JP7443458B2 - Panel replacement type power supply system, panel update method for power supply system, and short circuit panel - Google Patents

Description

Embodiments of the present invention relate to a panel replacement type power supply system, a panel updating method for a power supply system, and a short circuit panel.

An uninterruptible power supply system (UPS) is a system that supplies power of the same standard to a load for a predetermined period of time even if a power supply trouble occurs. An uninterruptible power supply system usually includes a UPS panel and peripheral panels, and is installed in a data center or the like. The UPS panel is a main part of the uninterruptible power supply system, and includes power equipment such as a converter that converts alternating current to direct current and an inverter that converts direct current to alternating current. Peripheral panels include input transformer panels, storage battery panels, and the like.

The UPS panel and peripheral panels are generally housed in a substantially rectangular parallelepiped-shaped housing. These cases are often arranged in a line along the wall of an electrical room or the like. Furthermore, the depth and height dimensions of the UPS panel casing and the peripheral panel casings are unified from the viewpoint of aesthetics. The size of these casings is, for example, a depth of about 1000 mm, a height of about 1900 mm when the capacity is 500 kVA, and about 2300 mm when the capacity is 1000 kVA.

A housing such as a UPS panel has a door attached to the front, and the door is opened to perform maintenance and inspection of the inside of the UPS panel or the surrounding panels. Therefore, a work space is provided in front of the UPS panel and peripheral panels. Additionally, the UPS board and peripheral boards are updated at the end of their respective expected lifespans. Updating panels such as the UPS panel and peripheral panels means replacing the entire casing of the existing panel with a new panel.

The expected life spans of the UPS panel and peripheral panels are different, and the timing of replacement work for the UPS panel and replacement work for the peripheral panels will be significantly different. Specifically, the expected lifespan of a UPS panel is about 15 years, and the UPS panel is to be replaced 15 years after delivery of the uninterruptible power supply system. On the other hand, the expected lifespan of peripheral panels is about 25 years, which is about 10 years later than the time to replace the UPS panel.

JP2014-222982A

As mentioned above, the UPS panel must be replaced 10 years earlier than the surrounding panels. Therefore, when replacing the UPS panel, the connection between the UPS panel and the peripheral panels is removed, but the peripheral panels themselves remain installed. Therefore, when replacing a UPS panel, it is necessary to remove only the UPS panel to be replaced from the fixed installation location out of a group of multiple housings lined up, and install a new UPS panel in the same location. Become.

When performing such update work, considering the original role of the UPS, it is preferable to continue power supply, that is, the supply of electric power. To deal with this, it is conceivable to separately prepare a UPS main body for supplying UPS power to the load only during update work. However, if a UPS main body is prepared to be used only during update work, the work cost will be extremely high and the economic burden will be heavy.

Furthermore, data centers where UPS units are installed do not always have ample space. For this reason, it is difficult to secure a space to install the UPS main body, which is used only during update work.

Furthermore, considering the role of the UPS, which is the continuous supply of power, the shorter the period for replacing the UPS itself, the better. However, the power equipment of the UPS panel and the peripheral panels are electrically connected via cables, and the connection portion is provided inside the UPS panel. For this reason, when only the UPS panel is removed from the installation location, the work of disconnecting the connection portions with a plurality of cables must be performed inside the UPS panel, which is very time consuming. Furthermore, when installing a new UPS panel, wiring work for a plurality of cables must be performed inside the UPS panel, which is cumbersome and can easily lead to connection errors.

As described above, if it takes time and effort to separate the wires and connect the connected parts, the renewal cost will increase. Furthermore, in the case of UPS, the longer the construction period, the lower the safety against power outages. In order to deal with this, it is necessary to concentrate a large number of workers on the replacement work of the UPS main body, which increases labor costs and further increases the cost of updating the UPS main body.

This embodiment was proposed to solve the above problem, and its purpose is to easily and quickly update the panel while continuing to supply power even in a small space. It is an object of the present invention to provide a panel replacement type power supply system that can be performed at low cost, a panel renewal method for the power supply system, and a short circuit panel.

In order to achieve the above object, the panel-replaceable power supply system according to the embodiment of the present invention includes a plurality of power supply paths and a case-side connection section provided in each supply path and supported by a panel having a case. , a path-side connection section for opening and closing an electrical connection, and an area where the casing is installed, and a part of the casing-side connection section of the casing installed in the area and the At least one of the path-side connecting portions has an installation area in which electrical connection can be opened and closed by moving relative to the other.

Further, in the method for updating a panel of a power supply system according to an embodiment, power is supplied in parallel to a shorting panel that is connected to at least one supply route and is housed in the housing, and a shorting member that short-circuits the divided supply route. Among the UPS panels connected to at least two supply routes, any one of the existing UPS panels is replaced, and while the existing UPS panel replaced with the short circuit board continues to supply power, the supply route is The existing UPS panel is removed from at least one other supply route, a new UPS panel is connected, the existing UPS panel replaced with the shorting panel is removed, and the shorting panel is restored.

It is a perspective view of the board of an embodiment. It is a front view of the board of an embodiment. 1 is a circuit diagram of an uninterruptible power supply system including an embodiment. It is a perspective view of the connection part of embodiment. It is a side view (A) and a top view (B) which show a connecting part and a route side connecting part in a disconnection position. It is a side view (A) and a top view (B) which show a connection part and a route side connection part in a closed position. FIG. 1 is a circuit diagram of a power supply system according to a first embodiment. It is a flowchart which shows the update procedure of the regularly used UPS panel of 1st Embodiment. 2 is a flowchart showing a procedure for updating a spare UPS board according to the first embodiment. FIG. 3 is a plan view showing preparation for pulling out the heavy board of the embodiment from the installation position. FIG. 3 is a plan view showing the weight panel of the embodiment in the middle of being pulled out from the installation position. FIG. 3 is a plan view showing the weight board of the embodiment just before completion of being pulled out from the installation position. It is a top view which shows the carrying-out state of the heavy board of embodiment. It is a top view which shows the carrying-in state of the heavy board of embodiment. It is a top view which shows positioning to the installation position of the heavy board of embodiment. It is a top view which shows insertion into the installation position of the heavy board of embodiment. FIG. 2 is a circuit diagram of a power supply system according to a second embodiment. It is a flowchart which shows the update procedure of the UPS panel of 2nd Embodiment. FIG. 3 is a circuit diagram of a power supply system according to a third embodiment. It is a flowchart which shows the update procedure of the UPS panel of 3rd Embodiment. FIG. 3 is a circuit diagram of a power supply system according to a fourth embodiment. It is a flowchart which shows the update procedure of the UPS panel of 4th Embodiment. It is a flowchart which shows the return procedure of the short circuit board of 4th Embodiment. 12 is a flowchart showing a procedure for updating UPS panels for the number of parallel UPS panels according to the fourth embodiment. FIG. 3 is a front view showing an example in which the embodiment is applied to a peripheral board. It is a front view which shows the modification of a connection part. It is a perspective view which shows the modification in which the connection part was provided on the side surface. 17 is a front view of a modification of FIG. 16. FIG.

[First embodiment]
A panel exchange type power supply system according to a first embodiment will be described. First, a board applied to this embodiment will be explained with reference to the drawings. The panel to be updated in this embodiment is a UPS panel applied to an uninterruptible power supply system (hereinafter referred to as UPS).
[UPS board]
As shown in the perspective view of FIG. 1 and the front view of FIG. 2, the UPS panel has a main body part 1 and a housing side connection part 11. The main body part 1 has a casing 10 in which a power device is housed, and is installed in an upright direction on an installation surface. The UPS panel of this embodiment is a heavy panel that is difficult to install by a worker alone, and is also called a heavy panel. This weight is, for example, about 100 kg to 3000 kg. Note that the heavy board can also be called a "power board."

