JP6352055B2 - Switchgear - Google Patents

Description

  The present invention relates to a switchgear, and more particularly, to a switchgear that can be stacked and mounted with a drawer type circuit breaker and can cope with a change in the direction of cable drawing.

  As prior art documents related to the switchgear, there is one described in Patent Document 1. This Patent Document 1 describes a closed switchboard having a circuit breaker chamber in which circuit breakers are arranged in two upper and lower stages, and a current transformer mounting bracket separates the bus bar room from the cable processing chamber, and a current transformer mounting bracket. Discloses a configuration that has a lever for fixing the conductor and can draw the cable up and down.

JP-A-8-280107

  By the way, the switchgear may be pulled up or down depending on the customer's installation environment, and it is necessary to cope with each.

  However, in an air-type switchgear that can be stacked in a stacking configuration with a conventional pull-out type circuit breaker, the shape of the conductor must be changed greatly according to the direction in which the cable is pulled out, and the parts cannot be shared. It was.

  Moreover, although the above-mentioned Patent Document 1 describes the configuration in which the circuit breakers are arranged in two upper and lower stages and the cable can be drawn up and down, it is common to share components according to the direction in which the cable is drawn out. Is not described at all.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a switch that does not require a large change in the shape of the conductor in accordance with the direction in which the cable is pulled out, and can be used in common to improve the workability Is in providing gear.

In order to achieve the above object, the switchgear according to the present invention includes a housing, a drawer type circuit breaker that is housed in the housing and is arranged at the top and bottom for turning on and off the current, and a current to each panel. A busbar to be supplied, a busbar partition plate installed on the opposite side of the pull-out type circuit breaker with respect to the busbar, a conductor fixing insulator supported by the busbar partition plate, and a conductor fixing insulator The upper and lower conductors that are supported and supply current to the load, and the cables that are connected to the upper and lower conductors and that can be pulled out in the vertical direction, and that correspond to the pull-out direction of the cable. The position is configured to be movable, and the bus bar, bus bar room partition plate, conductor fixing insulator, upper and lower conductors are arranged according to the moving position of the draw-out type circuit breaker, and the bus bar is different from the phase. Three phases are arranged in the height direction with an interval. Each is attached to an insulator mounting bracket via a busbar fixing insulator, and the insulator mounting bracket is fixed to the busbar chamber partition plate, and the busbar chamber partition plate is fixed to both side surfaces of the housing. and said that you are.

  According to the present invention, it is not necessary to greatly change the shape of the conductor according to the direction in which the cable is drawn out, and the parts can be shared, so that workability is improved.

It is Example 1 of the switchgear of this invention, and is a side view which shows the state which pulled out the cable from the bottom. It is Example 1 of the switchgear of this invention, and is a side view which shows the state which pulled out the cable from the top. It is the top view and side view which expand and show the bus-line part in Example 1 of the switchgear of this invention. It is Example 1 of the switchgear of this invention, and is an enlarged view of the upper stage conductor part at the time of pulling out a cable from the bottom . A first embodiment of the switchgear present invention, is an enlarged view of the lower stepped conductor portion when pulled out cable from below.

  Hereinafter, the switchgear of the present invention will be described based on the illustrated embodiments. In each figure, the same symbols are used for the same components.

  1 to 5 show a first embodiment of the switchgear of the present invention.

  As shown in FIGS. 1 and 2, the switchgear of the present embodiment is housed in a housing 13 having a front door 12 and a rear door 14, and is supported by the front partition plate 1. Upper drawer type circuit breaker 11A and lower drawer type circuit breaker 11B for turning on and off current, bus 9 for supplying current to each row board, upper drawer type circuit breaker 11A and lower drawer type circuit breaker for bus 9 Busbar partition plate 3 installed on the opposite side of the vessel 11B, the conductor fixing insulator 6 supported by the busbar partition plate 3, and the upper stage which is supported by the conductor fixing insulator 6 and supplies current to each load. The conductor 4 and the lower-stage conductor 5 and the cables 15 and 16 connected to the upper-stage conductor 4 and the lower-stage conductor 5 and capable of being drawn out in the vertical direction are schematically configured.

  In this embodiment, the positions of the upper drawer type circuit breaker 11A and the lower drawer type circuit breaker 11B can be moved up and down in accordance with the drawing direction of the cables 15, 16 (from the top or from the bottom). The bus bar 9, the bus bar partition plate 3, the conductor fixing insulator 6, the upper conductor 4 and the lower conductor 5 are arranged in accordance with the movement position of the upper drawer type circuit breaker 11A and the lower drawer type circuit breaker 11B. It is characterized by. Details will be described below.

  First, the bus bar will be described with reference to FIG.

  As shown in the figure, the bus 9 is arranged in three phases in the height direction with an interval so as to ensure insulation from different phases, and is attached to the insulator mounting bracket 17 by the busbar fixing insulator 7. . The insulator mounting bracket 17 is fixed to the bus bar partition plate 3. The busbar chamber partition plate 3 is fixed to both side surfaces of the housing 13.

