EP3376518A1

EP3376518A1 - Method for operating disconnector

Info

Publication number: EP3376518A1
Application number: EP16863877.3A
Authority: EP
Inventors: Masahiro Arioka; Naoaki Inoue; Kenji Onishi; Eiji Morito
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2015-11-09
Filing date: 2016-09-02
Publication date: 2018-09-19
Anticipated expiration: 2036-09-02
Also published as: EP3376518A4; WO2017081913A1; JPWO2017081913A1; HK1256533A1; CN108352269A; EP3376518B1; CN108352269B; JP6628809B2

Abstract

A disconnector operating device including a plurality of independent state detection limit switches is provided. The operating device includes: a motor (16) configured to provide driving force to a movable contactor of a disconnector body via an output shaft; an ON state motor stop limit switch (19a) and an OFF state motor stop limit switch (19b) provided around a shaft (14) and a shaft (15) configured to rotate by the driving force of the motor (16); a plurality of ON state detection limit switches (9a) and OFF state detection limit switches (9b) provided around a cam shaft (6) configured to rotate by the driving force of the motor (16).

Description

TECHNICAL FIELD

The present invention relates to a disconnector operating device that is used, for example, in a gas-insulated switchgear having a switching device housed in a sealed compartment having insulation gas sealed therein and that manually and electrically performs an opening/closing operation of the disconnector.

BACKGROUND ART

Generally, regarding a gas-insulated switchgear, a device has been made compact due to excellent insulating performance of SF6 gas, and the space for the entire switchgear has been saved. For example, in the case of a three-position disconnector that is provided in a gas-insulated switchgear and that has both functions of a disconnector and a grounding switch, a main circuit portion of the three-position disconnector is disposed within a pressure compartment having SF6 gas sealed therein.
Driving force of a motor that is disposed outside the pressure compartment as a driving source of an operating device is provided to a movable contactor of the main circuit portion of the three-position disconnector via an output shaft, so that the three-position disconnector operates into an ON state, an OFF state, and a grounding state. Conventionally, a switch operating device that uses, in such a three-position disconnector, four limit switches or two limit switches with a C-contact that have a function to detect the state of the three-position disconnector and a function to detect a motor stop position in the operating device, has been proposed (for example, Patent Document 1).
In addition, a grounding device has been proposed which detects a grounding state or an open state by using an optoelectronic switch or a mechanical switch such as a limit switch and which causes rotation of a motor for opening/closing a grounding electrode to automatically stop, by incorporating a contact of the switch into a sequence circuit of a power supply for the motor (for example, Patent Document 2).

LIST OF CITATIONS

PATENT DOCUMENTS

Patent Document 1: Japanese Patent JP 4 146 125 B2
Patent Document 2: Japanese Laid-Open Patent Publication JP 11-75305 A

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

A conventional switch operating device uses limit switches having a function to detect the state of the three-position disconnector and a function to detect a motor stop position in the operating device. In addition, a conventional grounding device also performs stopping of the motor for opening/closing the grounding electrode, by using the switch that detects a grounding state or an open state. Therefore, a plurality of state detection limit switches are needed, for example, in the case where it is necessary to notify a plurality of other devices of the state of the three-position disconnector or the like.
In the case where a plurality of state detection limit switches are provided, when one or some of the state detection limit switches also have a function to stop the motor, the following is assumed: the case where a malfunction occurs, such as the case where a state detection limit switch that has not completed state detection even when the motor stops, occurs due to the individual difference between or assembling variations of the state detection limit switches. Accordingly, there is a problem that a plurality of independent state detection limit switches need to be provided at a different position without also serving to detect a motor stop position.
The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a disconnector operating device including a plurality of independent state detection limit switches.

SOLUTION TO THE PROBLEMS

A disconnector operating device according to the present invention includes: a motor configured to provide driving force to a movable contactor of a disconnector body via an output shaft; a motor stop limit switch provided around a shaft configured to rotate by the driving force of the motor, the motor stop limit switch being configured to detect a motor stop position in each of an ON state and an OFF state of the disconnector body; and a plurality of state detection limit switches provided around a shaft configured to rotate by the driving force of the motor, the plurality of state detection limit switches being configured to detect the ON state and the OFF state of the disconnector body.