The housing 10 is a substantially rectangular parallelepiped-shaped container. The casing 10 is installed in the installation area F on the installation surface by moving it in the depth direction as indicated by the thick white arrow in the figure. The installation area F is a surface or space where the housing 10 is installed. That is, it may be either a surface on which the casing 10 is placed or a space in which the casing 10 is accommodated. Further, the housing 10 may or may not be in direct contact with a floor, a wall surface, a pillar, a surface such as another adjacent panel, or an object constituting a space. For example, a base portion BS, which will be described later, may be interposed between the bottom surface of the housing 10 and the floor surface. A spacer or the like may be interposed between adjacent walls, pillars, or boards.

The installation area F in this embodiment is a horizontal floor surface. The horizontal surface of the casing 10 installed in the installation area F on the opposite side to the installation area F is defined as the upper surface 10a. Among the four vertical surfaces of the casing 10, one of the surfaces is a front surface 10b, the opposite surface is a back surface 10c, and the other two surfaces are side surfaces 10d and 10e. In FIGS. 1 and 2, the front side is the front side. The casing 10 has doors installed on the front, which can be opened to perform internal maintenance and inspection. Further, the depth direction is the thickness direction between the front surface 10b and the back surface 10c.

The power equipment housed in the casing 10 is a device that performs its functions in response to a supply of electric power. Power equipment includes equipment that constitutes part of a power receiving and transforming system or a power supply and distribution system. For example, devices constituting a UPS, switching devices that open and close electrical circuits such as circuit breakers and disconnectors, transformers, protective relays, and the like are included in power equipment. Furthermore, equipment for monitoring equipment, such as PLCs, relays, arresters, hubs, timers, etc., are also included in power equipment. Power equipment also includes terminal boards and circuit boards that have electrical contacts. Furthermore, power consuming devices such as air conditioners, computers, and display devices are also included in power devices.

The power equipment housed in the casing 10 of the UPS panel of this embodiment is equipment that constitutes a part of the UPS. As will be described later, the UPS can be applied to both a regular standby uninterruptible power supply system and a parallel redundant uninterruptible power supply system.

First, the power devices housed in the housing 10 in this embodiment are a converter 2, an inverter 3, and an AC switch 4, as shown in FIG. Converter 2 is a device that converts alternating current to direct current. The inverter 3 is a device that converts direct current to alternating current. The converter 2 and the inverter 3 are connected to a main path R1 from input to output of alternating current during steady state. The AC switch 4 is a device that opens and closes a bypass path R2 that does not go through the converter 2 and inverter 3. The bypass route R2 is a route that directly transmits AC power from an AC input to an output during maintenance inspection or failure. Furthermore, a charging/discharging path R3 is connected to the main path R1 between the converter 2 and the inverter 3 as a branch.

The input side of the main path R1 and the input side of the bypass path R2 are connected to the transformer of the input transformer board 6. The input transformer board 6 is a board that accommodates a step-down transformer connected to a commercial power source. The charging/discharging route R3 is connected to the storage battery of the storage battery panel 7. The storage battery board 7 is a board that houses storage batteries that serve as a power source during a power outage. The output sides of the main path R1 and the bypass path R2 are connected to the branch board 8. The branch board 8 is a board connected to connected devices that consume power. Hereinafter, the input transformer board 6, the storage battery board 7, the branch board 8, etc. will be referred to as peripheral boards. Although not shown, the peripheral board is installed in an electrical room or the like in which the main body 1 is housed. It may be installed at a position adjacent to the housing 10 of the main body part 1.

As shown in FIGS. 1 and 2, the case-side connection section 11 is provided at a position corresponding to the path-side connection section 21 provided outside the case 10. When the casing 10 is installed in the installation area F, the casing side connection part 11 comes to a position facing the path side connection part 21. At this time, as will be described later, the electrical connection portion between the housing-side connection portion 11 and the path-side connection portion 21 comes to a position where they can be joined. However, if the casing 10 is simply pushed in and installed in the installation area F, the electrical connection between the casing-side connection part 11 and the path-side connection part 21 is released.

At least one of the part of the housing-side connection part 11 and the part of the path-side connection part 21 moves relative to the other, thereby making it possible to open and close the electrical connection. In other words, although the case-side connection part 11 is supported by the case 10 and the path-side connection part 21 is supported at a predetermined mounting location, at least one of the conductor parts that are a part of each is connected to and separated from the other. By moving in the direction, it is possible to open and close electrical connections. The conductor portion may be moved in either one of the case-side connecting portion 11 and the path-side connecting portion 21, or both. Note that this movement is guided in a specific direction by a guide section, etc., which will be described later, and is different from movement with a high degree of freedom, such as holding the end of a flexible conductor with your hand and connecting it to a terminal. .

The case-side connection part 11 of this embodiment is supported outwardly from the outer periphery when viewed from the front side of the case 10 when the main body part 1 is installed on the installation surface, and connects the power equipment and the outside with electricity. Connect to The outer peripheral edge is a frame along the outer surfaces of the top surface 10a and both side surfaces 10d and 10e. Supporting outward from the outer periphery when viewed from the front side means that the part where the housing-side connection part 11 is supported is not hidden behind the back surface and protrudes outward from the top surface 10a and both side surfaces 10d and 10e. Say something. It is preferable for the electrical connection portion to be located outward from the outer periphery so that the operator can check, grasp, and operate from the front side. However, a part of the casing-side connection part 11 and a part of the electrical connection part may be hidden on the back side of the casing 10.

In the case side connection part 11, some conductor parts are movable depending on the position of the path side connection part 21 fixed to equipment outside the case 10 when the main body part 1 is installed on the installation surface. This is the movable side connection section provided. As shown in FIG. 3, a plurality of case-side connection sections 11 of this embodiment are provided, and are respectively provided on the input side of the main path R1, the input side of the bypass path R2, the charging/discharging path R3, and the outputs of the main path R1 and the bypass path R2. connected to the side. In addition, since the case side connection part 11 is supported in the above position, the electrical connection part of the case side connection part 11 with the route side connection part 21 can be easily accessed by the worker from the front side of the case 10. Easy to see and understand.

The path-side connection section 21 is a component fixed to equipment outside the casing 10. The external equipment here refers to equipment that constitutes the location where the casing 10 is installed or equipment installed at this location. The equipment of this embodiment is equipment that constitutes an electrical room, equipment installed in the electrical room, and includes a wall surface of the electrical room, a panel installed in the electrical room, a frame surrounding the casing 10, and the like. For example, the path-side connection section 21 may be housed in a separate housing from the housing 10, such as an external line terminal board to be described later, and may also be housed in a board adjacent to the top, left and right sides of the housing 10, etc. .

The path-side connection section 21 is electrically connected to the peripheral board via a cable C. For example, the cable C from the input transformer board 6, the storage battery board 7, and the branch board 8 is extended through a bus duct or the like and connected to the path-side connection part 21. As shown in FIG. 3, a plurality of path-side connection sections 21 are provided corresponding to the case-side connection sections 11, and by connecting the case-side connection sections 11 to the path-side connection sections 21, the main path R1 An input transformer board 6 is connected to the input side of the bypass route R2, a storage battery board 7 is connected to the charging/discharging route R3, and a branch board 8 is connected to the output sides of the main route R1 and the bypass route R2.

Further, the electrical connection portion E (see FIGS. 5 and 6) of the housing side connecting portion 11 with the path side connecting portion 21 is connected to the path side connecting portion 21 when the housing 10 is installed on the installation surface. It is provided so as to be movable between a separated disconnection position and a closed circuit position where it is electrically connected to the path-side connection section 21 . Furthermore, a plurality of housing-side connecting portions 11 are provided for each phase of alternating current. Furthermore, a plurality of housing-side connecting portions 11 are provided for alternating current and direct current.

The housing side connection portion 11 has a conductor 11a, as shown in FIGS. 4 to 6. Although not shown, the conductor 11a is connected to power equipment via a flexible cable or the like. The conductor 11a includes a pair of flat plates parallel to the depth direction of the housing 10.

