JP2009201274A - Metal closed type switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal closed type switchgear compatible with an internal arc accident without changing the contour dimension of the metal closed type switchgear and its installation area. <P>SOLUTION: The switchgear includes: a first metal closed type switchgear 100 having a loaded blocker chamber 101, a bus-bar chamber 103 arranged at the back of the blocker chamber, and a cable-current transformer chamber 102 arranged at the back of the bus-bar chamber 103; a second metal closed type switchgear 200 having a blocker chamber 201 which is arranged at the side of the blocker chamber 101 at the lower side of the first metal closed type switchgear 100, and includes a partitioning plate 241 located below the partitioning plate 141 of the blocker chamber 101, a bus-bar chamber 203 arranged at the back of the blocker chamber 201, and a cable-current transformer chamber 202 arranged at the back of the bus-bar chamber 203; and common pressure-discharging chambers 205, 206 which are arranged above the blocker chamber 201 of the second metal closed type switchgear 200, and above the cable-current transformer chamber 202. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a metal closed type switchgear, and more particularly to a metal closed type switchgear in which electric devices such as circuit breakers are stacked in multiple stages.

  A metal closed switchgear is a collective device consisting of circuit breakers, disconnectors, instrument transformers, busbars, connecting conductors, and other equipment necessary for monitoring and control, and is housed in a grounded metal box. In addition, each unit circuit has a structure separated by a ground metal wall. The purpose of adopting an isolation structure with a grounded metal wall is to minimize the impact of an accident even when an internal arc accident such as a short-circuit accident occurs in one breaker room in the panel. .

  However, in metal closed type switchgear that stores and stacks electrical equipment such as circuit breakers, for example, when an internal arc accident occurs in the lower circuit breaker chamber, etc., effective release against excessive internal pressure rise at the time of the accident occurs May not have a route. For this reason, there is a possibility that the expanded air generated by the internal arc accident is not released to the outside of the panel and damages the electric devices in other sections. In order to improve this point, a pressure release box that releases the expansion air for each chamber is installed on the side of the metal closed switchgear body, and any internal arc accident that occurs in any chamber of the multistage circuit There is one that effectively releases expanded air to the outside of the panel (for example, see Patent Document 1).

Japanese Examined Patent Publication No. 6-67060

  The above-mentioned metal closed type switchgear can prevent the accident from spreading because the expanded air can be discharged to the outside even if an internal arc accident occurs in any room.

  However, since this metal closed type switchgear needs to install a pressure relief box on its side, it requires a large expansion compared to the installation area of the conventional metal closed type switchgear. Therefore, for example, when installing a metal closed type switchgear that requires a large number of feeders in the construction of thermal power, nuclear power plant, substation, switchgear, etc., this is related to the construction of the installation building, etc. It becomes a problem that cannot be overlooked. For this reason, there is a demand for a metal closed switchgear with multiple stages of circuit breakers that can cope with an internal arc accident without increasing the installation area.

  The present invention has been made based on the above-mentioned matters, and provides a multistage loading type metal closed type switchgear that can cope with an internal arc accident without changing the outer dimensions and the installation area of the metal closed type switchgear. There is to do.

  (1) In order to achieve the above object, the present invention is stacked in the vertical direction of the board surface, and is arranged at the back of the circuit breaker chamber in which the circuit breakers are respectively housed in the board, A first metal-enclosed switchgear having a busbar chamber containing a busbar, and a cable / current transformer chamber disposed on the back of the busbar chamber and accommodating a cable / current transformer in the panel, From the partition plate in the panel of the lower circuit breaker chamber in the first metal closed switchgear, which is disposed on the side of the lower circuit breaker chamber of the first metal closed switchgear. A circuit breaker room that houses a circuit breaker in a panel having a partition plate located below, a bus room that is placed on the back of the circuit breaker room, and that houses a bus in the board, and is placed on the back of the bus room The lower side of the first metal closed switchgear A second metal closed switchgear having a cable / current transformer chamber in a panel having a partition plate located below the partition plate in the panel of the cable / current transformer room. And the lower circuit breaker chamber of the first metal closed switchgear, the lower circuit breaker chamber, the cable Current transformer chamber, and first and second common pressure relief chambers for releasing internal pressure caused by an internal arc accident in the circuit breaker chamber and the cable / current transformer chamber of the second metal closed switchgear, respectively. A partition plate in the panel of the lower circuit breaker chamber in the first metal closed switchgear and a partition plate in the panel of the circuit breaker chamber in the second metal closed switchgear Between the side plates, and A partition plate in the panel of the lower cable / current transformer chamber in the metal closed switchgear of 1 and a partition plate in the panel of the cable / current transformer chamber in the second metal closed switchgear A partition plate in the panel of the circuit breaker chamber in the second metal closed switchgear, and the cable and current transformer chamber in the second metal closed switchgear. The partition plate in the panel has a discharge opening provided so as to communicate with the common pressure release chamber.

