JPH03218205A - Gas-insulated contactor - Google Patents

Abstract

PURPOSE:To reduce an installation area in the direction perpendicular to a main bus bar by connecting at least either an arrester or a potential transformer to a connecting bus bar at the position other than the vertical surface approximately perpendicular to the main bus bar. CONSTITUTION:Double main bus bars 3A and 3B formed approximately in line are positioned on the base formed depending upon an installation area for a gas-insulated contactor, and a circuit breaker, disconnecting device, ground contactor, arrester 6, potential transformer 7, etc., are laid on the vertical surface perpendicular to these main bus bars 3A and 3B. A space for the potential transformer 7 is obtained by changing a connection structure of an upper electric circuit of a transmission line unit L1 and a connecting bus bar 8. This enables forming the system by deleting at least either the arrester 6 or the potential transformer 7.

Description

[Detailed Description of the Invention] Field of Application of "Shi Industries" 1] The present invention relates to a gas insulated switchgear, and in particular, the present invention relates to a gas insulated switchgear, and in particular, a connection busbar connecting a bushing connected to a power transmission line and a power transmission line unit is arranged substantially parallel to the main busbar. Regarding the gas insulated switchgear installed.

[Prior Art] Generally, a gas insulated switchgear has a main bus line configured linearly, and a power transmission line unit connected at one end to the main bus line and connected at the other end to a power transmission line. Moreover, a connection bus bar is generally provided at the other end of the power transmission line unit on the power transmission line side, and the connection bus bar connects the sink connected to the power transmission line and the power transmission line unit.

As this kind of gas insulated switchgear
A system described in Japanese Patent No. J is known, in which a bushing and a power transmission line unit are connected by a connection bus bar arranged orthogonally to the main bus bar. According to this configuration, the axial length of the connection bus bar can be shortened, but the axial length of the main bus bar, which has a branch portion and requires high performance, increases.

To solve this problem, a circuit breaker, a current transformer, a disconnector, a grounding switch, It is desirable to construct a power transmission line unit by connecting each component such as a lightning arrester and a potential transformer.

A power transmission line unit configured in this manner is shown in FIG. In other words, each component of the power transmission line unit is arranged on one vertical plane orthogonal to the dual main buses 3A and 3B arranged in a straight line. A vertical circuit breaker 1 is arranged on one side of the main busbars 3A and 3B, and the lower terminal of this circuit breaker 1 is connected to the main busbar 3A via a disconnector 4A, and to the main busbar 3B via a disconnector 4B. It is connected. On the other hand, the upper terminal of the circuit breaker 1 is connected to the connection bus bar 8 via an upper electric line 20 having a disconnector 4 and a grounding switch 54, and a lightning arrester 6 and a voltage transformer 7 are connected to this upper electric line 20. It is connected.

[Problems to be Solved by the Invention] However, even with the configuration as described above, the connection busbar 8 that connects the upper electric circuit 20 of the power transmission line unit and the bushing is provided almost parallel to the main busbars 3A and 3B. In this case, the installation area of the gas insulated switchgear becomes large.

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

Double main busbars 3A, 3B configured in a straight line are arranged side by side on a foundation 18 that is constructed in consideration of the installation area of the gas insulated switchgear, and a plurality of vertical planes perpendicular to the main busbars 3A, 3B are arranged side by side. Consists of multiple units. Paying particular attention to the power transmission line units L1 and L2, the connection busbars 8 and 9 that connect the bushing 10.14 connected to the power transmission line and the power transmission line units L1 and L2 are substantially parallel to the main busbars 3A and 3B. have. The 10th transmission line unit L, L2 in the gas insulated switchgear with such a configuration is
If the configuration shown in the figure is used, the configuration will be such that it protrudes by a dimension Q in a direction perpendicular to the main busbars 3A, 3B, increasing the installation area of the entire device. Moreover, as shown in Fig. 9, power line units L,
, L4 is added, the dimension L between the additional connection busbar 8A and the existing connection busbar 9 becomes smaller, making it impossible for a tow truck or the like to be brought in for maintenance inspection or expansion work.

An object of the present invention is to provide a gas-insulated switchgear that can reduce the installation area in a direction perpendicular to the main bus bar.

[Means for Solving the Problems] In order to achieve the object of the present invention, at least one of the lightning arrester and the voltage transformer is arranged on a plane other than a vertical plane substantially orthogonal to the main bus bar on which other component devices are arranged. It is characterized in that it is connected to the connection bus bar at the position.

[Function] Since the gas insulated switchgear according to the present invention has a configuration such as a "double series", the power transmission line unit can be configured without at least one of the lightning arrester and the voltage transformer that are its constituent devices. , the dimension in the direction perpendicular to the main generatrices can be reduced by that amount, and the attached area can be reduced.

