JP3215216B2 - Metal closed switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention particularly relates to a metal-closed switchgear provided with a double busbar.

[0002]

2. Description of the Related Art FIG. 7 is a right side view showing a conventional metal-closed switchgear having a double bus bar arranged vertically. In FIG. 7, a partition 10A is provided vertically at a front portion of a box 21 whose outer periphery is surrounded by mild steel plates, and a short partition 10B is provided vertically above a rear portion of the partition 10A. At the rear of the partition 10A, a partition 10C is provided laterally in the middle slightly above, and below the partition 10C, a partition 10D is provided horizontally.

A box 21 is provided in front of the partition 10A.
An operation mechanism room 21b is formed between the door and the door 21a provided in front of the circuit breaker. A circuit breaker room 21c is provided above the partition 10C, and an upper disconnector room 21d is provided below the circuit breaker room 21c. Disconnector chamber 21f is formed in order. A cable room 21g is formed at the rear of the circuit breaker room 21c.

A vacuum circuit breaker 22 is housed in the circuit breaker chamber 21c and is fixed to the partition 10A. The upper electrode of the vacuum circuit breaker 22 is connected to the front end of the insulating spacer 11 penetrating the partition 10B via the conductor 12C, and the lower electrode of the vacuum circuit breaker 22 is connected to the insulating spacer 11 vertically mounted on the partition 10C. Connected to the upper end.

An upper disconnector 23 is accommodated in the upper disconnector chamber 21d, and a front end is fixed to the partition 10A. The upper end of the upper disconnector 23 passes through the conductor 12D and is located above the insulating spacer.
11 is connected to the lower end, and the lower end of the upper disconnector 23 is
D is connected to the upper end of an insulating spacer 11 vertically provided. The tip of the blade of the upper disconnector 23 is now inserted into a clip whose details have been omitted.

On both sides of the upper disconnector chamber 21d in the direction perpendicular to the plane of the drawing, a rectangular opening is formed vertically in the above-described mild steel plate on the outer periphery, and an insulating spacer 13A is hermetically attached to this opening. . An upper bus 5 is hermetically provided in the insulating spacer 13A in a direction perpendicular to the plane of the drawing.
Is connected to the clip into which the tip of the blade of the upper disconnector 23 is inserted.

On both sides of the lower disconnector chamber 21f in the direction perpendicular to the plane of the drawing, a rectangular opening is formed vertically in the above-described mild steel plate on the outer periphery, and this opening has an insulating spacer 13B of the same product as the insulating spacer 13A. Is mounted airtight. The lower bus bar 6 is hermetically provided in the insulating spacer 13B in a direction perpendicular to the plane of the drawing, and the lower bus bar 6 is connected to a clip of the lower disconnector 24 into which the tip of the blade is inserted.

A vacuum circuit breaker 22 is provided above the operation mechanism chamber 21b.
The operation mechanism 14B of the vacuum circuit breaker 22 is partitioned in front of
It is attached to 10A. In front of the upper disconnector 23,
The operation mechanism 14A of the upper disconnector 23 is attached to the partition 10A, and the operation mechanism 14C of the lower disconnector 24 is attached in front of the lower disconnector 24. These operating mechanisms
The operation rods (not shown) of 14A, 14B, and 14C penetrate the partition 10A in an airtight manner.

A current transformer 27 is accommodated in the cable chamber 21g, and a front terminal of the current transformer 27 is connected to a rear end of the insulating spacer 11 penetrating through the partition 10B via the conductor 12B. . The terminal on the rear side of the current transformer 27 is connected to the upper end of the cable head 8 provided through the lower end of the cable chamber 21g via the conductor 12A. The cable head 8 is connected to the floor on which the box body 21 is installed. It is connected to the launched cable 15.

In the metal-closed switchgear configured as described above, sulfur hexafluoride gas as the insulating gas 9 is supplied to the circuit breaker room 21c, the upper disconnector room 21d, the lower disconnector room 21f and the cable room 21g. It is enclosed. In addition, box 21
Is provided with an upper bus bar and a lower bus bar (not shown) connected to the upper bus bar 5 and the lower bus bar 6, and a vacuum (not shown) connected to the upper bus bar and the lower bus bar to supply power to a load. The breaker is housed.

