JP2023002754A - Board replaceable power supply system, power supply system board update method, and short-circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board replaceable power supply system, a power supply system board update method, and a short-circuit board that enable panel upgrades to be performed easily, in a short period of time, and at low cost, while continuing supply of power even in a small space.

SOLUTION: A board replaceable power supply system includes a plurality of power supply paths PS1 and PSx, a path side connection portion 21 that is provided in each of the supply paths, performs electrical connection opening/closing with respect to a housing side connection portion 11 supported by UPS boards B1 and Bx having housings, and housed in external line terminal boards O1 and Ox, and an area where the housing is installed, which is an installation area F that enables opening and closing of electrical connection when at least one of a part of the housing-side connection portion 11 and a part of the path side connection portion 21 of the housing installed in the area moves relative to the other.

SELECTED DRAWING: Figure 7

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD Embodiments of the present invention relate to a board replaceable power supply system, a board update method of a power supply system, and a short-circuit board.

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 board and its peripheral boards, and is installed in a data center or the like. A UPS panel is a main part of an uninterruptible power supply system, and includes electric power equipment such as a converter for converting AC to DC and an inverter for converting DC to AC. The peripheral board is an input transformer board, a storage battery board, or the like.

The UPS board and peripheral board are generally housed in a substantially rectangular parallelepiped housing. These housings are often arranged in a row along the wall surface of an electrical room or the like. In addition, the depth dimension and the height dimension of the housing of the UPS board and the housing of the peripheral board are unified from the viewpoint of aesthetics. The dimensions of these housings are, for example, about a little less than 1000 mm in depth, and about 1900 mm in height for a capacity of 500 kVA, and about 2300 mm for a capacity of 1000 kVA.

A housing such as a UPS board has a door attached to the front, and the door is opened to perform maintenance and inspection of the inside of the UPS board or the inside of the peripheral board. Therefore, a working space is provided in front of the UPS board and the peripheral board. Also, the UPS board and the peripheral board are renewed when their expected life ends. Updating a board such as a UPS board and a peripheral board means replacing an existing board with a newly installed board together with the housing.

The length of the expected life of the UPS board and the peripheral board is different, and the implementation timing of the replacement work of the UPS board and the replacement work of the peripheral board is greatly different. Specifically, the expected life of the UPS board is about 15 years, and the exchange of the UPS board is set to be 15 years after delivery of the uninterruptible power supply system. On the other hand, the expected life of the peripheral disk is about 25 years, which is about 10 years later than the replacement time of the UPS disk.

JP 2014-222982 A

As mentioned above, the replacement work for the UPS board must be carried out 10 years earlier than for the peripheral board. Therefore, when the UPS board is replaced, the connection between the UPS board and the peripheral board is disconnected, but the peripheral board itself remains installed. Therefore, in the replacement work of the UPS board, only the UPS board to be replaced is removed from the fixed installation place from the group of multiple housings, and the new UPS board is installed in the same place. Become.

Considering the original role of the UPS when performing such update work, it is preferable to continue supplying power, that is, to continue supplying power. In order to deal with this, it is conceivable to separately prepare a UPS body for supplying UPS power to the load only during the update work. However, preparing a UPS main body that is used only during the updating work would result in a very high work cost and a heavy economic burden.

Also, the data center where the UPS main unit is installed does not have enough space. For this reason, it is difficult to secure a space for installing the UPS main body that is used only during the updating work.

Considering the continuous supply of electric power, which is the role of the UPS, the shorter the work period for the replacement work of the UPS itself, the better. However, the power equipment on the UPS board and the peripheral board are electrically connected via a cable, and the connecting portion is provided inside the UPS board. For this reason, when removing only the UPS board from the installation site, the disconnection work of the connection part with a plurality of cables had to be performed inside the UPS board, which was very troublesome. Furthermore, when installing a new UPS board, the work of wiring a plurality of cables must be done inside the UPS board, which is a troublesome work and a situation in which connection errors are likely to occur.

In this way, if the disconnection work and the connection work of the connection part take time and effort, the renewal cost will increase. Furthermore, in the case of UPS, the longer the construction period, the lower the safety against power failure. In order to deal with this, it is necessary to concentrate a large number of workers in the replacement work of the UPS main body, which increases labor costs and further increases the renewal cost of the UPS main body.

This embodiment has been proposed to solve the above problems, and its purpose is to easily and quickly update the panel while continuing to supply power even in a small space. To provide a board replaceable power supply system, a board renewal method of the power supply system, and a short-circuit board, which can be performed at low cost.

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

Further, in the board replacement method of the power supply system of the embodiment, the board connected to at least one supply route among the supply routes, and at least part of the power equipment constituting the UPS is connected to the housing. Removing the existing UPS panel from at least one other of the supply paths while continuing to supply power by the housed UPS panel.

It is a perspective view of the board of embodiment. It is a front view of the board of embodiment. 1 is a circuit diagram of an uninterruptible power supply system that includes embodiments; FIG. It is a perspective view of the connection part of embodiment. It is the side view (A) and top view (B) which show the connection part in a disconnection position, and a path|route side connection part. It is the side view (A) and top view (B) which show the connection part in a closing position, and a path|route side connection part. 1 is a circuit diagram of a power supply system of a first embodiment; FIG. 4 is a flow chart showing a procedure for updating a regular UPS board according to the first embodiment; 7 is a flow chart showing a procedure for updating a backup UPS board according to the first embodiment; It is a top view which shows preparations for drawing from the installation position of the weight board of embodiment. It is a top view which shows the middle of drawing out from the installation position of the weight board of embodiment. It is a top view which shows just before the completion of drawing from the installation position of the weight board of embodiment. It is a top view which shows the carry-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 weight board of embodiment. It is a top view which shows insertion to the installation position of the weight board of embodiment. It is a circuit diagram of a power supply system of a second embodiment. 9 is a flow chart showing a procedure for updating a UPS board according to the second embodiment; It is a circuit diagram of a power supply system of a third embodiment. 11 is a flow chart showing a procedure for updating a UPS board according to the third embodiment; It is a circuit diagram of a power supply system of a fourth embodiment. FIG. 12 is a flow chart showing a procedure for updating a UPS board according to the fourth embodiment; FIG. It is a flowchart which shows the reset procedure of the short circuit board of 4th Embodiment. FIG. 14 is a flow chart showing a procedure for updating UPS boards corresponding to the number of parallels according to the fourth embodiment; FIG. It is a front view which shows the example which applied embodiment to a peripheral disk. It is a front view which shows the modification of a connection part. It is a perspective view which shows the modification which provided the connection part in the side surface. FIG. 17 is a front view of a modification of FIG. 16;

[First Embodiment]
A board exchange type power supply system of the first embodiment will be described. First, the board applied to this embodiment will be described with reference to the drawings. A board to be updated in this embodiment is a UPS board 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 board has a main body portion 1 and a housing-side connection portion 11 . The main body part 1 has a housing 10 in which power equipment is housed, and is installed in a direction to stand upright on an installation surface. The UPS board of this embodiment is a board having a weight that makes it difficult for a worker to install it alone, and is also called a heavy board. 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 container. The housing 10 is installed in the installation area F on the installation surface by moving in the depth direction as indicated by the thick white arrow in the figure. The installation area F is a surface or space in which the housing 10 is installed. That is, it may be either the surface on which the housing 10 is placed or the space in which the housing 10 is accommodated. In addition, the housing 10 may or may not be in direct contact with a surface such as a floor, a wall surface, a pillar, or another adjacent board or an object forming a space. For example, a base portion BS, which will be described later, may be interposed between the bottom surface and the floor surface of the housing 10 . A spacer or the like may be interposed between adjacent wall surfaces, pillars, and boards.

