WO2024047840A1 - Dispositif de détermination et procédé de détermination - Google Patents

Dispositif de détermination et procédé de détermination Download PDF

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Publication number
WO2024047840A1
WO2024047840A1 PCT/JP2022/032943 JP2022032943W WO2024047840A1 WO 2024047840 A1 WO2024047840 A1 WO 2024047840A1 JP 2022032943 W JP2022032943 W JP 2022032943W WO 2024047840 A1 WO2024047840 A1 WO 2024047840A1
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WO
WIPO (PCT)
Prior art keywords
vacuum
tank
pressure
temperature
partial discharge
Prior art date
Application number
PCT/JP2022/032943
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English (en)
Japanese (ja)
Inventor
健 岩城
寿樹 林
秀人 大木
坂本　千秋
Original Assignee
日新電機株式会社
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Priority to PCT/JP2022/032943 priority Critical patent/WO2024047840A1/fr
Publication of WO2024047840A1 publication Critical patent/WO2024047840A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/668—Means for obtaining or monitoring the vacuum
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects

Definitions

  • One aspect of the present invention relates to a determination device that determines vacuum deterioration of a vacuum valve.
  • a vacuum valve vacuum interrupter
  • the vacuum valve is installed, for example, in a vacuum circuit breaker provided in power cutoff equipment to cut off an electric circuit.
  • a vacuum valve when the degree of vacuum inside the vacuum container decreases, the insulation performance, that is, the shutoff performance decreases. Therefore, there is a need for a technique for determining a decrease in the degree of vacuum inside a vacuum container.
  • Patent Document 1 discloses a vacuum deterioration monitoring device that includes a pressure measurement container (insulating holder) with an airtight structure that houses a vacuum valve, and pressure detection means that detects pressure changes within the pressure measurement container. There is.
  • a vacuum leak occurs in the vacuum valve
  • the insulating gas in the pressure measurement container flows into the vacuum valve, and the pressure in the pressure measurement container decreases.
  • the pressure detection means detects vacuum deterioration of the vacuum valve by detecting such a decrease in pressure within the pressure measurement container.
  • Patent Document 1 there is a possibility that a decrease in the pressure inside the pressure measurement container due to pressure leakage in the pressure measurement container may be mistakenly determined as vacuum deterioration of the vacuum valve. Furthermore, if the vacuum valve deteriorates due to shock caused by an arc generated during normal operation (opening operation), the arc continues within the vacuum valve even after the pair of contacts are separated. As a result, the temperature of the gas within the pressure measurement container increases, and the pressure within the pressure measurement container also increases. In this case, there is a problem that a decrease in pressure within the pressure measurement container cannot be detected, and vacuum deterioration of the vacuum valve cannot be detected.
  • One aspect of the present invention has been made in view of the above problems, and its purpose is to appropriately determine vacuum deterioration of a vacuum valve.
  • a determination device includes an acquisition unit that acquires the temperature or pressure in a first tank of a circuit breaker, and based on the temperature or pressure in the first tank, and a determination unit that determines the presence or absence of an arc that occurs due to vacuum deterioration of the vacuum valve housed in the first tank.
  • a determination method includes an acquisition step of acquiring the temperature or pressure in a first tank of a circuit breaker, and based on the temperature or pressure in the first tank, The method further includes a determination step of determining the presence or absence of an arc that occurs due to vacuum deterioration of the vacuum valve housed in the first tank.
  • a change in the degree of vacuum of a vacuum container can be appropriately determined.
  • FIG. 1 is a schematic diagram showing the configuration of main parts of a determination system according to an embodiment of the present invention. It is a block diagram showing the composition of the judgment device of the above-mentioned judgment system. It is a figure showing the change of the pressure in a vacuum valve. 2 is a flowchart illustrating an example of a process in which the determination device determines vacuum deterioration of a vacuum valve.
  • FIG. 1 is a schematic diagram showing the main configuration of a determination system 1000.
  • the determination system 1000 includes a detection device 100 and a circuit breaker 5.