[Example] 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 1 constructed according to the installation area of gas insulated switchgear
8, double main busbars 3A, 3B configured almost linearly
are arranged side by side, and a plurality of units are configured in a plurality of vertical planes orthogonal to these main bus lines 3A and 3B. In other words, from the left side of the drawing, power line unit L1, transformer unit L-
T1, transmission line unit L2, busbar communication unit BT, busbar PT unit PT, transformer unit T2, and future addition transmission line units L3 and L4 are arranged in parallel in the axial direction of main buses 3A and 3B. 7 to the left of the main bus lines 3A and 3B? , the structure of each unit mentioned above.The steel tower 11 is parallel to the vertical plane.
has been established, and two power transmission lines (not shown) are tied to this steel tower 11. Bushings 10 and 14 for two circuits are installed on the right side of this steel tower 11. The bushing 1o is connected to the power transmission line unit L2 via the connection bus bar 9, and the bushing 14 is connected to one end of each of the power transmission line units 1-1, 2 via the connection bus bar 8. It has a portion that is substantially parallel to the main bus lines 3A, 3B.

The power transmission line unit L2 has almost the same configuration as that shown in FIG.
A grounding switch 5, a lightning arrester 6, a voltage transformer 7, etc. are arranged.

On the other hand, the power transmission line unit L1 is basically the same as that shown in FIG. The voltage transformer 7 is connected to a connecting bus 8 in a portion substantially parallel to the main buses 3A, 3B, as shown in FIG. Eighth? - As can be seen from FIG. 2, which is a sectional view taken along the TI-I1 line in the figure, the partially connected busbar 8a connected to the upper circuit 20 of the power transmission line units 1 to L, and supported to the foundation 18, The lower connection bus bar 8 is arranged parallel to the upper connection bus bar 8a.
b, and a vertical connection bus 8c that connects these two, forming a connection bus 8, and an instrument transformer 7 is connected to the lower part of the upper connection bus 8a. Therefore, the dimension of the power transmission line unit L in the direction perpendicular to the main buses 3A, 3B is reduced by the amount of the voltage transformer 7 compared to the conventional example.

Due to the above-described size reduction of the power transmission line units 1 to L, the connection busbar 9 disposed outside the connection busbar 8 is extended by a distance Q' to the main busbar 3A, as can be seen from a comparison with FIG. 9 showing the conventional example. , 3B, it is possible to reduce the size of the foundation 18 while increasing the facing distance (L+Q') from the connection bus 8A that will be added in the future.

Although the explanation will be different, the transformer units T, T2 include connection busbars 13 extending in a direction perpendicular to the main busbars 3A, 3B.
transformer] 2 are connected respectively? has been done. In addition, the above embodiment is based on power transmission line units L3 and L4 that will be added in the future.
However, if this embodiment is applied to a gas insulated switchgear without these, the installation area in the direction perpendicular to the main busbars 3A, 3B can be similarly reduced. Also the first
The configuration in the figure has transmission line units L1 and L2 that form two circuits, excluding future expansion, but in the case of one circuit,
A similar effect can be obtained by adopting the configuration of the power transmission line unit L.

As described above, in the first embodiment, the arrangement space for the potential transformer 7 is obtained by changing the connection configuration between the upper electric circuit 20 of the power transmission line unit L1 and the connection bus bar 8. This structural change is clear by comparing FIG. 11, which is a sectional view of the same part in the conventional configuration shown in FIG. 9, with FIG. 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, and the same numbers as those in FIG. 1 are used. The detailed explanation will be omitted and only the differences will be explained.

The gas insulated switchgear according to this embodiment differs from the previous embodiment in the position of the instrument transformer 7 of the power transmission line unit L2. That is, in the embodiment of FIG. 1, the main busbars 3A, 3B
Structure of power transmission line unit 1-L in connecting bus bar 8 arranged almost parallel to Structure of the power transmission line unit L in the connection bus 8 The voltage transformer 7 is located on the side of the connection bus 8 in the lead-out direction from the vertical plane.
are placed. Therefore, as can be seen from FIG. 4, which is a cross-sectional view taken along line IV-IV in FIG. Structure of Transformer Unit T■ By shifting the position of the vertical plane in the axial direction of the main busbars 3A, 3B, both power transmission line units L, L2 can be juxtaposed adjacent to each other.

On the other hand, in the embodiment shown in FIG. 1, both power transmission line units 1-L and 1-L2 are arranged side by side by means of the voltage transformer 7. Therefore, it is preferable to apply it to a configuration in which another unit, for example, a transformer unit T, is located between both power transmission line units L, l, and LZ.