The installation area F of this embodiment is a horizontal floor surface. The horizontal surface on the side opposite to the installation area F of the housing 10 installed in the installation area F is defined as an upper surface 10a. Of the four vertical surfaces of the housing 10, one of them is the front surface 10b, the opposite surface is the rear surface 10c, and the other two surfaces are the side surfaces 10d and 10e. 1 and 2, the front side is the front side. The housing 10 is provided with a door on the front side, which can be opened for maintenance and inspection of the inside. Further, the depth direction is the thickness direction between the front surface 10b and the rear surface 10c.

The power devices housed in the housing 10 are devices that function by being supplied with power. Power equipment includes equipment that forms part of a power receiving and transforming system or a power supply and distribution system. For example, electric power equipment includes equipment that constitutes a UPS, circuit breakers, switchgears such as disconnectors that open and close electric circuits, transformers, protective relays, and the like. Equipment for monitoring facilities, such as PLCs, relays, arresters, hubs, timers, etc., is also included in power equipment. Power equipment also includes terminal boards and circuit boards having electrical contacts. Furthermore, power consumption devices such as air conditioners, computers, and display devices are also included in power devices.

The power equipment accommodated in the housing 10 of the UPS board of the present embodiment is equipment that constitutes a part of the UPS. As a UPS, as will be described later, it can be applied to both a regular backup 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 the converter 2, the inverter 3, and the AC switch 4, as shown in FIG. The converter 2 is a device that converts alternating current into direct current. The inverter 3 is a device that converts direct current into alternating current. The converter 2 and the inverter 3 are connected to a main path R1 from an AC input to an output in a steady state. AC switch 4 is a device that opens and closes bypass route R2 that does not pass through converter 2 and inverter 3 . The bypass route R2 is a route through which AC power is directly sent from the AC input to the output during maintenance and inspection or in the event of a failure. A charging/discharging route R3 is branched from the main route R1 between the converter 2 and the inverter 3 .

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. FIG. The input transformer board 6 is a board containing a step-down transformer connected to a commercial power supply. The charge/discharge path R3 is connected to the storage battery of the storage battery board 7 . The storage battery board 7 is a board containing a storage battery that serves as a power supply during a power failure. Output sides of the main route R1 and the bypass route R2 are connected to the branch board 8 . The branch board 8 is a board connected to a connection device that consumes power. The input transformer board 6, storage battery board 7, branch board 8, etc. are hereinafter referred to as peripheral boards. Although not shown, the peripheral board is installed in an electric room or the like in which the main body 1 is accommodated. It may be installed at a position adjacent to the housing 10 of the main body 1 .

The housing-side connecting portion 11 is provided at a position corresponding to the path-side connecting portion 21 provided outside the housing 10, as shown in FIGS. When the housing 10 is installed in the installation area F, the housing-side connecting portion 11 comes to a position facing the path-side connecting portion 21 . At this time, as will be described later, the electrically connecting portion between the housing-side connecting portion 11 and the path-side connecting portion 21 comes to a position where they can be connected. However, the electrical connection between the housing-side connection portion 11 and the path-side connection portion 21 is released only by pushing the housing 10 into the installation area F and installing it.

At least one of a portion of the housing-side connection portion 11 and a portion of the path-side connection portion 21 moves relative to the other, so that electrical connection can be opened and closed. In other words, the housing-side connecting portion 11 is supported by the housing 10, and the path-side connecting portion 21 is supported at a predetermined mounting location, but at least one of the conductor portions that are part of each of them contacts and separates from the other. By moving in the direction, an electrical connection can be opened or closed. This movement of the conductor portion may be performed by either one of the housing-side connection portion 11 and the path-side connection portion 21, or both. Note that this movement is guided in a specific direction by a guide section or the like, 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 and connecting it to a terminal. .

The housing-side connection portion 11 of the present embodiment is supported outside the outer peripheral edge of the housing 10 when viewed from the front side of the housing 10 in a state where the main body 1 is installed on the installation surface. connected to each other. The outer peripheral edge is a frame along the outer surfaces of the upper surface 10a and both side surfaces 10d and 10e. Supporting outward from the outer peripheral edge when viewed from the front side means that the portion where the housing side connection part 11 is supported is not hidden behind the back surface, and protrudes outward from the upper surface 10a and the side surfaces 10d and 10e. Say things. It is preferable for the operator to confirm, grasp, and operate from the front side that the electrical connection portion is located outside the outer peripheral edge. However, part of the housing-side connection portion 11 and part of the electrical connection portion may be hidden behind the housing 10 .

A portion of the conductor portion of the casing-side connection portion 11 is movable according to the position of the path-side connection portion 21 fixed to the equipment outside the casing 10 in a state where the main body 1 is installed on the installation surface. It is the provided movable side connection part. As shown in FIG. 3, a plurality of housing-side connecting portions 11 of the present embodiment are provided, and are respectively provided on the input side of the main route R1, the input side of the bypass route R2, the charging/discharging route R3, the output of the main route R1 and the bypass route R2. connected to the side. Since the housing-side connecting portion 11 is supported at the position as described above, the electrical connection between the housing-side connecting portion 11 and the path-side connecting portion 21 can be handled by the operator from the front side of the housing 10 . Easy to see and understand.

The path-side connecting portion 21 is a component fixed to equipment outside the housing 10 . The term "external equipment" as used herein refers to equipment that constitutes the location where the housing 10 is installed or equipment that is installed at this location. The equipment of the present embodiment is equipment that constitutes the electrical room, equipment installed in the electrical room, and includes walls of the electrical room, a board installed in the electrical room, a frame surrounding the housing 10, and the like. For example, the path-side connection unit 21 may be housed in a housing different from the housing 10, such as an external line terminal board, which will be described later, and may be housed in boards adjacent to the upper part, left and right, etc. of the housing 10. .