  • the configuration of the circuit breaker 5 will be described below.
  • the circuit breaker 5 (switching device) includes a tank 50 (first tank), a first electrical circuit 51, and a second electrical circuit 52.
  • FIG. 1 is a schematic diagram, and illustration of a part of the second electric circuit 52 is omitted.
  • the circuit breaker 5 is used, for example, to cut off an electric circuit in power cutoff equipment.
  • the circuit breaker 5 is, for example, a vacuum circuit breaker (VCB).
  • the tank 50 is a closed tank that accommodates a vacuum valve 60, which will be described later.
  • the tank 50 is filled with an insulating gas (eg, dry air).
  • the pressure of the insulating gas in the tank 50 is higher than atmospheric pressure, thereby improving the insulation of the vacuum valve 60.
  • the first electrical circuit 51 is one (upper side in FIG. 1) of the electrical circuit in the power cutoff equipment.
  • the second electrical circuit 52 is the other electrical circuit (on the right side in FIG. 1) in the power cutoff facility.
  • the first electric path 51 and the second electric path 52 penetrate the tank 50 and are introduced into the tank 50.
  • a tank 50A (second tank) different from the tank 50 is provided above the tank 50.
  • the tank 50A is also a closed tank, and is filled with gas at a predetermined pressure.
  • the first electric circuit 51 penetrates the interface between the tank 50 and the tank 50A while maintaining the airtightness of the tank 50 and the tank 50A. That is, the tank 50 and the tank 50A are electrically connected through the first electric circuit 51. Note that in FIG. 1, illustration of the first electric circuit 51 in the tank 50A is omitted.
  • a tank 50B (not shown) different from the tank 50 is provided on the side of the tank 50, and the tank 50 and the tank 50B are electrically connected through a second electric circuit 52.
  • the vacuum valve 60 includes a vacuum container 61 and a pair of contacts (not shown).
  • the vacuum container 61 is maintained at a predetermined degree of vacuum and accommodates a pair of contacts connected to the first electric circuit 51 and the second electric circuit 52, respectively.
  • the pair of contacts is configured to be connected or disconnected (opening/closing operation of the vacuum valve 60) by the operation of an operating section (not shown).
  • the determination system 1000 determines a decrease (change) in the degree of vacuum in the vacuum container 61.
  • a detection device 100 is provided for this purpose.
  • the detection device 100 includes a determination device 1, a coaxial cable 2, a partial discharge sensor 4, a temperature sensor 3a, and a pressure sensor 3b.
  • the partial discharge sensor 4, temperature sensor 3a, and pressure sensor 3b will be collectively referred to as sensors.
  • the determination device 1 is connected to a sensor by a coaxial cable 2.
  • the sensor is provided inside the tank 50 while ensuring insulation from the vacuum valve 60.
  • the determination device 1 determines vacuum deterioration of the vacuum valve 60 using physical information detected by the sensor.
  • the partial discharge sensor 4 is a sensor that detects such partial discharge. Specifically, the partial discharge sensor 4 is a sensor that detects a partial discharge signal (for example, electromagnetic waves, ground line current, or TEV (Transition Earth Voltage)) accompanying partial discharge. When the partial discharge sensor 4 detects partial discharge, the determination device 1 determines that the degree of vacuum in the vacuum container 61 has decreased.
  • a partial discharge signal for example, electromagnetic waves, ground line current, or TEV (Transition Earth Voltage)
  • the pressure within the vacuum container 61 eventually reaches pressure equilibrium near the original pressure within the tank 50. It is known that when the pressure inside the vacuum container 61 becomes equal to or higher than a predetermined pressure, the partial discharge that was occurring up to that point will no longer occur. Therefore, if vacuum deterioration rapidly progresses from the normal vacuum state of the vacuum vessel 61 to a state where the pressure is balanced to near the original pressure inside the tank 50, the partial discharge sensor 4 may not be able to detect partial discharge. be.
  • the temperature and pressure of the gas inside and in the tank 50 increase over time.