According to the embodiment shown in FIGS. 3 and 4 described above, the foundation 18 must be made somewhat thicker in the axial direction of the main generatrix lines 3A, 3B, but the dimensions in the direction perpendicular to the main generatrix lines 3A, 3B are determined first. It can be reduced in the same way as the embodiment.

5 and 6 show a gas insulated switchgear according to still another embodiment of the present invention, in which two power line units L
1 and L2 connection busbars 8 and 9 are arranged three-dimensionally above and below. Both power transmission line units L, L2 are
Each component except the instrument transformer 7 is connected to the main bus 3A.
．． 3B and a vertical plane perpendicular to main bus line 3A.
, 3B are connected to connecting busbars 8 and 9, respectively, which are arranged substantially parallel to the connecting busbars 8 and 9.

To further explain with reference to FIG. 6, which is a cross-sectional view taken along line VI-VI in FIG.
The connection busbar 8 connected to 0L1 has an almost horizontal upper connection busbar 8a whose intermediate portion is connected to the upper electric circuit 20L, a lower connection busbar 8b attached near the foundation, and a vertical connection busbar that connects these two. 8c, and the voltage transformer 7 is connected to the power transmission line unit L2 side of the upper connection bus 8a.

This is the same configuration as shown in FIG. On the other hand, the connection bus 9 connected to the upper power line 20L2 of the power transmission line unit L2 is connected to the upper connection bus 1IIA9a at approximately the same level connected to the upper power line 20L2, and the upper connection bus 9a connected to the upper connection bus 9a. A bypass connection busbar 9d arranged beyond the upper part, a lower connection busbar 9b arranged overlappingly above the lower connection busbar 8b, and this lower connection busbar 9b.
and a vertical connection bus 9c that connects the bypass connection bus 9d.
An instrument transformer 7 is connected to the side opposite to the power transmission line unit L of the upper connection bus 9a. Upper connection bus bar 9a
The connection portion between the bypass connection busbar 9d and the bypass connection busbar 9d is supported by the frame 15.

This embodiment is similar to the embodiment shown in FIGS. 1 and 2;
Potential transformer 7 of power transmission line unit L1? electric wire unit h
Since it is located on the L2 side, both power transmission line units L,,L
This is effective when placing other units between the two. In addition, since both connection buses 8 and 9 are arranged three-dimensionally, as shown in Fig. 5, the facing distance (L + 2
f+. ') can be made even larger than in the embodiment of FIG. In other words, the main bus 3A in a cast insulation switchgear
, 3B can be further reduced. In addition, in this embodiment, as shown in FIG. 6, the voltage transformers 7 of both power transmission line units L-L, . . . A similar effect can be obtained by arranging the potential transformer 7 to the left of the vertical plane of the structure. At this time, the power transmission line unit L
The voltage transformer 7 of No. 2 is connected to the power transmission line unit l in FIG.
- The voltage transformer 7 of the power transmission line unit L1 may be placed at the position of the voltage transformer 7 of the power transmission line unit L2.

FIG. 7 is a plan view of a gas insulated switchgear according to still another embodiment of the present invention, in which connection busbars 7 and 8 are arranged three-dimensionally in the same way as the embodiment of FIG. 5.
In the illustrated embodiment, the connection bus bar 9 is arranged above the connection bus bar 8, but in this embodiment, the connection bus bar 9 is arranged below the connection bus bar 8.

To explain in more detail using FIG. 8, which is a sectional view taken along the line ■-■1 in FIG. It is the composition. on the other hand,
Transmission line unit L. The connection busbar 9 connected to the two-way electric circuit 20L2 is connected to the lower connection busbar 9b arranged in an underground section 16 formed underground on the foundation and attached surface, and the upper electric circuit 2
It consists of a -1 two-part connection busbar 9a disposed on substantially the same horizontal plane as OL, and a vertical connection busbar 9c connecting these two parts.

According to this embodiment, the main busbar 3
A.. The gas fiber switchgear can be reduced in the direction perpendicular to 3B, and the distance between it and the connection bus 8A for future expansion (
L+2D. ') can be increased. Moreover, the 6th
Since the lower connecting busbar 9b, which is located on one side of the lower connecting busbar 8b in the figure, can be stored in the underground buried portion 16, the height can be suppressed and a support frame or the like for supporting the lower connecting busbar 16 can be omitted.

