JP3196425B2 - Operation diagnostic system for disconnectors and earthing switches - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a power source other than human power as a drive source, and opens and closes a disconnector or a ground switch in which the power of the drive source is transmitted to a main contact via a rotary drive shaft. The present invention relates to an operation diagnosis system for a disconnector / grounding switch for diagnosing whether the operation is normal.

[0002]

2. Description of the Related Art In recent years, switchgears installed in electric substations are filled with an insulating gas such as SF ₆ gas in consideration of land shortages in substations and other electric substations and social demands for stable power supply. Switching devices such as circuit breakers, disconnectors, grounding switches, etc. are housed in a sealed container, and small-sized, highly reliable gas-insulated switchgear (GIS), which blocks the influence of outside air, is the mainstream. . Among them, the GIS is often installed indoors, so that the circuit breaker is particularly required to be small in size and low in noise, and the drive source of the operating device is often hydraulic. On the other hand, disconnectors and earthing switches do not require as much drive power as circuit breakers,
In many cases, the driving source for miniaturization and low noise is an electric motor. Further, in the disconnector and the earthing switch, smooth operation is always required for safety of the GIS inspection work and smooth progress of the inspection work.

[0003] From the above, the prior art relating to the operation diagnosis system of the disconnecting switch / grounding switch mainly describes a disconnecting machine or a grounding switch using a motor as a drive source, and other drive sources and ground switches. For example, a description will be given of a spring stored by an electric motor, a disconnector or a grounding switch using hydraulic pressure or pneumatic pressure as necessary. In a disconnector or a grounding switch using an electric motor as a drive source, a drive mechanism is composed of many mechanical parts to reduce the number of rotations of the electric motor and transmit torque to a rotary drive shaft. An operation failure due to deformation, breakage, or the like of the device may occur, and the opening time or closing time, or the opening speed or closing speed during operation may not fall within the range of the control value. Conventionally, as a system for diagnosing various quantities related to the opening / closing operation, for example, the following several systems or methods have been proposed.

For example, as disclosed in Japanese Patent Application Laid-Open No. 60-228974, an electrical stroke signal of a switching device is sampled to determine an opening speed or a closing speed, and is compared with a desired value or a control value. In addition, from the electrical contact signal of the switchgear (for example, a current waveform passing through an auxiliary contact linked with the main contact) and an opening or closing signal (for example, a waveform of a tripping coil current or a closing coil current), an opening time or closing time. Operation diagnostic system which determines the value of the parameter and compares it with a desired value or a control value.
As disclosed in Japanese Patent Application Laid-Open No. 1-61073, a disconnector or a grounding device is used as a diagnosis target, and an opening / closing operation resistance (opening / closing stroke, a time change of a driving cylinder pressure when driving force is pneumatic, an opening time) , Input time) is provided in a disconnector or a grounding device of a power station or a substation, and a control station that centrally manages a plurality of power stations and substations has an output from the detecting means. An operation diagnosis system provided with a data management device including a control device for calculating the opening / closing operation resistance based on a signal and a display device for displaying the calculation result, or proposed in Japanese Patent Application Laid-Open No. 63-249068. At least the closing coil is included in the quantities for determining whether or not there is an abnormality in the operation of the switchgear by individually comparing various quantities related to the operation of the switchgear with the values immediately after the manufacture of the switchgear. Alternatively, the operation diagnosis method includes the time from the start of energization of the cut-off coil to the first and second predetermined positions during the entire stroke of the switching device and the time between the first and second predetermined positions. Etc.

