JP6793493B2 - Cubicle type power receiving and transforming equipment and cubicle - Google Patents

Description

The present invention relates to a cubicle-type power receiving / transforming facility in which a set of devices for receiving high-voltage power is housed in a metal box (cubicle), and a cubicle used therein.

Conventionally, low-voltage power reception and high-voltage power reception are known as usage forms of commercial power. Low-voltage power reception is a form in which high-voltage power (6600 volt) is converted to low-voltage power (100 volt or 200 volt) by a power company's equipment and used. High-voltage power reception draws high-voltage power into the premises with high voltage and uses it for private power reception. It is a form in which the equipment converts it into low-voltage power and uses it.

In the case of low-voltage power reception, there are cases where a transformer is installed on a utility pole prepared by a power consumer (also called a rented pole) or a transformer is installed in an electric room prepared by a power consumer (also called a rented room). In the case of apartments such as condominiums, there is no effect on the landscape and there is no effect on the living space, so most of them use low-voltage power reception using transformers for apartments, which are the facilities of electric power companies. ing. In the case of high-voltage power receiving, as private power receiving equipment, a cubicle-type power receiving / transforming equipment is prepared, which is a metal box called a cubicle containing a set of equipment for receiving high-voltage power. Conventionally, for example, Patent Document 1 and Patent Document 2 have been known as prior arts related to cubicle type power receiving and transforming equipment.

Conventionally, regarding cubicle-type power receiving and transforming equipment, the size of the entire equipment becomes large and installation space is required because the single-phase transformer and the three-phase transformer, which are configured separately, are housed in the cubicle. There was a challenge.

Therefore, conventionally, one transformer is provided around a three-phase three-legged iron core to form a single-phase modified portion and two three-phase modified portions having different supply voltages to obtain a power supply voltage and a lamp supply voltage. The space-saving cubicle type power receiving and transforming equipment summarized in the above has been known (see, for example, Patent Document 3).

Japanese Unexamined Patent Publication No. 2006-14500 Japanese Unexamined Patent Publication No. 2004-112962 Japanese Unexamined Patent Publication No. 2002-329620

By the way, in the conventional cubicle type current transformer, in addition to the transformer in the cubicle, various facilities such as LBS (high pressure AC load switch) or circuit breaker (for example, VCB (vacuum circuit breaker)) And equipment such as VCT (current transformer for instrument) or CT (current transformer), VT (transformer for instrument) had to be installed.

In this regard, for example, as in the cubicle type power receiving and transforming equipment disclosed in Patent Document 1 and Patent Document 2, the transformer and various equipment other than the transformer such as VCT and LBS are arranged in the cubicle in the height direction. If they are lined up, it is thought that the installation space for cubicle-type power receiving and transforming equipment can be further reduced.

However, such conventional cubicle type power receiving and transforming equipment has not solved the following problems. In cubicle-type power receiving and transforming equipment, inspection and replacement of internal equipment had to be done through the opening / closing door on the front (or side) of the cubicle. In particular, in the inspection / replacement work of the transformer, it was necessary to open the front (or side) opening / closing door to carry the transformer out of the cubicle.

However, since the weight of the transformer is several hundred kg, it is necessary to secure a special worker who provides the labor for transporting heavy objects in the inspection / replacement work of the transformer. If that is not possible, the top of the cubicle must be removed and a crane must be used to lift the transformer. In this case, for example, in the cubicle type power receiving and transforming equipment disclosed in Patent Document 1 and Patent Document 2, various equipments such as VCT and LBS are arranged above the transformer inside the cubicle. Therefore, after disconnecting the wiring connected to the various equipment, the various equipment had to be taken out of the cubicle once, and then the transformer had to be lifted using a crane. Therefore, the cubicle-type power receiving / transforming equipment disclosed in Patent Document 1 and Patent Document 2 has a problem that maintenance / inspection work takes a lot of time and labor.

As described above, in the conventional cubicle type power receiving and transforming equipment, it is desired not only to save the installation space but also to reduce the burden required for maintenance and inspection work as much as possible. Was thought to have potential demand.

The present invention has been made to solve the above problems, and is a cubicle type power receiving / transforming facility that not only saves labor in installation space but also reduces the burden required for maintenance and inspection work. The purpose is to provide a cubicle used for it.

In order to solve the above problems, the present invention is a cubicle type power receiving / transforming facility in which at least a load switch or circuit breaker and a transformer are housed in a metal box, and the box is a lower box. The upper box body is overlapped on the body and has a two-layer structure in which the lower box body and the upper box body are detachable, and the lower box body is formed as an opening with an open upper part and inside. The transformer is housed in the upper box, the load switch or circuit breaker is fixed inside, and the upper box has a front door on the front side and the bottom is arranged on the front side. It is characterized by a cubicle type power receiving / transforming facility having a partially bottomed structure including an opening arranged on the back side of the bottom .

Further, the present invention is a cubicle type power receiving / transforming facility in which at least a load switch or a circuit breaker and a transformer are housed in a metal box, and the box is above the lower box. The boxes are overlapped and have a two-layer structure in which the lower box and the upper box are detachable. The lower box is formed as an opening with an open upper part, and a transformer is housed inside. The upper box body has a load switch or circuit breaker fixed inside, and the box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and the front surface of the upper box body. Provided is a cubicle type power receiving / transforming facility in which a lower front panel on the front side of the lower box body is retracted from a side portion, and a cabinet space large enough to accommodate a high-pressure cabinet is provided on the front side of the lower front panel. ..

Further, the box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and the lower front panel on the front side of the lower box body is retracted from the front side portion of the upper box body. It is preferable that a cabinet space having a size capable of accommodating a high-pressure cabinet is provided on the front side of the lower front panel.

Further, the box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and the lower front panel on the front side of the lower box body is retracted from the front door of the upper box body. Further, when the lower box is fixed to the base pedestal having the cabinet pedestal to which the high pressure cabinet is fixed, the cabinet space large enough to accommodate the high pressure cabinet is below the bottom of the upper box. It is preferable that the box is provided on the upper side of the cabinet pedestal and on the front side of the lower front panel.