The path-side connecting portion 21 is electrically connected to the peripheral board via a cable C. As shown in FIG. For example, the cables C from the input transformer board 6, the storage battery board 7, and the branch board 8 are extended through a bus duct or the like and connected to the route-side connecting portion 21. FIG. As shown in FIG. 3 , a plurality of path-side connection portions 21 are provided corresponding to the housing-side connection portions 11, and by connecting the housing-side connection portions 11 to the path-side connection portions 21, the main route 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 side 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 to the path-side connecting portion 21 is connected to the path-side connecting portion 21 with the housing 10 installed on the installation surface. It is provided so as to be movable between a disconnected position that is separated and a closed position that is electrically connected to the path-side connecting portion 21 . Further, a plurality of housing-side connecting portions 11 are provided for each AC phase. Further, a plurality of housing-side connection portions 11 are provided separately for alternating current and direct current.

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

More specific configurations of the housing-side connection portion 11 and the path-side connection portion 21 will be described below.
(Chassis side connection)
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-like 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 connecting portion 11 is supported by the upper surface 10 a of the housing 10 .

The housing-side connection portion 11 supported by the support portion 101 has a guide portion 111 , a movable portion 112 and an operation portion 113 . The guide part 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 part 21 . The guide portion 111 has 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 rear 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 an elongated rectangular tubular 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 portion 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 plate 112b has a pair of flat plate shapes protruding in parallel in the depth direction, and is attached to the rear side of the moving plate 112a. The support plate 112b has a guide groove 112c extending in the depth direction. A pair of conductors 11a are movably supported along guide grooves 112c of a support plate 112b.

Therefore, the conductor 11a can move 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 projecting portion inserted into a linear guide groove 112c which is a guide portion different from the guide portion 111. As shown in FIG. Therefore, the conductor 11a can move in the depth direction of the housing 10 along the guide groove 112c. Since the cable connected to the conductor 11a is flexible, electrical continuity with the cable is ensured even when such movement occurs. In other words, the housing-side connection portion 11 has a conductor 11a that can move in a straight line by being guided by a guide portion (a 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 connection portion 21. As shown in FIG.

The operating portion 113 is a member for manually operating the position of the conductor 11a. The operating portion 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 elongated in the width direction. A substantially U-shaped connecting portion 11b that connects the pair of conductors 11a is attached to the biasing plate 113a. That is, the connection portion 11b attached to the conductor 11a provided on the back side of the support portion 101 passes through the hole 101a formed in the support portion 101, and the biasing plate provided on the front side of the support portion 101 passes through the hole 101a. 113a with insulation secured. The urging plate 113a is made of a transparent material so that the inserted state of the conductor 11a can be visually recognized. The handle 113b is a substantially U-shaped rod-shaped member. Both ends of the handle 113b are fixed to the front surface of the biasing plate 113a so that the longitudinal direction of the handle 113b is aligned with the width direction of the housing 10 .

(Route side connection part)
The path-side connection portion 21 is a member that electrically connects with the cable C via the housing-side connection portion 11 . The path-side connecting portion 21 has 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 . Terminal plate 212 is a conductive plate fixed to fixed plate 211 . The upper end of the terminal plate 212 serves as an end for connection with the terminal of the cable C. As shown in FIG. For example, although not shown, a connection hole is 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 portion 213 constitute a fitting portion that is electrically connected by moving the conductor 11a from the housing-side connection portion 11 toward the path-side connection portion 21 and fitting each other. . The connector portion 213 has a concave portion 213a and a contact electrode 213b. The recess 213a is a recessed portion into which the conductor 11a is inserted. The contact electrode 213 b is a member provided in the recess 213 a and electrically connected to the terminal plate 212 .

A plurality of such connector portions 213 are arranged with respect to the conductor 11a. In this embodiment, three connector portions 213 are provided. The contact electrodes 213b of the connector portion 213 equally share the rated current. For example, if the rated current is 300A, a current of about 100A can be passed. However, it may be a single connector portion 213 that bears the rated current. A member that moves for electrical connection can be provided in one or both of the housing-side connection portion 11 and the path-side connection portion 21 . For example, the housing-side connecting portion 11 may be provided with a connector portion, and the path-side connecting portion 21 may be provided with a moving conductor. Moreover, both the connector portion and the conductor may be provided so as to be movable in the connecting direction.

As shown in FIGS. 1 and 2, a plurality of sets of the housing-side connection portion 11 and the path-side connection portion 21 are prepared by being divided into input/output sections. For example, the housing-side connection portion 11 and the path-side connection portion 21 are separately provided 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 spaced apart from each other to ensure an insulation distance. Further, the path-side connecting portions 21 are also arranged side by side with a space therebetween at positions corresponding to the housing-side connecting portions 11 to secure an insulation distance. Furthermore, by dividing the housing-side connecting portion 11 and the path-side connecting portion 21 into a plurality of sets in this way, the insertion/removal load of the fitting portion is reduced.

[Discrete power supply system]
FIG. 7 is a circuit diagram of the board exchange type power supply system of this embodiment. The board exchange type power supply system of this embodiment is configured as a regular backup uninterruptible power supply system. FIG. 7 shows, as an electric circuit, a mode in which UPS boards B1 and Bx are connected to power supply paths PS1 and PSx between the power supply CS and the load L of the commercial system. The storage battery board 7 and the branch board 8 indicated by are omitted from the drawing. In the following description, the supply paths PS1 and PSx may simply be referred to as supply paths PS when not distinguished, and the UPS boards B1 and Bx may simply be referred to as UPS boards B when not distinguished.

That is, the board 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, are connected to AC power supplies CS1 and CSx such as commercial systems, respectively, and can be supplied with AC power. The supply paths PS1, PSx are connected in parallel to the load L via the parallel connection PC. The load L is equipment that converts or consumes supplied power to perform various tasks. The parallel connection part PC is configured by a cable or the like. The parallel connection part PC may be accommodated in the housing of the peripheral board.

The supply paths PS1 and PSx are provided with the path-side connection portions 21 as described above, and the installation area F is provided in the vicinity of the path-side connection portions 21 . In the installation areas F corresponding to the supply paths PS1 and PSx, the main bodies 1 of the UPS boards B1 and Bx as described above are installed, respectively. A power device housed in the body 10 is connected. This connection is performed in two stages: installation of the housing 10 in the installation area F and connection between the housing-side connection portion 11 and the path-side connection portion 21 . It should be noted that the installation area F is applied to the circuit diagram and shown for convenience, and its size and shape are not specified.

The UPS board B1 of the supply path PS1 is a common board that converts the alternating current supplied from the power supply CS1 into direct current and supplies it to the load L in normal times. The UPS board Bx on the supply path PSx is a spare board that converts alternating current supplied from the power source CSx into direct current and supplies it to the load L when the load L cannot be supplied from the supply path PS1.

