JP2009284708A - Switchboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the whole switchboard has to be powered off for ensuring safety when cable replacement is needed due to a ground fault in one breaker in a switchboard in a multiple stack. <P>SOLUTION: The switchboard 1 has a breaker chamber 4 formed by partitioning the inside of a switchboard frame 2 with a partition wall 3 and a conductor chamber 5. The inside of the breaker chamber 4 is further divided into three breaker chambers 4a, 4b and 4c, and the breaker 8 is housed in each chamber. The power supply side contacts 9 for the breaker 8 and load-side contacts 10 are brought into a non-contact state with a power supply side disconnecting section 11 and a load-side disconnecting section 12 fitted to the partition wall 3 when the breaker 8 is led out, and both contacts are brought into a contact state and connected to load-side conductors 13a to 13c in the conductor chamber 5 and cables 14 through the load-side disconnecting section 12 when the breaker 8 is pushed into the chamber. The load-side conductors for each breaker 8 and the cables are arranged along each surface of the conductor chamber 5, and these cables or the like are covered with an openable-closeable cover 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a switchboard that accommodates a plurality of circuit breakers, and in particular, when repairing or replacing a load-side conductor or cable of one circuit breaker, the load-side conductor or cable can be repaired without powering off the other circuit breaker. The replacement work can be performed safely.

  As a switchboard containing a plurality of circuit breakers, a switchboard shown in FIG. 7 is known. The switchboard 101 is divided into a box-like board frame 102 into a machine room 103 on the front side and a conductor room 104 on the back side. In the machine room 103, drawer type circuit breakers 105 are arranged in multiple stages in the vertical direction. ing. Further, at the boundary between the machine room 103 and the conductor room 104, there are provided power supply side and load side disconnecting parts 106 and 107 which are attached to and detached from the connection terminals of the respective circuit breakers 105. On the other hand, a horizontal bus 108 and a vertical bus 109 connected thereto are provided in the conductor chamber 104, and a cable 110 is introduced from the floor of the panel frame 102 behind the buses 108 and 109.

  The vertical bus 109 is connected to a power supply-side disconnection section 106, and the cable 110 is connected to a load-side disconnection section 107 via a load-side connection conductor (hereinafter referred to as load-side conductor) 111. Further, a zero-phase transformer 112 is provided in the middle of each cable 110, and a current transformer 113 is provided in the middle of the load-side conductor 111. Reference numeral 114 denotes a connection terminal that connects the cable 110 and the load side conductor 111, and 115 denotes a cable support that supports the cable 110. (For example, refer to Patent Document 1 and Patent Document 2).

  The zero-phase transformer 112 and the current transformer 113 need to be inspected regularly because their characteristics deteriorate due to aging. The inspection must be performed inside the panel frame 102, and in order to ensure safety, it is necessary to power out the entire distribution panel, resulting in a large economic loss.

  Therefore, in order to enable safe maintenance and inspection of the zero-phase transformer 112 and the current transformer 113 without causing a power failure of the entire switchboard, as shown in FIG. The switchboard switch units 203 are accommodated in multiple stages along the vertical direction, the doors 204 on the front side of the panel frame 202 are opened, and then the switchboard switch units 203 for the switchboards are pulled out along the rails 205. The switchboard 201 has been developed.

  In the switchboard 201, as shown in FIG. 8B, the switchboard switch unit 203 has a cross-section H composed of a pair of left and right side plates 206 arranged opposite to each other and a shelf plate 207 that connects the side plates 206 to each other. The main circuit 209 is arranged on the upper surface side of the shelf plate 207 of the frame 208, and the control device unit 210 for controlling the main circuit 209 is arranged on the lower surface side.

The switchboard 201 draws the entire switchboard switch unit 203 from the panel frame 202 to the front side, so that the power supply side and load side junctions 211 and 212 are provided on the panel frame 202 and are not shown. Therefore, it is possible to easily perform maintenance and inspection of each device without causing a power failure of the entire switchboard. (For example, refer to Patent Document 2).
JP-A-54-69738 (lower left column, line 1 to page 3, left column, line 8) JP 2003-189422 A (paragraphs 0003 to 0007, paragraph 0018, paragraph 0020, paragraph 0023, etc.)

