JPH08256409A - Gas-insulated switch - Google Patents

Abstract

PURPOSE: To provide a gas-insulated switch which can maintain high quality, shorten installation time and reduce costs in spite it is a pull-in and pull-out type. CONSTITUTION: A round tank 2 in which a breaker of three-phase is collectively received and at the same time a disconnector with a grounding switch is received by utilizing the empty space of triangular disposition is horizontally installed on a frame in a detachable fitting state. An operating box 4 for common use in which each operating mechanism is received is disposed in the end surface of the tank 2. Branch pipes 2A, 2B are integratedly provided in the front and rear of the peripheral surface of the round type tank 2 and a pull-in and a pull-out units, for instance, a tank 5A or an article in which a pull-in and a pull-out bushings 8A, 8B are fitted to a bushing fitting part of a bushing support pipe 5B are connected. Branch pipe 2C is integratedly provided by the side of the branch pipe 2A in the peripheral surface of the tank, and a drive shaft 35 is disposed between its interior and the interior of the operating box 4. Therefore, size reduction can be achieved and transportation can be performed in the state that the pull-in and the pull-out units are fitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-phase all-in-one type composite gas insulated switchgear in which a disconnector, a grounding switch, a lightning arrester, etc. are incorporated in a circuit breaker.

[0002]

2. Description of the Related Art In the case of constructing a three-phase collective type composite gas insulated switchgear by incorporating a disconnecting switch and a ground switch in a circuit breaker, a unit configuration as shown in FIG. 14 is considered. In other words, the round tank 5 that contains the circuit breakers in three phases at once
1 is placed horizontally on the mount 52, and the mounting legs 53 and the mount 52 are mounted.
The operation box 5 that holds the operation mechanism while fixing the
4 is arranged on the end surface of the tank 51. In addition, branch pipes 51A, 51 provided integrally before and after the outer peripheral surface of the round tank 51.
One of B, for example, branch pipes 55A,
The auxiliary tank 55 having 55B is connected, and the bushing support pipes 56A and 56B are attached to the branch pipe 55A of the auxiliary tank 55 and the branch pipe 51B of the round tank 51, respectively.
Bushings 57A and 57B for pulling out and attaching to the bushing attachment portions 56An and 56Bn are attached. In the auxiliary tank 55, a disconnector 70 for the three phases and a grounding switch 80 are housed, and an operation box 58 thereof is arranged below the auxiliary tank 55.

[0003]

However, in such a unit structure, the external dimensions of the device become large, which causes a problem during transportation. A trailer is used to transport this type of gas insulated switchgear, but the transport dimensions are limited (height 3100
mm, width 3000 mm or less), and in the case of the illustrated example, the width dimension exceeds the limit dimension. For this reason, it is necessary to remove the pull-in unit (draw-in bushing 57A) or the pull-out unit (draw-out bushing 57B) for transportation.

In this way, if a part of the unit is removed so that the size becomes equal to or smaller than the limit size during transportation, and then assembled at the time of installation after transportation, a lot of work time and an assembly machine are required for disassembling and assembling work. It will be up. Also, maintaining high quality becomes difficult.

In the gas-insulated switchgear, depending on the customer's specifications, the pull-in / pull-out type is cable pull-in (pull-out) or bushing pull-in (pull-out), but the above-mentioned problems occur in any type of unit. .

It is therefore an object of the present invention to solve the above problems and to provide a gas-insulated switchgear capable of maintaining high quality, shortening the installation period and reducing the cost regardless of the pull-in / pull-out type.

[0007]

SUMMARY OF THE INVENTION According to the present invention, three-phase batch type circuit breakers are housed in a triangular arrangement, and a disconnector is located in the empty space and a ground switch is located on an extension of the disconnector. In addition to accommodating the disconnecting switch with grounding switch, the branch pipes for attaching and withdrawing units located at the front and rear of the outer peripheral surface and the branch pipes for the operating mechanism that are lined up with the front branch pipe are integrally provided on the stand. A round tank that is horizontally installed in a removable state, and an operating mechanism for a circuit breaker that is placed on the end surface of this round tank and is connected to the inside of the branch pipe for the operating mechanism by a drive shaft that is parallel to the central axis of the tank. And a common operation box for a disconnecting switch operating mechanism with a grounding switch, select a cable or bushing pull-in or pull-out unit for the unit mounting branch pipe of the round tank according to the customer's specified pull-in or pull-out type. Tied Characterized by being adapted to.