Furthermore, the box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and a vertical communication structure in which the upper box body and the lower box body communicate with each other through an opening. However, the load switch or circuit breaker and the instrument transformer are housed together with the transformer, and the upper box is formed with a VCT pedestal to which the instrument transformer is fixed at the opening. An instrument transformer is fixed to the VCT pedestal, and the lower box body has a lower front panel arranged on the front side, and the high-voltage cabinet is located on the front side of the lower front panel and on the lower side of the bottom . A cabinet space is provided according to the external dimensions, and a cabinet pedestal for fixing the high-voltage cabinet is placed on the front side of the lower front panel facing the cabinet space, and a transformer is housed on the back side of the cabinet space. Is preferable.

The cubicle type power receiving / transforming equipment can have a cabinet built-in structure in which the high-voltage cabinet is incorporated by fixing the high-voltage cabinet to the cabinet pedestal portion.

Further, the lower side door is formed on the side surface of the lower box body, and the upper side door having a size corresponding to the VCT pedestal is arranged at a position corresponding to the VCT pedestal on the side surface of the upper box body. it can.

The cubicle type power receiving / transforming equipment preferably has a compartmentalized accommodation structure in which a transformer and a low-voltage equipment are housed in a lower box and a high-voltage equipment including a load switch or a circuit breaker is housed in the upper box.

The present invention is a cubicle constituting a cubicle type power receiving / transforming facility in which at least a load switch or a circuit breaker and a transformer are housed, and the cubicle has an upper box body on a lower box body. A transformer pedestal that overlaps and has a two-layer structure in which the lower box body and the upper box body are detachable, the lower box body is formed as an opening with an open upper part, and a transformer is fixed. Is formed inside, and the upper box body is partially bottomed with a front door provided on the front side and a bottom portion arranged on the front side and an opening arranged on the back side of the bottom portion. A cubicle having a structure is provided.

As described in detail above, according to the present invention, a cubicle type power receiving / transforming facility and its use that not only saves labor in installation space but also reduces the burden required for maintenance and inspection work. You will get a cubicle.

It is a front view of the cubicle type power receiving and transforming apparatus which concerns on embodiment of this invention. It is a right side view of the cubicle type power receiving and transforming equipment which concerns on embodiment of this invention. It is a left side view of the cubicle type power receiving and transforming equipment which concerns on embodiment of this invention. It is a perspective view which shows the front door open state of the upper box body which comprises the cubicle type power receiving and transforming facility of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a perspective view which shows the upper box body and the main part of the lower box body. It is a front view of the cubicle type power receiving and transforming facility which showed the main part by removing the lower front panel, the front right door, the front upper door, the upper front right door, and the upper front left door. It is a left side view of a cubicle type power receiving and transforming facility which opened the lower left side door and the upper left side door, and showed the main part inside. It is the same left side view as FIG. 8 in which the lower box body and the upper box body are released from the fixed integration, and the upper box body is lifted together with the ceiling panel and a part thereof is omitted. It is a right side view which is the same as FIG. 2 of the cubicle type power receiving and transforming equipment which concerns on a modification. Similarly, it is a left side view similar to FIG. Similarly, it is a left side view which shows the upper box body. Similarly, it is a left side view similar to FIG. 8 showing the main part. It is the same right side view as FIG. 2 of the cubicle type power receiving and transforming equipment which concerns on another modification. It is the same right side view as FIG. 2 of the cubicle type power receiving and transforming equipment which concerns on still another modification. It is the same left side view as FIG. 3 of the cubicle type power receiving and transforming equipment which concerns on still another modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are used for the same elements, and duplicate description will be omitted.

(Cubicle type power receiving and transforming equipment configuration)
First, the configuration of the cubicle type power receiving / transforming facility 101 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9. Here, FIG. 1 is a front view of the cubicle type power receiving / transforming facility 101, FIG. 2 is a right side view, and FIG. 3 is a left side view. FIG. 4 is a perspective view showing a front door open state of the upper box body 31 of the cubicle type power receiving / transforming equipment 101, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, and FIG. It is a perspective view which shows the main part of 1.

The cubicle type power receiving and transforming equipment 101 includes a cubicle 100 shown in FIGS. 1 to 6, a transformer 51 housed in the cubicle 100, and a high-voltage AC as shown in FIGS. 7 to 9. It has a load switch (LBS) 65 and power receiving and transforming equipment such as a VCT (instrument transformer transformer) 61. The cubicle type power receiving / transforming equipment 101 shown is a PF-S type (power fuse switch type), and a high-voltage AC load switch (LBS) is provided in the cubicle 100 as a main shutoff device for switching a high-voltage load current. ) 65 is housed.

As shown in FIGS. 1 to 3, the cubicle 100 is a metal box body, and has a lower box body 1 and an upper box body 31. The bottom pedestal 5 arranged at the bottom of the lower box 1 is fixed to the base pedestal 90, and a removable ceiling panel 91 is attached to the upper part of the upper box 31. The cubicle 100 has a two-layer structure in which the upper box body 31 is overlapped on the lower box body 1 and the lower box body 1 and the upper box body 31 are detachable.

Further, as shown in detail in FIG. 2, the cubicle 100 has a structure in which the depth D1 of the lower box body 1 is smaller than the depth D31 of the upper box body 31 (depth difference structure).

The cubicle type power receiving / transforming equipment 101 has a divisional accommodation structure for the equipment. In this compartmentalized accommodation structure, low-voltage equipment is mainly accommodated inside the lower box 1 in addition to the transformer 1, and high-voltage equipment is mainly accommodated inside the upper box 31, so that the cubicle 100 is accommodated. It means a structure in which the power receiving and transforming equipment is divided into two parts, a lower part and an upper part. In the present embodiment, the low-voltage equipment corresponds to equipment operated at a low voltage (100 volts or 200 volts) such as the LC unit 56 described later and the MCCB (molded case circuit breaker) 74. The high-voltage equipment corresponds to equipment operated at high voltage (6600 volts) such as VCT61, watt-hour meter 63, high-voltage AC load switch (LBS) 65, and lightning arrester 67.