  By the way, as described above, the conventional drawer type switchboard 201 pulls out the entire switchboard switch unit 203 to the front side so that the junctions 211 and 212 on the power supply side and the load side are separated from the bus and the cable. Therefore, maintenance and inspection of the main circuit 209 and the control device unit 210 can be easily performed without powering down the entire switchboard. However, when it is necessary to replace the cable due to the maintenance, inspection or ground fault of the load side conductor or cable, the work is performed in the same space in the conductor room of the panel frame as in the case of the switchboard 101 shown in FIG. In order to ensure safety, it was necessary to power out the entire switchboard.

  The purpose of the present invention is only a circuit breaker that requires maintenance, inspection, etc. without causing a power failure of the entire switchboard when cable replacement is required due to maintenance, inspection, or ground fault of the load side conductor or cable. It is to provide a switchboard that can perform work safely.

  According to the first aspect of the present invention, the breaker chamber and the conductor chamber are formed by dividing the interior of the box-shaped board frame by a partition wall in the vertical direction, and the breaker chamber is further divided into a plurality of breaker chambers by dividing walls. In the switchboard in which the circuit breakers are housed in the divided circuit breaker chambers, and the load side conductors and cables arranged in the conductor chambers are connected to the load sides of the circuit breakers, the load side of each circuit breaker The conductors and cables were distributed and arranged on each inner surface of the conductor chamber, and the load-side conductors and cables of the circuit breakers were covered with a cover that can be opened and closed.

  According to a second aspect of the present invention, in the switchboard according to the first aspect, the circuit breaker chamber is divided into a plurality of circuit breaker chambers that are vertically arranged by horizontal dividing walls.

  According to a third aspect of the present invention, in the switchboard according to the first aspect, the circuit breaker chamber is divided into a plurality of circuit breaker chambers arranged in rows in the horizontal direction by vertical dividing walls.

  Invention of Claim 4 is the switchboard in any one of Claims 1-3, The 1st cover which covers the load side conductor and cable which are arrange | positioned along the inner surface of the partition wall of the said conductor chamber in the said cover And second and third cover portions that cover the load-side conductors and the cables disposed along the inner surfaces of the pair of side walls of the board frame facing each other with the partition wall interposed therebetween.

  According to a fifth aspect of the present invention, in the switchboard according to the fourth aspect, the first to third cover portions are attached in the conductor chamber so as to be rotatable by a shaft.

  According to a sixth aspect of the present invention, in the switchboard according to the fifth aspect, the first cover portion is substantially omitted from a state in which the first cover portion covers the load-side conductor and the cable disposed along the inner surface of the partition wall of the conductor chamber. When rotated by 90 °, the load side conductor and the cable arranged along the inner surface of the partition wall of the conductor chamber are exposed to overlap the second or third cover portion, and the second cover portion is When the load-side conductor and the cable disposed along the inner surface of one of the pair of side walls are rotated approximately 90 ° from the state of covering the cable, the first cover portion overlaps the first cover portion. The load-side conductor and cable arranged along the inner surface are exposed, and the third cover portion is arranged along the inner surface of the other side wall of the pair of side walls. When it is turned approximately 90 ° from the state of covering the cable, the load side conductor and the cable arranged along the inner surface of the other side wall are exposed to overlap the first cover portion.

  The invention according to claim 7 is the switchboard according to any one of claims 1 to 3, wherein the cover portion is configured by first and second cover portions attached in the conductor chamber so as to be rotatable by a shaft, 90 degrees from the state which covers the load side conductor and cable which are arrange | positioned along the inner surface of one side wall of one side wall of the board | plate frame which opposes the said 1st cover part on both sides of the said partition wall When rotated, the load side conductor and the cable arranged along the inner surface of the one side wall are exposed, and the load side conductor and the cable arranged along the inner surface of the partition wall are covered. In addition, when the second cover portion is rotated by approximately 90 ° from the state covering the load-side conductor and the cable disposed along the inner surface of the other side wall of the pair of side walls, Side wall The load side conductor and the cable arranged along the inner surface are exposed, and the load side conductor and the cable arranged along the inner surface of the partition wall are covered.

