DESCRIPTION
Title of Invention
SWITCHGEAR AND SWITCHGEAR ASSEMBLING METHOD
Technical Field
[OOOl]
The present invention relates to a switchgear and a
switchgear assembling method, and more particularly, to a
10 switchgear with improved assembly workability upon
production and on-site assembling.
Background Art
[0002]
In recent years, as a countermeasure against the
15 global warming issue, a high voltage switchgear without
sulfur hexafluoride gas (SF6 gas) attracts attention. There
are various types of insulation methods such as compressed
air insulation in which a tank is filled with high-pressure
dry air, vacuum insulation mainly using vacuum as insulating
20 medium, and solid insulation in which epoxy resin is filled
around a high voltage member.
[0003]
Generally, the structure of the switchgear is divided
into three types: a feeder panel for feed to a load; a bus
25 section panel to separate a bus; and a bus tie panel to
connect two buses. Each section is of single-bus type or
double-bus type in correspondence with the number of buses.
Figure 11 shows a one-line wiring diagram of a double-bus
type switchgear. Note that it is considered that an
5 incoming panel for power receiving has the same main
circuitry as that of the feeder panel.
[0004]
The main circuit parts in these switchgears
respectively have a combination of a breaker, a disconnector,
10 a grounding switch and a bus. More particularly, a
circuitry described in ,for example, Patent Literature 1 is
known. In Patent Literature 1, various switchgear
circuitries are realized by combining a solid insulation
type breaker, a disconnector and a grounding switch.
15 Citation List
Patent Literature
[0005]
Patent Literature 1: Japanese Patent Application
Laid-Open No. 2007-306791
20 Summary of Invention
Technical Problem
[0006]
As described above, as plural switches such as a
breaker, a disconnector and a grounding switch each are
25 connected and arranged inside the switchgear, improvement in
on-site assembly workability is required. Especially, since
buses and cables are built when the respective switchgears
have been set into a row board (plural switchgears are
arrayed) status, the working space is limited, and
5 improvement in on-site workability is required. Further, in
the case of a double-bus type switchgear, the number of
switches is increased for connection with two pairs of buses,
and the working space is further limited.
[0007]
10 Therefore, the present invention has an object to
provide a switchgear capable of improving assembly
workability and a switchgear assembling method.
Solution to Problem
[0008]
15 To solve the above problems, a switchgear according
to the present invention comprises: a plurality of switch
units having a stationary electrode, and a movable electrode
opposite to the stationary electrode and driven in a
horizontal direction into contact with or opened from the
20 stationary electrode; a plurality of operation mechanisms
that operate the movable electrode in the plurality of
switch units; a bus connection member, provided in the
switch unit, and connected to a bus; and a casing
accommodating all the bus connection member, the plurality
25 of switch units and the plurality of operation mechanisms,
wherein the plurality of switch units are provided in a
height direction, and wherein the plurality of operation
mechanisms are provided on a front surface side or a rear
surface side of the casing, further wherein the plurality of
5 bus connection members are provided on the other side of the
casing.
Further, an assembling method for a switchgear,
according to the present invention, having: a plurality of
10 switch units having a stationary electrode, and a movable
electrode opposite to the stationary electrode and driven in
a horizontal direction into contact with or opened from the
stationary electrode; and a plurality of operation
mechanisms that operate the movable electrode in the
15 plurality of switch units, comprises: a step of fixing the
switch unit with respect to a base so as to set a driving
direction of the movable electrode as a height direction; a
step of, after fixing of the switch unit, setting the
movable electrode upright so as to set the driving direction
20 to the horizontal direction; and a step of, after the above
step, connecting the operation mechanism to the plurality of
switch units.
Advantageous Effects of Invention
[OOlO]
According to the present invention, it is possible to
provide a switchgear capable of improving assembly
workability and a switchgear assembling method.
Brief Description of Drawings
5 [OOll]
Figure 1 is a sectional side elevation of a
switchgear in Embodiment 1;
Figure 2 is a rear elevation of the switchgear in
Embodiment 1;
10 Figure 3 is a sectional side elevation of a breaker
unit in the embodiment;
Figure 4 is a sectional side elevation of a
disconnector unit in the embodiment;
Figure 5 is an explanatory diagram of a switchgear
15 assembling method in the embodiment;
Figure 6 is another explanatory diagram of the
switchgear assembling method in the embodiment;
Figure 7 is an explanatory diagram of bus connection
upon on site installation in the embodiment;
20 Figure 8 is a sectional side elevation of the
switchgear in Embodiment 2;
Figure 9 is a sectional side elevation of the
switchgear in Embodiment 3;
Figure 10 is a sectional side elevation of the
25 switchgear in Embodiment 4; and
Figure 11 is a wiring diagram explaining a circuitry
of the switchgear.