Hereinafter, more specific configurations of the case-side connection section 11 and the path-side connection section 21 will be explained.
(Case side connection part)
The housing-side connection portion 11 is supported by the support portion 101 . As shown in FIGS. 1 and 2, the support portion 101 is a plate-shaped member provided on the upper surface 10a of the housing 10 and fixed in a direction parallel to the front surface 10b. Therefore, the housing-side connection portion 11 is supported by the upper surface 10a of the housing 10.

The case-side connection section 11 supported by the support section 101 has a guide section 111, a movable section 112, and an operation section 113. The guide portion 111 is a member that guides the movement of the conductor 11a in order to adjust the position of the conductor 11a with respect to the path-side connection portion 21. The guide section 111 includes a guide rail 111a and a slider 111b. The guide rail 111a is an elongated member having a substantially U-shaped cross section with an opening on the back side of the housing 10. The guide rail 111a is attached in the width direction of the housing 10, that is, in the horizontal direction. The slider 111b is a rectangular tube-shaped elongated member inserted into the guide rail 111a, and slides in the width direction of the housing 10 along the guide rail 111a.

The movable part 112 is a member that moves while supporting the conductor 11a. The movable part 112 has a moving plate 112a and a support plate 112b. The moving plate 112a is a flat plate that is attached to the slider 111b and moves in the width direction of the housing 10 together with the slider 111b. The support plates 112b are a pair of flat plates that protrude in parallel in the depth direction, and are attached to the back side of the movable plate 112a. The support plate 112b has a guide groove 112c in the depth direction. The pair of conductors 11a are each movably supported along the guide grooves 112c of the support plate 112b.

Therefore, the conductor 11a is movable in the width direction of the housing 10 together with the slider 111b that moves along the guide rail 111a. Further, the conductor 11a has a slide portion 11c which is a protruding portion inserted into a linear guide groove 112c which is a guide portion different from the guide portion 111. Therefore, the conductor 11a is movable in the depth direction of the housing 10 along the guide groove 112c. Since the cable connected to the conductor 11a is flexible, even if such movement occurs, continuity with the cable is ensured. That is, the housing-side connecting portion 11 includes a conductor 11a that is movable in a linear direction by being guided by a guide portion (guide groove 112c). By moving the conductor 11a in the linear direction, it becomes possible to open and close the electrical connection with the path-side connecting portion 21.

The operating unit 113 is a member for manually operating the position of the conductor 11a. The operating section 113 has a biasing plate 113a and a handle 113b. The biasing plate 113a is parallel to the front surface of the housing 10 and has a rectangular shape that is long in the width direction. A substantially U-shaped connecting portion 11b connecting the pair of conductors 11a is attached to the biasing plate 113a. That is, the connecting part 11b attached to the conductor 11a provided on the back side of the support part 101 passes through the hole 101a formed in the support part 101, and the connecting part 11b is attached to the biasing plate provided on the front side of the support part 101. 113a while ensuring insulation. The biasing plate 113a is made of a transparent material so that the inserted state of the conductor 11a can be visually confirmed. The handle 113b is a substantially U-shaped rod member. Both ends of the handle 113b are fixed to the front surface of the biasing plate 113a so that the longitudinal direction thereof corresponds to the width direction of the housing 10.

(Route side connection part)
The path-side connection section 21 is a member that electrically connects to the cable C via the case-side connection section 11. The path-side connecting portion 21 includes a fixing plate 211, a terminal plate 212, and a connector portion 213.

The fixed plate 211 is a rectangular plate fixed to equipment outside the housing 10. The terminal plate 212 is a conductive plate fixed to the fixed plate 211. The upper end of the terminal plate 212 serves as an end for connection to a terminal of the cable C. For example, although not shown, connection holes are formed.

The connector portion 213 is a member into which the conductor 11a is inserted and removed. In other words, the conductor 11a and the connector part 213 constitute a fitting part in which the conductor 11a moves from the housing side connection part 11 toward the path side connection part 21 and fits into each other, thereby being electrically connected. . The connector portion 213 has a recess 213a and a contact electrode 213b. The recess 213a is a hollow-shaped portion into which the conductor 11a is inserted. The contact electrode 213b is a member provided in the recess 213a and electrically connected to the terminal plate 212.

A plurality of such connector parts 213 are arranged with respect to the conductor 11a. In this embodiment, three connector parts 213 are provided. The contact electrodes 213b of this connector portion 213 share the rated current equally. For example, when the rated current is 300A, a current of about 100A can be passed. However, it is also possible to use a single connector portion 213 that carries the rated current. Note that a member that moves for electrical connection can be provided on one or both of the housing-side connection section 11 and the path-side connection section 21. For example, a connector portion may be provided in the case-side connection portion 11, and a moving conductor may be provided in the path-side connection portion 21. Further, both the connector portion and the conductor may be provided movably in the connection direction.

As shown in FIGS. 1 and 2, a plurality of sets of the above-mentioned case-side connection section 11 and path-side connection section 21 are prepared, divided into sections for input and output. For example, the housing side connection section 11 and the path side connection section 21 are provided separately for an AC input AN, a DC input DN, a bypass input BN, and an AC output AO. These housing-side connecting portions 11 are arranged at intervals from each other to ensure an insulating distance. Further, the path-side connecting portions 21 are also arranged side by side at positions corresponding to the case-side connecting portions 11 with an interval between them to ensure an insulating distance. Furthermore, by dividing the housing-side connecting portion 11 and the path-side connecting portion 21 into a plurality of groups in this way, the insertion/extraction load of the fitting portion is reduced.

[Replaceable power supply system]
FIG. 7 is a circuit diagram of the panel exchange type power supply system of this embodiment. The panel exchange type power supply system of this embodiment is configured as a regular standby uninterruptible power supply system. Further, FIG. 7 shows a mode in which UPS panels B1 and Bx are connected to power supply paths PS1 and PSx between the power supply CS of the commercial system and the load L as an electric circuit, and FIG. The storage battery board 7 and the branch board 8 shown in are omitted from illustration. In addition, in the following description, when the supply routes PS1 and PSx are not distinguished, they are simply referred to as the supply route PS, and when the UPS panels B1 and Bx are not distinguished, they are sometimes simply referred to as the UPS panel B.

That is, the panel exchange type power supply system of this embodiment has two power supply paths PS1 and PSx. The supply paths PS1 and PSx include cables and the like, and are connected to AC power sources CS1 and CSx such as commercial systems, respectively, and can receive AC power supply. The supply paths PS1 and PSx are connected in parallel to the load L via the parallel connection part PC. The load L is equipment that converts or consumes supplied power to perform various tasks. The parallel connection part PC is constituted by a cable or the like. The parallel connection unit PC may be housed in the casing of the peripheral board.

The supply paths PS1 and PSx are provided with the path-side connection portion 21 as described above, and an installation area F is provided near the path-side connection portion 21. The main bodies 1 of the UPS panels B1 and Bx as described above are installed in the installation areas F corresponding to the supply routes PS1 and PSx, respectively, and the main bodies 1 of the UPS panels B1 and Bx as described above are installed in the installation areas F corresponding to the supply routes PS1 and PSx, respectively. Power equipment housed in the body 10 is connected. This connection is performed in two steps: installing the casing 10 in the installation area F, and connecting the casing-side connection section 11 and the path-side connection section 21. Note that the installation area F is illustrated for convenience in application to the circuit diagram, and its size and shape are not specified.

The UPS panel B1 of the supply path PS1 is a regularly used panel that converts alternating current supplied from the power source CS1 into direct current and supplies it to the load L during normal times. The UPS board Bx of the supply path PSx is a spare board that converts the alternating current supplied from the power supply CSx into direct current and supplies it to the load L when supply to the load L from the supply path PS1 is not possible.

The switching unit selectively switches the power supply source to the load L to one of the UPS panels B1 and Bx of the two supply paths PS1 and PSx, thereby controlling the power output from the selected UPS panel B1 or UPS panel Bx. While continuing the supply of UPS board B1 or Bx, any other UPS board B1 or Bx can be replaced.

