JP2000253523A - Air insulated switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an installation space by disposing a vertical one-point cut porcelain gas circuit breaker and a vertical single-cut breaker on a common bed. SOLUTION: A vertical single-out breaker 31 is disposed on one end side of a common frame 35, and with an insulation distance A between its upper terminal 31d portion and the front end portion of an isolator blade 33c in the pole open condition of the isolator 33 taken as a required minimum insulation distance withstanding the voltage applied to the point between poles at the time of pole opening of the vertical single-cut breaker 31, the mobile side supporting insulator 33a of the disconnector 33 is disposed. A fixed side support porcelain 33h is arranged at the input position of a disconnector blade 33c. In an insulation distance B between three phases, the disconnector 33 is of vertical single-cut, and the portion of the lower terminal 31c of the vertical single-cut breaker 31 becomes the largest, so that in the energizing condition of the portion, a phase-to-phase distance is determined as a required minimum distance withstanding the voltage applied to between the phases. The vertical single-cut breaker and the disconnector 33 are installed on a common bed 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated switchgear for switching a power system of a substation when installed in the atmosphere.

[0002]

2. Description of the Related Art A general configuration of a substation facility in a substation or the like is that power is received from a transmission line, supplied to a transformer via a primary-side bus, and transformed in the transformer to be supplied to a secondary-side bus. And is supplied from the secondary-side bus to the load circuit. In such a configuration, a line unit for opening and closing a receiving line from a transmission line to a primary bus, a primary transformer unit or a transformer for opening and closing a transformer circuit between a primary bus and a transformer. It consists of a transformer unit on the secondary side for supplying to the secondary side and a bus on the secondary side of the transformer, a branch unit for opening and closing a branch line from the secondary side bus to the load circuit, and the like. An opening / closing device having substantially the same configuration is installed for each unit connected to the bus on the next side. The present invention is intended to reduce the installation space when these opening and closing devices are installed in the air.

[0003] Conventional open / close devices installed in the air are individually installed in consideration of an insulation distance, an inspection space, and the like in each of the necessary devices, and as a whole, a large installation space is required. As a method for reducing the installation space of a conventional switchgear installed in the air, for example, as shown in FIG. 24, an insulator type gas circuit breaker in which an optical current transformer is added as a current detection function to a cutoff function is actually used. 61-186
No. 136. In FIG. 24, reference numeral 1 denotes a cut-off insulator housing the cut-off portion, 2 denotes a support insulator for insulating the cut-off portion from the ground, 3 denotes a lower terminal, 4 denotes an upper terminal, and 5 denotes a lower insulator of the circuit breaker. A lower support member attached to the gantry, 6 is a fixed contact provided on the upper part of the insulator tube 1, 7 is a movable contact which operates up and down to open and close current, and 8 covers an outer periphery of the contact portion. An insulating nozzle disposed, 9 is a piston supported by the lower terminal 3, 10 is a movable contact 7, a puffer cylinder to which an insulating nozzle 8 is attached and is fitted into the piston 9 to form a puffer chamber G, 11 is a movable contact The contact 7, the insulating nozzle 8, and the puffer cylinder 10 are integrally moved up and down, and the fixed contact 6,
An insulating operation rod 12 for opening and closing the movable contact 7 is an opening and closing operation mechanism.

[0005] Reference numeral 15 denotes a detection unit for detecting an electric signal proportional to a magnetic field due to a current flowing through the contact unit, 16 denotes an electro-optical signal converter for converting the electric signal detected by the detection unit 15 into an optical signal, 17 denotes an optical fiber cable, Reference numeral 18 denotes an optical-electrical signal converter that converts an optical signal into an electric signal.

[0005] The use of the insulator-type gas circuit breaker having the current detection function in the switchgear as compared with the case where the current transformer and the circuit breaker are separately installed and the devices are connected by the connection conductor is compared with the case where the current transformer and the circuit breaker are separately installed. The installation space for the current transformer is not required, and the installation space can be reduced.

[0006] In addition to the above, as an apparatus having a composite function, a capacitor formed inside a lead-in bushing of a grounded tank type gas circuit breaker in which a shut-off portion is housed in a grounded closed container is connected in series. There is an example in which a voltage detection function is provided using a circuit configuration.

[0007]

As described above, the installation space of the conventional air-insulated switchgear has been reduced by combining the functions of the components of the power receiving line or the branch line. However, the portion that can be combined is limited to the current detection function or the voltage detection function, and each device is individually installed, and there is a problem that the installation space cannot be reduced so much as an air-insulated switchgear.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and rationally determines the insulation distance between devices and the position of a check space for each unit constituting a power receiving line or a branch line of a substation. It is an object of the present invention to reduce the installation space as an aerial insulated switchgear for each unit of a power receiving line or a branch line, thereby reducing land costs and equipment costs.

[0009]

An air-insulated switchgear according to a first aspect of the present invention includes a vertical single-point insulator type gas circuit breaker having a current detection function, and a vertical single-point insulator type gas circuit breaker. A movable support insulator and a drive insulator to which the movable contactor and the disconnector blade are attached are located at a position separated by a predetermined insulating distance between the upper terminal and the tip of the disconnector blade in the vertical state at the time of opening, A vertical single-point disconnector, in which a fixed-side support insulator having a fixed-side contact attached thereto is disposed at a position where a disconnector blade is inserted, is disposed on a common mount.

An air-insulated switchgear according to a second aspect of the present invention is provided with a current detecting function, and has an inclined single-point insulator type gas circuit breaker in which an interrupting portion is arranged in an inclined manner, and the inclined single-point insulator type gas circuit breaker. A movable contact, a disconnector blade, and one end of a drive insulator are attached to the lower terminal in the middle of the above, and a fixed-side support insulator with a fixed-side contact attached at the throw-in position of the disconnector blade. And are arranged on a common mount.

The air-insulated switchgear according to a third aspect of the present invention is provided with a current detecting function, and is a two-point insulator type in which two breaking portions are arranged in a V-shape or a straight line and supported by a supporting insulator. A gas circuit breaker and a movable support insulator and a drive insulator to which a movable contact and a disconnector blade are attached are disposed in the vicinity of one terminal of the two-point insulator gas circuit breaker,
A vertical single-point disconnector, in which a fixed-side support insulator having a fixed-side contact attached thereto is disposed at a position where a disconnector blade is inserted, is disposed on a common mount.

According to a fourth aspect of the present invention, there is provided an aerial insulated switchgear according to any one of the first to third aspects of the present invention, wherein the disconnector blade of the vertical single-point disconnector is mounted on the upper side of the disconnector fixed side. This is a lightning arrester with contacts.

According to a fifth aspect of the present invention, there is provided an air-insulated switchgear according to any one of the first to third aspects of the present invention. This is an insulator type capacitor of a capacitor type voltage transformer to which a contact is attached.

According to a sixth aspect of the present invention, there is provided an air-insulated switchgear comprising: a vertical single-point insulator type gas circuit breaker having a current detecting function; and a lower terminal at an intermediate portion of the vertical single-point insulator type gas circuit breaker. A fixed-side support insulator having a movable-side support insulator and a drive insulator having a movable contact portion and a disconnector blade attached thereto at a position separated by a predetermined insulation distance, and a fixed-side contactor being attached at a closing position of the disconnector blade. A first disconnector with a vertical one-point disconnection, and a predetermined insulation distance between the upper terminal of the vertical one-point insulator gas circuit breaker and the tip of the vertical disconnector blade at the time of opening. A movable single-sided support insulator and a drive insulator having a movable contact portion and a disconnector blade attached thereto are arranged at a position, and a fixed-side support insulator having a fixed-side contact attached thereto is arranged at a closing position of the disconnector blade. two In which it is disposed a disconnector on a common frame.

An air-insulated switchgear according to a seventh aspect of the present invention is provided with a current detecting function, and has a sloped single-point insulator type gas circuit breaker in which a cut-off portion is arranged in an inclined manner. The movable contact part, the disconnector blade and one end of the drive insulator are attached to the terminal part on the tip side, and the fixed-side support insulator with the fixed-side contact attached at the insertion position of the disconnector blade. A fixed contact with a movable contact part, one end of a disconnector blade and a drive insulator attached to the middle terminal part of the disconnector and the inclined one-point disconnection gas circuit breaker, and a fixed contact attached to the insertion position of the disconnector blade A vertical disconnection second disconnector on which a support insulator is disposed is disposed on a common mount.

An air-insulated switchgear according to claim 8 of the present invention has a current detecting function, and is a two-point insulator type in which two breaking portions are arranged in a V-shape or a straight line and supported by a supporting insulator. A gas breaker and a movable support insulator and a drive insulator having a movable contact portion and a disconnector blade attached thereto are disposed near one end side terminal of the two-point insulator gas breaker. A vertical disconnecting first disconnector having a fixed-side support insulator having a fixed-side contact attached thereto, and a movable contact portion and a disconnector in proximity to the other end side terminal of the two-point disconnected insulator type gas circuit breaker. A movable single-sided support insulator and a drive insulator to which a switch blade is attached are arranged, and a fixed single-sided support insulator to which a fixed-side contact is attached is arranged at a closing position of the disconnector blade. It is arranged on a common frame .

According to a ninth aspect of the present invention, there is provided an air-insulated switchgear according to the sixth to eighth aspects of the present invention, wherein the first disconnector and the second disconnector have the respective disconnecting blades at the closing positions. And lightning arresters each having a fixed contact of a disconnector mounted thereon.