Description of Embodiments
[OOlZ]
5 Hereinbelow, preferred embodiments of the present
invention will be described using the drawings. Note that
the following description merely shows an example of
implementation, but is not intended to limit the subject
matter of the invention to the following particular aspects
10 It goes without saying that it is possible to modify the
invention in other various forms than the following
embodiments.

[0013]
Embodiment 1 will be described using Figure 1 to
Figure 7. Note that in the present embodiment, a double-bus
type switchgear 1 will be described. Figure 1 corresponds
to an incoming panel or a feeder panel in the one-line
wiring diagram shown in Figure 11. The switchgear
20 accommodates various devices described below in a casing.
[0014]
The switch is formed by assembling plural switch
units. More particularly, it is formed with one breaker
unit 2 provided in a bottom part and three disconnector
25 units 3, 4 and 5 arrayed on the upper side in a height
direction of the breaker unit 3. The respective units are
interconnected with two types of connecting members 6 and 7.
The connecting member 6 is a member to connect disconnector
units. The center disconnector unit 4 is used as a
5 grounding switch to be described below. As the interval
between the disconnector units is narrowed, the length of
the connecting member 6 is short in comparison with the
connecting member 7. The connecting members 6 and 7 are
formed by covering the periphery of a conductor with
10 insulating material such as resin. A bushing 10 is
connected to the disconnector unit 4, and the bushing 10 is
grounded E (earthed). That is, the disconnector unit 4
functions as a grounding switch. Note that in a normal
operation status, the bushing 10 is grounded as described
15 above. However, it is separated from the earth in
accordance with necessity, and is available as a withstandvoltage
test terminal for a cable 11.
[0015]
A first bus A is connected to the disconnector unit 3,
20 and a second bus B is connected to the disconnector unit 5,
respectively. Two types of connecting members 13 and 14 are
used for connection between the respective units and the
buses. The connecting member 13 has a linear shape, and the
connecting member 14 is curved so as to avoid spatial
25 interference by phase. In the present embodiment, with
respect to a V phase bus having an intermediate height, the
remaining U phase and W phase buses are provided above and
below in symmetrical positions with respect to the V phase
bus. By aligning the positions of the V phase (the three
5 phases are referred to as U phase, V phase and W phase) of
the disconnector units 3 and 5 and the V phase of the buses
A and B in the height direction, and by providing the U
phase and W phase in symmetrical positions with respect to
the V phase, only one type of connecting member 14 is curved.
10 [0016]
The cable 11 to supply electric power to the load is
connected to the stationary side of the breaker unit 2 via a
cable head 12. In the present embodiment, an example where
two cables are connected so as to ensure a current capacity
15 is shown. Of course, the number of cables is not limited to
two. It is possible to change the number of cables in
correspondence with installation environment.
[0017]
As described above, the incoming panel and the feeder
20 panel are formed by mutually connecting the breaker unit 2,
the disconnector units 3, 4 and 5, the cable 11 and the
buses A and B.
[OOlS]
The breaker unit 2 and the disconnector units 3, 4
25 and 5 are provided such that their movable parts are driven
in a horizontal direction with respect to the switchgear 1,
and the units are arrayed in a height direction of the
switchgear 1. An operation mechanism to drive the movable
parts, i.e., a breaker unit operation mechanism 8 and a
5 disconnector unit operation mechanism 9 are provided on the
front side of the switchgear 1 so as to be accessible for
the operator. Note that an openable/closable cover 100 is
attached to the front side.
[0019]
10 Next, the breaker unit 2 will be described using
Figure 3. As the method of connection between the breaker
unit 2 and the connecting member 7 and the cable head 12 is
common to the method of connection between the connecting
member 6 and the respective switch units among the switch
15 units, and the method of connection between the connecting
member 13 and the respective switch units among the
respective switch units and the buses, these methods will
also be described using Figure 3. Note that reference
numeral 123 denotes a cover for insulation used when the
20 switch units of the breaker unit 2 and the disconnector
units 3, 4 and 5 are positioned at the end of connected
units. Figure 3 shows the breaker unit. The figure does
not show a case where the breaker unit 2 is provided in the
position of the breaker unit 2 in Figure 1 but a case where
25 it is provided in a position where the connecting member is
not connected to the upper side of the unit as in the case
of, for example, the disconnector unit 3 in Figure 1.
[0020]
The breaker unit 2 has a stationary electrode 15 and
5 a movable electrode 16 opposite to the stationary electrode
15 and horizontally driven to contact with or opened from
the stationary electrode 15 in a vacuum valve having vacuumsealed
inside. The stationary electrode 15 is connected to
a stationary conductor 30 extending in the horizontal
10 direction on the rear surface side. The movable electrode
16 is connected to a movable conductor 26 extending in the
horizontal direction on the front surface side. The
stationary conductor 30 of the vacuum valve 21 is connected
to the bushing 10 for connection to the cable head 12. The
15 bushing 10 is formed with a porcelain tube 70 and a central
conductor 71. The central conductor 71 is provided with a
band contact 72 for electrical continuity with the
stationary conductor 30. Note that in the present
embodiment, as described later, since the breaker unit is
20 provided only in a connection part with the cable, the
breaker unit is connected to the bushing 10. However, it
may be connected with the connecting member 13. The
structure of the present embodiment has compatibility to
easily change the connection to the bushing 10 and the
25 connection with the connecting member 13 in correspondence
with installation environment. That is, the breaker unit 2
and the disconnector units 3, 4 and 5 have the structure of
the connecting member in common.
[0021]
5 The movable conductor 26 has a bellows between the
movable conductor and a vacuum vessel, to maintain the
hermeticity in the vacuum vessel while allow movability of
the movable conductor 26. The movable conductor 26 extends
from the inside of the vacuum vessel to the outside of the
10 vacuum vessel, and fixes a member 27 outside the vacuum
vessel. A band contact 28 for collecting with respect to
the conductors 24 and 25 is provided on the periphery of the
member 27. Further, an insulating rod 29 is connected to a
front side end of the movable conductor 26, and the
15 insulating rod 29 itself is driven in the horizontal
direction with the breaker unit operation mechanism 8. The
movable conductor 26 and .the movable electrode 16 are also
driven in the horizontal direction in accordance with the
movement of the insulating rod 29 in the horizontal
20 direction.
[0022]
In the breaker unit 2, resin 22 such as epoxy for
insulation is molded around the vacuum valve 21, and its
external surface is covered with conductive coating material
25 23. The conductive coating material 23 has the ground
potential to ensure contact safety for people with respect
to this part.
[0023]
The two conductors 24 and 25 are provided in upper
5 and lower positions of a side surface (height direction) of
the breaker unit 2. The conductor (the conductor 25 in
Figure 3) is engaged with the connecting member 6 to ensure
electrical continuity between the units. The connecting
member 6 has a central conductor 61 and a flange 63 of
10 insulating material supporting the central conductor 61.
The central conductor 61 is provided with the band contact
62 for slide electrical continuity with a conductor in
contact with it (the conductor 25 in Figure 3). Note that
in Figure 3, the conductor 25 is engaged with the connecting
15 member 6, however, it may be arranged such that the
conductor 24 is engaged with the connecting member 6 in
correspondence with installation environment, or the
conductor 24 and the conductor 25 are engaged with the
separate connecting member 6 or the connecting members 6 and
20 7, in place of the insulating cover 123. In the structure
shown in Figure 1, the connecting member 7 is actually
connected with the connector 24, and the connecting member
is not connected to the conductor 25 side but the insulating
cover 123 is provided. Note that the exterior surface of
25 the flange 63 of insulating material is also covered with
conductive coating material 64 for grounding, to ensure the
ground safety.
[0024]
When the bushing 10, the connecting members 6 and 7,
5 the connecting members 13 and 14 and the insulating cover
123 are fixed to the switch unit (the breaker unit 2 or the
disconnector unit), a rubber ring 73 is held between the
switch unit and the bushing 10, the connecting members 6 and
7, and the insulating cover 123. The rubber ring 73 is used
10 to ensure insulation between the central high voltage member
and the peripheral earth, and is formed with silicone rubber,
EP rubber or the like. The connecting member 6, on the
assumption that the switch units are vertically connected,
has a vertically line-symmetric shape with respect to the
15 horizontal axis (on the assumption that the switch unit has
upper and lower connecting members having the same shape.
