KR20090080123A - Switchgear - Google Patents

Abstract

[PROBLEMS] To provide a switchgear exhibiting excellent workability of inspection, wiring, and the like, without increasing the dimensions of the housing of the switchgear. [MEANS FOR SOLVING PROBLEMS] The housing (100) of a switchgear (1) is provided with a first substantially vertical wall body (101) located between a main bus chamber (30) and a circuit breaker chamber (20), a second wall body (102) opposing the first wall body (101) through the internal space of the main bus chamber (30), and a third wall body (103) located between the main bus chamber and a cable chamber (40) and having a slope portion (1031) extending and inclining downward from the second wall body side to the first wall body side, wherein the main bus (301) of at least one phase out of the main buses of a plurality of phases is secured to the first wall body so as to extend substantially in the horizontal direction, and the main buses (302, 303) of other phases are secured to the second wall body so as to extend substantially in the horizontal direction.

Description

Switchgear {SWITCHGEAR}

The present invention relates to a switch gear in which a breaker is accommodated in a case.

This type of conventional switchgear includes a breaker chamber for accommodating a breaker, a cable chamber for accommodating a cable arranged at the rear of the breaker chamber and connected to a load, The main bus bar chamber | room which accommodates the main bus bar arrange | positioned above and connected to a power supply is provided, These chambers are partitioned by the partition board. Each of the three-phase busbars housed in the main busbar chamber is provided in parallel to the horizontal direction at intervals in the vertical direction on the side surfaces of the same partition plate. The connection between the breaker and the cable housed in the cable chamber is performed by the load side connecting conductor, but this branch conductor is extended from the connection position with the load side terminal provided under the breaker to the rear of the breaker. In order to secure the connection distance with the cable, the cable is stretched upward and then connected to the cable (see Patent Document 1, for example).

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-350442

[Initiation of invention]

[Problems that the invention tries to solve]

In the conventional switchgear configured as described above, since the main buses of the respective phases are arranged in parallel in the horizontal direction through the vertical gaps, the main busbar chamber accommodating the main busbars is Certain dimensions in the vertical direction for the placement of the main bus bar are necessary. Therefore, in order to suppress the dimension of the vertical direction of the case of a switchgear, the circuit breaker arrange | positioned under the main busbar must be installed in the vicinity of the bottom surface of a case, and the inspection and wiring in the cable chamber located behind the breaker chamber | seat are carried out. In order to perform such work, the cable seal cannot be accessed even when the breaker is once taken out of the case from the bottom of the case. . In addition, if the breaker is provided near the middle of the case in consideration of workability such as inspection, the size of the case in the vertical direction is increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems in the conventional switchgear, and does not increase the dimensions of the case of the switchgear and further provides a switchgear having excellent workability such as inspection and wiring. The purpose.

The switchgear according to the present invention includes a main busbar chamber accommodating a plurality of phase busbars connected to a power source, a cable chamber accommodating a cable connected to a load, and the A switchgear having a case having a breaker seal electrically connected between a main bus line and the cable, the breaker seal housing a breaker for opening and closing a converter from the power supply to the load, the case being the main bus bar. A first wall located between the seal and the breaker seal and substantially perpendicular to the first wall, a second wall opposed to the first wall through an inner space of the main busbar seal, and between the main busbar seal and the cable seal. A third wall having an inclined portion located at and extending inclined downward from the second wall side to the first wall side, wherein the main bus line of the plurality of phases is provided; At least one main line on is fixed to the stretching (延伸) in a substantially horizontal direction to the wall of the first, main bus bars on the other is fixed so as to extend in a substantially horizontal direction to the wall of the second.

[Effects of the Invention]

According to the switchgear according to the present invention, the case of the switchgear is provided with a first wall which is located between the main busbar seal and the breaker seal and is substantially perpendicular to the first wall and the first wall opposing the first wall through the inner space of the main busbar seal. And a third wall having an inclined portion extending between the second wall and the main busbar thread and the cable thread and inclined downward from the second wall side to the first wall side, and having a plurality of phases of the main busbar. The main busbar of at least one of the phases is fixed to extend in the substantially horizontal direction to the first wall, and the main busbar of the other phase is fixed to extend in the substantially horizontal direction to the second wall, so that the first wall At least a portion of the main busbar of at least one phase of the main busbars fixed to the second busbar and the main busbar of at least one phase of the main busbars fixed to the second wall overlap at least partially in the horizontal direction. Can be placed against the rock for which, without there happen to the case dimensions in the vertical direction of the switch gear large, to obtain a workability is excellent switchgear, such as check or wire it is possible to increase the space in the case.