According to a tenth aspect of the present invention, there is provided an air-insulated switchgear according to any one of the sixth to eighth aspects of the present invention, wherein the disconnecting blade of the first disconnecting switch is provided at a position above the fixed side of the disconnecting switch. Arrange the insulator type capacitor of the capacitor type voltage transformer with the contact attached, and place the lightning arrester with the fixed side contact of the disconnector mounted on the upper part at the insertion position of the disconnector blade of the second disconnector. It was done.

According to an eleventh aspect of the present invention, there is provided an air-insulated switchgear having a zinc oxide element inside a porcelain tube at a position where a disconnector blade of the first disconnector according to the sixth to eighth aspects is inserted. The zinc oxide element of the lowermost layer is used as a voltage dividing element, and a current detecting function is provided for detecting a voltage between upper and lower ends of the voltage dividing element and converting the voltage into a voltage signal. A lightning arrester to which a child is mounted is arranged, and a lightning arrester to which a fixed-side contact of the disconnector is mounted at the upper position of the disconnecting blade of the second disconnector is arranged.

According to a twelfth aspect of the present invention, there is provided an air-insulated switchgear according to the first or sixth aspect of the present invention, comprising:
The inner peripheral portion is formed of an FRP insulating member, and the outer peripheral portion is formed of a composite insulator formed of a weather resistant resin.

According to a thirteenth aspect of the present invention, there is provided an air-insulated switchgear having a current detecting function according to the second or seventh aspect of the present invention. The insulating insulator tube has an inner peripheral portion formed of an FRP insulating member and an outer peripheral portion formed of a composite insulator formed of a weather-resistant resin.

An aerial insulated switchgear according to a fourteenth aspect of the present invention is provided with a current detecting function according to the third or eighth aspect, and the two interrupting portions are arranged and supported in a V-shape or linear shape. The insulator tube of the two-point insulator gas circuit breaker supported by the insulator has an inner peripheral portion formed of a FRP insulating member and an outer peripheral portion formed of a composite insulator formed of a weather-resistant resin.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 As a configuration of a line unit, a transformer unit, or a branch unit connected to a primary bus or a secondary bus of a switchgear installed in a substation or the like, a configuration in the case where a disconnector is not installed on the bus side is shown in FIG. There is a configuration as shown in a single line diagram in FIG. FIG.
, 21 is a circuit breaker, 22 is a current transformer, 23 is a disconnector, 24 is an arrester, and 25 is a capacitor type voltage transformer. FIG. 1A shows a configuration in which a current transformer 22 and a disconnector 23 are arranged on one side of a circuit breaker 21, and FIG. 1B shows a lightning arrester 24 on the end side of the disconnector 23 having the configuration of FIG. Connected,
FIG. 1C shows a configuration in which a capacitor type voltage transformer 25 is connected to the end of the disconnector 23 having the configuration shown in FIG.

In the first embodiment, the configuration including the circuit breaker, the current transformer, and the disconnector shown in FIG. 1A is configured as an air-insulated switchgear. FIG. 2 shows the configuration of the first embodiment. FIG. 2A is a side view, and FIG. 2B is a plan view.
In the figure, reference numeral 31 denotes a vertical single-point insulator type gas circuit breaker, in which a fixed contact, a movable contact, an insulating nozzle and the like are accommodated in an insulator tube, and a cut-off portion 31a and an operation rod and the like are accommodated in a support insulator tube. Part 31b, blocking part 31a and supporting part 31b
, A lower terminal 31c disposed above, an upper terminal 31d disposed above the blocking part 31a, and an operating mechanism 31e disposed at the lower end of the support part 31b. An optical current transformer 32 is incorporated. Reference numeral 31M denotes an inspection space for taking out and inspecting the shut-off portion of the vertical single-point insulator gas circuit breaker 31.

Reference numeral 33 denotes a vertical disconnection disconnector. A movable contact portion 33b is mounted on a movable support insulator 33a, and a disconnector blade 33c is mounted. A disconnector blade 33 is mounted on a side of the movable support insulator 33a. A drive insulator 33d for driving the drive insulator 33c in the vertical direction is disposed, and a drive mechanism 33e is provided at a lower end of the drive insulator 33d.
The fixed-side support insulator 33h with the fixed-side contact 33f and the disconnector terminal 33g attached thereto is disposed at the top of the disconnecting position, and the disconnector blade 33c opens in the vertical direction. Reference numeral 34 denotes a connection conductor that connects between the lower terminal 31c of the vertical single-point insulator gas circuit breaker 31 and the movable contact portion 33b of the disconnector 33. Reference numeral 35 denotes a common mount on which a vertical single-point insulator gas circuit breaker 31 and a vertical single-point disconnector 33 are disposed. The configuration for one phase described above is configured into three phases of a U phase, a V phase, and a W phase as shown in the plan view of FIG.

The vertical single-point insulator gas circuit breaker 31 is disposed at one end of the common mount 35, and the upper terminal 31d of the vertical single-point insulator gas breaker 31 and the open state of the disconnector 33 indicated by a dotted line. The insulation distance A between the disconnector blade 33c and the tip of the disconnector blade 33c at the movable side of the disconnector 33 is defined as the minimum necessary insulation distance that can withstand the voltage applied between the poles when the vertical one-point insulator gas circuit breaker 31 is opened. The support insulator 33a is arranged, the fixed-side support insulator 33h is arranged at the input position of the disconnector blade 33c, and the insulation distance B between the three phases is such that the disconnector 33 is vertically cut at one point and the vertical one-point insulator type cutoff The inter-phase distance is determined as the minimum distance required to withstand the voltage applied between the phases when the lower terminal 31c of the vessel 31 is the largest and the energized state of this section forms an air-insulated switchgear.

In the air insulated switchgear thus constructed, the interphase distance is set short by using the disconnector 33 as a vertical one-point disconnector, and the vertical one-point insulator type gas circuit breaker 3 is used.
1 and the disconnecting switch 33 are disposed on the common stand 35, so that the distance between the devices is shortened, and the installation space is reduced as compared with the case where the circuit breaker, the current transformer, and the disconnecting switch are individually installed. This has the effect of reducing the cost of land.

Embodiment 2 Embodiment 2 is shown in FIG.
The circuit breaker, current transformer, disconnector, and lightning arrester of (b) are arranged on a common mount to constitute an air-insulated switchgear.
FIG. 3 shows a side view of the configuration of the second embodiment. The plan view is substantially the same as the side view of FIG. In the figure, an optical current transformer 3 having a current detection function is shown.
The vertical single-point insulator type gas circuit breaker 31 provided with 2 and the common mount 35 are the same as those in the first embodiment. Numeral 43 denotes a vertical disconnection switch, which includes a movable support insulator 33a and a movable contact portion 33.
b, the disconnector blade 33c, the drive insulator 33d, the drive mechanism 33e, the fixed contact 33f and the disconnector terminal 33g are the same as the corresponding parts of the disconnector 33 of the first embodiment. In this configuration, a lightning arrester 44 to which a fixed contact 33f and a disconnector terminal 33g are attached is arranged.

In this configuration, the lightning arrester 44 is arranged at the fixed-side support insulator 33h of the disconnector 33 of the first embodiment, so that the lightning arrestor is constituted by a circuit breaker, a current transformer, a disconnector, and a lightning arrester. The medium insulated switchgear can be configured in the same installation space as in the first embodiment, and the installation space for current transformers and lightning arresters is smaller than when installing conventional circuit breakers, current transformers, disconnectors, and lightning arresters individually. It becomes unnecessary and the common stand 35
, The distance between the devices between the circuit breaker 31 and the disconnector 43 is shortened, the device cost of the disconnector 43 is reduced, the installation space is reduced, and the land cost of the substation is reduced. can get.

Embodiment 3 Embodiment 3 is similar to FIG.
The circuit breaker, current transformer, disconnector, and capacitor type voltage transformer of (c) are arranged on an insulated switchgear on a common mount. FIG. 4 shows a side view of the configuration of the third embodiment.
Also in this configuration, the plan view is substantially the same as the side view of the first embodiment shown in FIG. In the figure, a vertical single-point insulator type gas circuit breaker 31 provided with an optical current transformer 32 having a current detection function has the same configuration as that of the first embodiment. Reference numeral 53 denotes a disconnector, which includes a movable-side support insulator 33a, a movable contact portion 33b, a disconnector blade 33c, and a drive insulator 33.
d, the drive mechanism 33e, the fixed-side contact 33f, and the disconnector terminal 33g are the same as the corresponding parts of the disconnector 33 of the first embodiment, and the insulator of the capacitor-type voltage transformer is provided at the closing position of the disconnector blade 33c. Arrange the capacitor 54,
A fixed contact 33f and a disconnector terminal 33g are provided on the upper side.
It is the structure which attached. 55 is a common stand.

In this configuration, the insulator type capacitor 54 of the capacitor type voltage transformer is arranged at the closing position of the disconnector blade 33c of the disconnector 33 of the configuration of the first embodiment, so that the circuit breaker, the disconnector and the capacitor type The air-insulated switchgear composed of a voltage transformer can be constructed in the same installation space as in the first embodiment, and compared with the case where the conventional circuit breaker, current transformer, disconnector and capacitor type voltage transformer are separately installed. As a result, the installation space for the current transformer and the capacitor type voltage transformer is not required, and the arrangement between the circuit breaker 31 and the disconnector 53 is shortened by disposing the common stand 55, and the equipment cost of the disconnector 53 is reduced. , The installation space is reduced, and the site cost of the substation is reduced.

