertical direction. In FIG. 1, when the circuit breaker 2 is raised, it is in the connected position, and when it is lowered, it is in the disconnected position.

Further, the drawer unit 13 is provided with lead terminals 22A and 22B on the left and right sides when viewed from the operation side of the circuit breaker 12 for connection to the board-side conductor. In FIG. 1, the left outlet terminal 22A is on the power supply side, and the right outlet terminal 22B is on the load side. These output terminals 22A, 22
The respective phases of B are arranged as the first to third phases in the depth direction similarly to the common bus bar 5. In addition, these output terminals 22A, 22
B may be configured integrally with the fixed side main circuit disconnection section terminal 14.

Furthermore, a through-type current transformer 30 is connected to the load side outlet terminal 22B.
is installed. Note that, depending on the protection method, a feedthrough current transformer 30 may be attached to the power supply side output terminal 22A. The power supply side output terminal 22A is connected to the same phase of the common bus 5 by a substantially straight vertical bus 25A.

On the other hand, the load side output terminal 22B is connected to the cable room 2 on the right side.
The cable connection terminal 3B is configured to extend almost linearly to the cable connection terminal 32.

In the multi-stage closed switchboard of the first invention configured in this manner, the lead terminals 22A, 22 of the drawer unit 13 are
B are arranged on both the left and right sides, and each drawer unit 13
Vertical bus bar 25A connecting between and load side lead terminal part 2
2B, no insulation distance is required when connecting to the cable 7, and the depth of the box can be reduced. In addition, the output terminal 22B on the load side and the cable 7
The conductor that connects only needs to be extended almost horizontally from the lead terminal 22B, and it does not need to be bent three-dimensionally as in the conventional case.
A multi-tiered closed switchboard whose configuration is easy to understand, simple, and easy to assemble can be obtained. Also, the current transformer 30 on the side is connected to the cable room 2.
Since it does not protrude from 3B, cable connection work is also facilitated.

In the above embodiment, the power supply side is on the left and the load side is on the right, but the configuration may be reversed, and the Yuide unit 13
The number of storage units may be 4 or 5.

Further, the current transformer 30 may be cast integrally with the lead terminal 22B.

3 to 5 are front views showing other embodiments of the multi-tiered closed switchboard of the first invention, respectively. Of these, Figure 3 shows a Yude unit 13 in the middle of the unit panel, and main circuit auxiliary equipment 3 such as an instrument transformer and a lightning arrester above and below it.
It houses auxiliary equipment units 36 and 38 equipped with 5. In this way, in the case of the auxiliary equipment units 36 and 38, the output terminals 22A and 22B only need to be provided on the power supply side. Note that the power source side lead terminals 22A and 22B are structured so that they can be selectively attached to either the right or left side.

For example, the topmost auxiliary equipment unit 36 has an output terminal 2.
2B is provided on the right side, and the lowest auxiliary equipment unit 38 has an output terminal 22A on the left side. These auxiliary equipment units 36, 38, drawer unit 13, and common bus bar 5 are connected by vertical bus bars 25A and 25B to form a main circuit.

Furthermore, when storing only the auxiliary equipment 35 in the unit board, as shown in FIG. Connect with. In the example shown in FIG. 4, the connecting conductor 45 is provided inside the auxiliary equipment unit 42 in the middle stage, but it can be similarly configured in any stage. As a result, connections between other equipment units or with the bus bar can be made on either the left or right side, and the side with the connection space and the side with better workability can be selected.

FIG. 5 shows a case where only the auxiliary equipment unit is of a horizontal drawer type. Since the auxiliary equipment 50 must be connected during operation, it is rarely placed in the disconnected position. The auxiliary equipment 50.51 is provided with main circuit disconnection terminals 54.55 on the back side. However, the auxiliary equipment unit 52
．． The positions of the output terminals 56 and 57 of 53 are arranged to be the same as those of the drawer unit 13. Then, the output terminal 56.57 and the main circuit disconnection terminal 54.55 are connected inside the auxiliary equipment unit 52.53. As a result, the bus bar and conductor on the panel side remain unchanged, and the lifting device 15 can be omitted.