1 is a cross-sectional view of a switch gear according to Embodiment 1 of the present invention.

It is explanatory drawing for demonstrating arrangement | positioning of the main bus bar of the switchgear which concerns on Embodiment 1 of this invention.

It is explanatory drawing for demonstrating the main bus bar seal of the switchgear which concerns on Embodiment 1 of this invention, and its vicinity.

It is explanatory drawing for demonstrating the cable thread of the switchgear which concerns on Embodiment 1 of this invention, and its vicinity.

Preferred Mode for Carrying Out the Invention

Embodiment 1.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the switchgear which concerns on Embodiment 1 of this invention, FIG. 2 is explanatory drawing for demonstrating arrangement | positioning of the main bus bar of the switchgear which concerns on Embodiment 1 of this invention, FIG. 3 is embodiment of this invention. Explanatory drawing for demonstrating the main bus bar seal of the switchgear by 1, and its vicinity. FIG. 4 is explanatory drawing for demonstrating the cable seal of the switchgear which concerns on Embodiment 1 of this invention, and its vicinity.

1 to 4, the switch gear 1 is provided with a metal substantially box-shaped case 100, and inside the case 100, a breaker chamber for accommodating a pull-out circuit breaker 202 (in the case 100). 20) and a main busbar chamber accommodating the main busbar 301 of the first phase connected to the three-phase power source, the main busbar 302 of the second phase, and the main busbar 303 of the third phase ( 30, a cable seal 40 for storing the first phase cable 403, the second phase cable 404, and the third phase cable 405 connected to the load, and a protection relay (not shown). The control room 50 which accommodates a meter etc. is provided. The breaker chamber door 201, the cable chamber door 401, and the control chamber door 501 which can be opened and closed are respectively provided on the front portions of the breaker chamber 20, the cable chamber 40, and the control chamber 50.

The breaker chamber 20 is partitioned from the main busbar chamber 30 and the cable chamber 40 by metal partition plates 101 and 104 having substantially vertical wall surfaces. In addition, the breaker chamber 20 is provided with the breaker support body 205 which supports the draw-out type | mold breaker 202 at the substantially interruption part of the case 100 in the vertical direction. The breaker support 205 also serves as a partition between the breaker chamber 20 and the cable chamber 40.

The pull-out circuit breaker 202 accommodated in the circuit breaker chamber 20 is provided on the circuit breaker support body 205 via the some wheel 203,204. The draw-out circuit breaker 202 displays the power supply side terminal (only one pole is shown in FIG. 1) 207 of each three-phase pole and the load side terminal (only one pole is shown in FIG. 1) of each three-phase pole. 208, and a vacuum switch (not shown) of each three-phase pole is connected in series between these terminals 207 and 208.

In the partition plate 102, each bushing (only one phase is shown in FIG. 1) at a position facing the power supply terminal 207 of each three-phase pole of the drawout circuit breaker 202 (2013) (2013) 1) is fixed to the power supply side fixed terminal (only one phase in Fig. 1) 2011, and each bushing is positioned at a position opposite to the load side terminal 208 of each of the three-phase poles of the draw-out circuit breaker 202. The load-side fixed terminal (only one phase is shown in Fig. 1) 2012 is fixed through (only one phase is shown in Fig. 1) 2014.

The draw-out circuit breaker 202 moves the draw-out circuit breaker 202 to the left direction from the state shown in FIG. 1 by rotating the screw 206 by the handle which is not shown in figure, The power supply side terminal 207 and the load side terminal. 208 can be removed from the power supply side fixed terminal 2011 and the load side fixed terminal 2012. In addition, the pull-out circuit breaker 202 in the pulled-out state is moved in the right direction in the drawing by rotating the screw 206 in the opposite direction to the above, and the power supply terminal 207 and the load terminal 208 correspond to each other. Can be connected to the power supply side fixed terminal 2014 and the load side fixed terminal 2012.