The switching section includes a plurality of circuit breakers 52C, 52R, 52RC, 52MC, 52M, and 52L. In the following description, when a plurality of circuit breakers are not distinguished, they may be simply referred to as circuit breaker 52. The circuit breaker 52 is opened or closed in response to a signal from a relay, a manual operation at the site, a program of a control device such as a computer, a remote operation according to an input from an input unit, or the like.

The circuit breakers 52C and 52R open and close connections between the power supplies CSx and CS1 and the supply paths PSx and PS1. The circuit breaker 52RC opens and closes the connection between the power supply CSx and the UPS panel Bx. The circuit breaker 52MC opens and closes the connection between the UPS panel Bx and the parallel connection part PC. The circuit breaker 52M opens and closes the connection between the parallel connection part PC and the UPS panel B1. The UPS panel Bx of the supply path PSx is always in a state where it can receive power from the power supply CSx and supply power to the load L. However, the UPS panel Bx is in a hot standby state where the circuit breaker 52M (or circuit breaker 52MC) is open and on standby. The circuit breaker 52L opens and closes the connection between the UPS panel B1 and the load L.

The circuit breaker 52R is housed in the casing of the input panel I1 (input transformer panel 6). The circuit breaker 52C is housed in the casing of the input panel Ix (input transformer panel 6). The circuit breaker 52MC is housed in the casing of the external line terminal board Ox. The circuit breakers 52RC, 52M, and 52L are housed in the casing of the external line terminal board O1. The external line terminal board Ox, O1 is a board in which the path-side connection section 21 is housed in a housing. In the following description, if the input board is not distinguished, it will simply be referred to as the input board I, and if the external line terminal board is not distinguished, it may be referred to as the external line terminal board O.

[Update work]
The updating work of the panel replacement type power supply system as described above will be explained with reference to the flowcharts of FIGS. 8 and 9. The update work of this embodiment is to remove the existing UPS panel B from one other supply route PS while continuing to supply power through one supply route PS. In other words, while the UPS board B1 or Bx connected to one of the plurality of supply routes PS1 and PSx continues to supply power, the UPS board from the other supply route PS1 or PSx Remove panel B1 or Bx. Then, connect the newly installed UPS panel in place of the removed UPS panel B1 or Bx.

(Update of regular UPS board)
The work of updating the regularly used UPS panel B1 will be explained with reference to FIG. Note that during normal operation, the circuit breakers 52R, 52RC, and 52L are closed, and power is supplied to the load L by the UPS panel B1. Further, it is assumed that the circuit breakers 52C and 52MC are closed, but the circuit breaker 52M is open, so the UPS panel Bx continues to operate without load and is on standby.

That is, the circuit breaker 52M is turned on and overlap switching with the circuit breaker 52L is performed (step S101). Overlap switching is a switching method in which one circuit breaker is closed before one circuit breaker is opened, the other circuit breaker is closed, and then one circuit breaker is opened at a timing when the phases of a plurality of power supplies are matched. In this embodiment, at the timing when the phases of the UPS panel B1 and the UPS panel Bx match, before the circuit breaker 52L is opened, the circuit breaker 52M is closed, and then the circuit breaker 52L is opened. As a result, the power supply source for the load L is switched from "UPS panel B1 only" to "UPS panel B1 and UPS panel Bx" to "UPS panel Bx only," but the supply of power does not stop.

Next, the circuit breakers 52RC and 52R are opened to stop the existing UPS panel B1 (step S102). Then, the connection between the case side connection part 11 and the path side connection part 21 of the existing UPS panel B1 is released, and the existing UPS board B1 is removed from the installation area F (step S103). The work of releasing the connection between the case-side connection part 11 and the path-side connection part 21 and the work of removing the UPS panel B1 will be described later.

A new UPS panel B1 is installed in the installation area F from which the existing UPS panel B1 was removed, and the connection between the housing side connection section 11 and the route side connection section 21 is performed (step S104). The installation work of the newly installed UPS panel B1 and the connection work between the housing-side connection section 11 and the path-side connection section 21 will be described later.

Then, the circuit breakers 52R and 52RC are turned on, and a unit test of the newly installed UPS panel B1 is performed (step S105). Further, the circuit breaker 52L is turned on, and overlap switching with the circuit breaker 52M is performed (step S106). That is, at the timing when the phases of the newly installed UPS panel B1 and the UPS panel Bx match, and before the circuit breaker 52M is opened, the circuit breaker 52L is closed, and then the circuit breaker 52M is opened. As a result, the power supply source for load L switches from "UPS panel Bx only" to "UPS panel Bx and newly installed UPS panel B1" to "newly installed UPS panel B1 only," but the power supply does not stop. .

(Update of spare UPS board)
Next, the update work for the spare UPS board Bx will be explained according to FIG. 9. First, the circuit breakers 52C and 52MC are opened to stop the existing UPS panel Bx (step S201). Then, the connection between the case side connection part 11 and the path side connection part 21 of the existing UPS panel Bx is released and removed from the installation area F (step S202).

A new UPS panel Bx is installed in the installation area F from which the existing UPS panel Bx was removed, and the connection between the housing side connection section 11 and the path side connection section 21 is performed (step S203). Then, the circuit breakers 52C and 52MC are turned on, and a unit test of the newly installed UPS panel Bx is performed (step S204). Thereafter, the UPS panel Bx continues to operate without load and stands by.

[Electrical connection work]
Next, the electrical connection work and disconnection work between the case side connection part 11 and the path side connection part 21 as described above will be explained. It should be noted that, prior to the electrical connection work and the disconnection work, the work of releasing the charged part using a circuit breaker or the like to ensure safety is as described above, so a description thereof will be omitted. As shown in FIGS. 4, 5(A), and 5(B), when the main body 1 is installed in the installation area F, the conductor 11a and the recess 213a of the connector 213 are separated from each other and face each other. In other words, at this time, the case side connection part 11 is in the disconnection position.

The operator holds the handle 113b of the operation part 113 and moves it in the width direction, as shown in FIG. After adjusting, push the biasing plate 113a toward the back side as shown in FIG. 5(A). Then, as shown in FIGS. 6(A) and 6(B), the connecting portion E of the conductor 11a moves linearly in the depth direction, fits into the recess 213a of the connector portion 213, and contacts the contact electrode 213b. electrically connected. As a result, the case-side connection part 11 becomes the closed circuit position, and the cable C is connected to the power equipment inside the case 10 via the case-side connection part 11 and the path-side connection part 21. Through the connection to the cable C, the peripheral board and the power equipment inside the casing 10 are connected.

[Electrical disconnection work]
To release the connection between the housing side connection part 11 and the route side connection part 21, as shown in FIGS. 6(A) and 6(B), hold the handle 113b of the operation part 113 and pull it toward the front side. Then, the conductor 11a comes off from the recess 213a of the connector portion 213, and the electrical connection with the contact electrode 213b is released. As a result, the case-side connection portion 11 is placed in the disconnection position, as shown in FIGS. 5(A) and 5(B).

[Main unit replacement work]
Next, the work of replacing the main body part 1 will be explained.

(Carrying out the main unit)
The work of carrying out the main body 1 will be explained with reference to FIGS. 10 to 13. Note that the base portion BS is placed in the installation area F. The base part BS is a rectangular frame-shaped plate that is interposed between the main body part 1 and the installation surface and supports the main body part 1. Note that being installed on the installation surface includes both cases where the housing 10 is installed in direct contact with the installation surface and cases where the housing 10 is installed via a member such as the base portion BS.

First, as shown in FIG. 10, the worker installs two parallel rail sections M1 in front of the installation area F where the casing 10 is installed. An eye bolt M2 is attached to a mounting hole (not shown) on the front of the casing 10. Further, an anchor M3 is fixed near the floor of the loading/unloading space S, and a lever block (registered trademark) M4 is attached to the anchor M3. Then, the hook portion of the lever block M4 is hooked onto the eye bolt M2 attached to the mounting hole, and the lever block M4 is operated to pull out the housing 10 from the installation area F.

