JP3287170B2 - Power receiving device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A conventional power receiving device has a configuration shown in FIGS. In those figures, 1 is a power receiving board,
Reference numeral 2 denotes a fixed partition plate whose upper edge is fixed to the top plate of the power receiving panel 1, and the inside of the power receiving panel 1 is divided into a service side and a spare side. 4 is a service load switch arranged on the left base 3; 5 is a service line of a service power supply connected to one end of the service load switch 4 via a bushing 6; Is a backup line of a backup power supply connected to one end of the backup load switch 7 via a bushing 6.

Reference numeral 9 denotes a ground disconnecting switch arranged in parallel with each of the load switches 4, 7, one end of which is connected to one end of each of the load switches 4, 7 and the other end is grounded. A power fuse 10 has one end connected to the other ends of the load switches 4 and 7 via the bushing 6, and the other end connected to the load via the bushing 6. Reference numeral 11 denotes a fixed contact connected to the other ends of the load switches 4 and 7 via the bushings 6, respectively, and is provided inside the load switches 4 and 7 above.

[0004] Reference numeral 12 denotes elevating means provided at the center of the main body 1;
Is a linked load switch provided on the gantry 13; 15 is a movable contact at both ends of the linked load switch 14; provided above the linked load switch 14 via the bushing 6; Is detachably connected from below.

[0005] A zero-phase current transformer and a ground fault relay are provided at one end of each of the load switches 4 and 7, respectively. In normal times, the service load switch 4 and the linked load switch 14 are turned on to supply power to the load. When a fault occurs in the service line 5, an overcurrent is detected by a zero-phase current transformer and a relay, the service load switch 4 is turned off by the control unit, the backup load switch 7 and the link load switch 14 are connected. Is turned on, and the service line 5 is switched to the backup line 8.

When the load is to be maintained and inspected, the associated load switch 14 is turned off, the load switch on the load side where the maintenance and inspection work is performed is turned off, and only the load for which the maintenance and inspection work is performed is turned off. Turn on the load switch on the load side for which maintenance is not performed, and supply power.

When the link load switch 14 is to be disconnected, the link load switch 14 is moved down by the elevating means 12 to a position where the movable contact 15 is separated from the fixed contact 11, and then pulled forward. . On the other hand, the linked load switch 1
4 is connected by the operation opposite to the above operation.

[0008]

In the case of the above-mentioned conventional apparatus, the associated load switch 14 is lowered by the lifting / lowering means 12;
When the service and standby circuits are disconnected without interruption, there is a problem that an accident in one circuit spreads to the other circuit through a gap between the lower edge of the fixed partition plate 2 and the associated load switch 14. The present invention has been made in view of the above points, and has as its object to provide a power receiving device that prevents an accident in one circuit from spreading to another circuit.

[0009]

Means for Solving the Problems To solve the above problems, a power receiving device of the present invention is provided on one side of a power receiving panel,
One fixed contact connected to the service power source via the service side load switch, one load connected via one power fuse, and the other side in the power receiving panel, A second fixed contact connected via a side load switch and connected to the other load via the other power fuse;
An interlocking load switch, which is provided to be movable up and down and back and forth, and whose movable contacts at both ends are detachably connected to both fixed contacts from below, and a fixed dividing plate disposed between both fixed contacts;
A movable partition plate slidably contacting the fixed partition plate up and down, a stopper for regulating a lowering position of the movable partition plate, and a movable partition plate provided at an upper edge of the linked load switch, and And a receiving portion that contacts the lower edge and moves up the movable partition plate.

[0010]

The power receiving device of the present invention configured as described above has the following features.
A movable partition plate is vertically slidably contacted with a fixed partition plate disposed between the two fixed contacts, and a stopper for regulating a lowering position of the movable partition plate is provided. Since the receiving part which moves up the movable partition plate by contacting the lower edge of the movable partition plate at the moving position is provided, when disconnecting the linked load switch, when the linked load switch is lowered by the lifting / lowering means, the two movable contacts The movable member is disengaged from both fixed contacts, the movable partition plate slides down on the fixed partition plate and moves down, and the gap between the lower edge of the fixed partition plate and the upper edge of the link load switch is closed by the movable partition plate. However, an accident in one circuit does not spread to the other circuit.

Then, the lowering position of the movable partition plate is stopped by being restricted by the stopper, the upper edge of the linked load switch is separated from the lower edge of the movable partition plate, and the linked load switch is pulled forward. Next, when connecting the linked load switch, the linked load switch is moved rearward and moved upward, and the lower edge of the movable segment plate at the lower position is applied to the receiving portion of the upper edge of the linked load switch. contact,
The movable partition plate moves up with the rise of the link load switch,
The movable contact is connected to the fixed contact.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to FIGS. These figures show a state in which both movable contacts are connected to both fixed contacts, and in those figures, the same reference numerals as those in FIGS. 7 to 9 indicate the same or corresponding elements.