The lower box body 1 has a lower front panel 2, a lower right side door 3, a lower left side door 4, a bottom pedestal 5, and a back panel 6. The lower front panel 2 and the back panel 6 are metal plate-shaped panel bodies, which are fixed to a metal frame (not shown) constituting the box body by welding or the like. The front right door 2b is provided on the lower right side door 3 side of the lower front panel 2, and the front upper doors 2c and 2d are provided on the upper box body 31 side. Further, the lower box body 1 is an upper opening 1a (see FIG. 6) in which the upper part (the portion closest to the upper box body 31) is open (not closed). The inside of the lower box 1 and the inside of the upper box 31 communicate with each other via the upper opening 1a and the lower opening 38 of the upper box 31, which will be described later. A structure in which the inside of the lower box body 1 and the inside of the upper box body 31 communicate with each other through both openings corresponds to a vertical communication structure.

The lower front panel 2 is arranged at a position retracted to the back panel 6 side (with a size corresponding to the depth of the bottom plate 36 described later) from the upper front right door 32 and the upper front left door 33 described later. .. Further, as shown in FIG. 2, when the bottom pedestal 5 is fixed to the base pedestal 90, it is below the bottom plate 36, above the base pedestal 90 (cabinet pedestal 90a described later), and below. A space is provided on the front side of the front panel 2. The space is a cabinet space 12 having a size capable of accommodating the high-pressure cabinet 120. Since the cabinet space 12 has a size equal to or slightly larger than the external dimensions of the high-pressure cabinet 120, the high-pressure cabinet 120 is arranged as shown by imaginary lines in FIGS. 2 and 3. The transformer 51 is housed in the lower box 1 on the back side thereof.

The bottom pedestal 5 is formed by pumping up a plurality of C-shaped channel materials, and constitutes the bottom of the lower box body 1. As shown in FIG. 2, a plurality of ventilation holes 5b are formed in each C-shaped channel material. The bottom pedestal 5 is fixed to the base pedestal 90. Further, a flat plate-shaped transformer pedestal 5c (see FIG. 7) is fixed to the bottom pedestal 5 inside the lower box body 1. The transformer 51 is fixed to the transformer pedestal 5c. A cable hole (not shown) is secured in the bottom pedestal 5, and a high-voltage cable 52 and a low-voltage cable 72, which will be described later, are inserted into the cable hole (not shown).

The base pedestal 90 is also formed by pumping up a plurality of C-shaped channel materials. The base pedestal 90 has a cabinet pedestal portion 90a. The cabinet pedestal portion 90a is a portion arranged on the front side of the lower front panel 2 when the bottom pedestal 5 is fixed to the base pedestal 90 as described above. The high-pressure cabinet 120 is fixed to the cabinet pedestal portion 90a. Then, by fixing the high-voltage cabinet 120 to the cabinet pedestal portion 90a, the cubicle-type power receiving / transforming equipment 101 is provided with a cabinet built-in structure (cabinet built-in structure) in which the high-voltage cabinet is incorporated.

The lower right side door 3 and the lower left side door 4 are arranged on the right side and the left side when viewed from the front of the lower box body 1, respectively. The lower right side door 3 and the lower left side door 4 are rotatably attached to the right side portions 9a and 9b of the metal frame, respectively. Further, by operating the respective door handles 3a and 4a, the respective engaging portions (not shown) are activated, and the engaging portions engage with the locking holes (not shown) of the metal frame. Both the lower right side door 3 and the lower left side door 4 have a two-fold structure, and when opened, they are folded in half at the central portion in the width direction.

When the lower right side door 3 or the lower left side door 4 is opened, the side opening 3b of the lower box 1 appears as shown in FIG. The transformer 51 and low-voltage equipment such as the LC unit 56 and the MCCB (molded case circuit breaker) 74 can be visually recognized through the side opening 3b.

Then, as shown in FIG. 6, overhanging portions 10 are formed on the front side, the back side, and the left and right side surfaces of the upper surface of the metal frame of the lower box body 1, respectively. Each overhanging portion 10 is a small protrusion extending toward the inside of the lower box body 1. Bolt holes 10a are formed in each overhanging portion 10. Further, a waterproof packing 11 made of rubber or the like is fixed to the upper surface of the metal frame including each overhanging portion 10. Further, lifting hooks 10b are formed on both left and right sides of the upper surface of the metal frame.

The upper box body 31 includes an upper front right door 32, an upper front left door 33, an upper right side door 34, an upper left side door 35, a right side panel 35c, a left side panel 35d, a bottom plate 36, and a VCT pedestal. It has 37, equipment fixing members 39a and 39b, and a back panel 40. The upper box body 31 has a partially bottomed structure in which the bottom plate 36 is the bottom portion and the back surface side thereof is the lower opening 38. The right side panel 35c, the left side panel 35d, and the back panel 40 are metal plate-shaped panel bodies, which are fixed to the metal frame 45 constituting the box body by welding or the like. An opening 35e is formed in the right side panel 35c and the left side panel 35d. As shown in FIG. 8, the opening 35e appears when the upper left side door 35 is opened. Although not shown, the opening 35e also appears when the upper right side door 34 is opened.

The upper front right door 32 and the upper front left door 33 are arranged on the right side and the left side when viewed from the front of the upper box body 31, respectively. The upper front right door 32 and the upper front left door 33 are attached to the front portion 44 of the metal frame 45 so as to be openable and closable. By operating the door handles 32a and 33a, the engaging portions (not shown) are activated, and the engaging portions engage with the locking holes 44b of the metal frame 45. Monitoring windows 43a and 43b are formed on the upper front right door 32 and the upper front left door 33, respectively.

The upper right side door 34 and the upper left side door 35 are attached to the metal frame 45 so as to be openable and closable. Further, by operating the door handles 34a and 35a, the engaging portions (not shown) are activated, and the engaging portions engage with the locking holes (not shown) of the metal frame. Both the upper right side door 34 and the upper left side door 35 have a two-fold structure, and when opened, they are folded in half at the central portion in the width direction. The upper right side door 34 and the upper left side door 35 have a width corresponding to the length of the VCT pedestal 37 (the length in the direction from the front side to the back side) described later, and have a size corresponding to the VCT pedestal 37. The door is arranged at a position corresponding to the fixed position of the VCT pedestal 37.

