JP2012239248A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switchgear which enables a switch unit to be replaced in a location where many level differences occur.SOLUTION: A switchgear includes a housing 1 and a switch unit 2 housed in the housing 1. The switch unit 2 has a switch opening or closing current flow and an operation unit operating the switch and is connected with bus bars and cables. Further, the switch unit 2 may be removed from the housing 1, and an upper part of the housing 1 has an opening 13 for taking out the switch unit 2 to the exterior of the housing 1.

Description

  The present invention relates to a switchgear, and in particular, aims to improve replacement work of a switch unit unit including a switch.

  The power distribution system is provided with a closed type switchboard (referred to as switchgear) that houses a circuit breaker or the like for interrupting a load current or an accident current. And there exists a technique which makes it possible to manufacture the switch etc. which become main parts in a switch gear independently, and to be able to manufacture so that it can be removed from a housing, and this is described in patent documents 1.

  In Patent Document 1, a switch and its operation unit are combined into a unit, which can be removed and replaced in a batch, and the switch unit itself can be replaced with a spare part.

JP 2008-245409 A

  However, in the switchgear described in Patent Document 1, the switch unit portion (although a structure that can be moved up and down without changing the position of the solid insulated bus is described in order to shorten the replacement work time). ) The switch unit cannot be removed from the upper part of the switchgear.

  For example, the floor is flat indoors, and the operator can take out the switch unit using a lifter as shown in FIG. 11, but the lifter is used in a place with many steps, that is, outdoors. The work is unstable and difficult. In such a case, it is desirable to take out the switch unit using a large crane as shown in FIG. 10. In this case, the switch gear described in Patent Document 1 can lift the switch unit with the crane. Therefore, the replacement work cannot be performed.

  Therefore, an object of the present invention is to provide a switchgear that can replace a switch unit even in a place with many steps.

  In order to solve the above-described problems, a switchgear according to the present invention is a switchgear that includes a casing and a switch unit housed in the casing, and the switch unit opens and closes a current. A switch and an operating device for operating the switch, and connected to a bus and a cable and removable from the housing, and the switch unit is disposed outside the housing on the housing. And an opening that can be taken out.

  According to the present invention, the switch unit in the switch gear can be exchanged even in a place with many steps.

1 is a perspective view of a switch gear according to Embodiment 1. FIG. It is an enlarged view of the door provided in a housing. It is a rear view of the door provided in a housing. It is the figure which showed typically the side cross section of the switchgear which concerns on Example 1. FIG. It is a figure which shows a mode that the frame top plate of the switchgear which concerns on Example 1 is mounted | worn. It is a figure which shows a switch unit. It is a top view in the state where the roof of the switchgear concerning Example 1 was removed. FIG. 6 is a simplified diagram for explaining a switch gear guide according to the first embodiment. It is a perspective view in the state where the roof of the switchgear concerning Example 1 was removed. It is a figure which shows a mode that a switch unit is lifted from a switchgear using a crane. It is a figure which shows a mode that a switch unit is lifted from a switchgear using a lifter.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. In addition, the following Example is only an example on implementation to the last, and the content of invention is not limited to an Example. The present invention is defined by the scope of claims, and various modifications are possible as long as they belong to the scope.

  The switchgear according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the switchgear according to this embodiment includes a grounded metal casing 1 that covers the entire switchgear, and is housed in the casing 1, and each of the positions of opening, closing, disconnecting, and grounding. A switch unit 2 comprising a switch that can be switched to one another (a position of these switches can be switched by a plurality of switches or a switch can be switched in one switch) and an operating device for operating the switch. And a removable roof 3 covering the metal housing 1. In FIG. 1 and FIG. 9, one end side of the side surface of the housing 1 is opened and the other end side is sealed so that a bus bar can be connected to the adjacent switch gear. When the bus bar protrudes on both side surfaces, the both end sides of the side surface of the housing 1 are open.

  The housing 1 is provided with a door 4 that can be opened and closed with respect to the housing 1. By opening the door 4, an operator can touch the inside of the housing 1. A ventilation groove 5 communicating with the inside of the housing 1 is formed on the lower side of the door 4 so that air can be exchanged between the inside and outside of the housing 1, and the inside of the housing 1 from the outside of the housing 1 through the ventilation groove 5. It becomes possible to take in the air.

  As shown in FIG. 2, the ventilation groove 5 is fixed to the door 4 body by tightening bolts 6, and the periphery of the bolt 6 tightening is sealed by caulking 7, and the ventilation grooves 5 and the door 4 body are sealed. This prevents moisture from entering the housing 1 from the fixed portion. Further, the ventilation groove 5 is formed with a water avoiding portion 8 extending outward and downward with respect to the housing 1 so that rain or the like does not enter the housing 1 by the water avoiding portion 8. Yes.

  As shown in FIG. 3, the door 4 includes a packing member 9 on the housing 1 side. When the door 4 is closed, the door 4 is sealed by the packing member 9, and the housing 4 is sealed from the gap between the door 4 and the housing 1. 1 so that moisture can be prevented from entering inside.

