JP5547240B2 - Switch gear and method for removing the switch gear - Google Patents

Description

The present invention relates to a switchgear including a box body that houses therein an electric device such as a circuit breaker that cuts off power supply, and a method for removing the switchgear .

  For example, when an accident occurs in the power transmission system due to lightning or the like, the switch gear cuts off the power supply and protects the power transmission system. For example, the switchgear is connected to a power cable laid on a floor such as an indoor floor or an outdoor ground in order to supply power from a substation or the like.

  Such a switchgear is provided with the box which accommodates each electric equipment, such as a power cable, a circuit breaker, and a relay, inside. The inside of the box is partitioned into a cable room, a circuit breaker room, a relay room, and the like, and each electric device such as a power cable, a circuit breaker, and a relay is accommodated in each of the partitioned rooms (for example, Patent Document 1). See).

  As shown in FIG. 4A, the switchgear 100 installed indoors in a facility such as a substation is disposed on a channel base 102 that distributes the weight of an object on the floor surface A. Since the switchgear 100 has a height of about 2.4 m, the distance between the upper part 100A of the switchgear 100 and the ceiling S of the facility is close.

  A cable opening 101 </ b> A is formed at the bottom 100 </ b> B of the cable chamber 101 of the switch gear 100. With the end portion of the power cable 104 laid on the floor surface A standing up via the cable opening 101A, the power cable 104 is accommodated from below in the cable chamber 100a and connected to a circuit breaker (not shown). ing.

  When the switchgear 100 is deteriorated due to long-term use or malfunction occurs, the power cable 104 is cut near the floor surface A, and the switchgear 100 is rolled between the bottom 100B and the floor surface A. Etc., the switch gear 100 indicated by the arrow F is moved in the horizontal direction, and the switch gear 100 that has deteriorated or malfunctioned is removed and replaced with a new switch gear 100.

  On the other hand, as shown in FIG. 4B, the switchgear 100 installed outdoors in a facility such as a substation is arranged on a channel base 102 that distributes the weight of an object on the ground B.

  When removing the switchgear 100 installed outdoors, the connection between the power cable 104 and the circuit breaker is released, the switchgear 100 is lifted by the crane 110, and the power cable 104 is removed from the cable opening 101A of the bottom 100B. Then, the switchgear 100 that has deteriorated or malfunctioned is removed and replaced with a new switchgear 100.

  When unplugging the power cable 104 from the cable opening 101A, the switch gear 100 is supported by interposing a support member 120 between the bottom 100B and the channel base 102 while the switch gear 100 is lifted. In addition, it is necessary for the worker M to enter between the bottom portion 100 </ b> A and the channel base 102 to perform work such as supporting the power cable 104.

JP 2011-004543 A

  When removing the switchgear 100 installed indoors, the distance between the upper part 100A of the switchgear 100 and the ceiling part S of the facility is close, and the crane 110 is placed between the upper part 100A and the ceiling part S of the facility. Since the switch cable 100 cannot be lifted after being introduced, even the power cable 104 that has not deteriorated or malfunctioned must be cut near the floor surface A and removed from the floor surface A. Therefore, in order to install a new switch gear 100, it is necessary to lay a new power cable 104 on the floor surface A again. As a result, the work burden due to the removal and laying of the power cable 104 is increased, and the work cost for laying the new power cable 104, which is supposed to be unnecessary, is increased.

  On the other hand, when the switchgear 100 installed outdoors is removed, the worker M enters between the bottom 100B of the switchgear 100 lifted by the crane 120 and the channel base 102 to support the power cable 104, etc. It is necessary to do the work. Therefore, since the worker M performs work under the switch gear 100 that is an unstable heavy object in a suspended state, a high degree of work safety is required. As a result, it is assumed that the work load increases.

  Further, since a crane 110 that lifts the switch gear 100, a support member 120 that supports the lifted switch gear 100, and the like are required, it is assumed that the operation cost increases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a switchgear that can be easily removed and installed while ensuring work safety and reducing work burden and work cost. And providing a method for removing the switchgear .

In order to achieve the above object, according to the first aspect of the present invention, there is provided a box having a bottom portion formed with a cable opening through which an end of an upright table can be inserted. In a switchgear that is installed by inserting the end of the cable from above into the cable opening, the box moves the box in the horizontal direction in the installed state so that the end of the cable is moved to the box. An open passage located on the outside of the body , wherein the cable opening opens to one edge of the bottom and moves the box horizontally on the inner and outer walls of the box An opening is formed through which the end of the raised cable can pass when the cable is raised .