  • the temperature sensor 3a and the pressure sensor 3b are sensors that detect increases in the temperature and pressure of the gas in the tank 50, respectively.
  • the determination device 1 determines that an overheating abnormality has occurred in the tank 50 due to the vacuum deterioration state of the vacuum valve 60 or other factors. .
  • the determination device 1 determines the vacuum deterioration state of the vacuum valve 60.
  • FIG. 1 shows an example in which the temperature sensor 3a is installed inside the tank 50, the temperature sensor 3a may be installed on the outer wall of the tank 50.
  • FIG. 2 is a block diagram showing the configuration of the determination device 1.
  • the determination device 1 includes an acquisition section 10, a determination section 20, an alarm section 30, and a storage section 40.
  • the determination device 1 determines vacuum deterioration of the vacuum valve 60 in the circuit breaker 5.
  • the vacuum valve 60 in which the vacuum state is maintained and the tank 50 that accommodates the vacuum valve 60 will be referred to as a normal vacuum container 61 and a normal tank 50, respectively.
  • the acquisition unit 10 includes a partial discharge detection circuit 11, a temperature detection circuit 12a, and a pressure detection circuit 12b.
  • the acquisition unit 10 acquires the output signal output by the sensor.
  • the acquisition unit 10 generates a processed signal by performing predetermined processing on the output signal.
  • the acquisition unit 10 outputs the processed signal to the determination unit 20.
  • the circuit breaker 5 only needs to be provided with either the temperature sensor 3a or the pressure sensor 3b. That is, the acquisition unit 10 may include either the temperature detection circuit 12a or the pressure detection circuit 12b in accordance with the sensor provided in the circuit breaker 5.
  • the partial discharge detection circuit 11 is a circuit for acquiring a partial discharge signal accompanying a partial discharge occurring within the vacuum bulb 60.
  • the partial discharge detection circuit 11 acquires the high frequency signal that the partial discharge sensor 4 receives.
  • the partial discharge detection circuit 11 applies a known filter to the high frequency signal to pass signal components in a predetermined frequency band (for example, a frequency band from the HF band to the VHF band). Thereby, the partial discharge detection circuit 11 can extract waveform data of electromagnetic waves accompanying partial discharge.
  • the partial discharge detection circuit 11 outputs a high frequency signal in a predetermined frequency band to the determination unit 20 as a processed signal. Further, the partial discharge detection circuit 11 may constantly monitor the presence or absence of a partial discharge signal and store a high frequency signal in a predetermined frequency band in the storage unit 40.
  • the temperature detection circuit 12a is a circuit for obtaining the temperature T inside the tank 50 of the circuit breaker 5.
  • the temperature detection circuit 12a acquires an output signal output by the temperature sensor 3a (for example, if the temperature sensor 3a is a resistance temperature sensor, the voltage across the resistance temperature sensor).
  • the temperature detection circuit 12a identifies the temperature T within the tank 50 sensed by the temperature sensor 3a based on the output signal.
  • the temperature detection circuit 12a outputs the identified temperature T inside the tank 50 to the determination unit 20 as a processed signal. Further, the temperature detection circuit 12a may always obtain the temperature T in the tank 50 and store it in the storage unit 40.
  • the temperature detection circuit 12a may acquire an output signal output by a temperature sensor (not shown) provided in a tank 50A different from the tank 50.
  • the temperature detection circuit 12a also specifies the temperature TA in the tank 50A and outputs it to the determination unit 20.
  • the pressure detection circuit 12b is a circuit for acquiring the pressure inside the tank 50 of the circuit breaker 5.
  • the temperature detection circuit 12a specifies the temperature T in the tank 50 of the circuit breaker 5 and outputs it to the determination section 20
  • the pressure detection circuit 12b specifies the pressure in the tank 50 of the circuit breaker 5 and outputs it to the determination section 20. output to section 20.
