JP5368183B2 - Switchgear - Google Patents

Description

  The present invention relates to a switch gear that houses a drawer device such as a drawer-type circuit breaker, and particularly relates to a configuration of a main circuit portion.

  Generally, the switchgear panel is partitioned into a circuit breaker room, a busbar room, a cable room, and the like. As a conventional switchgear having such a compartment, for example, there is a multistage closed switchboard as shown in FIG. The circuit breaker chamber 52 that accommodates the multi-layered circuit breakers 51, the cable chamber 54 that accommodates the cable 53 on the side surface, and the bus chamber 56 that accommodates the bus bar 55 on the upper side are separated by a partition plate. It is partitioned. The partition plate 57 constituting the circuit breaker chamber 52 is made of a metal plate that also serves as a fixed frame for fixing the circuit breaker 51. The partition plate 57 is provided with insulating bushings 58a and 58b made of an insulating material and a lead terminal penetrating the insulating material. It is connected to the primary side (power supply side) terminal of the circuit breaker 51 via the bushing 58a via the branch bus 59 drawn vertically downward from the bus 55 arranged in the upper bus room 56. The next side (load side) terminal is connected to the cable 53 via the bushing 58b to form one main circuit (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 04-042710 (page 5, FIG. 9)

In the conventional switchgear shown in Patent Literature 1, the bus 55 accommodated in the bus chamber 56 is supported by an insulator, an insulating frame, or the like. A branch bus 59 and a connection conductor are required in the middle to the terminal connecting the bus 55 and the circuit breaker 51, and a connection conductor is also required from the circuit breaker 51 and the cable 53. The main circuit conductor length per circuit to the cable connection point becomes longer. In the meantime, it is necessary to arrange the conductors while securing the insulation distance between the phases and the ground, and there is a limit in reducing the size of the circuit breaker chamber 52, the busbar chamber 56, and the cable chamber 54.
In addition, it is difficult to reduce the size of the entire switchgear because it is necessary to secure an insulation distance from the partition plate when partitioning each chamber, and the conductor length of the main circuit portion is increased and the panel size is increased. There was a problem.

  The present invention has been made to solve the above-described problems, and it simplifies the connection path between the busbar and the vacuum circuit breaker, and the vacuum circuit breaker and the cable connection conductor, and reduces the main circuit conductor length per circuit. The object is to obtain a switchgear that is shortened to reduce the overall size.

The switchgear according to the present invention includes a circuit breaker chamber in which a circuit breaker is accommodated, a bus bar chamber in the rear of the circuit breaker chamber in which a bus bar is accommodated, an external cable located on the side of the circuit breaker chamber, and its external line In a switchgear in which a connection chamber for connecting a cable and a circuit breaker is accommodated, and a switchgear partitioned by a partition plate, a bottomed cylindrical first insulation is provided on the partition plate between the circuit breaker chamber and the busbar chamber. The support member is provided with the opening surface facing the circuit breaker side, the bottomed cylindrical second insulating support member is provided on the partition plate between the circuit breaker chamber and the cable chamber, and the opening surface is the first insulating support member. The bus bar provided in the same direction as the opening surface of the first insulating support member and supported by penetrating the side surface of the first insulating support member, and the contact of the primary conductor of the circuit breaker are disposed inside the first insulating support member. One end of the connection conductor inserted and supported by the second insulating support member and connected to the circuit breaker And the contact of the following side conductor, is connected in the second insulating supporting member is constructed main circuit module 1 circuit in the bus and the circuit breaker and the connection conductor and both the insulating support member, 2 a main circuit module The circuit segments are arranged at the same height, the bus bar chamber and the bus bar are shared, and the bus bars are supported by the first insulating support members of the main circuit modules for two circuits, and the whole is housed in one housing. It has been done.

According to the switchgear of the present invention, the first insulating support member having a bottomed cylindrical shape is provided on the partition plate between the circuit breaker chamber and the busbar chamber, and the bottomed cylindrical shape is provided on the partition plate between the circuit breaker chamber and the cable chamber. A second insulating support member is provided, and the bus bar and the contact of the primary conductor of the circuit breaker are connected inside the first insulating support member, and one end portion of the connection conductor inside the second insulating support member Is connected to the contactor of the secondary side conductor of the circuit breaker, and the bus circuit, the circuit breaker, the connection conductor, and both insulating support members constitute one circuit main circuit module, and the two circuit circuits of the main circuit module are identical. Since it is arranged at a height, the busbar chamber and the busbar are shared, the busbars are supported by the first insulating support members of the main circuit modules for two circuits, and the whole is housed in one housing , Connection path between busbar and circuit breaker, and circuit breaker and cable connection conductor is simplified and supported Since fewer reduce the support part. Further, it is possible to shorten the main circuit conductor length per circuit, further, the generatrix of the support easily a Runode, it is possible to achieve a reduction in overall switchgear.