As shown in FIG. 11, when a mounting hole (not shown) on the side surface of the housing 10 is exposed by pulling out the housing 10, the operation of pulling out the housing 10 is temporarily stopped. Then, remove the hook portion of the lever block M4 from the eye bolt M2 in the front mounting hole, and attach the eye bolt M2 to the side mounting hole. By hooking the hook portion of the lever block M4 onto this eye bolt M2 and operating the lever block M4, the housing 10 is further pulled out.

As shown in FIG. 12, when the housing 10 is further pulled out and a mounting hole near the rear side of the side surface of the housing 10 appears, the pulling operation is temporarily stopped. Then, remove the hook portion of the lever block M4 from the eye bolt M2, and attach the eye bolt M2 to the mounting hole near the back. By hooking the hook portion of the lever block M4 onto this eye bolt M2 and operating the lever block M4, the housing 10 is further pulled out. As a result, the casing 10 is completely lowered from the base portion BS, and the entire casing 10 is pulled out to the loading/unloading space S.

As shown in FIG. 13, the casing 10 pulled out into the loading/unloading space S is lifted with a jack or the like, and the hand lift M5 is inserted therein. Finally, the worker H uses the hand lift M5 to carry the casing 10 outside through the carrying-in/out space S, and the carrying-out work of the main body 1 is completed.

(Transportation of the main body)
Next, the work of transporting the main body 1 will be explained with reference to FIGS. 14 to 16. As shown in FIG. 14, a plurality of workers H use a hand lift M5 to carry the casing 10 of the main body 1 to the front of the installation area F.

As shown in FIG. 15, four square timbers M6 are installed in front of the front of the casing 10, and the casing 10 is lifted with a jack or the like, the hand lift M5 is pulled out from under the casing 10, and the square timbers M6 are placed on top of the square timbers M6. I'll put it on. Then, two parallel rails M1 are arranged between the square members M6, and the casing 10 is placed on the rails M1.

As shown in FIG. 16, the eye bolt M2 is attached to an attachment hole (not shown) on the side surface of the housing 10. Further, an anchor M3 is fixed near the floor of the loading/unloading space S, and a lever block M4 is attached to the anchor M3. Then, the hook part of the lever block M4 is hooked onto the eye bolt M2 attached to the mounting hole, and the housing 10 is pushed into the installation area F by operating the lever block M4. When almost the entire housing 10 is placed on the base part BS, the hook part of the lever block M4 is removed from the eye bolt M2, the eye bolt M2 is removed from the mounting hole, and the housing 10 is pushed into the main body. The loading work of step 1 is completed.

[Effect]
In the panel-replaceable power supply system of this embodiment as described above, there is a connection between a plurality of power supply paths PS and the case-side connection section 11 provided in each supply path PS and supported by a panel having the case 10. A region in which a path-side connection section 21 that opens and closes electrical connection and the casing 10 are installed, and a part of the casing-side connection section 11 of the casing 10 installed in the area and the path side At least one of the connecting parts 21 has an installation area F in which electrical connection can be opened and closed by moving relative to the other.

Therefore, by utilizing the installation area F where the existing panel is installed, the panel update process can be carried out while continuing to supply power even in a small space without having to prepare a new panel for the update. It can be performed. Moreover, the removal of the existing panel can be done in two steps: disconnecting the electrical connection between the casing-side connection part 11 and the path-side connection part 21, and removing the casing 10 from the installation area F. Furthermore, installation of a new panel can be accomplished in two steps: installing the casing 10 and then electrically connecting the casing-side connection section 11 and the path-side connection section 21. Therefore, disconnection of a plurality of cables and wiring work do not take much time, and the panel updating work can be performed easily, in a short period of time, and at low cost. This helps prevent human errors in wiring work. Additionally, since the update work is short, the risk of power outages can be reduced.

The above effects are even more effective when the board to be replaced is a heavy board as in this embodiment. In other words, since moving each heavy panel one by one requires a lot of effort as mentioned above, electrical connection work can be simplified, making the overall update work easier and reducing work time. , it is possible to realize cost reduction. This also applies to large systems where three or more boards need to be replaced. Furthermore, the switching unit (breaker 52) that releases charging of the supply route PS is located in a location that cannot be visually confirmed by the update worker, such as in a separate enclosure, section, room, or building from the panel to be updated. There are cases. In this case, even if the switching unit is turned on due to an erroneous operation or the like and the update operator is in a charging state that is not intended, the case side connection unit 11 and the route side connection unit 21 will allow Since the supply path PS can be opened and closed, work can be done safely.

Moreover, at least two of the supply paths PS have parallel connection parts PC that connect the UPS panels B in parallel. Then, by selectively switching the power supply source to one of the UPS panels B in the supply route PS, while continuing to supply power from the selected UPS panel B, any other UPS panel B can be switched. It has a switching part that makes it replaceable.

Therefore, the existing UPS panel B can be removed from at least one other supply route while continuing to supply power by the UPS panel B connected to at least one supply route PS. Moreover, since power can be continuously supplied by UPS panel B rather than directly from the commercial grid, reliability can also be ensured.

[Second embodiment]
[composition]
A panel replacement type power supply system according to a second embodiment will be described. Note that descriptions of the same configurations as in the first embodiment will be omitted. In this embodiment, by selectively switching the power supply source to at least one UPS panel B of at least three supply paths PS, the selected UPS panel B continues to supply power while the other UPS panels It has a switching section that allows any two UPS panels B to be replaced and allows for parallel testing of both. The parallel test is a test to synchronize the power phases of multiple UPS panels B.

FIG. 17 is a circuit diagram of the panel exchange type power supply system of this embodiment. The system shown in FIG. 17 is configured as a parallel redundant uninterruptible power supply system.

That is, the board exchange type power supply system of this embodiment has four power supply paths PS1, PS2, PS3, and PSx. Each supply route PS is the same as in the first embodiment. The supply paths PS1, PS2, and PS3 are connected in parallel to the load L via the parallel connection part PC. Moreover, the supply paths PS1, PS2, and PS3 are connected in parallel via the test connection part TC. The test connection section TC includes a cable and the like.

The UPS panels B1, B2, and B3 of the supply paths PS1, PS2, and PS3 are normally used panels that convert AC supplied from the power supplies CS1, CS2, and CS3 into DC and supply the DC in parallel to the load L. . In this embodiment, although it is possible to supply power to any one of the UPS panels B1, B2, and B3, the power is shared and supplied by the three UPS panels B1, B2, and B3.

The supply path PSx is a spare panel that supplies AC supplied from the power source CSx to the load L when the supply paths PS1, PS2, and PS3 cannot supply the load L. The supply path PSx is connected in parallel to the path from the parallel connection part PC to the load L by the bypass connection part BP.

The switching unit selectively switches the power supply source to the load L to any one of the UPS panels B of the three supply paths PS1, PS2, and PS3, thereby causing the selected UPS panel B to supply power. While continuing, the other two UPS panels B can be replaced and tested in parallel. The switching section includes a plurality of circuit breakers 52C, 52R1, 52R2, 52R3, 52I1, 52I2, 52I3, 52T1, 52T2, 52T3, 52M, and 52L.

The circuit breakers 52C, 52R1, 52R2, and 52R3 open and close connections between the power supplies CSx, CS1, CS2, and CS3 and the supply paths PSx, PS1, PS2, and PS3. The circuit breakers 52I1, I2, and I3 are provided in the parallel connection unit PC, and are parallel switching units that open and close connections between the UPS panels B1, B2, and B3, and the load L. The circuit breakers 52T1, T2, and T3 are provided in the test connection section TC, and are test switching sections that interconnect the UPS panels B1, B2, and B3. The circuit breaker 52M opens and closes the connection between the supply path PSx and the parallel connection part PC. The circuit breaker 52L opens and closes the connection between the parallel connection part PC and the load L.