Embodiment 4 FIG. Embodiment 4 is shown in FIG.
The configuration comprising the circuit breaker, current transformer and disconnector of (a)
An air-insulated switchgear with a built-in current transformer with a current detection function and an integrated one-point-cut insulator-type gas circuit breaker with an inclined cut-off section, which is integrated with the disconnector. is there. FIG. 5 shows the configuration of the fourth embodiment. FIG. 5A is a side view, and FIG. 5B is a plan view. In the figure, reference numeral 61 denotes an inclined single-point insulator type gas circuit breaker, in which a fixed contact, a movable contact, an insulating nozzle, and the like are housed in an insulator tube. The support portion 61b accommodated in the tube, the lower terminal 61c disposed between the blocking portion 61a and the support portion 61b, the upper terminal 61d disposed above the blocking portion 61a, and the operating mechanism disposed at the lower end of the support portion 61b. The current transformer 32 is built in the lower part of the interrupting part 61a as a current detecting function. Reference numeral 61M denotes an inspection space for inspecting the cutoff portion of the inclined single-point insulator gas circuit breaker 61.

Numeral 63 designates a disconnector, and a movable contact portion 63b is provided at a lower terminal 61c of the inclined single-point insulator gas circuit breaker 61.
Is attached, the disconnector blade 63c is mounted, and the drive insulator 63 for driving the disconnector blade 63c in the vertical direction.
d is disposed, and a driving mechanism 63 is provided at a lower end of the driving insulator 63d.
e, and a fixed-side support insulator 33h with a fixed-side contact 33f and a disconnector terminal 33g attached to the upper portion at the throw-in position of the disconnector blade 63c as in the first embodiment.
Are arranged, and the disconnector blade 63c is a disconnector with a vertical one-point disconnection that opens upward in the vertical direction. Reference numeral 65 denotes a common mount on which the inclined single-point insulator type gas circuit breaker 61 and the vertical single-point disconnector 63 are disposed.

In this configuration, an inclined single-point insulator type gas circuit breaker 61 is disposed at one end of a common base 65, and an upper terminal 61d of an inclined portion 61a of the inclined single-point insulator type gas circuit breaker 61 is disposed. The insulation distance A between the disconnecting switch blade 63c and the tip of the disconnecting switch blade 63c in the open state of the disconnecting switch 63 indicated by a dotted line must withstand the voltage applied between the poles when the inclined single-point insulator gas circuit breaker 61 is opened. The movable contact portion 63b of the disconnector 63 is mounted as a minimum insulation distance, and the disconnector blade 63 is mounted.
The fixed-side support insulator 33h is arranged at the input position of c, and the insulation distance B between the three phases is the same as in the first or second embodiment.
Insulated single-point cut-off gas circuit breaker 6 that is the shortest distance between phases
The aerial insulated switchgear is configured by disposing the lower terminal 61c at a minimum necessary insulation distance that withstands a voltage applied between phases when the lower terminal 61c is energized.

In this configuration, an inclined single-point insulator type gas circuit breaker 61 incorporating the optical current transformer 32 is provided, and the movable side contact portion 63b of the disconnector 63 is connected to the lower terminal portion 61c of the inclined single-point insulator type gas circuit breaker 61. By mounting and installing the disconnector blade 63c, the equipment cost of the disconnector 63 is reduced,
By arranging the inclined single-point insulator gas circuit breaker 61 and the disconnector 63 on the common mount 65, the distance between the devices can be reduced, and the common mount 65 becomes smaller, and is installed more than in the case of the first embodiment. The space can be reduced, the effect of reducing the land cost of the substation is great, and the cost of the disconnector can be reduced.

Embodiment 5 In the fifth embodiment, FIG.
The configuration consisting of the circuit breaker, current transformer, disconnector and lightning arrestor shown in (b) is integrated with the disconnector and lightning arrester using the inclined single-point insulator type gas circuit breaker with current detection function, and is arranged on the common mount. This is the configuration of the aerial insulated switchgear. FIG. 6 shows the configuration of the fifth embodiment. The plan view is substantially the same as FIG. 5B of the side view of the first embodiment, and thus the description thereof is omitted. In the figure, the inclined single-point insulator type gas circuit breaker 61 provided with the optical current transformer 32 having the current detection function, and the common gantry 65 have the same configurations as those of the fourth embodiment. Reference numeral 73 denotes a vertical disconnecting disconnector, which is a fixed-side support insulator 3 of the disconnector 63 shown in FIG.
This is a configuration in which the lightning arrester 44 of the second embodiment shown in FIG. Other configurations are the same as those of the fourth embodiment.

With this configuration, the configuration provided with the inclined single-point insulator type gas circuit breaker having the current detection function, the disconnector, and the lightning arrester can be arranged in the same installation space as in the fourth embodiment. Compared to installing individual current transformers, current transformers, disconnectors, and lightning arresters, installation space for current transformers and lightning arresters is no longer necessary, the distance between devices is reduced, installation space is reduced, and substation The effect of reducing the land cost is large, and the effect of reducing the cost of the disconnector can be obtained.

Embodiment 6 FIG. Embodiment 6 is similar to FIG.
The circuit breaker, current transformer, disconnector, and capacitor type voltage transformer of (c) are constructed by using an inclined single-point insulator type gas circuit breaker incorporating an optical current transformer having a current detection function. 1 is a configuration of an air-insulated switchgear in which a common mount is arranged integrally with a voltage transformer. FIG. 7 shows a side view of the configuration of the sixth embodiment. In the figure, an inclined single-point insulator type gas circuit breaker 61 provided with an optical current transformer 32 having a current detection function has the same configuration as that of the fourth embodiment. Reference numeral 83 denotes a vertical disconnection disconnector. The insulator-type capacitor of the capacitor-type voltage transformer shown in FIG. 4 of the third embodiment is provided on the fixed-side support insulator 33h of the disconnector 63 of the fourth embodiment shown in FIG. 54 is arranged. 85 is a common stand. Other configurations are the same as those of the fourth embodiment.

With this configuration, the configuration including the inclined single-point insulator type gas circuit breaker having the current detection function, the disconnector, and the capacitor type voltage transformer is provided in substantially the same installation space as in the fourth embodiment. Yes, conventional circuit breakers, current transformers,
Compared to installing a disconnector and a capacitor-type voltage transformer separately, installation space for current transformers and capacitor-type voltage transformers is not required, the distance between devices is reduced, installation space is reduced, and The effect of reducing the site cost of the place is great, and the effect of reducing the cost of the disconnector can be obtained.

Embodiment 7 Embodiment 7 is shown in FIG.
The configuration comprising the circuit breaker, current transformer and disconnector of (a)
An optical current transformer with a current detection function is built-in, and two interrupting parts are arranged in a V-shape in an inclined manner and are integrated with a disconnector using a Y-type two-point insulator type gas circuit breaker supported by a supporting insulator. This is the configuration of the aerial insulated switchgear arranged on the common gantry. Embodiment 7
FIG. 8 shows a side view of the configuration of FIG. In the figure, reference numeral 91 denotes a Y-shaped two-point insulator type gas circuit breaker, in which a fixed contact, a movable contact, an insulating nozzle and the like are housed in a porcelain tube, and two breaking portions 91a and 91b are arranged in a V-shape. The operation rod and the like are supported by a support portion 91c accommodated in a support insulator tube, and are disposed at ends of the blocking portions 91a and 91b, the supporting portion 91c, the intermediate supporting portion 91d, and the blocking portions 91a and 91b. It is composed of upper terminals 91e and 91f and an operating mechanism 91g arranged at the lower end of the support portion 91c. The optical current transformer 32 is built in the middle of the interruption portion 91a or 91b as a current detection function. 91M is an inspection space for inspecting the blocking portions 91a and 91b.

The disconnecting switch has a structure in which the disconnecting switch 33 shown in FIG. 2 of the first embodiment is provided. Reference numeral 94 denotes a connection conductor that connects the upper terminal 91f of the cutoff portion 91b on the disconnector 33 side of the Y-shaped two-point insulator gas disconnector 91 and the movable contact portion 33b of the disconnector 33. 95 is a common stand.

In this configuration, a Y-shaped two-point insulator gas breaker 91 is disposed at one end of a common base 95, and the Y-shaped two-point insulator gas breaker 91 is arranged to be inclined on the disconnector side. Cut-off part 9
A disconnector 33 is disposed in the vicinity of 1b, and the insulation distance between the three phases is the same as in the first to sixth embodiments. Intermediate support part 9
The aerial insulated switchgear is arranged at the minimum necessary insulation distance that can withstand the voltage applied between the phases in the 1d energized state.

In the air insulated switchgear configured as described above, the Y-type two-point insulator gas circuit breaker 91 incorporating the optical current transformer 32 and the disconnector 33 can be disposed on the common mount 95 in close proximity. The installation area can be reduced as compared with the case where the Y-type two-point insulator type gas circuit breaker, current transformer, and disconnector are individually installed, and the effect of reducing the land cost of the substation can be obtained. Breaking part is V
The same effect can be obtained not only in the shape of a letter but also in the case of a two-point breaker arranged linearly.

Embodiment 8 FIG. Embodiment 8 is similar to FIG.
The configuration consisting of the circuit breaker, current transformer, disconnector and lightning arrester of (b) is integrated with the disconnector and lightning arrester using the Y-type two-point insulator gas circuit breaker equipped with a current detection function on a common mount. This is the configuration of the air insulated switchgear provided. FIG. 9 shows the configuration of the eighth embodiment. 95 is a common stand. This configuration is obtained by combining the Y-type two-point insulator gas circuit breaker 91 of the seventh embodiment with the disconnector 43 in which the lightning arrester 44 is disposed on the supporting insulator portion shown in FIG. It is arranged.

With this configuration, an air-insulated switchgear with the lightning arrester 44 added to the same common base 95 as in the seventh embodiment can be constructed, and a Y-type two-point insulator gas breaker, current transformer, disconnector In addition, the installation space can be significantly reduced as compared with the case where the lightning arresters are individually installed, and the land cost of the substation can be reduced. Also in this case, the same effect can be obtained even in the case of a two-point breaker in which the cutoff portions are arranged linearly.