[0005]

Of these operation diagnosis systems or methods, the former two (Japanese Patent Application Laid-Open No. 60-228).
974 and JP-A-61-61073.
Are provided with a detecting means for determining the time lapse of the entire stroke of the switchgear in the system, and the proposal by JP-A-63-249068 discloses, for example, a switchgear to be diagnosed. Is a hydraulic drive circuit breaker, when an abnormality is found in the operation time of the auxiliary contact linked with the main contact (the time from the input command to the opening of the b contact, the time from the closing of the a contact) during the closing operation, Even if the circuit breaker is disassembled and inspected, the cause of the abnormality may be the parts that start operating before the start of the movement of the main contacts, such as solenoid valves and hydraulic pistons that are mechanically connected to auxiliary contacts and driven by hydraulic pressure. If not, there are not many parts involved in the operation after the start of the movement of the main contact.Therefore, the minimum diagnostic items that can diagnose the transition process of the breaker from the stationary state to the moving state are included in the diagnostic items. Include in Are those was Unishi, for this, in the example proposed, the first in the entire stroke of the foregoing, the second
As a sensor element for measuring the movement time between the predetermined positions, a barcode and a fiber sensor, which are interlocked with the main contact and have first and second predetermined positions painted in black and white, are used.

As described above, in the conventional operation diagnosis system or method, many and expensive sensor elements are used for operation diagnosis. SUMMARY OF THE INVENTION An object of the present invention is to provide an operation diagnosis system for a disconnector / grounding switch that can easily and practically sufficiently fulfill the purpose of abnormality diagnosis using a few and inexpensive sensor elements.

[0007]

In order to solve the above-mentioned problems, in the present invention, as a basic configuration of an operation diagnosis system for a disconnector / grounding switch, a power source other than human power is used as a drive source, and The operation diagnostic system of the disconnector / grounding switch, which diagnoses whether the open / close operation of the disconnector or grounding switch where the power of the source is transmitted to the main contact via the rotary drive shaft is normal, An operation device of a disconnector or a grounding switch provided with a position sensor for detecting an operation start position and an operation end position, respectively, and a signal at an operation start time and a signal at an operation end time through the position sensor are input and both It is assumed that the system includes an operation time measurement device that measures a time between time points and an operation time diagnosis device that diagnoses whether the measured operation time is within a range of a management value and displays a diagnosis result.

[0008]

[0009] In the operation diagnostic system having the basic configuration as described above, the operating device of the disconnector or the earthing switch provided with the position sensor detects the temperature in the operating device outer box housing the operating device main body. It is extremely preferable to provide a temperature measuring means for measuring and to set the management value range of the operation time set in the operation time diagnosis device depending on the temperature in the outer casing of the operation device.

Alternatively, in the operation diagnosis system according to the above-described basic configuration, the operating device of the disconnector or the earthing switch provided with the position sensor is provided with a temperature for keeping the temperature inside the operating device outer box housing the operating device main body constant. It is more preferable to provide a control means. Further, in the operation diagnosis system according to the basic configuration, the operation device including the position sensor includes operation voltage measurement means for measuring an operation voltage supplied to the electric motor to generate a driving force on the electric motor. It is extremely preferable that the management value range of the operation time set in the apparatus is set depending on the operation voltage.

According to the number of disconnectors / grounding switches to be diagnosed, an operating time measuring device and an operating time diagnostic device are provided for all-phase collective operation of each disconnector or grounding switch or for each phase. One set for each operation device for operation, or an operation time measurement device for all operation devices for all phases of each disconnector or earthing switch or each operation device for each phase It is preferable to provide a system in which one set is installed for each of the switches and the operating time diagnosis device is installed in common for each disconnector and ground switch.

[0012]

According to the present invention, the disconnection time (from the opening command to the current from the opening command) can be applied to the case where the disconnecting switch or the earthing switch which is the object of the operation diagnosis does not switch the current before and after the current is switched depending on the application. The switchgear is a switchgear that does not require regulation in the operation of the power system, and the closing time and the closing time (the time from the closing command to the closing of the main contact) are not required. Related signals are not necessarily required, and the drive system (motor-reduction gear-
From the past experience, the rotary drive shaft-main contact) moves from the operation start position to the operation end position at a normal speed once it starts moving, even if there is sticking of the lubricant, unless the parts are damaged or deformed. To do.