The switching unit selectively switches the supply source of power to the load L to one of the UPS boards B1 and Bx of the two supply paths PS1 and PSx, thereby supplying power from the selected UPS board B1 or UPS board Bx. while continuing to supply the UPS board B1 or the UPS board Bx.

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

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

The circuit breaker 52R is accommodated in the housing of the input board I1 (input transformer board 6). The breaker 52C is accommodated in the housing of the input panel Ix (input transformer panel 6). The circuit breaker 52MC is accommodated in the housing of the external line terminal board Ox. The circuit breakers 52RC, 52M, 52L are accommodated in the housing of the external line terminal board O1. The external line terminal boards Ox and O1 are boards in which the path-side connecting portions 21 are accommodated in housings. In the following description, the input board may be simply referred to as input board I when the input boards are not distinguished, and the external terminal board may be referred to as external terminal board O when the external terminal board is not distinguished.

[Update work]
The update work of the board exchange type power supply system as described above will be described with reference to the flow charts of FIGS. 8 and 9. FIG. The update work of this embodiment is to remove the existing UPS board B from another supply path PS while continuing to supply power through one supply path PS. That is, while the UPS board B1 or Bx connected to one supply path PS1 or PSx of the plurality of supply paths PS1 or PSx continues to supply electric power, the other supply path PS1 or PSx supplies power to the UPS Remove board B1 or Bx. Then, a new UPS board is connected in place of the removed UPS board B1 or Bx.

(Renewal of regular UPS board)
The work of updating the regular UPS board B1 will be described with reference to FIG. During normal operation, the circuit breakers 52R, 52RC, and 52L are closed, and power is supplied to the load L by the UPS board B1. Also, the circuit breakers 52C and 52MC are closed, but the circuit breaker 52M is open, so that the UPS board Bx continues to operate with no load and stands by.

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

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

A newly installed UPS board B1 is installed in the installation area F from which the existing UPS board B1 has been removed, and the housing side connection portion 11 and the route side connection portion 21 are connected (step S104). The work of installing the newly installed UPS board B1 and the work of connecting the housing-side connection portion 11 and the path-side connection portion 21 will be described later.

Then, the circuit breakers 52R and 52RC are turned on to perform a unit test of the newly installed UPS board B1 (step S105). Furthermore, 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 newly installed UPS board B1 and the UPS board Bx are in phase, the circuit breaker 52M is opened after the circuit breaker 52L is closed before the circuit breaker 52M is opened. As a result, the power supply source for the load L is switched from "UPS board Bx only" → "UPS board Bx and new UPS board B1 →"new UPS board B1 only", but the power supply does not stop. .

(Renewal of spare UPS board)
Next, the work of updating the spare UPS board Bx will be described with reference to FIG. First, the circuit breakers 52C and 52MC are opened to stop the existing UPS board Bx (step S201). Then, the connection between the housing side connection portion 11 and the route side connection portion 21 of the existing UPS board Bx is released and removed from the installation area F (step S202).

A newly installed UPS board Bx is installed in the installation area F from which the existing UPS board Bx has been removed, and the housing side connection section 11 and the path side connection section 21 are connected (step S203). Then, the circuit breakers 52C and 52MC are turned on to perform a unit test of the newly installed UPS board Bx (step S204). After that, the UPS board Bx continues to operate with no load and stands by.

[Electrical connection work]
Next, the operation of electrically connecting and disconnecting the housing-side connecting portion 11 and the path-side connecting portion 21 as described above will be described. Prior to the electrical connection work and disconnection work, the safety is ensured by disconnecting the charged portion using a circuit breaker or the like, so the description thereof is omitted. As shown in FIGS. 4, 5A, and 5B, when the body portion 1 is installed in the installation area F, the conductor 11a and the recessed portion 213a of the connector portion 213 are separated from each other and face each other. That is, at this time, the housing-side connecting portion 11 is in the disconnected position.

An operator holds the handle 113b of the operation portion 113 and moves it in the width direction as shown in FIG. is adjusted, the biasing plate 113a is pushed toward the rear side as shown in FIG. 5(A). Then, as shown in FIGS. 6A and 6B, the connecting portion E of the conductor 11a moves linearly in the depth direction, fits into the concave portion 213a of the connector portion 213, and contacts the contact electrode 213b. electrically connected. As a result, the housing-side connecting portion 11 is placed in the closed position, and the cable C is connected to the power equipment inside the housing 10 via the housing-side connecting portion 11 and the path-side connecting portion 21 . By connecting with the cable C, the peripheral board and the power equipment inside the housing 10 are connected.

[Electrical disconnection work]
When disconnecting the housing-side connection portion 11 and the path-side connection portion 21, as shown in FIGS. 6A and 6B, hold the handle 113b of the operation portion 113 and pull it toward the front side. Then, the conductor 11a is removed from the recess 213a of the connector portion 213, and the electrical connection with the contact electrode 213b is released. As a result, the housing-side connecting portion 11 is at the disconnected position as shown in FIGS.

[Main unit replacement work]
Next, the work for replacing the main body 1 will be described.

(Work to carry out the main body)
An operation of carrying out the main body 1 will be described with reference to FIGS. 10 to 13. FIG. In addition, in the installation area F, the base part BS is placed. The base portion BS is a rectangular frame-like plate interposed between the main body portion 1 and the installation surface and supporting the main body portion 1 . Note that "installed on the installation surface" includes both the case where the housing 10 is installed in direct contact with the installation surface and the case 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 portions M1 in front of the installation area F where the housing 10 is installed. An eyebolt M2 is attached to an attachment hole (not shown) on the front surface of the housing 10 . Further, an anchor M3 is fixed near the floor surface 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 on the eyebolt M2 attached to the mounting hole, and the housing 10 is pulled out from the installation area F by operating the lever block M4.

As shown in FIG. 11, when the housing 10 is pulled out to expose a mounting hole (not shown) on the side surface of the housing 10, the operation of pulling out the housing 10 is temporarily stopped. Then, the hook portion of the lever block M4 is removed from the eyebolt M2 in the front attachment hole, and the eyebolt M2 is attached to the side attachment hole. By hooking the hook portion of the lever block M4 on the eyebolt M2 and operating the lever block M4, the housing 10 is pulled out further.

As shown in FIG. 12, when the housing 10 is further pulled out to expose the mounting hole on the side surface of the housing 10 closer to the rear surface, the drawing operation is temporarily stopped. Then, the hook portion of the lever block M4 is removed from the eyebolt M2, and the eyebolt M2 is attached to the mounting hole closer to the back side. By hooking the hook portion of the lever block M4 on the eyebolt M2 and operating the lever block M4, the housing 10 is pulled out further. As a result, the housing 10 is completely lowered from the base portion BS, and the entire housing 10 is pulled out to the loading/unloading space S.