It goes without saying that when the switch unit is formed
with upper and lower connecting members in different shapes,
it is necessary to change the connecting member 6 to have a
20 shape to be engaged with the switch unit). Regarding the
bushing 10, the connecting member 7, the connecting members
13 and 14, and the insulating cover 123, the surface
opposite to the surface on the side connected to the switch
unit is a flat member 17. They are stationary with
fastening members such as bolts from the flat member 17 via
the rubber ring 73 to the switch unit.
[0025]
In the present embodiment, the bushing 10 connected
5 to the breaker unit 2 is connected to the cable head 12 on
the rear surface side of the switchgear 1 and is connected
to the cable 11.
[0026]
Next, the structure of the disconnector unit 3 will
10 be described using Figure 4. The disconnector unit in the
figure is provided in a position in which the connecting
member is not connected on the upper side of the unit, as in
the case of the disconnector unit 3, in Figure 1. The
connecting member 6 and the connecting member 7, in place of
15 the insulating cover 123 are connected to the other
disconnector units 4 and 5. Further, in place of the
connecting member 6, the connecting member 7 may be
connected to the lower side. For example, in the
disconnector unit 5, the connecting member 7 in place of the
20 connecting member 6 is connected to the lower side.
[0027]
In the disconnector units 3, 4 and 5, since it is not
necessary to have current breaking performance as long as
they have a surge withstand voltage,upon opening, they have,
25 not the vacuum valve, but an air switch 41, and have a
stationary conductor 51 which also functions as a stationary
electrode, and a movable conductor 46 extending in the
horizontal direction. The conductor 46 has a band contact
48, corresponding to a movable electrode, which is opposite
5 to the stationary conductor 51 and is driven in the
horizontal dlrectlon lnto contact with or opened from the
stationary conductor 51. The stationary conductor 51 of the
air switch 41 is connected to a central conductor 52
provided at the center of the connecting member 13. The
10 central conductor 52 is provided with a band contact 53 for
electrical continuity with the stationary conductor 51.
Note that in the present embodiment, the connecting member
13 which extends in the horizontal direction on the rear
surface side is described as a representative element,
15 however, the connecting member 14 in place of the connecting
member 13 may be connected. Actually, among the three U, V
and W phase buses, with respect to the bus having an
intermediate height (the V phase surface in the present
embodiment), the remaining two phases (the U phase and the V
20 phase) are provided above and below in symmetric positions
with respect to the V phase bus having the intermediate
height. They do not extend straight in the horizontal
direction but need to be curved, therefore, regarding the U
phase and the W phase, the connecting member 14 is connected.
25 Further, when it is used as a grounding switch, the bushing
10 in place of the connecting member 13 is connected. In
the structure of the present embodiment, to easily change
the connection to the bushing 10 and the connection to the
connecting members 13 and 14 in correspondence with
5 installation environment, it has compatibility. That is,
the structure of the connection member is comrnonalized among
the respective switch units of the breaker unit 2 and the
disconnector units 3, 4 and 5.
[0028]
10 In the disconnector unit, as in the case of the
breaker unit 2, resin 42 such as epoxy for insulation is
provided around the air switch 41, and its exterior surface
is covered with conductive coating material 43 for grounding
Two conductors 44 and 45 are provided on the side surface of
15 the disconnector unit. The conductors 44 and 45 are engaged
with the connecting member 6 and the connecting member 7, to
ensure electrical continuity among the units (In Figure 4,
the conductor 45 is connected to the connecting member 6).
Further, regarding the disconnector unit positioned at an
20 end, the insulating cover 123 in place of the connecting
members 6 and 7 is provided on the end side (upper side or
lower side. In Figure 4, the upper side corresponds to the
end side).
[0029]
The movable conductor 46 extending in the horizontal
direction has a band contact 49 for collection with respect
to the conductors 44 and 45 on the periphery of the movable
conductor 46, on the front side. Further, an insulating rod
5 50 is connected to the front side end of the movable
conductor 46, and the insulating rod 50 itself is driven in
the horizontal direction with the disconnector unit
operation mechanism 9. The movable conductor 46 and the
band contact 48 are also driven in the horizontal direction
10 in accordance with the operation of the insulating rod 50 in
the horizontal direction.
[0030]
When the bushing 10, the connecting members 6 and 7,
the connecting members 13 and 14 and the insulating cover
15 123 are fixed to the disconnector unit, the rubber ring 73
is held between the disconnector unit and the bushing 10,
the connecting members 6 and 7 and the insulating cover 123.
The rubber ring 73 is used to ensure insulation between the
central high voltage member and the peripheral earth. It is
20 formed with silicone rubber, EP rubber or the like. It is
assumed that the switch unit is connected to the upper and
lower parts of the connecting member 6, and it has a linesymmetrical
shape with respect to the horizontal axis (it is
assumed that the switch unit has upper and lower connection
25 members having the same shape. When the switch unit is
formed such that the shapes of the upper and lower
connection members are different from each other, it goes
without saying that it is necessary to change the connecting
member 6 to have a shape to be engaged with the switch unit).
5 Regarding the bushing 10, the connecting member 7, the
connecting members 13 and 14 and the insulating cover 123,
the surface opposite to the surface on the side connected to
the switch unit is the flat member 17. They are fixed with
fastening members such as bolts from the flat member 17 via
10 the rubber ring 73 to the switch unit. The connection
member is basically similar to that of the above-described
breaker unit. Since they are similar to each other, they
have compatibility and easily replaced with another unit.
[0031]
15 In the present embodiment, the connecting members 13
and 14 are connected to the double buses A and B on the rear
surface side of the switchgear 1. Figure 2 is a diagram of
the switchgear 1 according to the present embodiment viewed
from the rear surface side to indicate connection status
20 among the buses and cables. The bus connection members to
be connected to the buses A and B are provided so as to be
shifted at predetermined intervals in a height direction and
the horizontal direction. Further, as it is apparent from
the connection members for the buses and the cables in
25 Figure 2 as a rear surface diagram, according to the
switchgear 1 according to the present embodiment, the
connection members for the on-site connected buses and
cables are all positioned on the rear surface side
accessible for the operator.
5 [0032]
Here the method for assembling the switchgear 1
according to the present embodiment will be described using
Figure 5 and Figure 6.
[0033]
10 Figure 5 indicates a method for assembling the switch
part. The switchgear 1 is set over sideways and the driving
direction of the movable electrodes of the respective switch
units is the height direction. In the present embodiment,
as the breaker unit 2 and the three disconnector units 3, 4
15 and 5 are used, these switch units are connected using the
connecting members 6 and 7 and fixed to the upper part of a
base 60. The connecting members 13 and 14 for connection to
the buses A and B, and the bushing 10 for connection to the
cable 11 are stationary to the respective units.
20 [0034]
When the breaker unit 2 and the disconnector unit 3,
4 and 5 have been assembled, as shown in Figure 6, the
switchgear 1 is returned to a normal status (it is set
upright such that the movable electrode driving direction
25 becomes the horizontal direction), thereafter, the breaker
unit operation mechanism 8 and the disconnector unit
operation mechanism 9 are installed, and the principal part
of the switchgear 1 is completed.
[0035]
5 It is necessary to fix the buses A and B and the
cable 11 on site. The method for fixing the buses A and B
and the cable 11 on site is shown in Figure 7. According to
the switchgear 1 in the present embodiment, as the
connection members for the buses and the cable are all
10 provided on the rear surface side of the switchgear 1, it is
possible to easily perform installation only by access from
the rear surface of the switchgear 1 regarding any of these
elements.
LO0361
15 The movable members of the breaker unit 2 and the
disconnector units 3, 4 and 5 forming the switchgear 1 are
provided to be driven in the horizontal direction, and the
units are arrayed in the height direction of the switchgear.
Further, when the principal circuit part is assembled, the
20 switchgear 1 is laid over the sideways. With this structure
and the method, it is possible to attach each of the members
without working against the gravity. It is possible to
improve the assembly workability, and it is advantageous in
reduction of the number of steps, i.e. economic efficiency.
25 [0037]
According to the present embodiment, since the
plurality of switch units having movable electrodes driven
in the horizontal direction are arrayed in the height
direction (not in spatially twisted positions but in
5 parallel), the operation mechanisms are collectively
provided on one side of the switchgear casing, and the
connection members for the buses and the cables are
collectively provided on the other side of the casing, the
connection members for working on site are in positions
10 easily accessible to the operator from the rear surface side
of the casing. Thus the workability is improved.
Further, in the present embodiment, the breaker unit
and the disconnector unit have compatibility of the
15 connection members for the various types of bushing 10,
connecting members 6 and 7, connecting members 13 and 14,
insulating cover 123 and the like, and it is possible to
easily change the combination in correspondence with
installation environment. That is, the commonality of
20 connection between the buses and mutual units is achieved,
and various circuitries are easily realized. More
particularly, the connection members in the breaker unit and
the disconnector unit for the connecting members have a
common structure.
25 [0039]
Further, in the present embodiment, with respect to
the V phase bus having an intermediate height, the remaining
two phase buses are provided above and below in positions
symmetrical to the V phase bus having the intermediate
5 height. The structure of the connecting member 14, which
becomes a connection member for the U phase and W phase
buses provided above and below with respect to the V phase
bus provided at the intermediate height, is cornmonalized as
one type structure. Accordingly, it is possible to further
10 improve the versatility of the member.
[0040]
Further, since the buses A and B are also arrayed in
the height direction on the rear surface side of the
switchgear 1, it is possible to easily perform the
15 attachment of the bus on site.
[0041]
Note that the present embodiment has been described
with the double-bus type switchgear as an example, however,
it is possible to form a single-bus type switchgear with a
20 combination of the bus A, the breaker unit 2 and the
disconnector units 3 and 4.

[0042]
Embodiment 2 will be described using Figure 8. Note
25 that the explanations of overlapping constituent elements
between the embodiment and Embodiment 1 (and effects
obtained by employing the constituent elements) will be
omitted.
[0043]
5 In the present embodiment, a case where the
disconnector unit in a double-bus type switchgear has
current breaking performance when, e-g., a loop current
breaking duty is required of the disconnector, will be
described. Figure 8 shows the configuration. Since the
10 disconnector unit 3 of the air switch shown in Figure 4
lacks the breaking capability, the breaker unit 2 shown in
Figure 3 described in Embodiment 1 is applied to the
disconnector connected to each of the first bus A and the
second bus B. Note that it is arranged such that the
15 breaker unit 2 connected to the first bus A and the second
bus B ensures inter-electrode withstand voltage defined with
the disconnector standards and has surge withstand voltage
upon opening.
[0044]
20 As described in Embodiment 1, the breaker unit 2 and
the disconnector unit 3 have a comrnonalized structure for
connection with various connection members, thus have
compatibility. Accordingly, the disconnector connected to
each of the first bus A and the second bus B (although it is
25 necessary that the disconnector is compliant with the
disconnector standards) is basically obtained by replacing
the disconnector unit 3 with the breaker unit 2. In this
manner, in correspondence with the user's purpose, it is
possible to adopt the circuitry in Figure 1 in Embodiment 1
5 or to adopt the circuitry in Figure 8 in the present
embodiment, by merely selecting the breaker unit 2 or the
disconnector unit 3.

LO0451
10 Embodiment 3 will be described using Figure 9. The
explanations of overlapping constituent elements between the
present embodiment and the above-described embodiments will
be omitted.
[0046]
The present embodiment is an example where bus
section panel is realized in a double-bus type switchgear.
The bus section panel is formed with left and right
switchgears in a row-board structure as shown in Figure 9.
The circuitry of the bus section panel is also shown in
Figure 11.
[0047]
The bus section panel is provided with, in place of
the cable 11 provided in the incoming panel and the feeder
panel, a communication bus C to connect the left and right
switchgears. Since connection is made with the
communication bus C, it is not necessary that the two
switchgears are provided with the breaker unit, as long as
one switchgear is provided with the breaker unit. In the
structure shown in Figure 9, only the switchgear provided on
5 the left side has the breaker unit 2. The connecting
members 13 and 14, in place of the bushing 10, are connected
to the breaker unit 2 (it is desirable that the connecting
member 13 is provided in a phase positioned in the middle of
the height direction and the connecting member 14 is
10 provided in a phase arranged above and below symmetrically
with respect to the phase positioned in the middle of the
height direction. This point is similar to the abovedescribed
embodiments) for connection with the communication
bus C. In a switchgear without a breaker unit, a
15 disconnector unit 103 is provided in place of the breaker
unit 2, and the disconnector unit 103 is connected to the
communication bus C on the rear surface side.
[0048]
Further, in the switchgear applied to the bus section
20 panel, as it is not a double-bus type using the abovedescribed
buses A and B (except the communication bus C),
and one disconnector unit can be omitted.
[0049]
Note that when the switchgear is formed as in the
25 case of the present embodiment, since the connection
structure of the connecting members 13 and 14 and the
bushing 10 with respect to the breaker unit 2 and that with
respect to the disconnector unit 3 are cornrnonalized, the
connection structure between the communication bus C and the
5 breaker unit 2 is made with the same members as those of the
connection structure with respect to the buses A and B.
Note that as described above, the breaker unit 2 is not
necessary in the right side switchgear, and the disconnector
unit 103 is utilized for connection. It is not necessary to
10 operate the movable conductor 81 and the movable conductor
is fixed inside. That is, regarding the disconnector unit
103, the operation mechanism is not necessary.
[0050]
That is, it is possible to easily assemble the bus
15 section panel using the switchgear described in the abovedescribed
embodiments.

[0051]
Embodiment 4 will be described using Figure 10. In
20 the present embodiment, the explanations of overlapping
constituent elements between the present embodiment and the
above-described embodiments will be omitted.
[0052]
The present embodiment is an example where a bus tie
25 panel is realized in a double-bus type switchgear. The bus
tie panel is formed with left and right switchgears in a
row-board structure as shown in Figure 10 as in the case of
the bus section panel described in Embodiment 3. The
circuitry of the bus tie panel is also shown in Figure 11.
5 In the bus tie panel, the difference from the bus section
panel described in Embodiment 3 is that in the double buses
A and B, different buses are connected in the left and right
switchgears (when one bus is the bus A, the other bus is the
bus B) .
10 [0053]
Also in the present embodiment, since the connection
structure of the connecting members 13 and 14 and the
bushing 10 with respect to the breaker unit 2 and that with
respect to the disconnector unit 3 are commonalized, the
15 connection structure between the communication bus C and the
breaker unit 2 is made with the same members as those of the
connection structure with respect to the buses A and B.
[0054]
That is, it is possible to easily assemble the bus
20 tie panel using the switchgear as described in the abovedescribed
embodiments.
[OOSS]
Note that the combinations described in the abovedescribed
embodiments is an example, and it is also a good
25 merit of the present invention that other various
combinations are realized in correspondence with
installation environment.
Reference Signs List
[0056]
5 l...switchgear
2...breaker unit
3,4,5,103 ... disconnector unit
6,13,14. . . connecting member
8...breaker unit operation mechanism
9...disconnector unit operation mechanism
10 ... bushing
11 ... cable
12 ... cable head
15 ... stationary electrode
16 ... movable electrode
17 ... flat member
21 ... vacuum valve
22, 42.. . resin
23, 43, 64 ... conductive coating material
24, 25, 44, 45.. .conductor
26, 46, 81. . .movable conductor
27 ... member
28, 48, 49, 53, 62, 72.. .band contact
29, 50 ... insulating rod
30, 51 . . . stationary conductor
41 . . . air switch
52, 61 . . . central conductor
63. . . flange
73. . . rubber ring
123 ... insulating cover
A, B...bus
C...cornmunication bus

CLAIMS
Claim 1
A switchgear comprising:
a plurality of switch units having a stationary
5 electrode, and a movable electrode opposite to the
stationary electrode and driven in a horizontal direction
into contact with or opened from the stationary electrode;
a plurality of operation mechanisms that operate the
movable electrode in the plurality of switch units;
10 a bus connection member, provided in the switch unit,
and connected to a bus; and
a casing accommodating all the bus connection member,
the plurality of switch units and the plurality of operation
mechanisms,
wherein the plurality of switch units are provided in
a height direction,
and wherein the plurality of operation mechanisms are
provided on a front surface side or a rear surface side of
the casing,
further wherein the plurality of bus connection
members are provided on the other side of the casing.
Claim 2
The switchgear according to claim 1,
wherein the switch units are interconnected with a
25 connecting member, and in the respective switch units, a
connection member for the connecting member is formed to
have compatibility.
Claim 3
The switchgear according to claim 2,
wherein the switch unit has a breaker unit having
current breaking performance and a disconnector unit having
surge withstand voltage upon opening,
and wherein the connection member for the connecting
member in the breaker unit and the disconnector unit have a
10 common structure so as to have compatibility.
Claim 4
The switchgear according to any one of claims 1 to 3,
wherein the switch units of three phases are provided
at the same height,
and wherein buses of three phases are provided at
different heights,
further wherein among the buses of three phases, with
respect to the bus having an intermediate height, the
remaining buses of two phases are provided above and below
20 in approximately symmetrical positions from the bus having
the intermediate height,
further wherein regarding the shape of the bus
connection member connecting the switch unit and the bus,
the bus connection members provided above and below with
respect to the bus at the intermediate height have a common
shape.