Then, as shown in FIG. 4, the upper box body 31 has a bottom plate 36 fixed to the front side of the bottom of the right side panel 35c and the left side panel 35d (the portion with dots in FIG. 4). The back side of the bottom plate 36 is an open lower opening 38, and a VCT pedestal 37 is formed at a position on the upper left side door 35 side of the lower opening 38. Further, the equipment fixing members 39a and 39b are fixed to the bottom plate 36.

The bottom plate 36 has a size of about half to 40% of the bottom portion of the upper box body 31, is a metal plate material having a flat surface, and constitutes the bottom portion of the upper box body 31. Both ends of the bottom plate 36 in the left-right width direction are fixed to the right side panel 35c and the left side panel 35d by welding or the like. Further, a ventilation hole 36a is formed in the bottom plate 36. In this way, in the upper box body 31, the front side portion of the bottom portion is a closed bottom portion in a state of being substantially closed (not opened).

The VCT pedestal 37 is formed by using two elongated plate members. The surface of each plate material is flat, and both ends in the length direction are fixed to the bottom plate 36 and the back panel 40 by welding or the like. The plate members are arranged at intervals according to the external dimensions of the housed VCT61. There is an open gap between the VCT pedestal 37, the left side panel 35d, and the right side panel 35c. The VCT 61 is fixed to the VCT pedestal 37.

The equipment fixing members 39a and 39b are substantially L-shaped members formed by bending a metal plate to form a fixing plate portion and a mounting plate portion having a longer length than the fixing plate portion. The equipment fixing members 39a and 39b are fixed on the bottom plate 36 so that the respective mounting plate portions stand upright in the substantially vertical direction of the bottom plate 36. The equipment fixing member 39b is arranged on the front side of the VCT pedestal 37, and the equipment fixing member 39a is arranged on the right side thereof.

The mounting plate portions of the equipment fixing members 39a and 39b have a height of about 80% of the upper box body 31. A high-pressure AC load switch (LBS) 65, which will be described later, is fixed to the mounting plate portion of the equipment fixing member 39a.

Further, the watt hour meter (Wh) 63 is fixed to the mounting plate portion of the equipment fixing member 39b. The watt hour meter (Wh) 63 is visually recognized from the outside through the monitoring window 43b. Further, as shown in FIG. 8, a lightning arrester (LA) 67 is fixed to the bottom plate 36.

Then, as shown in FIG. 6, a plurality of overhanging portions 47 are formed on the bottom surface (the portion surrounding the lower opening 38) of the metal frame 45 of the upper box body 31. Each overhanging portion 47 is formed at a position corresponding to each overhanging portion 10 of the lower box body 1, and is a small protrusion similar to each overhanging portion 10. Bolt holes 47a are formed in each overhanging portion 47. By inserting bolts into the bolt holes 47a and the bolt holes 10a of each overhanging portion 10 and fastening the nuts, the lower box body 1 and the upper box body 31 are fixed and integrated, and the bolts and nuts are fixed and integrated. By removing the above, the fixed integration of the upper box body 31 and the lower box body 1 is released.

Subsequently, the transformer 51 housed in the cubicle 100, the low-voltage equipment and the high-voltage equipment will be described mainly with reference to FIGS. 7 to 9. FIG. 7 shows the cubicle type power receiving / transforming equipment 101 in which the lower front panel 2, the front right door 2b, the front upper door 2c, 2d, the upper front right door 32, and the upper front left door 33 of the cubicle 100 are removed to show the main part. Front view, FIG. 8 is a left side view of a cubicle type power receiving / transforming facility 101 in which the lower left side door 4 and the upper left side door 35 are opened to show the main part inside, and FIG. 9 is a lower box body 1 and an upper box body. It is the same left side view as FIG. 8 in which the upper box body 31 is lifted together with the ceiling panel 91 by releasing the sticking integration with 31 and partially omitting it.

As shown in FIG. 7, a high-voltage cable (6600 volts) 52 is pulled into the lower box body 1 from the ground through the hand hole H shown in FIG. The high-voltage cable 52 is pulled in through a cable hole (not shown) of the bottom pedestal 5. In FIG. 7, the high-voltage cable 52 is drawn on the right side of the transformer 51 for convenience of illustration, but as shown in FIG. 8, the high-voltage cable 52 is pulled in from the back side of the transformer 51. As shown in FIG. 7, a breaker panel 59 to which various breakers are fixed is arranged on the right side of the transformer 51. Since the front right door 2b is arranged on the front side thereof, various breakers can be operated by opening the front right door 2b.

Then, as shown in FIG. 8, the high-voltage lead wire 57 enters the upper box body 31 from the lower box body 1 through the upper opening 1a and the lower opening 38, and the high-voltage lead wire 57 allows the high-voltage cable (6600 volts). ) 52 and the primary terminal 61a of the VCT 61 are connected. Further, the secondary side terminal 61b of the VCT 61 is connected to the power supply side terminal (not shown) of the LBS 65 via the high voltage lead wire 62. The power supply side terminal is also connected to the lightning arrester 67 via a disconnector (DS) (not shown). The VCT 61 is also connected to the watt hour meter 63 via a 7-core cable.

In the LBS 65, a load-side terminal (not shown) is formed via a power fuse 65a, and the load-side terminal is connected to a high-voltage lead wire 66. The high-voltage lead wire 66 enters the lower box 1 from the upper box 31 through the lower opening 38 and the upper opening 1a. In this way, the high-voltage lead wire 66 connects the load-side terminal of the LBS 65 and the high-voltage side terminal 51a of the transformer 51.