In the embodiment shown in FIG. 8, which is a double series, the power transmission line unit T. However, in the configuration in which the connection bus 9 is placed on the -1 side of the connection bus 8 as shown in FIG. It may be stored in

Furthermore, in each of the above-mentioned embodiments, the voltage transformer 7 is removed from the vertical plane of the power transmission line unit, and the voltage transformer 7 is placed below the connection buses 8, 9. It can be placed not only at the bottom, but also at the connection busbar 8, for example.
It may be arranged on the main busbars 3A, 3B side of 9. Furthermore, in each of the above embodiments, the voltage transformer 7 is removed from the vertical plane on which the components of the power transmission line unit are arranged, but the lightning arrester 6 may be removed instead of the voltage transformer 7, and the voltage arrester 6 may be removed from the vertical plane. It can be applied to a gas-insulated switchgear that excludes both the lightning arrester 6 and the voltage transformer 70, or even has only one of the lightning arrester 6 and the voltage transformer. At least one of the transformers 7 may be configured so as to be removed from the vertical plane on which the other components are arranged.

[Effects of the Invention] As explained above, the present invention configures the power transmission line unit 1 by removing at least one of the lightning arrester and the voltage transformer on a vertical plane perpendicular to the main bus, and the removed component equipment. Since the gas insulated switchgear is connected to the connection bus bar arranged substantially parallel to the main bus bar, the protrusion in the direction perpendicular to the main bus bar is restricted and the gas insulated switchgear is reduced in the same direction.

[Brief explanation of drawings]

FIG. 1 is a plan view of a gas #4A edge switchgear according to an actual example of the present invention, and FIG. 2 is a sectional view taken along line nn of FIG.
FIG. 3 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 the line ■■ in FIG.
The figure is a plan view of a gas insulated switchgear according to still another embodiment of the present invention, FIG. 6 is a sectional view taken along line VI-VI in FIG. 5, and FIG.
Fig. 8 is a plan view of the edge switchgear, Fig. 8 is a cross-sectional view taken along line 1-1 is a sectional view taken along the line xr-xt in FIG. 9. 3A, 3B Main bus, 6 3f lightning device, 7 Potential transformer, 8, 9 - Connection bus, 18... Foundation, L,,L
2 Transmission line unit 1-, T,, T”2 transformer unit I
・.

Claims (1)

[Scope of Claims] 1. A power transmission line unit having a main bus configured in a substantially straight line, at least one of a lightning arrester and an instrument transformer, and having one end connected to the main bus, and this power transmission line unit. In a gas-insulated switchgear having a connection bus bar connected to the other end and arranged substantially parallel to the main bus bar, the power transmission line unit excluding at least one of the lightning arrester and the voltage transformer is connected to the main bus bar. A gas-insulated switchgear constructed on a vertical plane substantially perpendicular to the bus bar, and at least one of the lightning arrester and the potential transformer being connected to the connection bus bar at a position other than the vertical plane. Device. 2. In the device according to claim 1, one end of the connection bus bar is configured to extend toward the opposite side from the vertical plane, and at least one of the lightning arrester and the voltage transformer is connected to this one end. A gas insulated switchgear featuring: 3. The gas insulated switchgear according to claim 1, wherein at least one of the lightning arrester and the voltage transformer is disposed below the connection bus bar. 4. A main bus configured in a substantially straight line, two power transmission line units having at least one of a lightning arrester and an instrument transformer and each having one end connected to the main bus, and each other of these power transmission line units. In a gas-insulated switchgear having a connection busbar connected to an end and arranged substantially parallel to the main busbar, the lightning arrester and the meter of the transmission line unit located on the side in the direction in which the connection busbar leads out of both the power transmission line units. The components other than at least one of the voltage transformers are arranged on a vertical plane substantially orthogonal to the main bus, and at least one of the lightning arrester and the voltage transformer is arranged on a vertical plane other than the vertical plane. A gas insulated switchgear characterized by being connected to a connecting busbar. 5. In the device according to claim 4, the connection busbar connected to the power transmission line unit located on the lead-out direction side of the connection busbar is located on the other power transmission line unit side with respect to the vertical plane that constitutes the power transmission line unit. 1. A gas insulated switchgear characterized in that it is configured to be extended, and at least one of the lightning arrester and the voltage transformer is connected to the extended portion. 6. The power transmission line unit located on the lead-out direction side of the connection bus bar has at least one of the lightning arrester and the voltage transformer connected to the lower part of the connection bus bar. gas insulated switchgear. 7. The device according to claim 4, wherein both the connecting busbars are
A gas insulated switchgear characterized in that it is arranged on a vertical plane substantially parallel to the main bus bar. 8. The gas insulated switchgear according to claim 7, wherein the other connection busbar is disposed above the connection busbar connected to the power transmission line unit located on the lead-out direction side of the connection busbar. 9. The gas insulated switchgear according to claim 7, wherein one of the connection busbars is disposed in an underground section formed underground.