JP2002171615A - Ground-based multiple circuit switch with active/standby switching function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a ground-based multiple circuit switch with the same active/ standby function, even if an active/standby switching device and the ground- based multiple circuit switch are arranged independently. SOLUTION: Individual switches 8b-8f and respective switching devices 4, 6 for an active line 3 and a standby line 5 are fabricated in the case together. Respective ends of the individual switches 8b-8f and switching devices 4, 6 are electrically connected to a branch line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground-mounted multi-circuit switch having a regular standby switching function used in an underground power distribution system.

[0002]

2. Description of the Related Art In a case where a service line-standby line system is applied to an underground power distribution system, a circuit configuration shown in FIG.
That is, in this case, the normal standby switching switch 1 and the multi-circuit switch 2 are arranged side by side on the ground. Standby switch 1
A switching switch 4 for the service line 3 and a switching switch 6 for the backup line 5 are provided side by side, and one ends of these switching switches 4 and 6 are electrically connected by a branch line 7. The other end of the switch 4 is electrically connected to the service line 3, and the other end of the switching switch 6 is electrically connected to the spare line 5. In the multi-circuit switch 2, a plurality of individual switches 8a to 8f are juxtaposed, one ends of these individual switches 8a to 8f are electrically connected by a branch line 9, and the other ends of the individual switches 8a are connected to each other. The other ends of the individual switches 8b to 8e are electrically connected to the customer underground cable 11, respectively, and the other ends of the individual switches 8f are electrically connected to the main underground cable 12. Have been.

[0003] When such a normal line-standby line type normal standby switch 1 and a multi-circuit switch 2 are used, the switch 3 of the service line 3 is always closed and the standby line 5 is normally closed. The switching switch 6 of the service line 3 is opened, and when the main line composed of the service line 3 is out of power for some reason, the switching switch 4 of the service line 3 is opened and the switching switch 6 of the backup line 5 is turned on. Thus, power has been supplied from the trunk line composed of the healthy spare line 5 to the respective underground cables 11 for consumers via the multi-circuit switch 2.

[0004] In such a type in which a normal standby switch and a multi-circuit switch are arranged side by side, as shown in FIG. A zero-phase capacitor 13 is connected between the branch line 7 and the ground for detection, and a current transformer 14 is provided on the connection line 10. Further, a switch slave station 15 for operating (including remote operation) and controlling the standby switch 1 is arranged beside the standby switch 1.

In this case, the switch slave station 15 has the following general system functions.

(I) When an accident on the load side of the switching switch 4 (on the side of the customer underground cable 11 or the trunk underground cable 12) is detected, the switching to the switching switch 6 is locked, and a timed sequential transmission system is used. Classify the accident section.

(Ii) When it is determined that the service line 3 on the power supply side (main line) of the switching switch 4 is in an accident, the switching switch 4 is automatically turned on.
Is opened, the switching switch 6 is turned on, and power is transmitted to healthy consumers.

[0008]

However, the following problems are encountered when the normal / standby line type normal / standby switch 1 and the multi-circuit switch 2 shown in FIG. 5 are used. Was.

(A) When a cable is buried underground in a place where there are many customers such as a downtown area and a sidewalk is narrow, a regular standby switch 1 and a multi-circuit switch 2 are juxtaposed due to space restrictions. There are things you can't do. In particular, a plurality of multi-circuit switches 2 may be installed.

(B) When two normal standby switchgears 1 and multiple circuit switchgears 2 are arranged side by side, the installation space in the width direction of the equipment is increased for the following reasons.

* Circuits 1a and 2a for connecting the standby switch 1 and the multi-circuit switch 2 are required as shown in FIG. 6. * The standby switch 1 and the multi-circuit switch are required as shown in FIG. Spaces 1b and 2b on both sides of the switch 2 and a space between the cases are required. (C) The normal standby switch 1 and the multi-circuit switch 2 are high cost because they are independent devices.

Next, a switch substation 15 is provided next to the switch 1 of the regular / standby switching system shown in FIG. 7 when the multi-circuit switch 2 is used. However, there were the following problems.

(A ') There are many customers like a downtown area,
When a cable is buried underground in a place where the sidewalk is narrow, there may be a case where the normal standby switching switch 1, the multi-circuit switch 2, and the switch slave station 15 cannot be arranged side by side due to space restrictions. In particular, a plurality of multi-circuit switches 2 may be installed.

(B ') When three normal standby switchgears 1, multiple circuit switchgears 2, and switchgear slave stations 15 are arranged side by side, the installation space in the width direction of the equipment is increased for the following reasons.

* Circuits 1a and 2a for connecting the standby switch 1 and the multi-circuit switch 2 as shown in FIG. 8 are required. * The standby switch 1 and the multi-circuit switch as shown in FIG. (1) Spaces 1b, 2b on both sides of the case 2 and a space between the cases are required.
In this case, the current transformer 14 for detecting an accident becomes large, and the installation space in the width direction of the device is widened.

An object of the present invention is to provide a ground-installed multi-circuit switch having a regular standby switching function, which can have the same function without juxtaposing an independent ordinary standby switching switch and a multi-circuit switch. Is to do.

It is another object of the present invention to provide a ground-mounted multi-circuit switch with a regular spare switching function that can reduce the installation space.

It is another object of the present invention to provide a ground-mounted multi-circuit switch with a regular spare switching function, which has a simplified structure and can be reduced in cost.

[0019]

According to the present invention, there is provided a ground-mounted multi-circuit switch having a service spare switching function, in which a plurality of individual switches and a service switch for each of a service line and a spare line are incorporated in a case. In addition, they are electrically connected so that power can be switched from the service line and the backup line.

Further, the ground-mounted multi-circuit switch having a service spare switching function according to the present invention is provided with a plurality of individual switches and a service switch for each of a service line and a backup line in a case. The individual switches and one end of each switching switch are electrically connected to each other by a branch line, and the other end of each switching switch is electrically connected to a service line and a spare line. .

Further, the ground-installed multi-circuit switch having the service spare switching function according to the present invention is provided with a plurality of individual switches and a service switch for each of a service line and a backup line in a case. The individual switches and one end of each switching switch are electrically connected to each other by a branch line, and the other end of each switching switch is electrically connected to a service line and a spare line. The underground cable for the customer is electrically connected to the end side.

According to such a ground-installed type multi-circuit switch having the regular standby switching function, the same function can be provided without the need for juxtaposition of the independent standby switching switch and the multi-circuit switch as in the related art. be able to. In addition, if the normal standby switching switch and the multi-circuit switch are configured as one device, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is simplified and the cost is reduced. Can be achieved.

Further, the ground-mounted multi-circuit switch having the service spare switching function according to the present invention is provided with a plurality of individual switches and a service switch for each of a service line and a backup line in a case. The individual switches and one end of each switching switch are electrically connected to each other by a branch line, and the other end of each switching switch is electrically connected to a service line and a spare line. An underground cable for the customer is electrically connected to the end side, a zero-phase capacitor is connected between the branch line and the ground, current transformers are assembled to the service line and the backup line, and the service line and the backup line are connected. A switch substation for automatically operating and controlling each switching switch is provided.

According to such a ground-installed multi-circuit switch having the service spare switching function, it is not necessary to arrange an independent service-standby switch, a multi-circuit switch, and a switch substation independently as in the related art. Can also have the same function. In addition, if the normal standby switching switch and the multi-circuit switch are configured as one device, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is simplified and the cost is reduced. Can be achieved.

Further, the ground-installed multi-circuit switch having the service standby switching function according to the present invention is characterized in that the switch slave station is installed in an underground handhole.

With this configuration, the switch slave station can be installed in an empty space in the underground handhole.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram showing a first example of an embodiment of a ground-mounted multi-circuit switch having a service spare switching function according to the present invention.

In the ground-mounted multi-circuit switch with the regular spare switching function of this embodiment, a plurality of individual switches 8 b
-8f, the switching switches 4 and 6 for the service line 3 and the backup line 5 are arranged. One end of each of these individual switches 8 b to 8 f and each of the switching switches 4 and 6 is electrically connected by a branch line 9. The other ends of the individual switches 8b to 8e are electrically connected to the customer underground cable 11, respectively. The other end of the individual switch 8f is electrically connected to the trunk underground cable 12. The other end of the switching switch 4 is electrically connected to the service line 3, and the other end of the switching switch 6 is electrically connected to the spare line 5.

As described above, the individual switch 8 is provided in the case 16.
b to 8f, the switching switches 4 and 6 of the service line 3 and the backup line 5 are respectively incorporated, and one end thereof is electrically connected by a branch line 9, so that an independent switching switch as in the prior art is provided. The same function can be provided without juxtaposing the multi-circuit switch. In addition, when the normal standby switching switch and the multi-circuit switch are configured as one device as in this example, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is simplified. The cost can be reduced.

FIG. 2 is a longitudinal sectional view showing an example of a device configuration of the ground-installed multi-circuit switch with the regular standby switching function shown in FIG.

In the ground-mounted multi-circuit switch having the regular standby switching function of this example, the individual switches 8 b to 8
g are arranged side by side, and a switching switch 4 for the service line 3 and a switching switch 6 for the backup line 5 are separately arranged on both sides of the individual switches 8b to 8g. One ends of the individual switches 8 b to 8 g and the switching switches 4 and 6 are electrically connected by a branch line 9. The other ends of the individual switches 8b to 8f are electrically connected to the customer underground cable 11, respectively.
The other end of the individual switch 8g is electrically connected to the trunk underground cable 12. The other end of the switching switch 4 is electrically connected to the service line 3. The other end of the switching switch 6
It is electrically connected to the spare line 5. In this case, each customer's underground cable 11, trunk underground cable 12, service line 3, and spare line 5 are respectively drawn into the case 16 via the bushing 17.

Although the example of FIG. 1 shows seven circuits and the example of FIG. 2 shows eight circuits, the number of circuits can be increased or decreased according to the site.

FIG. 3 is a circuit diagram showing a second example of the embodiment of the ground-mounted multi-circuit switchgear having the service standby switching function according to the present invention.

The ground-installed multi-circuit switch with the service spare switching function of the present embodiment has a plurality of individual switches 8 inside a case 16.
The switching switches 4 and 6 for the service lines b to 8f, the service line 3 and the backup line 5 are arranged. One end of each of these individual switches 8 b to 8 f and each of the switching switches 4 and 6 is electrically connected by a branch line 9. The other ends of the individual switches 8b to 8e are electrically connected to the customer underground cable 11, respectively. The other end of the individual switch 8f is electrically connected to the trunk underground cable 12. The other end of the switching switch 4 is a service line 3
Is electrically connected to The other end of the switching switch 6 is electrically connected to the backup line 5. A zero-phase capacitor 13 is connected between the branch line 9 and the ground (case 16). Current transformers 14a and 14b are attached to the service line 3 and the backup line 5, respectively. Further, a switch substation 15 for automatically operating and controlling the switching switches 4 and 6 of the service line 3 and the backup line 5 is provided.

As described above, when the plurality of individual switches 8b to 8f and the switching switches 4 and 6 of the service line 3 and the backup line 5 are incorporated into the case 16 and one end thereof is electrically connected. In addition, the same function can be provided without disposing the independent standby switch and the multi-circuit switch in parallel as in the related art. In addition, when the normal standby switching switch and the multi-circuit switch are configured as one device as in this example, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is simplified. The cost can be reduced. Further, since the current transformers 14a and 14b are respectively assembled to the service line 3 and the spare line 5 outside the case 16, it is possible to prevent the case 16 from being enlarged.

FIG. 4 is a longitudinal sectional view showing an example of a device configuration of the ground-mounted multi-circuit switch having the service standby switching function shown in FIG.

In the ground-mounted multi-circuit switch with the regular standby switching function of this example, the individual switches 8 b to 8
g are arranged side by side, and a switching switch 4 for the service line 3 and a switching switch 6 for the backup line 5 are separately arranged on both sides of the individual switches 8b to 8g. One end of each of the individual switches 8b to 8g and one end of the switching switches 4 and 6 is electrically connected by a branch line 9. The other ends of the individual switches 8b to 8f are electrically connected to the customer underground cable 11, respectively. The other end of the individual switch 8g is electrically connected to the trunk underground cable 12. The other end of the switching switch 4 is electrically connected to the service line 3. The other end of the switching switch 6 is electrically connected to the backup line 5. A zero-phase capacitor 13 is electrically connected between the branch line 9 and the ground (case 16). Current transformers 14a, 1
4b are respectively assembled. In the underground handhole 18, switching switches 4, 6 for the service line 3 and the backup line 5 are provided.
Is automatically installed and operated. In this case, each customer's underground cable 11, trunk underground cable 12, service line 3, and spare line 5 are respectively drawn into the case 16 via the bushing 17.

According to such a ground-installed multi-circuit switch having the service spare switching function, the independent service-standby switch 1, the multi-circuit switch 2, and the switch substation 15 are provided independently as in the prior art. The same function can be provided without doing so. Also,
When the normal standby switch 1 and the multi-circuit switch 2 are configured as one device, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is simplified and the cost is reduced. Can be achieved. Further, when the switch slave station 15 is installed in the underground handhole 18, the switch slave station 15 does not need to be installed on the ground.

Although the example of FIG. 3 shows seven circuits and the example of FIG. 4 shows eight circuits, the number of circuits can be increased or decreased according to the site.

[0040]

According to the ground-based multi-circuit switchgear having a service spare switching function according to the present invention, a plurality of individual switches and a service switch for each of a service line and a backup line are arranged in a case. Since one end of each of the switches and each of the switching switches is electrically connected by a branch line, the same function can be provided without the need for juxtaposing an independent normal standby switching switch and a multi-circuit switch. Further, in the present invention, since the normal standby switching switch and the multi-circuit switch are configured as one device, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is small. It can be simplified and cost can be reduced.