On the other hand, in the lower box body 1, the low-voltage side terminal 51b of the transformer 51 is connected to the LC unit 56 via the low-voltage lead wire 71. The LC unit 56 is a phase-advancing device having a structure in which a series reactor and a capacitor are integrated, and is housed in a lower box body 1. Further, the low-voltage side terminal 51b is connected to the MCCB (molded case circuit breaker) 74, the low-voltage side VT (instrument transformer) and CT (instrument transformer) 75, and the breaker panel 59 (details) via the low-voltage lead wire 71. Is also connected to various breakers). The front upper doors 2c and 2d are arranged on the front side of the low-voltage side voltmeter / ammeter 73, the high-voltage side voltmeter 69a, and the high-voltage side ammeter 69b. Further, the output terminal of the MCCB 74 is connected to the low voltage lead wire 72. The low pressure lead wire 72 is connected to the outside of the cubicle 100. Low-voltage side voltmeter / ammeter 73, MCCB74, low-voltage side VT (voltage transformer) and CT (current transformer for instrument) 75, breaker panel 59, high-voltage side voltmeter 69a, high-voltage side ammeter 69b are all lower. It is housed in the box 1.

Then, in the cubicle type power receiving / transforming equipment 101 as described above, the maintenance / inspection and replacement work of the transformer 51 is performed as follows.

First, the cable connecting the high-voltage equipment housed in the upper box 31 and the low-voltage equipment housed in the lower box 1 is disconnected. In the case of the cubicle type power receiving / transforming equipment 101, at least the connection of the high-voltage lead wire 57 and the high-voltage lead wire 66 and the ground wire (ground wire) (not shown) may be disconnected as shown in FIG.

Since the cubicle type power receiving / transforming equipment 101 has an equipment divisional accommodation structure, the upper box 31 and the lower box 1 mainly accommodate high-voltage equipment and low-voltage equipment, respectively. Unlike this, if the low-voltage equipment was distributed and housed in both the upper box 31 and the lower box 1, for example, the low-voltage side voltmeter / ammeter 73 was housed in the upper box 31. Consider the case where the MCCB 74 is housed in the lower box body 1. Then, wiring (also referred to as additional low voltage wiring) connecting the low voltage equipment (low voltage side voltmeter / current meter 73) housed in the upper box 31 and the low voltage side terminal 51b of the transformer 51 is required. Like the high-voltage lead wires 57 and 66, it passes through both the upper box body 31 and the lower box body 1. In the maintenance / inspection / replacement work of the transformer 51, it is necessary to remove this additional low-voltage wiring as well, so that the maintenance / inspection work requires time and effort.

However, the cubicle type power receiving / transforming equipment 101 does not require wiring such as additional low voltage wiring. Therefore, the cubicle type power receiving / transforming equipment 101 has a smaller number of wirings connecting the upper box body 31 and the lower box body 1 as compared with the case where the equipment does not have a divisional accommodation structure.

Then, for example, in the cubicle type power receiving / transforming equipment 101, if the connection between the high-voltage lead wire 57 and the high-voltage lead wire 66 is disconnected as in the cases of FIGS. 8 and 9, the lower box body 1 and the upper box body 31 are connected. The electrical connection is eliminated, and the upper box body 31 can be removed from the lower box body 1. As described above, the cubicle type power receiving / transforming equipment 101 has a divisional accommodation structure for the equipment, so that the number of cables and the like that travel between the upper box body 31 and the lower box body 1 is the minimum necessary. It has become. Therefore, it is possible to save the time and effort required for disconnecting the cable and restoring the connection. It is possible to reduce the burden required for maintenance and inspection work.

In addition, if the number of cables is large, there is a possibility that a connection error may occur by connecting the cables to a facility other than the original one when restoring the cable connection. However, in the cubicle type power receiving / transforming equipment 101, the possibility of making such a mistake is extremely low.

Subsequently, the bolts inserted into the bolt holes 47a of the overhanging portion 47 of the upper box body 31 and the bolt holes 10a of the overhanging portion 10 of the lower box body 1 are removed. After that, a wire is attached to the pulling hook 91a of the ceiling panel 91, and the upper box 31 is lifted by a crane (not shown). Then, high-voltage equipment such as VCT61, watt-hour meter 63, and LBS65 are housed in the upper box 31, and all of them are fixed to the upper box 31, so that high-voltage equipment such as VCT61 is installed in the upper box. It can be moved to another place at once together with 31. In this way, the labor and time required for the movement can be significantly reduced as compared with the case where the VCT 61, the watt-hour meter 63, the LBS 65, etc. are moved individually. Further, if the number of high-voltage equipment accommodated increases, the labor and time required for movement may increase accordingly, but even in that case, the labor and time required for movement will change in the cubicle type power receiving and transforming equipment 101. Absent.

Subsequently, the cable connected to the transformer 51 is disconnected, the bolt is removed to release the fixing to the transformer pedestal 5c, and then the hook and wire of the crane are dropped from the upper opening 1a of the lower box body 1. , The hook is hung on the transformer 51 to lift the transformer 51. Then, since the upper opening 1a is formed in the lower box 1 and the upper portion is open, the transformer 51 can be carried out of the lower box 1.

As described above, in the cubicle type power receiving / transforming equipment 101, a special worker who provides a labor for transporting a heavy object is not required for maintenance / inspection / replacement of the transformer 51. Further, in the cubicle type power receiving / transforming equipment 101, the cubicle 101 has a two-layer structure of a lower box body 1 and an upper box body 31, and the high pressure equipment is housed in the upper box body 31, so that the high pressure equipment Can be moved together with the upper box body 31 to another place at once. Equipment that is likely to get in the way when the transformer 51 is carried out can be moved in advance.

Therefore, in the cubicle type power receiving / transforming equipment 101, it is possible to reduce the burden required for the maintenance / inspection work of the equipment. Of course, the cubicle type power receiving / transforming equipment 101 has a vertical structure in which the cubicle 100 overlaps the lower box body 1 and the upper box body 31, and the power receiving / transforming equipments are arranged in the height direction. The installation space can be saved.

Further, since the upper box body 31 has a partially bottomed structure formed by the bottom plate 36 and the lower opening 38, the high-pressure equipment can be fixed inside the upper box body 31 and moved integrally with the upper box body 31. However, communication with the lower box body 1 can be surely secured. As a result, the cubicle type power receiving / transforming equipment 101 can be provided with a vertical communication structure while the upper box body 31 and the lower box body 1 are separate boxes, whereby the high-voltage equipment in the upper box body 31 and the high-voltage equipment in the upper box body 31 can be provided. The connection of the lower box body 1 with the low-voltage equipment can be surely obtained.