The circuit breakers 52R1, 52R2, and 52R3 are housed in the housings of the input panels I1, I2, and I3 (input transformer panel 6). The circuit breaker 52C is housed in the casing of the input panel Ix (input transformer panel 6). The circuit breakers 52I1, 52I2, 52I3, 52T1, 52T2, and 52T3 are housed in the housing of the parallel panel PB. The circuit breakers 52L and 52M are housed in the casing of the maintenance bypass board MB.

[Update work]
The updating work of the above-mentioned panel replacement type power supply system will be explained with reference to the flowchart of FIG. 18. Note that the initialization and incrementing of variables in the flowchart may be done virtually by the operator based on his or her own judgment, or may be done by a control device, which is a computer that controls the power supply system, and visually checked by the administrator. It may be displayed on a display device so that it becomes possible. The electrical connection work and the main body replacement work are the same as in the first embodiment.

In the update work of this embodiment, one of the existing UPS panels B connected to the other two supply routes PS is removed while continuing to supply power from the UPS panel B connected to one supply route PS. Afterwards, it will be replaced with a newly installed UPS panel B, and a parallel test will be conducted on both.

In addition, during normal operation, circuit breakers 52R1, 52R2, 52R3, 52I1, 52I2, 52I3, and 52L are turned on, and power is supplied in parallel to load L by UPS panels B1, B2, and B3. shall be.

First, a variable N is initialized to 3, which is the number of parallel connections of UPS panel B, and a counter variable X is initialized to 1 (step S301). The circuit breaker 52I1 is opened and the existing UPS panel B1 is stopped (step S302). The connection between the case side connection part 11 and the path side connection part 21 of the existing UPS panel B1 is released and removed from the installation area F (step S303). At this time, the UPS panels B2 and B3 continue to supply power to the load L.

A new UPS panel B1 is installed in the installation area F from which the existing UPS panel B1 was removed, and the connection between the housing side connection section 11 and the path side connection section 21 is performed (step S304). Then, the circuit breaker 52R1 is turned on and a unit test of the newly installed UPS panel B1 is performed (step S305).

Next, the circuit breaker 52I2 is released, the existing UPS panel B2 is stopped and the parallel operation is canceled, the circuit breakers 52T1 and 52T2 are turned on, and a parallel test is performed between the new UPS panel B1 and the existing UPS panel B2. (Step S306). At this time, it is assumed that power is being supplied to the load L by the UPS panel B3.

At this stage, the counter variable X is not 2 or more (NO in step S307) and does not match the number of parallel connections N (NO in step S309), so the variable X is incremented (step S310). Then, similarly to the above UPS panel B1, the existing UPS panel B2 is stopped, released, and removed, the newly installed UPS 2 is installed and connected, and a unit test and a parallel test are performed (steps S302 to S306). Note that the parallel test here is performed using the newly installed UPS panel B1 and the newly installed UPS panel B2 with the circuit breakers 52T1 and 52T2 turned on.

At this stage, since the counter variable B2 starts supplying power to the load L (step S308). Since the counter variable X has not reached the number N of parallel connections (NO in step S309), the variable X is incremented (step S310). Then, similarly to the UPS panel B2 described above, the existing UPS panel B3 is stopped, released, and removed, the newly installed UPS 3 is installed and connected, and a unit test and a parallel test are performed (steps S302 to S306). Note that the parallel test here is performed using the newly installed UPS panel B1 and the newly installed UPS panel B3 with the circuit breakers 52T1 and 52T3 turned on. At this time, power is being supplied to the load L by the UPS panel B2.

At this stage, since the counter variable The newly installed UPS panel B3 starts supplying power to the load L in parallel with the UPS panel B2 (step S308). Note that by opening the circuit breaker 52T1 and closing the circuit breaker 52I1, the newly installed UPS panel B1 also starts supplying power to the load L in parallel with the newly installed UPS panels B2 and B3.

Then, since the counter variable X has reached the number N of parallel connections (YES in step S309), the update is ended. For example, the control device determines how many panels are connected in parallel (N), how many panels have been updated (X-1), and how many panels have not been updated (N-(X-). 1)) may be displayed on a display device.

As described above, in this embodiment, the power supply source for the load L is "existing UPS panels B1, B2, B3" → "existing UPS panels B2, B3" → "only existing UPS panel B3" → Switches to "Newly installed UPS board B2 and existing UPS board B3" → "Newly installed UPS board B2 only" → "Newly installed UPS board B2 and newly installed UPS board B3" → "Newly installed UPS board B1, B2, B3" However, the power supply will not be interrupted.

[Effect]
In this embodiment as described above, by selectively switching the power supply source to at least one UPS panel B of at least three supply paths PS, the selected UPS panel B continues to supply power. However, it has a switching section that allows one of the other two UPS panels B to be replaced and allows parallel testing of both.

Therefore, by utilizing multiple UPS panels B operated in parallel and their installation area F, power can be continuously supplied even in a small space without preparing a new UPS panel B for updating. UPS board B can be updated at the same time. Even during the update work, it may be possible to share the power by a plurality of UPS panels B operated in parallel, so it is possible to flexibly respond to demand fluctuations of the load L.

[Third embodiment]
[composition]
A panel exchange type power supply system according to the third embodiment will be described with reference to FIG. 19. Note that descriptions of configurations similar to those in the first and second embodiments will be omitted. In this embodiment, one of the supply paths PS includes a short circuit board SB in which a short circuit member SC that short-circuits the divided supply path PS is housed in a case, and a UPS board B1, which is connected to a connection part 11 on the case side and on the path side. Via the connecting part 21, it is provided so that it can be selectively connected.

And, it has a switching unit that allows the UPS panel B of any of the other supply routes PS to be removed while continuing the supply of power by the supply route PS in which the short circuit board SB has been replaced with the newly installed UPS panel B. In this way, the panel exchange type power supply system of this embodiment is configured as a non-redundant single system.

The UPS panel B1 of the supply path PS1 is a regularly used panel that converts alternating current supplied from the power source CS1 into direct current and supplies it to the load L during normal times. The short circuit board SB is a spare board that supplies AC supplied from the power supply CSx to the load L when supply to the load L is not possible from the supply path PS1. Like the UPS panel B, the short circuit board SB has a casing that can be installed in the installation area F and a casing-side connection part 11. For example, in a casing of the same size as the casing 10 of the UPS board B, the casing side connection portion 11 is provided at the same position as the UPS board B. The supply route PSx is provided with an installation area F and a route-side connection section 21 similar to the supply route PS1. That is, the installation area F has a size that allows the UPS panel B and the short-circuit panel SB to be selectively installed, and the path-side connection section 21 is provided at the position where the case-side connection section 11 is connected.

The short-circuiting member SC housed in the housing includes a conductor such as a cable, a metal bar, or a plate. More specifically, the short-circuiting member SC short-circuits the input side of the main path R1 and the input side of the bypass path R2 of the case-side connecting portion 11, and the output side of the main path R1 and the output side of the bypass path R2. The supply path PSx is connected to the load L in parallel with the supply path PS1 by a bypass connection BP.

The switching unit allows the UPS panel B1 of the other supply route PS1 to be removed while continuing the supply of power by the supply route PSx in which the short circuit board SB has been replaced with the newly installed UPS panel B1. The switching unit includes a plurality of circuit breakers 52C, 52R, 52M, and 52L. The circuit breakers 52C and 52R open and close connections between the power supplies CSx and CS1 and the supply paths PSx and PS1. The circuit breaker 52M opens and closes the connection between the short circuit board SB and the load L. The circuit breaker 52L opens and closes the connection between the UPS panel B1 and the load L. The bypass connection part BP and the circuit breakers 52L and 52M are housed in the casing of the maintenance bypass panel MB.

[Update work]
The update work of this embodiment as described above will be explained according to the flowchart of FIG. 20. The electrical connection work and the main body replacement work are the same as in the first embodiment.