EFFECT OF THE INVENTION

According to the present invention, the disconnector operating device includes: a motor configured to provide driving force to a movable contactor of a disconnector body via an output shaft; a motor stop limit switch provided around a shaft configured to rotate by the driving force of the motor, the motor stop limit switch being configured to detect a motor stop position in each of an ON state and an OFF state of the disconnector body; and a plurality of state detection limit switches provided around a shaft configured to rotate by the driving force of the motor, the plurality of state detection limit switches being configured to detect the ON state and the OFF state of the disconnector body. Thus, an effect that a disconnector operating device including a plurality of independent state detection limit switches can be obtained, is achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1: is a schematic configuration diagram showing the external configuration of a disconnector operating device according to Embodiment 1 of the present invention.
FIG. 2: is a perspective view as seen from a motor stop limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 3: is an explanatory diagram illustrating the motor stop limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 4: is an explanatory diagram illustrating a main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 5a: is a perspective view showing a state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 5b: is an explanatory diagram illustrating the state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 6a: is an explanatory diagram illustrating operation of the main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 6b: is an explanatory diagram illustrating operation of the main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 6c: is an explanatory diagram illustrating operation of the main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 6d: is an explanatory diagram illustrating operation of the main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 6e: is an explanatory diagram illustrating operation of the main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 7a: is an explanatory diagram illustrating operation of the state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 7b: is an explanatory diagram illustrating operation of the state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 8: is an explanatory diagram illustrating operation during an ON state, an OFF state, and a grounding state of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 9a: is a circuit diagram showing an ON command control circuit of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 9b: is a circuit diagram showing an OFF command control circuit of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 9c: is a circuit diagram showing a grounding command control circuit of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 10: is a circuit diagram showing a motor control circuit of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 11: is a circuit diagram showing an OFF command control circuit of a disconnector operating device according to Embodiment 2 of the present invention.

DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present invention will be described, and in each drawing, the same or corresponding parts are denoted by the same reference characters.