  According to an eighth aspect of the present invention, in the distribution board according to any one of the first to seventh aspects, the cover is maintained in an open state or a closed state by a stopper.

  The invention according to claim 9 is the switchboard according to any one of claims 1 to 8, wherein the cover is grounded.

(1) The switchboard according to claim 1 exposes only the load-side conductor and cable that require repair of the load-side conductor and cable, and keeps the other load-side conductor and cable covered with a cover. Therefore, it is possible to perform a repair or the like safely by powering only the circuit breaker that requires repair without causing a power failure of the entire switchboard.
(2) In the switchboard according to claim 2, the circuit breaker chamber is divided into a plurality of circuit breaker chambers that are stepped in the vertical direction (vertical direction) by horizontal dividing walls. It can be accommodated in the state.
(3) In the switchboard according to the third aspect, since the breaker chamber is divided into a plurality of breaker chambers arranged in a row in the horizontal direction by vertical dividing walls, the plurality of breakers are arranged at the same height. Can be accommodated.
(4) The switchboard according to the fourth aspect of the present invention is the circuit breaker distributed and arranged along the inner surfaces of a total of three surfaces of the partition wall of the conductor chamber and a pair of side walls of the panel frame facing each other across the partition wall. The load-side conductor and cable are covered with the first to third cover parts, and the load-side conductor and cable cover that is required for repair is opened, and the load-side conductor and cable are exposed. And repairs can be performed safely.
(5) The switchboard according to claim 5 covers or exposes the load-side conductors and cables of each circuit breaker by rotating the first to third cover portions around the shaft to open and close these cover portions. You can make it.
(6) When the first to third cover parts are opened, the opened cover part overlaps the front side of the other cover part, so that the opened cover part interferes with repair work. To prevent.
(7) The switchboard according to claim 7 is the first cover portion of each circuit breaker disposed along the inner surface of one of the pair of side walls of the board frame facing each other across the partition wall of the conductor chamber. A load-side conductor that covers the load-side conductor and the cable, covers the load-side conductor and the cable of the circuit breaker disposed along the inner surface of the other side wall, and is disposed along the inner surface of the partition wall. In addition, since the cable is exposed, when repairing the load-side conductor and the cable arranged along the inner surface of the partition wall, the repair is performed as it is. Further, when repairing the load-side conductor and cable of the circuit breaker arranged along the inner surfaces of the pair of side walls, the cover portion covering the load-side conductor and cable that needs repair is rotated by approximately 90 °. The load-side conductor and the cable that need repair can be exposed, and the load-side conductor and the cable arranged along the inner surface of the partition wall can be covered to perform repair or the like safely.
(8) The switchboard according to the eighth aspect can maintain the cover in an open state or a closed state by a stopper to prevent the cover portion from being opened or closed during work such as repair.
(9) Since the switchboard according to the ninth aspect grounds the cover, an electric shock accident during work can be suppressed.

  1 to 2 show a first embodiment of a switchboard 1 according to the present invention, FIG. 1A is a schematic cross-sectional view of the switchboard 1, FIG. 1B is a schematic side view, and FIG. C) is a schematic plan view. As shown in FIG. 1 (A), the switchboard 1 divides the inside of a box-shaped board frame 2 by a vertical partition wall 3 to form a circuit breaker chamber 4 and a conductor chamber 5. Is further divided into three upper, middle and lower circuit breaker chambers 4a, 4b and 4c by horizontal dividing walls 6 and 7, and circuit breakers 8 can be taken in and out of these three circuit breaker chambers 4a, 4b and 4c, respectively. Is housed in. When the circuit breaker 8 is pulled out from the circuit breaker chambers 4 a, 4 b, 4 c, the power source side disconnecting part 11 in which the power source side contactor 9 and the load side contactor 10 of the circuit breaker 8 are provided on the partition wall 3. When the circuit breaker 8 is pushed into the circuit breaker chambers 4a, 4b and 4c, the power supply side contactor 9 and the load side contactor 10 are brought into contact with the power supply side disconnection part 11. The load side disconnection part 12 is brought into contact with the load side disconnection part 12 and connected to the load side conductors 13a to 13c and the cables 14a to 14c disposed in the conductor chamber 5 via the load side disconnection part 12. Reference numeral 15 denotes a door of the circuit breaker chambers 4 a, 4 b, 4 c, and 16 denotes a door of the conductor chamber 5. Reference numerals 15a and 16a denote knobs of the doors 15 and 16, respectively.

