JP2548925Y2 - Gas insulated switchboard - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchboard in which an insulating gas is sealed in a box.

[0002]

BACKGROUND OF THE INVENTION In FIG. 6 shows an example of a conventional gas-insulated closed switchboard, the front face of the box body 1 as the incoming panel, before Mentobira 12A is on the back of the box 1, the rear door 12B, respectively Installed. Inside the box 1, a partition 13A is provided at the front, and a partition 13B and a partition 13C are provided at the rear.
Are provided vertically, and the partition 13A and the front door 12 are provided.
Forming a low-pressure chamber 14 between the A. Partition 1 of these
Between the 3A and the partition 13B, there is an upper partition 25A
However, a lower partition 25B is provided below, a disconnector chamber 15 is formed above the partition 25A, a breaker chamber 16 is formed between the partition 25A and the partition 25B, and a transformer chamber 18 is formed below the partition 25B. doing. A cable partition 25C is provided at a lower portion between the partition 13B and the partition 13C, and a current transformer room 17A is formed at an upper portion of the cable partition 25C, and a cable room 17B is formed at a lower portion thereof.

A control circuit chamber (not shown) is attached to the upper front of the low-pressure chamber 14, and a disconnector operating mechanism 31B is provided at the upper front of the partition 13A, and a circuit breaker operating section 32 is provided at the middle front of the partition 13A. Disconnector operating mechanism 31A is attached to each. A flange 11B is fixed to the ceiling plate above the disconnector chamber 15 by welding, and a T-shaped bushing 21 described in JP-A-60-160309 is staggered on the flange 11B in a plan view (not shown). A high-pressure cross-linked polyethylene cable 22 pierced in an airtight manner and connected to the bushing 21 is adjacent to the box 1.
Is connected to the set has been unillustrated power supply board of the box body upper bushing (not shown). In the disconnector room 15, there is a partition 1
A disconnector 24 is attached to the rear surface of the disconnector 3A.
The upper pole of 4 is connected to the lower end of bushing 21 by conductor 23, respectively, and the lower pole of disconnector 24 is connected to the upper terminal of spacer 26A penetrating partition 25A.

[0004] In the circuit breaker chamber 16, a vacuum circuit breaker 28 is mounted on the rear surface of the flange 11A welded to the front surface of the partition 13A, and the upper pole of the vacuum circuit breaker 28 is connected to a conductor 27A.
Is connected to the lower terminal of the spacer 26A by the vacuum circuit breaker 2
The lower pole of 8 is connected to a terminal on the front side of a spacer 26B penetrating through the center of the partition 13B by a conductor 27B.
The lower end of the middle portion of the conductor 27B is connected to the upper end of a conductor 27C which is fixed to the insulator 28 on the front surface of the partition 13B and is disposed vertically at the rear of the breaker chamber 16. At the rear of the partition 25B, the zero-phase transformer 2 is attached with its primary side facing upward. An L-shaped conductor 30 is fixed to the upper end of the zero-phase transformer 2, and a conductor 27 is attached to the upper end of the conductor 30.
The lower end of C is connected.

A current transformer 33 is attached to the front of the partition 13C in the current transformer room 17A, and an upper terminal of the current transformer 33 is connected to a rear terminal of the spacer 26B by a conductor 27D. The partition 25C, cable head 34 forwardly, formed through the voltage application bushing 35 rearwardly longitudinally respectively, the cable head 34 and the voltage application bushing
The upper end 35 is connected to the lower terminal of the current transformer 33 by a conductor 27E, the cable head 34, the high-pressure cross-linked polyethylene cable 3 that is raised from the floor on which the box 1 is installed
6A is connected. Disconnector room 15, breaker room 16,
The current transformer chambers 17A, sulfur hexafluoride gas is sealed <br/> penetration by substantially atmospheric pressure.

In the gas-insulated closed switchboard constructed as described above, the disconnector 24, the vacuum circuit breaker 28 and the conductors 23, 27A, withstand voltage test between the main circuit unit and the box 1 of the ground potential portion, such as 27B is Ru performed. At that time, the disconnector 24 is operated by the disconnector operating mechanisms 31A and 31B.
And a test cable 36B is connected to a power application bushing 35 penetrating the rear of the partition 25C. The zero-phase transformer 2 is connected to a high voltage applied in the withstand voltage test. voltage, in order to protect from a temperature rise due to the saturation of the iron core, is <br/> disconnected at the conductor.

