JP3237671B2 - Network switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a switchboard with an improved arrangement of network power receiving and transforming equipment.

[0002]

2. Description of the Related Art In cities, three-dimensional use of land is becoming popular, and buildings are becoming higher. In high-rise buildings, the load distribution of electric power increases in the vertical direction, the load capacity is extremely large, and many publicly important ones are included. Therefore, the reliability and safety of the power supply are strongly demanded. Furthermore, since the facilities are located in densely populated areas of the city, it is desired that the installation area be as small as possible. In places such as buildings or factory facilities where there is a large load at one location, a network power receiving system with high supply reliability can be said to be optimal.

[0003] In the network power receiving system, power is received from a power substation via two to four 22KV or 33KV distribution lines.
On the primary side of the network transformer, only the disconnecting switch for receiving power is installed, on the secondary side, a fuse and a protector breaker are installed for each network transformer, and the load side is connected in parallel with a network bus, and the network This is a method of supplying power to loads in various directions by several distribution lines connected to the bus. Incidentally, as a spot network power receiving system, JP-A-62-60937 can be mentioned.

When a short circuit fault occurs in this network power receiving system, for example, on the primary side or the secondary side of a network transformer, even if the fault circuit is disconnected, power is supplied from a healthy line to prevent a load from being cut off. Power supply is highly reliable, and this is in line with customer needs and demand has recently increased.

In the network power receiving system, the network transformer, the protector and the take-off circuit breaker are housed in separate wiring boards, and the network transformer, the protector and the take-off circuit breaker are connected by a distribution line. Was.

[0006]

For this reason, simply installing these switchboards not only significantly increases the installation area of the network power receiving equipment, but also increases the distribution line and network bus when connecting a plurality of switchboards. And the like, the wiring structure becomes complicated, and the wiring work is not easy.

Further, at the time of maintenance and inspection, the network transformer is separated from the protector circuit breaker and the take-off circuit breaker, so that it is difficult to perform maintenance and inspection. It is considered that usability such as operability is deteriorated. In the switchboard disclosed in Japanese Utility Model Application Laid-Open No. 56-100006, the same problem as described above occurs because the arrangement of the network buses is high.

An object of the present invention is to provide a switchboard with improved operability of a circuit breaker and improved usability.

Another object of the present invention is to provide a switchboard which simplifies the arrangement of buses and electrical equipment and facilitates connection work.

Another object of the present invention is to provide a switchboard in which the installation area of the substation equipment is significantly reduced.

[0011]

A switchboard according to the present invention has a transformer room formed in a switchboard, a conductive room formed above the transformer room, an electric room on the switchboard surface side, and a horizontal arrangement in the transformer room. The transformer, the bus bar arranged in the conductive chamber corresponding to the horizontally arranged transformer, and the circuit breaker arranged in the electric room corresponding to the bus installation unit corresponding to the transformer arranged horizontally. Have prepared.

[0012]

As a result, the transformer room has a transformer whose horizontal direction is horizontal, the height dimension is greatly reduced, and a bus is installed in the conductive room arranged on the transformer room, and the bus bar installation part is corresponded. The circuit breaker can be placed in the electrical room to be installed, the circuit breaker, the electrical room, etc. can be installed within the reach of the worker, and the worker can manually put the circuit breaker in and out of the electrical room, Or you can operate the electric room,
The switchboard of the present invention not only has improved operability and ease of use, but also has a remarkable reduction in the installation area of the power receiving and transforming equipment according to the switchboard of the present invention.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A network switchboard according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a reference transparent diagram shown for easy understanding of the configuration of the network switchboard of the present invention, and there are portions that do not always correspond to FIGS. 2 and 3 are views of the embodiment of the present invention when the network switchboard of FIG. 1 is viewed from the left side, that is, from the front and the back. The conductors in FIG. 3 are shown only in the high-pressure relationship for ease of understanding. 4 and 5 are sectional views taken along lines AA and BB in FIGS.