According to this configuration, the switch gear is constituted by a box, and the cable opening is formed at the bottom of the box. The cable opening is opened to one end edge of the bottom, and an opening through which the end of the cable erected when the box is moved in the horizontal direction is provided on the inner wall and the outer wall of the box. Since the open passage is formed with a simple configuration, when removing the switch gear that has deteriorated or malfunctioned, the end of the cable passes through the open passage by moving the box horizontally. The switchgear can be removed.

  Thus, the switch gear can be removed without lifting the switch gear and without cutting the end of the cable when the switch gear cannot be lifted. Therefore, the work load and work cost can be suppressed, the switch gear can be removed, and a new switch gear can be installed.

A switchgear according to a second aspect is the switchgear according to the first aspect , wherein the switchgear is detachably formed in the opening portions of the inner wall and the outer wall, and a part of the opening portion is attached to the opening portion. It is provided with the reinforcing material which closes all.

  According to this configuration, the support rigidity of the switch gear, which is a heavy object, can be improved by attaching the reinforcing member that closes the openings of the inner wall and the outer wall. On the other hand, when the switchgear is removed, the reinforcing material is formed so as to be detachable. Therefore, the switchgear can be easily removed by removing the reinforcing material from the opening.

Removing method of switchgear according to claim 3 is a method for removing the switchgear according to claim 1 or 2, the connection between the cable and the cable and connected to said box body of the electrical device A connection releasing step for releasing, and after the connection releasing step, the box is moved horizontally so that the end of the cable moves in the open passage, and the end of the cable is externally connected to the outside of the box. And a box horizontal movement step to be exposed to the surface.

  According to this configuration, the box is moved in the horizontal direction after the connection between the cable and the electric device is released. Thereby, since a cable can pass an open channel | path and a cable can be located in the outer side of a box, a switchgear can be removed.

  Therefore, the switch gear can be removed without lifting the end of the cable without lifting the switch gear and when the switch gear cannot be lifted. Thereby, a work load and work cost can be controlled and a switchgear can be removed.

  According to the present invention, the switch gear can be easily removed by a simple operation of moving the box in the horizontal direction. Therefore, it is not necessary to lift the switchgear when removing the switchgear installed outdoors. As a result, it is possible to reduce the work burden and work cost caused by lifting the switch gear, and it is not necessary to perform the removal work by entering the work under the switch gear when the switch gear is lifted. Can be secured.

  Furthermore, the switch gear can be removed without cutting the end of the cable. Thereby, it is not necessary to cut a healthy cable, and when installing a new switchgear, the existing cable can be used continuously. Therefore, it is possible to reduce the work load and work cost when removing the switch gear and installing a new switch gear.

It is a figure explaining the outline of the switchgear which concerns on this Embodiment. Similarly, it is sectional drawing explaining the outline of the switchgear which concerns on this Embodiment. It is a figure explaining the outline in the case of removing the switchgear which concerns on this Embodiment. It is a figure explaining the outline of the removal method of the conventional switchgear, (a) is the case where the switchgear is installed indoors, (b) explains the removal method when the switchgear is installed outdoors. FIG.

  Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3, the same components as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 1 is a diagram for explaining the outline of the switch gear 10 according to the present embodiment, and FIG. 2 is a cross-sectional view for explaining the outline of the switch gear 10. As illustrated, the switchgear 10 includes a metal box 20 and is formed in a metal closed type that accommodates a plurality of electrical devices such as circuit breakers.

  The box 20 has a bottom portion 20A formed with a cable opening 22 through which the end portion 104a of the raised power cable 104 is inserted, and accommodates the end portion 104a of the power cable 104 therein.

  The box 20 includes an open passage 21 that moves the box 20 in the horizontal direction to position the power cable 104 outside the box 20. In this embodiment, the open passage 21 is a cable opening 22 formed to open to the end edge 20Aa of the bottom 20A, and a first opening 24 serving as an opening provided in the inner wall and the outer wall of the box 20. And the second opening 26.

  Next, a specific configuration of each part of the switchgear 10 in the present embodiment will be described.

  The box body 20 includes a bottom portion 20A and a side portion 20B that is erected from the bottom portion 20A, a rear portion 20C that is also erected from the bottom portion 20A and continues to the rear end edge of the side portion 20B, and is opposed to the rear portion 20C. 20D is provided with a first opening 24 that is a lower end edge of the front portion 20D and is notched upward from the end edge 20Aa of the bottom portion 20A and opened to the outside.

  On the other hand, the box 20 has an upper portion 20E that is continuous from the upper end edge of the side portion 20B, the rear portion 20C, and the upper end edge of the front portion 20D and faces the bottom portion 20A, and has a bottom portion 20A, a side portion 20B, a rear portion 20C, and a front portion. 20D and upper part 20E form a cube. These side portions 20B, rear portion 20C and front portion 20D constitute an outer wall.