When the upper bus 5 is to be inspected, the operating mechanism 14A opens the blade of the upper disconnector 23 inserted on the side of the upper bus 5 to disconnect the conductor from the conductor 12D connected to the cable 15. Disconnect. Similarly, lower bus 6
Is checked, the operating mechanism 14C opens the blade of the lower disconnector 24 inserted on the side of the lower bus 6, and separates the blade.

[0012]

However, in the metal-closed switchgear configured as described above,
When an interphase short-circuit or grounding accident occurs in the conductor 12D inside the upper disconnector room 21d or the upper disconnector 23, the conductor 12D
Until the restoration work of D and the upper disconnector 23 is completed, the load connected to the lower bus 6 must also be stopped. This is the same when an accident occurs in the conductor 12E or the lower disconnector 24.

In this case, the features of the double-generating linear metal-closed switchgear having improved power supply reliability are impaired. SUMMARY OF THE INVENTION It is an object of the present invention to provide a metal-closed switchgear capable of reducing a power outage time of a load due to an accident of a conductor on one side or a disconnector.

[0014]

SUMMARY OF THE INVENTION The first aspect of the present invention, the upper disconnector chamber and the lower disconnector chambers, one side and the lower disconnector chambers of the upper disconnector accommodated in the upper disconnector chamber blocking one end of which is connected to one side of the housing has been lower disconnector
In a metal-closed switchgear having a circuit breaker chamber for accommodating a circuit breaker chamber , an outer wall of the upper disconnector chamber and an outer wall of the lower disconnector chamber have one side on the other side of the upper disconnector and the lower disconnector. connected to penetrated the cable connection portion connected cable bus to the other side, to the rear of the circuit breaker chamber, said shield
Connect the cable connection to the other end of the
It is characterized by being penetrated .

[0015] According to a second aspect of the invention, the upper disconnector chamber and the lower disconnector chamber and the upper disconnector chambers housed in the upper disconnector on one side and the lower disconnector that said housed in the lower disconnector chamber in the metal closed type switch gear and a breaker chamber for accommodating the connected circuit breaker on one side, the outer wall of the outer wall of the upper disconnector chamber the lower disconnector chamber, one side the upper disconnector and the A gas-insulated connection portion connected to the other side of the lower disconnector and connected to the gas-insulated bus on the other side is provided.

According to the first and second aspects of the present invention, when an accident occurs in the upper disconnector or the upper bus, the upper disconnector is opened and the load is applied to the load via the lower disconnector, the lower bus and the circuit breaker. When power is supplied and an accident occurs in the lower disconnector or the lower bus, the lower disconnector is opened, and power is supplied to the load via the upper disconnector, the upper bus, and the circuit breaker.

[0017]

FIG. 1 is a right side view showing a metal-closed switchgear according to a first embodiment of the present invention, and is a view corresponding to FIG. 7 shown in the prior art. . In FIG. 1, an upper disconnector chamber 1c is formed in an upper portion between a partition 10A and a partition 10B that partition the box 1 back and forth. In the lower part of the upper disconnector room 1c, there is a circuit breaker room 1d below the partition 10C.
Is formed in the lower part of the breaker room 1d.
A lower disconnector chamber 1f is formed in the lower part of the housing.

A cable head chamber 1g is formed at the rear of the circuit breaker chamber 1d.
In the lower part of g, a cable chamber 1h is formed at the rear of the partition 10B. At the front of the partition 10A, there is an operation mechanism room 1b.
Are formed in the same manner as in the prior art.

The upper disconnector 3 is housed in the upper disconnector chamber 1c and fixed to the partition 10A. At the rear of the upper disconnector chamber 1c, an upper bus bar 5 is disposed in a direction perpendicular to the plane of the drawing, and the upper bus bar 5 airtightly passes through insulating spacers 13A provided on both sides of the box body 1 in a direction perpendicular to the plane of the drawing. ing. The upper bus bar 5 is connected by a conductor 12A to a clip 3a provided in front of the upper bus bar 5, and the blade of the upper disconnector 3 is now inserted into the clip 3a. The lower end of the upper disconnector 3 is connected to the upper end of an insulating spacer 11 vertically provided on the partition 10C via a conductor 12B. On the front side of the upper part of the partition 10A, in front of the upper disconnector 3,
The operation mechanism 14A of the upper disconnector 3 is attached.

