JP2014096882A - Metal-enclosed switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal-enclosed switchgear in which pressure rise in a lower stage chamber can be suppressed quickly, along with an upper stage chamber.SOLUTION: In a multi-stage metal-enclosed switchgear having chambers 3a, 3b, 3c for housing apparatus at upper and lower stages, ceiling openings 9a, 9b, 9c, and ceiling flappers 10a, 10b, 10c for closing the ceiling openings 9a, 9b, 9c and being opened when the pressure rises are provided in the ceiling of the chambers 3a, 3b, 3c on the upper stage, and lower stage openings 11a, 11b communicating with an upper stage chambers 3b, and lower stage flappers 12a, 12b for closing the lower stage openings 11a, 11b and being opened when the pressure rises are provided in the chambers 3d, 3e, 3f on the lower stage.

Description

  Embodiments of the present invention relate to a metal closed switchgear that can improve the pressure release characteristics of a multistage switchgear.

  Conventionally, in a metal closed switchgear, when an arc is generated and an internal pressure rises, a high-temperature gas is released from an opening provided in a ceiling part to the outside of the box body, and prevents deformation and breakage (for example, , See Patent Document 1). Also, in multi-stage stacking with storage devices such as circuit breakers in multiple upper and lower stages, there is a common pressure relief chamber, and once the hot gas is introduced into the pressure relief chamber, the box is opened from the opening provided in the ceiling. One that releases high-temperature gas outside the body is known (for example, see Patent Document 2). However, in the lower chamber, since the pressure is released via the pressure release chamber, a time loss occurs until the pressure is released to the outside, and deformation or breakage may occur. For this reason, what can suppress the pressure rise of a lower chamber rapidly was desired.

JP 2012-196044 A Japanese Patent Laid-Open No. 10-322811

  The problem to be solved by the present invention is to provide a metal closed switchgear that quickly suppresses an increase in pressure in a lower chamber lower than the upper chamber, together with an upper chamber having an opening in the ceiling.

  In order to solve the above problems, a metal closed switchgear according to an embodiment is a multistage stacked metal closed switchgear having respective chambers for storing storage devices in the upper and lower stages, and the ceiling portion of each uppermost chamber. Includes a ceiling opening and a ceiling flapper that closes the ceiling opening and is opened when the pressure rises, and in each chamber below the uppermost stage, a lower opening that circulates to the uppermost stage, The lower opening is closed, and a lower flapper that is opened when the pressure rises is provided.

The side view which shows the structure of the metal closed type switchgear which concerns on Example 1 of this invention. The side view which shows the structure of the metal closed type switchgear which concerns on Example 2 of this invention. The side view which shows the structure of the metal closed type switchgear which concerns on Example 3 of this invention. The side view which shows the structure of the metal closed type switchgear which concerns on Example 4 of this invention. The side view which shows the structure of the metal closed type switchgear which concerns on Example 5 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a metal closed switchgear according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a side view showing the configuration of the metal closed switchgear according to the first embodiment of the present invention. The multi-stage stacked metal closed switchgear will be described using a two-stage stack with a two-line power receiving configuration.

  As shown in FIG. 1, a box 1 having a front plate 1a, a ceiling plate 1b, a back plate 1c, and a floor plate 1d is divided into an upper power supply system 2a and a lower power supply system 2b, with an intermediate portion in the vertical direction shown in the figure as a boundary. Configured.

  The upper power supply system 2a is divided into a front-side upper circuit breaker chamber 3a, a rear-side upper cable chamber 3b, and a rear-side upper-stage bus chamber 3c. The upper circuit breaker chamber 3a, the upper cable chamber 3b, and the upper bus bar chamber 3c are partitioned by a plate-shaped first upper partition wall 4a. An L-shaped second upper partition wall 4b is provided between the middle portion of the first upper partition wall 4a and the ceiling plate 1b, and is partitioned into an upper cable chamber 3b and an upper bus chamber 3c.

  The lower power supply system 2b is configured by being divided into a lower circuit breaker chamber 3d on the front side, a lower cable chamber 3e on the rear side, and a lower bus room 3f on the rear side. The lower circuit breaker chamber 3d, the lower cable chamber 3e, and the lower bus bar chamber 3f are partitioned by a plate-shaped first lower partition wall 4c. The first lower partition 4c is connected to the first upper partition 4a. An L-shaped second lower partition 4d is provided between the middle portion of the first lower partition 4c and the floor plate 1d, and an L-shape is formed between the upper surface of the second lower partition 4d and the first lower partition 4c. The third lower partition wall 4e is provided and is partitioned into a lower cable chamber 3e and a lower bus chamber 3f. The upper circuit breaker chamber 3a and the lower circuit breaker chamber 3d are partitioned by an intermediate plate 4f. The upper cable chamber 3b is formed over the entire back side from the floor surface to the ceiling surface.