Embodiment 1

FIG. 1 is a schematic configuration diagram showing the external configuration of a disconnector operating device according to Embodiment 1 of the present invention; FIG. 2 is a perspective view as seen from a motor stop limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention; FIG. 3 is an explanatory diagram illustrating the motor stop limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
FIG. 4 is an explanatory diagram illustrating a main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention; FIG. 5a is a perspective view showing a state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention; and FIG. 5b is an explanatory diagram illustrating the state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention.
In FIG. 1, a three-position disconnector 1 that is a disconnector body operates into an ON state, an OFF state, and a grounding state by operating a movable contactor (not shown) of a main circuit portion, which is disposed within a pressure compartment having SF₆ gas sealed therein, with an operation shaft (not shown) that is connected directly to an output shaft 13 of a disconnector operating device 100 and that extends through the pressure compartment with airtightness of the pressure compartment being kept.
The disconnector operating device 100 includes a state detection limit switch portion 2, a main mechanism portion 3, a motor stop limit switch portion 4, and a shutter portion 5 in this order from the three-position disconnector 1 side. The shutter portion 5 mainly includes a shutter for controlling insertion of a manual operation handle, and manual operation of the disconnector operating device 100 is performed from the shutter portion 5 side. The shutter portion 5 has the same configuration as that of a conventional one, and thus the detailed description thereof is omitted.
In FIGS. 2 and 3, the motor stop limit switch portion 4 is provided with a DS peration shaft 14 and an ES operation shaft 15 that rotate in conjunction with each other by a gear 10a and a gear 10b, a gear mounted on a rotation shaft of a driving motor 16 is in mesh with the gear 10a, and the DS operation shaft 14 and the ES operation shaft 15 rotate by driving force of the motor 16. An ON state motor stop cam 18a is fixed to the DS operation shaft 14 and causes an ON state motor stop limit switch 19a, which is mounted around the DS operation shaft 14, to operate.
In addition, an OFF state motor stop cam 18b and a grounding state motor stop cam 18c are fixed to the ES operation shaft 15 and respectively cause an OFF state motor stop limit switch 19b and a grounding state motor stop limit switch 19c, which are mounted around the ES operation shaft 15, to operate.
The ON state motor stop limit switch 19a stops the driving motor 16 after the three-position disconnector 1 shifts from the OFF state to the ON state. The OFF state motor stop limit switch 19b is shared to stop the driving motor 16 both after the three-position disconnector 1 shifts from the ON state to the OFF state and after the three-position disconnector 1 shifts from the grounding state to the OFF state.
By sharing the OFF state motor stop limit switch 19b, the number of used limit switches can be reduced. The grounding state motor stop limit switch 19c stops the driving motor 16 after the three-position disconnector 1 shifts from the OFF state to the grounding state. In addition, a contact of each motor stop limit switch is closed when each motor stop limit switch does not operate, and becomes opened by the motor stop cam when each motor stop limit switch operates.
In FIG. 4, the main mechanism portion 3 includes: a Geneva gear 11 that is fixed to the output shaft 13; and an operation lever 12 that is fixed to the ES operation shaft 15 and that is in mesh with the Geneva gear 11. Although operation thereof will be described in detail later, when the operation lever 12 makes one rotation (360°), the Geneva gear 11 and the output shaft 13 rotate by 45°.
In FIGS. 2, 5a, and 5b, in the state detection limit switch portion 2, a cam shaft gear 7 and a state detection cam 8 are fixed to a cam shaft 6, and a plurality of ON state detection limit switches 9a, a plurality of OFF state detection limit switches 9b, and a plurality of grounding state detection limit switches 9c are disposed such that the state detection limit switches 9a, 9b, and 9c are mounted around the cam shaft 6 equally at pitches of 60° and in three stacking stages in the axial direction.
The cam shaft gear 7 is in mesh with a gear (not shown) fixed to the ES operation shaft 15. Thus, the cam shaft 6 rotates by 60° when the ES operation shaft 15 makes approximately one rotation (360°). In the case where multiple state detection limit switches are further needed, another similar set can be provided so as to operate in conjunction with the DS operation shaft 14.
In addition, the number of stacking stages in the axial direction is not limited to three, and the state detection limit switches only need to be provided in a plurality of stages as necessary. By changing the number of stages, the number of state detection limit switches can be adjusted.
Here, control circuits at the time of electric control in the disconnector operating device 100 will be described.
FIG. 9a is a circuit diagram showing an ON command control circuit of the disconnector operating device according to Embodiment 1 of the present invention; FIG. 9b is a circuit diagram showing an OFF command control circuit of the disconnector operating device according to Embodiment 1 of the present invention; FIG. 9c is a circuit diagram showing a grounding command control circuit of the disconnector operating device according to Embodiment 1 of the present invention; and FIG. 10 is a circuit diagram showing a motor control circuit of the disconnector operating device according to Embodiment 1 of the present invention.
