JPH08329793A - Switchgear - Google Patents

Abstract

PURPOSE: To reduce the size of a switchgear, and reduce the number of part items by making common use of an operation shaft of a power source side disconnector and a load side disconnector. CONSTITUTION: A switchgear has a power source side disconnector 2, a circuit breaker l and a load side disconnector 3 with respective phases of three phases in a vessel in which insulating gas is sealed. Both terminals 11 of the power source side disconnector with respective phases and a power source side blade 13 to open and close both terminals 11 by rotation, are juxtaposed on one side of a single operation shaft 7. Both terminals 19 of the load side disconnector 3 with respective phases and a load side blade 20 to open and close both terminals 19 by rotation, are provided on the other side of the operation shaft 7. When both blades 13 and 20 are connected to the operation shaft 7 by links 21, 22 and 23, operation mechanisms of the two disconnectors are collected together as a single unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch in which an airtight container filled with an insulating gas contains a main circuit consisting of a power source side disconnector, a circuit breaker and a load side disconnector for each phase. Regarding gears.

[0002]

2. Description of the Related Art In a conventional switchgear of this kind, when inspecting a circuit breaker, the power source side disconnecting switch and the load side disconnecting switch on both sides of the circuit breaker are opened by respective operating mechanisms, and the main circuit power source side and load side are opened. Is separated.

[0003]

In the case of the conventional switchgear, since the power source side disconnecting switch and the load side disconnecting switch are operated by their respective operating mechanisms, the storage space for both disconnecting switches becomes large, and the switchgear Is difficult to reduce.

Moreover, since the operating mechanisms of both disconnecting switches are individual, there is a problem that the number of parts is large.

In view of the above points, an object of the present invention is to provide a switchgear in which the space for accommodating the disconnecting switch is reduced, the switchgear is downsized, and the number of parts is reduced.

[0006]

In order to solve the above-mentioned problems, a switchgear according to the present invention comprises a three-phase power source side disconnecting switch and a circuit breaker for each phase in an airtight container filled with an insulating gas. ，
In a switchgear that houses a main circuit consisting of a load-side disconnector, both terminals of the power-side disconnector for each phase, which are installed in parallel on one side of one operating shaft, and the power-supply side that opens and closes by rotating both terminals The blade, both terminals of the load-side disconnector for each phase that are arranged in parallel on the other side of the operating shaft, the load-side blade that opens and closes by rotating both terminals, and the link that is connected to the operating shaft and that rotates both blades. It is equipped with and.

[0007]

In the switchgear of the present invention constructed as described above, both terminals of the three-phase power source side disconnecting switch for each phase are arranged in parallel on one side of one operating shaft, and On the side, both terminals of the load side disconnecting switch for each phase of three phases are installed side by side, and the power supply side blade and the load side blade are rotated by the link connected to the operation shaft, and the power supply side disconnecting switch and Since both terminals of the load-side disconnector are opened and closed, the operating mechanism for the two disconnectors is integrated into one unit, the storage space for both disconnectors can be reduced, the switchgear can be downsized, and the number of parts can be reduced. Will be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to FIGS. 1 is a front view, FIG. 2 is a partially cutaway plan view, and FIG.
Is a right side view, and FIG. 4 is a circuit diagram.

In these figures, 1 is a fixed type circuit breaker,
2 is a power source side disconnector connected to the power source side of the circuit breaker 3, 3 is a load side disconnector connected to the load side of the circuit breaker 4, 4 is a main circuit consisting of a circuit breaker 1, both disconnectors 2 and 3 And three-phase,
The main circuit 4 for each phase is housed in an airtight container filled with an insulating gas such as SF ₆ .

Reference numeral 5 is a vertical frame disposed in front of and behind the container, 6 is a front and rear bending piece formed by bending outward from both upper and lower edges of the frame 5, and 7 is both. An operation shaft 8 rotatably supported in the substantially central portion of the frame 5,
Are two frames in the front-rear direction whose both edges are bent outwardly, and are fixed to the upper and lower ends of both vertical frames 5, respectively. Reference numeral 9 is four insulating plates in the front-rear direction, and the front and rear portions of the upper and lower bent pieces 6 and the lower front and rear bent pieces 6 of the upper and lower frames 5, respectively, are screwed to the front and rear bent pieces 6. Are mounted on the left side of the operating shaft 7 and on the right side of the operating shaft 7.

Numeral 11 denotes both terminals of the power source side disconnector 2 for each phase of three phases, which are arranged side by side on upper and lower insulating plates 9 on the left side of the operating shaft 7, respectively. Reference numeral 12 is an insertion groove formed inside the upper terminal 11.