[0008]

[Function] The round tank is installed horizontally on the frame,
The disconnector and the earthing switch are housed together in a three-phase package in the tank by utilizing the open space of the triangular arrangement of the three-phase batch circuit breaker. The front and rear branch pipes on the outer peripheral surface of the tank are connected with a pull-in / pull-out unit of a type according to customer specifications. Even in this combined state, the width dimension during transportation is below the limit value. Further, the operation box on the end face of the tank is shared by the operation mechanism of the circuit breaker and the operation mechanism of the disconnector with a ground switch. As a result, the overall size is reduced. Since the pedestal is removed during transportation, the height is also less than the limit dimensions for transportation.
It can be transported with the required pull-in and pull-out units attached, that is, with high quality maintained, and installation can be completed in a short period of time.

[0009]

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

Embodiment 1 of the gas insulated switchgear according to the present invention
Are shown in FIGS. 1 is a plan view of the whole, FIG. 2 is a side view of the whole, FIG. 3 is a front view of the whole, FIG. 4 is a vertical cross-sectional view of the main part, FIG. 5 is a cross-sectional view of the main part, and FIG. Is.
Example 1 is a case where a bushing (BU) is used for drawing in and drawing out. In the figure, 1 is a gantry, and 2 is a round tank horizontally installed on the gantry 1. In the round tank 2, three phases of a circuit breaker (for example, a gas circuit breaker; GCB) 20 are collectively stored in a triangular arrangement, and the empty space (a space on the long side of the triangular arrangement) is used. Then, the disconnecting switch (DS) 30 and the earthing switch (E
S) 40 is stored. A mounting leg 3 is integrally attached to the lower half of the outer peripheral surface of the round tank 2, and the mounting leg 3 and the gantry 1 are fixed by bolts. This is because consideration was given to removal during transportation. In addition, branch pipes 2A and 2B for unit mounting are integrally provided in front and rear of the outer peripheral surface of the round tank 2, and further, a branch pipe 2A and a branch pipe 2C for an operation mechanism that are aligned in the tank axial direction are integrally provided. There is. Reference numeral 4 denotes an operation box arranged on the end surface of the round tank 2, which accommodates an operation mechanism 61 of the circuit breaker 20 and an operation mechanism 62 of the disconnector 30 and the grounding switch 40 (disconnector with grounding switch). .

Reference numeral 5A is a tank (cylindrical) of the drawing unit, and 5B is a bushing support tube of the drawing unit. The tank 5A has one branch pipe 5 at the center of its outer peripheral surface.
A ₀ is integrally provided, and is vertically attached to the unit mounting branch pipe 2A of the round tank 2. An insulating spacer 6A for gas division is interposed on this mounting surface. The tank 5A has a bushing attachment portion 15 on its upper end surface.
A _2, having a branch pipe 16A _1, 16A ₃ at the top left and right, a structure further having a branch pipe 16A _1, 16A perpendicular bushing mounting portion 15A directly above portion of the end portion peripheral surface ₁ of _3, 15A ₃ There is. On the other hand, the bushing support pipe 5B has a bushing attachment portion 15B ₂ just above the peripheral surface thereof and the branch pipes 1 on the left and right.
6B ₁ and 16B ₃ , respectively, and branch pipes 16B ₁ and 1
6B ₃ has a structure having vertical bushing attachment portions 15B ₁ and 15B ₃ just above the peripheral surface of the end portion, and the end surface is attached to the branch pipe 2B of the round tank 2. An insulating spacer 6B is interposed on this mounting surface. Pull-in and pull-out bushings 8A and 8B are attached to the bushing attachment portions 15An and 15Bn (collective display for three phases).
In this case, each bushing 8A, 8B is in a mounting state in which the vertical plane including the center axis of the three-phase bushing is parallel to the vertical plane including the center axis of the round tank 2, and all three phases are in the vertical arrangement. Further, the tank 5A of the retracting unit has branch pipes 17A ₁ and 17A ₂ on the lower left and right sides thereof, and an instrument transformer (1φPT) 9 is attached to one of the branch pipes 17A ₂ . A lightning arrester (LA) is incorporated in the tank 5A of the retracting unit. In addition, a bushing current transformer (BCT) is arranged at each bushing attachment portion.