In the circuit breaker chamber 1d, a vacuum circuit breaker 2 is housed sideways with the movable side facing forward. FIG. 2 shows a partially enlarged detailed view of the vacuum circuit breaker 2. 1 and 2, an annular multi-contact 2d is inserted into a left portion of a movable shaft 2b of a vacuum valve 2a incorporated in the vacuum circuit breaker 2. On the upper part of this multi-contact 2d, Z
The lower end of a conductor 12C formed in a U-shape is connected to this conductor.
The upper end of 12C is an insulating spacer 11 vertically installed on the partition 10C.
Is connected to the lower end.

Similarly, the lower end of the multi-contact 2d is connected to the upper end of a conductor 12D having the same shape as the conductor 12C, and the lower end of the conductor 12D is connected to the upper end of an insulating spacer 11 vertically provided on the partition 10D. ing. The rear end of the conductor 2h connected to the fixed side of the vacuum valve 2a is connected to the front end of an insulating spacer 11 provided through the partition 10B. Partition 10
The operation mechanism 14B of the vacuum circuit breaker 2
The operation bar (not shown) of the operation mechanism 14B is airtightly penetrated through the partition 10A.

The lower disconnector 4 is housed in the lower disconnector chamber 1f and fixed to the partition 10A. Lower disconnector room 1
At the rear of f, a lower bus 6 is disposed in a direction orthogonal to the plane of the paper,
The lower bus bar 6 air-tightly penetrates the insulating spacers 13B provided on both sides of the box 1 in the direction orthogonal to the paper surface. The lower bus 6 is connected to a clip 4a provided in front of the lower bus 6 with a conductor 12F.
The blade of the lower disconnector 4 has now been thrown. The upper end of the lower disconnector 4 is connected to the lower end of an insulating spacer 11 vertically provided on the partition 10D via a conductor 12E. On the front side of the lower part of the partition 10A, an operation mechanism 14C of the lower disconnector 4 is attached in front of the lower disconnector 4.
The operation rod (not shown) of C is airtightly penetrated through the partition 10A.

[0023] A lower end partition is provided in the cable head chamber 1g.
A cable head 8 is vertically penetrated through 10E, a rear end of a conductor 12G is connected to an upper end of the cable head 8, and a front end of the conductor 12G is connected to an insulating spacer penetrating through a partition 10B.
11 Connected to the rear end. In front of the cable head 8, an electric detection insulator 16 is housed vertically, and an upper end of the electric detection insulator 16 is connected to the conductor 12G.

In the cable head room 1h, a cable 15 raised from a pit provided on the floor surface on which the box 1 is installed is stored. A fixed through-type current transformer 7 is loosely fitted.

In the metal-closed switchgear constructed as described above, the circuit breaker chamber 1d, the upper disconnector chamber 1c, the lower disconnector chamber 1f and the cable head chamber 1g are provided with the insulating gas 9 as in the prior art. Sulfur hexafluoride gas is sealed. An unillustrated box adjacent to the box 1 is provided with an unillustrated upper bus and a lower bus connected to the upper bus 5 and the lower bus 6 as in the related art. A vacuum circuit breaker (not shown) that is connected and supplies power to the load is also housed.

When an accident occurs in the upper disconnector 3 or the conductor 12B, the upper disconnector 3 is opened and disconnected from the upper bus 5, and power supply to the load is continued through the lower bus 6. Similarly, when an accident occurs in the lower disconnector 4 or the conductor 12E, the lower disconnector 4 is opened and disconnected from the lower bus 6, and the power supply to the load is continued by the upper bus 5. Permanent restoration of the accident will be performed at night or during periodic inspections when load operation has stopped.

The vacuum circuit breaker 2 shown in FIGS.
Since the structure of the conductors 12C and 12D is vertically symmetrical, the conductors 12C and 12D, the conductors 12B and 12E, and the conductors 12C and 12D.
The same product can be used for A and the conductor 12F. FIG.
When the vacuum circuit breaker 2 is vertically arranged as shown in FIG. 2, the conductor 12G1 on the fixed side of the vacuum circuit breaker 2 connected to the insulating spacer 11 connected to the cable head 8 in FIG. Thus, it is possible to prevent the opening width of the box 1 from increasing due to crossing with the conductor 12C connected to the upper disconnector 3.