In FIG. 9a, the ON command control circuit includes: a circuit from a b-contact 21b of a motor control relay, to which an ON command signal is input, via the OFF state detection limit switch 9b to an OFF state to ON state electromagnetic contactor 22; and a self-holding circuit from a contact 22a of the OFF state to ON state electromagnetic contactor via a parallel connection circuit of the OFF state detection limit switch 9b and the ON state motor stop limit switch 19a to the OFF state to ON state electromagnetic contactor 22.
In FIG. 9b, the OFF command control circuit is shared for both the case of shift from the grounding state to the OFF state and the case of shift from the ON state to the OFF state, and includes: a circuit from a b-contact 21b of the motor control relay, to which an OFF command signal is input, via the grounding state detection limit switch 9c to a grounding state to OFF state electromagnetic contactor 23; a self-holding circuit from a parallel connection circuit of the grounding state detection limit switch 9c and the OFF state motor stop limit switch 19b via a contact 23a of the grounding state to OFF state electromagnetic contactor to the grounding state to OFF state electromagnetic contactor 23; a circuit from the b-contact 21b of the motor control relay, to which the OFF command signal is input, via the ON state detection limit switch 9a to an ON state to OFF state electromagnetic contactor 24; and a self-holding circuit from a parallel connection circuit of the ON state detection limit switch 9a and the OFF state motor stop limit switch 19b via a contact 24a of the ON state to OFF state electromagnetic contactor to the ON state to OFF state electromagnetic contactor 24.
In FIG. 9c, the grounding command control circuit includes: a circuit from a b-contact 21b of the motor control relay, to which a grounding command signal is input, via the OFF state detection limit switch 9b to an OFF state to grounding state electromagnetic contactor 25; and a self-holding circuit from a contact 25a of the OFF state to grounding state electromagnetic contactor via a parallel connection circuit of the OFF state detection limit switch 9b and the grounding state motor stop limit switch 19c to the OFF state to grounding state electromagnetic contactor 25.
In FIG. 10, the motor control circuit includes the motor 16, a resistor 17, two thermal relays 20, two a-contacts 21a of the motor control relay, two contacts 22a of the OFF state to ON state electromagnetic contactor, two contacts 23a of the grounding state to OFF state electromagnetic contactor, two contacts 24a of the ON state to OFF state electromagnetic contactor, and two contacts 25a of the OFF state to grounding state electromagnetic contactor, and these components are connected such that a rotating direction of the motor 16 is determined by closing the paired two contacts of the contactor.
Next, operation of the disconnector operating device 100 will be described.
FIGS. 6a to 6e are explanatory diagrams illustrating operation of the main mechanism portion of the disconnector operating device according to Embodiment 1 of the present invention; FIGS. 7a and 7b are explanatory diagrams illustrating operation of the state detection limit switch portion of the disconnector operating device according to Embodiment 1 of the present invention; and FIG. 8 is an explanatory diagram illustrating operation during the ON state, the OFF state, and the grounding state of the disconnector operating device according to Embodiment 1 of the present invention.
First, the case of operation from the OFF state to the ON state will be described. In the OFF state, the operation lever 12 of the main mechanism portion 3 is in mesh with a central tooth of the Geneva gear 11 as shown in FIG. 6a. At this time, in the state detection limit switch portion 2, the state detection cam 8 causes the OFF state detection limit switches 9b to operate to close the contacts thereof as shown in FIG. 7a.
When an ON command signal is input to the ON command control circuit shown in FIG. 9a in the OFF state, since the OFF state detection limit switches 9b have operated to become closed, the OFF state to ON state electromagnetic contactor 22 is excited via the b-contact 21b of the motor control relay and the OFF state detection limit switch 9b, and the contacts 22a of the OFF state to ON state electromagnetic contactor 22 become closed, so that the self-holding circuit operates.
When the contact 22a of the OFF state to ON state electromagnetic contactor 22 becomes closed, in the motor control circuit shown in FIG. 10, power is provided to the motor 16 via the contacts 22a of the OFF state to ON state electromagnetic contactor, so that the motor 16 rotates and the operation lever 12, which is fixed to the ES operation shaft 15, rotates counterclockwise.
When the operation lever 12 rotates from the position in FIG. 6a to the position shown in FIG. 6b, the contacts of the OFF state detection limit switches 9b become opened. However, at this time point, since the ON state motor stop limit switch 19a has not operated, the contact thereof is closed, and the self-holding circuit is continued, so that the motor 16 continues to rotate and the operation lever 12 also rotates counterclockwise.
When the operation lever 12 rotates counterclockwise from the position in FIG. 6b via the position in FIG. 6c to the position in FIG. 6d, the Geneva gear 11, which is brought into mesh with the operation lever 12, rotates clockwise by 45° to cause a movable contactor (not shown) of the three-position disconnector 1 to operate via the output shaft 13 to shift the three-position disconnector 1 to the ON state.
When the operation lever 12 further rotates counterclockwise, in the state detection limit switch portion 2, the state detection cam 8 shifts to the position shown in FIG. 7b at which the state detection cam 8 has rotated by 60°, thereby causing the ON state detection limit switches 9a to operate.