Embodiment 9 FIG. Embodiment 9 corresponds to FIG.
The configuration comprising the circuit breaker, current transformer, disconnector, and capacitor-type voltage transformer of (c) is replaced with a disconnector, capacitor-type voltage transformer using a Y-type two-point insulator-type gas circuit breaker having a current detection function. This is the configuration of the aerial insulated switchgear integrated with the vessel and arranged on the common mount. FIG. 10 shows the configuration of the ninth embodiment. 96 is a common stand. This configuration corresponds to the seventh embodiment.
The Y-type two-point insulator gas circuit breaker 91 and the disconnector 53 in which the insulator type capacitor 54 of the capacitor type voltage transformer is disposed on the supporting insulator shown in FIG. It is arranged.

With this configuration, an aerial insulated switchgear including the capacitor type voltage transformer 54 can be formed on the same common base 96 as in the seventh embodiment, and a Y-type two-point insulator type gas circuit breaker, The installation space can be greatly reduced as compared with the case where the current switch, the disconnector and the lightning arrester are separately installed, and the land cost of the substation can be reduced. Also in this case, the same effect can be obtained even in the case of a two-point breaker in which the cutoff portions are arranged linearly.

Embodiment 10 FIG. As a configuration of a power receiving unit, a transformer unit, or a branch unit connected to a primary bus or a secondary bus of a substation, a configuration in which a disconnector is installed on a bus side is as shown in a single line diagram in FIG. There are various configurations. 11, the circuit breaker 21, the current transformer 22, and the lightning arrester 24 are the same as those in FIG. 2
6 is a first disconnector, 27 is a second disconnector, 28 is an arrester, and 29 is a capacitor type voltage transformer. FIG.
11A shows a configuration in which a current transformer 22 is arranged on one side of a circuit breaker 21 and a first disconnector 26 and a second disconnector 27 are arranged on both sides of the current transformer 22, and FIG. ), A lightning arrester 28 and a second disconnector 27 are provided at the end of the first disconnector 26.
11 (c) shows a configuration in which a capacitor type voltage transformer 29 and a second disconnector 27 are connected to one end of a first disconnector 26 having the configuration of FIG. 11 (a). FIG. 11D shows a configuration in which a lightning arrester 24 is connected to the end.
(A) The lightning arrester 28 and the capacitor type voltage transformer 29 are connected to one end of the first disconnector 26 of the configuration, and the lightning arrester 24 is connected to the end of the second disconnector 27.

In the tenth embodiment, the configuration of the first disconnector, circuit breaker, current transformer and second disconnector shown in FIG. This is a configuration of an aerial insulated switchgear that is disposed on a common mount integrally with a first disconnector and a second disconnector using a circuit breaker. A side view and a plan view of the configuration of the tenth embodiment are shown in FIG. In the figure, a vertical single-point insulator type gas circuit breaker 31 is the same as that of the first embodiment.

Reference numeral 106 denotes a first disconnector. A movable contact portion 106b is mounted on the upper portion of the movable-side support insulator 106a, and a disconnector blade 106c is mounted. A disconnector blade 106c is mounted on the side of the movable-side support insulator 106a. A drive insulator 106d for vertically moving the drive insulator 106d is disposed, a drive mechanism 106e is provided at a lower end of the drive insulator 106d, and a fixed contact 1
In this configuration, a fixed-side support insulator 106h to which 06f and a disconnector terminal 106g are attached is arranged, and the disconnector blade 106c is rotated upward to open the pole and is a vertically single-point disconnector.

Reference numeral 107 denotes a second disconnecting switch, which has the same configuration as the disconnecting switch 33 of the first embodiment shown in FIG. 103
Is a connection conductor connecting between the movable contact portion 106b of the first disconnector 106 and the upper terminal 31d of the vertical single-point insulator gas circuit breaker 31, and 104 is a vertical single-point insulator gas breaker 3
This is a connection conductor connecting between the first lower terminal 31c.
Reference numeral 105 denotes a common stand on which the first disconnector 106, the vertical one-point insulator type gas circuit breaker 31 and the second disconnector 107 are disposed. The configuration for one phase described above is configured into three phases of a U phase, a V phase, and a W phase as shown in the plan view of FIG.

In this configuration, a first disconnector 106 is provided at one end of a common base 105, a vertical one-point insulator gas breaker 31 is provided at the center, and a second disconnector 107 is provided at the other end. The insulation distance C between the lower terminal 31c of the single-point insulator gas circuit breaker 31 and the upper part of the drive insulator 106d of the first disconnector 106, and the lower terminal 31c of the vertical single-point insulator gas circuit breaker 31 In the open state of the second disconnector 107, the insulation distance A between the disconnector blade 33c and the tip of the disconnector blade 33c is the minimum necessary to withstand the voltage applied between the poles when the vertical single-point insulator gas circuit breaker 31 is opened. As the insulation distance, the movable support insulator 106 of the first disconnector 106 and the second disconnector 10
7 and the first disconnector 10
The fixed-side support insulator 106h is disposed at the closing position of the disconnector blade 106c of No. 6, and the fixed-side support 33f and the disconnecting terminal 33g are mounted at the closing position of the disconnector blade 33c of the second disconnector 107. The insulator 33h is arranged, and the insulation distance B between the three phases is the lower terminal 31c of the vertical single-point insulator gas circuit breaker 31, which is the shortest between the phases.
The aerial insulated switchgear is arranged at the minimum necessary insulation distance that can withstand the voltage applied between the phases when the portions are energized.

In the air insulated switchgear configured as described above, the first disconnector 106 and the second disconnector 107 are each configured as a vertical disconnector, so that the inter-phase distance can be set shorter. The disconnector 106, the vertical single-point insulator type gas circuit breaker 31 and the second disconnector 107 are also arranged on the common stand 105 with a reduced inter-device distance. The first disconnector, the vertical single-point insulator The installation area is reduced as compared with a case where the gas circuit breaker, the current transformer, and the second disconnector are separately installed, and the effect of reducing the land cost of the substation is obtained.

Embodiment 11 FIG. Embodiment 11 corresponds to FIG.
The configuration in which the first disconnector, circuit breaker, current transformer, second disconnector, and lightning arrester at both ends of 1 (b) are connected by using a vertical single-point insulator type gas circuit breaker having a current detection function. The lightning arrester, the first disconnector, the second disconnector, and the lightning arrestor are integrated into an air-insulated switchgear. FIG. 14 shows a side view of the configuration of the eleventh embodiment. Figure 1 is a plan view
3 and is omitted. In the figure, a vertical single-point insulator gas circuit breaker 31, a connection conductor 103, a connection conductor 10
4 and the common base 105 are the same as those in the tenth embodiment.

Reference numeral 116 denotes a first disconnector, which includes a movable support insulator 106a, a movable contact portion 106b, and a disconnector blade 1
06c, drive insulator 106d, drive mechanism 106e, fixed contact 106f and disconnector terminal 106g are the same as those shown in FIG. 12 of the tenth embodiment.
A fixed-side contact 106f and a disconnector terminal 10f are provided on the upper portion of the fixed-side support insulator 106h of the first disconnector 106.
In this configuration, a surge arrester 118 equipped with 6 g is arranged. 1
Reference numeral 17 denotes a second disconnector, which has the same configuration as the disconnector 43 in which the lightning arrester 44 is arranged on the supporting insulator portion shown in FIG. 3 of the second embodiment. 105 is a common stand.

As described above, with the configuration in which the lightning arresters 118 and 44 are arranged at the positions where the respective disconnector blades of the first disconnector 116 and the second disconnector 117 are respectively applied, the configuration of the tenth embodiment is achieved. In addition, the structure in which the lightning arresters are connected to both ends can be arranged on the same common base 105 as in the tenth embodiment, and the lightning arrester, the first disconnector,
The installation area is greatly reduced compared to the case where the vertical single-point insulator gas circuit breaker, current transformer, second disconnector, and lightning arrester are separately installed, and the effect of reducing the land cost of the substation is obtained. Can be

Embodiment 12 FIG. Embodiment 12 corresponds to FIG.
1 (c) is a configuration in which a capacitor type voltage transformer, a first disconnector, a circuit breaker, a current transformer, a second disconnector, and a lightning arrester are connected, and a vertical one-point insulator type gas interrupter having a current detection function is provided. The device is integrated with a capacitor type voltage transformer, a lightning arrester, a first disconnector, a second disconnector, and a lightning arrestor, and is arranged on a common mount to constitute an air-insulated switchgear. An air-insulated switchgear shown in FIG. 11C is configured by disposing an insulator-type capacitor of a capacitor-type voltage transformer in a portion of the first disconnector 116 of the eleventh embodiment where the surge arrester 118 is disposed. FIG. 15 shows the configuration. In the figure, a vertical single-point insulator type gas circuit breaker 31, a second disconnector 117,
The lightning arrester 44 and the connection conductors 103 and 104 are the same as those of the eleventh embodiment.
Are the same as those shown in FIG. Reference numeral 126 denotes a first disconnector, which includes a movable support insulator 106a and a movable contact portion 106.
b, disconnector blade 106c, drive insulator 106d, drive mechanism 106e, fixed contact 106f, and disconnector terminal 106g are the same as those shown in FIG. 12 of the tenth embodiment, and the first disconnection of the tenth embodiment In this configuration, an insulator-type capacitor 129 of a capacitor-type voltage transformer having a fixed-side contact 106f of a disconnector and a disconnector terminal 106g mounted on the upper portion of a fixed-side support insulator 106h of the switch 106 is arranged.