  The upper circuit breaker chamber 3a accommodates the upper circuit breaker 5a, and the upper conductor is connected to the upper upper circuit disconnecting portion 6a fixed to the first upper partition wall 4a. The lower conductor is connected to an upper lower disconnecting portion 6b fixed to the first upper partition 4a. An L-shaped upper main circuit conductor 7a to which a power cable (not shown) is connected is connected to the upper lower disconnecting portion 6b of the upper cable chamber 3b. An upper bus bar 8a connected to an adjacent panel is connected to the upper upper disconnecting portion 6a of the upper bus chamber 3c.

  The ceiling plate 1b of the upper circuit breaker chamber 3a, the upper cable chamber 3b, and the upper bus bar chamber 3c is provided with a first ceiling opening 9a, a second ceiling opening 9b, and a third ceiling opening 9c, respectively. A first ceiling flapper 10a, a second ceiling flapper 10b, and a third ceiling flapper 10c are provided so as to close these ceiling openings 9a, 9b, 9c. A hinge (not shown) is provided on one side of the first to third ceiling board flappers 10a, 10b, and 10c and the ceiling board 1b, and the first to third ceiling flappers 10a, 10b, and 10c are shown with the hinge as a fulcrum. So as to rotate.

  The lower circuit breaker chamber 3d houses the lower circuit breaker 5b, and the upper conductor is connected to the lower upper circuit disconnecting portion 6c fixed to the first lower partition wall 4c. The lower conductor is connected to a lower lower disconnecting portion 6d fixed to the first lower partition 4c. An L-shaped lower main circuit conductor 7b to which a power cable (not shown) is connected is connected to the lower lower disconnecting portion 6d of the lower cable chamber 3e. A lower bus line 8b connected to an adjacent panel is connected to the lower upper disconnection portion 6c of the lower bus bar chamber 3f.

  A first lower opening 11a is provided on the upper surface of the second lower partition 4d of the lower cable chamber 3e, and a first lower flapper 12a is provided so as to close the first lower opening 11a. A hinge (not shown) is provided between one side of the first lower flapper 12a and the second lower partition 4d, and the first lower flapper 12a rotates as shown in the figure with the hinge as a fulcrum. A second lower opening 11b is provided on the upper surface of the third lower partition 4e in the lower bus chamber 3f, and a second lower flapper 12b is provided so as to close the second lower opening 11b. A hinge (not shown) is provided between one side of the second lower flapper 12b and the third lower partition 4e, and the second lower flapper 12b rotates as shown in the drawing with the hinge as a fulcrum. The first lower opening 11a and the second lower opening 11b circulate in the upper cable chamber 3b.

  As a result, for example, when an arc is generated in the lower cable chamber 3e and the internal pressure rises, the first lower flapper 12a immediately rotates to release the high temperature gas from the first lower opening 11a to the upper cable chamber 3b. To do. When the arc continues and the internal pressure of the upper cable chamber 3b increases, the third ceiling flapper 10c operates. In the lower bus bar chamber 3f, the second lower flapper 12b operates to discharge the high temperature gas into the upper cable chamber 3b. Thus, when an arc is generated in the lower cable chamber 3e and the lower bus bar chamber 3f, the pressure rise can be quickly suppressed, and the deformation and breakage of the box 1 can be prevented. The first to third ceiling flappers 10a, 10b, and 10c are the same as the conventional ones, and prevent pressure increase in the upper power supply system 2a. In addition, since the conventional pressure release chamber is unnecessary, the installation area and the overall shape can be reduced.

  According to the metal closed type switchgear of the first embodiment, the first lower flapper 12a and the second lower step operated by increasing the internal pressure in the lower cable chamber 3e and the lower busbar chamber 3f located at the lower stage of the box body 1. Since the flapper 12b is provided and the high temperature gas is discharged to the outside of the box 1 through the upper cable chamber 3b, the lower chambers 3a, 3b and 3c for storing storage devices such as circuit breakers are provided. The pressure increase in each chamber 3e, 3f can be quickly suppressed.

  In Example 1 described above, two-stage stacking has been described, but even in multi-stage stacking of three or more stages, a flapper is provided in each chamber located lower than the uppermost stage, and high temperature gas is released to the adjacent upper stage chamber. Thus, an increase in pressure in the lower chamber can be suppressed. In the uppermost chamber, hot gas is discharged from the ceiling to the outside of the box.

  Next, a metal closed switchgear according to a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a side view showing the configuration of the metal closed switchgear according to the second embodiment of the present invention. The second embodiment differs from the first embodiment in that a flapper is provided in the lower circuit breaker chamber. In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, a third lower opening 11c is provided above the first lower partition 4c, and a third lower flapper 12c is provided so as to close the third lower opening 11c. Yes. A hinge (not shown) is provided between one side of the third lower flapper 12c and the first lower partition wall 4c, and the third lower flapper 12c rotates as shown in the figure with the hinge as a fulcrum. The third opening 11c flows into the lower bus bar chamber 3f.

  According to the metal closed switchgear of the second embodiment, in addition to the effects of the first embodiment, when the internal pressure rises in the lower circuit breaker chamber 3d, the box body is provided via the lower bus chamber 3f and the upper cable chamber 3b. The hot gas can be released outside the unit 1.