In the drawing, a network switchboard 1 is formed in a box shape including a first switchboard unit 2 and a second switchboard unit 3 made of a steel plate. Both units 2, 3
Are configured to be separable. In the middle of the network switchboard 1, a partition plate 5 such as a steel plate is used. A transformer room 6 is formed below the partition plate 5.
In the transformer room 6, three doors 4A are attached to the network switchboard 1 so as to be freely opened and closed. A handle 4B is attached to the door 4A. Two partition plates 5A and 5B are provided at a predetermined interval above the partition plate 5, and a conductor chamber 7 and an electric chamber 8 and an opening / closing chamber 9 are formed on the left and right sides of the conductor chamber.

The electric chambers 8 and 10 are separated by a steel plate partition plate 5C to form two independent chambers. On the surface of the electric room 8, one and three doors 8A and 8B are attached to the network switchboard so as to be freely opened and closed. Each electric room 10 forms an independent room according to the three doors 8B. The doors 8A and 8B are provided with a handle 8C, an instrument 8D, and a square opening 8E. A ventilation duct 13 is provided on a roof surface 12 corresponding to the electric room 8 and the opening / closing room 10.

The electric chambers 8, 10 and the opening / closing chamber 9 and the ventilation duct 13 communicate with each other. Back side 2 of transformer room 6
An intake port 14 and an exhaust port 15 are formed in the X and the ventilation duct 13. A plurality of small holes 16 are formed in the partition plate 5. Therefore, the air flows in the intake port 1 as shown by the arrow direction Z.
4 passes through a plurality of small holes 16 and exits from the exhaust port 15 to the outside air. The blower 17 attached to the intake port 14 is rotated by a motor 18.

The three-phase network distribution lines 20A, 20
B and 20C are connected to conductors of the elbow type cable head 21 as shown in FIG. The elbow type cable head 21 is disposed in the switching room, and one end penetrates the ceiling, and the other end is connected to a load switch 22 in the switching room via a bushing. One end of the load switch 22 is connected to a primary terminal 25 of a three-phase network transformer 24 in the transformer room via a bushing 23 provided on the partition plate 5. Note that a disconnecting section may be used instead of the load switch. Further, the above-described network wiring 20 may be connected to the primary terminal 25 of the network transformer 24 from below the network switchboard 1.

The network transformer 24 has a current and voltage of about 22,000 V and 52 A on the primary side, for example, about 41 on the secondary side.
It is converted to a current and voltage of 5V and 2800A. The network transformer 24 of each phase is a so-called horizontal arrangement type network transformer 24 in which the longitudinal direction L of the network transformer is arranged in the horizontal direction. The three-phase coils 24A of the horizontally arranged network transformer 24 are arranged at predetermined intervals in the width direction Y of the network switchboard 1. The three-phase coil 24A is the core 2
The conductor wire is wound around 4B. Further, the longitudinal direction L of the network transformer may be arranged along the width direction Y of the network switchboard 1. The network transformer 24 arranged in the horizontal direction is supported by a support 26, and the support 26 is driven by wheels 27 attached to the support 26 in the directions 1X and 2X indicated by arrows.
And can enter and exit the network switchboard 1.
Arrow direction 1X is the front side, and arrow direction 2X is the back side.

A lead conductor 29 connected to the secondary terminal 28 of the horizontally arranged network transformer 24 connects the fuse 31 and the protector current transformer 32 on the back side 2X of the electric chamber 8,
It again extends to the front side 1X and is connected to the primary side of the protector breaker 33. 29A is a neutral point conductor.

A protector breaker 33 is housed in the electric room 8 with the door 8A opened. The take-off circuit breaker 34 is arranged in the electric room 10 in which three doors 8B on the left side of the door 8A are opened. When both doors 8A and 8B are closed, the gauges 50 provided in the protector breaker 33 and the take-off breaker 34 are inserted into the opening 8E, and both electric chambers are inserted into the opening 8E and operated from outside. it can. The protector circuit breaker 33 and the take-off circuit breaker 34 are connected to the electric chambers 8 and 10 from the outside, respectively.
The primary and secondary terminals 4 are electrically connected to and disconnected from the disconnecting portion 39 provided in the electric chamber 8 shown in FIGS. 9 to 11. The lead conductors 36 and 37 connected to the disconnecting section 39 are connected to the network bus 35.