Claim 5
The switchgear according to any one of claims 1 to 4,
wherein the switch unit has:
an insulating rod that is connected to the operation
mechanism and that operates in a horizontal direction;
a movable conductor that operates in the horizontal
direction in accordance with driving of the insulating rod;
10 a conductor provided above and below with respect to
the insulating rod and the movable conductor; and
a band contact in slide electrical continuity with
the conductor and electrically connected to the movable
conductor,
wherein the switch unit and the connection member for
the conductor connected to the switch unit have a rubber
ring.
Claim 6
The switchgear according any one of claims 1 to 5,
wherein the bus is doubled for each phase,
and wherein the switchgear has the breaker unit
having current breaking performance and three disconnector
units arrayed on the upper side in the height direction of
the breaker unit,
further wherein the disconnector unit has surge
withstand voltage upon opening,
further wherein among the three disconnector units,
one disconnector unit is connected to one bus of the double
5 buses, and another disconnector unit is connected to the
other bus of the double buses, and the remaining one
disconnector unit is formed to enable switching to
electrical continuity with the ground side or disconnection,
further wherein the breaker unit is connected to a
10 cable.
Claim 7
The switchgear according to claim 6,
wherein among the disconnector units, the two
disconnector units connected to the double buses further
15 have current breaking performance.
Claim 8
A switchgear having a row-board structure of the two
switchgears according to any one of claims 1 to 5,
wherein one switchgear has a breaker unit having
20 current breaking performance and two disconnector units
arrayed on the upper side in the height direction of the
breaker unit,
and wherein the disconnector unit has surge withstand
voltage upon opening,
further wherein in the two disconnector units, one
disconnector unit is connected to one bus of the double
buses, while the other disconnector unit is formed to enable
switching to electrical continuity with the ground side or
5 disconnection,
further wherein the breaker unit is connected to a
communication bus,
further wherein the other switchgear has three
disconnector units arrayed in the height direction,
10 further wherein the disconnector unit has surge
withstand voltage upon opening,
further wherein among the three disconnector units,
one disconnector unit is connected to one bus of the double
buses, another disconnector unit is formed to enable
15 switching to electrical continuity with the ground side or
disconnection, and the remaining one disconnector is
connected to the communication bus.
Claim 9
A switchgear having a row-board structure of the two
20 switchgears according to any one of claims 1 to 5,
wherein one switchgear has a breaker unit having
current breaking performance and two disconnector units
arrayed on the upper side in the height direction of the
breaker unit,
and wherein the disconnector unit has surge withstand
voltage upon opening,
further wherein in the two disconnector units, one
disconnector unit is connected to one bus of the double
5 buses, and the other one disconnector unit is formed to
enable switching to electrical continuity with the ground
side or disconnection,
further wherein the breaker unit is connected to the
communication bus,
10 further wherein the other switchgear has three
disconnector units arrayed in the height direction,
further wherein the disconnector unit has surge
withstand voltage upon opening,
further wherein among the three disconnector units,
15 one disconnector unit is connected to the bus which is not
the one bus of the double buses, and another disconnector
unit is formed to enable switching to the electrical
continuity with the ground side or disconnection, and the
remaining one disconnector unit is connected to the
20 communication bus.
Claim 10
The switchgear according to any one of claims 6 to 9,
wherein in the respective breaker units and the
disconnector units, the respective movable electrodes are
25 electrically interconnected,
and wherein in the unit having current breaking
performance, the stationary electrode and the movable
electrode are formed by resin molding a vacuum valve with
-. vacuum-sealed inside, and the stationary electrode is
5 electrically connected to the cable,
further wherein the disconnector unit is formed by
resin molding the air insulating switch.
i.
Claim 11
An assembling method for a switchgear having:
10 a plurality of switch units having a stationary
electrode, and a movable electrode opposite to the
stationary electrode and driven in a horizontal direction
into contact with or opened from the.stationary electrode;
and
15 a plurality of operation mechanisms that operate the
) movable electrode in the plurality of switch units,
comprising:
a step of fixing the switch unit with respect to a
I
base so as to set a driving direction of the movable
20 electrode as a height direction;
a step of, after fixing of the switch unit, setting
the switch unit upright so as to set the driving direction
to the horizontal direction; and
a step of, after the above step, connecting the
25- operation mechanism to the plurality of switch units.