FIG. 4 is a right side view showing a metal-closed switchgear according to a second embodiment of the present invention, and is a view corresponding to FIG. In this metal-closed switchgear,
Insulating spacers 13A and 13B provided in a direction orthogonal to the paper surface of the upper disconnector chamber 1c and the lower disconnector chamber 1f shown in FIG.
The upper bus bar 5 penetrating these insulating spacers 13A and 13B
And an example in which the inter-panel connection structure by the lower bus bar 6 is changed.

That is, at the rear of the upper disconnector chamber 1c,
The base 17A is hermetically welded, and the base 17B is also hermetically welded to the rear of the lower disconnector chamber 1f. These bases 17A, 17B are provided with T-shaped insulating bushings 18A1, 18B1, 18C1 and insulating bushings 18A2, 18B2, 18C2 shown in Japanese Patent Publication No. 60-160309, which are vertically staggered. FIG. 4 also shows the rear surface of an adjacent board (not shown).
Similarly, a T-shaped or L-shaped insulating bushing is provided, and the insulating bushings are connected by a high-pressure cross-linked polyethylene cable 19A, respectively.

In this case, the insulating gas 9 in the upper disconnector chamber 1c and the lower disconnector chamber 1f can be filled in the assembly factory, so that the on-site installation period can be shortened.

In FIG. 4, instead of the T-shaped insulating bushings 18A1, 18B1, 18C1, 18A2, 18B2, 18C2, a gas-insulated connection is used to insulate the connection with the adjacent board instead of the high-pressure cross-linked polyethylene cable 19A. The bus 19 </ b> B may be the invention described in claim 5.

FIG. 5 is a right side view showing a third embodiment of the metal-closed switchgear according to the present invention, and corresponds to FIGS. In FIG. 5, the insulating spacers 13A provided on both sides of the upper disconnector chamber 1c in the direction orthogonal to the plane of the paper are:
In FIG. 1, it is provided vertically at the rear, whereas in FIG. 5, it is provided horizontally at the top. Similarly, the insulating spacer 13B provided in the lower disconnector chamber 1f is provided laterally below. In this case, although the height of the box 1 increases, the depth can be reduced, so that it can be selected according to the restriction of the installation location.

FIG. 6 is a right side view showing a fourth embodiment of the metal-closed switchgear of the present invention.
6 is a diagram corresponding to FIG. 6, the mounting locations of the insulating bushings 18A1, 18B1, 18C1 shown in FIG. 4 are changed from the rear surface of the upper disconnector chamber 1c to the upper surface, and from the rear surface of the lower disconnector room 1f to the lower surface.

In this case, the height of the box 1 is increased as compared with the metal-closed switch gear shown in FIG.
Since the depth can be reduced as compared with the metal-closed switchgear shown in the above, the depth can be selected depending on the installation location. Therefore, the on-site installation period can be shortened. Again, in this case,
4, the insulating bushings 18A1, 18B1, 18C1
Alternatively, a gas-insulated connection may be used, and a gas-insulated bus may be used instead of a cable.

In the above embodiment, the upper bus 5
And the lower bus 6 is used as a bus connecting to the feeder breaker on the load side, and the cable 15 is connected to the power supply side. However, the upper bus 5 and the lower bus 6 are used as the power supply,
May be the load side.

[0036]

Effects of the Invention According to the invention described in claim 1, is housed the upper disconnector chamber and the lower disconnector chambers, one side and the lower disconnector chambers of the upper disconnector accommodated in the upper disconnector chamber to house the circuit breaker having one end connected to one side of the lower disconnector was
In the metal closed type switch gear and a breaker chamber that, the outer wall of the outer wall of the upper disconnector chamber the lower disconnector chamber, one side is connected to the other side of the upper disconnector and the lower disconnector, On the other side, a cable connection part to which a cable bus is connected is provided through, and another part of the circuit breaker is provided at the rear of the circuit breaker room.
When an accident occurs at the upper disconnector or upper bus by penetrating the cable connecting part that connects the cable bus at the end , the upper disconnect is opened, and the lower disconnector, the lower bus and the circuit breaker are opened. When power is supplied to the load and an accident occurs in the lower disconnector or lower bus, the lower disconnector can be opened to supply power to the load via the upper disconnector and upper bus and the circuit breaker, It is possible to obtain a metal-closed switchgear that can reduce the power outage time of a load due to an accident of one of the conductors or the disconnector.

