JP2001061206A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a switchgear which can be constituted in a compact state as a whole and can be inspected easily from the front or above the switchgear. SOLUTION: A switchgear is constituted in such a way that a cable chamber 4 is arranged in the rear of upper and lower breaker chambers 2, and a bus chamber 3 is arranged astride the upper and lower brake chambers 2 in a cable chamber 4. In the bus chamber 3, the lower terminal of an upper breaker 5 and the upper terminal of a lower breaker 5 are connected to each other through a first connecting conductor 15, and three-phase buses 8 are arranged in the rear of the conductor 15. The buses 8 are connected to the first connecting conductor 15 one to one respectively through second connecting conductors 16 and CTs 17 are arranged in the upper and lower parts of the bus chamber 3. Upper and lower cable connecting conductors 18 are led straight backwardly from the upper terminal of the upper breaker 5 and the lower terminal of the lower breaker 5 to the vicinity of the rear end of the bus chamber 3 and connected to cables 20 and 21 rising from the lower part. In addition, inspection covers 22, 23, and 24 are respectively provided on the top face of the switchgear, rear face of the bus chamber 3, and the front face of the cable chamber 17 below the breaker chamber 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear used in power receiving equipment.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a side sectional view showing a conventional switchgear disclosed in Japanese Patent Application Laid-Open Publication No. HEI 10-115,036. In the figure, 1 is a switchgear box, 1a is a door mounted on the front of the box 1, 2 is a circuit breaker room arranged in two stages on the front of the box 2, 3 is the circuit breaker A busbar room arranged so as to straddle the two-stage circuit breaker room 2 at the rear of the room 2;
Reference numeral 4 denotes a cable chamber disposed above and below the busbar chamber 3, reference numeral 6 denotes a busbar bushing having a built-in disconnection part for contacting / separating the circuit breaker 5, and reference numeral 7 denotes a disconnection part for contacting / separating the circuit breaker 5 therein. , CT on the cable side bushing, 8 a bus bar, 9 a an upper cable connected to the bushing 7, 9 b a lower cable connected to the bushing 7, 10 a front cable room front. This is an inspection cover that closes the inspection port. FIG.
5 is a plan sectional view of the upper circuit breaker room 2 and the cable room 4 as viewed from below. In the figure, 13 is a control equipment room arranged on the side of the circuit breaker room 2, 4 is a cable room,
The communication with the cable room 4 shown in FIG.
3, a high-voltage terminal 14 supported by an insulating support 15 is arranged. The high-voltage terminal 14 connects the cable 9a or 9b shown in FIG. 4 to a load-side cable (not shown) that rises from the lower part of the switchgear.

[0003]

In the above-mentioned conventional switchgear, the cable chamber 4 is arranged from the rear to the side of the circuit breaker chamber 2, and the load side is located at the side of the circuit breaker chamber 2. The connection with the cable has a problem that the installation space of the switchgear becomes large. Also, since the small inspection cover 11 provided in the interior of the circuit breaker room 2 is removed from the inside of the bus room 3, the inspection opening is narrow and it is very difficult to perform the inspection inside the bus room.

The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to provide a switchgear which can be made compact as a whole. Also,
A second object is to provide a switchgear capable of easily performing inspection from the front or upper part of the switchgear.

[0005]

In a switchgear according to the present invention, a cable room is arranged behind a circuit breaker room arranged in two stages, upper and lower, and straddles the upper and lower circuit breaker room in the cable room. A bus room is arranged, a lower terminal of the upper circuit breaker and an upper terminal of the lower circuit breaker are connected by a first connection conductor in the bus room, and a three-phase bus is formed in a cross section behind the first connection conductor. The three-phase conductors are arranged vertically and parallel to each other in the longitudinal direction, extending in the width direction of the switchgear, and each busbar and each first connection conductor are separated by a second connection conductor. Connected one to one, CTs were arranged at the upper and lower parts of the bus room, and the upper cable connecting conductor was led out straight from the upper terminal of the upper circuit breaker via CT to the vicinity of the rear end of the bus room, From the lower terminal of the lower circuit breaker straight forward via CT and forward Deriving a lower cable connecting conductor to the vicinity of the rear end of the busbar compartment, it rises from below Ke - which are connected respectively to the upper cable connection conductor and the lower cable connecting conductor at Bull.

The connection between the upper cable connecting conductor and the cable is formed by bending the end of the upper cable connecting conductor obliquely downward.

A chamfered slope is formed by removing the upper rear corner of the busbar chamber, and the connection between the upper cable connection conductor and the cable is arranged above the slope.

A CT is mounted on the upper and lower surfaces of a bus room.