Accordingly, the operation diagnostic system is provided with a disconnector or grounding switch operating device having a position sensor for detecting an operation start position and an operation end position of the main contact, respectively, and a signal at the start of operation via the position sensor. And an operation end measuring device for inputting a signal at the end of operation and measuring the time between both points of time, and diagnosing whether the measured operation time is within the range of the management value and displaying the diagnosis result With the configuration including the operation time diagnosis device, the purpose of operation diagnosis can be achieved simply and practically sufficiently. In addition, by configuring such an operation diagnosis system, the problem that operation failures cannot be accurately predicted in advance simply by performing a diagnosis at the time of periodic inspection or when necessary is easily solved. Alternatively, it is easily possible to always operate the grounding switch smoothly.

[0014]

Normally, in the operation time diagnosis device constituting the operation diagnosis system, when the control value range of the operation time for the operation diagnosis is determined to be normal operation in the test immediately after the production of the disconnector / grounding switch. The operation time is set so as to include all the operation times, and thereby, it is diagnosed whether or not the operation of the disconnector / grounding switch at the place of use is normal. However, for devices such as disconnectors and earthing switches that are always stationary and require very little inspection, they are also applied to the engagement points of the components to ensure smooth operation, and also serve as rust prevention. Since a high-viscosity lubricant such as grease capable of maintaining a lubricating function for a long period of time is used as the lubricant, the operation time varies due to a change in the viscosity of the lubricant due to a temperature change. If the operation time exceeds the fluctuation range, it is necessary to determine that there is an abnormality in the device even if the operation time is within the normal control value range and take measures to prevent the device from functioning. Is not enough. Therefore, as a specific configuration of the operation diagnosis system having the above basic configuration, a disconnector or a grounding switch operating device equipped with a position sensor is provided with a temperature measuring unit that measures the temperature in an operating device outer box that houses the operating device body. In addition, by providing a system in which the management value range of the operation time set in the operation time diagnosis device is set depending on the temperature inside the operation device outer box, more reliable operation diagnosis can be performed.

Alternatively, as a specific configuration of the operation diagnostic system according to the above basic configuration, an operating device of a disconnector or a grounding switch provided with a position sensor is used to maintain a constant temperature in an operating device outer box housing an operating body. If the system is equipped with the temperature control means, it is not necessary to set the control value range of the operation time depending on the temperature, so that the diagnostic system can be simplified. Since reliable control can be easily performed even in a strong environment such as electromagnetic induction or electrostatic induction like an electric station, the reliability of a diagnosis result is improved.

When the drive source for driving the main contact of the disconnector or the earthing switch is an electric motor, as a specific configuration of the operation diagnostic system having the above basic configuration, an operating device having a position sensor is driven by the electric motor. A system comprising an operating voltage measuring means for measuring an operating voltage supplied to an electric motor to generate a force, and a management value range of an operating time set in an operating time diagnostic device set depending on the operating voltage. By doing so, more reliable operation diagnosis can be performed as in the case where the management value range is set depending on the temperature.

Further, as an operation diagnosis system, an operation time measuring device and an operation time diagnosis device are provided in accordance with the number of target disconnecting switches or grounding switches, and an operating device for all-phase collective operation of each disconnecting switch or grounding switch. Alternatively, a system may be installed for each operation device for each phase operation, or the operation time measuring device may be an operation device for all-phase operation of each disconnector or earthing switch or each operation device for each phase operation. If one set is installed for each operating device and the operating time diagnostic device is installed as one set in common for each disconnector and grounding switch, when the number is small, the operating time measuring device and The operation time diagnosis device can be integrated with a programmable controller, for example, to integrate the entire diagnosis system at low cost. One set of devices is installed for each of the all-phase collective operation devices of each disconnector or grounding switch or each operation device of each phase operation, but the operating time diagnostic device uses this as, for example, a microcomputer. By installing one set in common for the disconnector and the earthing switch, the entire diagnostic system can be configured at low cost.