  In the present embodiment, the bus bar partition plate 3 is a frame-like body, and the bus bar 9 is visible when viewed from the back side of the housing 13 (the left side in FIG. 1 and FIG. 2). In addition, the bus-bar chamber partition plate 3 may be a plate-like body in which the inside of the frame is buried instead of the frame-like body from the viewpoint of improving safety.

  Moreover, the bus-bar chamber partition plate 3 has a bent portion at the tip opposite to the side on which the insulator mounting bracket 17 is fixed, thereby improving the strength. The bus 9 of each phase has a role to be fed from the system side or the like, but extends in a substantially horizontal direction and is connected to the in-phase bus of the adjacent switch gear. Further, the bus 9 of each phase is connected to the branch conductor 8 of each phase on the side opposite to the bus-fixing insulator 7, in other words, on the front side of the board (the right side in FIG. 1 and FIG. 2). It is connected to an upper drawer type circuit breaker 11A and a lower drawer type circuit breaker 11B through a bushing 10 connected to the branch conductor 8.

  Further, the bushing 10 is disposed through the disconnection part partition plate 2 in the front-rear direction, the branch conductor 8 is connected to the bushing 10 at the top and bottom, and each of the upper and lower bushings 10 is respectively connected to the upper drawer type circuit breaker 11A. And the lower drawer type circuit breaker 11B.

  Although details of the upper drawer type circuit breaker 11A and the lower stage type circuit breaker 11B are omitted, for example, a vacuum interrupter or the like is arranged, and can be turned on and off. Bushings that are taken out from the other end side through the vacuum interrupter are arranged in the front-rear direction of the disconnection partitioning plate 2 and are connected to the upper conductor 4 and the lower conductor 5, respectively. The upper conductor 4 and the lower conductor 5 are supported by the conductor fixing insulator 6 and connected to the cables 15 and 16. The upper and lower conductor fixing insulators 6 are provided in bent portions provided in the busbar chamber partition plate 3.

  By the way, the upper conductor 4 and the lower conductor 5 generate a large electromagnetic force when energized for a short time. Therefore, in order to withstand this electromagnetic force, conventionally, it has been fixed to the ceiling of the housing using a bolt or the like via an insulator. In addition, this fixing position has been changed according to the direction of drawing out the cable. However, other fixing members such as bolts are also provided on the ceiling of the panel, and there is a possibility that the operator may accidentally remove the insulator. In order not to accidentally remove the insulator, it is necessary to take measures such as using special bolts, etc. so that it cannot be easily removed.

  On the other hand, in the present embodiment, the upper and lower conductor fixing insulators 6 are provided in the bent portions provided in the bus bar room partition plate 3. Thus, unlike a conventional ceiling or the like, no other fixing member is arranged, so that the operator does not mistakenly remove the fixing member. Moreover, since it is originally located inside the board, it is unlikely to be accidentally removed.

  Further, in the present embodiment, the upper and lower conductor fixing insulators 6 are particularly provided at the bent portions provided on the bus bar room partition plate 3. By providing each conductor fixing insulator 6 at a location where the strength is improved by providing the bent portion, it is possible to withstand energization for a short time.

  Further, by not using the ceiling or the like as in the present embodiment, the upper conductor 4 or the cable 15 or 16 shown in FIGS. 1 and 2 can be pulled out in either the upper or lower direction. There is no need to change the shape of the lower conductor 5 itself.

At the time of attachment , it is necessary to change the direction of the connection portion of the upper conductor 4 and the lower conductor 5 to the cables 15 and 16 (although it is bent in the drawing direction as shown). However, this is merely a change in direction and does not change the shape of the upper conductor 4 or the lower conductor 5 itself.

In this embodiment, the upper and lower bent portions are provided on the side close to the bushing 10 of the bus bar partition plate 3, but the upper bent portion is located above the conventional bus chamber partition plate 3 and is bent downward. The portion is provided below the conventional busbar chamber partition plate 3 to secure a space for forming a bent portion.

Further, in this embodiment, the bending portion of the bus chamber partition plate 3 is spaced apart from the disconnector partition plate 2. That is, a space is created (formed) between the disconnection portion partition plate 2 and the busbar chamber partition plate 3, and this space portion can also be used for heat dissipation.

  This heat dissipation effect becomes particularly prominent when the busbar partition plate 3 is not a hollow frame but a solid plate. That is, it is possible to secure a flow path through which air passes vertically between the disconnecting part partition plate 2 and the busbar chamber partition plate 3. Since the temperature of the portion surrounded by the disconnection portion partition plate 2 and the busbar chamber partition plate 3 rises due to heat generated by the conductor during energization, it is particularly preferable from the viewpoint of cooling performance to secure the flow path. Moreover, natural convection can be promoted by the vertical direction of the flow path, which contributes to further improvement in cooling performance.