A cable room is arranged behind the circuit breaker rooms arranged in two stages, and a bus room extending over the upper and lower circuit breaker rooms is arranged in the cable room, and an upper circuit breaker is provided in the bus room. The lower terminal and the upper terminal of the lower circuit breaker are connected by a first connection conductor, and a three-phase bus is formed at the rear of the first connection conductor with the longitudinal direction of the cross section as the up-down direction and the three-phase each phase conductor up and down. The switch gears are arranged so as to extend in the width direction of the switch gear, and each bus bar and each first connection conductor are connected one by one with a second connection conductor.
And CTs are placed at the top and bottom of the bus room, and the upper cable connection conductor is led out straight from the upper terminal of the upper circuit breaker via CT to the rear end of the bus room, and the lower circuit is disconnected. The lower cable connecting conductor is led out straight from the lower terminal of the vessel via the CT to the vicinity of the rear end of the busbar room, and the upper cable connecting conductor and the lower cable are connected by cables rising from below. Inspection covers are respectively provided on the upper surface of the switchgear, the rear surface of the busbar room, and the front surface of the cable room below the circuit breaker room.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows a switchgear according to a first embodiment of the present invention, in which 1 is a switchgear box, 1a is a door, 2 is a circuit breaker room arranged in two upper and lower stages, and 3 is arranged in a vertical direction. Further, a bus room 4 arranged so as to straddle the circuit breaker room 2, a cable room 4 arranged behind the circuit breaker room 2 so as to enclose the bus room 3, and a drawer 5 arranged in the circuit breaker room 2 A breaker 6 of a type is arranged in the breaker room 2, a bushing bushing arranged in contact with and separating from the circuit breaker 5, 7 is a cable side bushing arranged in the breaker room 2 and arranged in contact with and separate from the circuit breaker 5, 15 Is a connection conductor (first connection conductor) bent in a U-shape to connect the upper and lower busbar-side bushings 6, and 8 is a three-phase busbar having a rectangular cross section. And extends in the thickness direction of the paper surface of FIG.

Reference numeral 16 denotes a U-shaped connection conductor (second connection conductor) for connecting the bus bar 8 and the connection conductor 15 one-to-one with each phase. The upper and lower corners of the rear end of the bus bar 3 form corners and inclined planes 45a, that is, chamfers 3a and 3b. Reference numeral 17 denotes a CT integrally formed with the three phases, which is mounted on the upper and lower surfaces of the busbar chamber 3. In this CT, a CT corresponding to each phase and a zero-phase CT that detects all three phases collectively are integrated and integrated. Reference numeral 18 denotes an upper connection conductor, which extends straight from the cable-side bushing 7 of the upper circuit breaker room 2 through the CT 17 toward the rear of the switchgear, and extends obliquely downward near the upper portion of the chamfered portion 3a. To form a connecting portion 18a. Reference numeral 19 denotes a lower connection conductor, which extends straight from the cable-side bushing 7 of the lower circuit breaker room 2 through the CT 17 toward the rear of the switchgear, and extends horizontally.
In the vicinity of the lower portion of b, the connecting portion 19 is bent obliquely downward.
a.

Reference numeral 20 denotes a cable which is connected to the load side and whose end is raised from the lower portion of the switchgear, and which is connected to the connection portion 18a via a terminal 20a. Reference numeral 21 denotes a cable connected to the load side and having an end raised from the lower portion of the switchgear.
It is connected to the connection part 18b via 1a. Reference numeral 22 denotes an inspection cover provided on the upper part of the box 1, and by removing the inspection cover, the inside of the cable chamber 4 can be inspected from above. Reference numeral 23 denotes an inspection cover provided on the front surface of the cable room 4 below the lower circuit breaker room 2. 24
Is an inspection cover provided on the rear surface of the bus room 3, and by removing the cover, the inside of the bus room 3 can be inspected.

FIG. 2 is a rear view of a partial cross-section taken along the line AA in FIG. 1. Numeral 8 denotes a three-phase bus which is arranged three above and below and extends in the lateral direction of the switchgear, not shown. Are slightly shorter than the width of the switchgear box 1, and are connected to adjacent switchgears by connecting pieces (not shown). Reference numeral 15 denotes a connection conductor (first connection conductor) for connecting the busbar bushings 6 of the upper circuit breaker room 2 and the lower circuit breaker room 2 to each other;
Means that the bus 4 of each phase and the connecting conductor 15 are
It is a connection conductor (2nd connection dynamics) connected to a pair. 1
Reference numeral 7 denotes a CT integrally formed with the three phases, which is mounted in close contact with the upper and lower surfaces of the busbar chamber 3. 18 is an upper connecting conductor and C
It is arranged through T17. Reference numeral 19 denotes a lower connection conductor which is arranged so as to penetrate the CT 17.