  (2) In the above (1), preferably, the discharge opening is provided with a normally closed pressure release flapper that opens in response to a pressure exceeding a certain limit.

  (3) In said (1), Preferably, the partition which divides the said common pressure release chamber for every pressure release opening part is provided.

  (4) In the above (1) to (3), preferably, a normally closed pressure release flapper that opens in response to a pressure exceeding a certain limit is provided on the ceiling of each of the first and second common pressure release chambers. Provide.

  According to the present invention, since the first and second common pressure release chambers are provided inside the second metal closed switchgear, an internal arc accident occurs in any chamber in the metal closed switchgear. However, the expanded air generated by the accident can be discharged to the outside. Further, the common pressure release chamber is provided by being partitioned inside the metal closed type switchgear. For this reason, the common pressure release chamber has the same strength and the like as the other chambers, and sufficient safety and reliability are ensured. Further, the external dimensions of the metal closed switchgear are the same as the external dimensions of the conventional metal closed switchgear. Therefore, even when a large number of feeders are required, it is possible to install a metal closed type switchgear in which circuit breakers and the like are loaded in multiple stages with substantially the same installation area as the conventional example.

Embodiments of the metal closed switchgear of the present invention will be described below with reference to the drawings.
1 to 4 show an embodiment of a metal closed switchgear according to the present invention, and FIG. 1 is a perspective view showing a configuration of an embodiment of a metal closed switchgear according to the present invention. 2 is a side view of a first metal closed switchgear constituting one embodiment of the metal closed switchgear of the present invention shown in FIG. 1, and FIG. 3 is a metal closed switch of the present invention shown in FIG. FIG. 4 is a side view of a second metal closed switchgear that constitutes an embodiment of the gear, and FIG. 4 shows an embodiment of the metal closed switchgear of the present invention shown in FIG. FIG.

  First, in FIG. 1, a metal closed switchgear 300 of the present invention is roughly composed of a first metal closed switchgear 100 in which a circuit breaker 111 is loaded in the vertical direction of the board surface, and a lower side of the board surface. Only the circuit breaker 211 is loaded, and the second metal closed switchgear 200 having the common pressure release chambers 205 and 206 is formed. A first metal closed switchgear 100 is arranged on both sides of the second metal closed switchgear 200.

Next, a first metal closed switchgear 100 constituting one embodiment of the metal closed switchgear of the present invention will be described with reference to FIGS.
The first metal closed switchgear 100 includes a front door 148 on the front side and a back door 149 on the back side, and the interior of the box-shaped panel main body 104 is divided into the partition plates 140a, 140b, 141, 142, 143, 144 is divided into sections. Due to this divided section, a panel is formed by partition plates 140a, 140b, 141, 144, a top plate 145, a bottom plate 146, and a side plate 147 of the panel main body on the upper and lower stages on the front side of the panel. A circuit breaker chamber 101 in which the circuit breakers 111 are respectively stored is formed on this panel. A board is formed on the back of the circuit breaker chamber 101 by the partition plates 143 and 144 and the side plates 147 of the board body. A bus bar chamber 103 in which the bus bar 131 is accommodated is formed on this board. Further, on the upper stage and the lower stage on the rear side of the panel, a panel composed of partition plates 142, 143, 144, a top plate 145, a bottom plate 146, a side plate 147, and a rear door 149 is formed. In this board, a cable / current transformer chamber 102 in which the cable 121 and the current transformer 123 are respectively accommodated is formed. In addition, the partition plate 141 of the circuit breaker chamber 101 is provided at the intermediate portion in the vertical direction of the panel body 104, and similarly, the partition plate 142 of the cable / current transformer chamber 102 is also positioned at the intermediate portion in the vertical direction of the panel body 104. Is provided.