Multi-phase horizontal network transformer 2
Network bus 35 extending along the arrangement direction of the network 4
Are arranged at predetermined intervals in the longitudinal direction L of the network transformer 24, and the protector circuit breaker 33 and the take-off circuit breaker 34 are connected to the network bus 35. As shown in FIG. 6, the network bus 35 uses a band-shaped conductor 35A, and has a width 1L in the direction perpendicular to the height of the band-shaped conductor.
And the thickness portion T, but on the contrary, as shown in FIG. 7, the thickness portion 1L and the width portion T are arranged so that the thickness portion 1L and the width portion T come in the height direction of the strip-shaped conductor 35A and the direction perpendicular thereto. You may. That is, the plurality of phases of the network bus 35 may be arranged in the vertical direction, that is, on the steps as shown in FIG.

As shown in FIGS. 4 and 5, the protector circuit breaker 33 and the take-off circuit breaker 34
5 are arranged along the extension direction. The plurality of secondary sides of the protector circuit breaker 33 and the take-off circuit breaker 34 and 1
The lead-out conductors 36B and 37A on the next side are arranged along the direction in which the network bus 35 extends. The secondary and primary lead conductors 36B and 37A of the protector circuit breaker 33 and the take-off circuit breaker 34 are connected to the four phases of the network bus 35, as shown in FIGS. By arranging the extraction position of 36B at a position higher than the extraction position of primary-side extraction conductor 37A, instruments 50 of protector breaker 33 and take-off circuit breaker 34 can be arranged on doors 8A and 8B in the same direction. . A plurality of secondary lead-out conductors 37 of the take-off circuit breaker 34
B extends to the upper side opposite to the network transformer 24 and is connected to the load conductor 38 in the ventilation duct 13, and the load conductor 38 extends outside from the front side 1X of the network switchboard 1. Further, the secondary-side lead-out conductor 37B may be arranged along the network bus 35.

Next, the operation and effect of the network switchboard of the present invention will be described.

In this embodiment, the height of the horizontally arranged network transformer 24 is significantly lower than that of the vertical transformer in which the longitudinal direction of the transformer is vertically arranged. The protector circuit breaker 33 and the take-off circuit breaker 34 arranged on one side of the network bus 35 can be installed within the range of the height of the workers, so that the workers can The protector circuit breaker 33 and the take-off circuit breaker 34 can be moved in and out of the electrical rooms 8 and 10 by using the
50 can be operated, the operability of the protector circuit breaker 33, the take-off circuit breaker 34, the electric rooms 8, 10 and the like is improved, and the usability is improved.

The range of heights that the worker can reach depends on the support table 2
The protector circuit breaker 33 and the take-off circuit breaker 34 may be provided within a height range obtained by adding the diameter of the network transformer coil 24A on the horizontally arranged network transformer 24 supported by 6. Below this size range, the network transformer 24 is installed, and the protector breaker 33 and the take-off breaker 34 cannot be arranged. If the height is above the above range, the worker's hand does not reach the electrical devices such as the protector circuit breaker 33 and the take-off circuit breaker 34, and the work is difficult.

This means that the fuse 31 and the protector current transformer 32 are also installed within the range of the height reachable by the worker, so that it is needless to say that the same operation and effect as described above can be achieved. Further, since the fuse 31 and the protector current transformer 32 are arranged collectively on the back side of the network switchboard 1, not only the work at the time of installation and maintenance and inspection is facilitated, but also the appearance of the door side and the front side is improved. Was.

In this embodiment, as a result of pulling out the secondary-side lead-out conductor 37B of the take-off circuit breaker 34 to the rooftop, FIG.
As shown in the figure, the secondary and primary lead-out conductors 36 of the protector breaker 33 and the take-off breaker 34 having different draw-out positions from the network bus 35 correspondingly arranged on the transformer room.
B and 37A can be arranged in a straight line and can be directly connected, which not only simplifies the conductor arrangement, but also distinguishes the primary and secondary lead conductors 37A and 36B from different lead positions. This has made it easier to do so, which has reduced the number of incorrect wiring. In particular, even in the dark network switchboard 1, the position of the protector breaker 33 or the take-off breaker 34 can be immediately identified, so that not only the work of assembling, maintenance and inspection, etc. becomes remarkably easy, but also the number of erroneous wiring is reduced. .