  In the conductor chamber 5, in addition to the load side conductors 13a to 13c and the cables 14a to 14c, a horizontal bus bar 17, a vertical bus bar 18 and the like are arranged. The horizontal bus 17 is disposed in the horizontal direction along the inner surface of the partition wall 3 at the upper end of the conductor chamber 5, that is, at the upper portion of the partition wall 3 facing the door 16. Further, the vertical bus 18 is arranged in the vertical direction along the inner surface of the partition wall 3, one end side is connected to the horizontal bus bar 17, and the other end side is connected to the power supply side disconnection portion 11 of each circuit breaker 8. . The power supply side disconnecting part 11 is connected to and separated from the power supply side contactor 9 of the circuit breaker 8. As described above, the load-side disconnecting portion 12 of each circuit breaker 8 is connected to the cables 14a to 14c via the load-side conductors 13a to 13c.

  Of the three upper, middle and lower circuit breaker chambers 4a, 4b and 4c, the load side conductor 13b of the middle circuit breaker chamber 4b is divided as shown in FIGS. 1 (B) and 1 (C). It is pulled out along the inner surface of the wall 3, and the cable 14b is connected to the connecting portion 19b at the tip. The cable 14b is introduced into the conductor chamber 5 from the cable introduction hole 20 of the board frame 2 provided almost directly below the connection portion 19b.

  The load-side conductor 13a connected to the load-side disconnecting portion 12 of the upper circuit breaker chamber 4a extends along one side wall 2a of the pair of side walls 2a and 2b of the panel frame 2 facing each other across the partition wall 3. The cable 14a is connected to a connecting portion 19a provided at the distal end portion. The cable 14a is introduced into the conductor chamber 5 from the cable introduction hole 20 of the board frame 2 provided almost directly below the connection portion 19a.

  The load-side conductor 13c connected to the load-side disconnecting portion 12 of the lower circuit breaker chamber 4c is drawn out along the inner surface of the other side wall 2b, and the cable 14c is connected to the connecting portion 19c provided at the distal end portion. Is connected. The cable 14c is introduced into the conductor chamber 5 from the cable introduction hole 20 of the board frame 2 provided almost directly below the connection portion 19c.

  The load-side conductors 13a to 13c and the cables 14a to 14c of the circuit breaker chambers 4a, 4b, and 4c arranged in a distributed manner along the inner surfaces of the partition wall 3 and the pair of side walls 2a and 2b, respectively, Are covered with a cover 21 that can be opened and closed individually.

  The cover 21 includes a connecting portion 19b disposed along the inner surface of the partition wall 3, a first cover portion 22 covering the load-side conductor 13b and the cable 14b connected by the connecting portion 19b, and the pair of side walls. 2a, 2b, a second cover portion 23 covering the connecting portion 19a disposed along the inner surface of one side wall 2a, the load-side conductor 13a and the cable 14a connected by the connecting portion 19a, and the other side wall The connection part 19c arrange | positioned along the inner surface of 2b, the load side conductor 13c connected by this connection part 19c, and the 3rd cover part 24 which covers the cable 14c are comprised.

  As shown in FIG. 1C, the first to third cover portions 22 to 23 are connected to the connection portions 19a to 19c, the load-side conductors 13a to 13c and the cables 14a to 14c connected by the connection portions 19a to 19c. It is arranged in a substantially U shape further inside 14c.

  The first to third cover portions 22 to 24 are attached to the conductor chamber 5 so as to be rotatable by a shaft 25.

  As shown in FIG. 1C, the first cover portion 22 includes a connecting portion 19b disposed along the inner surface of the partition wall 3, and a load-side conductor 13b and a cable 14b connected by the connecting portion 19b. From the state of covering the shaft 25, when rotated about 90 ° in the direction of arrow A about the shaft 25, as shown in FIG. 2A, the partition wall 3 overlaps with the second cover portion 23. The connection portion 19b disposed along the inner surface of the wire, the load side conductor 13b connected by the connection portion 19b, and the cable 14b are exposed.