FIG. 6 is an equipment layout diagram of the multi-stage closed switchboard of Mizui 2's invention viewed from the front with the front door opened, and FIG. 7 is a sectional view taken along line BB in FIG. 6.

In FIGS. 6 and 7, a horizontal busbar 55 in which conductors of each phase are arranged in the depth direction for connection with adjacent panels is disposed in the busbar chamber 51 at the upper end in the left-right direction when viewed from the front. Circuit breaker 1 with movable side main circuit disconnection terminal 11 arranged in the upper direction
2 are stored in drawer units 13.53 provided on the left, right, top and bottom. The fixed side main circuit disconnection terminal 14 of this drawer unit 13.53 is connected to the lifting operation device 1 which is the same as the first invention.
5, the circuit breaker body is vertically connected to and disconnected from the movable main circuit disconnection terminal 11 of the circuit breaker body.

Output terminals 22A, 22B are provided on the side surface of the drawer unit 53 for connection with a conductor, and outlet terminals 22A, 22B are also provided on the side surface of the drawer unit 13 so that the right and left sides are opposite to the drawer unit 53. . These drawer units 53 and drawer units 13 are stacked in multiple stages. This stacked drawer unit group 24A.

A vertical generatrix 25 is provided between the panels 24B with a predetermined ground clearance, and the drawer unit groups 24A and 24B are fixed on a base 26 located at the center of the lower end with respect to the width direction of the board.

This base 26 is a drawer unit group 24A.

Although it may be provided separately for 24B, it is commonly used in consideration of the reduction in the number of parts, the ease of leveling, and the fact that all equipment units can be placed on the base 26 and transported from the ceiling of the panel. It is better to do so. In addition, cable compartments 23A and 2 are provided outside the two rows of drawer unit groups 24A and 24B.
Place 3B. The right side outlet terminal 22A of the left column drawer unit group 24A and the left side outlet terminal 22A of the right column device unit group 24B are connected to the same phase of the common bus bar 55 by a substantially straight vertical bus bar 25.

On the other hand, the left outlet terminal 2 of the drawer unit group 24A in the left row
2B is the cable connection terminal 3 of the cable room 23A on the left
2, the right outlet terminal 22B of the drawer unit group 24B in the right row is connected to the cable connection terminal 3 of the cable room 23 on the right side.
2, the configuration is extended almost linearly as it is.

In the multi-tiered closed switchboard of the second invention configured in this way, the drawer units 13 with the lead terminals 22A, 22B arranged on the sides are stacked in multiple tiers, and these are arranged in two rows. 1 vertical bus bar common to equipment unit group
Since only one location is required, the number of parts is reduced, assembly is easy, and a multi-tiered closed switchboard with good utilization of the installation area can be obtained. Further, the common vertical bus bar 25A can be inspected from the front without removing the circuit breaker 12.

FIG. 8 shows another embodiment of the multi-tiered closed switchboard according to the second invention. In the same figure, there is a drawer unit 1 in the unit panel.
3.53 and auxiliary equipment units 41 and 42 equipped with main circuit auxiliary equipment 40 such as a voltage transformer and a lightning arrester. In the case of the auxiliary equipment units 41 and 42, the output terminal 22A only needs to be provided on one side, so the structure is such that the fixed side main circuit disconnection section terminal 14 and the output terminal 22B can be selectively attached to either the left or right side. Output terminal 2 of the auxiliary equipment unit 41 of the left equipment unit group 45
2A is provided only on the right side, and the output terminal 22A of the auxiliary equipment unit 42 of the equipment unit group 46 on the right side is provided only on the left side. These equipment units are connected to a common vertical bus 25.
A is connected to the horizontal bus bar 55 to form a main circuit.

FIG. 9 is a front view of a multi-stage closed switchboard according to the third invention, FIG. 10 is a sectional view taken along the line CC in FIG. 10, and FIG.
It is a DD sectional view of the figure.

In FIGS. 9 to 11, both sides and the ceiling side of the drawer unit 13 are closed with metal plates 16A, 16B, and 186.However, at the top of the sides, there is an output terminal 22A for connection with the panel side conductor, 22B is provided via an insulating bushing 19 attached to the metal plates 16A and 16B. Although this insulating bushing 19 is of a three-phase integral type, it may be of a single-phase type. A plurality of these drawer units 13 are stacked on a base 31.