[0019]

FIG. 1 shows a first embodiment of the configuration of an operation diagnosis system according to the present invention. This embodiment shows one embodiment of a system configuration suitable when the number of disconnecting switches or grounding switches is small, and the outer box 2A of the operating device of the disconnecting switch 1
Is provided with a position sensor 5 that indicates an operation start position and an operation end position of a main contact 9 or a drive system from the electric motor 6 to the main contact 9 via the reduction gear 7 and the rotary drive shaft 8. The position sensor 5 is fixed to a disk (not shown) or a rotary drive shaft 8 coaxial with the gear 7B in a reduction gear 7 composed of a worm 7A and a gear 7B coaxially fixed to the rotating shaft of the electric motor 6. It comprises a movable contact 3 attached to the tip of a lever (not shown), and fixed contacts 4A and 4B attached to a fixed member in the operation device outer box 2A located near the movable contact 3. The fixed contacts 4A and 4B are contacts that come into contact with the movable contact 3 at the operation start position and the operation end position at the time of the closing operation of the main contact 9 or the drive system, or at the operation end position and the operation start position at the time of the breaking operation.

The measurement of the time from the start of operation to the closing operation of the disconnector 1 or the end of operation during the opening operation is performed by a circuit configuration as shown in FIG. In FIG.
Indicates a power supply for measurement. With such a circuit configuration, the output signal via the position sensor 5 is captured by the programmable controller 11 installed in the monitoring room 10, and the time from the start of operation of the main contact 9 or the drive system to the end of operation is measured. At the same time, it is diagnosed whether or not this time is within the range of the management value, and when the time is out of the range of the management value, the alarm lamp 12, which is a means for displaying an operation abnormality, is turned on.

FIG. 2 shows a second embodiment of the configuration of the operation diagnosis system according to the present invention. One embodiment of the configuration of the operation diagnosis system suitable for a case where there are many disconnectors and grounding switches to be diagnosed. Here is an example. The output signal via the position sensor 5 provided in the outer box 2A of each disconnector or the earthing switch for the three-phase collective operation or the individual operation for each phase is installed in the same outer box 2A. The operation time is measured by the operation time measuring device 15 and the operation time is measured.
It is sent to the microcomputer 21 installed inside.
The microcomputer 21 diagnoses whether or not the operation time sequentially sent from each operation device outer box 2A is within the range of the management value, and displays the diagnosis result on the CRT 22 on the screen. Thereby, the load of the operation time diagnosis processing in each operation device is reduced.

FIGS. 4 and 5 show a third embodiment of the operation diagnostic system according to the present invention. In this example,
The thermocouple 1 is placed in the operation box 2A for housing the main body of the operation device 2.
4 to detect the temperature inside the outer box 2A and input the temperature signal to the programmable controller 11,
As shown in FIG. 5, from the two operation time curves set at the upper and lower limits depending on the temperature, the input temperature signal is 17
In the case of (1), it is diagnosed whether or not the operation time obtained through the position sensor 5 is in the range of 17a to 17b. If the input temperature signal is 18, the operation time is 18a to 1
8b is diagnosed.
Conventionally, an operating time curve for operating time diagnosis corresponding to FIG. 5 is, as shown in FIG. 6, two straight lines parallel to the temperature axis, with the times 25a and 25b as upper and lower limits, respectively. The system of the present invention allows for a narrower control value range and more accurate diagnosis.

FIG. 7 shows a fourth embodiment of the operation diagnostic system configuration according to the present invention. In this embodiment, a thermocouple 14 and a space heater 24 are provided in an outer box 2A of an operation device, and a temperature signal of the thermocouple 14 is transmitted to the programmable controller 11.
, The electric power supplied to the space heater 24 is controlled by the programmable controller 11 to keep the temperature inside the outer box 2A constant, whereby the management value range of the operation time needs to have temperature dependence. It is not to be. This simplifies the operation time diagnosis system in the programmable controller. On the other hand, constant control of the temperature in the outer box 2A is possible without the influence of electromagnetic induction or electrostatic induction in an electric station. The advantage that the performance is improved is obtained.

