JPH0847118A - Incoming panel of normal-service and standby changeover type - Google Patents

Abstract

PURPOSE:To miniaturize an incoming-panel body by a method wherein a raising and lowering means by which outgoing disconnection parts at both ends of a linkage load switch are moved up and down is installed and both outgoing disconnection parts are connected to both fixed disconnection parts on the normal-service side and on the standby side by the raising and lowering means from the lower part. CONSTITUTION:When a maintenance and inspection operation is to be performed, load switches 4, 5 on the side of a load to which the maintenance and inspection operation is to be performed and a linkage load switch 13 are turned off, and only the load to which the maintenance and inspection operation is to be performed is set to a service interruption, i.e., to a one-side service interruption. When the linkage load switch 13 is to be disconnected, the linkage load switch 13 is lowered by a raising and lowering means 15 down to a position in which outgoing disconnection parts 14 are separated from fixed disconnection parts 12, and it is then pulled out to the front. When the linkage load switch 13 is to be connected, it is connected by an operation which is reverse to an operation at a time when it is disconnected. Thereby, the depth size of an incoming-panel body 1 can be reduced, and the incoming-panel body 1 can be miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regular / preliminary switching type power receiving panel for detecting an overcurrent and switching from a regular line to a standby line when an accident occurs.

[0002]

2. Description of the Related Art A conventional normal / preliminary switching type power receiving panel has a structure shown in FIGS. In those figures,
Reference numeral 1 is a main body of a normal / preliminary switching type power receiving panel, 2 is a partition plate for partitioning the main body 1 into a regular side and a spare side, 3 is a base arranged under the main body 1, and 4 and 5 are both sides on the base 3. Load switch, standby load switch, 6, 7
Is a service line and a backup line connected to one end of both load switches 4 and 5 through a bushing 8.

Reference numeral 9 is a grounding disconnecting switch provided in parallel with both load switches 4 and 5, one end of which is connected to one end of both load switches 4 and 5 and the other end of which is grounded. Reference numeral 10 denotes a power fuse whose one end is connected to the other ends of the load switches 4 and 5 via the bushing 8, and the other end is connected to the load via the bushing 8. 11 is a double load switch 4 at both ends
5 is a linking conductor that is connected to the other end of 5 via each bushing 8.

A zero-phase current transformer and a ground fault relay are provided at one ends of both load switches 4 and 5, respectively, and normally, only the load switch 4 on the service side is turned on to supply power to the load. When a line 6 accident occurs, an overcurrent is detected by the zero-phase current transformer and relay, and the control line switches from the service line 6 to the backup line 7. Further, when the load is to be maintained and inspected, the load switch 4 which is being energized is turned off.

By the way, there is a problem that even when only one of the loads is maintained or inspected, the other load is also turned off and the unnecessary load is out of power. Therefore, it is conceivable to reduce the power outage range by performing a power outage for only the load for maintenance and inspection work, that is, one-sided power outage.

Next, another conventional example in which the power failure range is reduced will be described with reference to FIGS. In these figures, the same reference numerals as those in FIGS. 3 and 4 indicate the same or corresponding parts.

Reference numeral 12 is a fixed disconnecting portion provided at the other end of both load switches 4, 5 and is located behind both load switches 4, 5 via a bushing 8. Reference numeral 13 is a link load switch provided in the center of the base 3 so as to be movable in the front-rear direction, and 14 is a withdrawal disconnector section provided at both ends of the link load switch 13, which is a link load switch via the bushing 8. Bowl 1
It is located at the rear of 3 and is detachably connected to both fixed disconnecting sections 12.

At normal times, the normal load switch 4 and the link load switch 13 are turned on to supply power to the load.
During maintenance and inspection, turn off the linked load switch 13
Turn off the load switch on the load side to perform inspection work,
Turn off only the load to be inspected and turn on the load switch on the load side that is not to be inspected for power supply.

Further, when disconnecting the link load switch 13, the link load switch 13 is pulled out to the front side, and when the pull-out disconnection part 14 is detached from the fixed disconnection part 12 and connected, the reverse operation is performed. To do.

[0010]

5 to 7 of the prior art.
In the case of the above-mentioned regular / preliminary switching type power receiving panel, the fixed disconnector 1
2. Since the pull-out disconnecting section 14 is located behind the link load switch 13, there is a problem that the depth dimension of the main body 1 becomes large and the size becomes large. The present invention has been made in consideration of the above points, and an object of the present invention is to provide a regular / preliminary switching type power receiving panel which enables one side power failure and downsizing of the power receiving panel body.