The disconnector 30 has a fixed side contact 31.
Is integrally formed with a charging part at one end of the circuit breaker 20, and a rod-shaped movable side contact 32 which comes in contact with and separates from the supporting part 33
It is slidably supported by and has a structure in which a ring contact (not shown) for current collection is interposed therebetween. The support conductor 33 is firmly fixed to the insulating spacer 6A using the conductor 7 for the main circuit. That is, the conductor 7 is
This means that it also has the function of both energization and support. In order to move the movable side contact 32, a drive shaft 35, a part of which is a screw shaft portion, is rotatably arranged between the inside of the branch pipe 2C for the operation mechanism and the inside of the operation box 4, and the screw The shaft portion and the screw hole of the support fitting 36 are screwed together, and the support fitting 36 and the movable contact 32 are connected by an insulating rod 37. Support bracket 3
6 is engaged with the guide rod 38 in order to maintain its posture. The drive shaft 35 is engaged with the operation mechanism 62 of the disconnecting switch with a ground switch in the operation box 4, and when the rotary drive thereof is performed, the support fitting 36 is brought into contact with the fixed side contact 31 or in a direction to be separated. By moving it, the disconnecting switch 30 and the grounding switch 40 are opened and closed. The grounding switch 40 is arranged on an extension line of the movable contact 32 of the disconnector 30 having a linear cut structure arranged in a triangle, and the end of the disconnector 30 opposite to the movable contact 32 is used as a movable contact. ing. Then, the fixed contact 41 that comes into contact with and separates from the fixed contact is attached to the fixed plate 42. The ground switch 40 operates in conjunction with the disconnector 30. Both constitute a so-called disconnect switch with a grounding switch.

With such a structure, the three-phase batch type circuit breaker 20, the three-phase batch type disconnector 30 and the ground switch 40 effectively utilize the internal space inside the round tank 2 on the gantry 1. Since it is stored, the width during transportation is less than the limit size even with the retracting / drawing unit attached.
Also, a common operation box 4 is arranged on the end surface of the tank 2,
Overall reduced. Moreover, the tank 2 for storing the circuit breaker
Bushing attachment portions 15An, 15Bn of the tank 5A of the retracting unit attached to the branch pipes 2A, 2B located before and after the outer peripheral surface of the
The height of the upper end surface of is equal to or greater than the desired value (2500 mm). Since the gantry 1 is removed during transportation, the height is below the limit dimension during transportation, and the bushings 8 for pulling in and out
It can be transported with A and 8B attached, that is, with high quality maintained. For on-site assembly, the gantry 1 is installed, the round tank 2 (transported with the retracting and withdrawing bushings 8A, 8B attached) is placed on the gantry 1, and it is fixed by bolts. Ends in a short time.

Embodiment 2 is shown in FIGS. 7 and 8. Example 2
Shows the case where the bushing is pulled in and the cable is pulled out. In the second embodiment, the cable head is housed in the tank 11 of the drawer unit, and the branch pipe 11B provided on the peripheral surface is connected to the branch pipe 2B of the round tank 2. Circuit breaker 20,
The switchgear unit including the disconnector 30, the ground switch 40, etc., and the retracting unit including the retractable bushing 8A are the same as those in the first embodiment.

Embodiment 3 is shown in FIGS. 9 to 11. Example 3
Shows the case where the cable is pulled in and the bushing is pulled out. In Example 3, the branch pipe 12A of the tank 12 of the drawing unit for accommodating the cable head, the branch pipe 12A ₁ binds branch pipe 2A round tank 2 for breaker housing, binds arrester housing tank 13 _2, provided branch pipes 12A ₃ for coupling the instrument transformer 9 together, are coupled with each. The drawer unit including the switchgear unit and the bushing is the same as that in the first embodiment.

Example 4 is shown in FIGS. 12 and 13. Example 4 is a case where the cable is pulled in and the cable is pulled out. In the fourth embodiment, the cable pull-in unit of the third embodiment (the tank 12 for storing the cable head, the lightning arrester storage tank 13, the transformer 9 for the instrument, etc.) is used as the pull-in unit, and the cable of the second embodiment is used as the pull-out unit. Draw-out units (such as the tank 11 that houses the cable head) are used.