The update work of this embodiment is to replace the short circuit board SB connected to the supply route PSx with a newly installed UPS board B, and while continuing to supply power from the newly installed UPS board B, from the other supply route PS1, Remove the existing UPS panel B1.

Note that during normal operation, the circuit breakers 52R and 52L are closed, and power is supplied to the load L by the UPS panel B1. Further, although the circuit breaker 52C is closed, the circuit breaker 52M is not closed.

First, the circuit breaker 52C is opened, the connection between the case side connection part 11 and the path side connection part 21 of the short circuit board SB is released, and the short circuit board SB is removed from the installation area F (step S401).

Then, a new UPS panel B1 is installed in the installation area F from which the shorting panel SB was removed, and the connection between the housing side connection section 11 and the path side connection section 21 is performed (step S402). Then, the circuit breaker 52C is turned on and a unit test of the newly installed UPS panel B1 is performed (step S403).

Next, after turning on the circuit breaker 52M, the circuit breaker 52L is opened, and the newly installed UPS panel B1 starts supplying power to the load L (step S404). This switching is the overlap switching described above. Then, the existing UPS panel B1 is stopped, the connection between the case side connection section 11 and the path side connection section 21 is released, and it is removed from the installation area F (step S405).

Further, a short circuit board SB is installed in the installation area F from which the UPS board B1 of the supply path PS1 has been removed, the case side connection part 11 and the path side connection part 21 are connected, and the circuit breaker 52R is turned on (step S406 ). With the above steps, the power supply source for load L will be switched from "existing UPS panel B1" to "new UPS panel B1 and existing UPS panel B1" to "new UPS panel B1", but the power supply will not stop. do not have.

[Effect]
In this embodiment as described above, the UPS panel B of any other supply route PS can be removed while continuing the supply of power by using the supply route PS in which the shorting panel SB is replaced with a newly installed UPS panel B. It has a switching section to

The backup power supply path PSx is provided with an installation area F and a path-side connection section 21 common to the supply path PS1, and is connected to a short circuit board SB having a common structure with the UPS board B. Therefore, by replacing the shorting panel SB with the newly installed UPS panel B, it is possible to continue supplying power with the existing UPS panel B without having to prepare space for the updated UPS panel B. It can be replaced with UPS board B.

Furthermore, in this embodiment, the short circuit board SB is transferred from the supply path PSx to the supply path PS1, but this transfer work is also performed for the common installation area F and the path side connection section 21. It can be done easily and in a short time.

[Fourth embodiment]
[composition]
A panel exchange type power supply system according to a fourth embodiment will be described. Note that descriptions of configurations similar to those in the first, second, and third embodiments will be omitted. The panel exchange type power supply system of this embodiment is configured as a parallel redundant system. In this embodiment, the short circuit board SB is replaced with the existing UPS panel B removed from the supply route PS, and power is continued to be supplied to the supply route PS from which the existing UPS panel B was removed. It has a switching section that allows connection of the newly installed UPS panel B.

First, as shown in FIG. 21, the UPS boards B1, B2, ...Bn of the supply paths PS1, PS2, ...PSn convert the alternating current supplied from the power supplies CS1, CS2, ...CSn into direct current during normal times. This is a regularly used panel that supplies power to load L in parallel. The short circuit board SB of the supply path PSx is a spare board that supplies AC supplied from the power source CSx to the load L when the supply path PS1 cannot supply the AC to the load L. This supply path PSx and short circuit board SB are the same as those in the third embodiment.

The switching section includes a plurality of circuit breakers 52C, 52R1, 52R2,...52Rn, 52I1, 52I2,...52In, 52T1, 52T2,...52Tn, 52M, 52L. The circuit breakers 52C, 52R1, 52R2, ...52Rn open and close connections between the power supplies CSx, CS1, CS2, ...CSn and the supply paths PSx, PS1, PS2, ...PSn. The circuit breakers 52I1, I2, . The circuit breakers 52T1, T2, ...Tn are provided in the test connection section TC, and are test switching sections that interconnect the UPS panels B1, B2, ...Bn. The circuit breaker 52M opens and closes the connection between the supply path PSx and the bypass connection part BP. The circuit breaker 52L opens and closes the connection between the parallel connection part PC and the load L.

[Update procedure]
The update work of this embodiment as described above will be explained with reference to the flowchart of FIG. 22. The electrical connection work and the main body replacement work are the same as in the first embodiment.

The update work of this embodiment is performed by replacing the short circuit board SB connected to the supply route PSx with any one of the existing UPS boards B connected to the plurality of supply routes PS supplying power in parallel. By replacing panel B with short-circuit panel SB and continuing power supply by the existing UPS panel B, the newly installed UPS panel B is connected to the supply route PS from which the existing UPS panel B was removed. conduct.

In addition, during normal operation, the circuit breakers 52R1, 52R2, ...52Rn, 52I1, 52I2, ...52In, and 52L are turned on, and the power is supplied to the load L in parallel by the UPS panels B1, B2, ...Bn. I'm going to Further, although the circuit breaker 52C is closed, the circuit breaker 52M is not closed.

(Update of UPS boards B1 and B2)
The update procedure for UPS boards B1 and B2 will be explained according to the flowchart in FIG. 22. First, the circuit breakers 52R1 and 52I1 are opened to stop the existing UPS panel B1 (step S501). Then, the connection between the case side connection part 11 and the path side connection part 21 of the existing UPS panel B1 is released, and the existing UPS board B1 is removed from the installation area F of the supply path PS1 (step S502).

Next, the circuit breaker 52C is opened, the connection between the housing side connection part 11 and the path side connection part 21 of the short circuit board SB is released, and the short circuit board SB is removed from the installation area F (step S503). Then, the existing UPS panel B1 removed from the supply path PS1 is installed in the installation area F from which the short circuit board SB has been removed, and the connection between the housing side connection section 11 and the path side connection section 21 is performed (step S504). . Thereafter, by turning on the circuit breakers 52C and 52M, the existing UPS panel B1 starts supplying power (step S505).

A new UPS panel B1 is installed in the installation area F from which the existing UPS panel B1 of the supply path PS1 has been removed, and the connection between the housing side connection section 11 and the path side connection section 21 is performed (step S506). Then, the circuit breaker 52R1 is turned on and a unit test of the newly installed UPS panel B1 is performed (step S507).

Next, the circuit breaker 52I2 is opened, and the supply of power to the load L by the existing UPS panel B2 is stopped (step S508). Then, the circuit breakers 52T1 and 52T2 are turned on, and a parallel test is performed on the newly installed UPS panel B1 and the existing UPS panel B2 (step S509).

The circuit breakers 52R2 and 52T2 are opened to stop the existing UPS panel B2 (step S510). Then, the connection between the case side connection part 11 and the path side connection part 21 of the existing UPS panel B2 is released, and the existing UPS board B2 is removed from the installation area F (step S511).

A new UPS panel B2 is installed in the installation area F from which the existing UPS panel B2 was removed, and the connection between the housing side connection section 11 and the route side connection section 21 is performed (step S512). The circuit breaker 52R2 is turned on and a unit test of the newly installed UPS panel B2 is performed (step S513). Further, the circuit breaker 52T2 is turned on and a parallel test is performed on the newly installed UPS panels B1 and B2 (step S514). Thereafter, by opening the circuit breakers 52T1 and 52T2 and closing the circuit breaker 52I2, the newly installed UPS panel B2 starts supplying power to the load L (step S515).

(UPS board Bn update)
Next, the procedure for updating UPS boards Bn other than UPS boards B1 and B2 will be explained. Note that this update is similar to steps S511 to S515 described above. That is, the connection between the housing side connection part 11 and the route side connection part 21 of the existing UPS board Bn is released and removed from the installation area F.

A new UPS panel Bn is installed in the installation area F from which the existing UPS panel Bn was removed, and the connection between the housing side connection section 11 and the route side connection section 21 is established. Turn on circuit breaker 52Rn and perform a unit test on the newly installed UPS panel Bn. Furthermore, the circuit breaker 52Tn is turned on and a parallel test is performed on the newly installed UPS panels B1 and Bn. Thereafter, by opening the circuit breaker 52Tn and closing the circuit breaker 52In, the newly installed UPS panel Bn starts supplying power to the load L.