Reference numerals 16 and 17 are disposed on the front and rear sides of the main body 1, respectively, and the front and rear plates whose upper and lower dimensions are longer than the fixed dividing plate 2 are attached to the front and rear plates 16 and 17, respectively. Vertical guide plate having an L-shaped cross section in the vertical direction, 1
Reference numeral 9 denotes a through hole provided vertically above and below one of the mounting pieces of the vertical guide plate 18, and reference numeral 20 denotes a bolt inserted through the through hole 19, the through hole of the front plate 16, and the through hole 19 and the through hole of the back plate. The nut 21 is screwed, the mounting piece of the vertical guide plate 18 is attached to the front plate 16 and the rear plate 17, and a predetermined gap is provided between the other guide piece of the vertical guide plate 18 and the fixed partition plate 2. Is formed. Reference numeral 22 denotes a stopper protruding below the guide piece of the vertical guide plate 18.

Reference numeral 23 denotes a receiving portion which is provided upright with a predetermined gap formed on both sides of the upper edge of the link load switch 14, and 24 is provided in a gap between the fixed partition plate 2 and the guide piece of the vertical guide plate 18. The movable partition plate is slidably contacted with the fixed partition plate 2 so as to be movable up and down.
It is supported by. Reference numeral 25 denotes a locking member projecting in front of and behind the upper edge of the movable partition plate 24 on the vertical guide plate 18 side, and abuts against the stopper 22 of the vertical guide plate 18 when the movable partition plate 24 moves down. Supported. Reference numeral 26 denotes a pair of horizontal guide plates provided in the front-rear direction with a predetermined gap formed on both sides of the lower edge of the fixed partition plate 2.

Next, a case where the link load switch 14 is disconnected will be described. When the linked load switch 14 is moved down by the lifting / lowering means 12, both movable contacts 15 are moved to both fixed contacts 1
1 while the movable section plate 24 is in contact with the receiving portion 23 of the link load switch 14, the vertical guide plate 1
8, and is moved downward by its own weight while being guided by the horizontal guide plate 26, the locking body 25 of the movable division plate 24 comes into contact with the stopper 22 of the vertical guide plate 18, and the downward movement position of the movable division plate 24 is regulated.
The movable partition plate 24 stops.

The lower edge of the movable partition plate 24 is
, And then pull the link load switch 14 forward. Accordingly, while the lower edge of the fixed partition plate 2 and the upper edge of the link load switch 14 are closed by the movable partition plate 24, it is possible to prevent an accident of one circuit from spreading to the other circuit.

Next, when connecting the linked load switch 14, the linked load switch 14 is moved backward,
When the link load switch 14 is moved upward by 2, the receiving portion 23 abuts on the lower edge of the movable partition plate 24 at the lower position, and the movable partition plate 24 is guided by the vertical guide plate 18 together with the link load switch 14. And both movable contacts 15 are connected to both fixed contacts 11.

[0018]

Since the present invention is configured as described above, it has the following effects. The power receiving device of the present invention is provided with a stopper 22 for slidingly contacting the movable dividing plate 24 with the fixed dividing plate 2 disposed between the fixed contacts 11 so as to be able to move up and down, and restricting the lower movement position of the movable dividing plate 24. Since the receiving portion 23 is provided at the upper edge of the link load switch 14 to move the movable partition plate 24 upward by contacting the lower edge of the movable partition plate 24 at the lower position, the link load switch 14 is disconnected. In this case, when the linked load switch 14 is moved down by the lifting / lowering means 12, the movable partition plate 24 slides on the fixed partition plate 2 and moves down, so that the stopper 2
2, the lower movement position of the movable partition plate 24 is regulated and stopped, and the gap between the lower edge of the fixed partition plate 2 and the upper edge portion of the cooperative load switch 14 is closed by the movable partition plate 24. The accident can be prevented from spreading to the other circuit.

When the link load switch 14 is further connected, the receiving portion 23 abuts on the lower edge of the movable partition plate 24 at the lower movement position, and the movable load switch 14 is moved up and down.
4 can be moved up.

[Brief description of the drawings]

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

FIG. 2 is a plan view of a part of FIG.

FIGS. 3A and 3B are an enlarged view of an upper part and a lower part of another part of FIG. 1;

4A and 4B are a front enlarged view and a rear enlarged view of a part of FIG.

5A and 5B are a front view and a bottom view of a part of FIG.

6A and 6B are a front view and a right side view of another part of FIG.

FIG. 7 is a schematic front view of a conventional example.

FIG. 8 is a schematic plan view of FIG. 7;

FIG. 9 is a circuit diagram of FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 power receiving board 2 fixed dividing plate 4 service load switch 7 standby load switch 10 power fuse 11 fixed contact 12 elevating means 14 linked load switch 15 movable contact 22 stopper 23 receiving part 24 movable dividing plate

Claims (1)

(57) [Claims] A fixed contact connected to one side of a power receiving panel, connected to a service power supply via a service load switch, and connected to one load via a power fuse. A second fixed contact disposed on the other side of the power receiving panel, connected to the standby power supply via a standby load switch, and connected to the other load via the other power fuse; An interlocking load switch, which is provided to be movable back and forth, and whose movable contacts at both ends are detachably connected to the fixed contacts from below, and a fixed dividing plate disposed between the fixed contacts; A movable partition plate slidably contacting the fixed partition plate vertically; a stopper for regulating a lower position of the movable partition plate; A receiving portion that abuts on a lower edge of the partition plate and moves up the movable partition plate. apparatus.