Further, in the cubicle type power receiving / transforming equipment 101, a cabinet space 12 is provided on the front side of the lower front panel 2, and the high-voltage cabinet 120 can be arranged in the cabinet space 12.

In the conventional cubicle-type power receiving / transforming equipment, it is necessary to separately secure the installation space for the high-voltage cabinet as well as the installation space for the cubicle-type power receiving / transforming equipment. Therefore, even if the installation space for the cubicle type power receiving and transforming equipment can be saved, it is impossible to save the labor for the installation space of the high-voltage cabinet.

On the other hand, in the cubicle type power receiving / transforming equipment 101 according to the embodiment of the present invention, since the high-voltage cabinet 120 can be arranged in the cabinet space 12, it is not necessary to separately secure the installation space for the high-voltage cabinet 120. Therefore, not only the installation space of the cubicle type power receiving / transforming equipment 101 itself can be saved, but also the installation space of the high voltage cabinet can be saved, and the installation space of the cubicle type power receiving / transforming equipment 101 and the high voltage cabinet 120 as a whole can be saved. Labor can be saved. Therefore, the cubicle type power receiving / transforming equipment 101 can realize further labor saving in the installation space as compared with the conventional case.

Further, in the cubicle type power receiving / transforming equipment 101, when the bottom pedestal 5 is fixed to the base pedestal 90, a cabinet space 12 is secured on the front side of the lower front panel 2 and the high voltage cabinet 120 is fixed to the cabinet pedestal 90a. Then, it can be made into a cabinet built-in structure. Then, the cubicle type power receiving / transforming equipment 101 and the high-voltage cabinet 120 can be fixed to the base pedestal 90 in advance, and both of them can be installed together with the base pedestal 90. By doing so, the installation work at the site can be saved compared to the case where the cubicle type power receiving / transforming equipment and the high-voltage cabinet are installed separately. Therefore, the cubicle type power receiving / transforming equipment 101 also realizes labor saving at the site construction. it can.

Moreover, if the fixed state of the cubicle type power receiving / transforming equipment 101 to the base pedestal 90 is released (the fixed state of the bottom pedestal 5 and the base pedestal 90 is released), only the cubicle type power receiving / transforming equipment 101 is left with the high voltage cabinet 120. Can also be moved and removed.

On the other hand, when the cubicle type power receiving / transforming equipment 101 has a cabinet built-in structure, the high voltage cabinet 120 is arranged on the front side of the lower front panel 2. When the high-pressure cabinet 120 is not arranged on the front side of the front right door 2b, the front upper door 2c, 2d (the high-pressure cabinet 120 is arranged so as to avoid the front right door 2b, the front upper door 2c, 2d). Can perform maintenance / inspection work inside the lower box body 1 from the front side through the front right door 2b, front upper door 2c, and 2d, but maintenance / inspection work inside the lower box body 1 as a whole is difficult.

However, in the cubicle type power receiving / transforming equipment 101, the lower right side door 3 and the lower left side door 4 are arranged on the side surface of the lower box 1, and by opening them, the entire inside of the lower box 1 can be opened. Can perform maintenance and inspection work. Further, since the upper right side door 34 and the upper left side door 35 are formed on the side surface of the upper box body 31 from the VCT pedestal 37 (on the back panel 40 side), maintenance, inspection, and replacement work of the VCT 61 can be easily performed. You can. Since the lower right side door 3 and the lower left side door 4 have a two-fold structure, the lower right side door 3 and the lower left side even if there is little space on the left and right outside of the cubicle type power receiving and transforming equipment 101. The door 4 can be opened.

Further, since the VCT pedestal 37 is arranged closer to the upper left side door 35 side, the VCT 61 is arranged immediately inside the upper left side door 35. Therefore, it is possible to reduce the work load when the electric power company installs the VCT 61 in the upper box 31 or when the VCT 61 is maintained, inspected, or replaced.

On the other hand, the cubicle type power receiving / transforming equipment 101 is provided with a VCT pedestal 37, and the VCT pedestal 37 is arranged on the back panel 40 side of the bottom plate 36. Among the high-voltage equipment housed in the upper box 31, the VCT61 has a relatively large external dimension and weighs several tens of kg. Therefore, if the VCT 61 is fixed to the portion of the upper box body 31 that overhangs the lower box body 1 (the portion where the bottom plate 36 is formed), the weight of the front side portion of the upper box body 31 is increased. It gets heavy. Nevertheless, the lower side thereof is unsupported due to the cabinet space 12, and therefore the weight balance is deteriorated and the cubicle 100 tends to tilt toward the front side. In this regard, if the VCT pedestal 37 is arranged on the back panel 40 side of the bottom plate 36 and the VCT 61 is fixed there, as in the cubicle type power receiving / transforming equipment 101, the lower box body 1 is supported on the lower side thereof. Therefore, there is no risk that the weight balance will deteriorate.

(Modification example 1)
Subsequently, the cubicle type power receiving / transforming facility 201 according to the first modification will be described with reference to FIGS. 10 to 13. The cubicle-type power receiving / transforming facility 201 is different from the cubicle-type power receiving / transforming facility 101 in that it has a cubicle 200. The cubicle 200 is different from the cubicle 100 in that it has a lower box body 111 and an upper box body 131 instead of the lower box body 1 and the upper box body 31.

The lower box body 111 differs from the lower box body 1 in that it has a lower right side door 3, a right side door 103 instead of the lower left side door 4, and a left side door 104. There is. The right side door 103 has a size corresponding to the lower right side door 3 and the upper right side door 34, and the left side door 104 has a size corresponding to the lower left side door 4 and the upper left side door 35. doing. The right side door 103 and the left side door 104 can open and close the side opening 3b of the lower box 1 and the opening 35e of the upper box 31 with only one door each. The right side door 103 and the left side door 104 also have a two-fold structure.