The power-side shutter 209 of each phase installed in correspondence with the power supply-side fixed terminals 2011 of each phase and the load-side shutter 210 of each phase installed in correspondence with the load-side fixed terminals 2012 of each phase have a draw-out circuit breaker 202 on the left side of the drawing. When drawn out, the openings of the respective bushings 2013 and 2014 are closed and shielded so that the power supply side fixed terminal 2011 and the load side fixed terminal 2012 of each phase are not exposed in the breaker chamber 20. . The power source side shutter 209 and the load side shutter 210 are each comprised by the shielding plate formed integrally with three phases so that the terminal of three phases may be covered collectively.

The three-phase main busbars 301, 302, 303 housed in the main busbar chamber 30 are each constituted by flat conductors, and among these main busbars, the main busbar 301 of the first phase has a partition plate ( It is fixed to the wall surface of 101 by the insulator 304 so that it may be extended in a horizontal direction. The main busbar 302 of the second phase and the main busbar 303 of the third phase are formed of a metal partition plate 102 having a substantially vertical wall surface that partitions the main busbar thread 30 and the cable thread 40. It is fixed to the wall surface so that it may extend in a horizontal direction via insulators 305 and 306, respectively, and the 3rd main busbar 303 may be lowered at predetermined intervals in the vertical direction with respect to the main busbar 302 of the 2nd phase. Installed in The main busbar 301 of the first phase fixed to the partition plate 101 and the main busbar 302 of the second phase fixed to the partition plate 102 face each other through a space in the main bus bar chamber 30. Since they are fixed at the same position in the vertical direction, they are arranged to overlap each other in the horizontal direction.

In the main busbar chamber 30, power supply side connection conductors 3011, 3021 and 3031 made of flat conductors connecting the main busbars 301, 302 and 303 of each phase to the power supply-side fixed terminals 2011 corresponding to the respective phases are provided. It is stored. These power supply-side connection conductors 3011, 3021, 3031 are fixed to the partition plate 101 via an insulator (only one phase is shown in Fig. 1) 307.

The metal partition plate 103 is provided between the main bus bar thread 30 and the cable chamber 40, one end is connected to the partition plate 102, and the partition plate 103 is formed from the partition plate 102 side. The inclination part 1031 which inclines downward and extends to the side of 101 and 104 is provided. The other end side of the partition plate 103 is connected to the partition plate 104. In addition, you may comprise the partition plates 102 and 103 by the integral metal plate.

In Embodiment 1 of the present invention, the partition plate 101 constitutes a first wall, the partition plate 102 constitutes a second wall, and the partition plate 103 constitutes a third wall. have.

The three-phase cables 403, 404, 405 stored in the cable chamber 40 are connected to a load (not shown) and inserted into the cable chamber 40 from through holes provided in the bottom surface 411 of the case 100 of the switchgear. It is introduced and supported by a cable support (shown in FIG. 1 only one phase portion) 409. The cables 403, 404, 405 of each phase are connected to load side connection conductors 481, 482, 483 of each phase constituted by a flat conductor through a cable terminal (only one phase is shown in Fig. 1) 406, respectively. The load side connecting conductors 481, 482, 483 of each phase are connected to the load side fixed terminals 2012 of the corresponding phases, respectively.

The load-side connecting conductors 481, 482, 483 of each phase are fixed to the inner wall of the case 100 by the insulators 471, 472, 473, and the vertical stretching portions 4811, 4821, 4831 extending in the vertical direction, and the inclined portion of the partition plate 103. An inclined stretching portion (only one phase in FIG. 1 is shown) 4832 extending in substantially parallel to 1031 is provided.

CTs (491, 492, 493) of each phase are penetrated by vertical stretching portions (4811, 4821, 4831) of load side connecting conductors (481, 482, 483). The ground switch (shown only one phase in FIG. 1) 410 is connected to the load side connecting conductors 481,482,483, respectively, and the draw-out circuit breaker 202 is shown in the drawing for the inspection of the switch gear 1 or the like. When drawn out in the left direction, the load side connecting conductors 481, 482, 483 and the like are grounded for safety.

Since the breaker seal 20 is installed above the vertical interruption of the case 100, the worker opens the cable seal door 401 and removes the inner cover 402 to release the cable seal 40. You can carry out the work inside.