In this embodiment, if the secondary lead-out conductor 37B of the take-off circuit breaker 34 is pulled out to the upper side opposite to the network transformer 24, it is electrically safe without causing insulation problems with the network transformer 24. It is.

As shown in FIGS. 5 and 11, the secondary lead-out conductor 37B of the take-off circuit breaker 34 extends upward, which is opposite to the network transformer 24, and is connected to the load conductor 38 in one ventilation duct. To the secondary side lead-out conductor 37B
In addition, the load conductor 38 does not collide with the network bus 35 and the network transformer 24, and does not cause an insulation problem.
Can be extended from the front side 1X to the outside, so that the network bus 35 can be safely extended in series.

As a result, the series network bus 35
Can connect the network switchboards 1A, 1B, and 1C of three network lines 22KV to the private generator 40 and the power factor capacitor 41 adjacent to the network switchboard, thereby forming a network power receiving and transforming system. In addition, the electric devices such as the private power generator 40, the power factor capacitor 41, and the like can be integrated, so that the installation area of the network power receiving and transforming system can be further remarkably reduced, and the distribution line system can be simplified.

The electric equipment 3 is arranged along the direction in which the multi-phase network transformer 24 and the network bus 35 are arranged.
3 and 34 can be arranged.
Since the 4, 33, 34 and the network bus 35 can be integrated in one place, not only can the installation area of the network power receiving system be greatly reduced, but also the maintenance and inspection of the electric devices 24, 33, 34, etc. in one place. Because you can
Maintenance work has become easier.

Further, the network transformer 24 connected to the network bus 35, the terminals of the electric devices 33 and 34, and the lead conductors are arranged so as to be orthogonal to the network bus 35, and are not electrically crossed with each other. No inflection is caused, and no adverse effect is exerted on the electric devices 33, 34 and the like.

As an embodiment different from the above-described embodiment, a transformer room 6, a conductor room 7, and electric rooms 8 and 10 are formed on the upper and lower sides of the network switchboard 1, and the transformer room 6 and the conductor room 7 are formed. And a network transformer 24, a network bus 35 and a protector circuit breaker 33 in a horizontal arrangement with the electrical room 8
And the take-off circuit breaker 34 are housed. Network bus 35, protector breaker 33 and take-off breaker 3
4 is arranged corresponding to the horizontal arrangement type network transformer 24.

In this case, the primary terminals 36A, 37A of the protector circuit breaker 33 and the take-off circuit breaker 34 are arranged above the secondary terminals 36B, 37B, and the primary terminal 36A of the protector circuit breaker 33 is connected to the secondary terminal 36A. It prevents electrical crossing with the side terminal 37B and prevents the take-off circuit breaker 3
The lead-out conductor on the load side, which is connected to the secondary terminal 37B of No. 4, is drawn out through the floor opposite to the network transformer 24, or drawn out along the floor or the network bus 35. To

In this embodiment, the network switchboard 1 is divided into a first switchboard unit 2 having a protector breaker 33 and a second switchboard unit 3 having a take-off breaker 34. This means that, when a network power receiving and transforming system having an increased capacity is used, the network transformer 24 and the protector breaker 3 having the increased capacity are used.
3 and are used. The network transformer 24 and the protector circuit breaker 33 are larger than the normal network transformer 24 and the protector circuit breaker 33, and have a size capable of accommodating the network transformer 24 and the protector circuit breaker 33 that have increased with an increase in the electric capacity. Since the first switchboard unit 2 changed to the above can be used, if a plurality of standardized first switchboard units 2 and second switchboard units 3 are prepared, a plurality of switchboard units can be combined according to the electric capacity. Since the network switchboard 1 can be assembled, the assembling work efficiency can be significantly improved.