[0011]

In order to solve the above-mentioned problems, in the service / preliminary switching type power receiving panel of the present invention, one end is connected to a service line and the other end is connected to a load via a fixed disconnecting section. The load switch on the service side, the load switch on one side connected to the spare line at one end and the load on the other end via the fixed disconnection section, and the disconnection disconnection sections at both ends from below the fixed disconnection section. It is provided with an interconnecting load switch which is detachably connected and an elevating means for moving up and down both of the pullout disconnecting path sections.

[0012]

The normal / preliminary switching type power receiving board of the present invention constructed as described above is provided with the elevating means for vertically moving the pull-out disconnecting path portions at both ends of the link load switch, and both the normal side and the standby side fixed disconnecting paths. Since both of the pull-out disconnection sections are connected to the section from below by means of lifting means, the load switch on the load side for maintenance and inspection and the linked load switch are turned off so that one-sided power failure occurs only on the load for maintenance and inspection. This makes it possible to reduce the power outage range, eliminate the need for a depth dimension for connecting and disconnecting the link load switch, and reduce the size of the power receiving panel body, resulting in cost reduction.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to FIGS. In these drawings, the same reference numerals as those in FIG. 3 to FIG. 7 indicate the same or corresponding ones, and the difference from FIG. 5 and FIG. 6 is that both the fixed disconnecting sections 12 are located above the respective load switches 4 and 5. Is provided through the bushing 8 to
A withdrawal disconnecting section 14 is provided above the link load switch 13 via a bushing 8, and a vertically moving vertically moving means 15 is provided at the center of the main body 1, and the link load opening / closing is provided on a frame 16 on the upper surface of the vertically moving means 15. This is the point where the container 13 is provided.

When performing maintenance and inspection work, the load side switch and the associated load switch 13 on the load side to be maintained and inspected are turned off in the same manner as in the conventional example, and only the load to be maintained and inspected is cut off. Turn off one side.

Then, when disconnecting the link load switch 13, the link load switch 13 is lowered by the elevating means 15 to the position where the pull-out disconnection section 14 is separated from the fixed disconnection section 12, and then pulled out forward. On the other hand, the linked load switch 1
When 3 is connected, the reverse operation of the above operation is performed.
Therefore, the depth dimension of the main body 1 is reduced, the main body 1 can be downsized, and the cost is reduced.

[0016]

Since the present invention is constructed as described above, it has the following effects. The normal / preliminary switching type power receiving panel of the present invention is provided with an elevating means 15 for vertically moving the withdrawal disconnection sections 14 at both ends of the link load switch 13, and both withdrawal disconnection sections are provided at both the fixed side disconnection sections 12 on the regular side and the spare side. Since the connecting means 14 is connected from below by means of the lifting means 15, the load switch on the load side for maintenance and inspection and the link load switch 13 for the maintenance are turned off to enable one-sided power failure of only the load for maintenance and inspection. In addition, the power outage range can be reduced, the depth dimension for connecting and disconnecting the link load switch 13 can be eliminated, and the power receiving panel body 1 can be downsized and made inexpensive.

[Brief description of drawings]

FIG. 1 is a schematic front view of an embodiment of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a schematic front view of a conventional example.

FIG. 4 is a circuit diagram of FIG.

FIG. 5 is a schematic front view of another conventional example.

6 is a schematic plan view of a portion of FIG.

FIG. 7 is a circuit diagram of FIG.

[Explanation of symbols]

 4 Regular load switch 5 Backup side load switch 6 Regular line 7 Spare line 12 Fixed disconnection section 13 Linking load switch 14 Drawout disconnection section 15 Elevating means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shuichi Hayashi, Nissin Electric Co., Ltd., 47 Umezu Takaunecho, Ukyo-ku, Kyoto

Claims (1)

[Claims] 1. A service load switch, one end of which is connected to a service line and the other end of which is connected to a load through a fixed disconnection part, and one end of which is connected to a backup line and the other end of which is connected through a fixed disconnection part. Backup load switch connected to the load, a link load switch in which pull-out disconnection sections at both ends are detachably connected to the fixed disconnection sections from below, and lifting means for moving the pull-out disconnection sections up and down. A regular and standby switching type power receiving board equipped with and.