Thereafter, when the operation lever 12 further rotates counterclockwise to enter the state shown in FIG. 6e in which the operation lever 12 has made approximately one rotation (360°), the ON state motor stop limit switch 19a operates to open the contact thereof, whereby the self-holding circuit is cancelled, and the excitement of the OFF state to ON state electromagnetic contactor 22 is also cancelled.
As a result, the contacts 22a become opened, and the power supply to the motor 16 stops. In this state, in the motor control circuit shown in FIG. 10, a closed circuit of the a-contacts 21a of the motor control relay, the resistor 17, the thermal relays 20, and the motor 16 is established, dynamic braking is applied to the motor 16, and the motor 16 stops.
The case of operation from the ON state to the OFF state in the opposite direction will be described. In the ON state, the operation lever 12 of the main mechanism portion 3 is in mesh with an ON-side tooth of the Geneva gear 11 as shown in FIG. 6e. At this time, in the state detection limit switch portion 2, the state detection cam 8 causes the ON state detection limit switches 9a to operate to close the contacts thereof as shown in FIG. 7b.
When an OFF command signal is input to the OFF command control circuit shown in FIG. 9b in the OFF state, since the ON state detection limit switches 9a have operated to become closed, the ON state to OFF state electromagnetic contactor 24 is excited via the b-contact 21b of the motor control relay and the ON state detection limit switch 9a, and the contacts 24a of the ON state to OFF state electromagnetic contactor 24 become closed, so that the self-holding circuit operates.
When the contacts 24a of the ON state to OFF state electromagnetic contactor 24 become closed, in the motor control circuit shown in FIG. 10, power is provided to the motor 16 via the contacts 24a of the ON state to OFF state electromagnetic contactor, so that the motor 16 rotates and the operation lever 12, which is fixed to the ES operation shaft 15, rotates clockwise.
When the operation lever 12 rotates from the position in FIG. 6e to the position shown in FIG. 6d, the contacts of the ON state detection limit switches 9a become opened. However, at this time point, since the OFF state motor stop limit switch 19b has not operated, the contact thereof is closed, and the self-holding circuit is continued, so that the motor 16 continues to rotate and the operation lever 12 also rotates clockwise.
When the operation lever 12 rotates clockwise from the position in FIG. 6d via the position in FIG. 6c to the position in FIG. 6b, the Geneva gear 11, which is brought into mesh with the operation lever 12, rotates counterclockwise by 45° to cause the movable contactor (not shown) of the three-position disconnector 1 to operate via the output shaft 13 to shift the three-position disconnector 1 to the OFF state. When the operation lever 12 further rotates clockwise, in the state detection limit switch portion 2, the state detection cam 8 shifts to the position shown in FIG. 7a at which the state detection cam 8 has rotated by 60°, thereby causing the OFF state detection limit switches 9b to operate.
Thereafter, when the operation lever 12 further rotates clockwise to enter the state shown in FIG. 6a in which the operation lever 12 has made approximately one rotation (360°), the OFF state motor stop limit switch 19b operates to open the contact thereof, whereby the self-holding circuit is cancelled, and the excitement of the ON state to OFF state electromagnetic contactor 24 is also cancelled.
As a result, the contacts 24a become opened, and the power supply to the motor 16 stops. In this state, in the motor control circuit shown in FIG. 10, a closed circuit of the a-contacts 21a of the motor control relay, the resistor 17, the thermal relays 20, and the motor 16 is established, dynamic braking is applied to the motor 16, and the motor 16 stops.
Regarding operation from the OFF state to the grounding state, operation is performed as in the grounding command control circuit in FIG. 9c, and regarding operation from the grounding state to the OFF state, operation is performed as in the circuit at the grounding state to OFF state electromagnetic contactor 23 side of the OFF command circuit in FIG. 9b. The detailed operation is the same as described above, and thus the description thereof is omitted.
FIG. 8 shows a diagram obtained by charting the above-described operation states in a time chart format. In FIG. 8, the degree in the OFF state is defined as 0 degree, the vertical axis indicates movement of the Geneva gear 11, the horizontal axis indicates movement of the operation lever 12, and the contact states of the motor stop limit switch and the state detection limit switches are indicated so as to correspond to the horizontal axis.
As described above, in the disconnector operating device according to the present invention, the plurality of state detection limit switches are provided at a position different from that of the motor stop limit switch. In the case where a plurality of state detection limit switches are provided, when the state detection limit switches also have a function to stop the motor, for example, as in the conventional art, there is a possibility that a limit switch that has not completed state detection even when the motor stops, occurs due to the individual difference between or assembling variations of the limit switches.
For preventing this, adjustment of assembling of the state detection limit switches becomes difficult. However, as in the present invention, by providing a plurality of state detection limit switches at a position different from that of the motor stop limit switch and having a configuration in which the motor stop limit switch operates after completion of operation of the state detection limit switches, state detection of all the state detection limit switches is enabled without being influenced by the individual difference between or assembling variations of the plurality of limit switches, and adjustment of assembling of the plurality of state detection limit switches becomes easy.