In the motor 18 of this embodiment, when a current equal to or more than a predetermined value flows on the secondary side of the network transformer 24, the current is detected by the current transformer 31 and a switch (not shown) is closed to drive the motor 18. Or when a thermostat is installed in the transformer, and when the temperature in the transformer becomes equal to or higher than a certain temperature, the thermostat operates to drive the motor 18 and rotate the blower 17 so that the external air is blown by an arrow. By flowing in the direction Z, the temperature of each room was lowered, and the network transformer 24, the protector circuit breaker 33, the take-off circuit breaker 34 and the like could be used up to the rated current limit.

Although the above embodiment has been described with reference to a network switchboard, the present invention may be applied to a switchboard using a transformer. That is, it is a switchboard for receiving power from an external power supply, stepping down and supplying power to a plurality of loads, in which a multi-phase transformer is horizontally arranged at the lower part of the switchboard, a bus is arranged at the upper part of the switchboard, and corresponds to the bus at the upper part of the switchboard. A circuit breaker is installed in the electric room on the front side of the switchboard to achieve the same effect as described above. When a plurality of circuit breakers having different performances are arranged in the electric room, the breaker having the different performance is the same in the electric room by changing the positions of the primary and secondary extraction terminals of each circuit breaker and connecting them to the bus. It can be arranged in any direction, and the usability of circuit breakers, electrical rooms, etc. has improved.

In the switchboards shown in FIGS. 13 to 15, the network transformer 24 is vertically arranged, and a network bus 35 is formed along the longitudinal direction L of the network transformer 24 and along the direction in which the network transformer 24 is arranged. By disposing the protector circuit breaker 33 and the take-off circuit breaker 34 to the network bus 35, the protector circuit breaker 33 is disposed so as to be orthogonal to the longitudinal direction L of the network transformer 24 and has a reduced height. The circuit breaker 33 and the take-off circuit breaker 34 can be connected, and the operator can manually operate the protector circuit breaker 33, the take-off circuit breaker 34, and the like. Further, the fuse 31 and the protector current transformer 32 connected to the lead-out conductor 36A on the secondary side of the network transformer 24 can be mounted from the front of the switchboard, facilitating the mounting work.

On the other hand, the four-phase network buses 35 are arranged in an inclined manner, and the gaps between the network transformer 24 and the protector breakers 33 and the take-off breakers 34 are narrowed to reduce the size of the switchboard. Furthermore, the switchboard is arranged in an inclined manner so that the network transformer protrudes to the back side of the switchboard,
The height of the network transformer can be reduced, and the size of the switchboard can be reduced.

[0041]

As described above, according to the present invention, as a result of lowering the height by disposing the transformer horizontally at the lower part of the switchboard, the positions of the busbar disposed at the upper part of the switchboard and the breakers in the electric room are reduced. The height has been reduced, and circuit breakers and the like can be installed within a height that can be reached by workers. Therefore, the operator can manually operate the circuit breaker and the instruments in the electric room, and the operation of the circuit breaker and the like is improved, so that the usability of the switchboard is improved. In addition, the lead-out direction of the load-side lead conductor of the breaker can be pulled out in the opposite direction to the transformer, and the lead-out conductor bus of the breaker can be arranged in a straight line, so that the conductor arrangement can be simplified. Was.

[Brief description of the drawings]

FIG. 1 is a reference transparent diagram when seen through a network switchboard shown as a reference diagram of the present invention.

FIG. 2 is a front view of the network switchboard of FIG. 1, which is an embodiment of the present invention, when viewed from the left (front) side.

FIG. 3 is a rear view of the network switchboard of FIG. 1, which is an embodiment of the present invention, when viewed from the rear side.

FIG. 4 is a sectional view of the network switchboard of FIG. 2, which is an embodiment of the present invention, taken along the line AA.

FIG. 5 is a sectional view taken along the line BB of the network switchboard of FIG. 2, which is an embodiment of the present invention.

FIG. 6 is a side sectional view of a band-shaped conductor used in the network bus of FIGS. 4 and 5, which is an embodiment of the present invention.

FIG. 7 is a side sectional view of a band-shaped conductor used for a network bus according to another embodiment of the present invention.

FIG. 8 is a schematic circuit diagram used for the network switchboard of FIG. 1 which is an embodiment of the present invention.