  A bus 131 is disposed in the bus chamber 103 via an insulator. In the cable / current transformer chamber 102, a current transformer 123 is attached behind the circuit breaker chamber 101.

  Further, the top plate 145 of the panel main body 104 is provided with an in-panel discharge opening 110 connected to the upper circuit breaker chamber 101 and the upper cable / current transformer chamber 102. For example, a pressure release flapper 109, which is a valve mechanism that is normally closed but opens in response to a pressure exceeding a certain limit, is attached to each in-panel discharge opening 110. On the other hand, as a pressure release means for the lower circuit breaker chamber 101 and the lower cable / current transformer chamber 102, a discharge opening 108 is provided in a side plate 147 on one side of the panel main body 104 constituting each chamber serving as a panel. . This discharge opening 108 is a side plate 147 on the adjacent surface side of the adjacent second metal closed switchgear 200, and is located in the vicinity of the partition plate 141 of the circuit breaker chamber 101 and the cable / current transformer chamber 102. It is provided at two locations in the vicinity of the partition plate 142. In FIG. 1, the first metal closed switchgear 100 arranged on the right side when viewed from the front includes the side plate 147 on the left side when viewed from the front, and the first metal closed type switchgear 100 arranged on the left side when viewed from the front. Respectively, the right side plate 147 corresponds to the front view. From this discharge opening 108, it discharges | emits out of the board through the common pressure release chambers 205 and 206 of the 2nd metal closure type switchgear 200 mentioned later.

Next, a second metal closed switchgear 200 constituting one embodiment of the metal closed switchgear of the present invention will be described with reference to FIGS.
The second metal closed switchgear 200 includes a front door 248 on the front side and a back door 249 on the back side, and the interior of the box-shaped board body 204 is divided into the partition plates 240a, 240b, 241, 242, 243, 244, and divided. Due to this divided section, a panel is formed by the partition plates 240b, 241, 244, the bottom plate 246, and the side plates 247 of the panel main body at the lower stage on the front side of the panel. A circuit breaker chamber 201 in which the circuit breaker 211 is accommodated is formed on this panel. In addition, in the upper stage of the circuit breaker chamber 201, a board is formed by partition boards 240 a, 241, 244, a top board 245, and side plates 247 of the board body. In this board, partition plates 251 and 252 are provided, and a first common pressure release chamber 205 is formed. In addition, on the backs of the circuit breaker chamber 201 and the first common pressure release chamber 205, a panel is formed by partition plates 243 and 244, a top plate 245, and a side plate 247 of the panel body. A bus bar chamber 203 in which the bus bar 231 is stored is formed on this board. Further, a panel is formed by a partition plate 242, 243, 244, a bottom plate 246, a side plate 247, and a back door 249 of the panel main body on the lower side of the panel back side. In this panel, a cable / current transformer chamber 202 in which the cable 221 and the current transformer 223 are respectively stored is formed. In addition, on the upper stage of the cable / current transformer chamber 202, a board is formed by partition boards 242 and 243, a top board 245, a side board 247, and a back door 249 of the board body. In this board, partition plates 261 and 262 are provided, and a second common pressure release chamber 206 is formed.

  Here, the partition plate 241 of the panel body 204 is provided below the partition plate 141 in the adjacent first metal closed switchgear 100, and similarly, the partition plate 242 of the cable / current transformer chamber 202 is also adjacent. The first metal closed switchgear 100 is provided below the partition plate 142. That is, the breaker chamber 201 and the cable / current transformer chamber 202 are formed lower than the lower breaker chamber 101 and the cable / current transformer chamber 102 in the adjacent first metal closed switchgear 100. Yes.