With this configuration, in addition to the configuration of the tenth embodiment, the configuration in which the insulator type capacitor 129 of the capacitor type voltage transformer is connected to one end and the lightning arrester 44 is connected to the other end is almost the same as that of the tenth embodiment. In the case where the capacitor type voltage transformer, the first disconnector, the vertical single-point insulator type gas circuit breaker, the current transformer, the second disconnector, and the lightning arrester can be installed on the same common stand 125. The installation area can be greatly reduced as compared with the above, and the effect that the land cost of the substation can be reduced can be obtained.

Embodiment 13 FIG. Embodiment 13 corresponds to FIG.
1 (d), a lightning arrester and a capacitor type voltage transformer are connected to one end of the first disconnector, circuit breaker, current transformer, second disconnector and first disconnector, and one end of the second disconnector A lightning arrestor is connected to the cradle, and the configuration is arranged on a common gantry to form an air-insulated switchgear.

The zinc oxide element of the surge arrester is an insulator when a normal line voltage is applied, electrodes are formed on both end faces, there is a capacitance between the electrodes, and the zinc oxide element When the capacitors are stacked, the capacitance is connected in series, and a capacitor-type voltage transformer can be constructed by extracting the divided voltage from the upper and lower electrodes of the bottom zinc oxide element by connecting leads. It is.

The thirteenth embodiment differs from the eleventh embodiment in that a lightning arrester provided with a voltage detecting function is arranged at the fixed-side support insulator of the first disconnector 116 of FIG.
The circuit of (d) is configured as an air-insulated switchgear. FIG. 16 shows the configuration of a surge arrester having a voltage detection function.
In the figure, 138 is an arrester with a voltage detection function,
Insulator tube 138a, zinc oxide element 138b, zinc oxide element 138c for partial pressure, upper cover 138d, lower cover 138e, upper cover 138f, lower cover 138g, zinc oxide element 13 for partial pressure
8c, a connection lead 138h for detecting a voltage between both ends, a voltage dividing terminal 138i, a signal processing unit 138j, and a ground lead 138.
k, a ground terminal 138m, and a frame 138n.

When the circuit voltage is applied to the surge arrester 138 having a voltage detection function, which is formed by stacking zinc oxide elements, the stacked zinc oxide elements have a configuration in which capacitors are connected in series. From the connection lead 138h for detecting the voltage between both ends of the zinc element 138c, a divided voltage proportional to the circuit voltage can be detected. Since the capacitance of the zinc oxide element 138c is small, it is detected as a voltage signal by the signal processing unit 138j.

By connecting the lightning arrester having the voltage detecting function configured as described above to one end of the first disconnector of the eleventh embodiment, an air insulation provided with the voltage detecting function shown in FIG. A switchgear can be configured. The structure of the thirteenth embodiment is exactly the same as that of the eleventh embodiment shown in FIG. In addition to the configuration of the eleventh embodiment, the first disconnector has a lightning arrester and a voltage detection function on one end side of the first disconnector.
0 and 11 can be arranged on the same common base 105,
The installation area is smaller than when installing a capacitor type voltage transformer, surge arrester, first disconnector, vertical single-point insulator gas breaker, current transformer, second disconnector and lightning arrester individually. Thus, the effect that the land cost of the substation can be greatly reduced can be obtained.

Embodiment 14 FIG. Embodiment 14 corresponds to FIG.
The configuration including the first disconnector, the circuit breaker, the current transformer, and the second disconnector shown in FIG. 1A is the same as that of the fourth embodiment, except that the inclined single-point insulator type gas circuit breaker having the current detection function is used. The first disconnecting switch and the second disconnecting switch are integrated with each other and disposed on a common frame to form an air-insulated switchgear. FIG. 17 shows a side view of the configuration. In the figure, reference numeral 61 denotes a one-point inclined insulator type gas circuit breaker, which is the same as that shown in FIG. 5 of the fourth embodiment. 145 is a common stand. 14
Reference numeral 6 denotes a first disconnector. The movable contact portion 146b is attached to the upper terminal 61d of the inclined single-point insulator gas circuit breaker 61, and the disconnector blade 146c is attached thereto.
B, a drive insulator 146d and a drive mechanism 146e are arranged, and a fixed-side contact insulator 146f and a fixed-side support insulator 146h having a disconnector terminal 146g mounted on an upper portion are arranged at a closing position of the disconnector blade 146c. . 14
Reference numeral 7 denotes a second disconnector, which has the same configuration as the disconnector 63 of FIG. 5 of the fourth embodiment. The inter-phase distance is determined as the insulation distance B between the outer diameter portions of the lower terminal 61c of the inclined single-point insulator gas circuit breaker 61, and is the same distance as that in FIG.

In this configuration, the disconnector blade 146c of the first disconnector 146 is attached to the upper terminal 61d of the insulator type gas circuit breaker 61, and the disconnector blade 63c of the second disconnector 147 is attached to the inclined single point disconnector. Insulator type gas circuit breaker 61
Of the first disconnector 146 and the second disconnector 147, the distance between the devices is short, and the common mount 145 is small. The installation space can be greatly reduced, which has the effect of greatly reducing land costs compared to the case where the first disconnector, circuit breaker, current transformer and second disconnector are individually installed. .

Embodiment 15 FIG. Fifteenth Embodiment FIG.
The configuration in which the first disconnector, the circuit breaker, the current transformer, the second disconnector and the lightning arrester connected to both ends of the first disconnector, the inclined single-point insulator type gas circuit breaker having the current detection function of FIG. The first disconnecting switch, the second disconnecting switch and the lightning arrestor are integrally disposed on a common mount to form an air-insulated switchgear. FIG. 18 shows the configuration of the fifteenth embodiment. In the figure, reference numeral 61 denotes a one-point inclined insulator type gas circuit breaker, which is the same as that shown in FIG. 17 of the fourteenth embodiment. Reference numeral 156 denotes a first disconnector, which is the same lightning arrester as that arranged on the fixed side of the first disconnector 116 of FIG. 14 of the eleventh embodiment at the portion of the fixed-side support insulator 146h of FIG. 17 of the fourteenth embodiment. 118 is arranged. Reference numeral 157 denotes a second disconnector, which has a configuration in which the same lightning arresters 44 as those disposed on the fixed side of the second disconnector 117 in FIG. 14 are arranged. The other configuration is the same as the configuration in FIG.

With this configuration, an air-insulated switchgear in which lightning arresters are connected to respective ends of the first disconnector and the second disconnector of the circuit of FIG.
Therefore, there is an effect that the equipment cost of the disconnector can be reduced, and the land cost can be greatly reduced.

Embodiment 16 FIG. Embodiment 16 is different from FIG.
The configuration in which the capacitor type voltage transformer, the first disconnector, the circuit breaker, the current transformer, the second disconnector, and the lightning arrester of FIG. The aerial insulated switchgear is constructed by integrally disposing the capacitor type voltage transformer, the first disconnector, the second disconnector, and the lightning arrester on a common mount using a switch. FIG. 19 shows the configuration of the sixteenth embodiment. In the figure, reference numeral 61 denotes an inclined single-point insulator type gas circuit breaker, which is shown in FIG.
Are the same as those shown in FIG. Reference numeral 166 denotes a first disconnector, which is a fixed-side support insulator 146h in FIG.
Is replaced by an insulator type capacitor 129 of the capacitor type voltage transformer of FIG. Fifteen
Reference numeral 7 denotes a second disconnecting switch, which has a configuration in which the same lightning arrester 44 as that shown in FIG. The other configuration is the same as the configuration in FIG.

With this configuration, a capacitor type voltage transformer is connected to one end of the first disconnector of the circuit shown in FIG. 11C, and an arrester is connected to one end of the second disconnector. The insulated switchgear can be arranged and configured on the same common base as in FIG. 17 of the fourteenth embodiment, which has the effect of reducing the equipment cost of the disconnector and greatly reducing the site cost.

Embodiment 17 FIG. Embodiment 17 is different from FIG.
The configuration in which the lightning arrester and the capacitor type voltage transformer are connected to one end to which the first disconnector, the circuit breaker, the current transformer, and the second disconnector of FIG. A lightning arrester equipped with a voltage detecting function, a first disconnector, a second disconnector, and a lightning arrestor equipped with a voltage detecting function using an inclined single-point insulator gas circuit breaker equipped with a detecting function This constitutes an insulated switchgear. This configuration corresponds to the first embodiment.
The lightning arrester 138 having the voltage detecting function shown in the thirteenth embodiment is arranged in place of the lightning arrester 118 arranged on the fixed-side support insulator of the first disconnector 156 of the construction of FIG. is there. Other parts are the same as those in the configuration of FIG. 18 of the fifteenth embodiment, and the drawings are omitted.

With this configuration, the function of the capacitor type voltage transformer and the surge arrester are connected to one end of the first disconnector of the circuit of FIG. 11D, and the surge arrester is connected to one end of the second disconnector. The intermediate insulated switchgear can be arranged and configured on the same common base as in FIG. 17 of the fourteenth embodiment, and the installation space is greatly reduced as compared with a case where each device is individually installed. This has the effect of significantly reducing costs.

Embodiment 18 FIG. Embodiment 18 is different from FIG.
The configuration including the first disconnector, the circuit breaker, the current transformer, and the second disconnector shown in FIG. 1 (a) is first modified by using a Y-type two-point insulator gas breaker having a current detection function. It is the structure of the air-insulated switchgear provided integrally with the disconnector and the second disconnector on the common mount. FIG. 20 shows a side view of the configuration of the eighteenth embodiment. In the figure, a Y-shaped two-point insulator gas circuit breaker 91 is the same as that of the seventh embodiment.