FIG. 9 is a schematic explanatory view showing wiring between a network transformer and a protector circuit breaker of FIG. 1 which is an embodiment of the present invention.

FIG. 10 is a connection diagram of a protector circuit breaker used in the network switchboard of FIG. 1, which is an embodiment of the present invention.

11 is a connection diagram of a take-off circuit breaker used in the network switchboard of FIG. 1 which is an embodiment of the present invention.

FIG. 12 is a schematic circuit diagram of a network power receiving and transforming system according to another embodiment of the present invention.

FIG. 13 is a front view showing an arrangement of a network transformer, a protector, and a take-off circuit breaker according to another embodiment of the present invention.

FIG. 14 is a layout diagram of a network transformer and a protector circuit breaker used in the embodiment of FIG. 13 of the present invention.

FIG. 15 is a layout diagram of a network transformer and a take-off circuit breaker used in the embodiment of FIG. 13 of the present invention.

[Explanation of symbols]

1: Network switchboard, 6: Transformer room, 7: Conductor room,
8: electrical room, 24: network transformer, 33: protector breaker, 34: take-off breaker, 35: network bus.

Claims (7)

(57) [Claims] 1. A transformer room formed in a network switchboard.
And a conductive chamber formed above the transformer chamber and adjacent to the conductive chamber.
And the electrical room located in front of the network switchboard.
Network transformers are installed horizontally in the transformer room.
And a network motherboard on the network switchboard
A wire is arranged, and the electric chamber is connected to the conductive chamber by a net.
Adjacent in the longitudinal direction of the work transformer,
Network distribution characterized by the arrangement of devices
Board . 2. A network switchboard, comprising :
Partition with the partition plate provided in the electric board, under the partition plate
Is a transformer that accommodates a horizontal network transformer.
A pressure chamber is formed, and the network above the partition plate
The above-mentioned electrical room is formed on the front side of the switchboard.
Note that a conductive chamber is formed on the back side of the electrical chamber.
The network switchboard according to claim 1, wherein 3. The electric device in the electric room, wherein the longitudinal direction is water.
The transformer coil is placed on a flat network transformer.
Claims characterized by being provided in the range where the diameter is added
Item 3. The network switchboard according to item 1 or 2 . 4. A transformer room formed in a network switchboard.
And a conductive chamber or the conductive chamber formed above the transformer chamber.
Adjacent to the electrical room located in front of the network switchboard
Network transformers are installed horizontally in the transformer room.
And a network bus is placed in the conductive room.
And the longitudinal direction of the conductive chamber and the network transformer
Electrical equipment is arranged in the electrical room adjacent to the direction, and
Protector breaker and take-off cutoff as the above electrical equipment
Using a protector circuit breaker and the take-off circuit
The network switchboard between the equipment and the equipment can be separated
Network switchboard characterized by that . 5. A protector circuit breaker disposed in the electric room.
Primary lead guide of the secondary side lead conductor and takeoff breakers
Change the body withdrawal position to the height direction and connect to the network bus.
5. The network connection according to claim 4, wherein
Electric board . 6. A network according to claim 1, wherein the primary lead-out conductor is a second transformer of the network transformer.
Secondary drawer of protector circuit breaker connected to secondary drawer conductor
The conductor and the primary lead-out conductor of the take-off circuit breaker
Network switchboard connected to the network bus
Network transformer horizontally arranged on the network switchboard
And the electricity formed on the upper side of the transformer room
The electrical room where the devices are arranged, the transformer room and the electrical room
And an intake port and an exhaust port, and a motor is provided in the intake port.
Provide a blower that rotates at a fixed speed to the network transformer
Current flows or constant temperature in network transformer
When the temperature rises, the motor is driven to rotate the blower.
A network for cooling both chambers
Switchboard . 7. A plurality of loads, receiving power from an external power supply and stepping down.
A switchboard for supplying power, with the longitudinal direction inside the switchboard
Arrange a plurality of transformers facing upward, and arrange the transformers
To the transformer in the direction of the transformer, and
The breaker to be connected faces the switchboard and the transformer is arranged
Characterized by being arranged along a direction
Switchboard .