  • the determination unit 20 determines whether the partial discharge sensor 4 has detected a partial discharge. For example, the determination unit 20 determines whether the intensity I of the high frequency signal in a predetermined frequency band is equal to or greater than the threshold Th0, based on the waveform data output by the partial discharge detection circuit 11. If the intensity I is greater than or equal to the threshold Th0, it is determined that the partial discharge sensor 4 has detected a partial discharge (that is, the degree of vacuum of the vacuum valve 60 has decreased). Moreover, in addition to commercial synchronization as a determination condition, detection accuracy can be further improved.
  • the determination unit 20 determines vacuum deterioration of the vacuum valve 60 based on the temperature T inside the tank 50. For example, the determination unit 20 determines whether the temperature T in the tank 50 output by the temperature detection circuit 12a is equal to or higher than the threshold Th1. If the temperature T is equal to or higher than the threshold Th1, it is determined that an arc is occurring within the vacuum valve 60 (that is, the degree of vacuum in the vacuum valve 60 is decreasing). Note that the determination unit 20 may determine the threshold Th1 according to the surrounding environment (for example, the temperature of the outside air). Furthermore, the determination unit 20 determines whether or not an arc is occurring within the vacuum valve 60 by comparing the temperature T within the tank 50 and the temperature TA within the tank 50A, which is in the same environment as the tank 50.
  • the determination unit 20 determines that an arc is occurring within the vacuum valve 60. Thereby, even if the temperature T of the tank 50 during normal operation changes depending on the surrounding environment of the circuit breaker 5, it is possible to appropriately determine the increase in the temperature T within the vacuum valve 60 due to the arc.
  • the determination unit 20 determines vacuum deterioration of the vacuum valve 60 based on the pressure within the tank 50. For example, the determination unit 20 determines whether the pressure P in the tank 50 output by the pressure detection circuit 12b is equal to or higher than the threshold Th2. If the pressure P is equal to or greater than the threshold value Th2, it is determined that an arc is occurring within the vacuum valve 60 (that is, the degree of vacuum in the vacuum valve 60 is decreasing).
  • the alarm unit 30 Based on the determination result of the determination unit 20, the alarm unit 30 notifies the outside that the degree of vacuum in the vacuum valve 60 is decreasing. Further, the alarm unit 30 outputs an interlock indicating that the degree of vacuum of the vacuum valve 60 is decreasing.
  • the storage unit 40 stores various data used by the determination device 1.
  • the storage unit 40 stores, for example, a threshold value for determination by the determination unit 20 in advance.
  • the storage unit 40 also stores the temperature T and pressure P inside the tank 50 output by the temperature detection circuit 12a and the pressure detection circuit 12b.
  • FIG. 3 is a diagram showing changes in the pressure inside the vacuum valve 60 when the vacuum valve 60 deteriorates.
  • the pressure within the vacuum valve 60 increases over time as the insulating gas within the tank 50 flows into the vacuum valve 60.
  • the pressure inside the vacuum valve 60 becomes a predetermined first pressure P1 at time t1, a predetermined second pressure P2 (approximately atmospheric pressure) at time t2, and finally becomes equal to the pressure P3 inside the tank 50.
  • the determination device 1 When the pressure within the vacuum valve 60 is below the predetermined first pressure P1, no partial discharge occurs within the vacuum valve 60 even if a commercial voltage is applied to the pair of contacts. Therefore, the determination device 1 does not detect a partial discharge signal associated with partial discharge until time t1, and determines that the vacuum container 61 maintains a vacuum state.
  • the determination device 1 can detect a partial discharge signal associated with partial discharge between time t1 and time t2.
  • the partial discharge may disappear. Therefore, for example, when the pressure inside the vacuum bulb increases rapidly, the time during which the determination device 1 can detect a partial discharge signal is short, so there is a possibility that the partial discharge detection circuit 11 may miss the detection of the partial discharge signal. There is.