  As shown in FIG. 4, a ventilation groove 10 is formed in the roof 3, and air can be exchanged inside and outside the housing 1. During use of the switchgear, the inside of the housing 1 becomes high temperature due to heat generation, so that air flows from the ventilation groove 5 into the inside of the housing 1 and heat is exchanged in the switchgear and becomes high temperature, and the specific gravity increases. The air which became small goes up and the flow discharge | released from the ventilation groove 10 provided in the roof 3 arises. In the ventilation groove 10, similarly to the ventilation groove 5, a water avoiding portion 11 extending outward and downward with respect to the roof 3 is formed. The roof 3 is prevented from entering. An opening 13 that is larger than the switch unit 2 and from which the switch unit 2 can be taken out is provided on the upper surface of the housing 1 inside the roof 3. The flange portion 14 on the upper surface of the housing 1 that forms the opening 13 is located above the housing upper surface 15. And the partition plate 12 is arrange | positioned between the said ventilation groove | channel 10 and the opening part 13, Even if rain etc. penetrate | invade from the ventilation groove | channel 10, without reaching the opening part 13, The liquid droplets are allowed to fall on the housing upper surface 15. Since the heel portion 14 of the opening 13 is located on the upper side with respect to the housing upper surface 15, the liquid droplets that have dropped onto the housing upper surface 15 do not fall into the opening 13. Waterproofing can also be done from this point.

  As shown in FIG. 5, a detachable frame top plate 16 having a part of the top plate hooked on the collar portion 14 by the collar portion 14 to fit in the opening portion 13 and having an opening area smaller than the opening portion 13. It has become. By removing a part of the top plate when removing or replacing the switch unit, there is no part that obstructs the entrance of the elevator, so the elevator can be easily moved in and out of the panel when removing and replacing the switch unit. Can be made.

  FIG. 6 shows the switch unit 2. As an example in the switch unit 2, as described in, for example, Japanese Patent Application Laid-Open No. 2007-14086, a switch that can simultaneously close, open, and disconnect two pairs of contacts in vacuum insulation, and in vacuum insulation A grounding switch that can be switched between closed and grounded is provided for each phase, and an operation device for operating these is provided, or as described in Japanese Patent Application Laid-Open No. 2011-41407, it is closed and opened in vacuum insulation. And a switch for switching between closing, disconnection, and grounding in air and solid insulation for each phase, and a controller for operating these. In addition to this, there is no problem in realizing the present invention as long as a switch that performs switching of current and a controller that operates the switch are unitized.

  The switch unit 2 is provided with a metal fitting 18 for mounting a lifting member 17 to be hooked when lifting with a crane or the like. The lifting member 17 is always attached to the switch unit 2, but may be removable. In this embodiment, a part of the frame of the switch unit and a part of the frame constituting the switch gear are shared. As a result, the number of parts can be reduced, but moreover, it is necessary to secure a space for removing the switch unit in the switchgear panel, and by taking out the switch unit, The overall size of the switchgear is also increased, but a part of the frame that constitutes the switchgear is shared with the switchgear unit 2 to secure a space for removing the switchgear unit in the switchgear panel. Is eliminated, and the overall size of the switchgear can be reduced. Further, the shared frame can be attached to and detached from the switchgear body. Here, the switchgear main body refers to a portion that remains in the switchgear when the switch unit is removed regardless of the housing 1. Thereby, when removing and exchanging the switch unit, it is possible to secure a space necessary for raising and lowering the switch unit by removing the removable frame. If the switch gear and switch unit 2 share part of the frame, the switch unit 2 will not be able to change its position with respect to the switch gear. By making it possible, the switch unit can be moved up and down even when a part of the frame constituting the switchgear panel of the switch unit is shared.

  As shown in FIGS. 7 and 8, guides 19 extending downward from the inside of the four corners of the flange portion 14 of the opening 13 are provided inside the switch gear so that the switch unit 2 can reach the opening 13. Further, when the switch unit 2 is lowered from the opening 13, it can be guided so as to reach a predetermined position. At this time, the guide 19 is preferably an elastic body so that the switch unit 2 is not damaged when the switch unit is raised and lowered, and is preferably formed of a material having a small coefficient of friction such as Teflon. As shown in FIG. 8, a stopper 20 that can support the switch unit 2 is provided at a predetermined height of the guide 19 that extends vertically from the flange portion 14 so that the switch unit 2 can be positioned. ing.

  The operation | work which replaces the switch unit 2 is demonstrated below about the switchgear comprised as mentioned above.

  As shown in FIG. 1, the switchgear is covered with a roof 3 in a normal state before replacement. Therefore, it is necessary to remove the roof 3 first. The roof 3 may be fixed by bolting or the like, and when removing, the roof 3 is removed by removing the fixing bolt.