As shown in FIG. 13, the housing 10 pulled out to the loading/unloading space S is lifted by a jack or the like, and the hand lift M5 is inserted. Finally, using the hand lift M5, the worker H carries the housing 10 outside through the carry-in/carry-out space S, and the carry-out operation of the main body 1 is completed.

(Carrying in the main body)
Next, the carrying-in operation of the main body 1 will be described with reference to FIGS. 14 to 16. FIG. As shown in FIG. 14, a plurality of workers H carry the housing 10 of the main body 1 to the front of the installation area F using the hand lift M5.

As shown in FIG. 15, four square timbers M6 are installed in front of the front of the housing 10, the housing 10 is lifted by a jack or the like, the hand lift M5 is pulled out from under the housing 10, and the square timbers M6 are lifted. put it on Then, two parallel rail portions M1 are arranged between the square members M6, and the housing 10 is placed on the rail portions M1.

As shown in FIG. 16, eyebolts M2 are attached to attachment holes (not shown) on the side surface of the housing 10. As shown in FIG. Further, an anchor M3 is fixed near the floor surface of the loading/unloading space S, and a lever block M4 is attached to the anchor M3. Then, the hook portion of the lever block M4 is hooked on the eyebolt 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 portion BS, the hook portion of the lever block M4 is removed from the eyebolt M2, and the eyebolt M2 is removed from the mounting hole. Carry-in work of 1 is completed.

[Effect]
In the board-exchangeable power supply system of the present embodiment as described above, a plurality of power supply paths PS and the housing-side connection portion 11 provided in each supply path PS and supported by the board having the housing 10 a path-side connecting portion 21 for opening and closing an electrical connection; At least one of the portions of the connection portion 21 has an installation region F in which electrical connection can be opened and closed by moving relative to the other.

For this reason, by utilizing the installation area F in which the existing board is installed, the board can be renewed without preparing a new board for renewal, even in a small space, while continuing to supply power. It can be performed. Further, the removal of the existing board can be done in two stages: disconnection of the electrical connection between the housing side connection portion 11 and the path side connection portion 21, and removal of the housing 10 from the installation area F. Furthermore, the installation of a new board can be done in two steps, that is, after installing the housing 10, the housing-side connecting portion 11 and the path-side connecting portion 21 are electrically connected. As a result, the disconnection and wiring work of a plurality of cables does not take time and effort, and the board renewal work can be performed easily, in a short period of time, and at a low cost. This leads to prevention of human error in wiring work. In addition, since the update work takes a short time, the risk of power outages can be reduced.

The effects described above are even more effective when the board to be replaced is a heavy board as in the present embodiment. In other words, since moving each weight panel requires a lot of labor as described above, the electrical connection work can be simplified, making the overall update work easier and shortening the work time. , the cost can be reduced. This is the same even in a large system in which three or more boards are exchanged. Furthermore, the switching unit (circuit breaker 52) that releases the charging of the supply path PS is located in a location that cannot be visually confirmed by the updating operator, such as a housing, section, room, or building separate from the board to be updated. Sometimes. In this case, even if the switching unit is turned on due to an erroneous operation or the like, even if the charging state is not intended by the update operator, the housing side connection portion 11 and the path side connection portion 21 can be used in the vicinity of the board. Since the supply path PS can be opened and closed, the work can be carried out safely.

Also, at least two of the supply paths PS have parallel connections PC that connect the UPS boards B in parallel. Then, by selectively switching the power supply source to one of the UPS boards B on the supply path PS, the selected UPS board B continues to supply power while the other UPS board B is switched. It has a switching part that can be replaced.

Therefore, it is possible to remove the existing UPS board B from at least one other supply path while continuing to supply electric power by the UPS board B connected to at least one supply path PS. Moreover, since the power supply can be continued by the UPS board B instead of direct power from the commercial system, reliability can be ensured.

[Second embodiment]
[Constitution]
A board exchange type power supply system of the second embodiment will be described. In addition, description is abbreviate|omitted about the structure similar to 1st Embodiment. The present embodiment selectively switches the source of power supply to at least one UPS board B of the at least three supply paths PS, thereby continuing to supply power by the selected UPS board B while other Any two UPS boards B can be exchanged, and a switching unit is provided to enable parallel testing of both. A parallel test is a test for synchronizing the power phases of a plurality of UPS boards B. FIG.

FIG. 17 is a circuit diagram of the board 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 path PS is the same as in the first embodiment. The supply paths PS1, PS2, PS3 are connected in parallel to the load L via the parallel connection PC. Also, the supply paths PS1, PS2, and PS3 are connected in parallel via the test connection portion TC. The test connection portion TC is configured including a cable and the like.

The UPS boards B1, B2, and B3 of the supply paths PS1, PS2, and PS3 are normal boards that normally convert the alternating current supplied from the power supplies CS1, CS2, and CS3 into direct current and supply it to the load L in parallel. . In the present embodiment, power can be supplied by any one of the UPS boards B1, B2, and B3, but the power is shared and supplied by the three UPS boards B1, B2, and B3.

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

The switching unit selectively switches the power supply source for the load L to any one of the UPS boards B of the three supply paths PS1, PS2, and PS3, thereby supplying power from the selected UPS board B. , the other two UPS boards B can be exchanged and tested in parallel. The switching unit includes a plurality of circuit breakers 52C, 52R1, 52R2, 52R3, 52I1, 52I2, 52I3, 52T1, 52T2, 52T3, 52M, and 52L.

Circuit breakers 52C, 52R1, 52R2 and 52R3 open and close connections between power supplies CSx, CS1, CS2 and CS3 and supply paths PSx, PS1, PS2 and PS3. The circuit breakers 52I1, I2, I3 are parallel switching units that are provided in the parallel connection unit PC and open and close connections between the UPS boards B1, B2, B3 and the load L. Circuit breakers 52T1, T2, and T3 are provided in the test connection portion TC, and are test switching portions that connect the UPS boards B1, B2, and B3 to each other. 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 portion PC and the load L.

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

[Update work]
The update work of the panel exchange type power supply system as described above will be described with reference to the flowchart of FIG. 18 . Initialization and incrementing of variables in the flowchart may be virtual ones performed by the operator at his/her own discretion, or may be performed by a control device, which is a computer that controls the power supply system, and visually recognized by the administrator. It may be displayed on the display device so that it becomes possible. The electrical connection work and the replacement work of the main body are the same as in the first embodiment.

In the update work of this embodiment, one of the existing UPS boards B connected to the other two supply paths PS is removed while the power supply is continued by the UPS board B connected to one supply path PS. After that, it will be replaced with a newly installed UPS board B, and both will be tested in parallel.