  In the first common pressure release chamber 205 on the circuit breaker chamber 201, the partition plate 240 a is arranged to face the front surface of the panel main body 204 in parallel at a predetermined interval, and the lower end thereof is the partition plate of the circuit breaker chamber 201. The upper end of 241 is joined to the top plate 245 of the panel body 204. As shown in FIG. 4, partition plates 251 and 252 are provided inside the first common pressure release chamber 205 and divided into three chambers. Specifically, the partition plates 251 and 252 have an inclined portion that is inclined toward the pressure release chamber and a vertical portion that is connected to the inclined portion. The lower end of the inclined portion of the left partition plate 251 is joined to the side plate 247 of the board main body 204 on the left side when viewed from the front and in the vicinity of the upper portion of the partition plate 241 of the circuit breaker chamber 201. In addition, the upper end of the vertical portion of the partition plate 251 is joined to the top plate 245. Further, similarly, the lower end of the inclined portion of the right partition plate 252 is joined to the side plate 247 of the panel main body 204 on the right side when viewed from the front and near the upper portion of the partition plate 241 of the circuit breaker chamber 201. Further, the upper end of the vertical portion of the partition plate 252 is joined to the top plate 245.

  Even inside the second pressure release chamber 206 on the cable / current transformer chamber 202, it is divided into three chambers by the partition plates 261 and 262, similarly to the first pressure release chamber 205 described above.

  In the bus bar chamber 203, the lower end of the partition plate 243 is joined to the back surface portion of the circuit breaker chamber 201 of the partition plate 244, and the upper end of the partition plate 243 is joined to the top plate 245 of the panel main body 204. For this reason, the formed busbar chamber 203 differs from the busbar chamber 103 of the first metal closed switchgear 100 in that it is a panel including the top plate 245 of the panel body 204. A bus 231 is disposed in the bus bar chamber 203 via a lever. In the cable / current transformer chamber 202, a current transformer 223 is attached behind the circuit breaker chamber 201.

  By the way, the top plate 245 of the panel main body 204 is provided with a first common pressure release chamber 205, a second common pressure release chamber 206, and an in-board discharge opening 210 connected to the bus bar chamber 203. For example, a pressure release flapper 209 that is a valve mechanism that is normally closed but opens in response to a pressure exceeding a certain limit is attached to each intra-panel discharge opening 210. On the other hand, the discharge opening 208 is provided in the partition plate 241 of the circuit breaker chamber 201 and the partition plate 242 of the cable / current transformer chamber 202 as pressure release means of the circuit breaker chamber 201 and the cable / current transformer chamber 202, respectively. Yes. With this discharge opening 208, the circuit breaker chamber 201 is connected to the first common pressure release chamber 205, and the cable / current transformer chamber 202 is connected to the second common pressure release chamber 206.

  Further, the side plate 247 of the panel main body 204 constituting the first common pressure release chamber 205 is discharged to a position facing the discharge opening 108 provided on the adjacent surface of the adjacent first metal closed switchgear 100. An opening 208 is provided. Similarly, on the side plate 247 of the panel body 204 constituting the second common pressure release chamber 206, at a position facing the discharge opening 108 provided on the adjacent surface of the adjacent first metal closed switchgear 100, A discharge opening 208 is provided. Through this discharge opening 208, the lower circuit breaker chamber 101 of the adjacent first metal closed switchgear 100 is connected to the first common pressure release chamber 205, and the lower cable / current transformer chamber 102 is also connected to the second The common pressure release chamber 206 is connected. Accordingly, each of the common pressure release chambers 205 and 206 partitioned by the partition plates 251, 252, 261, and 262 described above has an independent pressure release path together with the corresponding discharge openings 208 as shown in FIG. Is configured.

Next, the operation of the embodiment of the metal closed switchgear of the present invention described above will be described with reference to FIGS.
For example, when an internal arc accident occurs in the circuit breaker chamber 101 in the lower stage of the first metal closed switchgear 100 disposed on the left side of the front view of FIGS. 1 and 4, the expansion occurred due to a sudden increase in internal pressure. Air passes through the discharge opening 208 provided in the left plate 247 of the first common pressure release chamber 205 of the second metal closed switchgear 200 adjacent to the discharge opening 108 provided in the right plate 147 of the circuit breaker chamber 101. Then, it is discharged to the first common pressure release chamber 205. Since the first common pressure release chamber 205 is independent from the other discharge openings 208 by the partition plates 251 and 252, the released expanded air does not flow into the other circuit breaker chamber 201, for example. The released expanded air passes through the in-board discharge opening 210 provided in the top plate 245 of the upper panel body 204 above the first common pressure release chamber 205, and passes through the pressure release flapper 209 attached to the in-board discharge opening 210. Operated and released out of the board. An internal arc accident in the lower circuit breaker chamber 101 of the first metal closed switchgear 100 arranged on the right side of the front view and an internal arc accident in the circuit breaker chamber 201 of the second metal closed switchgear 200 are also present. Corresponding as well.

