JP2766366B2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a double-bus linear gas-insulated switchgear provided with a bypass circuit.

(Prior Art) In FIG. 2 showing a single-line diagram of a conventional double-bus linear gas-insulated switchgear provided with a bypass circuit, one side is connected to the other side of the line-side bus 11 connected to the cable head 13. Are the line-side disconnector 7, the grounding device 9, and the bypass-side disconnector 10
Are connected to each other.

The other side of the line-side disconnector 7 is connected to one side of the circuit breaker 6 and one side of the grounding device 8, respectively. The other side of the circuit breaker 6 is connected to the main bus-side disconnector 3 and the auxiliary bus-side disconnector. The main bus 4 is connected to one side of the grounding device 5, and the main bus 1 is connected to the other side of the main bus disconnector 3, and the auxiliary bus 2 is connected to the other side of the auxiliary bus disconnector 4.

On the other hand, an auxiliary bus 2 is connected to the other side of the bypass-side disconnector 10, and the main bus 1 and the auxiliary bus 2 are connected to a load (not shown).

By the way, in the gas insulated switchgear connected in this way, the auxiliary bus-side disconnector 4 and the bypass-side disconnector 10 are opened in a normal state, and the line-side disconnector 7, the circuit breaker 6, and the main bus-side disconnector 3 The power supplied from a transformer (not shown) connected to the power supply side of the cable head 13 is supplied from the line-side disconnector 7 and the circuit breaker 6 to the main bus 1 via the main-bus-side disconnector 3. Supplied to Also, if an accident occurs in the circuit breaker 6, the main bus 1 and the auxiliary bus 2 are switchably connected by opening the main bus disconnector 3 and simultaneously turning on the bypass disconnector 10. A power failure (not shown) on the load side is prevented.

Therefore, the bypass-side disconnector 10 that performs the load current input operation at the time of this switching is used under severer conditions than other disconnectors.

Next, FIG. 3 is a configuration diagram showing a device arrangement of the gas insulated switchgear connected in this way.

In the same figure, on the left side of the circuit breaker 6 provided with an outlet at the top and bottom on the left side, a main bus 1 and an auxiliary bus 2 provided with an outlet at the top are respectively provided in a direction orthogonal to the paper of FIG. A main bus-side disconnector 3 having a substantially cross-shaped jacket 3a is connected to an upper outlet of the main bus 1, among which the main bus-side disconnector 3 is connected.
The outlet at the right end of the jacket 3a is connected to the outlet at the bottom of the circuit breaker 6, and a grounding device 5 is connected to the upper part of the jacket 3a.

Further, a line-side disconnector 7 having a bar-shaped outer cover 7a is connected to the upper outlet portion of the circuit breaker 6, and the outer cover 7a of the line-side disconnector 7 is connected thereto.
7a, a grounding device 8 is connected to the right side of the line-side disconnector 7, and a grounding device 9 is connected to the left side.

On the other hand, an auxiliary bus-side disconnector 4 having a substantially cross-shaped jacket 4a is connected to the upper outlet of the auxiliary bus 2, and the right-hand outlet of the auxiliary bus-side disconnector 4 has a cover 3a. It is connected to the left outlet.

Further, the outlet at the upper end of the auxiliary bus-side disconnector 4 is connected to the outlet at the lower end of the bypass-side disconnector 10 of the jacket 10a, which is also substantially cross-shaped, and the outlet at the right end is an outer cover 7a. The right end of the line-side bus 11 whose left end is connected to a cable head (not shown) is connected to the left end of the
Sulfur hexafluoride gas for insulation including the circuit breaker 6 is sealed at a predetermined pressure in the casing of these devices.

(Problems to be solved by the invention) However, in the gas insulated switchgear having such a configuration,
Bypass disconnector used in harsh conditions as described above
When inspecting 10, the circuit breaker 6 must be opened to stop supplying power to the main bus 1, and the long track-side bus 11 must be removed.
If the gas-insulated switchgear is to be installed at other substations or other equipment, and the end of the line-side bus 11 on the cable head side is changed to the right side of the circuit breaker 6, the shape becomes complicated and it is difficult to respond. Difficult

Therefore, an object of the present invention is to provide a gas insulated switchgear which is easy to maintain and inspect and can easily cope with various specifications.

[Configuration of the invention]

(Means and Actions for Solving the Problems) According to the present invention, a breaker, a main bus, and an auxiliary bus are sequentially installed, and a lower part of a main bus-side disconnector having one side connected to a lower pole side of the breaker has a main bus. Double-bus type with bypass circuit connected to the upper part of the main bus-side disconnector, one side of the auxiliary bus-side disconnector connected to the other side of the main bus-side disconnector, and one side of the line-side disconnector connected to the upper pole side of the circuit breaker In the gas insulated switchgear, the lower end is connected to the upper part of the auxiliary bus, the lower branch part is connected to the other side of the auxiliary bus-side disconnector, and the upper part is connected to the other side of the line-side disconnector via a T-shaped branch. By providing a bypass-side disconnector and a substantially J-shaped line-side bus connected to the intermediate portion of the T-shaped branch, the bypass-side disconnector can be freely attached and detached irrespective of other buses and disconnectors, and the line-side bus Flexible draw-out direction for easy maintenance / inspection and easy handling of various specifications It is a gas insulated switchgear that can be used.