  As shown in FIG. 1 (C), the second cover portion 23 includes a connection portion 19a disposed along the inner surface of one side wall 2a of the panel frame 2 and a load connected by the connection portion 19a. When the side conductor 13a and the cable 14a are covered and rotated by about 90 ° in the direction of arrow B, as shown in FIG. 2B, the first cover portion 22 is overlapped with the one side wall 22a. The connecting portion 19a disposed along the inner surface, the load-side conductor 13a connected by the connecting portion 19a, and the cable 14a are exposed.

  As shown in FIG. 1C, the third cover portion 24 includes a connecting portion 19c disposed along the inner surface of the other side wall 2b, and a load-side conductor 13c connected by the connecting portion 19c. When the cable 14c is covered and is rotated by approximately 90 ° in the direction of arrow C, as shown in FIG. 2C, the first cover portion 22 is overlapped along the inner surface of the other side wall 2b. The arranged connection portion 19c and the load side conductor 13c and the cable 14c connected by the connection portion 19c are exposed.

  The first to third cover portions 22 to 24 are maintained in a closed state in which the load-side conductor and the cable are covered or an open state in which the load-side conductor and the cable are exposed by a stopper (lock device) (not shown). The The first to third cover portions 22 to 24 are grounded to prevent an electric shock accident.

  The switchboard according to the first embodiment is configured as described above, and includes only the cover portion covering the load side conductor and the cable that need repair in the first to third cover portions 22 to 24. By opening and closing the other cover part, it is possible to perform a repair safely by powering only the circuit breaker requiring repair without powering the entire switchboard.

  FIG. 3 shows a second embodiment of the switchboard 1 of the present invention. In this embodiment, the cover 31 is composed of first and second cover portions 32 and 33. The first and second cover portions 32 and 33 are attached in the conductor chamber 5 so as to be rotatable by a shaft 34.

  As shown in FIG. 3 (A), the first cover portion 32 includes a connecting portion 19a disposed along the inner surface of one side wall 2a of the panel frame 2 and a load connected by the connecting portion 19a. When the side conductor 13a and the cable 14a are covered, the connecting portion is disposed along the inner surface of the one side wall 2a as shown in FIG. 19a and the load side conductor 13a and the cable 14a connected by the connecting portion 19a are exposed, while the connecting portion 19b disposed along the inner surface of the partition wall 3 and the load connected by the connecting portion 19b The side conductor 13b and the cable 14b are covered.

  Further, as shown in FIG. 3A, the second cover portion 33 is connected by a connection portion 19c disposed along the inner surface of the other side wall 2b of the panel frame 2 and the connection portion 19c. As shown in FIG. 3C, when the load side conductor 13c and the cable 14c are covered, they are arranged along the inner surface of the other side wall 2b as shown in FIG. The connecting portion 19c and the load side conductor 13c connected by the connecting portion 19c and the cable 14c are exposed, while being connected by the connecting portion 19b and the connecting portion 19b arranged along the inner surface of the partition wall 3. The load side conductor 13b and the cable 14b are covered. Other configurations are the same as in the case of the first embodiment, and a duplicate description is omitted.

  The switchboard of the second embodiment is configured as described above, and includes a connecting portion 19a disposed along the inner surface of one side wall 2a of the board frame 2 at the first cover portion 32, and the connecting portion 19a. The load side conductor 13a and the cable 14a that are connected are covered, and the second cover portion 33 is connected by the connection portion 19c disposed along the inner surface of the other side wall 2b of the panel frame 2 and the connection portion 19c. When the load-side conductor 13b and the cable 14b are repaired because they cover the load-side conductor 13c and the cable 14c and expose the load-side conductor 13b and the cable 14b disposed along the inner surface of the partition wall 3. Includes a load-side conductor 13b and a cable that are safely disposed along the inner surface of the partition wall 3 without opening and closing the first and second cover portions 32 and 33. It is possible to perform the repair of Le 14b.

  When repairing the load-side conductor 13a and the cable 14a, the first cover portion 32 is rotated by approximately 90 ° in the direction of arrow A in FIG. And the load side conductor 13a and the cable 14a connected by the connecting portion 19a are exposed, and the first cover portion 32 is arranged along the inner surface of the partition wall 3. By covering the connecting portion 19b and the load side conductor 13b and the cable 14b connected by the connecting portion 19b, the cable 14a disposed along the inner surface of the one side wall 2a is repaired safely. be able to.