  In addition, when an internal arc accident occurs in the lower cable / current transformer chamber 102 of the first metal closed switchgear 100 on the left side when viewed from the front, the air expanded due to a sudden rise in internal pressure Through the discharge opening 208 provided in the left side plate 247 of the second common pressure release chamber 206 of the second metal closed switchgear 200 adjacent to the discharge opening 108 provided in the right side plate 147 of the flow chamber 102, It is discharged into the second common pressure release chamber 206. Since the second common pressure release chamber 206 is independent of the other discharge openings 208 by the partition plates 261 and 262, the discharged expanded air does not flow into the other cable / current transformer chamber 202, for example. . The released expanded air passes through the in-panel discharge opening 210 provided in the top plate 245 of the panel main body 204 at the upper part of the second common pressure release chamber 206, and passes through the pressure release flapper 209 attached to the in-board discharge opening 210. Operated and released out of the board. An internal arc accident in the lower cable / current transformer chamber 102 of the first metal closed switchgear 100 and the cable / current transformer chamber 202 of the second metal closed switchgear 200 arranged on the right side of the front view. Internal arc accidents at are also handled in the same way.

  Further, when an internal arc accident occurs in the bus bar chamber 103 of the first metal closed switchgear 100 arranged on the left side when viewed from the front, the air expanded due to a sudden increase in internal pressure is connected to the second The metal closed switchgear 200 is discharged into the bus bar chamber 203. The discharged expanded air passes through the in-panel discharge opening 210 provided in the top plate 245 of the top panel body 204 in the upper part of the bus bar chamber 203, and operates the pressure release flapper 209 attached to the in-board discharge opening 210. Released outside the board. An internal arc accident in the busbar chamber 103 of the first metal closed switchgear 100 disposed on the right side in front view is similarly handled.

  Next, another embodiment of the metal closed switchgear of the present invention will be described with reference to FIGS. FIG. 5 is a side view of a second metal closed switchgear constituting another embodiment of the metal closed switchgear of the present invention, and FIG. 6 is a cross-sectional view taken along line BB in FIG. In these drawings, the same reference numerals as those in FIGS. 1 to 4 denote the same parts. The second metal closed switchgear 200 in the present embodiment is different from the second metal closed switchgear 200 in the first embodiment in the following points, and the other points are common.

  In the first and second common pressure release chambers 205 and 206, the partition plates 251, 252, 261 and 262 are not provided. Therefore, each common pressure release chamber has a single rectangular parallelepiped shape and is different from the common pressure release chambers 205 and 206 in the above-described embodiment in which the inside is divided into three sections.

  Further, for example, in the first common pressure release chamber 205, the discharge opening 208 provided in the partition plate 241 of the circuit breaker chamber 201 for connection to the circuit breaker chamber 201, and the adjacent first metal closed switchgear 100 A pressure release flapper 207, which is a valve mechanism that is normally closed but opens in response to a pressure exceeding a certain limit, is attached to the discharge opening 208 provided in the both side plates 247 to connect to the lower circuit breaker chamber 101. ing. Similarly, in the second common pressure release chamber 206, the discharge opening 208 provided in the partition plate 242 of the cable / current transformer chamber 202 for connection to the cable / current transformer chamber 202, and the adjacent first metal A valve mechanism that is normally closed to a discharge opening 208 provided on both side plates 247 to connect to the lower cable / current transformer chamber 102 of the closed switchgear 100 but opens in response to a pressure exceeding a certain limit. A pressure relief flapper 207 is attached. Therefore, each common pressure release chamber is different from the common pressure release chambers 205 and 206 in the above-described embodiment in which the pressure release flapper is not provided in that three pressure release flappers are provided.

  In the above-described embodiment, the inclined portions of the partition plates 251, 252, 261, and 262 can be formed in an arc shape.