1 is a plan sectional view of a switchgear according to Embodiment 1 of the present invention. It is a perspective view which shows the main circuit module in FIG. It is a perspective view which shows the connection condition of the vacuum circuit breaker and bus-bar in FIG. 1, and a vacuum circuit breaker and a connection conductor. It is a top sectional view of a switchgear according to Embodiment 2 of the present invention. It is a top sectional view of a switchgear according to Embodiment 3 of the present invention. It is a top sectional view of a switchgear according to Embodiment 4 of the present invention. It is front sectional drawing which shows the structure of the conventional switchgear.

Embodiment 1 FIG.
Hereinafter, the switchgear according to the first embodiment will be described with reference to FIGS.
As shown in the plan view of FIG. 1, the switch gear includes a housing 1 in which the interior of the housing 1 is located behind the circuit breaker chamber 20 in which the vacuum circuit breaker 2 is accommodated and the circuit breaker chamber 20 as viewed from the front side. 3 is accommodated in the bus room 30, an external cable (not shown) on the side of the circuit breaker room 20 (corresponding to the cable 53 of FIG. 7 described in the background section), and the external cable and the vacuum circuit breaker 2. Are connected to the cable chamber 40 in which the connection conductor 4 is accommodated, and each chamber is partitioned by the partition plates 1a to 1c.

  The vacuum circuit breaker 2 includes, for example, a vacuum valve (not shown) in which a fixed electrode and a movable electrode are accommodated in a vacuum vessel, and a drive device (not shown) that drives the movable electrode. It is comprised and is arrange | positioned horizontally in the circuit breaker chamber 20 toward the width direction of the housing | casing 1 so that a movable axis line may be turned. And the primary side (power supply side) conductor 2a is derived | led-out from the fixed electrode side, and the contactor 2b is provided in the front-end | tip part. Similarly, a secondary side (load side) conductor 2c is led out from the movable side electrode, and a contact 2d is provided at the tip thereof. The length of the secondary conductor side 2c is shorter than the length of the primary conductor side 2a. As shown in FIG. 1, the vacuum circuit breaker 2 is configured by integrating the primary conductor 2a and the contact 2b, and the secondary conductor 2c and the contact 2d together with the main body.

A first insulating support member 5 having a bottomed cylindrical shape (details will be described later) is provided on the partition plate 1a between the circuit breaker chamber 20 and the busbar chamber 30 with the opening surface 5b facing the conductor side of the vacuum circuit breaker 2. It has been. The partition plate 1a is also opened in accordance with the opening surface 5b.
In addition, although each partition plate 1a-1c consists of an insulating plate or a metal plate, and is being fixed to the flame | frame which is not shown in figure, it is called a partition plate also including a flame | frame in the following description.
The bus bar 3 accommodated in the bus bar chamber 30 is arranged in parallel with the vacuum circuit breaker 2 with the longitudinal direction in the horizontal direction and the horizontal plane in the width direction of the housing 1. The bus bar 3 arranged in the horizontal direction is supported by penetrating through a through hole 5a (see FIG. 2) provided on the side surface of the first insulating support member 5, and the bus bar 3 and the primary conductor 2a of the vacuum circuit breaker 2 are supported. The contact 2b is connected to the inside of the first insulating support member 5 so as to be insertable / removable.

  The partition plate 1b between the circuit breaker chamber 20 and the cable chamber 40 is partially bent and has a surface parallel to the partition plate 1a on the bus bar chamber 30 side. The insulating support member 6 is provided with the opening surface 6 b facing in the same direction as the first insulating support member 5. The second insulating support member 6 is also provided with a through hole 6a (see FIG. 2) on one side surface, and one end portion 4a of the connection conductor 4 connected to the external cable is inserted into the through hole 6a. It is supported. The one end 4a and the contact 2d of the secondary conductor 2c of the vacuum circuit breaker 2 are connected to be detachable inside the second insulating support member 6.