The first disconnector 106 and the second disconnector 107
Are the same as those shown in FIG. 12 of the tenth embodiment.
Reference numeral 94 denotes a connection conductor connecting between the movable contact portion 33b of the second disconnector 107 and one terminal 91f of the Y-shaped two-point insulator gas circuit breaker 91, and 174 denotes a movable contact of the first disconnector 106. This is a connection conductor for connecting between the portion 106b and the other terminal 91e of the Y-shaped two-point insulator gas circuit breaker 91.
175 is a common stand on which the first disconnector 106, the vertical one-point insulator gas breaker 31 and the second disconnector 107 are disposed.

In this configuration, the first disconnector 106, the Y-shaped two-point insulator type gas circuit breaker 91, and the second disconnector 107 are arranged on the common mount 175 with the distance between the devices shortened. The installation space is reduced compared to the case where the first disconnector, vertical one-point insulator gas circuit breaker, current transformer, and second disconnector are installed individually, and the substation site cost is reduced. The effect that can be obtained is obtained. Also in this case, the same effect can be obtained even in the case of a two-point breaker in which the cutoff portions are arranged linearly.

Embodiment 19 FIG. Nineteenth Embodiment FIG.
The first disconnector, circuit breaker, current transformer, second disconnector, and lightning arrestor connected to both ends of 1 (b) are connected to a Y-type two-point insulator gas circuit breaker having a current detection function. And the lightning arrestor, the first disconnector, the second disconnector, and the lightning arrestor are integrally disposed on a common mount to form an air-insulated switchgear. FIG. 21 shows a side view of the configuration of the nineteenth embodiment. In the figure, a Y-shaped two-point insulator gas circuit breaker 91 is the same as that of the seventh embodiment shown in FIG.

The first disconnector 116 and the second disconnector 117
Is the same as that shown in FIG. 14 of the eleventh embodiment in which the lightning arresters 118 and 44 are arranged on the fixed-side supporting insulator. Connection conductors 94 and 174 and common frame 175 are the same as those shown in the eighteenth embodiment.

In this configuration, the first disconnector 116, the Y-type two-point insulator gas breaker 91, and the second disconnector 117 are arranged on the common mount 175 with a shorter distance between the respective devices. The installation space is reduced compared to the case where the lightning arrester, the first disconnector, the vertical single-point insulator gas circuit breaker, the current transformer, the second disconnector and the lightning arrester are individually installed,
The effect that the land cost of the substation can be reduced can be obtained. Also in this case, the same effect can be obtained even in the case of a two-point breaker in which the cutoff portions are arranged linearly.

Embodiment 20 FIG. Embodiment 20 is different from FIG.
The configuration in which the capacitor type voltage transformer, the first disconnector, the circuit breaker, the current transformer, the second disconnector, and the lightning arrester of FIG. 1 (c) are connected is a Y-type two-point insulator having a current detection function. A gas circuit breaker, a capacitor type voltage transformer, a lightning arrestor, a first disconnector, a second disconnector, and a lightning arrestor are integrated with each other and arranged on a common mount to form an air-insulated switchgear.

FIG. 22 shows a side view of the structure of the twentieth embodiment. In the figure, a Y-type two-point insulator gas circuit breaker 91 is the same as that shown in FIG. 20 of the eighteenth embodiment, and a first disconnection in which an insulator type capacitor 129 of a capacitor type voltage transformer is arranged on a fixed side. The second disconnector 117 in which the switch 126 and the lightning arrester 44 are arranged on the fixed side is the same as that shown in FIG. 15 of the twelfth embodiment. Connection conductors 94 and 174 are the same as those shown in the eighteenth embodiment.

With this structure, in addition to the structure of the eighteenth embodiment, the structure in which the insulator type capacitor 129 of the capacitor type voltage transformer is arranged at one end and the lightning arrester 44 is arranged at the other end is almost the same as that of the eighteenth embodiment. When the capacitor type voltage transformer, the first disconnector, the vertical single-point insulator type gas circuit breaker, the current transformer, the second disconnector and the lightning arrester can be installed on the same common base 195. The installation area can be greatly reduced as compared with the above, and the effect that the land cost of the substation can be reduced can be obtained. Also in this case, the same effect can be obtained even in the case of a two-point breaker in which the cutoff portions are arranged linearly.

Embodiment 21 FIG. Embodiment 21 corresponds to FIG.
1 (d), a lightning arrester and a capacitor type voltage transformer are connected to the ends of the first disconnector, circuit breaker, current transformer, second disconnector and first disconnector, and the second disconnector The components of the circuit in which the lightning arrester is connected to the end of the unit are integrated and disposed on a common mount to form an air-insulated switchgear. The configuration of the twenty-first embodiment is different from that of the nineteenth embodiment in that a disconnecting blade 106c of the first disconnecting switch 116 of FIG. In the thirteenth embodiment, a fixed contact 106f of a first disconnector 116 and a disconnector terminal 106g are attached to an upper part of a lightning arrester 138 having a voltage detecting function shown in FIG.

Since the lightning arrester 138 having the voltage detecting function is arranged on the fixed side of the first disconnector 116, the first disconnector 116, the Y-shaped two-point insulator gas breaker 91, A lightning arrester provided with a voltage detecting function of a capacitor type voltage transformer on one end side in a space where the second disconnector 117 is installed,
A configuration in which an arrester is arranged on the other end side is obtained, and a capacitor type voltage transformer, an arrester, a first disconnector, a Y-type two-point insulator gas breaker, a current transformer, a second disconnector and an arrester are provided. The effect of reducing the installation area is greater than when installing individually, and the land cost of the substation can be greatly reduced. Also in this case, the same effect can be obtained even in the case of a two-point breaker in which the cutoff portions are arranged linearly.

Embodiment 22 FIG. The vertical single-point insulator type gas circuit breaker or the inclined single-point insulator type gas circuit breaker has a configuration in which a blocking portion is disposed at an upper portion, and a supporting portion that supports the blocking portion insulated from the ground is disposed at a lower portion. The inside of the gas circuit breaker is filled with a high-pressure insulating gas, and the pressure is further increased when the gas circuit is interrupted. In the case of a porcelain porcelain insulator, the larger the diameter, the thicker the wall and the greater the strength.However, if an optical current transformer is built in the cutoff section, the diameter becomes larger, and the porcelain porcelain insulator becomes heavier and becomes heavier. In order to ensure the seismic strength of the circuit breaker, it is necessary to use a supporting insulator tube with increased strength, and there is a problem that the circuit breaker becomes large in size and heavy.

The twenty-second embodiment has a structure in which the insulator tube for accommodating the interrupter of the circuit breaker is reduced in weight. For example, FIG. 23 shows a configuration for reducing the weight of the insulator tube of the vertical single-point insulator gas circuit breaker. In the figure, reference numeral 201 denotes a cut-off portion insulator tube, an inner peripheral portion of which is formed of FRP, and an outer peripheral portion of which is formed of a weather-resistant resin with folds. 202, a breaking unit for opening and closing the current; 203, a driving mechanism for opening and closing the breaking unit; 204, a connection conductor between the breaking unit 202 and the upper part;
Reference numeral 5 denotes a closing resistor, 206 denotes a lower terminal, 207 denotes an upper terminal, and the cutoff unit 200 includes 201 to 207. 211 is a support insulator for supporting the interrupting portion, 212 is an insulated operating rod for transmitting an operating force to the interrupting portion in an insulated state to the interrupting portion, 213 is a lower flange, 214 is an operating mechanism, 215
Denotes an operation box, and the support portion 210 is constituted by 211 to 215. Reference numeral 221 denotes a detection unit of the optical current transformer that detects a voltage signal proportional to a magnetic field caused by a current flowing through the cutoff unit.
Is an optical fiber for transmitting the detected voltage signal, 223 is a signal converter for converting the optical signal into an electric signal, and the current detecting means 220 is composed of 221 to 223.

Since the insulating portion 201 is made of a weather-resistant resin insulator reinforced with FRP, the diameter of the insulating portion 200 can be reduced and the weight can be reduced.
When applied to the circuit breaker of the air-insulated switchgear of No. 21, the air-insulated switchgear contributes to a reduction in size.

[0086]

According to a first aspect of the present invention, there is provided an air-insulated switchgear having a vertical single-point insulator type gas circuit breaker having a current detection function, and an upper terminal of the vertical single-point insulator type gas circuit breaker. The movable support insulator and the drive insulator to which the movable contact and the disconnector blade are attached are located at a predetermined insulating distance from the tip of the disconnector blade in the extreme vertical state, and the disconnector blade Since the fixed position support insulator with the fixed-side contact attached to the loading position is arranged on a common stand with a vertical single-point disconnector, the circuit breaker,
The installation space can be reduced as compared with the case where the current transformer and the disconnector are individually installed, and the effect of reducing the land cost of the substation can be obtained.

An air-insulated switchgear according to a second aspect of the present invention is provided with a current detecting function, and has a sloped single-point insulator type gas circuit breaker in which a cut-off section is arranged in an inclined manner. A movable contact, a disconnector blade, and one end of a drive insulator are attached to the lower terminal in the middle of the above, and a fixed-side support insulator with a fixed-side contact attached at the throw-in position of the disconnector blade. Is arranged on the common stand, the distance between the devices is eliminated, the common stand becomes smaller, the installation space is reduced as compared with the case of claim 1, and the land cost of the substation is greatly reduced. Thus, the effect of reducing the cost of the disconnector can be obtained.