Next, the operation of another embodiment of the metal closed switchgear of the present invention described above will be described with reference to FIGS.
For example, when an internal arc accident occurs in the lower circuit breaker chamber 101 in the lower stage of the first metal closed switchgear 100 arranged on the left side of the front view in FIGS. 1 and 6, the expansion occurred due to a sudden increase in internal pressure. From the discharge opening 208 provided in the left plate 247 of the first common pressure release chamber 205 of the second metal closed switchgear 200 adjacent to the discharge opening 108 provided in the right plate 147 of the circuit breaker chamber 101. The pressure release flapper 207 is operated and discharged to the first common pressure release chamber 205. Since the pressure release flapper 207 is provided for each discharge opening 208 inside the first common pressure release chamber 205, the pressure release flapper 207 of the other discharge openings 208 is closed, and the discharged expanded air is, for example, other It will not flow into the circuit breaker chamber 201 of the circuit. The released expanded air passes through the in-board discharge opening 210 provided in the top plate 245 of the upper panel body 204 above the first common pressure release chamber 205, and passes through the pressure release flapper 209 attached to the in-board discharge opening 210. Operated and released out of the board. An internal arc accident in the lower circuit breaker chamber 101 of the first metal closed switchgear 100 arranged on the right side of the front view and an internal arc accident in the circuit breaker chamber 201 of the second metal closed switchgear 200 are also present. Corresponding as well.

  In addition, when an internal arc accident occurs in the lower cable / current transformer chamber 102 of the first metal closed switchgear 100 on the left side when viewed from the front, the air expanded due to a sudden rise in internal pressure The pressure release flapper from the discharge opening 208 provided in the left side plate 247 of the second common pressure release chamber 206 of the second metal closed switchgear 200 adjacent to the discharge opening 108 provided in the right side plate 147 of the flow chamber 102. 207 is operated and discharged to the second common pressure release chamber 206. Since the inside of the second common pressure release chamber 206 is provided with a pressure release flapper 207 for each discharge opening 208, the pressure release flapper 207 of the other discharge openings 208 is closed, and the discharged expanded air is, for example, other It does not flow into the cable / current transformer chamber 202. The released expanded air passes through the in-panel discharge opening 210 provided in the top plate 245 of the panel main body 204 at the upper part of the second common pressure release chamber 206, and passes through the pressure release flapper 209 attached to the in-board discharge opening 210. Operated and released out of the board. An internal arc accident in the lower cable / current transformer chamber 102 of the first metal closed switchgear 100 and the cable / current transformer chamber 202 of the second metal closed switchgear 200 arranged on the right side of the front view. Internal arc accidents at are also handled in the same way.

  Further, when an internal arc accident occurs in the bus bar chamber 103 of the first metal closed switchgear 100 arranged on the left side when viewed from the front, the air expanded due to a sudden increase in internal pressure is connected to the second The metal closed switchgear 200 is discharged into the bus bar chamber 203. The discharged expanded air passes through the in-panel discharge opening 210 provided in the top plate 245 of the top panel body 204 in the upper part of the bus bar chamber 203, and operates the pressure release flapper 209 attached to the in-board discharge opening 210. Released outside the board. An internal arc accident in the busbar chamber 103 of the first metal closed switchgear 100 disposed on the right side in front view is similarly handled.

  Therefore, in the metal closed type switchgear 300 configured in this way, even if an internal arc accident occurs in any section, the expanded air generated by the accident can be discharged to the outside.

  According to the above-described metal closed switchgear of the present invention, even if an internal arc accident occurs in any chamber in the metal closed switchgear, the expanded air generated by the accident can be discharged to the outside. Further, the common pressure release chamber is provided by being partitioned inside the metal closed type switchgear. For this reason, the common pressure release chamber has the same strength and the like as the other chambers, and sufficient safety and reliability are ensured. Further, the external dimensions of the metal closed switchgear are the same as the external dimensions of the conventional metal closed switchgear. Therefore, even when a large number of feeders are required, it is possible to install a metal closed type switchgear in which circuit breakers and the like are loaded in multiple stages with substantially the same installation area as the conventional example. Furthermore, even if it is a type provided with a common pressure release chamber, it is possible to add a system, and since it is simple, it is excellent in versatility. It is also possible to form a pressure release chamber integrally above the second metal closed switchgear 200 to form a unit.