The connection conductor 4 is bent in a U-shape, and the other end portion is a cable connection portion 4b connected to an external cable (not shown). The connecting conductor 4 and the bus bar 3 are not only supported by the two insulating support members 5 and 6, but are appropriately supported by the housing 1 with a support insulator or the like, but are not shown.
The partition plate 1 c between the bus bar chamber 30 and the cable chamber 40 is formed by extending the partition plate 1 a that partitions the bus bar chamber 30 and the circuit breaker chamber 20 in the width direction of the housing 1.

  As described above, in the switchgear according to the first embodiment, the main circuit module of one circuit is constituted by the bus 3, the vacuum circuit breaker 2, the connecting conductor 4, and the two insulating support members 5 and 6, and the vacuum circuit breaker 2 Of the connecting conductor 4 connected directly to the secondary side of the vacuum circuit breaker 2 and the external line cable, while directly connecting the primary side and the bus 3 inside the first insulating support member 5 provided on the partition plate 1a. One end portion 4a is directly connected to the inside of the second insulating support member 6 provided on the partition plate 1b, so that a compact main circuit module is obtained. Hereinafter, the configuration will be described in more detail.

FIG. 2 is a perspective view of the switch circuit of FIG. In the figure, a case of three phases is shown, and a one-phase vacuum circuit breaker 2 and a bus 3 arranged in parallel thereto are arranged in the order of R, S, and T phases from the top.
As shown in the detailed view, the first insulating support member 5 has a rectangular bottomed cylindrical shape, and through holes 5a through which the bus bar 3 passes are provided on both side surfaces, and a partition is formed on the opening surface 5b side. A flange for attachment to the plate 1a is formed. The same applies to the second insulating support member 6, but the through hole 6 a into which the connection conductor 4 is inserted has only one side surface and is vertically oriented. In addition, although the case where the through-hole 6a was provided in the side surface is shown in the figure, it is not limited to a side surface, You may make it provide in a back surface and insert from a back surface.

Since the length of the primary side conductor 2a of the vacuum circuit breaker 2 is longer than the length of the secondary side conductor 2c, the connecting portion between the secondary side conductor 2c and the connection conductor 4 is connected to the bus 3 and the vacuum circuit breaker 2 It becomes possible to arrange | position between.
In the connection conductor 4 bent in a U-shape, the length of the bent portion on the cable connection portion 4b side is made the longest in the R phase, and sequentially shortened in the S phase and the T phase. By bending in a U-shape, three-phase external cables can be arranged side by side in the depth direction (front-rear direction) of the cable chamber 40, and by changing the length of the bent portion, the position of the external cable connection point is Since it is displaced in the direction, it is easy to connect the external cable.

FIG. 3 is a perspective view in which both insulating support members 5 and 6 are removed from the main circuit module of FIG. 2 so that the internal connection state can be seen.
The connection portion between the primary contact 2b and the bus 3 and the connection portion between the secondary contact 2d and the connection conductor 4 are basically the same, although the connection directions differ between horizontal and vertical. The connection part seen in the arrow direction in a figure is shown in the enlarged view on behalf of the connection part of the contact 2b and the bus-bar 3 of the primary side. As shown in the figure, the contact 2b has a spring property at the tip of the primary conductor 2a and is fixed to both sides of the plate thickness, and the bus bar 3 can be inserted and removed between them.
Since both the opening surfaces 5b and 6b of the both insulating support members 5 and 6 are arranged toward the conductors 2a and 2c side of the vacuum circuit breaker 2, the vacuum circuit breaker 2 can be taken in and out from the front side of the housing 1. It has a so-called drawer shape.