  The conventional switchgear has made the chassis common by changing the position of the busbar in the main circuit pulling direction in any case, and other parts have been changed, but each part is configured as described above 1 and the switch gear of the main circuit upper drawer (cables 15 and 16 are pulled out from the top) shown in FIG. 1 and the main circuit lower drawer (cables 15 and 16 are pulled out from the bottom) shown in FIG. Like the gear, change the position of the bus 9 in the height direction according to the main circuit (cables 15, 16) pull-out direction, and replace the upper conductor 4 and the lower conductor 5 with parts used other than the housing 13. Can be shared. Of course, there are components that can be shared among the components of the housing 13.

  As described above, by attaching the conductor fixing insulator 6 to the bus bar room partition plate 3, the position that can withstand the electromagnetic force due to the short-time withstand current can be accommodated. It is necessary to spread the plate 3 in the vertical direction, and the bushing 10 is a harmful effect for spreading.

  Therefore, in this embodiment, the bus bar partition plate 3 is separated from the disconnection portion partition plate 2 so that the bushing 10 does not hit. However, since the strength of the bus-bar chamber partition plate 3 is incomplete, a bent portion is added at the tip of the bus-bar chamber partition plate 3 while ensuring an insulation distance from the branch conductor 8.

  Thereby, sufficient strength can be ensured, insulation performance can be ensured, and the top and bottom of the bus bar chamber can be opened to improve the heat.

  In addition, by changing the position of the bus 9 in the height direction for each structure and main circuit (cables 15 and 16) withdrawing direction, the parts used other than the housing 13 are drawn out of the main circuit (cables 15 and 16) In both cases, the upper conductor 4 and the lower conductor 5 can be interchanged.

  Therefore, according to the present embodiment, the same built-in component can be used regardless of the pull-out direction of the main circuit (cables 15 and 16), and a switch gear with improved workability can be configured.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to add, delete, and replace the configuration of a part of the configuration of the embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Front partition plate, 2 ... Disconnection part partition plate, 3 ... Busbar room partition plate, 4 ... Upper stage conductor, 5 ... Lower stage conductor, 6 ... Conductor fixing insulator, 7 ... Busbar fixing insulator, 8 ... Branch conductor, 9 DESCRIPTION OF SYMBOLS ... Busbar, 10 ... Bushing, 11A ... Upper drawer type circuit breaker, 11B ... Lower drawer type circuit breaker 12 ... Front door, 13 ... Housing, 14 ... Rear door, 15, 16 ... Cable, 17 ... Insulator mounting bracket.

Claims (9)

A case, a drawer type circuit breaker which is housed in the case and arranged vertically so as to turn on and off a current, a bus which supplies current to each row board, and the drawer type circuit breaker with respect to the bus Busbar partition plate installed on the opposite side, conductor fixing insulator supported by the busbar partition plate, upper and lower conductors supported by the conductor fixing insulator and supplying current to the load, A cable connected to the upper and lower conductors and capable of being pulled out in the vertical direction;
The position of the pull-out type circuit breaker is configured to be movable in accordance with the direction in which the cable is drawn, and the bus bar, bus bar partition plate, conductor fixing insulator, upper stage and lower stage according to the movement position of the pull-out type circuit breaker Conductors are placed ,
The busbars are arranged in three phases in the height direction with intervals from different phases, and each is attached to the insulator mounting bracket via a busbar fixing insulator, and the insulator mounting bracket is fixed to the busbar chamber partition plate. The bus bar partition plate is fixed to both side surfaces of the housing . The switchgear according to claim 1 ,
The bus of each phase is connected to a branch conductor of each phase on the side opposite to the bus fixing insulator, and is connected to the pull-out type circuit breaker via a bushing connected to the branch conductor. And switchgear. The switchgear according to claim 2 ,
The branch conductor is connected to the bushing at the top and bottom, and each of the top and bottom bushings is connected to the pull-out type circuit breaker. The switchgear according to claim 3 ,
The switch is characterized in that the bushing connected to the pull-out type circuit breaker is connected to the upper conductor or the lower conductor, with the opposite side of the connecting part penetrating in the front-rear direction of the disconnection part partition plate. gear. The switchgear according to claim 4 ,
The switch gear, wherein the upper conductor or the lower conductor is supported by the conductor fixing insulator and connected to the cable. The switchgear according to claim 4 or 5 ,
2. The switchgear according to claim 1, wherein the bus bar partition plate has a bent portion at a tip opposite to a side on which the insulator mounting bracket is fixed. The switchgear according to claim 6 ,
The switchgear, wherein the conductor fixing insulator is provided in the bent portion provided in the bus bar partition plate. The switchgear according to claim 6 or 7 ,
The switchgear is characterized in that the bent portion is spaced apart from the disconnection portion partition plate, and a space is formed between the disconnection portion partition plate and the busbar chamber partition plate. The switchgear according to any one of claims 1 to 8 ,
The switchgear is characterized in that the busbar partition plate is a frame-like body and the busbar is visible when viewed from the back side of the casing.

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