  After removing the roof 3, the frame top plate 16 having an opening diameter smaller than that of the opening 13 is removed from the opening 13. The frame top plate 16 may be simply covered with the flange portion 14 or may be fixed with a bolt or the like. When removing, reverse the process.

  Next, when the lifting member 17 is not originally mounted, it is mounted on the metal fitting 18 so that the crane or the like can be lifted. Of course, this operation is not necessary if the device is originally installed.

  Thereafter, a crane or the like is hooked on the lifting member 17 and lifted as shown in FIG. At this time, the presence of the guide 19 ensures that the switch unit 2 is reliably guided to the opening 13 and can be pulled up smoothly. In addition, since the guide 19 is slidable, the collision with the guide 19 is reduced when the guide 19 is pulled up, and the switch unit 2 is hardly damaged. Further, since the guide 19 is made of a flexible elastic body, the switch unit 2 is less likely to be damaged even when it collides with the guide 19. Before starting lifting, it is necessary to remove the busbars and cables connected to the switch unit 2, and remove the bolts that the switch unit 2 is fixed to the housing 1. It is also necessary to keep it.

  After lifting with a crane or the like, the tripping operation of the switch unit 2 is completed by moving the switch unit 2 to another location.

  Next, an operation for attaching the switch unit 2 will be described. Basically, the reverse procedure of the above removal work may be taken. First, the switch unit 2 to be attached to the upper portion of the housing 1 by hooking a crane or the like on the lifting member 17 is positioned. Next, the switch unit 2 is lowered and gradually lowered from the opening 13 along the guide 19 to a height at which the stopper 20 is provided. Then, the switch unit 2 is fixed to the housing 1 by bolting while being supported by the stopper 20.

  After the switch unit 2 is fixed, the crane or the like is removed.

  Next, when removing the lifting member 17, it is removed from the metal fitting 18. Then, the frame top plate 16 is placed on the eaves portion 14 (fixed to the eaves portion 14 as necessary), and further covered with the roof 3 and fixed to the case 1. Then, it attaches to the switch unit 2 which newly attached the bus and the cable. Note that the work for attaching the bus bar and the cable may be performed before removing the roof 3 if the crane or the like is removed.

  According to the switchgear configured as in this embodiment, the switch unit 2 is provided at the top of the housing 1 so that the switch unit 2 can be taken out of the housing 1, so that the switchgear can be opened and closed even in places with many steps. Unit can be replaced.

DESCRIPTION OF SYMBOLS 1 Housing 2 Switch unit 3 Roof 4 Door 5, 10 Ventilation groove 6 Bolt 7 Coking 8 and 11 Water avoidance part 9 Packing member 12 Partition plate 13 Opening part 14 Side part 15 Housing upper surface 16 Frame top plate 17 Lifting member 18 Bracket 19 Guide 20 Stopper

Claims (13)

A switchgear comprising a housing and a switch unit housed in the housing,
The switch unit has a switch that opens and closes a current and an operating unit that operates the switch, and is connected to a bus and a cable, and is removable from the housing,
A switchgear having an opening through which the switch unit can be taken out of the housing at an upper portion of the housing. The switchgear according to claim 1,
A switchgear, wherein the switch unit includes a member to which a lifting member can be attached. The switchgear according to claim 2,
A switchgear, wherein the switch unit includes a lifting member, and is attached to a member to which the lifting member can be attached. The switchgear according to any one of claims 1 to 3,
A switchgear, wherein the opening is covered with a removable roof. The switchgear according to claim 4,
The roof is formed with a first ventilation groove,
A switchgear, which is inside the roof, and a partition member covers between the first ventilation groove and the opening. The switchgear according to claim 5,
The switchgear, wherein the first ventilation groove is covered with a water avoidance portion that covers the roof in an outward direction and a downward direction. The switchgear according to any one of claims 1 to 6,
The switch gear includes a guide member that is formed in a vertical direction and guides the switch unit to the opening. The switchgear according to claim 7,
The switch member is provided with a stopper at a predetermined position in the vertical direction, and the switch unit is held at the predetermined position in the vertical direction by the stopper. The switchgear according to any one of claims 1 to 8,
The switch unit has a frame part shared with the switchgear body,
A switchgear characterized in that the frame part is detachable. The switchgear according to any one of claims 1 to 9,
Furthermore, the door is provided with a door that opens and closes relative to the housing body,
A switchgear, wherein the door and the housing body are sealed with a packing member. The switchgear according to any one of claims 1 to 10,
The casing is formed with a second ventilation groove capable of taking air outside the casing into the casing,
The switchgear is characterized in that the ventilation groove is covered with a water avoiding portion that covers the casing in an outward direction and a downward direction. The switchgear according to any one of claims 1 to 11,
A switchgear characterized in that an end portion of the flange covering the opening is located above the upper surface of the casing. The switchgear according to claim 12,
Further, a switchgear is provided, wherein a detachable top plate having an opening smaller than the opening is provided so as to be covered with a gutter that covers the opening.

Images