  The box 20 is partitioned into a plurality of chambers so that various electric devices can be accommodated, and accommodates a relay (not shown) from the direction indicated by the arrow L toward the direction indicated by the arrow R. The relay chamber 30 and the cable chamber 32 that houses the power cable 104 are arranged in this order.

  On the other hand, a first circuit breaker chamber 34 that houses a first circuit breaker (not shown) is disposed adjacent to the cable chamber 32, and a bus bar chamber 36 that houses a bus bar (not shown) and a bus bar chamber 36 below the first circuit breaker chamber 34. The 2nd circuit breaker chamber 38 which accommodates the 2nd circuit breaker which is not illustrated below is arrange | positioned.

  The relay chamber 30 to the second breaker chamber 38 are partitioned by the inner wall 40A between the relay chamber 30 and the cable chamber 32, and the cable chamber 32, the first breaker chamber 34, the busbar chamber 36, and the second breaker chamber. 38 is partitioned by the inner wall 40B. On the other hand, the space between the first circuit breaker chamber 34 and the busbar chamber 36 is partitioned by the inner wall 40C, and the space between the busbar chamber 36 and the second circuit breaker chamber 38 is partitioned by the inner wall 40D. On the inner wall 40A that partitions the relay chamber 30 and the cable chamber 32, a second opening 26 is formed by notching upward from the lower end edge 40Aa.

The cable opening 22 is formed in a concave shape cut out inward of the box 20 and is formed to open from the inside of the box 20 to the end edge 20Aa of the bottom 20A in the bottom 20A. In the present embodiment, the cable opening 22 is formed with a notch width that is close to the width of the bottom portion 20A.

  The first opening 24 and the second opening 26 have a size that allows the end 104a of the accommodated power cable 104 to pass in the horizontal direction, and are formed to open to the outside. The lower side of the first opening 24 and the second opening 26 is formed open by the cable opening 22. An outer door 60 shown in FIG. 3 is provided in the first opening 24 so as to be openable and closable with respect to the first opening 24.

  With the outer door 60 opened, the outside communicates with the relay chamber 30 through the first opening 24, and the relay chamber 30 and the cable chamber 32 through the second opening 26 provided on the inner wall 40A. And communicate. That is, the box 20 is formed by connecting the cable chamber 32 and the outside via the relay chamber 30.

  The box 20 having the above configuration is disposed on the channel base 102 that distributes the weight of the object on the floor surface A or the ground surface B, and is installed indoors or outdoors in the facility. In the present embodiment, the end 104 a of the power cable 104 laid on the floor surface A or the ground B is raised and protrudes from the channel base 102, and the end 104 a of the power cable 104 is in the cable chamber of the box 20. The box 20 is disposed on the channel base 102 so as to be accommodated in the channel 32.

  In the present embodiment, the box 20 is disposed on the channel base 102 with the reinforcing plate 50 interposed between the box 20 and the channel base 102. The reinforcing plate 50 has a communication portion 50a that is inserted through the end portion 104a of the power cable 104 protruding from the channel base 102 and communicates with the cable opening 22 in a state of being overlapped with the bottom portion 20A of the box 20. Formed. Further, the reinforcing plate 50 is formed with a control cable insertion portion 50b through which a control cable (not shown) is inserted.

  In this way, with the reinforcing plate 50 disposed on the channel base 102 and the box 20 disposed thereon, a plate-like lower reinforcing member 52 is attached to the lower portion of the second opening 26, A front reinforcing member 54 is attached to the lower portion of the first opening 24 and is configured to close a part of the first opening 24 and the second opening 26.

  With the reinforcing plate 50, the lower reinforcing member 52, and the front reinforcing member 54, it is possible to improve the support rigidity of the switchgear 10 which is a metal-closed heavy object. On the other hand, small animals can also be prevented from entering the switch gear 10 and rusting of the switch gear 10 due to moisture.

  Next, the case where the switchgear 10 which concerns on this Embodiment is removed is demonstrated.

  FIG. 3 is a diagram for explaining the outline when the switchgear 10 according to the present embodiment is removed. As shown in FIG. 3A, the outer door 60 of the switchgear 10 installed indoors or outdoors in the facility is opened, and the lower reinforcing member 52 and the front reinforcing member 54 are removed. Thereby, the cable chamber 32 communicates with the outside through the relay chamber 30. Thereafter, the connection between the end 104a of the power cable 104 and the circuit breaker (not shown) is released (connection release step). At this time, the power cable 104 is kept standing even if the connection with the circuit breaker is released.