During normal operation, the circuit breakers 52R1, 52R2, 52R3, 52I1, 52I2, 52I3, and 52L are closed, and power is supplied to the load L in parallel by the UPS boards B1, B2, and B3. and

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

A newly installed UPS board B1 is installed in the installation area F from which the existing UPS board B1 has been removed, and the housing side connection section 11 and the route side connection section 21 are connected (step S304). Then, the circuit breaker 52R1 is turned on to perform a unit test of the newly installed UPS board B1 (step S305).

Next, the breaker 52I2 is released, the existing UPS board B2 is stopped and the parallel operation is canceled, the breakers 52T1 and 52T2 are turned on, and the parallel test between the newly installed UPS board B1 and the existing UPS board B2 is performed. (step S306). At this time, it is assumed that power is being supplied to the load L by the UPS board 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, in the same manner as the UPS board B1, the existing UPS board B2 is stopped, released/removed, the newly installed UPS2 is installed/connected, and unit tests and parallel tests are performed (steps S302 to S306). Note that the parallel test here is performed with the newly installed UPS board B1 and the newly installed UPS board B2 by turning on the circuit breakers 52T1 and 52T2.

At this stage, since the counter variable X is 2 or more (YES in step 307), the circuit breakers 52T1 and 52T2 are opened and the circuit breaker 52I2 is turned on to connect the new UPS panel B3 in parallel with the existing UPS panel B3. B2 starts supplying power to 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, in the same manner as the UPS board B2, the existing UPS board B3 is stopped, released/removed, the newly installed UPS 3 is installed/connected, unit tests, and parallel tests are performed (steps S302 to S306). Note that the parallel test here is performed with the newly installed UPS board B1 and the newly installed UPS board B3 by turning on the circuit breakers 52T1 and 52T3. At this time, power is supplied to the load L by the UPS board B2.

At this stage, since the counter variable X is 2 or more (YES in step S307), the circuit breaker 52T3 that had been turned on for the parallel test is opened, and the circuit breaker 52I3 that had been opened is turned on. In parallel with the UPS board B2, the newly installed UPS board B3 starts supplying power to the load L (step S308). By opening the circuit breaker 52T1 and closing the circuit breaker 52I1, the newly installed UPS board B1 starts supplying power to the load L in parallel with the newly installed UPS boards B2 and B3.

Then, since the counter variable X has reached the number N of parallel connections (YES in step S309), updating ends. For example, the number of boards connected in parallel (N), the number of boards that have been updated (X-1), the number of boards that have not been updated (N-(X- 1)) may be displayed on the display device.

As described above, in this embodiment, the power supply sources for the load L are "existing UPS boards B1, B2, B3" → "existing UPS boards B2, B3" → "existing UPS boards B3 only" → "New UPS board B2 and existing UPS board B3" → "New UPS board B2 only" → "New UPS board B2 and new UPS board B3" → "New UPS board B1, B2, B3" However, the power supply never stops.

[Effect]
In the present embodiment as described above, by selectively switching the power supply source to at least one UPS board B of at least three supply paths PS, the selected UPS board B continues to supply power. On the other hand, it has a switching unit that enables replacement of one of the other two UPS boards B and enables parallel testing of both.

Therefore, by utilizing a plurality of UPS boards B operated in parallel and their installation area F, power supply can be continued even in a small space without preparing a new UPS board B for renewal. Meanwhile, the update work of the UPS board B can be performed. Even during the update work, there are cases where power can be shared by a plurality of UPS boards B operated in parallel.

[Third Embodiment]
[Constitution]
A board exchange type power supply system of the third embodiment will be described with reference to FIG. Note that descriptions of configurations similar to those of the first and second embodiments are omitted. In this embodiment, one of the supply paths PS includes a short-circuit board SB in which a short-circuit member SC for short-circuiting the divided supply path PS is housed in a housing, and a UPS board B1. It is provided so as to be selectively connectable via the connecting portion 21 .

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

The UPS board B1 of the supply path PS1 is a common board that converts the alternating current supplied from the power supply CS1 into direct current and supplies it to the load L in normal times. The short-circuit board SB is a spare board that supplies the load L with the alternating current supplied from the power source CSx when the load L cannot be supplied from the supply path PS1. Like the UPS board B, the short-circuit board SB has a housing that can be installed in the installation area F and a housing-side connection portion 11 . For example, a housing having the same size as the housing 10 of the UPS board B is provided with the housing-side connecting portion 11 at the same position as the UPS board B. FIG. The supply path PSx is provided with an installation area F and a path-side connection portion 21 similar to those of the supply path PS1. In other words, the installation area F has a size that allows selective installation of the UPS board B and the short-circuit board SB, and the path-side connection portion 21 is provided at the position where the housing-side connection portion 11 is connected.

The short-circuit member SC housed in the housing includes a conductor such as a cable, a metal rod, or a plate. More specifically, the short-circuit member SC short-circuits the input side of the main route R1 and the input side of the bypass route R2 of the housing-side connection portion 11 and the output side of the main route R1 and the output side of the bypass route 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 makes it possible to remove the UPS board B1 of the other supply path PS1 while continuing to supply electric power through the supply path PSx in which the short-circuit board SB is replaced with the newly installed UPS board B1. The switching unit includes a plurality of circuit breakers 52C, 52R, 52M, and 52L. The circuit breakers 52C, 52R open and close connections between the power sources CSx, CS1 and the supply paths PSx, 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 board B1 and the load L. The bypass connection part BP and the circuit breakers 52L and 52M are housed in the housing of the maintenance bypass board MB.

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

In the update work of this embodiment, the short-circuit board SB connected to the supply path PSx is replaced with a newly installed UPS board B, and while the newly installed UPS board B continues to supply power, from the other supply path PS1, Remove the existing UPS board B1.

During normal operation, the circuit breakers 52R and 52L are closed, and power is supplied to the load L by the UPS board B1. Also, the circuit breaker 52C is closed, but the circuit breaker 52M is not closed.

First, the circuit breaker 52C is opened, the connection between the housing side connection portion 11 and the path side connection portion 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 newly installed UPS board B1 is installed in the installation area F from which the short-circuit board SB has been removed, and the housing-side connection portion 11 and the route-side connection portion 21 are connected (step S402). Then, the circuit breaker 52C is turned on to perform a unit test of the newly installed UPS board B1 (step S403).

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

Furthermore, 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 housing-side connection portion 11 and the route-side connection portion 21 are connected, and the circuit breaker 52R is turned on (step S406). ). With the above work, the power supply source for the load L is switched from "existing UPS board B1" → "new UPS board B1 and existing UPS board B1" → "new UPS board B1", but the power supply will not stop. Absent.