Therefore, the cubicle type power receiving / transforming equipment 201 can reduce the number of times the door is opened / closed as compared with the cubicle type power receiving / transforming equipment 101. In addition, since the number of places where the door is attached can be reduced, the burden (cost and time) required for manufacturing can be reduced. In addition, since the cubicle type power receiving / transforming equipment 201 has the same configuration as the cubicle type power receiving / transforming equipment 101, it has the same function and effect as the cubicle type power receiving / transforming equipment 101.

(Modification 2)
Subsequently, the cubicle type power receiving / transforming facility 101A according to the second modification will be described with reference to FIG. The cubicle-type power receiving / transforming equipment 101A is different from the cubicle-type power receiving / transforming equipment 101 in that it has a cubicle 100A. The cubicle 100A is different from the cubicle 100 in that it has a lower box body 1A and an upper box body 31A instead of the lower box body 1 and the upper box body 31.

The lower box body 1A is different in shape from the lower right side door 3 and the lower left side door 4 as compared with the lower box 1. In this case, the lower right side door 3 and the lower left side door 4 have an uneven structure in which the central portion of the upper end portion projects upward from both side portions thereof. The shape of the upper right side door 34 and the upper left side door 35 of the upper box body 31A is different from that of the lower box body 31. In this case, the upper right side door 34 and the upper left side door 35 are recessed in the central portion in accordance with the protrusion of the central portion in the lower right side door 3 and the lower left side door 4. The lower right side door 3, the lower left side door 4, the upper right side door 34, and the upper left side door 35 each have a panel-like structure instead of a two-fold structure.

Since such a cubicle-type power receiving / transforming facility 100A has the same configuration as the cubicle-type power receiving / transforming facility 101, it has the same function and effect as the cubicle-type power receiving / transforming facility 101. Although not shown, not only the lower right side door 3, the lower left side door 4, the upper right side door 34, and the upper left side door 35, but also the lower box body 1A and the upper box body 31A have the same uneven structure. Frame may have.

(Modification 3)
Subsequently, the cubicle type power receiving / transforming facility 101B according to the third modification will be described with reference to FIG. The cubicle-type power receiving / transforming facility 101B is different from the cubicle-type power receiving / transforming facility 101 in that it has a cubicle 100B. The cubicle 100B is different from the cubicle 100 in that it has a lower box body 113 instead of the lower box body 1.

The lower box body 113 is different from the lower box body 1 in that the lower front panel 2 is not retracted and the cabinet space 12 is not provided. Such a cubicle-type power receiving / transforming facility 101B also has a two-layer structure similar to that of the cubicle-type power receiving / transforming facility 101 with the lower box body 113 and the upper box body 31, and thus transforms in the same manner as the cubicle-type power receiving / transforming facility 101. Maintenance / inspection and replacement work of the vessel 51 can be performed. Therefore, even with the cubicle type power receiving / transforming equipment 101B, it is possible to reduce the burden required for the maintenance / inspection work of the equipment.

(Modification example 4)
Subsequently, the cubicle type power receiving / transforming facility 101C according to the modified example 4 will be described with reference to FIG. The cubicle-type power receiving / transforming equipment 101C is different from the cubicle-type power receiving / transforming equipment 101 in that it has a cubicle 100C. The cubicle 100C has a bottom pedestal 25 instead of the bottom pedestal 5 as compared to the cubicle 100. The bottom pedestal 5 of the cubicle type power receiving / transforming equipment 101 described above did not have a cabinet pedestal portion, but the bottom pedestal 25 of the cubicle 100C has a cabinet pedestal portion 5a. The bottom pedestal 25 has a greater depth than the bottom pedestal 5, and the portion protruding toward the front side of the lower front panel 2 is the cabinet pedestal portion 5a.

The cubicle-type power receiving / transforming equipment 101C is provided with a cabinet built-in structure by fixing the high-voltage cabinet 120 to the cabinet pedestal portion 5a. In the cubicle type power receiving and transforming equipment 101, the cubicle 100 and the high voltage cabinet 120 are integrated via the base pedestal 90, but in the cubicle type power receiving and transforming equipment 101C, the cubicle 100C and the high voltage cabinet 120 do not have the base pedestal 90. Even if it is integrated.

In the above embodiment, the PF-S type cubicle type power receiving / transforming equipment 101 is described as an example, but the present invention is also applicable to the CB (circuit breaker type) cubicle type power receiving / transforming equipment. The former is mainly used when the capacity is 300 kVA or less, and the latter is used when the capacity exceeds 300 kVA. In the case of CB (circuit breaker type) cubicle type power receiving and transforming equipment, a circuit breaker is housed as the main circuit breaker that opens and closes the high-voltage load current, thereby overloading, short-circuiting, etc. in the high-voltage electric circuit and equipment. The electric circuit is cut off in the event of an accident. Examples of the circuit breaker include a vacuum circuit breaker (VCB), a magnetic circuit breaker (MBB), a gas circuit breaker (GCB), and an oil circuit breaker (OCB).

The above description is a description of embodiments of the present invention, and does not limit the apparatus and method of the present invention, and various modifications can be easily carried out. The present invention also includes an apparatus or method configured by appropriately combining components, functions, features, or method steps in each embodiment.

For example, in the above embodiment, the box body in which the transformer 51 is housed is the lower box body 1, and the box body in which other equipment such as LBS65 and VCT61 is housed is the upper box body 31, but the lower part thereof. At least one of the box body 1 and the upper box body 31 may have a two-layer structure divided into upper and lower parts (not shown). In this case, the cubicle 100 has a structure of three or more layers as a whole, but has a structure in which the upper box body 31 is overlapped on the lower box body 1, and therefore is included in the two-layer structure in the present invention.

In the cubicle type power receiving / transforming equipment 101, the high-voltage cable 52 is pulled into the lower box 1 from the ground, but it may be pulled into the upper box 31 from the upper side of the upper box 31. In the upper box body 31, the equipment fixing member 39a is fixed to the bottom plate 36, and the high-pressure AC load switch (LBS) 65 is fixed to it, but a fixing member (not shown) different from the equipment fixing member 39a is the upper box body. It may be fixed (or formed) inside (for example, a side surface portion) of 31 and a high pressure AC load switch (LBS) 65 may be fixed thereto.

