JPH08205341A - Gas insulated switchgear - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a gas-insulated switchgear capable of reducing the installation area of the entire apparatus and easily adapting to changes in layout. [Structure] On the rear side of the operation panel 30, a power receiving unit 1 is located on both outer sides, a PCT unit 2 and a transformer primary unit 3 are located on the inner side, and a CB accommodating portion of units 1 and 3 is located on the operation panel side. The units 1 to 3 are arranged in this manner. There are two upper and lower connecting parts, 6 in the upper and 4 in the lower.
Arrange the disconnector housings to connect with the unit. Each storage unit is connected to each storage unit by a connecting conduit or the like. A busbar disconnector, a switching disconnector, a connection disconnector and a ground switch are housed in each disconnector housing and the PCT unit. This allows
Configure a power receiving system with a PCT switching circuit for normal-spare two-line power receiving system. The operation device is arranged on the operation panel 30 side. The units 2 and 3 can be rearranged in the space between the outermost power receiving units.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear used in power receiving and transforming equipment, and more particularly to improvement of the layout of the equipment.

[0002]

2. Description of the Related Art FIG. 8 is a single line connection diagram showing an example of connection of a gas-insulated switchgear when a normal-spare two-line power receiving system is adopted. In this example, two transformer current transformers (PCs)
T) and a transformer primary circuit breaker, and a PCT switching circuit. 9 and 10 show conventional examples of equipment layouts by this connection. FIG. 9 is a plan view and FIG. 10 is a side view, showing the connection state together.

In the figure, 1 is a power receiving unit, 2 is a PCT unit, 3 is a transformer primary unit, 4 is a PCT switching unit, 5 is a PCT, and 6 is a transformer. Power receiving unit 1
Is a retracting portion 1A accommodating a disconnector 7, a lightning arrester 8, a grounding switch 9, a cable head 10, and the like, and a circuit breaker (C
B) CB storage unit 1 storing 11 and grounding switch 12
The tank is divided into B and. The retracting portion 1A and the CB storing portion 1B are directly connected. The switching unit 4 includes the conduit 1
3A and 13B and two PCT units 2 are formed in the corners of a quadrangle, and disconnector housings 14A, 14B, 14C and 14
D is provided, and the receiving side storage units 14A, 1
4C is the power receiving unit 1 and the storage section 14B, 1 on the transformer side.
4D are each coupled to a transformer primary unit 3. A transformer 6 is connected to the transformer primary unit 3 via a pipe 15. Further, the disconnector storage portion 14A (14
B, 14C, 14D) has a busbar disconnector 16A (16B,
16C, 16D) and the PCT switching disconnector 17A (17
B, 17C, 17D) and ground switch 18A (18B, 1
8C, 18D) are stored. Pipeline 13A (13
The disconnector housing 26A (26B) is inserted in B), and the disconnector 19-1A, 19-2A (19-1B,
19-2B) and the earthing switch 27A (27B) are stored. The transformer primary unit 3 includes a transformer primary circuit breaker 2
0, a ground switch 21, and the like. And the operating device 2 for operating the circuit breaker, the disconnecting switch, and the earthing switch.
2 to 24 are installed next to the device. In addition, 25 is a cable for pulling in.

[0004]

Even in this type of gas-insulated switchgear, the operating devices 22 to 24 are used for periodic inspections.
Since the door will be opened and closed, it is necessary to secure a space for opening and closing the door. Therefore, it is difficult to reduce the size because the array size of each of the regular and spare devices is restricted, and the installation area of the gas insulated switchgear is increased. Also, depending on the situation of the installation location, it may be requested to change the equipment layout, for example, the installation point of the PCT unit 2 or the transformer primary unit 3, but the above configuration is fixed,
Change is difficult.

Therefore, an object of the present invention is to solve the above problems, to provide a gas-insulated switchgear capable of reducing the installation area of the entire apparatus and easily responding to changes in equipment layout.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a power receiving unit for two lines having a retracting part and a CB accommodating part in which a required switching device is accommodated in each tank, two PCT units, and a transformer. In a gas-insulated switchgear comprising a transformer primary unit having a primary circuit breaker and a PCT switching circuit having a communication disconnector and a switching disconnector, on the back side of the operation panel, power receiving units on both outsides, The PCT unit and the transformer primary unit are located between the power receiving units, and each unit is arranged so that the CB storage section is located on the operation panel side.
For the T unit, the upper and lower two stages, for the power receiving unit only the upper stage,
In the transformer primary unit, only the connecting parts of the lower stage are provided, the disconnecting device storage parts are connected to each connecting part, and one or two disconnecting device storage parts are assigned to the upper stage side, and each disconnecting device storage part and the PC are connected.
A busbar disconnector, a connection disconnector, a PCT switching disconnector, and a grounding switch are stored in the T unit in predetermined combinations, and are connected to each other by connecting the disconnector housings to each other and interposing a connecting busbar line. And a predetermined circuit configuration, the operating devices are collectively arranged on the operation panel side.