The air-insulated switchgear according to claim 3 of the present invention has a current detecting function, and has a two-point cut-off type in which two cut-off portions are arranged in a V-shape or a straight line and supported by a support insulator. A gas circuit breaker and a movable support insulator and a drive insulator to which a movable contact and a disconnector blade are attached are disposed in the vicinity of one terminal of the two-point insulator gas circuit breaker,
A vertical single-point disconnector with a fixed-side support insulator with a fixed-side contact attached to the disconnecting blade insertion position is arranged on a common mount, so when installing each device individually In comparison, the installation area is reduced, and the effect of reducing the land cost of the substation is obtained.

The air-insulated switchgear according to a fourth aspect of the present invention is characterized in that the disconnector blades of the vertical single-point disconnector of the first to third aspects have a fixed position on the upper side of the disconnector blade. Since the lightning arrester is equipped with contacts, the distance between devices between the circuit breaker and disconnector is shortened, equipment costs are reduced, installation space is reduced, and land substation costs are reduced. Can be

The air-insulated switchgear according to a fifth aspect of the present invention is characterized in that the disconnecting switch blade of the vertical one-point disconnection switch of the configuration of the first to third aspects is provided at an upper position of the disconnecting switch fixed side. Since the insulator type capacitor of the capacitor type voltage transformer with contacts is used, the distance between the circuit breaker and disconnector is shortened, the equipment cost is reduced, the installation space is reduced, and the land cost of the substation is reduced. The effect of reduction is obtained.

An air-insulated switchgear according to a sixth aspect of the present invention comprises a vertical single-point insulator gas circuit breaker having a current detecting function, and a lower terminal at an intermediate portion of the vertical single-point insulator gas breaker. A fixed-side support insulator having a movable-side support insulator and a drive insulator having a movable contact portion and a disconnector blade attached thereto at a position separated by a predetermined insulation distance, and a fixed-side contactor being attached at a closing position of the disconnector blade. A first disconnector with a vertical one-point disconnection, and a predetermined insulation distance between the upper terminal of the vertical one-point insulator gas circuit breaker and the tip of the vertical disconnector blade at the time of opening. A movable single-sided support insulator and a drive insulator having a movable contact portion and a disconnector blade attached thereto are arranged at a position, and a fixed-side support insulator having a fixed-side contact attached thereto is arranged at a closing position of the disconnector blade. two Since a structure which is disposed a disconnector on a common frame, floor space as compared with the case of installing each device individually is reduced, the effect of reducing the land cost of the substation is obtained.

The air-insulated switchgear according to claim 7 of the present invention has a current detecting function, and has an inclined single-point insulator type gas circuit breaker in which an interruption portion is inclined, and the inclined single-point insulator type gas circuit breaker. The movable contact part, the disconnector blade and one end of the drive insulator are attached to the terminal part on the tip side, and the fixed-side support insulator with the fixed-side contact attached at the insertion position of the disconnector blade. A fixed contact with a movable contact part, one end of a disconnector blade and a drive insulator attached to the middle terminal part of the disconnector and the inclined one-point disconnection gas circuit breaker, and a fixed contact attached to the insertion position of the disconnector blade Since the configuration is such that the vertical disconnecting second disconnector having the supporting insulators disposed thereon is disposed on the common mount, the equipment costs of the first disconnector and the second disconnector are reduced, and the distance between the devices is reduced. The common stand is small No longer, installation space is reduced by a large margin, as compared with the case of installing each device individually, the effect of greatly reducing the land cost.

The air-insulated switchgear according to claim 8 of the present invention has a current detecting function, and is a two-point insulator type in which two breaking portions are arranged in a V-shape or a straight line and supported by a supporting insulator. A gas breaker and a movable support insulator and a drive insulator having a movable contact portion and a disconnector blade attached thereto are disposed near one end side terminal of the two-point insulator gas breaker. A vertical disconnecting first disconnector having a fixed-side support insulator having a fixed-side contact attached thereto, and a movable contact portion and a disconnector in proximity to the other end side terminal of the two-point disconnected insulator type gas circuit breaker. A movable single-sided support insulator and a drive insulator to which a switch blade is attached are arranged, and a fixed single-sided support insulator to which a fixed-side contact is attached is arranged at a closing position of the disconnector blade. It is configured to be installed on a common frame Since, the installation space compared with the case of installing each device individually is reduced, the effect of reducing the land cost of the substation is obtained.

According to a ninth aspect of the present invention, there is provided an air-insulated switchgear according to any one of the sixth to eighth aspects, wherein each of the first disconnector and the second disconnector is provided with a disconnecting blade. Since the lightning arresters with the fixed contacts of the disconnecting switch attached to the upper part are arranged, the installation space is reduced and the land cost of the substation can be reduced compared to the case where each device is installed individually. The effect is obtained.

According to a tenth aspect of the present invention, an air-insulated switchgear according to the tenth aspect of the present invention has a structure in which the disconnector blade of the first disconnector of the configuration of the sixth to eighth aspects has an upper portion on the fixed side of the disconnector. Arrange the insulator type capacitor of the capacitor type voltage transformer with the contact attached, and place the lightning arrester with the fixed side contact of the disconnector mounted on the upper part at the insertion position of the disconnector blade of the second disconnector. With this configuration, in addition to the configuration of claim 8, a configuration in which a capacitor type voltage transformer is arranged on one end side and a lightning arrester is arranged on the other end side can be arranged on the same common base as in claim 8. The installation area is greatly reduced as compared with the case where each device is installed individually, and the effect of reducing the land cost of the substation can be obtained.

According to an eleventh aspect of the present invention, there is provided the air-insulated switchgear according to the sixth aspect of the present invention, wherein the disconnector blade of the first disconnector is provided with a zinc oxide element inside the insulator tube. The zinc oxide element of the lowermost layer is used as a voltage dividing element, and a current detecting function is provided for detecting a voltage between upper and lower ends of the voltage dividing element and converting the voltage into a voltage signal. A lightning arrester to which a disconnector is attached is arranged, and a lightning arrester to which a fixed-side contact of the disconnector is attached at an upper position is disposed at a position where the disconnector blade of the second disconnector is turned on. In addition to the above configuration, a configuration provided with a lightning arrester and a voltage detection function on one end side of the first disconnector is disposed on the same common base as in claim 9, and is installed compared to a case where each device is individually installed. The area is smaller and the substation land costs can be significantly reduced. Results can be obtained.

According to a twelfth aspect of the present invention, there is provided an air-insulated switchgear according to the first or sixth aspect of the present invention, comprising:
Since the inner peripheral portion is formed of an FRP insulating member and the outer peripheral portion is formed of a composite insulator formed of a weather-resistant resin, the cut-off portion is reduced in weight and the outer dimensions of the air-insulated switchgear can be reduced. .

An aerial insulated switchgear according to a thirteenth aspect of the present invention is provided with an insulated single-point insulator type gas circuit breaker having a current detecting function according to the second or seventh aspect, wherein the cutoff portion is arranged in an inclined manner. The insulation part is made of an FRP insulating member on the inner periphery and a composite insulator made of weather-resistant resin on the outer periphery. Can be reduced.

An aerial insulated switchgear according to a fourteenth aspect of the present invention is provided with the current detecting function according to the third or eighth aspect, and the two interrupting portions are arranged and supported in a V-shape or linear shape. The insulation tube of the two-point insulator gas circuit breaker supported by the insulator is made of a composite insulator whose inner periphery is made of FRP insulating material and whose outer periphery is made of weather-resistant resin. The weight can be reduced, and the size can be reduced as an air-insulated switchgear.

[Brief description of the drawings]

FIG. 1 is a single-line diagram in a case where a disconnector is connected to only one of an air-insulated switchgear.

FIG. 2 is a side view of the configuration of the first embodiment.

FIG. 3A is a side view of the configuration of the second embodiment,
(B) is a plan view.

FIG. 4 is a side view of the configuration of the third embodiment.

FIG. 5A is a side view of the configuration of the fourth embodiment,
(B) is a plan view.

FIG. 6 is a side view of the configuration of the fifth embodiment.

FIG. 7 is a side view of the configuration of the sixth embodiment.

FIG. 8 is a side view of the configuration of the seventh embodiment.

FIG. 9 is a side view of the configuration of the eighth embodiment.

FIG. 10 is a side view of the configuration of the ninth embodiment.

FIG. 11 is a single-line diagram in a case where disconnectors are connected to both sides of the air insulated switchgear.

FIG. 12 is a side view of the configuration of the tenth embodiment.

FIG. 13 is a plan view of the configuration of FIG.

FIG. 14 is a side view of the configuration of the eleventh embodiment.

FIG. 15 is a side view of the configuration of the twelfth embodiment.

FIG. 16 is a cross-sectional view illustrating a configuration when a voltage dividing element is provided in a zinc oxide element lightning arrester.

FIG. 17 is a side view of the configuration of the fourteenth embodiment.

FIG. 18 is a side view of the configuration of the fifteenth embodiment.

FIG. 19 is a side view of the configuration of the sixteenth embodiment.

FIG. 20 is a side view of the configuration of the eighteenth embodiment.

FIG. 21 is a side view of the configuration of the nineteenth embodiment.

FIG. 22 is a side view of the configuration of the twentieth embodiment.

FIG. 23 is a cross-sectional view showing a configuration in which a cut-off insulator tube of a vertical single-point insulator gas circuit breaker is made of resin.

FIG. 24 is a cross-sectional view of a conventional vertical single-point insulator type gas circuit breaker.