A procedure for assembling the main circuit module unit to the housing 1 in the switchgear configured as described above will be described.
First, the partition plates 1a to 1c that divide the circuit breaker chamber 20, the busbar chamber 30, and the cable chamber 40 are attached. Next, the first insulating support member 5 and the second insulating support member 6 are attached to the partition plates 1a and 1b. Next, the bus bar 3 is inserted into the through hole 5a of the first insulating support member 5 and supported. Further, the one end portion 4 a of the connection conductor 4 is inserted into the through hole 6 a of the second insulating support member 6 and supported. Next, the vacuum circuit breaker 2 is pushed in from the front side, and the primary contact 2b is inserted into the first insulating support member 5 to be connected to the bus 3, and at the same time, the secondary contact 2d is It is inserted into the second insulating support member 6 and connected to the one end 4 a of the connection conductor 4.
The assembled state is the state of FIG. The first insulating support member 5 has a function of supporting the bus bar 3 and serves to partition the circuit breaker chamber 20 and the bus bar chamber 30. Similarly, the second insulating support member 6 has a function of supporting the connection conductor 4 and functions to partition the circuit breaker chamber 20 and the cable chamber 40.

As described above, according to the switchgear according to the first embodiment, the first insulating support member having a bottomed cylindrical shape is provided on the partition plate between the circuit breaker chamber and the busbar chamber, and the partition between the circuit breaker chamber and the cable chamber is provided. the bottomed cylindrical second insulating supporting member provided in the plate, internally as well as connecting the contacts of the primary conductor of the cross unit shielding the generatrix of the first insulating supporting member, a second insulating support member of internally connecting the contacts of the secondary side conductor sectional unit shielding an end portion of the connecting conductor, since constituting the main circuit module 1 circuit in the bus and breakers connecting conductor and the two insulating support members , bus and breakers, and, together with the connection path breakers and the cable connecting conductor is simplified, thereby reducing the support component so requires less support. In addition, since the main circuit conductor length per circuit can be shortened, the entire switch gear can be reduced.

Embodiment 2. FIG.
FIG. 4 is a plan sectional view of the switchgear according to the second embodiment. The same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
As shown in the figure, the switchgear according to the present embodiment is arranged so that two main circuit modules having the same shape as described in the first embodiment are arranged in the left-right direction with the vacuum circuit breaker 2 side as the front side. The bus bar chamber 31 and the bus bar 7 are made common, and the whole is housed in one housing 8.

The common bus 7 is penetrated by the first insulating support member 5 of each main circuit module and supported at two points on the left and right sides, and the primary contact 2b of each vacuum circuit breaker 20 and the first insulation It is connected inside the support member 5. Therefore, insulators such as an insulator and an insulating frame for supporting the bus bar 7 are not necessary. Further, it is possible to easily obtain a two-circuit switchgear using a main circuit module having a short main circuit length.
Furthermore, when it is necessary to connect one external cable while the bus 7 is in a charged state, the cable chamber 40 is also partitioned for each circuit. So you don't accidentally touch the cable on the non-working side.

  As described above, according to the switchgear of the second embodiment, two main circuit modules having the same shape are arranged side by side in the left-right direction, the bus room and the bus are shared, Since the bus is supported by the first insulating support member and the whole is housed in one housing, the support of the bus is simplified, and the switchgear having a short main circuit length and a reduced main circuit length is reduced. Can be obtained.

Embodiment 3 FIG.
FIG. 5 is a plan sectional view of the switchgear according to the third embodiment. The same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
Two main circuit modules of the same shape as those described in the first embodiment are arranged side by side in the front-rear direction (depth direction of the housing) with the busbar sides back to back, and the busbar chamber 32 and busbar 3 are shared. The bus bar 3 is supported by the first insulating support members 5 of both main circuit modules, and the whole is housed in one housing 9. That is, the vacuum circuit breaker 2 is connected to the same bus 3 from the front side and the back side.

  The vacuum circuit breaker 2 can be taken in and out from the front side and the back side, and by making the bus bar chamber 32 and the bus bar 3 common, it is possible to suppress an increase in the depth dimension. Since the first insulating support members 5 are disposed at two locations in the width direction of the housing 1 with respect to the bus 3, an insulator for supporting the bus is not necessary.

  As described above, according to the switchgear of the third embodiment, the two main circuit modules having the same shape are arranged in the front-rear direction with the busbar sides back to back, the busbar chamber and the busbar are shared, The bus bars are supported by the first insulating support members of the circuit modules, and the whole is housed in a single housing, so that the bus bars can be easily supported, each compartment can be made compact, and the depth and panel width dimensions are reduced. Thus, it is possible to obtain a two-circuit switchgear having a short main circuit length.

Embodiment 4 FIG.
FIG. 6 is a plan sectional view of a switchgear according to the fourth embodiment. 1 and 5 of the first and third embodiments are denoted by the same reference numerals, description thereof will be omitted, and differences will be mainly described.
The switchgear of the present embodiment has two main circuit modules arranged in the front-rear direction as in the third embodiment, but the two-circuit main circuit modules are not exactly the same shape, but symmetrically. It is formed. This is arranged in the front-rear direction with the bus-bar sides back to back, and the bus-bar chamber 32 and the bus-bar 3 are shared. Since the positions of the first insulating support members of both main circuit modules are the same, the first insulating support member 10 is formed integrally, and the bus bar 3 is passed through and supported at the center of the side surface, so that the whole is integrated. It is accommodated in one casing 9.

Since the front and rear circuit breaker chambers 20 need to be partitioned, the first insulating support member 10 has a partition 10a at the center.
Compared to the third embodiment, since the bus 3 is supported at one point, it is necessary to support the other end using a support lever or the like, but the connection portion with the external cable is the same as that of the housing 9. Since it is on the side, it is easy to route the external cable.

  As described above, according to the switchgear of the fourth embodiment, the two circuit portions of the main circuit module formed symmetrically are arranged in the front-rear direction with the busbar sides back to back, and the busbar chamber and the busbar are shared. In addition, since the first insulating support members of both main circuit modules are integrally formed, the bus bar is supported through the center of the side surface, and the whole is housed in one housing, the same as in the third embodiment In addition to the effects, the external cable can be easily routed.

In the first to fourth embodiments, the vacuum circuit breaker has been described as having three phases. However, in the case of three phases, as shown in FIGS. Alternatively, the three phases may be housed in a single container and configured integrally. In the case of three phases, the first insulating support member and the second insulating support member may also have a three-phase integrated structure.
The vacuum circuit breaker is not limited to three phases, and may be a single phase.
Furthermore, although the first and second insulating support members have been described as square, the shape is not limited to a square but may be a circle or a polygon as long as it is cylindrical.

DESCRIPTION OF SYMBOLS 1, 8, 9 Housing | casing 1a-1c Partition plate 2 Vacuum circuit breaker 2a Primary side conductor 2b, 2d Contact 2c Secondary side conductor 3,7 Bus 4 Connection conductor 4a One end part 4b Cable connection part 5,10 1st Insulation support member 5a, 6a Through hole 5b, 6b Opening surface 6 Second insulation support member 10a Partition 20 Breaker room 30, 31, 32 Bus room 40 Cable room.

Claims (4)

A circuit breaker chamber in which the circuit breaker is accommodated; a bus room in the rear of the circuit breaker room in which the busbar is accommodated; an external cable located on the side of the circuit breaker room; the external cable; and the circuit breaker In the switchgear in which the cable chamber in which the connecting conductor for connecting is housed is partitioned by the partition plate,
A first insulating support member having a bottomed cylindrical shape is provided on a partition plate between the breaker chamber and the busbar chamber, with an opening surface facing the breaker side,
A second insulating support member having a bottomed cylindrical shape is provided on a partition plate between the circuit breaker chamber and the cable chamber, with an opening surface facing in the same direction as the opening surface of the first insulating support member,
The bus bar supported through the side surface of the first insulating support member and the contact of the primary conductor of the circuit breaker are connected inside the first insulating support member,
One end of the connection conductor inserted and supported by the second insulating support member and a contact of the secondary conductor of the circuit breaker are connected inside the second insulating support member,
A main circuit module of one circuit is constituted by the bus bar, the circuit breaker, the connection conductor, and both the insulating support members ,
The two circuit portions of the main circuit module are arranged at the same height, and the busbar chamber and the busbar are used in common, and the busbars are provided by the first insulating support members of the main circuit modules for the two circuits. Is supported, and the switchgear is housed in a single casing . The switchgear according to claim 1, wherein
Wherein the main circuit module 2 circuit component includes switchgear, characterized in that it is arranged in the lateral direction in the front side of the breaker. The switchgear according to claim 1, wherein
Wherein the main circuit module 2 circuit component includes a switch gear being characterized in that disposed in the longitudinal direction and the bus side back to back. The switchgear according to claim 1, wherein
The main circuit modules for the two circuits are formed symmetrically, are arranged in the front-rear direction with the busbar sides back to back, and the first insulating support members of the main circuit modules for the two circuits are integrated. switchgear the bus through the side surface center portion, characterized in that it is supported is formed.