FIG. 3 is a partial cross-sectional plan view taken along the line BB of FIG.
Reference numeral 8 denotes an upper connecting conductor penetrating the CT 17 and three phases are arranged in parallel, 18a denotes a connecting portion formed by bending the tip of the upper connecting conductor 17 obliquely downward, 20 denotes a cable rising from below, Reference numeral 20a denotes a terminal mounted on the end of the cable 20, which is connected to the connection portion 18a. Reference numeral 24 denotes an inspection cover attached to an inspection port (not shown) on the rear surface of the bus room.

In the above description, the three-phase bus bars 8 are arranged with the longitudinal direction of the cross section directed toward the upper limit direction. 3 can be reduced in depth dimension.
Further, by forming a chamfered portion 3a at the upper corner of the rear surface of the busbar chamber 3, the connection position between the connection conductor 18 and the cable 20 is shifted to the front side from the position where the cable is straightly raised. Therefore, the depth dimension of the switchgear can be reduced. If the cable 20 is to be connected in a straight up position, the size of the terminal 20a is larger than that of the cable portion, so that the rear wall of the box is further provided to secure a necessary insulation distance around the terminal 20a. It is necessary to displace to the rear side, and as a result, the depth dimension of the box 1 increases.

Further, since the CT 17 is penetrated and its conductor penetrating position is at the same level as the height of the conductor lead-out portion of the cable side bushing 7, the upper connecting conductor 18 and the lower connecting conductor 19 can be drawn straight out horizontally. In addition, the conductor parts can be easily manufactured, for example, the bending of the conductor is eliminated. Also,
The height of the top of the CT 17 can be minimized by adjusting the conductor penetrating portion of the CT 17 to the drawing height of the upper connection conductor 18, and the height of the cable chamber 4 can be reduced. Further, by directly mounting the CT 17 on the upper and lower surfaces of the bus bar 3, the supporting parts of the CT 17 become unnecessary, so that the entire mounting height can be kept low and the number of parts can be reduced, for example, because the supporting becomes unnecessary. .

The upper connecting conductor 18 and the lower connecting conductor 1
9 are bent obliquely downward to form connecting portions 18a and 19a.
Since the cables 20 and 21 are not bent excessively and an appropriate insulation distance can be secured from the rear surface of the box 1 to the connecting portions 18a and 19a, the depth of the box 1 can be reduced. Can be shortened.

The rising height of the cable 21 (height from the floor surface to the upper end of the terminal 21a) depends on the diameter of the cable.
If it is about 0 cm, it can be installed. In this case, as shown in FIG. 1, the lower circuit breaker chamber 2 is arranged at a predetermined height so that the lower connection conductor 19 is led out at this level, thereby connecting the lower connection conductor 19 and the cable. The main circuit path formed by 21 is substantially L-shaped, so that the layout of the main circuit can be greatly simplified. With such a configuration, an access space for inspection can be secured below the circuit breaker room 2, so that the cable room 4 can be secured.
Front maintenance becomes possible.

Further, a passage space for the cable 20 is provided at a rear portion of the busbar room 3, and an inspection cover is provided in the passage space.
24, the inspection cover 23 is removed, the inspection cover 23 is removed, and the cable 20 passes through the cable room 4 when the inspection of the busbar room 3 located behind the circuit breaker room 2 is performed. And maintenance of the front face of the switchgear becomes possible.

[0020]

Since the present invention is configured as described above, it has the following effects.

A cable room is arranged behind the circuit breaker rooms arranged in two upper and lower stages, and a bus room extending over the upper and lower circuit breaker rooms is arranged in the cable room, and an upper circuit breaker is provided in the bus room. The lower terminal and the upper terminal of the lower circuit breaker are connected by a first connection conductor, and a three-phase bus is formed at the rear of the first connection conductor with the longitudinal direction of the cross section as the up-down direction and the three-phase respective phase conductors vertically. The switch gears are arranged so as to extend in the width direction of the switch gear, and each bus bar and each first connection conductor are connected one by one with a second connection conductor.
And CTs are placed at the top and bottom of the bus room, and the upper cable connection conductor is led out straight from the upper terminal of the upper circuit breaker via CT to the rear end of the bus room, and the lower circuit is disconnected. The lower cable connecting conductor is led out straight from the lower terminal of the vessel via the CT to the vicinity of the rear end of the busbar room, and the upper cable connecting conductor and the lower cable are connected by cables rising from below. Since the switchgears are respectively connected to the connection conductors, the switchgear can be made compact.

Also, since the connecting portion between the upper cable connecting conductor and the cable is formed by bending the end of the upper cable connecting conductor obliquely downward, the cable connecting portion is separated from the rear surface of the cable chamber. And the depth of the cable room can be reduced.

Further, a chamfered slope is formed by removing the upper rear corner of the busbar chamber, and the connection between the upper cable connection conductor and the cable is arranged above the slope.
The cable connecting portion can be displaced toward the busbar room, and the depth of the cable room can be reduced.