  Next, a metal closed switchgear according to a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a side view showing the configuration of the metal closed switchgear according to the third embodiment of the present invention. The third embodiment differs from the second embodiment in that a stopper is provided on the lower flapper. In FIG. 3, the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, first and second stoppers 13a and 13b are respectively provided on the back side of the first lower flapper 12a and the second lower flapper 12b which are the hinge sides. As a result, when the first and second lower flappers 12a and 12b are rotated from the horizontal position to the vertical position as shown in the figure, the first and second stoppers 13a and 13b are prevented from rotating, and the hot gas Direct the flow toward the ceiling. That is, the flow to the back side can be prevented and guided to the ceiling side, and the operation of the third ceiling flapper 10c can be facilitated.

  According to the metal closed switchgear of the third embodiment, in addition to the effects of the second embodiment, the flow of high-temperature gas can be guided to the ceiling side, and the third ceiling flapper 10c can be operated quickly. .

  Next, a metal closed switchgear according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a side view showing the configuration of the metal closed switchgear according to the fourth embodiment of the present invention. The fourth embodiment differs from the third embodiment in that a spring is provided in the lower flapper. In FIG. 4, the same components as those in the third embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the first and second lower flappers 12a and 12b are urged to open between the first and second stoppers 13a and 13b and the first and second lower flappers 12a and 12b. The first and second springs 14a and 14b are provided. For example, U-shaped locking brackets are provided on the sides of the first and second lower flappers 12a and 12b facing the hinges, and the second and third lower partition walls 4d and 4e are provided when the internal pressure increases. So that it can be easily removed from the edge.

  According to the metal closed switchgear of the fourth embodiment, in addition to the effects of the third embodiment, the first and second lower flappers 12a and 12b can be operated in a short time.

  Next, a metal closed switchgear according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a side view showing the configuration of the metal closed switchgear according to the fifth embodiment of the present invention. The fifth embodiment differs from the fourth embodiment in that cooling fins are provided in the ceiling opening. In FIG. 5, the same components as those in the fourth embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the first to third ceiling openings 9a to 9c are provided with first to third cooling fins 15a to 15c in which metal thin plates are arranged in a comb shape.

  According to the metal closed switchgear of the fifth embodiment, in addition to the effects of the fourth embodiment, when the high-temperature gas passes through the first to third cooling fins 15a to 15c, the metal thin plate is melted and used as melting heat. Take away and cool the hot gas.

  According to the embodiment as described above, in the multistage stacked metal closed switchgear, it is possible to suppress the pressure increase in the lower chambers together with the upper chambers in which the storage devices are stored. The hot gas is emitted from the ceiling side in both the upper and lower rooms.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Box 3a Upper stage circuit breaker room 3b Upper stage cable room 3c Upper stage bus room 3d Lower stage circuit breaker room 3e Lower stage cable room 3f Lower stage bus room 10a 1st ceiling flapper 10b 2nd ceiling flapper 10c 3rd ceiling flapper 12a 1st Lower flapper 12b Second lower flapper 12c Third lower flapper 13a, 13b Stopper 14a, 14b Spring 15a, 15b, 15c Cooling fin

Claims (6)

A multistage stacked metal closed switchgear having chambers for storing storage devices in upper and lower stages,
In the ceiling of each uppermost room, there is a ceiling opening,
The ceiling opening is closed, and a ceiling flapper that is opened when the pressure rises is provided.
In each chamber below the uppermost stage, a lower opening that circulates to the uppermost stage,
A metal closed type switchgear characterized in that a lower flapper that closes the lower opening and is opened when the pressure rises is provided. An upper electrical system having an upper circuit breaker room, an upper cable room, and an upper bus room;
A metal closed type switchgear composed of a lower circuit breaker room having a lower circuit breaker room, a lower cable room, and a lower bus bar room located in the lower stage of the upper electric system,
The upper circuit breaker chamber, the upper cable chamber, and the upper busbar chamber have ceiling openings, respectively,
Each of these ceiling openings is closed, and a ceiling flapper that is opened when the pressure rises is provided.
The lower cable chamber, the lower bus chamber, the first and second lower openings that circulate in the upper cable chamber,
A metal-closed switchgear characterized in that the lower opening portion is closed and the first and second lower flappers are opened when the pressure rises. A third lower opening that circulates in the lower busbar chamber in the lower breaker chamber;
3. The metal closed switchgear according to claim 2, further comprising a third lower flapper that closes the third lower opening and is opened when the pressure increases.   The first and second stoppers are provided respectively for preventing the first and second lower flappers from rotating when they start rotating from the horizontal position and reach the vertical position. Item 4. The metal closed switchgear according to item 3.   A spring that is urged so that the first and second lower flappers rotate is provided between the first and second lower flappers and the first and second stoppers, respectively. Item 5. The metal closed switchgear according to item 4.   6. The metal closed switchgear according to claim 2, wherein a cooling fin for cooling the high temperature gas is provided in each of the ceiling openings.

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