The switchgear 1 according to Embodiment 1 of the present invention configured as described above opens and closes the vacuum switch built in the draw-out circuit breaker 202 by a control device stored in the control chamber 50, Control of opening and closing of electric power supplied from the main buses 301, 302, 303 to the load via the cables 403, 404, 405 is performed. In addition, in the case of performing work such as maintenance, inspection, or troubleshooting of the equipment stored in the case 100 of the switch gear 1, the control room door 501, the breaker room door 201, One or all of the cable room doors 401 are opened to work on the equipment stored in the room.

When working in the cable chamber 40, first, the pull-out circuit breaker 202 is pulled out to the left direction of FIG. 1 by rotating the screw 206, and the pull-out circuit breaker 202 The power supply side terminal 207 and the load side terminal 208 are removed from the power supply side fixed terminal 2011 and the load side fixed terminal 2012, and the connection between the main buses 301, 302, 303 and the cables 403, 404, 405 is cut off. In parallel with this, the ground switch 410 is turned on, and the cables 403, 404, 405, load side connecting conductors 481, 482, 483, and the like are grounded. Next, in the cable chamber 40 in this state, necessary work in the inside is performed.

According to the switchgear of Embodiment 1 of the present invention mentioned above, the main busbar 301 fixed to the partition board 101 which is a 1st wall, and the main board fixed to the partition board 102 which is a 2nd wall are mentioned. Since the bus bar 302 is disposed to face each other so as to overlap in the horizontal direction, the draw-out circuit breaker 202 is connected to the case 100 without increasing the vertical dimension of the case 100 of the switch gear 1. Cables in the cable chamber 40 and other devices can be disposed in the middle of the vertical direction, and thus from the front side of the case 100 through the bottom surface 411 of the cable chamber 40. It is possible to perform the necessary work for the switchgear can be obtained excellent workability.

For example, if the inclined portion 1031 is not provided in the partition plate 103, the upper space of the cable chamber 40 is largely blocked by the vertical wall and the horizontal wall of the partition plate 103. Although the space of the chamber 40 becomes narrow, according to Embodiment 1 of this invention, the inclination part which inclines downwards from the partition plate 102 side to the partition plates 101 and 104 side to the partition plate 103 is extended. Since 1031 is provided, the upper space of the cable chamber 40 becomes wider, and the connection between the cables 403, 404, 405 and the drawout breaker 202 is substantially parallel to the inclined portion 1031 of the partition plate 103. Can be carried out via a connecting conductor having an inclined stretch portion 4832 extending in the shape of the wire. As a result, the depth of the cable seal 40, that is, the dimensions in the front and rear directions of the case 100 can be reduced. The switch gear 1 can be miniaturized.

The switchgear of this invention is used as a switchgear provided with the breaker which opens and closes control of electric power supply to a load from the main bus line connected to an electric power system in the field of heavy electricity.

Claims (4)

A main bus bar chamber accommodating a plurality of phases of the main bus bar connected to a power supply, a cable bar accommodating a cable connected to a load, the main bus bar and the cable A switchgear having a case having a circuit breaker chamber electrically connected between a circuit breaker and a circuit breaker housing a circuit breaker for opening and closing a converter from the power supply to the load. A first wall located between and substantially vertical, a second wall facing the first wall through an inner space of the main bus chamber, and located between the main bus chamber and the cable chamber. A third wall having an inclined portion extending inclined downward from the wall side of the wall to the first wall side, wherein at least one of the main buses of the plurality of phases has a main wall; The bus bar is fixed to the first wall to extend in a substantially horizontal direction, and the main bus bar of the other phase is fixed to extend to the second wall in a substantially horizontal direction. The method according to claim 1, The connection between the cable and the breaker is performed via a connecting conductor having an inclined stretching portion extending in substantially parallel to the inclined portion of the third wall. The method according to claim 1, A main bus bar on at least one of the main busbars fixed to the first wall and a main bus bar on at least one of the main busbars fixed to the second wall are at least horizontally through the inner space of the bus bar chamber. A switch gear, characterized in that the portion is disposed facing each other so as to overlap. The method according to any one of claims 1 to 3, The breaker is a draw-out breaker, which is connected to the main bus bar and the cable of the plurality of phases when inserted into the first wall side, and is disconnected when the connection is drawn out from the first wall side. .

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