  When repairing the load-side conductor 13c and the cable 14c, the second cover portion 33 is rotated by approximately 90 ° in the direction of arrow B in FIG. As described above, the connection portion 19c disposed along the inner surface of the other side wall 2b, the load-side conductor 13c connected by the connection portion 19c, and the cable 14c are exposed, and the second cover portion 33 By covering the connection portion 19b disposed along the inner surface of the partition wall 3 and the load side conductor 13b and the cable 14b connected by the connection portion 19b, the load side conductor 13c and the cable 14c can be repaired safely. It can be carried out.

  FIG. 4 shows a third embodiment of the switchboard 1 of the present invention. In this embodiment, the breaker chamber 42 and the conductor chamber 43 are formed by dividing the inside of the box-shaped board frame 2 by a vertical partition wall 41, and the inside of the breaker chamber 42 is further divided in the vertical direction by a partition wall 44. , 45 and divided into three circuit breaker chambers 42a, 42b, 42c arranged in the horizontal direction, and each of the three circuit breaker chambers 42a, 42b, 42c accommodates a circuit breaker (not shown) in a removable manner. Show.

  In the case of the third embodiment, the circuit breakers 8 in the circuit breaker chambers 42a, 42b, 42c can be accommodated at the same height position. In FIG. 4, the partition wall 41 and the partition walls 44 and 45 are shown as separate members. However, as shown in FIG. 5, the partition wall 41 and the partition wall 44 are formed using a single metal plate or the like. 45 may be formed integrally. Other configurations are the same as those in the first and second embodiments, and thus a duplicate description is omitted.

  FIG. 6 shows a fourth embodiment of the switchboard 1 of the present invention. In this embodiment, the inside of the box-shaped board frame 2 is divided into first and second circuit breaker chambers 52 and 53 and a conductor chamber 54 by a partition wall 51 formed in a Y shape or a V shape. This shows the case of partitioning.

  The load-side conductor and cable of the circuit breaker housed in the first circuit breaker chamber 52 (in FIG. 6, the connecting portion 55 for connecting the load-side conductor and the cable is displayed) is Y-shaped or V-shaped. It arrange | positions along the inner surface of one inclined surface 51a of the partition wall 51 formed in the letter shape. Further, the load-side conductor and cable of the circuit breaker accommodated in the second circuit breaker chamber 53 (in FIG. 6, the connection portion 56 for connecting the load-side conductor and the cable is displayed) is the Y-shape. Or it arrange | positions along the inner surface of the other inclined surface 51b of the partition wall 51 formed in V shape.

  The load-side conductor and cable of the circuit breaker of the first circuit breaker chamber 52 connected by the connecting portion 55, and the load-side conductor and cable of the circuit breaker of the second circuit breaker chamber 52 connected by the connecting portion 56. Is opened and closed by a cover 57.

  One end of the cover 57 is pivotally attached to a base portion of one inclined surface 51a and the other inclined surface 51b of the partition wall 51 by a shaft 58. Then, as shown by the solid line in FIG. 6, the cover 57 is covered from the state in which the load side conductor and the cable of the circuit breaker of the first circuit breaker chamber 52 arranged along the inner surface of the one inclined surface 51a are covered. Is rotated by a predetermined angle in the direction of arrow A, as shown by a two-dot chain line, the load side conductor and the cable of the circuit breaker of the second circuit breaker chamber 53 are covered. Other configurations are the same as those in the first to third embodiments, and thus a duplicate description is omitted. In each of the above embodiments, the case where the cover portion is rotated is shown as a method for opening and closing the cover portion. However, the cover portion may be slid, or the cover portion may be opened and closed by using both sliding and rotation. .

(A) is schematic sectional drawing of the switchboard of 1st Example, (B) is schematic side view, (C) is schematic plan view. (A), (B), (C) is explanatory drawing which shows an effect | action. (A), (B), (C) is explanatory drawing which shows the effect | action of the switchboard of 2nd Example. Explanatory drawing of the switchboard of 3rd Example. Explanatory drawing which shows the modification of the switchboard of 3rd Example. Explanatory drawing of the switchboard of 4th Example. (A), (B) is explanatory drawing of a prior art example. (A), (B) is explanatory drawing of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Distribution board 2 ... Board frame 3 ... Partition wall 4 ... Circuit breaker room 4a, 4b, 4c ... Divided circuit breaker room 5 ... Conductor room 6, 7 ... Dividing wall 8 ... Circuit breaker 9 ... Power supply side contactor 10 ... Load side contact 11 ... Power supply side disconnection part 12 ... Load side disconnection part 13a-13c ... Load side conductor 14a-14c ... Cable 15,16 ... Door 17 ... Horizontal bus 18 ... Vertical bus 19a-19c ... Connection 20 ... Cable Introduction hole 21 ... Cover 22 ... First cover part 23 ... Second cover part 24 ... Third cover part 25 ... Shaft 31 ... Cover 32 ... First cover part 33 ... Second cover part 34 ... Shaft

Claims (9)

The inside of the box-shaped board frame is partitioned by a partition wall in the vertical direction to form a circuit breaker chamber and a conductor chamber, and the circuit breaker chamber is further divided into a plurality of circuit breaker chambers by dividing walls, and these divided circuit breaker chambers In the switchboard in which the load side conductors and cables arranged in the conductor chamber are connected to the load side of each of the circuit breakers, respectively,
The load-side conductors and cables of each of the circuit breakers are distributed and arranged on the respective inner surfaces of the conductor chamber, and the load-side conductors and cables of the circuit breakers are covered with an openable / closable cover. A switchboard characterized by that. 2. The switchboard according to claim 1, wherein the circuit breaker chamber is divided into a plurality of circuit breaker chambers that are stepped in a vertical direction by horizontal dividing walls. 2. The switchboard according to claim 1, wherein the circuit breaker chamber is divided into a plurality of circuit breaker chambers arranged in a row in a horizontal direction by vertical dividing walls. The cover is provided along a first cover portion covering a load-side conductor and a cable disposed along an inner surface of the partition wall of the conductor chamber, and an inner surface of a pair of side walls of the panel frame facing each other with the partition wall interposed therebetween. The switchboard according to any one of claims 1 to 3, comprising a load-side conductor and a second and third cover portions that cover the cable and the cable. The switchboard according to claim 4, wherein the first to third cover parts are attached to the conductor chamber so as to be rotatable by a shaft. The first cover portion overlaps the second or third cover portion when rotated approximately 90 ° from the state of covering the load-side conductor and the cable disposed along the inner surface of the partition wall of the conductor chamber. Exposing the load-side conductor and the cable disposed along the inner surface of the partition wall of the conductor chamber,
The second cover portion overlaps the first cover portion when rotated approximately 90 ° from the state of covering the load-side conductor and the cable disposed along the inner surface of one of the pair of side walls. Exposing the load-side conductor and the cable disposed along the inner surface of the one side wall;
The third cover part overlaps the first cover part when rotated approximately 90 ° from the state of covering the load-side conductor and the cable disposed along the inner surface of the other side wall of the pair of side walls. The switchboard according to claim 5, wherein a load-side conductor and a cable disposed along the inner surface of the other side wall are exposed. The cover includes first and second cover portions attached in the conductor chamber so as to be rotatable by a shaft.
The first cover portion is approximately 90 ° from a state where it covers a load-side conductor and a cable arranged along the inner surface of one of the pair of side walls of the panel frame facing each other across the partition wall. When rotating, the load side conductor and the cable arranged along the inner surface of the one side wall are exposed, while the load side conductor and the cable arranged along the inner surface of the partition wall are covered,
When the second cover portion is rotated approximately 90 ° from the state of covering the load-side conductor and the cable disposed along the inner surface of the other side wall of the pair of side walls, The load-side conductor and cable arranged along the inner surface of the partition wall are covered while the load-side conductor and cable arranged along the inner surface are exposed. Switchboard described in 1. The switchboard according to any one of claims 1 to 7, wherein the cover is maintained in an open state or a closed state by a stopper. The switchboard according to claim 1, wherein the cover is grounded.

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