Further, according to the second aspect of the present invention,
Be housed and an upper disconnector chamber and the lower disconnector chamber, the upper disconnector chambers housed in the upper disconnector on one side and connected breaker on one side of the lower disconnector that are housed in the lower disconnector chamber
In the metal closed type switch gear and a breaker chamber that, the outer wall of the outer wall of the upper disconnector chamber the lower disconnector chamber, one side is connected to the other side of the upper disconnector and the lower disconnector, When an accident occurs at the upper disconnector or upper bus, the upper disconnector is opened and the lower disconnector and the lower bus are disconnected from each other by penetrating the gas-insulated connection to which the gas-insulated bus is connected to the other side. vessels supplying power to the load via the, when an accident occurs in the lower disconnector and the lower busbars to supply power to a load through the upper disconnector and the upper busbar breaker by opening the lower disconnector Thus, it is possible to obtain a metal-closed switchgear capable of reducing a power outage time of a load due to an accident of a conductor on one side or a disconnector.

[Brief description of the drawings]

FIG. 1 is a right side view showing a first embodiment of a metal-closed switchgear of the present invention.

FIG. 2 is a partially enlarged detailed view of FIG. 1;

FIG. 3 is a partial detailed view illustrating the operation of the metal-closed switchgear according to the first embodiment of the present invention.

FIG. 4 is a right side view showing a second embodiment of the metal-closed switchgear of the present invention.

FIG. 5 is a right side view showing a third embodiment of the metal-closed switchgear of the present invention.

FIG. 6 is a right side view showing a fourth embodiment of the metal-closed switchgear of the present invention.

FIG. 7 is a right side view showing an example of a conventional metal-closed switchgear.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Box body, 1b ... Operation mechanism room, 1c ... Upper disconnector room, 1
d: circuit breaker room, 1f: lower disconnector room, 2: vacuum circuit breaker,
3 ... upper disconnector, 4 ... lower disconnector, 5 ... upper bus, 6 ...
Lower busbar, 7: current transformer, 8: cable head, 9: insulating gas, 10A, 10B, 10C, 10D, 10E: partition, 11, 13
A, 13B ... insulating spacers, 12A, 12B, 12C, 12D, 12
E, 12F, 12G: conductor, 14A, 14B, 14C: operation mechanism,
15 ... Cable, 16 ... Inspection insulator.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitaka Honma 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu Plant (72) Inventor Toshiaki Muraoka 1-Toshiba-cho, Fuchu-shi, Tokyo Toshiba Fuchu Plant (72) Inventor Masahiko Maeda 1-1-1, Shibaura, Minato-ku, Tokyo Inside the Toshiba Corporation head office (72) Inventor Katsumi Goto 1-1-1, Shibaura, Minato-ku, Tokyo Office of Toshiba Corporation In-house (72) Inventor Yasufumi Nagata 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (56) References JP-A-62-107610 (JP, A) JP-A-58-157305 ( JP, A) JP-A-4-344107 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 13/02-13/075

Claims (2)

(57) [Claims] And 1. A top disconnector chamber and the lower disconnector chamber, one end connected to one side of the upper disconnector chambers housed in the upper disconnector on one side and the lower disconnector that are housed in the lower disconnector chamber in the metal closed type switch gear and a breaker chamber for accommodating breaker has, other of said outer wall of the outer wall of the upper disconnector chamber the lower disconnector chamber, one side the upper disconnector and the lower disconnector Side, and a cable connection part to which the cable bus is connected to the other side, penetrates the rear part of the breaker room.
A cable for connecting a cable busbar to the other end of the circuit breaker.
A metal-closed switchgear characterized in that a metal connection portion is penetrated . 2. A top disconnector chamber and the lower disconnector chamber, which is connected to one side of the lower disconnector housed one side and the lower disconnector chambers of the upper disconnector accommodated in the upper disconnector chamber
In the metal closed type switch gear and a breaker chamber for accommodating a circuit breaker, the outer wall of the outer wall of the upper disconnector chamber the lower disconnector chamber, one side the upper disconnector and the other side of the lower disconnector A metal-closed switchgear, characterized in that a gas-insulated connection portion is connected to the other side and a gas-insulated bus is connected to the other side.