  In the embodiment of the metal closed switchgear of the present invention described above, the first metal closed switchgear 100 has two surfaces and the first metal closed switchgear 200 has one metal closed switchgear. Although it is configured, if the first metal closed switchgear 100 and the second metal closed switchgear 200 are arranged in a row, the configuration may be one by one.

It is a perspective view which shows the structure of one Embodiment of the metal closed type switchgear of this invention. It is a side view of the 1st metal closure type switchgear which constitutes one embodiment of metal closure type switchgear of the present invention. It is a side view of the 2nd metal closure type switchgear which constitutes one embodiment of metal closure type switchgear of the present invention. It is sectional drawing which looked at the metal closed type switchgear of this invention shown in FIG. 1 from the IV-IV arrow. It is a side view of the 2nd metal closed type switchgear which comprises other embodiment of the metal closed type switchgear of this invention. It is sectional drawing which looked at the metal closed type switchgear of this invention shown in FIG. 5 from the VI-VI arrow.

Explanation of symbols

100 First metal closed switchgear 101 Breaker chamber 102 Cable / current transformer chamber 103 Busbar chamber 104 Panel body 108 Discharge opening 109 Pressure release flapper 110 Discharge opening in panel 141 Partition plate 200 Second metal closed switchgear 201 Circuit breaker chamber 202 Cable / current transformer chamber 203 Busbar chamber 204 Panel body 205 First common pressure release chamber 206 Second common pressure release chamber 207 Pressure release flapper 208 Release opening 209 Pressure release flapper 210 Board release opening 241 Partition plate 300 Metal closed switchgear

Claims (4)

A circuit breaker room loaded in the vertical direction of the board surface, each containing a circuit breaker,
A bus room that is arranged at the back of the circuit breaker room and houses the bus in its panel;
A first metal-enclosed switchgear disposed on the back of the busbar chamber and having a cable and a current transformer chamber each containing a cable and a current transformer in the board;
From the partition plate in the panel of the lower circuit breaker chamber in the first metal closed switchgear, which is disposed on the side of the lower circuit breaker chamber of the first metal closed switchgear. A circuit breaker chamber containing a circuit breaker in a panel having a partition plate located below;
A bus room that is placed on the back of this circuit breaker room and houses the bus in its panel,
In the panel having a partition plate located below the partition plate in the panel of the lower cable / current transformer chamber in the first metal closed switchgear, which is arranged at the back of the busbar chamber A second metal-enclosed switchgear having a cable / current transformer chamber containing the current transformer;
The second metal closed type switchgear is disposed on the circuit breaker chamber and the cable / current transformer chamber, respectively. First and second common pressure release chambers for releasing internal pressure caused by an internal arc accident in the breaker chamber and the circuit breaker chamber and the cable / current transformer chamber of the second metal closed switchgear, respectively;
Between the partition plate in the panel of the lower circuit breaker chamber in the first metal closed switchgear and the partition plate in the panel of the circuit breaker chamber in the second metal closed switchgear. A side plate, a partition plate in the panel of the lower cable / current transformer chamber in the first metal closed switchgear, and the cable / current transformer chamber in the panel of the second metal closed switchgear. The side plate between the partition plate in the panel, the partition plate in the panel of the circuit breaker chamber in the second metal closed switchgear, and the cable and change in the second metal closed switchgear. To the partition plate in the panel of the flow chamber,
A metal closed switchgear comprising a discharge opening provided to communicate with the common pressure release chamber. The metal closed switchgear according to claim 1,
A metal closed type switchgear characterized in that a normally closed pressure release flapper that opens in response to a pressure exceeding a certain limit is provided in each of the discharge openings. The metal closed switchgear according to claim 1.
A metal closed switchgear characterized in that a partition for partitioning the common pressure release chamber for each pressure release opening is provided. The metal closed switchgear according to claim 1 to 3,
A metal-closed switchgear characterized in that a normally closed pressure release flapper that opens in response to a pressure exceeding a certain limit is provided on the ceiling of the first and second common pressure release chambers.

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