[0007]

By arranging each operation device on the operation panel side, it is not necessary to consider the door opening / closing space when setting the device arrangement dimension, and the installation space of the entire device can be reduced by shortening the device interval. Further, in the installation space between the outermost power receiving units, the position of the PCT unit and the transformer primary unit can be easily exchanged, and the device layout becomes flexible.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

(A) Embodiment 1 Embodiment 1 of the gas-insulated switchgear according to the present invention is shown in FIGS.
Shown in 1 is a plan view, FIG. 2 is a view taken along the line AA of FIG. 1, FIG. 3 is a view taken along the line BB of FIG. 1, and FIG. 4 is a view taken along the line CC of FIG.
FIG. 5 is a schematic layout connection diagram, and each arrow view also shows the connection state. The connection is the same as described above, and is shown as a single-line connection diagram in FIG.

As shown in the figure, two sets of power receiving unit 1, PCT unit 2 and transformer primary unit 3 (distinguished by 1L and 2L) are provided on the rear side of the operation panel 30, and the power receiving unit 1 is provided at the outermost side.
(1L), 1 (2L), PCT unit 2 inside
(1L), 2 (2L), transformer primary unit 3 in the center
(1L) and 3 (2L) are arranged side by side. In this case, in the power receiving unit 1 and the transformer primary unit 3, the CB accommodating portions 1B and 3A are located on the operation panel 30 side. The two CB accommodating portions 1B and 3A have the same combination of the switching devices to be accommodated, and differ only in the height of the coupling portion used for coupling with other units. That is,
The power receiving unit 1 is provided with a coupling portion in an upper stage in the CB storage portion 1B and in the CB storage portion 3A of the transformer primary unit 3 in a lower stage. Further, since the overhead wire connection system is used in this embodiment, the bushing 28 is provided in the lead-in portion 1A of the power receiving unit 1.
Are installed in series.

C of the power receiving unit 1 (1L), 1 (2L)
The B storage unit 1B is connected to the disconnector storage units 31A and 31B, and the upper and lower connection parts of the PCT units 2 (1L) and 2 (2L) are connected to the disconnector storage units 32A, 32B, 33A and 33B, respectively. ing. Upper storage parts 31A, 32
A, 33A and 31A are connected by a connecting bus line 34 and disconnector storages 35A and 35B, and the lower storage 32 is connected.
Between B and 33B, connecting bus line 36, disconnector housing 3
It is connected by 7A and 37B. A PCT 5 is attached to the PCT unit 2 as shown in FIG. The disconnector housing 37A is the CB of the transformer primary unit 3 (1L).
The storage 3A and the disconnector storage 37B are respectively coupled to the CB storage 3A of the transformer primary unit 3 (2L) (see FIG. 4). PCT unit 2 (1L) (2 (2
L)) is a ground switch 18A, 18B (18C, 18
Equipped with D). A power receiving side busbar disconnector 16A (16C) is provided in the storage portion 31A (31B) and a storage portion 32A (32C).
The PCT switching disconnector 17A (17C) is shown in B), and the PCT switching disconnector 17B (1) is provided in the storage section 33A (33B).
7D) to the storage section 35A (35B)
-1A and the earthing switch 27A (only the connection disconnector 19-2A), and the storage portion 37A (37B) in the transformer side busbar disconnector 16B, the connection disconnector 19-1B and the earthing switch 27.
B (Transformer side busbar disconnector 16D and connecting disconnector 19-2
B) is stored.

A disconnector 7, a lightning arrester 8, and a ground switch 9 are housed in the tank of the lead-in portion 1A of the power receiving unit 1. A circuit breaker 11 and a ground switch 12 are housed in the tank of the CB housing portion 1B. Transformer primary unit 3
Has a structure in which the CB accommodating portion 3A and the cable connecting portion 3B are directly connected, and the cable connecting portion 3B is connected to the transformer via the cable 38. A transformer primary circuit breaker 20 and two ground switches 21 are housed in the cable connecting portion 3B.

The main circuit is composed of the bushing 28 to the lead-in portion 1.
Disconnector 7 of A to power receiving breaker 11 of CB accommodating section 1B to disconnector 16A in disconnector accommodating section 31A (or disconnector 16C in disconnector accommodating section 31B to disconnecting disconnector 19-2A to disconnecting disconnector 19) -1A) to switching disconnector 17 for storage 32A
A-PCT unit 2-PCT5-PCT unit 2-
It becomes the path of the switching disconnecting switch 17B of the storage section 33A, and from here, the busbar disconnecting switch 16B to the transformer primary unit 3 (1L) in the disconnecting switch storage section 37A and the communication disconnecting switch 19-1B to.
It is divided into the connection disconnector 19-2B to the bus disconnector 16D to the transformer primary unit 3 (2L), and reaches the transformer 6 (No. 1, No. 2) via the cable 38.

On the other hand, the operation device is arranged on the operation panel 30 side, such as being housed in the operation panel 30 as a whole, and is connected to the circuit breaker body via a link mechanism or the like. As for the arrangement of the CB operating device on the operation panel 30 side, the CB storing section 1B is arranged in the retracting section 1.
Since it is located closer to the operation panel 30 than A, it is possible even in the case of a cable connection method. In other words, this arrangement is possible by moving the rising portion of the cable 25, which has become an obstacle, rearward.