  • the determination unit 20 determines whether or not an arc is generated within the vacuum valve 60 based on the temperature and pressure within the tank 50. . That is, the determination device 1 determines the vacuum valve 60 based not only on the partial discharge detected by the partial discharge sensor 4 but also on the temperature T and pressure P of the gas in the tank 50 detected by the temperature sensor 3a and the pressure sensor 3b, respectively. Determine the vacuum deterioration of. This can serve as a backup in case the partial discharge sensor 4 is unable to detect partial discharge before the pressure of the gas in the vacuum container 61 reaches the predetermined second pressure P2.
  • FIG. 4 is a flowchart showing an example of a process in which the determination device 1 determines vacuum deterioration of the vacuum valve 60. Referring to FIG. 4, an operation example in which the determination device 1 determines vacuum deterioration of the vacuum valve 60 based on the temperature T in the tank 50, the pressure P in the tank 50, and the partial discharge signal will be described below.
  • the partial discharge detection circuit 11 acquires the partial discharge signal received by the partial discharge sensor 4 (S1).
  • the partial discharge detection circuit 11 performs predetermined processing on the partial discharge signal and outputs it to the determination section 20 .
  • the temperature detection circuit 12a and the pressure detection circuit 12b obtain output signals output from the temperature sensor 3a and the pressure sensor 3b, respectively (obtaining step S2).
  • the temperature detection circuit 12a and the pressure detection circuit 12b respectively specify the temperature T and pressure P in the tank 50 and output them to the determination section 20.
  • the determination unit 20 determines whether the partial discharge sensor 4 has detected a partial discharge (S3). If it is determined that the partial discharge sensor 4 has detected a partial discharge (YES in S3), the determination unit 20 determines that the degree of vacuum in the vacuum valve 60 is decreasing. Thereafter, the alarm unit 30 outputs an interlock indicating that the degree of vacuum in the vacuum valve 60 is decreasing (S5).
  • the determination unit 20 determines whether or not the arc continues based on the temperature T and pressure P in the tank 50. . That is, the determination unit 20 determines whether the temperature T in the tank 50 is greater than or equal to the threshold Th1, and whether the pressure in the tank 50 is greater than or equal to the threshold Th2 (determination step S4). If the temperature T in the tank 50 is greater than or equal to the threshold Th1, or if the pressure P in the tank 50 is greater than or equal to the threshold Th2 (YES in S4), the determination unit 20 determines that the arc is continuing. Thereafter, the alarm unit 30 outputs an interlock indicating that the arc is continuing (S5).
  • the determination unit 20 determines that the vacuum state of the vacuum valve 60 is maintained. do. After that, the process returns to S1. That is, the determination device 1 constantly monitors the presence or absence of a partial discharge signal and the temperature T and pressure P in the tank 50 during the monitoring period.
  • the determination device 1 can detect the occurrence of an arc in the vacuum valve 60 by monitoring the temperature T and pressure P inside the tank 50. Thereby, it is possible to appropriately determine the presence or absence of an arc that occurs due to vacuum deterioration of the vacuum valve 60.
  • the partial discharge detection circuit 11 misses detection of a partial discharge signal, by monitoring the temperature T and pressure P in the tank 50, it is possible to detect whether or not there is an arc occurring due to vacuum deterioration of the vacuum valve. can be appropriately determined. Further, the partial discharge signal can be detected immediately after the vacuum bulb deteriorates under vacuum (immediately after time t1 in FIG. 3). Therefore, by also detecting the partial discharge signal, it becomes possible to quickly diagnose vacuum deterioration of the vacuum valve.
  • the function of the determination device 1 (hereinafter referred to as the "device") is a program for making a computer function as the device, and makes the computer function as each control block (particularly the acquisition unit 10 and the determination unit 20) of the device. This can be realized by a program for
  • the device includes a computer having at least one control device (for example, a processor) and at least one storage device (for example, a memory) as hardware for executing the program.
  • control device for example, a processor
  • storage device for example, a memory
  • the above program may be recorded on one or more computer-readable recording media instead of temporary.
  • This recording medium may or may not be included in the above device. In the latter case, the program may be supplied to the device via any transmission medium, wired or wireless.
  • each of the control blocks described above can also be realized by a logic circuit.
