JP2000201409A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulated switchgear which can be installed to the shoulder of a road or the rooftop of a building, by constituting the switchgear in such a way that an operating mechanism is arranged on the rear side of a protective relay device arranged in the upper section of the switchgear and, at the same time, the relay device can be pulled out of a casing when the device is rotated around its fulcrum. SOLUTION: An operating mechanism 4 which collectively operates vacuum valves in three phases is arranged on the backside above an insulated switchgear 3 and a protective relay device 6 is arranged above a bus-side conductor 5 in front of the mechanism 4. On the backside of the relay device 6, in addition, a manual button which opens and closes the switchgear 3 is provided. When an accident happens, the relay device 6 is operated and controls the operating mechanism 4 so that any one of cutting-off operation, disconnecting operation, and grounding operation may be carried out automatically in accordance with a command from a controller 7. The relay device 6 is rotatably supported at its one end so that the device 6 may be pulled out of a casing when the device is rotated around the supporting section 14. Therefore, the switchgear 3 can be installed to the shoulder of a road or the rooftop of a building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear having an insulated switchgear, a protective relay, a controller and the like, and more particularly to a compact switchgear.

[0002]

2. Description of the Related Art As a conventional technique, as described in Japanese Patent Application Laid-Open No. 9-153320, a movable conductor provided in one vacuum vessel is closed while rotating between a fixed conductor and a ground conductor. Position, open position, disconnection position, and ground position, and are connected to the movable conductor, the fixed conductor, the vacuum container containing the ground conductor, the bus-side conductor connected to the fixed conductor, the ground conductor, and the movable conductor. There is an insulated switchgear in which a load-side conductor is molded with epoxy resin.

[0003]

The insulated switchgear disclosed in Japanese Patent Application Laid-Open No. 9-153320 has a compact insulated switchgear. However, the protection relay device, the controller and other devices are compact. For placing,
It was not considered.

A first object of the present invention is to provide a switchgear that can be installed on a road shoulder or on a roof.

A second object of the present invention is to provide a switchgear which is reduced in size by appropriately arranging an insulated switchgear, a protective relay, and an operation mechanism.

A third object of the present invention is to provide a switchgear with improved safety.

[0007]

In order to achieve the above object, a switchgear of the present invention comprises a protective relay at the top of an insulated switchgear and the insulated switchgear at the rear of the protective relay. An operation mechanism for operation is disposed, and the protection relay device is configured to be rotatable about a fulcrum of the protection relay device and pulled out of the jacket.

In addition, a bus-side conductor and a protective relay are arranged in this order on the upper part of the insulated switchgear, and an operating mechanism for operating the insulated switchgear is disposed on the rear side of the protective relay.

In addition, a protective relay is disposed above the insulated switchgear, and an operating mechanism for operating the insulated switchgear is disposed on the rear side of the protective relay. The "ON" and "OFF" buttons of the operation mechanism are arranged, and the status display section of the operation mechanism is arranged beside the protective relay.

Further, an external ground terminal and a cable head are arranged below the insulated switchgear.

Further, the switchgear is divided into three lines for one phase and three lines.
Lines are arranged side by side, two lines for power distribution and one for distribution
A frame was provided between the line for branching, and a door was provided for each of two lines for power distribution and one line for branching. Further, the insulated switchgear is configured to take four positions of closing, disconnecting, disconnecting, and grounding in the jacket or take three positions out of the four positions.

The switchgear is divided into three lines for one phase and three lines.
Lined side by side, 1100mm wide, 450mm deep,
It was constructed in a space with a height of 1450 mm or less.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
0 will be described. 1 is a front view of the switchgear according to the present embodiment, FIG. 2 is a side view as viewed from an arrow AA in FIG. 1, FIG. 3 is a rear view as viewed from an arrow BB in FIG. FIG.
FIG. 5 is a plan view as seen from the direction of arrows CC in FIG.
D, FIG. 6 is a plan view as seen from the direction of arrows EE in FIG. 1, FIG. 7 is a vertical cross-sectional view of the insulated switchgear, and FIGS. FIG.

The switchgear of this embodiment is configured as follows. In the metal jacket 1, three lines are housed side by side with three lines of switch gear for one phase. The three switchgears are composed of one regular line, one standby line for power distribution, and one branch line. A cable head 2 fixed and supported by a support 15 is arranged on the front side and lower side in the metal jacket 1, and the cable head 2 is, as shown in FIG. It is connected to the.

The insulating switchgear 3 is configured as shown in FIG. The vacuum valve 51 is disposed on the front side of the jacket 1, and a movable conductor 52 drawn out of the vacuum valve 51 via a bellows 67 from the main body of the vacuum valve 51 is disposed on the rear side. A grounding contact 54 is provided below the vacuum valve 51, and is connected to an external grounding terminal 57 provided on the front side of the jacket 1 by a grounding conductor 56 sealed by a sealing portion 55. The grounding device 54a is provided with a spring mechanism so as to absorb the displacement of the movable conductor 52 and the impact force. A fixed contact 58 is provided on the upper side in the vacuum valve 51, and is connected to the bus-side conductor 5 molded with epoxy resin via a fixed conductor 66. A movable contact 60 that is turned by the turning movement of the movable conductor 52 is disposed between the fixed contact 58 and the ground contact 54. A support point 61 is provided on the movable conductor 52, and a connecting portion 63 with the rod 62 is provided behind the support point 61. The rod 62 is connected to the operation mechanism 4 via an insulator. A metal container 6 is provided outside the ground contact 54, the fixed contact 58, and the movable contact 60.
4 are provided, and insulators 65 a, 65 b, made of ceramics are provided above and below the container 64 and outside the movable conductor 52.
65c is provided. The fixed conductor 66 is attached to the insulator 65a, and the ground conductor 56 is attached to the insulator 65b. A bellows 67 is provided inside the insulator 65c. One end of the bellows 67 is welded to a metal object 68 fixed to the insulator 65c, and the other end of the bellows 67 is welded to the movable conductor 52. Thus, the vacuum valve 5
1 is sealed and maintains a vacuum state. The vacuum valve 51 is configured to take four positions of closing, disconnecting, disconnecting, and grounding, but it may be configured to take three positions of closing, disconnecting, and grounding, or three positions of closing, disconnecting, and grounding. it can.

The load-side conductor 53 electrically connected to the movable conductor 52 includes a conductor 53a extending downward and a ground conductor 5a.
6 is formed of a conductor 53b extending to the front side of the jacket 1 below the conductor 6, and the conductor 53b is connected to the cable head 2. A current transformer 75 is mounted around the conductor 53a, and a terminal 71 is provided below the current transformer 75 via a conductor 69 and a capacitor 70, so that the voltage of the load-side conductor 53 can be measured. ing. The periphery of the vacuum valve 51 is integrally molded with an epoxy resin 73 as shown in FIG. That is, the front side of the vacuum valve 51, the ground conductor 56, the load side conductor 53, the rear side of the movable conductor 52, and the periphery of the fixed conductor 66 are molded with epoxy resin 73. An opening is provided in the mold on the front side of the vacuum valve 51, and an O-ring is interposed therebetween.
The cover 72 is fixed by bolts. The upper part of the fixed conductor 66 and the rod 6
An opening is formed in the upper part of 2. Fixed conductor 66
In the mold on the front side of the vacuum valve 51, a bus-side conductor 5 molded with bolts using an opening is fixedly supported. A rod connected to the operation mechanism 4 via an insulator is provided in an opening above the rod 62, and is sealed by a seal member. Vacuum valve 51
SF ₆ gas is sealed in the space between the mold and the mold forming portion, so that even if the dielectric breakdown occurs by the vacuum valve 51, the switch gear is not affected.

As shown in FIG. 3, an operation mechanism 4 for operating the three-phase vacuum valves 51 in a lump is disposed on the rear side above the insulating switchgear 3. The operation mechanism 4 is configured to take four positions as described later. On the front side above the insulated switchgear 3, bus-side conductors 5 are arranged side by side for three phases. On the front surface of the operation mechanism 4, above the bus-side conductor 5, a protective relay device 6 is arranged, and on the rear surface side of the protective relay device 6 of the operation mechanism 4, the insulated switchgear 3 is opened. A button 19 and a manual button such as an “ON” button 20 for closing are provided. Further, a handle mounting portion for urging a spring force of the operation spring of the operation mechanism 4 is provided. On the front side of the operation mechanism 4 that is not hidden by the protective relay 6, a manual switching device for manually switching between a cutoff position, a disconnection position, and a ground position, and a display unit 18 for displaying a position state are provided.

In the case of manual operation, when the "ON" button 20 is turned on, the operating mechanism 4 pushes down the movable conductor 52 and the movable contact 60 comes into contact with the fixed contact 58 as shown in FIG. From the busbar side conductor 5 to the movable conductor 5
2, power is supplied from the cable head 2 to the load-side conductor.

Set to the shut-off position by a manual switching device,
When the "OFF" button 19 is turned on, the operation mechanism 4 operates to move the movable conductor 52 to the cutoff position, and the cutoff is completed, as indicated by the dotted line in FIG. When the disconnection position is set by the manual switching device and the "OFF" button is turned on, the operation mechanism 4 operates to move the movable conductor 52 to the disconnection position as shown in FIG. When the switch is set to the ground position by the manual switching device and the “OFF” button is turned on, FIG.
As shown at 0, the operating mechanism 4 operates to move the movable conductor 52 to the ground position, the movable conductor 52 comes into contact with the grounding device 54a, and the switchgear is grounded.

Although the manual operation has been described above, in the event of an accident, the protective relay 6 operates so that any of the operations of disconnection, disconnection, and grounding is automatically performed according to a command from the controller 7. The operation mechanism 4 is controlled.

The protection relay device 6 is rotatably supported at one end, and rotates around the support portion 14 as shown in FIG. It can be pulled out. A controller 7 for receiving a signal from the protection relay device 6 and controlling the operation mechanism 4 is disposed beside the protection relay device 6.

As described above, the manual switching device and the display unit 18 for displaying the position state are provided on a surface which is not hidden by the protective relay device.
On the rear side of the protection relay device, a manual button of an "off" button 19 for opening the insulated switchgear 3 and an "on" button 20 for closing the insulation switch device 3 is installed, and the protection relay device is provided with a cover. Since it is configured to be able to be pulled out to the outside, the installation space for the operation mechanism and the protection relay device can be reduced. Further, the state of the operation mechanism can be confirmed with the door opened. In addition, since it can be rotated around the fulcrum and can be pulled out of the jacket 1, it can be pulled out with one hand, and work safety is improved.

A bus conductor is arranged on the front side above the insulated switchgear, and a protective relay is arranged above the bus conductor. The connection portion with the conductor can be shortened, the loss due to resistance can be reduced, and the capacity of the mold formation portion can be reduced.

An external ground terminal 57 is provided on the upper part of the cable head 2.
Are connected by a ground conductor 11 to a frame 12 provided inside the jacket 1.

Two lines of switch gears are housed side by side on the left side of the jacket 1, and one line of switch gears are housed side by side. Between the two-line switchgear and the one-line switchgear, FIG.
6, a frame 13 is provided, and doors 9a and 9b are attached to both sides of the frame 13. On the back side of the door 9a, a handle 74 is detachably installed. The door 9a is provided with a stopper 16a and the door 9b is provided with a stopper 16b.
It is stopped at 6a, 16b and is not opened any more.

As described above, by providing the frame 13 between the two-line switchgear and the one-line switchgear, the rigidity of the box can be increased, and the switchgear for branching that does not normally need to be opened. By distinguishing from
Safety can be improved. Ventilator 8a, 8b is provided on the front side of operation mechanism 4 on both sides of the upper part of jacket 1, and ventilator 10 is provided below door 9b attached to the front side of jacket 1. ing. By providing the ventilators 8a, 8b and 10 in this manner, the air sucked from the ventilator 10 is warmed inside the jacket 1 and rises, and flows out of the ventilators 8a and 8b. This air flow cools each device arranged in the jacket 1.

As described above, since the switchgear of the present embodiment is configured, when applied as a 22 kV power receiving and distributing facility, three lines have a width of 1100 mm, a depth of 450 mm,
It can be installed in a space with a height of 1500 mm or less. Because of the miniaturization in this way, it can be installed on the roadside or on the roof. In addition, it can be freely arranged according to the building.
Since the height is as low as 1500 mm or less, inspection and parts replacement can be easily performed.

[0028]

According to the present invention described above, it can be installed on the shoulder of a road or on a roof, and the arrangement of the insulated switchgear, the protective relay, and the operation mechanism can be appropriately reduced in size.
Furthermore, a switchgear with improved safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a switchgear according to an embodiment of the present invention.

FIG. 2 is a side view seen from an arrow AA in FIG.

FIG. 3 is a front view as viewed from an arrow BB in FIG. 2;

FIG. 4 is a plan view seen from an arrow CC in FIG. 1;

FIG. 5 is a plan view seen from an arrow DD in FIG. 1;

FIG. 6 is a plan view seen from an arrow EE in FIG. 1;

FIG. 7 is a longitudinal sectional view of the insulated switchgear.

FIG. 8 is a longitudinal sectional view of a vacuum valve.

FIG. 9 is a longitudinal sectional view of a vacuum valve.

FIG. 10 is a longitudinal sectional view of a vacuum valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Jacket, 2 ... Cable head, 3 ... Insulated switchgear, 4
... operating mechanism, 5 ... bus conductor, 6 ... protection relay device, 7 ...
Controller, 8, 10 Ventilator, 9 Door, 10
... Ventilator, 11,56 ... Ground conductor, 12,13 ...
Frame, 14 ... Support, 15 ... Support, 16 ... Stopper, 18 ... Display, 19 ... "Off" button, 20 ...
"Enter" button, 51 ... Vacuum valve, 52 ... Movable conductor, 5
3: Load side conductor, 54: Ground contact, 55: Sealing part, 57
... external ground terminal, 58 ... fixed contact, 60 ... movable contact, 6
DESCRIPTION OF SYMBOLS 1 ... Support point, 62 ... Rod, 63 ... Connection part, 64 ... Container, 65 ... Insulator, 66 ... Fixed conductor, 67 ... Bellows,
68 ... metal object, 69 ... conductor, 70 ... capacitor, 71 ...
Terminals, 72: cover, 73: epoxy resin, 74: handle, 75: current transformer.

Continued on the front page (72) Inventor Toru Tanimizu 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant, Hitachi, Ltd. (72) Inventor Noriyasu Watanabe 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant of Hitachi, Ltd. (72) Koichi Murata, inventor 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Zenji Yonemoto 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company

Claims (7)

[Claims] 1. A protection relay device is disposed above an insulated switchgear, and an operation mechanism for operating the insulated switchgear is disposed on a rear side of the protection relay device. A switchgear configured to be rotatable about the center and drawn out of the jacket. 2. A switchgear in which a bus-side conductor and a protective relay are arranged in this order on an insulated switchgear, and an operating mechanism for operating the insulated switchgear is disposed on a rear side of the protective relay. . 3. A protective relay device is disposed above the insulated switchgear, and an operating mechanism for operating the insulated switchgear is disposed on the rear side of the protective relay device. A switchgear in which the "ON" and "OFF" buttons of the operation mechanism are arranged on the front side of the operation mechanism and on the side of the protective relay device. 4. The switchgear according to claim 1, wherein an external ground terminal and a cable head are disposed below the insulated switchgear. 5. The three-phase switchgear according to claim 4, wherein
Three lines are juxtaposed, and a frame is provided between two power distribution lines and one branch line, and two power distribution lines and one branch line are provided. Switchgear with doors for each of them. 6. The insulated switchgear according to claim 1, wherein the insulated switchgear is configured to take one of four positions, that is, closing, disconnecting, disconnecting, and grounding, or three of the four positions. A switchgear according to any of the claims. 7. The switchgear according to claim 1, wherein three lines are arranged side by side as one line for three phases, wherein the switchgear is configured in a space having a width of 1100 mm, a depth of 450 mm, and a height of 1500 mm or less. Switchgear.