FIG. 8 shows a fifth embodiment of the configuration of the operation diagnosis system according to the present invention. This system shows one embodiment of a system configuration in a case where a drive source of a disconnecting switch and a grounding switch main contact is an electric motor, and measures an operation voltage supplied to the electric motor in order to generate a driving force in the electric motor. As a means, the instrument transformer 16 is built in the controller outer box 2A,
By inputting the secondary-side output to the programmable controller 11, the position is calculated based on two operation time curves as shown in FIG. Sensor 5
Is performed to determine whether the operation time obtained through the operation is within the range of 19a to 19b or 20a to 20b. As described above, by applying the management value range depending on the operation voltage to the diagnosis of the operation time, more accurate operation diagnosis can be performed.

FIG. 10 shows a first application example of the configuration of the operation diagnosis system according to the present invention. In a disconnector and a grounding switch in which a driving force is transmitted to a main contact via a rotary drive shaft, a torque is generated in the rotary drive shaft immediately before the operation starts, and the torque disappears at the same time as the end of the operation. In this application example, a strain gauge 28 is attached to the rotary drive shaft 8 of the disconnector and the earthing switch using this phenomenon, and the strain gauge is provided with the function of a position sensor. When an abnormality is diagnosed at this time, it can be diagnosed whether the abnormality is on the main contact side of the rotary drive shaft or on the drive source side. For example, if the torque is excessive and the operation time is longer than the control value range, the abnormality is on the main contact side, and the torque is normal or too small and the operation time is longer than the control value range. In this case, it can be diagnosed that the abnormality is on the drive source side.

FIG. 11 shows a second application example of the present invention, and shows an example of a method of installing a position sensor when a driving source is a spring biased by an electric motor. In the example of this figure, the spring is formed as a compression spring and at the end of compression the drive disc 25
Becomes the dead center position of the rotation, and the opening operation or closing operation of the disconnector and the earthing switch starts from this dead center position, but the rotation speed of the driving disk 25 is slow near the dead center position, and the position sensor is located at the dead center position. , It is difficult to obtain accurate operation time. Therefore, by setting the position sensor at a position somewhat beyond the dead center position, more accurate operation diagnosis can be performed.

FIG. 12 shows another application example different from FIG. This example makes use of the point that, when the drive source is a motor, the operating current supplied to the motor for the drive operation is automatically cut off using a limit switch at the operation end of the disconnecting switch and the earthing switch, The operation time diagnosis device performs the operation diagnosis by replacing the time when the operation current starts to flow with the operation start time, and replacing the cutoff time with the operation end time. In order to realize this, the current transformer 29 for the instrument is used as the operating current measuring means.
Is provided in the monitoring room 10, and one of the power supply lines 30 is connected to the electric motor 6 through the primary winding of the
The next winding is connected to the programmable controller 11.

[0028]

As described above, according to the present invention, the disconnection time (opening time) can be reduced even when the disconnecting switch or the earthing switch does not switch the current before and after the current needs to be switched depending on the application. A switchgear that does not require regulation in the operation of the power system with the time from the pole command to the current interruption and the closing time (the time from the closing command to the closing of the main contact). And the signal related to the injection command is not always necessary, and the drive system (electric motor-reduction device-rotary drive shaft-main contact) is based on the experience of the prior art as long as the parts are not damaged or deformed. Focusing on moving from the operation start position to the operation end position at a normal speed once it starts moving even if there is sticking, etc., the operation diagnosis system detects the operation start position and operation end position of the main contact respectively. An operation time measuring device for inputting a signal at an operation start time and a signal at an operation end time via the position sensor and measuring a time between both operation times, and an operation device of a disconnector or a grounding switch having a sensor. And an operation time diagnosis device for diagnosing whether or not the measured operation time is within the range of the management value and displaying the diagnosis result. An operation diagnosis system capable of fulfilling the above requirements can be configured at low cost.
In addition, the results of the operation diagnosis are displayed on the display device of the operation time diagnosis device at any time, so that it is possible to know the malfunction of the operation without waiting for the periodic inspection, and to easily prevent the occurrence of accidents in advance. become. Further, since the inspection items by the operator can be omitted correspondingly, the efficiency of the maintenance work can be improved. In such a normal operation diagnosis, a plurality of main circuits in an electric substation such as a substation are usually parallelized. During the operation diagnosis, the operation of the main circuit is stopped, and the continuation of power transmission and reception remains. Since the diagnosis is performed through the main circuit and the diagnostic content is simple, there is a merit that the above-mentioned effect can be easily obtained whenever desired.