Embodiment 2

FIG. 11 is a circuit diagram showing an OFF command control circuit of a disconnector operating device according to Embodiment 2 of the present invention.
In Embodiment 1, the case of the three-position disconnector in which the disconnector body operates into the ON state, the OFF state, and the grounding state has been described above. The disconnector operating device according to the present invention is applicable to a two-position disconnector in which a disconnector body operates into an ON state and an OFF state. In this case, the ON command control circuit is the same as in FIG. 9a described in Embodiment 1, but the OFF command control circuit is as shown in FIG. 11 since there is no grounding state in the case of the two-position disconnector. The detailed description of operation is the same as described in Embodiment 1 and thus is omitted.
A grounding device in which a disconnector body operates into a grounding state and an OFF state is also one type of two-position disconnector. In this case, the ON state is merely replaced with the grounding state, and the grounding device is a similar device.
It is noted that, within the scope of the present invention, the above embodiments may be freely combined with each other, or each of the above embodiments may be modified or simplified as appropriate.

DESCRIPTION OF REFERENCE CHARACTERS

1: three-position disconnector
2: state detection limit switch portion
3: main mechanism portion
4: motor stop limit switch portion
5: shutter portion
6: cam shaft
7: cam shaft gear
8: state detection cam
9a: ON state detection limit switch
9b: OFF state detection limit switch
9c: grounding state detection limit switch
10a: gear
10b: gear
11: Geneva gear
12: operation lever
13: output shaft
14: DS operation shaft
15: ES operation shaft
16: motor
18a: ON state motor stop cam
18b: OFF state motor stop cam
18c: grounding state motor stop cam
19a: ON state motor stop limit switch
19b: OFF state motor stop limit switch
19c: grounding state motor stop limit switch

Claims

A disconnector operating device comprising:
- a motor configured to provide driving force to a movable contactor of a disconnector body via an output shaft;

- a motor stop limit switch provided around a shaft configured to rotate by the driving force of the motor, the motor stop limit switch being configured to detect a motor stop position in each of an ON state and an OFF state of the disconnector body; and

- a plurality of state detection limit switches provided around a shaft configured to rotate by the driving force of the motor, the plurality of state detection limit switches being configured to detect the ON state and the OFF state of the disconnector body.
The disconnector operating device according to claim 1,
wherein the state detection limit switches are disposed around the shaft at pitches of 60°.
The disconnector operating device according to claim 1 or 2,
wherein the state detection limit switches are provided in a plurality of stages in an axial direction.
The disconnector operating device according to any one of claims 1 to 3, wherein the motor stop limit switch is adapted to operate after the state detection limit switches operate.
The disconnector operating device according to any one of claims 1 to 4, wherein the disconnector body is a three-position disconnector capable of being operated to be switched to three positions in an ON state, an OFF state, and a grounding state.
The disconnector operating device according to claim 5,
wherein the motor stop limit switch is adapted to detect motor stop positions in the ON state, the OFF state, and the grounding state.
The disconnector operating device according to claim 5 or 6,
wherein the state detection limit switches are adapted to detect the ON state, the OFF state, and the grounding state.