[0007]

However, in the gas-insulated closed switchboard configured as described above, the conductor 27C
Must be removed from the conductor 30 by removing a flange (not shown) provided below the vacuum circuit breaker 28 of the partition 13A, so that the sulfur hexafluoride gas sealed in the circuit breaker chamber 16 is recycled. Must be enclosed.
Then, since gas replacement must be performed every time a withstand voltage test is performed, it takes time for the withstand voltage test, and it may not be possible with a limited number of maintenance and inspection days. Therefore, the purpose of the present invention is to reduce the working time of the withstand voltage test,
An object of the present invention is to provide a gas-insulated switchboard which can be easily maintained and inspected.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an insulating device.
One side of the main engine room where gas is sealed and the high-pressure main engine is stored
The auxiliary equipment room is located next to the wall through the wall, and is located on the main engine room side of the bulkhead.
Auxiliary equipment connected to the high-voltage main engine via the
One side of a gas-insulated closed switchboard housed in a room
Connected to the main engine and provided in the main engine room and the other side
Airtight between the contact piece that makes contact with the elastic force and the partition on the other side of the main engine room
The contact piece is connected and guided by one operation in the axial direction.
Separated from the body, the lock piece is locked to the connecting conductor by rotating operation.
Operation to press the lock piece against the connection conductor with the elastic return force of the contact piece
In Rukoto a bar, when the withstand voltage test, by operating the operating rod in the axial direction, disconnector Type-off the, by disconnecting the connection to the main circuit of the main circuit accessory, airtight chamber Release of insulating gas
This is a gas-insulated closed switchboard that does not require replacement and facilitates maintenance and inspection.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas insulated closed switchboard of the present invention will be described below with reference to the drawings. However, the same parts as those in FIG. 6 are denoted by the same reference numerals, and description thereof is omitted. FIG. 1 is a right side view showing a gas insulated closed switchboard of the present invention, which is shown by a conventional technique .
Is a view corresponding to FIG 6 described. In FIG. 1, partition 1
At the lower part of 3A, below the circuit breaker operating part 32, a bearing part 7, which will be described in detail later with reference to FIG. 2, is mounted. In this bearing part 7, the operating rod 3 is also airtightly provided as described later. ,
A handle 6 is fixed to a front end of the operation rod 3, and a stopper pin 5, which is also described later, is vertically inserted and attached to a rear portion of the operation rod 3. On the other hand, at the lower end of the conductor 27C,
An upper end of a contact plate 4 made of a phosphor bronze plate bent into a substantially Ω shape is fixed, and a lower end of the contact plate 4 is fixed to an upper end of the zero-phase transformer 2 at an upper end of a rear surface of a conductor 29 described later in detail. Is pressed.

FIG. 2 is a sectional view of the bearing 7 and the operating rod 3 shown in FIG.
FIG. 3 shows an enlarged detailed longitudinal sectional view of a portion where the contact plate 4 and the conductor 29 are attached. In FIG. 2, a dish-shaped flange 8 having a round hole formed in the center is hermetically welded to a circular hole provided in the partition 13A in advance. A name plate (not shown) indicating the operation direction of the operation rod 3 described later is attached to the front surface of the partition 13A on the outer periphery of the flange 8, and a bearing 9 having a substantially convex cross section is inserted from the front inside the flange 8. It is
I have. An O-ring groove is formed in advance on the outer peripheral rear surface of the bearing 9 and an O-ring 19 is inserted. An oil seal 10 coated with grease in advance on the inner periphery of the bearing 9 is provided.
Are inserted back and forth across the spacer 10a . The bearing 9 is fixed to the flange 8 by bolts 9b inserted on the outer periphery of the front surface of the bearing 9. An epoxy resin coating 3a having a thickness of about 3 mm is formed on the rear portion of the operation rod 3 by flow coating, and the above-described stopper pin 5 is vertically inserted into the rear end of the operation rod 3.

Next, the operation of the gas-insulated switchboard thus constructed will be described. In the periodic inspection , when the withstand voltage test is performed, in FIG. 1, the handle 6 is grasped and turned 90 ° to the right to push the operating rod 3. Then, handle 6
A stopper (not shown) protruding rearward of the contact plate 9 hits a concave portion 9a shown in FIG. 2 formed on the front surface of the bearing 9, and the rear end protrudes rearward by a predetermined stroke, thereby lowering the lower portion of the contact plate 4 in FIG. Pressing backward as shown in FIG.
Is disconnected from the main circuit. Next, by turning the handle 6 to the left by 90 °, the stopper pin 5 is moved to the right side views (b) and (b) of FIGS. 4 (a) and 4 (a) showing a partially enlarged detailed view of FIG. As shown in FIG.
The contact plate 4 is pushed forward by the elastic restoring force, and stops at the center groove 29a of the conductor 29 whose upper half is press-formed in a corrugated manner.