[0029]

Further, as an operation diagnosis system, a temperature measurement means is provided in an outer case of the operation device, and a system in which a management value range of operation time for operation diagnosis is set depending on temperature is provided. Is more accurately distinguished between normal and abnormal, and the reliability of diagnosis is improved. Furthermore, by performing the operation diagnosis while keeping the temperature inside the outer box of the operation device constant, it becomes unnecessary to set a management value range depending on the temperature, and the configuration of the operation time diagnosis device is simplified, On the other hand, the constant temperature control in the outer casing of the operation device can be performed without being affected by the environment even in an environment where electromagnetic induction or electrostatic induction is strong such as an electric station, so that the reliability of the diagnosis result is improved.

Further, by making the operation diagnosis system a system in which the management value range of the operation time for the operation diagnosis is set depending on the operation voltage, the normal and abnormal operation time can be distinguished more accurately. Thus, the reliability of diagnosis is improved.
Further, an operation diagnosis system is provided with one set of an operation time measuring device and an operation time diagnosis device for each disconnector or grounding switch for all-phase collective operation or each operation for each phase. With such a system, an operation diagnosis system for an electric station having a small number of disconnectors and grounding switches can be configured at low cost.

In addition, an operation diagnosis system is provided in which one set of operation time measuring devices is installed for each operation device for all-phase collective operation of each disconnector or earthing switch or each operation device for each phase operation. By using a system in which one set of diagnostic equipment is installed in common for each disconnector and grounding switch, the load of operating time diagnosis on individual operating devices in electric stations with a large number of disconnectors and grounding switches is reduced. Thus, an operation diagnosis system for an electric substation can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a first embodiment of an operation diagnosis system configuration according to the present invention.

FIG. 2 is a system configuration diagram showing a second embodiment of the operation diagnosis system configuration according to the present invention;

FIG. 3 is a circuit diagram showing a circuit configuration for measuring operation time in the operation diagnosis system according to the present invention;

FIG. 4 is a system configuration diagram showing a third embodiment of the operation diagnosis system configuration according to the present invention;

FIG. 5 is a view showing a method of setting an operation time management value range used in the operation diagnosis system shown in FIG. 4;

FIG. 6 is a diagram showing an operating time management value range used in a normal operating time diagnostic device.

FIG. 7 is a fourth diagram illustrating the configuration of the operating time diagnosis system according to the present invention;
Configuration diagram showing an embodiment of the present invention

FIG. 8 is a system configuration diagram showing a fifth embodiment of the operation diagnosis system configuration according to the present invention.

9 is a diagram showing a method of setting an operation time management value range used in the operation diagnosis system shown in FIG.

FIG. 10 is an operation diagnosis system configuration diagram showing a first application example of the operation diagnosis system according to the present invention.

FIG. 11 is a configuration diagram of an operation diagnosis system showing a second application example of the operation diagnosis system according to the present invention.

FIG. 12 is a configuration diagram of an operation diagnostic system showing an application example different from that of FIG. 10 of the operation diagnostic system according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disconnector 2 Actuator 2A outer case (operator outer case) 3 Movable contact 4A Fixed contact 4B Fixed contact 5 Position sensor 6 Motor 7 Reduction gear 8 Rotation drive shaft 9 Main contact 11 Programmable controller 12 Alarm light 14 Thermocouple (Temperature Measuring means) 15 Operating time measuring device 16 Instrument transformer (operating voltage measuring means) 21 Microcomputer 22 CRT (Display means) 23 Operating time diagnostic device 24 Space heater

Claims (5)