In the above embodiment, the case where the cubicle type power receiving / transforming equipment 101 is provided with the VCT pedestal 37 and the VCT61 is fixed therein is described as an example, but the VCT61 is housed in the cubicle type power receiving / transforming equipment 101. It may be installed outside (for example, on a utility pole) without using it. In this case, the upper box body 31 can be constructed without the VCT pedestal 37.

Further, in the cubicle type power receiving / transforming equipment 101, the back panel 6 of the lower box 1 and the back panel 40 of the upper box 31 are connected flatly without a step, but are connected so as to have a step on both sides. You may be. For example, if the wall surface on the back side of the lower box body 1 protrudes from the wall surface of the upper box body 31 due to the installation location of the cubicle type power receiving / transforming equipment 101, the lower box body 1 may protrude according to the protrusion. The back panel 6 may be shifted toward the front side of the back panel 40 of the upper box body 31, and a step may be formed between the two accordingly (not shown).

By applying the present invention, not only the installation space can be saved, but also the burden required for maintenance and inspection work can be reduced. The present invention can be used in the field of cubicle type power receiving and transforming equipment and cubicles used therein.

1,1A, 111, 113 ... Lower box body, 2 ... Lower front panel, 3 ... Lower right side door, 4 ... Lower left side door, 5 ... Bottom pedestal, 5a ... Cabinet pedestal, 12 ... Cabinet space, 31, 31A , 131 ... Upper box body, 32 ... Upper front left door, 33 ... Upper front right door, 34 ... Upper right side door, 35 ... Upper left side door, 36 ... Bottom plate, 37 ... VCT pedestal, 38 ... Lower opening, 51 ... Transformer, 61 ... VCT, 63 ... Power meter, 65 ... LBS, 90 ... Base pedestal, 100, 100A, 100B, 100C, 200 ... Cubicle, 101, 101A, 101B, 101C, 201 ... Cubicle type power receiving and transforming Equipment, 103 ... right side door, 104 ... left side door, 120 ... high pressure cabinet.

Claims (9)

A cubicle-type power receiving / transforming facility in which at least a load switch or circuit breaker and a transformer are housed in a metal box.
The box body has a two-layer structure in which the upper box body is overlapped on the lower box body and the lower box body and the upper box body are detachable.
The lower box body is formed as an opening whose upper part is open, and the transformer is housed inside.
The load switch or circuit breaker is fixed to the inside of the upper box body.
Said upper box body, key Yubikuru having a bottom portion which is arranged a front door provided on the front side and the front side, a partial bottomed structure having an opening which is arranged on the rear side of the bottom portion Type power receiving and transforming equipment. A cubicle-type power receiving / transforming facility in which at least a load switch or circuit breaker and a transformer are housed in a metal box.
The box body has a two-layer structure in which the upper box body is overlapped on the lower box body and the lower box body and the upper box body are detachable.
The lower box body is formed as an opening whose upper part is open, and the transformer is housed inside.
The load switch or circuit breaker is fixed to the inside of the upper box body.
The box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and the lower front panel on the front side of the lower box body than the front side portion of the upper box body. There retracted, the front side key Yubikuru formula power receiving and transforming equipment cabinet space size capable of accommodating the high-pressure cabinet is provided in the lower portion front panel. The box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and the lower front panel on the front side of the lower box body than the front side portion of the upper box body. The cubicle-type power receiving and transforming equipment according to claim 1, wherein a cabinet space having a size capable of accommodating a high-voltage cabinet is provided on the front side of the lower front panel. The box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and the lower front panel on the front side of the lower box body than the front door of the upper box body. When the lower box body is fixed to a base pedestal having a cabinet pedestal portion to which the high pressure cabinet is fixed, a cabinet space having a size capable of accommodating the high pressure cabinet is provided in the upper box body. The cubicle-type power receiving / transforming facility according to claim 1, which is provided on the lower side of the bottom portion, on the upper side of the cabinet pedestal portion, and on the front side of the lower front panel. The box body has a depth difference structure in which the depth of the lower box body is smaller than the depth of the upper box body, and a vertical communication structure in which the upper box body and the lower box body communicate with each other through the opening. The load switch or circuit breaker and the instrument transformer are housed together with the transformer.
In the upper box body, a VCT pedestal to which the instrument transformer is fixed is formed in the opening, and the instrument transformer is fixed to the VCT pedestal.
The lower box body has a lower front panel arranged on the front side, and a cabinet space corresponding to the external dimensions of the high-pressure cabinet is provided on the front side of the lower front panel and on the lower side of the bottom portion . The cubicle according to claim 1 , wherein a cabinet pedestal portion to which the high-voltage cabinet is fixed is arranged on the front side of the lower front panel facing the cabinet space, and the transformer is housed on the back side of the cabinet space. Type power receiving and transforming equipment. The cubicle-type power receiving / transforming facility according to claim 4 or 5, which has a cabinet built-in structure in which the high-voltage cabinet is incorporated by fixing the high-voltage cabinet to the cabinet pedestal portion. 5. Claim 5 in which a lower side door is formed on the side surface of the lower box body, and an upper side door having a size corresponding to the VCT pedestal is arranged at a position corresponding to the VCT pedestal on the side surface of the upper box body. The cubicle type power receiving and transforming equipment described. Any of claims 1 to 7, which has an equipment compartmentalized accommodation structure in which the transformer and the low-voltage equipment are housed in the lower box body, and the high-voltage equipment including the load switch or the circuit breaker is housed in the upper box body. The cubicle type power receiving and transforming equipment described in item 1. A cubicle that constitutes a cubicle-type power receiving / transforming facility that houses at least a load switch or circuit breaker and a transformer.
The cubicle has a two-layer structure in which the upper box body is overlapped on the lower box body and the lower box body and the upper box body are detachable.
The lower box body is formed as an opening whose upper part is open, and a transformer pedestal to which the transformer is fixed is formed inside.
The upper box body is a cubicle having a partially bottomed structure having a front door provided on the front side and a bottom portion arranged on the front side and an opening arranged on the back side of the bottom portion.

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