JPS59113705A - Gas insulated switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a gas insulated switchgear, and particularly to a single bus type gas insulated switchgear having a sectional disconnector.

[Prior art]

A system as shown in FIG. 1 is known as a circuit configuration for substations and switchyards.

A switchgear for a feeder of a gas insulated switchgear is constituted by an insulation lead-out means 1 such as a punching and an insulation lead-out means 2 such as a cable at its ends. There are disconnectors D81. on both sides of the circuit breaker CDI. ．． DS2 is open, and the other end of the disconnector D82 is connected to the live mother a3. In this way, for example, a line side feeder is configured.

A breaker a3 is connected to a breaker DS 3t via a breaker CB2.
is connected to the insulation lead-out means 2 via a disconnector DS4'z, and in this way, for example, a feeder on the transformer 4 side is configured.

A plurality of such feeders are arranged in stages and separated by a separation switch DS4 provided in the middle of the raw mother a3.

FIGS. 2 and 3 show gas insulated switchgear corresponding to FIG. 1, and the details thereof will be described only for one phase of the three-phase alternating current.

L-? Disconnector cB1. CB2, disconnector D S 1. DS
The 2° DS3 are arranged approximately on the same axis. Main busbar 3
are arranged perpendicularly below the axis. According to this example, the insulation deriving means 1 is a punching type, and has a predetermined air insulation distance between phases or between adjacent feeder switching devices. Therefore, the main bus bar 3 connecting the feeder switchgears is extra long by the axial length t corresponding to the air insulation distance.

Conventionally, in order to compensate for this drawback, a sectional disconnector DS4' was provided in the middle of the main bus 3 as shown in the figure.

By the way, the gas insulated switchgear corresponding to the circuit diagram of FIG. 1 has many configurations. For example, the insulation lead-out means 1 may be connected by a cable or a gas insulated bus bar called GIB. In such a case, there is no need to consider the air insulation distance between adjacent feeder switchgears, and the breaker CDI" can be moved closer to the top of the diagram. Correspondingly, the sectional disconnector DS4 It is also necessary to configure the three phases at the same location.

It is also conceivable that the main bus bar 3 is of a three-phase type.

However, in either case, the divisional disconnect switch DS4 is configured on the main bus 3 between adjacent feeder switchgears, so the main bus 3 has many connections and branching parts, and the cost of this division bus increases. It gets expensive. In addition, separation switch DS4
As a result, the axial length of the main busbar 3 was also increased.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas-insulated switchgear in which the structure of the main bus bar between feeder switchgears is simplified.

[Summary of the invention]

The present invention provides a seagull having a dividing disconnector integrated with a switching device constituting a feeder. A. By substantially eliminating the space required in the axial direction of the main bus bar for the conventional sectioning equipment, the length of the main bus bar can be shortened, and the main bus bar can have a simple linear configuration.

[Embodiments of the invention]

The present invention will be explained below with reference to embodiments shown in the drawings. Fourth
The figures and FIG. 5 show an embodiment in which the insulation lead-out means 1 is a cable and the main bus 3 is a three-phase wire type. The invention can be applied.

In-phase insulation derivation means 1, disconnector DS1, breaker CBI
, disconnector DS2. D83, breaker CB2, and insulation lead-out means 2 are directly arranged on substantially the same horizontal line. This is the same as in FIGS. 2 and 3. Sectional disconnector D
S4 is arranged on the same axis.

Next, the specific configuration of the divisional disconnector DS4 will be explained with reference to FIG. Disconnector DS2. DS3 generally uses the same configuration known as a straight line disconnector, and the opposite sides are each insulated. It is sealed by 5 and 6. A disconnector container 7 is provided between the insulating spacers and the main bus bar 3, and an insulating spacer 8 separates the two in terms of gas. A stator 9 is supported and fixed to the insulating spacer 8 . The insulating spacer 5.6 is equipped with a disconnector DS2. A collector 10 serving as a connection between the DSs 3 is supported, and the movable element 1, which is in constant contact with the collector 10, is driven via a link mechanism 12 and opened and closed with respect to the stator 9.

According to such a configuration, the disconnector DS2. DSa is always electrically connected via the current collector 10, satisfying the electrical circuit shown in FIG.

FIG. 8 shows disconnectors DS2' and DS3' connected to the first circuit breaker and the circuit breaker CB1' of FIG.

The configurations of these disconnectors, except for the disconnector DSJ shown in FIG.
3 is always connected, and the conductor 14 is connected between this conductor 13 and the main bus bar 3.
The other configurations are the same.

Therefore, disconnector DS2. A sectional disconnector DS4 is connected in series in the middle of the main busbar 3 in FIG. It can be seen that the configuration described above corresponds to the circuit shown in FIG.

As can be seen from FIG. 4, the divisional disconnector DS4 is a series of line-side feeder switching devices centered on the breaker CBI, and bank-side feeder switching devices centered on the breaker CB2. By incorporating it into the structure, the gap between the live mother@3 becomes a linear structure with no branching parts other than the connecting parts with the respective feeder opening/closing devices, and the cost can be reduced. Moreover, it is possible to arrange other feeder switchgears around the breaker CBI' in close proximity, and the axial length of the main bus bar 3 can be shortened.

As mentioned above, the present invention is applicable to the main bus 3 having a phase-separated type, the insulation deriving means 1 and 2 using other alternative means, and the breaker CBI and the disconnectors DS1 on both sides thereof.
．． In the configuration of D82, both ends of the breaker CDI are led out above it, and both ends of the breaker CBI are led out to the sides, so that it can be applied to a structure in which the breaker and the disconnector are configured in two different straight lines. . FIG. 6 shows one such modification, in which the ends of the circuit breakers CBI and CB2 are guided upward, and the circuit breakers D81 to 3 are installed at the right angles formed between the circuit breakers CBI and CB2 and the resulting dividing circuit disconnector DS4. According to this example, all the disconnectors can have the same structure. Furthermore, the main bus bar 3 may be arranged above the divisional disconnector DS4. Further, the present invention omit the insulating spacer 8 shown in FIGS. 7 and 8, and the container 7 and the container of the main bus 3 are integrated, and the disconnection section consisting of the stator 9, the movable element 11, etc. is connected to the main bus. If you lower the figure and configure it in the container of 3,
The overall height can be reduced.

Therefore, the present invention can be applied to a gas insulated switchgear which has feeder switchgears on both sides of the main bus bar 3 and connects the series connection portion of the disconnector DS2 and the disconnector D83 to the live bus a3.

〔Effect of the invention〕

As described above, according to the present invention, since the divisional disconnector DS4 is provided at the connection between the feeder switching device and the main bus,
The main bus 3 includes a branch part for connection to a feeder switchgear,
There is no need to share the connection branch with the sectional disconnect switch.
Its configuration can be simplified.

[Brief explanation of drawings]

Figure 1 is a circuit diagram of a gas insulated switchgear which is the object of the present invention, Figure 2 is a diagram based on Figure 1 (a diagram of a conventional gas insulated switchgear), and Figure 3 is a front view of Figure 2. , FIG. 4 is a plan view of a gas insulated switchgear according to one embodiment of the present invention, FIG. 5 is a front view of FIG. 4, and FIG. 6 is a front view of a gas insulated switchgear according to another embodiment of the present invention. , Fig. 7 is a sectional view of the main part of Fig. 5, Fig. 8
The figure is a partially sectional front view of FIG. 6. CBI, CB2... Breaker, D81-3... Disconnector, DS4... IFr line switch for classification 1■, 2... Insulation lead-out means, 3... Main bus, 9... Fixed Child, lo...
・Collector, 11...Mover. 4th z 8su 5trn

Claims (1)

[Claims] 1. Configure feeder switchgears on both sides of the main busbar, connect the connection between the disconnectors of both feeder switchgears to the main busbar, and connect the connection section with other adjacent feeder switchgears. A sectional disconnect switch is provided between the main bus and the connection section, and the connection section is connected to the main bus through the sectional disconnect switch. gas insulated switchgear.