(57) [Claims] A power source means other than human power is used as a drive source, and whether the disconnection or grounding switch of a disconnector or a grounding switch in which the power of the drive source is transmitted to a main contact via a rotary drive shaft is normal. A system for diagnosing the operation of a disconnector or a grounding switch having a position sensor for detecting an operation start position and an operation end position of the main contact, respectively, and a signal at the time of operation start via the position sensor. An operation time measuring device that receives a signal at the end of the operation and measures the time between the two points of time, and an operation of diagnosing whether the measured operation time is within a management value range and displaying a diagnosis result. A time diagnostic device, and the operating device includes a temperature measuring unit that measures a temperature in an operating device outer box that stores the operating device main body, and includes an operating time set in the operating time diagnostic device. Control value range Disconnector-grounding switch operation diagnosis system, characterized in that it is set depending on the work unit outside the box internal temperature. 2. A method as claimed in claim 1, wherein a power generating means other than human power is used as a driving source, and whether a disconnecting switch or a grounding switch in which the power of the driving source is transmitted to a main contact through a rotary drive shaft is normal. A system for diagnosing the operation of a disconnector or a grounding switch having a position sensor for detecting an operation start position and an operation end position of the main contact, respectively, and a signal at the time of operation start via the position sensor. An operation time measuring device that receives a signal at the end of the operation and measures the time between the two points of time, and an operation of diagnosing whether the measured operation time is within a management value range and displaying a diagnosis result. A disconnection switch / grounding switch, comprising a time diagnosis device, wherein the operation device includes temperature control means for maintaining a constant temperature in an operation device outer box housing the operation device main body. Operation diagnostic system. 3. An open / close operation of a disconnector or a grounding switch in which a power generating means other than human power is used as a driving source and power of the driving source is transmitted to a main contact via a rotary drive shaft. A system for diagnosing the operation of a disconnector or a grounding switch having a position sensor for detecting an operation start position and an operation end position of the main contact, respectively, and a signal at the time of operation start via the position sensor. An operation time measuring device that receives a signal at the end of the operation and measures the time between the two points of time, and an operation of diagnosing whether the measured operation time is within a management value range and displaying a diagnosis result. A time diagnosis device, and when a drive source for driving a main contact of a disconnecting switch or a grounding switch is an electric motor, the operating device operates the operating voltage supplied to the electric motor to generate a driving force in the electric motor. Measure Provided with a work voltage measurement means,
An operation diagnosis system for a disconnecting switch / grounding switch, wherein a management value range of an operation time set in the operation time diagnosis device is set depending on an operation voltage. 4. A method as claimed in claim 1, wherein a power generating means other than human power is used as a drive source, and whether a disconnector or a grounding switch in which power of the drive source is transmitted to a main contact via a rotary drive shaft has a normal opening and closing operation. A system for diagnosing the operation of a disconnector or a grounding switch having a position sensor for detecting an operation start position and an operation end position of the main contact, respectively, and a signal at the time of operation start via the position sensor. An operation time measuring device that receives a signal at the end of the operation and measures the time between the two points of time, and an operation of diagnosing whether the measured operation time is within a management value range and displaying a diagnosis result. A time diagnostic device, and the operating time measuring device and the operating time diagnostic device are respectively connected to the operating devices for all-phase collective operation of each disconnector or the earthing switch or each operating device for each phase operation. One set Disconnector-grounding switch operation diagnosis system, characterized in that. 5. An open / close operation of a disconnector or a grounding switch in which a power generating means other than human power is used as a driving source and power of the driving source is transmitted to a main contact via a rotary drive shaft. A system for diagnosing the operation of a disconnector or a grounding switch having a position sensor for detecting an operation start position and an operation end position of the main contact, respectively, and a signal at the time of operation start via the position sensor. An operation time measuring device that receives a signal at the end of the operation and measures the time between the two points of time, and an operation of diagnosing whether the measured operation time is within a management value range and displaying a diagnosis result. A time diagnosis device, and one set of the operation time measurement device is installed for each of all disconnection or earthing switch operating devices for collectively operating all phases or operating devices for each phase. Operating time diagnosis Disconnector-grounding switch operation diagnosis system, characterized in that the device is installed one set common to the disconnector and grounding switch.