  After the disconnection process, the switchgear 10 is lifted with a jack or the like, and a roller 130 is interposed between the bottom 20A of the box 20 and the floor A or the ground B as shown in FIG. The switch gear 10 is moved in the horizontal direction indicated by the arrow F, that is, in the direction opposite to the direction in which the first opening 24 and the second opening 26 are opened. When the switch gear 10 is moved in the horizontal direction F, the end 104a of the power cable 104 passes through the second opening 26 and the first opening 24, and the end 104a of the power cable 104 is exposed to the outside. (Box horizontal movement process).

  Thus, according to the switchgear 10 of the present embodiment, when the switchgear 10 is installed indoors, the switchgear 10 can be connected to the first opening 24 and the sound without cutting the healthy power cable 104. By moving toward the horizontal direction F opposite to the direction in which the second opening 26 opens, the switchgear 10 in which deterioration or malfunction has occurred can be easily removed.

  Therefore, even when a new switchgear 10 is installed, it is not necessary to install a new power cable 104, and the existing power cable 104 can be used continuously. It is possible to reduce the work burden and work cost when installing the switch gear 10.

  On the other hand, when the switchgear 10 is installed outdoors, the switchgear 10 is lifted by a crane or the like, the unstable switchgear 10 in a lifted state is supported by a support member or the like, and the switchgear 10 is in a supported state. There is no need for the operator to enter under the gear 10 to perform work.

  Therefore, after ensuring work safety, the work load and work cost can be reduced, the deteriorated switchgear 10 installed outdoors can be removed, and a new switchgear 10 can be installed.

  Further, in the present embodiment, the cable opening 22 is formed so that the notch width W1 has a width close to the width W2 of the bottom portion 20A, so that the switch gear 10 is moved in the horizontal direction F. When the end 104a of the power cable 104 is passed through the first opening 22 and the second opening 24, the bottom 20A of the switch gear 10 is prevented from colliding with the end 104a of the standing power cable 104. Thus, the power cable 104 can be prevented from being damaged.

  When a new switchgear 10 is installed, a roller 130 is interposed between the bottom 20A of the box 20 of the switchgear 10 and the floor A or the ground B, and the switchgear 10 is shown in the horizontal direction indicated by the arrow F. The first opening 24 and the second opening 26 are moved in the opposite direction. When the switch gear 10 is moved in a direction opposite to the horizontal direction F, the end 104a of the power cable 104 passes through the first opening 24 and the second opening 26, and the end 104a of the power cable 104 The cable chamber 32 is accommodated from below. Thereafter, the end 104a of the power cable 104 and a circuit breaker (not shown) are connected.

  The cable opening 22 provided in the bottom 20A of the box 20 is closed by a plate-like member or a clay member, and the lower reinforcing member 52 and the front reinforcing member 54 are attached thereto.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of invention. Although the case where the box 20 and the reinforcing plate 50 are formed separately has been described in the above embodiment, the end 104a of the power cable 104 can pass through the communication hole 50a of the reinforcing plate 50 in the horizontal direction. By forming in a simple shape, the bottom portion 20A of the box 20 and the reinforcing plate 50 can be overlapped and formed integrally by welding or the like.

  In the above embodiment, the case where the lower reinforcing member 52 is attached so as to close a part of the second opening 26 and the front reinforcing member 54 is attached so as to close a part of the first opening 24 has been described. However, for example, the front reinforcing member 54 and the lower reinforcing member 52 may be configured to close all of the first opening portion 24 and the second opening portion 26.

DESCRIPTION OF SYMBOLS 10 Switchgear 20 Box 20A Bottom part 20B Side part 20D Front part 21 Open passage 22 Cable opening part 24 First opening part 26 Second opening part 30 Relay room 32 Cable room 40a Inner wall 50 Reinforcement plate 52 Lower reinforcement material 54 Front part reinforcement Material 104 Power cable (cable)
104a end

Claims (3)

A box having a bottom formed with a cable opening through which the end of the raised table can be inserted is inserted into the cable opening from above the end of the raised cable. In the switchgear to be installed,
The box is
With an open passage to position the end portion of said cable outwardly of the box body by moving the the box body in a horizontal direction in the installed state,
The open passage is
The cable opening is open to one end edge of the bottom and the opening through which the end of the raised cable can pass when moving the box horizontally to the inner wall and the outer wall of the box A switchgear characterized by being provided . 2. The switch according to claim 1, further comprising a reinforcing member that is detachably formed in the opening portions of the inner wall and the outer wall and closes part or all of the opening portion while being attached to the opening portion. gear. A method for removing the switchgear according to claim 1 or 2 ,
A connection releasing step for releasing the connection between the cable and the electrical device in the box connected to the cable;
After the disconnection step, the box is horizontally moved so that the end of the cable moves in the open direction so that the end of the cable moves in the open passage and the end of the cable is exposed to the outside from the box. Process,
A method for removing the switchgear.

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