Reference numeral 13 is a power source side blade consisting of two blade pieces, 14 is a base portion of the power source side blade 13, a support shaft penetrating the lower terminal 11, and 15 is a spring provided on one side of the power source side blade 13. The base of the power supply side blade 13 is pressed against the lower terminal 11.

Reference numeral 16 denotes a holding shaft that penetrates the tip of the power source blade 13, reference numeral 17 denotes a collar that is provided on the holding shaft 16 and holds a gap between two blade pieces, and 18 denotes a tip portion of the power source blade 13. Is a spring provided on the side of the holding shaft 1
When 6 is inserted into the insertion groove 12 and the circuit is closed, the tip ends of both blade pieces of the power supply side blade 13 are pressed against the upper terminal 11 from both sides by the spring 18. In addition, the upper terminal 11 is formed with a taper at a portion where the power supply side blade 13 starts to contact.

Reference numeral 19 denotes both terminals of the load side disconnecting switch 3 for each phase, which are arranged in parallel on the upper and lower insulating plates 9 on the right side of the operating shaft 7 in the case of the power supply side disconnecting switch 2. Similarly to the above, the insertion groove 12 is formed inside each terminal 19 on the upper side, and the load side blade 20 composed of two blade pieces, the support shaft 14, the spring 1
5, a holding shaft 16, a collar 17, a spring 18, etc. are provided.

Reference numeral 21 denotes a main link whose central portion is fixed to the operation shaft 7, and 22 is a pair of power source side links, one end portion of which is connected to one end portion of the main link 21, and the other side of the power source side link 22. The end portion is connected to the central portion of the power supply side blade 13. Reference numeral 23 is a set of two load-side links, one end of which is connected to the other end of the main link 21, and the other end of the load-side link 23 is connected to the center of the load-side blade 20.

Next, the operation will be described. The open circuit condition shown, that is, the power supply side blade 13 and the load side blade 20
When the operation shaft 7 rotates right in FIG. 1 due to the closing operation from the state where the tip ends of the power supply terminals are disconnected from the upper terminals 11 and 19, respectively, the power supply side blade 13 is rotated leftward via the main link 21 and the power supply side link 22. Along with the main link 2
1, the load-side blade 20 rotates rightward via the load-side link 23, the tips of both blades 13 and 20 abut the taper of both upper terminals 11 and 19, resisting the spring 18, both blades 13, The blade pieces of 20 are widened, and the holding shaft 16 and the collar 17 are inserted into the insertion grooves 12 of the upper terminals 11 and 19, and the circuit is closed.

Next, when the operating shaft 7 rotates counterclockwise due to the opening operation, the blade 13 on the power source side rotates to the right and the blade 20 on the load side rotates to the left, contrary to the closing operation, and both blades 13 and 20 come into contact with each other. After disconnecting from 11 and 19, the open circuit state shown in the figure is obtained.

[0018]

Since the present invention is constructed as described above, it has the following effects. In the switchgear according to the present invention, one terminal of the operating shaft 7 is provided with both terminals 11 of the power source side disconnecting switch 2 for each phase in parallel on one side, and the other terminal of the operating shaft 7 has three phases. Both terminals 19 of the load side disconnector 3 for each phase are arranged in parallel, and the power supply side blade 13 and the load side blade 20 are rotated by the links 21, 22, and 23 connected to the operation shaft 7, and the rotation causes the power supply. Since both terminals 11 and 19 of the side disconnecting switch 2 and the load side disconnecting switch 3 are opened and closed, the operation mechanism of the two disconnecting switches 2 and 3 can be integrated into one, and both disconnecting switches 2 and 3 can be operated. The storage space can be reduced, the switchgear can be reduced, and the number of parts can be reduced.

[Brief description of drawings]

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

FIG. 2 is a partially cutaway plan view of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a circuit diagram of FIG. 1.

[Explanation of symbols]

 1 circuit breaker 2 power source side disconnector 3 load side disconnector 4 main circuit 7 operating axis 11 terminal 13 power source side blade 19 terminal 20 load side blade 21 link 22 link 23 link

Claims (1)

[Claims] 1. An airtight container filled with an insulating gas is provided with 3
In a switchgear accommodating a main circuit consisting of a power source side disconnector, a circuit breaker, and a load side disconnector for each phase, the power source side for each phase arranged in parallel on one side of one operating shaft Both terminals of the disconnector, blades on the power supply side that open and close by rotating both terminals, both terminals of the load-side disconnector for each phase that are arranged in parallel on the other side of the operating shaft, and both terminals are rotated. A switchgear provided with a load side blade that opens and closes by means of a blade, and a link that is connected to the operation shaft and that rotates both blades.