The uppermost drawer unit 1 is located at the upper end of the cable room 23B.
A metal plate 29 is installed horizontally at a position approximately at the same height as the ceiling surface of 3. On the other hand, the left outlet terminal 22A is connected to the vertical bus bar 2.
4 to connect with the horizontal busbar 5. The horizontal busbar 5 is supported by an insulator 25 attached to a metal plate 18 that closes the ceiling of the drawer unit 13. Output terminal 22A and vertical bus bar 2
4 is made by providing a working hole 26 in a part of the metal plate 16A of the drawer unit 13, as shown in FIG. Note that this part is closed from the inside with another closing plate 27 after the work is completed.

As a result, the cable room 22B on the right side of the drawer unit 13
is a cable compartment for metal clad switchgear according to JEM1425.3, 102.1.

Further, the right output terminal 22B is the first. Similar to the second invention, the cable is extended almost linearly to the cable connection terminal 32.

With the above configuration, the busbar chamber 21 surrounded by the metal plate 16A on the left side of the drawer unit 13, the ceiling metal plate 18, and the horizontal metal plate 29 is constructed according to JE M1425.3.102.1.
It becomes a busbar compartment and is completely separated from the cable compartment on the right side.

In the multi-tier closed switchboard configured in this way, the interface between the drawer unit 13, the busbar room, and the cable room is defined by the metal plate 16.
A and 16B are used as partitions, bushings 19 are installed in the lead-out terminal penetrations on the sides, and horizontal busbars 5 and load cables 7 are separated from each other by horizontal metal plates 29 on the ceiling of the drawer unit. It is possible to create a highly safe multi-tiered closed switchboard of the "metal clad type" according to JEM 1425.3.102.1 in which each compartment is separated.

Further, since the support for the horizontal bus bar 5 can be attached using the metal plate 18 on the ceiling of the equipment unit, the number of parts can be reduced. Note that if an insulating plate is used instead of a metal plate, it can also be a "compartment type" multi-tiered closed switchboard as specified in JEM1425.3.102.2. Further, the fixed side main circuit disconnecting portion terminal and the lead terminal may be integrally configured.

Furthermore, the insulating bushing 19 is not limited to a cylindrical shape, but may be a plate shape. Furthermore, in the case of main circuit auxiliary equipment such as instrument transformers and lightning arresters, the lead terminal may be provided only on the power supply side, and a separate blocking plate may be attached to the bushing penetration on the other side.

FIGS. 12 and 13 show other embodiments of the multi-tiered closed switchboard according to the third invention.

Of these, in FIG. 12, a horizontal metal partition plate 41 is provided inside the drawer unit 13, a bushing 19 is attached to this, a vertical metal partition plate 43 is inserted between the bushings 19, and the power supply side and load side It is separated into a "metal clad" structure. Further, in FIG. 13, an L-shaped bushing 44 is used and the bushings 44 are arranged on opposite sides to form a "metal clad type" structure.