With such a configuration, since each operating device is arranged on the side of the operation panel 30, it is not necessary to consider the door opening / closing space when setting the device interval dimension, and the device interval is reduced accordingly, and the device is reduced. The overall footprint is reduced. Moreover, the disconnector housings 31, 32, 33, 35,
By-pass circuits are formed in upper and lower stages by 37 and the connecting conduits 34, 36, etc., and the installation space is also reduced in plan view. Further, by disposing each operation device, particularly the CB operation device, on the operation panel 30 side, the operability thereof is significantly improved and the maintenance is facilitated.

The PCT 5 is switched from the regular use to the spare side as required. This operation is performed by the switching disconnector 17A.
-17D, connection disconnector 19-1A, 19-2A, 19-
1B, 19-2B and grounding switches 18A-18D, 27
It will be performed by A and 27B.

(B) Embodiment 2 Embodiment 2 is shown in FIGS. 6 and 7. FIG. 6 is a plan view, and FIG. 7 is a schematic layout connection diagram. In the second embodiment, the two PCT units 2 are arranged in the center, the transformer primary units 3 are arranged on both sides of the PCT unit 2, and the power receiving unit 1 is arranged outside the transformer primary units 3. Since the two PCT units 2 are arranged at the center and the distance between them is smaller than that of the first embodiment, one disconnector housing 35 is provided between the disconnector housings 32A and 32B, and inside this, the disconnector housing 35 is provided. It stores the connection disconnectors 19-1A and 19-2A and the ground switch 27A. Also in this case, the power receiving unit 1 is arranged on the outermost side, which is advantageous in securing the air insulation distance of the bushing 28 when the overhead wire connection system is adopted. Further, even with such an arrangement relationship, as in the first embodiment, the CB accommodating portion 1B of the power receiving unit 1 is still located closer to the operation panel 30 side than the pull-in portion 1A, and in the case of the cable connection method. Also, the CB operation device can be arranged on the operation panel 30 side.

[0018]

As described above, according to the present invention, since the operating device is moved from the vicinity of the device to the operation panel side to reduce the device interval, the installation area of the entire device can be reduced. In addition, the power receiving unit is arranged outside the transformer primary unit and the PCT unit, and these are connected by the upper and lower two-stage bus line, disconnector housing, etc., so that the installation area can be further reduced and the arrangement can be replaced. It is possible to expect a layout that suits the situation of the installation location. In particular,
In the case of the overhead wire connection method, the air insulation distance between the bushings can be secured, which is advantageous. Further, since the operation devices are collectively installed on the operation panel side, there are advantages that maintenance is easy and operability can be improved.

[Brief description of drawings]

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

FIG. 2 is an AA arrow view of FIG. 1 showing the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 3 is a BB arrow view of FIG. 1 showing the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 4 is a sectional view taken along the line CC of FIG. 1 showing the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 5 is a schematic layout diagram showing a first embodiment of the gas insulated switchgear according to the present invention.

FIG. 6 is a plan view showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 7 is a schematic layout diagram showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 8: Embodiments 1 and 2 of the gas insulated switchgear according to the present invention
Single line connection diagram.

FIG. 9 is a plan view showing a conventional example of a gas insulated switchgear.

FIG. 10 is a side view showing a conventional example of a gas insulated switchgear.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Power receiving unit 1A ... Retracting part 1B ... CB storing part 2 ... PCT unit 3 ... Transformer primary unit 3A ... CB storing part 5 ... PCT 6 ... Transformer 16A-16D ... Busbar disconnector 17A-17D ... PCT switching disconnection vessel. 18A-18D, 27A, 27B ... Grounding switch 19-1A-19-2B ... Communication disconnecting switch. 28 ... Bushing 30 ... Operation panel 31A-33B, 35, 35A, 35B, 37A, 37
B: disconnector storage

Claims (2)

[Claims] 1. A transformer provided with a power receiving unit for two lines having a lead-in part and a CB accommodating part for accommodating required switching devices in each tank, two PCT units, and a transformer primary circuit breaker. In a gas-insulated switchgear comprising a primary unit and a PCT switching circuit having a connection disconnector and a switching disconnector, a power receiving unit on both sides on the back side of the operation panel, a PCT unit and a transformer between both power receiving units. Each unit is arranged so that the container primary unit is located and these CB accommodating parts are located on the operation panel side.
The upper and lower stages of the power receiving unit and the lower stage of the transformer primary unit are provided with connecting portions, and each connecting portion is connected to the disconnector housing portion, and one or two disconnector housing portions are allocated to the upper stage side, A busbar disconnector, a connection disconnector, a PCT switching disconnector, and a grounding switch are housed in each disconnector housing and the PCT unit in a predetermined combination, and the disconnector housings are connected to each other at each stage and the connecting busbar is connected. A gas-insulated switchgear characterized in that each operating device is collectively arranged on the operation panel side while being connected by a path to form a predetermined circuit configuration. 2. The gas-insulated switchgear according to claim 1, wherein a bushing for connecting the overhead line is connected to a lead-in portion of the power receiving unit.