[Explanation of symbols]

21 circuit breaker, 22 current transformer, 23 disconnector, 24 lightning arrester, 25 capacitor voltage transformer, 31 vertical single-point insulator gas circuit breaker, 31a breaking part, 31b supporting part, 31c lower terminal, 31d upper terminal, 31e operation mechanism, 31M inspection space, 32 optical current transformer, 33
Disconnector, 33a movable-side support insulator, 33b movable-side contact part, 33c disconnector blade, 33d drive insulator, 3
3e drive mechanism, 33f fixed-side contact, 33g disconnector terminal, 33h fixed-side support insulator, 34 connection conductor, 3
5 common mount, 43 disconnector, 44 lightning arrester, 53 disconnector, 54 insulator-type capacitor, 55 common mount, 61
Inclined single-point insulator gas circuit breaker, 61a cut-off section, 61
b support, 61c lower terminal, 61d upper terminal, 6
1e Operation mechanism, 61M inspection space, 63 disconnector, 63a movable support insulator, 63b movable contact,
63c disconnector blade, 63d drive insulator, 63e
Driving mechanism, 65 common mount, 73 disconnector, 83 disconnector, 85 common mount, 91 Y-shaped two-point insulator type gas circuit breaker, 91a, 91b cutoff section, 91c support insulator, 91
d Intermediate support part, 91e, 91f terminal, 91g operation mechanism, 91M inspection space, 94 connection conductor, 95
Common gantry, 96 common gantry, 103, 104 connecting conductor, 105 common gantry, 106 second disconnector, 106a
Movable support insulator, 106b Movable contact part, 106c
Disconnector blade, 106d drive insulator, 106e drive mechanism, 106f fixed-side contact, 106g disconnector terminal, 106h fixed-side support insulator, 107 second disconnector, 116 first disconnector, 117 second disconnector, 1
18 Lightning Arrester, 125 Common Stand, 126 First Disconnector, 127 Second Disconnector, 129 Insulator Type Capacitor, 138 Lightning Arrester, 138a Insulator Tube, 138b Zinc Oxide Element, 138c Zinc Oxide Element for Partial Pressure, 138d
Upper cover, 138e Lower cover, 138f Upper cover, 138g
Lower cover, 138h connection lead, 138i voltage dividing terminal, 138j signal processing section, 138k ground lead,
38m ground terminal, 138n mount, 145 common mount, 146 first disconnector, 146b movable contact
146c disconnector blade, 146d drive insulator, 14
6e drive mechanism, 146f fixed contact, 146g
Disconnector terminal, 146h fixed-side support insulator, 147 second disconnector, 156 first disconnector, 157 second disconnector, 165 common mount, 166 first disconnector, 174
Connection conductor, 175 common frame, 195 common frame, 2
00 blocker, 201 blocker insulator, 202 blocker,
203 drive mechanism, 204 connection conductor, 205 closing resistance, 206 lower terminal, 207 upper terminal, 210 support, 211 support insulator, 212 insulating operation rod, 2
13 lower flange, 214 operation mechanism, 215 operation box, 221 optical current transformer, 222 optical fiber, 223
Signal processing unit.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriyoshi Toshima 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation (reference) 5G017 AA12 AA32 BB01 BB09 BB12 BB18 JJ02

Claims (14)

[Claims] 1. A vertical single-point insulator type gas circuit breaker having a current detecting function, and a vertical disconnector blade between the upper terminal of the vertical single-point insulator gas breaker and the tip of the disconnector blade at the time of opening. A fixed-side support insulator having a movable-side support insulator and a drive insulator having a movable contact and a disconnector blade attached thereto at a position separated by a predetermined insulation distance, and having a fixed-side contact attached at a closing position of the disconnector blade. A vertically insulated switchgear, wherein a disconnector with a vertical one-point disconnection provided thereon is disposed on a common mount. 2. A one-point insulator type gas circuit breaker having a current detecting function and having a cut-off portion inclined, a movable contact and a disconnector connected to a lower terminal of an intermediate portion of the one-point insulator gas breaker. One end of the blade and one end of the drive insulator are attached, and a vertical single-point disconnector with a fixed-side support insulator with a fixed-side contact attached at the throw-in position of the disconnector blade is arranged on a common mount. Aerial insulated switchgear characterized by the following. 3. It has a current detection function, and the two cut-off portions
A two-point insulator type gas circuit breaker arranged in a shape of a letter or a straight line and supported by a supporting insulator, and a movable contact and a disconnector blade in close proximity to one terminal of the two-point insulator gas breaker. The fixed support insulator with the fixed-side contact attached with the fixed-side contact at the insertion position of the disconnector blade is installed on the common stand with the mounted movable-side support insulator and drive insulator attached. An aerial insulated switchgear characterized by being made. 4. A disconnecting blade of the disconnector at a throwing position of the disconnecting blade.
The air-insulated switchgear according to any one of claims 1 to 3, wherein a lightning arrester to which a fixed contact of the disconnector is attached is provided at an upper portion. 5. The disconnecting blade of the disconnecting switch at a throwing position of the disconnecting blade.
The air-insulated switchgear according to any one of claims 1 to 3, wherein an insulator-type capacitor of a capacitor-type voltage transformer having a fixed contact of a disconnector mounted on an upper portion thereof is arranged. 6. A vertical single-point insulator type gas circuit breaker having a current detecting function, and a movable contactor located at a predetermined insulating distance from a lower terminal portion at an intermediate portion of the vertical single-point insulator type gas circuit breaker. A first disconnection of a vertical one-point disconnection in which a movable support insulator and a drive insulator to which a disconnector blade is attached are arranged, and a fixed support insulator to which a fixed contact is attached is disposed at a closing position of the disconnector blade. And the upper terminal of the vertical single-point insulator gas breaker on the opposite side where the first disconnector of the vertical single-point insulator gas circuit breaker is disposed and the tip of the disconnector blade in the vertical state when the electrode is opened. A movable support insulator and a drive insulator having a movable contact and a disconnector blade attached thereto are disposed at a position separated by a predetermined insulation distance between the fixed contact and a fixed contact attached at a closing position of the disconnector blade. Side support An aerial insulated switchgear, wherein a vertical disconnection second disconnector on which an insulator is disposed is disposed on a common mount. 7. A one-point insulator type gas circuit breaker having a current detecting function and having a cut-off portion inclined, and a movable contact of a disconnector connected to an upper terminal at the tip end of the one-point insulator gas breaker. A disconnector blade and one end of a drive insulator are attached, a fixed-side support insulator having a fixed-side contact attached at a throw-in position of the disconnector blade, and a vertically single-pointed first disconnector; One end of a movable contact, a disconnector blade, and one end of a drive insulator are attached to the lower terminal of the one-point inclined insulator type gas circuit breaker in the opposite direction where the first disconnector of the insulator type gas circuit breaker is disposed, and the disconnection is performed. Air-insulated switchgear, characterized in that a vertical disconnection switch and a second disconnector having a fixed-side support insulator having a fixed-side contact attached to the input position of the switch blade are disposed on a common mount. apparatus. 8. It has a current detection function, and the two cut-off portions
A two-point insulator type gas circuit breaker arranged in a V-shape or a straight line and supported by a supporting insulator, a movable contact and a disconnector in proximity to a terminal on one end side of the two-point insulator gas breaker. The movable disconnecting support insulator and the drive insulator with the switch blade mounted are arranged, and the fixed disconnecting support insulator with the fixed contact attached to the disconnecting blade mounting position is arranged as a vertical single-point first disconnector. The movable-side support insulator and the drive insulator having the movable contact and the disconnector blade attached thereto are arranged close to the terminal on the other end side of the above-mentioned two-point insulator type gas circuit breaker, and fixed at the closing position of the disconnector blade. An air-insulated switchgear, wherein a vertical disconnection second disconnector on which a fixed-side support insulator to which a side contact is mounted is disposed is disposed on a common mount. 9. A lightning arrester having a fixed-side contact of a disconnector mounted on an upper portion of each of the first disconnector and the second disconnector, at a position where the disconnector blade is turned on. An air-insulated switchgear according to any one of claims 6 to 8. 10. An insulator type capacitor of a capacitor type voltage transformer having a fixed side contact of a disconnector mounted on an upper portion thereof at a position where a disconnector blade of a first disconnector is inserted,
9. The lightning arrester having a fixed contactor of the disconnector mounted thereon at an input position of the disconnector blade of the second disconnector. Air insulated switchgear. 11. A zinc oxide element is laminated inside a porcelain tube at a position where a disconnector blade of a first disconnector is inserted, and the lowermost layer of the zinc oxide element is used as a voltage dividing element. It has a voltage detection function to detect the voltage between and detects the voltage between the lightning arrester and the lightning arrester with the fixed contact of the disconnecting switch attached to the upper part, and the disconnecting switch blade of the second disconnecting switch The air-insulated switchgear according to any one of claims 6 to 8, wherein a lightning arrester having a fixed contact of the disconnector mounted thereon is disposed at an upper portion thereof. 12. An insulator tube of a vertical single-point insulator type gas circuit breaker having a current detection function, wherein an inner peripheral portion is formed by an FRP insulating member, and an outer peripheral portion is formed by a composite insulator formed by molding a weather resistant resin. The air-insulated switchgear according to claim 1 or 6, wherein: 13. A cut-off insulator tube of an inclined single-point insulator type gas circuit breaker having a current detecting function and a cut-off portion arranged in an inclined manner,
The air-insulated switchgear according to claim 2 or 7, wherein the inner peripheral portion is formed of an FRP insulating member, and the outer peripheral portion is formed of a composite insulator formed by molding a weather-resistant resin. 14. An insulator tube of a two-point cut-off type gas circuit breaker having a current detection function and having two interrupting portions arranged in a V-shape or a straight line and supported by a supporting insulator, an inner peripheral portion of which is provided. FR
4. The semiconductor device according to claim 3, wherein the outer peripheral portion is formed of a composite insulator formed by molding a weather resistant resin.
9. The air insulated switchgear according to claim 8.