〔Effect of the invention〕

As described above, according to the first invention, the drawer unit on which the main circuit equipment is mounted so as to be freely extended is stored in multiple stages above and below, and the cable room is provided on the left and right sides of the drawer unit, and the cable room is connected to the main circuit equipment. In a front maintenance type multi-level closed switchboard equipped with vertical busbars, the vertical busbars are installed on the left and right sides of the drawer unit, and a main circuit disconnection section is installed at the top of the drawer unit that connects and disconnects when the main circuit equipment moves up and down. Therefore, according to the second invention, a drawer unit group is housed in which the drawer units on which the main circuit equipment can be freely drawn out are arranged in multiple stages vertically, and a cable room is provided on the left and right sides of the drawer unit group. , in a front maintenance type multi-tiered closed switchboard equipped with a vertical bus bar connecting the main circuit equipment of the drawer unit group, a vertical bus bar is provided between a pair of drawer unit groups arranged on the left and right, and a pair of drawer unit Furthermore, according to the third invention, since cable rooms are provided on the left and right outside of the group, and a main circuit disconnection section is provided at the top of the drawer unit that connects and disconnects when the main circuit device moves up and down, the main circuit device can be freely drawn out. The drawer units mounted on the unit are stored in multiple stages above and below, and a cable room is provided on the left and right sides of the drawer unit.A vertical bus bar is connected to the main circuit equipment, and a horizontal bus bar is connected to one end of the vertical bus bar. In the front maintenance type multi-tiered closed switchboard, partition plates are provided between the horizontal bus bar and one end of the pull-out unit and cable room, and on the left and right sides of the pull-out unit.
Since the main circuit disconnection section is provided in the upper part of the drawer unit to be connected and separated by the vertical movement of the main circuit equipment, it is possible to obtain a multi-tiered closed switchboard that is easy to assemble and can reduce the installation floor space.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a multi-stage closed switchboard according to the first invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG.
4 and 5 are front views showing other embodiments of the multi-stage closed switchboard according to the first invention, and FIG. 6 is a front view showing an embodiment of the multi-stage closed switchboard according to the second invention. Figure 7 is B- in Figure 6.
B sectional view, FIG. 8 is a front view showing another embodiment of the multi-stage closed switchboard of the second invention, and FIG. 9 is a front view showing one embodiment of the multi-stage closed switchboard of the third invention. Figure 10 is a sectional view taken along line C-C in Figure 9, Figure 11 is a sectional view taken along line DD in Figure 9, and Figure 1
2 and 13 are partial side views showing other embodiments of the multi-tier closed switchboard of the third invention, FIG. 14 is a front view of a conventional multi-tier closed switchboard, and FIG. 15 is the E of FIG. 14. -E sectional view,
FIG. 16 is a front view of a conventional multi-tier closed switchboard different from FIG. 14. 5... Common bus bar 12... Breaker 13... Drawer unit 15... Lifting device 20... Breaker room
21...Busbar room 23A, 23B...Cable room 24A, 24B...Drawer unit group 25A, 25B...Vertical busbar agent Patent attorney Yoshiaki Inomata (and one other person) -A No. fyli No. 2 Leather flashing momon potato diagram, Encai diagram, Zo diagram, Enmai diagram, lθ diagram, Seki diagram, Broom diagram, Country diagram

Claims (3)

[Claims] (1) A drawer unit on which main circuit equipment can be freely drawn out is stored in multiple stages above and below, a cable room is provided on the left and right sides of this drawer unit, and a front surface is provided with a vertical bus bar connected to the main circuit equipment. A maintenance type multi-tiered closed switchboard, characterized in that the vertical bus bar is provided on the other left and right sides of the drawer unit, and a main circuit disconnection section that connects and disconnects by vertical movement of the main circuit equipment is provided above the drawer unit. Multi-level closed switchboard. (2) A drawer unit group is housed in which drawer units each having main circuit equipment mounted thereon in a freely drawable manner are arranged vertically in multiple stages, and a cable room is provided on either side of the left or right side of the drawer unit group, and the main circuit of the drawer unit group is In a front maintenance type multi-tiered closed switchboard equipped with a vertical busbar for connecting equipment, the vertical busbar is provided between the pair of drawer unit groups arranged on the left and right, and the vertical busbar is provided between the left and right outer sides of the pair of drawer unit groups. A multi-tiered closed power distribution board, characterized in that the cable room is provided in the drawer unit, and a main circuit disconnection section that connects and disconnects with the vertical movement of the main circuit equipment is provided in the upper part of the drawer unit. (3) A drawer unit on which main circuit equipment can be freely drawn out is stored vertically in multiple stages, and a cable room is provided on the left and right sides of this drawer unit, and a vertical bus bar connected to the main circuit equipment and a In a front maintenance type multi-tiered closed switchboard provided with a horizontal busbar connected at one end, partition plates are provided between the horizontal busbar and one end of the pullout unit and the cable room, and on the left and right side surfaces of the pullout unit, A multi-tiered closed power distribution board, characterized in that a main circuit disconnection section is provided on the upper part of the drawer unit, the main circuit disconnecting section being connected and separated by the vertical movement of the main circuit equipment.