In any of Examples 2 to 4, the width during transportation is less than or equal to the limit size, and in the examples using the bushing, the height is also less than or equal to the limit size by removing the mount 1. . Therefore, in either case, it can be transported with the pull-in / pull-out unit attached, that is, in a state where high quality can be maintained, the installation is easy, and the process is completed in a short period of time.

In each of the above embodiments, the arrester,
Equipped with a transformer for measuring instruments, but it has a structure that can be removed when it is not needed, so it can be easily handled.

[0019]

As described above, according to the present invention, the round tank for accommodating each switchgear is mounted so that the disconnector with a ground switch is located in the empty space of the triangular arrangement of the three-phase batch type circuit breaker. Installed horizontally in a detachable state on the top, attached a common operation box to its end face, and select a pull-in or pull-out type unit according to customer specifications in branch pipes integrally provided on the front and rear of the tank outer peripheral surface It is possible to reduce the size as a whole and to easily and accurately meet customer specifications. Moreover, if the frame is removed, the transportation dimension will be less than the limit value, so that it becomes possible to transport with the retracting / drawing unit having the retracting and retracting bushings attached, and high quality can be reliably maintained. Further, since the on-site assembly is only the work of installing the round table, installing the pull-in unit, and installing the round tank on which the pull-out unit is integrated, it is possible to shorten the installation period and reduce the cost. Furthermore, the operating mechanism of the circuit breaker and the operating mechanism of the disconnecting switch with the earthing switch are stored in the same operation box, which allows for compactness, labor saving due to maintenance and inspection on the same monitoring surface, and cost reduction due to material saving. Can be expected.

[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 a side view showing a first embodiment of the gas insulated switchgear according to the present invention.

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

FIG. 4 is a vertical cross-sectional view of the essential parts showing the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 5 is a transverse cross-sectional view of a main part showing a first embodiment of the gas insulated switchgear according to the present invention.

FIG. 6 is a single line connection diagram of the first embodiment.

FIG. 7 is a side view showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 8 is a front view showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 9 is a plan view showing a third embodiment of the gas insulated switchgear according to the present invention.

FIG. 10 is a side view showing a third embodiment of the gas insulated switchgear according to the present invention.

FIG. 11 is a front view showing a third embodiment of the gas insulated switchgear according to the present invention.

FIG. 12 is a side view showing a fourth embodiment of the gas insulated switchgear according to the present invention.

FIG. 13 is a front view showing a fourth embodiment of the gas insulated switchgear according to the present invention.

FIG. 14 is a side view showing a conventional example of a gas insulated switchgear.

[Explanation of symbols]

 1 ... Stand 2 ... Round tank 2A, 2B, 2C ... Branch pipe 4 ... Operation box 5A ... Tank of retracting unit 5B ... Bushing support pipe of drawer unit 6A, 6B ... Insulating spacer 7 ... Conductor 8A ... Bushing 8B ... Bushing for drawer 9 ... Transformer for instrument 11 ... Tank for cable head (drawer unit) 12 ... Tank for cable head (draw-in unit) 13 ... Tank for storing arrester 20 ... Circuit breaker 30 ... Disconnector 31 ... Fixed side contact 32 ... Movable side contact 35 ... Drive shaft 36 ... Supporting metal fitting 37 ... Insulating rod 38 ... Guide rod 40 ... Grounding switch 41 ... Fixed contact 61 ... Breaker breaker operating mechanism 62 ... Grounding switch operating mechanism

Claims (1)

[Claims] 1. A three-phase batch type circuit breaker is housed in a triangular arrangement, a disconnector is provided in the empty space, and a disconnector with a grounding switch is provided so that the grounding switch is located on an extension of the disconnector. In addition to storing, the branch pipes for attaching and withdrawing units located at the front and rear of the outer peripheral surface and the branch pipes for the operating mechanism that are lined up with the front branch pipes are integrally provided, and are horizontally mounted in a removable state on the pedestal. The installed round tank,
It is located on the end face of this round tank and is connected to the inside of the branch pipe for the operating mechanism by a drive shaft parallel to the center axis of the tank, and a common operating box for the operating mechanism for the circuit breaker and the operating mechanism for the disconnector with a ground switch. Equipped with the unit mounting branch pipe of the round tank,
A gas-insulated switchgear characterized in that a cable or bushing pull-in and pull-out unit are selected and connected according to the pull-in or pull-out type specified by the customer.