[Effect]
In the present embodiment as described above, the supply path PS in which the short-circuit board SB is replaced with the newly installed UPS board B enables the UPS board B of any other supply path PS to be removed while continuing to supply electric power. It has a switching unit for switching.

The backup power supply path PSx is provided with an installation area F and a path-side connection portion 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. For this reason, by replacing the short-circuit board SB with the newly installed UPS board B, the new UPS board B can continue to be supplied with power by the existing UPS board B without preparing a space for the new UPS board B. can be replaced with UPS board B.

Furthermore, in the present embodiment, the short circuit board SB is moved from the supply path PSx to the supply path PS1. It can be done easily and in a short time.

[Fourth embodiment]
[Constitution]
A board exchange type power supply system of the fourth embodiment will be described. Note that descriptions of configurations similar to those of the first, second, and third embodiments are omitted. The board 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 board B removed from the supply path PS, while continuing to supply electric power to the supply path PS from which the existing UPS board B is removed. It has a switching unit that enables the newly installed UPS board B to be connected.

First, as shown in FIG. 21, UPS boards B1, B2, . . . Bn on supply paths PS1, PS2, . It is a common board that supplies power to the load L in parallel. The short-circuit board SB of the supply path PSx is a spare board that supplies the load L with the alternating current supplied from the power source CSx when the load L cannot be supplied from the supply path PS1. The supply path PSx and the short circuit board SB are the same as in the third embodiment.

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, . Circuit breakers 52I1, I2, . The circuit breakers 52T1, T2, . . . Tn are provided in the test connection part TC, and are test switching parts that connect the UPS boards B1, B2, . The circuit breaker 52M opens and closes the connection between the supply path PSx and the bypass connection portion BP. The circuit breaker 52L opens and closes the connection between the parallel connection portion PC and the load L.

[Update procedure]
The update work of this embodiment as described above will be described with reference to the flowchart of FIG. 22 . The electrical connection work and the replacement work of the main body 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 path PSx with any one of the UPS boards B connected to the plurality of supply paths PS supplying power in parallel. By connecting the new UPS board B to the supply path PS from which the existing UPS board B was removed, while continuing to supply power by the existing UPS board B that was replaced with the board B and replaced with the short-circuit board SB. conduct.

During normal operation, the circuit breakers 52R1, 52R2, . going to Also, the circuit breaker 52C is closed, but the circuit breaker 52M is not closed.

(Updating UPS boards B1 and B2)
The procedure for updating the UPS boards B1 and B2 will be described with reference to the flowchart of FIG. First, the circuit breakers 52R1 and 52I1 are opened to stop the existing UPS board B1 (step S501). Then, the connection between the housing-side connection portion 11 and the path-side connection portion 21 of the existing UPS board B1 is released, and 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 portion 11 and the path side connection portion 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 board 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 housing-side connection portion 11 and the path-side connection portion 21 are connected (step S504). . After that, by closing the circuit breakers 52C and 52M, the existing UPS board B1 starts to supply electric power (step S505).

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

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

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

A newly installed UPS board B2 is installed in the installation area F from which the existing UPS board B2 has been removed, and the housing side connection section 11 and the route side connection section 21 are connected (step S512). The circuit breaker 52R2 is turned on to perform a unit test of the newly installed UPS board B2 (step S513). Further, the circuit breaker 52T2 is turned on to perform a parallel test of the newly installed UPS boards B1 and B2 (step S514). After that, the circuit breakers 52T1 and 52T2 are opened and the circuit breaker 52I2 is turned on to start supplying power to the load L by the newly installed UPS board B2 (step S515).

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

A newly installed UPS board Bn is installed in the installation area F from which the existing UPS board Bn has been removed, and the housing side connection section 11 and the route side connection section 21 are connected. The circuit breaker 52Rn is turned on to perform a unit test of the newly installed UPS board Bn. Furthermore, the circuit breaker 52Tn is turned on to perform a parallel test of the newly installed UPS boards B1 and Bn. After that, the circuit breaker 52Tn is opened and the circuit breaker 52In is turned on to start supplying power to the load L by the newly installed UPS board Bn.

(recovery 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 described with reference to the flow chart of FIG. First, the circuit breaker 52T1 is released and the circuit breaker 52I1 is closed. As a result, power supply to the load L by the newly installed UPS board B1 starts. Then, the circuit breakers 52C and 52M are opened to stop the existing UPS board B1 (step 601). The connection between the housing side connection portion 11 and the path side connection portion 21 of the existing UPS board 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 connection between the housing-side connection portion 11 and the path-side connection portion 21 is performed (step S603).

(Overall update procedure)
The entire update procedure according to the number of UPS boards B, including the update procedure as described above, will be described with reference to the flow chart of FIG. Initialization and incrementing of variables in the flowchart may be virtual ones performed by the operator at his/her own discretion, or may be performed by a control device, which is a computer that controls the power supply system, and visually recognized by the administrator. It is the same as in the second embodiment that it may be displayed on the display device so that it becomes possible.

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

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

When the above is repeated and the variable X reaches the parallel number (YES in step S706), the short-circuiting board is restored by the procedure shown in FIG. 23 (step S708). As described above, it is possible to update a plurality of UPS boards B while continuing to supply power to the load L from the existing UPS board B1. For example, the number of boards connected in parallel (N), the number of boards that have been updated (X-1), the number of boards that have not been updated (N-(N- X)) may be displayed on a display device.

[Effect]
In the present embodiment as described above, the existing UPS board B is replaced with the existing UPS board B removed from any of the supply paths PS, while the supply of power is continued by the supply path PS. The removed supply path PS has a switching unit that enables the newly installed UPS board B to be connected.

For this reason, while continuing to supply power to load L from the existing UPS board B, a parallel test was conducted between the newly installed UPS board and the existing UPS board. The UPS board can be updated.

Furthermore, in this embodiment, the existing UPS board B1 is transferred from the supply path PS1 to the supply path PSx. It can be easily done in a short time.

[Modification]
(1) The number of supply paths PS, UPS boards B, and short-circuit boards SB is not limited to the numbers illustrated in the above embodiments. Also, the power equipment accommodated in the UPS board B is generally a converter and an inverter, but any one of the power equipment constituting the UPS may be accommodated. Also, this embodiment can be applied to a board that is not a UPS board.

(2) As shown in FIG. 25, the same enclosure-side connection as described above is also applied to peripheral boards such as the input transformer board 6, the storage battery board 7, the branch board 8, the external line terminal board O, the parallel board PB, and the maintenance bypass board MB. The replacement work may be facilitated by providing a portion 11 and connecting via a cable C or the like passing through the bus duct BD. In this case, the peripheral board can also be regarded as a heavy board.