As a result, in the gas insulated closed switchboard configured as described above, at the time of the withstand voltage test, the door 12A is opened to enter the low-pressure chamber 14, the handle 6 is operated, and the zero-phase transformer 2 is mainly operated. Since the circuit can be disconnected from the circuit and there is no need to replace the sulfur hexafluoride gas with the circuit breaker chamber 16, the withstand voltage test can be completed in a short time.

[0013] Figure 5 shows another embodiment of the present invention the gas-insulated closed switchboard, FRP to the rear end of the operating rod 3 (not shown)
A tube is inserted, a rear end of the FRP tube passes through a round hole (not shown) provided at a lower portion of the contact plate 4, and a spring pin 31 is inserted into the FRP tube at a rear portion of the penetrating portion of the contact plate 4. ing. On the other hand, in front of the partition 25B, a stopper 32 which is formed by pressing a slightly thin mild steel plate in the same shape as the conductor 29 shown in FIG. 4 is fixed.

In this case, by pulling the handle 6 and rotating it about 90 ° to the right or left, it is returned vertically again, and the lower end of the stopper pin 5 is stopped in a groove (not shown) on the front surface of the stopper 32. Similar to the above-described gas-insulated closed switchboard shown in FIGS. 1 to 4, not only can the zero-phase transformer be easily disconnected from the main circuit during a withstand voltage test,
Since the disconnection is performed by the pulling operation and the operation direction matches the on / off operation of a general disconnector, there is an advantage that the operability is good.

In the above embodiment, the description has been given of the case where the electric equipment disconnected from the main circuit for the withstand voltage test is a zero-phase transformer. The same can be applied. Further, in the above embodiment, the case of the power receiving board has been described, but the present invention can be similarly applied to a power feeding board.

[0016]

[Effect of the invention] As described above, according to the invention, the insulating gas is sealed.
Through a bulkhead on one side of the main engine room
Auxiliary equipment room is located next to the main unit room side of the bulkhead.
The auxiliary equipment connected to the high-pressure main engine via the body is stored in the auxiliary equipment room.
One side is connected to the high-voltage main engine
The other side is connected to the connection conductor with elastic force.
Airtightly penetrates the contact piece that touches and the partition on the other side of the main engine room.
The contact piece is separated from the connection conductor by one operation in the axial direction
The locking piece is locked to the connecting conductor by rotating operation, and the contact piece
An operating rod that presses the locking piece against the connection conductor with a reversion force, during the withstand voltage test, the operating rod is operated in the axial direction to turn on and off the disconnection part, Since the connection to the main circuit of the circuit auxiliary machine is connected and disconnected, it is possible to obtain a gas insulated closed switchboard which can easily perform maintenance and inspection without releasing and replacing the insulating gas in the hermetic chamber.

[Brief description of the drawings]

FIG. 1 is a right side view showing an embodiment of a gas-insulated closed switchboard of the present invention.

FIG. 2 is an enlarged view showing a main part of the gas insulated closed switchboard of the present invention.
Detailed longitudinal sectional view.

FIG. 3 is an enlarged detailed vertical sectional view of a main part showing the operation of the gas insulated closed switchboard of the present invention.

FIG. 4 is a view showing the operation of the gas insulated closed switchboard of the present invention, wherein (a) is a detail view of FIG. 3, (b) is a right side view of (a),
(c) is an AA cross-sectional enlarged view of (b).

FIG. 5 is a right side view showing another embodiment of the gas insulated closed switchboard of the present invention.

FIG. 6 is a right side view showing an example of a conventional gas insulated closed switchboard.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conductor, 2 ... Zero phase transformer, 3 ... Operation rod, 4 ... Contact plate,
5 Stopper pin, 6 Handle, 7 Bearing part, 8 Flange, 9 Bearing, 10 Oil seal.

Claims (1)

(57) [Scope of request for utility model registration] An insulating gas is sealed and a high-pressure main engine is housed therein.
Auxiliary equipment room is adjacent to one side of the main engine room via a partition,
Via a connection conductor provided on the main engine room side of the partition wall,
The auxiliary equipment connected to the high-pressure main engine is a gas stored in the auxiliary equipment room.
Insulated closed switchboard, one side is connected to the high-voltage main engine
And the other side is elastic with the connecting conductor.
Airtight between the contact piece that contacts with force and the partition on the other side of the main engine room
And the contact piece is moved forward by one axial operation.
Separate from the connecting conductor and connect the lock piece by rotating operation.
The lock piece is moved forward by the elastic restoring force of the contact piece while being locked to the conductor.
And an operation rod for pressing the connection conductor.
Closed gas-insulated switchboard.