(Return of short circuit board)
Furthermore, the procedure for returning the short circuit board SB to its original state and returning to the normal operating state will be explained according to the flowchart of FIG. 23. First, the circuit breaker 52T1 is released and the circuit breaker 52I1 is closed. As a result, the newly installed UPS panel B1 starts supplying power to the load L. Then, the circuit breakers 52C and 52M are opened to stop the existing UPS panel B1 (step 601). The connection between the case side connection part 11 and the route side connection part 21 of the existing UPS panel B1 is released and removed from the installation area F (step S602). A short circuit board SB is installed in the installation area F from which the existing UPS board B1 has been removed, and the connection between the case side connection section 11 and the path side connection section 21 is performed (step S603).

(Overall update procedure)
The entire update procedure, including the update procedure as described above, according to the number of UPS panels B will be described with reference to the flowchart of FIG. 24. Note that the initialization and incrementing of variables in the flowchart may be done virtually by the operator based on his or her own judgment, or may be done by a control device, which is a computer that controls the power supply system, and visually checked by the administrator. Similar to the second embodiment, the information may be displayed on the display device as desired.

First, a variable N is initialized with the number of parallel units (step S701). Then, the existing UPS panels B1 and B2 are updated according to the procedure shown in FIG. 22 above (step S702).

If the number of parallel units is not 3 or more (NO in step S703), the short circuit board is restored according to the procedure shown in FIG. 23 above (step S708). If the number of parallel units is 3 or more (YES in step S703), the variable X is initialized to 3 (step S704). Then, the existing UPS board Bn is updated by the above procedure (step S705). If the variable X has not reached the number of parallel units (NO in step S706), the variable X is incremented (step S707), and the next existing UPS board Bn is updated (step S705).

If the above is repeated and the variable X reaches the number of parallel units (YES in step S706), the short circuit board is restored according to the procedure shown in FIG. 23 above (step S708). As described above, it is possible to update a plurality of UPS panels B while continuing to supply power to the load L using the existing UPS panel B1. For example, the control device can determine how many panels are connected in parallel (N), how many panels have been updated (X-1), and how many panels have not been updated (N-(N-). X)) may be displayed on the display device.

[Effect]
In this embodiment as described above, the existing UPS panel B can be connected to the existing UPS panel B while continuing the power supply by replacing the shorting panel SB with the existing UPS panel B removed from one of the supply routes PS. It has a switching part that allows the newly installed UPS panel B to be connected to the removed supply path PS.

For this reason, for the multiple UPS panels B connected in parallel, while continuing to supply power to the load L from the existing UPS panel B, parallel tests were also conducted between the newly installed UPS panel and the existing UPS panel. You can update the UPS board.

Furthermore, in this embodiment, the existing UPS panel B1 is transferred from the supply route PS1 to the supply route PSx, but this transfer work is also carried out in the common installation area F and route side connection section 21. It can be easily done in a short time.

[Modified example]
(1) The number of supply paths PS, UPS board B, and short circuit board SB is not limited to the number exemplified in the above embodiment. Further, the power equipment accommodated in the UPS panel B is generally a converter and an inverter, but any one of the power equipment configuring the UPS may be accommodated. Further, this embodiment is also applicable to a board other than a UPS board.

(2) As shown in Fig. 25, peripheral panels such as the input transformer panel 6, storage battery panel 7, branch panel 8, external line terminal panel O, parallel panel PB, and maintenance bypass panel MB are also connected to the same case side as described above. The replacement work may be facilitated by providing a portion 11 and connecting via a cable C passing through the bus duct BD. In this case, the peripheral discs can also be regarded as heavy discs.

(3) The number of case-side connecting portions 11 may be singular or plural, and is not limited to the above embodiment. The number of electrical connection parts that one housing side connection part 11 opens and closes may be plural or single. For example, as shown in FIG. 26, the case-side connecting portion 11 may be one, and a large number of connecting portions may be opened and closed with one operation.

(4) As shown in FIGS. 27 and 28, the housing side connecting portion 11 may be provided on both or one of the side surfaces 10d and 10e of the housing 10, and the route side connecting portion 21 may be arranged accordingly. . That is, the support portion 101 is a plate-shaped member provided on the side surfaces 10d and 10e of the housing 10 and fixed in a direction parallel to the front surface 10b. Thereby, even if there is not enough space in the upper part, it is possible to connect and disconnect the housing-side connection part 11 and the path-side connection part 21 from the front side in the same way as described above. In this case as well, the path-side connecting portion 21 and the housing-side connecting portion 11 may be housed in the housing of the external line terminal board O.

In addition, when the current value borne by each housing side connection section 11 and path side connection section 21 becomes large, R phase, S phase, and T phase of AC input, P and N of DC input, and R phase of bypass input. , S phase, T phase, and R phase, S phase, and T phase of AC output. These housing-side connecting portions 11 are arranged at intervals from each other to ensure an insulating distance. Further, the path-side connecting portions 21 are also arranged side by side at positions corresponding to the case-side connecting portions 11 with an interval between them to ensure an insulating distance.

(5) In the above embodiment, a part of the case side connection part 11 is movable with respect to a part of the path side connection part 21, but even if a part of the path side connection part 21 is movable, the case side connection Both a part of the section 11 and a part of the path-side connecting part 21 may be movable. The movable direction of the movable part is not limited to a straight line in the depth direction. For example, it may be a straight line in the height direction, a straight line in the width direction, or a straight line obliquely intersecting these straight lines. The movable path of the movable portion only needs to be guided by a guide portion, and may be crank-shaped or curved.

(6) The embodiments and aspects described above are presented as examples in this specification, and are not intended to limit the scope of the invention. That is, the present invention can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included within the scope and gist of the invention as well as within the scope of the invention described in the claims and its equivalents.

1... Main body 2... Converter 3... Inverter 4... AC switch 6... Input transformer board 7... Storage battery board 8... Branch board 10... Housing 10a... Top surface 10b... Front 10c... Back 10d, 10e... Side 101... Support part 101a ... Hole 11 ... Case side connection section 11a ... Conductor 11b ... Connection section 11c ... Slide section 111 ... Guide section 111a ... Guide rail 111b ... Slider 112 ... Movable section 112a ... Moving plate 112b ... Support plate 112c ... Guide groove 113 ... Operation section 113a...Biasing plate 113b...Handle 21...Route side connection part 211...Fixing plate 212...Terminal plate 213...Connector part 213a...Recessed part 213b...Contact electrode 52...Breaker F...Installation area R1...Main route R2...Bypass route R3 …Charge/discharge route M1…Rail part M2…Eye bolt M3…Anchor M4…Lever block M5…Hand lift M6…Square B…UPS panel I…Input panel L…Load O…External line terminal board BS…Base part PS…Supply route CS …Power supply MB…Maintenance bypass panel BP…Bypass connection section PB…Parallel panel PC…Parallel connection section

Claims (1)

A plurality of power supply routes, a route-side connection part that opens and closes an electrical connection to a case-side connection part provided in each supply route and supported by a panel having a case; A region where at least one of a part of the housing-side connection part and a part of the path-side connection part of the housing installed in the area moves relative to the other, A method for updating a panel of a power supply system having an installation area in which electrical connections can be opened and closed,
A short circuit board connected to at least one supply route and housed in the housing is provided with a short circuit member that short-circuits the divided supply route, and a UPS board connected to at least two supply routes that supplies power in parallel. Replace one of them with an existing UPS panel,
While continuing to supply power by the existing UPS panel replaced with the short circuit panel , remove the existing UPS panel from at least one other supply route among the supply routes and connect the new UPS panel,
A method for updating a power supply system panel, comprising removing an existing UPS panel that has been replaced with the shorting panel, and restoring the shorting panel .

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