(3) The number of housing-side connecting portions 11 may be singular or plural, and is not limited to the above aspect. The number of electrical connection portions opened and closed by one housing-side connection portion 11 may be plural or singular. For example, as shown in FIG. 26, a single housing-side connection portion 11 may be provided so that a large number of connection portions can be opened and closed by one operation.

(4) As shown in FIGS. 27 and 28, the housing-side connecting portion 11 may be provided on one or both of the side surfaces 10d and 10e of the housing 10, and the path-side connecting portion 21 may be arranged accordingly. . That is, the supporting portion 101 is provided on the side surfaces 10d and 10e of the housing 10 and is a plate-like member fixed in a direction parallel to the front surface 10b. As a result, even when there is not enough space in the upper portion, the connection and disconnection operations between the housing-side connection portion 11 and the path-side connection portion 21 can be performed from the front side in the same manner as described above. Also in this case, 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 portion 11 and path-side connection portion 21 becomes large, the R phase, S phase, and T phase of AC input, P, N of DC input, and R phase of bypass input , S phase, T phase, and AC output R phase, S phase, and T phase. These housing-side connecting portions 11 are spaced apart from each other to ensure an insulation distance. Further, the path-side connecting portions 21 are also arranged side by side with a space therebetween at positions corresponding to the housing-side connecting portions 11 to secure an insulation distance.

(5) In the above aspect, part of the housing-side connection part 11 is movable with respect to part of the path-side connection part 21, but even if part of the path-side connection part 21 is movable, the housing-side connection Both a portion of the portion 11 and a portion of the path-side connection portion 21 may be movable. The movable direction of the movable portion 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 crossing these straight lines. The movable path of the movable portion may be guided by the guide portion, and may be crank-shaped or curved.

(6) Each of the above-described embodiments and aspects is presented as an example in this specification and is not intended to limit the scope of the invention. That is, it can be embodied in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

Reference Signs List 1 Main body 2 Converter 3 Inverter 4 AC switch 6 Input transformer board 7 Storage battery board 8 Branch board 10 Housing 10a Upper surface 10b Front surface 10c Rear surface 10d, 10e Side surface 101 Support portion 101a Hole 11 Case-side connection portion 11a Conductor 11b Connection portion 11c Slide portion 111 Guide portion 111a Guide rail 111b Slider 112 Movable portion 112a Moving plate 112b Support plate 112c Guide groove 113 Operation portion Reference numerals 113a: biasing plate 113b: handle 21: path-side connection portion 211: fixed plate 212: terminal plate 213: connector portion 213a: concave portion 213b: contact electrode 52: circuit breaker F: installation area R1: main path R2: bypass path R3 Charging/discharging path M1 Rail portion M2 Eye bolt M3 Anchor M4 Lever block M5 Hand lift M6 Rectangular material B UPS panel I Input panel L Load O External line terminal board BS Base part PS Supply path CS … Power source MB … Maintenance bypass board BP … Bypass connection part PB … Parallel board PC … Parallel connection part

Claims (13)

a plurality of power supply paths;
a path-side connection section that is provided in each supply path and performs opening and closing of electrical connection with respect to the housing-side connection section supported by a board having a housing;
A region where the housing is installed, wherein at least one of a portion of the housing-side connection portion and a portion of the path-side connection portion of the housing installed in the region moves relative to the other. an installation area in which electrical connections can be opened and closed by
A switchable power supply system comprising: At least two of the supply paths are the boards, and at least a part of the power equipment constituting the UPS has a parallel connection part that connects the UPS boards accommodated in the housing in parallel. 2. The board exchange type power supply system according to claim 1. A switch that selectively switches the power supply source to any one of the UPS boards on the supply path, thereby allowing replacement of any other UPS board while continuing to supply power from the selected UPS board. 3. The board-exchangeable power supply system according to claim 2, further comprising a portion. By selectively switching the source of power to at least one UPS board of the at least three supply paths, the selected UPS board continues to supply power while any two other UPS boards 3. A board exchange type power supply system according to claim 2, characterized by having a switching unit which enables one to be exchanged and allows both to be tested in parallel. At least one of the supply paths includes
a short-circuit board in which a short-circuit member for short-circuiting the divided supply paths is accommodated in the housing;
The UPS board in which at least a part of the power equipment constituting the UPS is housed in the housing,
2. The switchable board power supply system according to claim 1, wherein the switchable power supply system is selectively connectable via the housing-side connecting portion and the path-side connecting portion. 5. A switching unit is provided for removing the UPS board of any other supply route while continuing to supply electric power through a supply route in which the short-circuit board is replaced with a newly installed UPS board. board exchange type power supply system. By replacing the short-circuit board with an existing UPS board removed from one of the supply routes, it is possible to connect a new UPS board to the supply route from which the existing UPS board was removed while continuing to supply power. 6. A board-exchangeable power supply system according to claim 5, further comprising a switching unit for . a plurality of power supply paths, a path-side connection section that opens and closes electrical connection with respect to a housing-side connection section provided in each supply path and supported by a board having a housing, and the housing. At least one of a portion of the housing-side connection portion and a portion of the path-side connection portion of the housing installed in the area is relatively moved with respect to the other, A panel update method for a power supply system having an installation area in which electrical connections can be opened and closed,
A panel connected to at least one supply path among the supply paths, and at least a part of the power equipment constituting the UPS continues to supply power by the UPS panel housed in the housing,
A board update method for a power supply system, comprising removing an existing UPS board from at least one other supply route among the supply routes. 9. The power supply system panel update method according to claim 8, wherein after removing an existing UPS panel from said at least one other supply path, a newly installed UPS panel is connected. while continuing to be supplied with power by a UPS board connected to at least one supply path;
9. The power supply system according to claim 8, wherein after removing one of the existing UPS boards connected to at least two other supply paths, it is replaced with a new UPS board, and both are tested in parallel. Board update method. replacing a short-circuit board connected to at least one supply route and housing a short-circuit member for short-circuiting the divided supply route with a newly installed UPS board;
9. The board update method for a power supply system according to claim 8, wherein the existing UPS board is removed from said at least one other supply path while continuing power supply by said newly installed UPS board. A UPS board that is connected to at least one supply path and that has a short-circuiting member that short-circuits the divided supply paths housed in the housing, and is connected to at least two supply paths that supply power in parallel. Among them, replace with one of the existing UPS boards,
Claim 8, characterized in that the new UPS board is connected to the supply path from which the existing UPS board replaced with the short circuit board has been removed, while continuing to supply electric power by the existing UPS board replaced with the short circuit board. A board update method for the described power supply system. 2. A board connectable to at least one of the supply paths in the board-exchangeable power supply system according to claim 1, wherein a short-circuiting member for short-circuiting the divided supply paths is accommodated in the housing. A short-circuit board characterized by a

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