Further, since the CT is mounted on the upper and lower surfaces of the bus chamber, no support member for the CT is required, and the height of the cable chamber can be reduced.

Further, a cable room is arranged behind the circuit breaker rooms arranged in the upper and lower stages, and a bus room extending over the upper and lower circuit breaker rooms is arranged in the cable room, and an upper stage is formed in the bus room. The lower terminal of the circuit breaker and the upper terminal of the lower circuit breaker are connected by a first connection conductor. And parallel to and extend in the width direction of the switchgear,
Each bus and each first connection conductor are connected one-to-one with second connection conductors, and CTs are arranged at the upper and lower portions of the bus chamber, and are straightened from the upper terminal of the upper circuit breaker via the CT. The upper cable connection conductor is led out rearward to near the rear end of the bus room, and the lower cable connection conductor is directed straight rearward from the lower terminal of the lower circuit breaker via CT to near the rear end of the bus room. It is connected to the upper cable connecting conductor and the lower cable connecting conductor with cables rising from the lower side, respectively, and is connected to the upper surface of the switchgear, the rear surface of the busbar room, and the front surface of the cable room below the breaker room. Inspection cover for each
Is provided, it is possible to obtain a switchgear capable of easily performing an inspection from the front or the top.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a switchgear according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional rear view as viewed in a direction AA in FIG. 1;

FIG. 3 is a partial cross-sectional plan view as seen in the BB direction of FIG. 1;

FIG. 4 is a side sectional view showing a conventional switchgear.

FIG. 5 is a sectional plan view between the circuit breaker room and the cable room in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Circuit breaker room 3 Bus bar room 3a Chamfer part 4 Cable room 5 Circuit breaker 6 Bus bar side bushing 7 Cable side bushing 8 Bus bar 15 Connection conductor 16 Connection conductor 17 CT 18 Upper connection conductor 18a Connection part 19 Lower connection conductor 19a Connection part 20 cable 20a terminal 21 cable 21a terminal 22 inspection cover 23 inspection cover 24 inspection cover

Claims (5)

[Claims] 1. A circuit breaker room arranged in two upper and lower stages, a cable room arranged behind each of the circuit breaker rooms, a bus room arranged in the cable room over the upper and lower circuit breaker rooms, A first connection conductor connecting the lower terminal of the upper circuit breaker and the upper terminal of the lower circuit breaker in the busbar chamber; And three-phase buses extending vertically and parallel to each other in the width direction of the switchgear, and a second connection for connecting each of the buses and each of the first connection conductors on a one-to-one basis. A conductor, a CT disposed at an upper part and a lower part of the bus chamber, and an upper cable connection conductor led straight from the upper terminal of the upper circuit breaker to the rear end of the bus chamber straight toward the rear via the CT. And C from the lower terminal of the lower circuit breaker.
A lower cable connecting conductor that is led straight back to near the rear end of the busbar via T, and a cable that rises from below and is connected to the upper cable connecting conductor and the lower cable connecting conductor, respectively. A switchgear comprising: 2. The switchgear according to claim 1, wherein the connecting portion between the upper cable connecting conductor and the cable is formed by bending an end of the upper cable connecting conductor obliquely downward. 3. A chamfered slope is formed by taking a corner at an upper rear portion of the busbar chamber, and a connection portion between the upper cable connection conductor and the cable is disposed above the slope. Item 3. The switchgear according to Item 2. 4. The switchgear according to claim 1, wherein the CT is mounted on an upper surface and a lower surface of the busbar chamber. 5. A circuit breaker room arranged in two upper and lower stages, a cable room arranged behind each of the circuit breaker rooms and having an inspection port below the circuit breaker room, and the upper and lower circuit breakers are provided in the cable room. A first bus connecting a lower terminal of the upper circuit breaker and an upper terminal of the lower circuit breaker in the bus chamber;
A three-phase connection conductor extending in the width direction of the switchgear vertically and in parallel with the longitudinal direction of the cross section behind the first connection conductor. A bus, and a distance between each of the buses and each of the first connection conductors of 1;
A second connection conductor connected to the pair, a CT disposed at an upper portion and a lower portion of the bus bar, and a rear end of the bus bar straight rearward from an upper terminal of the upper circuit breaker via the CT; An upper cable connecting conductor led out to the vicinity, a lower cable connecting conductor led straight from the lower terminal of the lower circuit breaker via the CT to the rear end near the rear end of the busbar room, A cable connected to the upper cable connecting conductor and the lower cable connecting conductor, respectively, and an inspection cover provided on the upper surface of the switchgear, the rear surface of the busbar room, and the front surface of the cable room below the circuit breaker room. A switchgear comprising: