JPH0750966B2 - Gas insulated switchgear - Google Patents

Description

The present invention relates to a gas-insulated switchgear, and more particularly to a gas insulated switchgear, in which a connecting busbar connecting a bushing connected to a power transmission line and a power transmission line unit is arranged substantially parallel to a main busbar. Gas insulated switchgear.

[Prior Art] Generally, a gas-insulated switchgear has a linear main bus, and has a transmission line unit having one end connected to the main bus and the other end connected to a transmission line. Moreover, at the other end of the power transmission line unit on the power transmission line side, a connecting bus bar is generally provided, and the connecting bus bar connects between the bushing connected to the power transmission line and the power transmission line unit.

A gas insulated switchgear of this type is known in Japanese Utility Model Application Laid-Open No. 57-61911, in which a bushing and a transmission line unit are connected by a connecting busbar arranged orthogonally to the main busbar. Are connected. According to this structure, the axial length of the connecting bus bar can be shortened, but the axial length of the main bus bar having a branching portion and required to have high performance is increased.

In order to solve this problem, a breaker, a current transformer, a disconnector, a grounding switch, and a lightning arrester are provided on a vertical plane orthogonal to the main bus, as in the gas insulated switchgear disclosed in Japanese Utility Model Publication No. 53-33826. It is desirable to construct a transmission line unit by connecting each component equipment such as a transformer for instrument and the like.

A transmission line unit having such a configuration is shown in FIG. In other words, the double main buses 3 arranged in a line and juxtaposed.
Each component of the transmission line unit is arranged on one vertical plane orthogonal to A and 3B. A vertical circuit breaker 1 is arranged on one side of the main busbars 3A, 3B. The lower terminal of the circuit breaker 1 is connected to the main busbar 3A via the disconnector 4A and to the main busbar 3B via the disconnector 4B. It is connected. On the other hand, the upper terminal of the circuit breaker 1 is connected to the connecting bus bar 8 via the upper electric circuit 20 having the disconnecting switch 4 and the earthing switch 5, and the lightning arrester 6 and the instrument transformer 7 are connected to the upper electric circuit 20. Has been done.

[Problems to be Solved by the Invention] However, even if configured as described above, the configuration is such that the connection busbar 8 that connects between the upper electric circuit 20 of the transmission line unit and the bushing is provided substantially parallel to the main busbars 3A, 3B. In the above, the installation area of the gas insulated switchgear is increased.

This point will be further described with reference to FIG. 9 which is a plan view of the gas insulated switchgear constructed according to the conventional concept.

Foundation constructed in consideration of the installation area of gas insulated switchgear
Double main buses 3A and 3B linearly arranged are juxtaposed on each other, and a plurality of units are formed on a plurality of vertical planes orthogonal to the main buses 3A and 3B. Especially the transmission line unit L ₁ , L
Paying attention to ₂ , the connecting buses 8 and 9 that connect between the bushings 10 and 14 connected to the transmission line and the transmission line units L ₁ and L ₂ have portions substantially parallel to the main buses 3A and 3B. There is. Transmission line units L ₁ and L ₂ in the gas-insulated switchgear having such a configuration
If the structure shown in FIG. 10 is used as the structure, the structure protrudes by a dimension 1 in the direction perpendicular to the main buses 3A and 3B, which increases the installation area of the entire device. Moreover, as shown in FIG. 9, the transmission line unit L ₃ ,
When L ₄ is added, the dimension L between the additional connecting busbar 8A and the existing connecting busbar 9 becomes smaller, and it becomes impossible to carry in a wrecker vehicle for maintenance and inspection or additional work. .

An object of the present invention is to provide a gas-insulated switchgear capable of reducing the attached area in the direction orthogonal to the main bus.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides at least one of a lightning arrester and an instrument transformer other than a vertical plane substantially orthogonal to a main bus bar in which other constituent devices are arranged. It is characterized in that it is provided by being connected to the connecting bus bar at a position.

[Operation] Since the gas-insulated switchgear according to the present invention has the above-described configuration, the transmission line unit can be configured by excluding at least one of the constituent devices, the lightning arrester and the instrument transformer. It is possible to reduce the dimension in the direction orthogonal to the main bus line by the amount and reduce the attached area.

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

FIG. 1 is a plan view of a gas insulated switchgear according to an embodiment of the present invention.

Foundation that is configured according to the installation area of the gas insulated switchgear 18
Double main buses 3A and 3B, which are configured substantially linearly, are juxtaposed on top of each other, and a plurality of units are configured on a plurality of vertical planes orthogonal to these main buses 3A and 3B. That is, from the left side of the drawing, the transmission line unit L ₁ , the transformer unit T ₁ , the transmission line unit
L _2, the busbar Yunitsuto BT, bus PT Yunitsuto PT, transformer Yunitsuto T _2, the future additional portion transmission line Yunitsuto L _3, L ₄ the main bus 3A, 3B
Are juxtaposed in the axial direction. To the left of the main buses 3A and 3B, a steel tower 11 is established in parallel with the vertical planes of the above-mentioned units, and two power transmission lines (not shown) are retained in the steel tower 11. Two lines of bushings 10 and 14 are established to the right of the steel tower 11. The bushing 10 is connected to the transmission line unit L ₂ via the connecting bus 9, and the bushing 14 is connected to one end of the transmission line unit L ₁ via the connecting bus 8, both of which connecting buses 8 and 9 are main buses. 3
It has a part almost parallel to A and 3B.

The transmission line unit L ₂ has almost the same configuration as that of Fig. 10, and the components such as circuit breaker 1, disconnector 4, grounding switch 5, lightning arrester 6, instrument transformer 7, etc. are arranged on one vertical plane. Consists of

On the other hand, the transmission line unit L ₁ is basically the same as that shown in FIG. 10, but it is constructed by removing the instrument transformer 7 from the vertical plane where the other components are arranged. As shown in Fig. 1, the measuring instrument transformer 7 is a main busbar.
It is connected to the connecting bus bar 8 in a portion substantially parallel to 3A and 3B. As can be seen from FIG. 2 which is a cross-sectional view taken along line II-II of FIG. ₁ , the upper connecting busbar 8a connected to the upper electric circuit 20 of the transmission line unit L ₁ and the upper connecting busbar supporting and supporting the foundation 18. The lower connecting busbar 8b arranged in parallel with the 8a and the vertical connecting busbar 8c connecting the two are configured to form the connecting busbar 8, and the instrument transformer 7 is connected below the upper connecting busbar 8a. There is. Therefore, the main bus 3A, 3B of this transmission line unit L ₁
The dimension in the direction perpendicular to is smaller than that of the conventional example by the amount of the instrument transformer 7. The connecting busbar 9 arranged outside the connecting busbar 8 is reduced by the dimension of the transmission line unit L ₁ as described above, and as can be seen from a comparison with FIG. Since it can be arranged closer to the side, it is possible to reduce the size of the foundation 18 while increasing the facing distance (L + 1 ') with the additional connection bus bar 8A in the future.

Although not described, the transformer units T ₁ and T ₂ are respectively connected to the transformer 12 via connecting busbars 13 extending in a direction perpendicular to the main busbars 3A and 3B. In the above-mentioned embodiment, the transmission line units L ₃ and L ₄ which will be added in the future are also shown, but if the present embodiment is applied to the gas-insulated switchgear from which these are removed, the main bus lines 3A, 3B are similarly obtained. The installation area in the direction perpendicular to can be reduced. In addition, the configuration of FIG. 1 has two transmission line units L ₁ and L ₂ excluding future expansion, but in the case of one line, the configuration of transmission line unit L ₁ should be adopted. Therefore, the same effect can be obtained.

As described above, in the first embodiment, the arrangement space for the instrument transformer 7 is obtained by changing the connection configuration of the upper electric circuit 20 of the transmission line unit L ₁ and the connection bus 8. This structural change is apparent by comparing FIG. 11 which is a sectional view of the same portion in the conventional configuration shown in FIG. 9 with FIG. Space can also be obtained with other configurations, which are illustrated in FIGS. 3 and 4.

FIG. 3 is a plan view of a gas-insulated switchgear according to another embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, detailed description thereof will be omitted, and only different points will be described.

The gas-insulated switchgear according to this embodiment is a transmission line unit.
The position of the voltage transformer 7 for L ₁ is different from that of the previous embodiment. That is, in the embodiment of FIG. 1, the transmission line unit L ₁ at the connecting bus 8 arranged substantially parallel to the main buses 3A, 3B.
While the instrument transformer 7 is arranged on the transmission line unit L ₂ side of the configuration vertical plane of Fig. 3, in the embodiment of Fig. 3, the connection bus 8 is connected to the transmission line unit L ₁ rather than the configuration vertical plane. The instrument transformer 7 is arranged on the side of the bus bar 8 in the direction of lead-out. Therefore, as can be seen from FIG. 4 which is a cross-sectional view taken along the line IV-IV of FIG. 3, it becomes possible to dispose the _two transmission line units L ₁ and L ₂ in close proximity to each other. In the example, the position of the constituent vertical plane of the transformer unit T ₁ can be shifted in the axial direction of the main buses 3A, 3B so that both transmission line units L ₁ , L ₂ are juxtaposed side by side. On the other hand, in the embodiment shown in FIG.
Since both power transmission line units L ₁ and L ₂ cannot be juxtaposed side by side by the instrument transformer 7, both power transmission line units L ₁ and L ₂ cannot be juxtaposed.
It may be applied to a configuration in which another unit, for example, a transformer unit T ₁ is located between L ₁ and L ₂ .

According to the embodiment shown in FIGS. 3 and 4 described above, the foundation 18 must be made slightly larger in the axial direction of the main buses 3A and 3B, but the dimension in the direction perpendicular to the main buses 3A and 3B is first. The size can be reduced in the same manner as in the above embodiment.

FIGS. 5 and 6 show a gas-insulated switchgear according to still another embodiment of the present invention, in which two transmission line units are provided.
It is characterized in that connecting busbars 8 and 9 of L ₁ and L ₂ are vertically arranged in three dimensions. Both transmission line units L ₁ and L ₂ are connected in such a way that the components except the instrument transformer 7 are configured in a vertical plane perpendicular to the main buses 3A and 3B and are arranged substantially parallel to the main buses 3A and 3B. The transformer 7 for meters is connected to the busbars 8 and 9, respectively.

This will be further described with reference to FIG. 6 which is a sectional view taken along the line VI-VI of FIG. 5, and the connecting busbar 8 connected to the upper electric line 20L ₁ of the transmission line unit L ₁ has an intermediate portion thereof at the upper electric line 20L. ₁ consists of a substantially horizontal upper connecting busbar 8a connected to ₁ , a lower connecting busbar 8b attached near the foundation, and a vertical connecting busbar 8c connecting them, and is connected to the transmission line unit L ₂ side of the upper connecting busbar 8a. The voltage transformer 7 is connected. This is the same as the configuration shown in FIG. On the other hand, the upper line of the transmission line unit L ₂
Connection bus 9 connected to 20L _2, the bypass connections and the substantially upper connection bus 9a of the same level, which is connected to the upper path 20L _2, and is connected to the upper connection bus 9a disposed beyond the upper of the upper connecting bus bars 8a A bus bar 9d, a lower connecting bus bar 9b arranged above the lower connecting bus bar 8b in an overlapping manner, and a vertical connecting bus bar 9c connecting between the lower connecting bus bar 9b and the bypass connecting bus bar 9d. An instrument transformer 7 is connected to the transmission line unit L ₁ side. The connecting portion between the upper connecting busbar 9a and the bypass connecting busbar 9d is supported by the frame 15.

This embodiment is similar to the embodiment shown in FIG. 1 and FIG.
Connect the instrument transformer 7 of the transmission line unit L ₁ to the transmission line unit L ₂
Since it is arranged on the side, it is effective when another unit is arranged between both transmission line units L ₁ and L ₂ . Both connecting busbars
Since 8, 9 are arranged three-dimensionally, the facing distance (L + 2l ') with the connection bus bar 8A for future expansion can be made larger than that in the embodiment shown in FIG. 1, as shown in FIG. That is, the size of the gas insulated switchgear in the direction perpendicular to the main buses 3A and 3B can be further reduced. The sixth embodiment
As shown in the figure, the instrument transformers 7 of the two transmission line units L ₁ and L ₂ are arranged to the right of the vertical construction plane, but as shown in FIG. 4, they are located to the left of the vertical construction plane. The same effect can be obtained by arranging the instrument transformer 7 in the. At this time, the instrument transformer 7 of the transmission line unit L ₂ is arranged at the position of the instrument transformer 7 of the transmission line unit L ₁ in FIG. 6, and the instrument transformer 7 of the transmission line unit L _{1 is} the transmission line unit. It may be arranged between the constituent vertical plane of the unit L ₁ and the vertical connecting bus bar 8c.

FIG. 7 is a plan view of a gas-insulated switchgear according to a further different embodiment of the present invention. As with the embodiment of FIG.
7 and 8 are arranged three-dimensionally. In the embodiment shown in FIG. 5, the connecting busbar 9 is arranged above the connecting busbar 8, but in this embodiment, the connecting busbar 9 is arranged below the connecting busbar 8.

This will be described in more detail with reference to FIG. 8 which is a sectional view taken along the line VIII-VIII in FIG. 7. The transmission line unit L ₁ and the connecting busbar 8 have the same configuration as in FIGS. 2 and 6. On the other hand, the connecting bus bar 9 connected to the upper electric circuit 20L ₂ of the transmission line unit L ₂
Is basic and a lower connection bus 9b arranged in the underground portion 16 formed in the basement of mounting surface, an upper connection bus 9a disposed in substantially the same horizontal plane as the upper path 20L _2, vertical connection bus 9c for connecting these It consists of and.

According to this embodiment, as in the embodiment of FIG.
The gas insulated switchgear can be reduced in the direction perpendicular to A and 3B, and the distance (L + 2
l ′) can be increased. Moreover, the lower connecting busbar 9b located above the lower connecting busbar 8b in FIG. 6 can be accommodated in the underground burying portion 16, so that the height can be suppressed and the supporting frame or the like can be omitted.

In the embodiment shown in FIG. 8 described above, the connection bus bar 9 of the transmission line unit L ₂ located on the side opposite to the lead-out direction of the connection bus bar is stored in the underground burying section 16, but the connection bus bar 9 is As shown in the figure, in the case of arranging above the connecting bus bar 8, the connecting bus bar 8
May be stored in the underground burying section 16.

In each of the above-described embodiments, the instrument transformer 7 is removed from the vertical plane of the transmission line unit, and the instrument transformer 7 is arranged below the connecting buses 8 and 9. It may be arranged not only in the lower part, but may be arranged, for example, on the main buses 3A, 3B side of the connection buses 8, 9. Further, in each of the above-described embodiments, the instrument transformer 7 is removed from the vertical plane on which the components of the transmission line unit are arranged, but the lightning arrester 6 may be removed in place of the instrument transformer 7, and from the same vertical plane. Both the lightning arrester 6 and the instrument transformer 7 can be removed, and further, the present invention can be applied to a gas-insulated switchgear having only one of the lightning arrester 6 and the instrument transformer, and finally, the lightning arrester 6 and the instrument transformer. At least one of the containers 7 may be configured by removing it from the vertical plane on which the other components are arranged.

EFFECTS OF THE INVENTION As described above, according to the present invention, the transmission line unit is configured by removing at least one of the lightning arrester and the instrument transformer, on the vertical plane orthogonal to the main bus, and the components other than this are described above. Since it is provided by being connected to the connecting busbar arranged substantially parallel to the main busbar, it is possible to obtain a gas-insulated switchgear in which the protrusion is restricted in the direction perpendicular to the main busbar and the size is reduced in the same direction.

[Brief description of drawings]

1 is a plan view of a gas-insulated switchgear according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
FIG. 4 is a plan view of a gas-insulated switchgear according to another embodiment of the present invention, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a gas-insulated device according to a further embodiment of the present invention. FIG. 6 is a plan view of the switchgear, FIG. 6 is a sectional view taken along line VI-VI of FIG. 5, FIG. 7 is a plan view of a gas-insulated switchgear according to a further different embodiment of the present invention, and FIG. Sectional view along the line VIII-VIII in the figure, FIG. 9 is a plan view of a gas-insulated switchgear according to the conventional way of thinking, FIG. 10 is a front view showing a conventional transmission line unit,
FIG. 11 is a sectional view taken along the line XI-XI in FIG. 3A, 3B …… Main bus, 6 …… Lightning arrester, 7 …… Instrument transformer, 8,9 …… Connecting bus, 18 …… Foundation, L ₁ , L ₂ …… Transmission line unit, T ₁ , T ₂ ...... Transformer unit.

Claims (9)

[Claims] Claim: What is claimed is: 1. A transmission line unit having a substantially linear main bus and at least one of a lightning arrester and an instrument transformer, one end of which is connected to the main bus, and the other end of the transmission line unit. In a gas-insulated switchgear that is connected to the main bus bar and a connection bus bar that is arranged substantially parallel to the main bus bar, the transmission line unit excluding at least one of the lightning arrester and the instrument transformer, the main bus bar A gas-insulated switchgear configured on orthogonal vertical planes, wherein at least one of the lightning arrester and the instrument transformer is provided at a position other than the vertical plane and connected to the connection busbar. 2. The device according to claim 1, wherein one end of the connecting bus bar is configured to extend to the side opposite to the lead-out side from the vertical plane, and at least one of the lightning arrester and the instrument transformer is provided at this one end. A gas insulated switchgear characterized by being connected. 3. The device according to claim 1, wherein at least one of the lightning arrester and the instrument transformer is provided.
A gas-insulated switchgear arranged below the connection bus bar. 4. A transmission line unit having two main transmission lines, each main transmission line having at least one of a lightning arrester and a transformer for an instrument and having one end connected to the main transmission line, the transmission line unit having a main bus configured substantially linearly. A gas-insulated switchgear connected to each of the other ends of the transmission buses and having a connection bus arranged substantially in parallel with the main bus, the transmission line unit located on the side of the lead-out direction of the connection bus among the transmission line units. A component except at least one of the lightning arrester and the instrument transformer is configured in a vertical plane substantially orthogonal to the main bus, and at least one of the lightning arrester and the instrument transformer is other than the vertical plane. A gas insulated switchgear provided at a position connected to the connection bus bar. 5. The power transmission line unit according to claim 4, wherein the connection bus line connected to the transmission line unit located on the side of the connection bus line in the lead-out direction has the other transmission line than the vertical plane forming the transmission line unit. A gas-insulated switchgear which is configured to extend to the unit side, and at least one of the lightning arrester and the instrument transformer is connected to the extended portion. 6. The transmission line unit located on the side of the connecting bus bar in the lead-out direction according to claim 4, wherein at least one of the lightning arrester and the instrument transformer is connected to the lower part of the connecting bus bar. Gas-insulated switchgear characterized by. 7. The gas-insulated switchgear according to claim 4, wherein both of the connecting buses are arranged in a vertical plane substantially parallel to the main bus. 8. The gas insulation according to claim 7, wherein the other connecting bus bar is arranged above the connecting bus bar connected to the transmission line unit located on the side of the lead-out direction of the connecting bus bar. Switchgear. 9. The gas-insulated switchgear according to claim 7, wherein one of the connection buses is arranged in an underground buried portion formed underground.