Hereinafter, an embodiment of the gas insulated switchgear of the present invention will be described with reference to the drawings. However, the parts overlapping with FIGS. 2 and 3 are omitted.

FIG. 1 is a configuration diagram showing the equipment arrangement of the gas insulated switchgear of the present invention.

In the figure, outer bushes 3a and 7a of the main bus-side disconnector 3 and the track-side disconnector 7 have the same length, and a substantially cross-shaped
An auxiliary bus-bar-side disconnector 4 having a bar-shaped outer cover 4b is connected to the left-side outlet of a, and a T-shaped bus 12 is connected to the left-side outlet of the outer cover 7a of the trackside disconnector 7. The right ends of the same inverted T-shaped outer casing 12a of the outer casing 4b, which is housed and has a left and right length, are connected.

In the upper outlet portion of the auxiliary bus 2, a bypass disconnector 10 is housed, and the upper right outlet portion is connected to the left end of the jacket 12a, and the lower right outlet portion is provided with a jacket portion. The lower end of a substantially F-shaped jacket 10b connected to the left end of 4b is connected, and the lower end of a J-shaped jacket 11b in which a bus bar 11 is housed is provided at an outlet branching from the middle of the jacket 12a. It is connected.

In the gas insulated switchgear configured as described above,
In particular, the bypass-side disconnector 10, which is used under severe conditions, and as a result, wear and roughening of the disconnecting rod and the contact piece that comes into contact with the disconnecting rod needs to be inspected with priority. Therefore, when inspecting the inside by removing the jacket 10b, without removing the long and heavy jacket 11b, and when supplying power from the track side bus 11 to the main bus 1 via the circuit breaker 6 or the like. However, the jacket 10b can be removed alone. If the auxiliary bus-side disconnector 4 is to be checked at the same time,
4b can be removed to the left side at the same time.
A gas-insulated switchgear that is easy to inspect.

Further, even if the specification of the equipment arrangement changes and the jacket 11b is connected from the direction of the circuit breaker 6 in FIG.
The gas-insulated switchgear can easily cope with different specifications because it can be handled by removing the bolt at the lower end outlet and turning the left side to the right side.

Further, among the above-mentioned outer jackets connected at the outlet portion, the cross-shaped outer shell 3a having a complicated shape and requiring a long time to manufacture is a gas-insulated switchgear which is easy to manufacture.

In the above embodiment, the shape of the jacket 11b is J-shaped, but may be L-shaped.

〔The invention's effect〕

As described above, according to the present invention, the circuit breaker, the main bus, and the auxiliary bus are provided in this order, and the lower part of the main bus-side disconnector, one side of which is connected to the lower pole of the circuit breaker, is connected to the upper part of the main bus. In a double-bus type gas insulated switchgear with bypass circuit, one side of the auxiliary bus disconnecting side is connected to the other side of the bus-side disconnector and one side of the line-side disconnector is connected to the upper pole of the circuit breaker. A bypass-side disconnector having a lower end connected to an upper portion of the bus, a lower branch portion connected to the other side of the auxiliary bus-side disconnector, and an upper portion connected to the other side of the line-side disconnector via a T-shaped branch; By providing a J-shaped line-side bus connected to the middle part of the branch,
Make the bypass disconnector detachable regardless of other equipment,
Since the drawing direction of the bus on the track side is freely set, a gas insulated switchgear that can be easily maintained and inspected and can easily correspond to various specifications can be obtained.

[Brief description of the drawings]

1 is a diagram showing an embodiment of a gas insulated switchgear of the present invention, FIG. 2 is a single-line diagram of the gas insulated switchgear to which the present invention is applied, and FIG. 3 is a configuration of a conventional gas insulated switchgear. FIG. DESCRIPTION OF SYMBOLS 1 ... Main bus 2 ... Auxiliary bus 3 ... Main bus side disconnector 4 ... Auxiliary bus side disconnector 6 ... Circuit breaker 7 ... Line side disconnector 10 ... Bypass side disconnector 11 …… track side bus

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H02B 13/00-13/08

Claims (1)

(57) [Claims] A circuit breaker, a main bus, and an auxiliary bus are provided in this order, and a lower part of a main bus side disconnector, one side of which is connected to a lower pole side of the circuit breaker, is connected to an upper part of the main bus. One side of the auxiliary bus-side disconnector is connected to the other side of the bus-side disconnector,
In a double-bus linear gas-insulated switchgear with a bypass circuit in which one side of a line-side disconnector is connected to the upper pole side of the circuit breaker, a lower branch portion having a lower end connected to an upper portion of the auxiliary bus is formed by the auxiliary bus. A bypass disconnector connected to the other side of the side disconnector and an upper part connected to the other side of the line side disconnector via a T-shaped branch, and a J connected to an intermediate portion of the T-shaped branch;
A gas-insulated switchgear, characterized in that a line-shaped bus bar is provided.