Also, in the ground-based multi-circuit switch having the service spare switching function according to the present invention, a plurality of individual switches and each of the service switches for the service line and the backup line are arranged in a case, and these individual switches are arranged. One end of the switch and each switching switch is electrically connected with a branch line, and a switch slave station that automatically operates and controls each switching switch of the service line and the backup line is provided. In addition, the same function can be provided without the need for juxtaposition of independent standby switching switches, multi-circuit switches, and switch slave stations.
In addition, if the normal standby switching switch and the multi-circuit switch are configured as one device, the installation space can be reduced, the installation can be easily performed even in a narrow sidewalk, and the structure is simplified and the cost is reduced. Can be achieved.

Further, in the ground-installed multi-circuit switch having the regular standby switching function according to the present invention, the switch slave station is installed in the underground handhole, so that the switch slave station does not need to be installed on the ground. Will be.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a first example of an embodiment of a ground-installed multi-circuit switch with a regular standby switching function according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an example of a device configuration of the ground-mounted multi-circuit switchgear having a regular standby switching function shown in FIG.

FIG. 3 is a circuit diagram of a second example of the embodiment of the ground-mounted multi-circuit switch with the service standby switching function according to the present invention;

FIG. 4 is a longitudinal sectional view showing an example of a device configuration of the ground-mounted multi-circuit switch with the regular standby switching function shown in FIG. 3;

FIG. 5 is a circuit diagram when a conventional standby switch and a multi-circuit switch are arranged in parallel.

FIG. 6 is a longitudinal sectional view showing an example of a device configuration of the conventional ordinary standby switching switch and the multi-circuit switch shown in FIG.

FIG. 7 is a circuit diagram in a case where a conventional standby switchgear, a multi-circuit switchgear, and a switch slave station are provided side by side.

FIG. 8 is a longitudinal sectional view showing an example of a device configuration of the conventional normal standby switching switch, the multi-circuit switch, and the switch slave station shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Standby switching switch 2 Multi-circuit switch 3 Service line 4 Switching switch 5 Spare line 6 Switching switch 7 Branch line 8a-8g Individual switch 9 Branch line 10 Connection line 11 Underground cable for customer 12 Underground cable for trunk line 13 Zero phase capacitor 14, 14a, 14b Current transformer 15 Switch slave station 16 Case 17 Bushing 18 Hand hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasunori Kanmori 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Inside Kansai Electric Power Company (72) Inventor Junji Taniguchi 3-3-1 Nakanoshima, Kita-ku, Osaka, Osaka No. 22 Kansai Electric Power Co., Inc. (72) Akira Baba, inventor 2-1-1 Tagawa, Yodogawa-ku, Osaka, Osaka Prefecture Daihen Co., Ltd. (72) Tomichi Akiyama 2-1-1 Tagawa, Yodogawa-ku, Osaka, Osaka No. 11 Daihen Co., Ltd. (72) Inventor Daisuke Shiga 2-11-11 Tagawa, Yodogawa-ku, Osaka-shi, Osaka Dainai Co., Ltd.

Claims (5)

[Claims] 1. A plurality of individual switches and respective switching switches for a service line and a backup line are incorporated in a case, and are electrically connected so that switching power can be supplied from the service line and the backup line. A ground-mounted multi-circuit switch with a regular standby switching function. 2. A plurality of individual switches and service switches and spare switches are arranged in a case, and one end of each of the plurality of individual switches and each switch is electrically connected to each other by a branch line. And the other end of each of the switching switches is electrically connected to the service line and the spare line. 3. A plurality of individual switches and service switches and spare switches are arranged in a case in parallel, and one end of each of the plurality of individual switches and each switch is electrically connected to each other by a branch line. Are connected to the other end of each switching switch, the service line and the spare line are electrically connected, and the other end of each individual switch is electrically connected to a customer underground cable. A ground-mounted multi-circuit switch with a regular standby switching function. 4. A plurality of individual switches, service switches and spare switches are arranged side by side in the case, and one end of each of the plurality of individual switches and each switch is electrically connected to each other by a branch line. Are connected to the other end of each switching switch, the service line and the spare line are electrically connected, and the other end of each individual switch is electrically connected to a customer underground cable. A zero-phase capacitor is connected between the branch line and the ground, a current transformer is assembled to the service line and the backup line, respectively, and the switching switches of the service line and the backup line are automatically connected. A ground-mounted multi-circuit switch with a regular standby switching function, wherein a switch sub-station for operation and control is provided. 5. The ground-mounted multi-circuit switchgear with a regular standby switching function according to claim 4, wherein the switch substation is installed in an underground handhole.