  • a logic circuit for example, an integrated circuit in which a logic circuit functioning as each of the control blocks described above is formed is also included in the scope of the present invention.
  • each process described in each of the above embodiments may be executed by AI (Artificial Intelligence).
  • AI Artificial Intelligence
  • the AI may operate on the control device, or may operate on another device (for example, an edge computer or a cloud server).
  • the determination device includes an acquisition unit that acquires the temperature or pressure in a first tank of a circuit breaker, and a vacuum contained in the first tank based on the temperature or pressure in the first tank.
  • a determination unit that determines the presence or absence of an arc that occurs due to vacuum deterioration of the bulb.
  • the acquisition unit acquires a partial discharge signal accompanying a partial discharge occurring within the vacuum bulb
  • the determination unit determines vacuum deterioration of the vacuum bulb based on the partial discharge signal
  • the acquisition unit determines vacuum deterioration of the vacuum bulb based on the partial discharge signal.
  • the determination unit may determine whether an arc occurs due to vacuum deterioration of the vacuum valve based on the temperature or pressure within the first tank.
  • the determination unit may determine whether or not an arc occurs due to vacuum deterioration of the vacuum valve when the temperature or pressure within the first tank is equal to or higher than a threshold value.
  • the acquisition unit acquires a temperature or pressure in a second tank different from the first tank, and the determination unit determines the temperature or pressure in the first tank and the temperature or pressure in the second tank.
  • the presence or absence of an arc generated due to vacuum deterioration of the vacuum valve may be determined by comparing the above.
  • a determination method includes an acquisition step of acquiring the temperature or pressure in a first tank of a circuit breaker, and a vacuum contained in the first tank based on the temperature or pressure in the first tank.
  • the method includes a determination step of determining the presence or absence of an arc that occurs due to vacuum deterioration of the bulb.
  • Determination device 5 Circuit breaker 10 Acquisition unit 20 Determination unit 50 Tank (first tank) 50A tank (second tank) 60 Vacuum valve

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

Ce dispositif de détermination (1) comprend une unité d'acquisition (10) qui acquiert la température ou la pression à l'intérieur d'un réservoir (50) d'un disjoncteur (5), et une unité de détermination (20) qui détermine, sur la base de la température ou de la pression à l'intérieur du réservoir, la présence d'un arc qui est généré accompagnant la détérioration sous vide d'une soupape à vide (60) logée à l'intérieur du réservoir. Le dispositif de détermination (1) est capable de déterminer de manière appropriée un changement du degré de vide dans un récipient sous vide.
PCT/JP2022/032943 2022-09-01 2022-09-01 Dispositif de détermination et procédé de détermination WO2024047840A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/032943 WO2024047840A1 (fr) 2022-09-01 2022-09-01 Dispositif de détermination et procédé de détermination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/032943 WO2024047840A1 (fr) 2022-09-01 2022-09-01 Dispositif de détermination et procédé de détermination

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WO2024047840A1 true WO2024047840A1 (fr) 2024-03-07

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63318034A (ja) * 1987-06-18 1988-12-26 Hitachi Ltd 真空開閉装置の真空劣化検出装置
CN202110032U (zh) * 2011-05-05 2012-01-11 山东鲁亿通智能电气股份有限公司 一种真空度在线监测装置及真空度在线监测系统
CN102426076A (zh) * 2011-08-25 2012-04-25 遵义长征电器开关设备有限责任公司 12kV真空灭弧室在线检测真空度、温度的方法
JP2012150970A (ja) * 2011-01-18 2012-08-09 Chugoku Electric Power Co Inc:The 真空バルブ及びタンク形真空遮断器
WO2012157134A1 (fr) * 2011-05-13 2012-11-22 三菱電機株式会社 Dispositif pour détecter une détérioration de degré de vide de dispositif d'ouverture et de fermeture hermétique
WO2014091926A1 (fr) * 2012-12-12 2014-06-19 三菱電機株式会社 Appareil de surveillance de détérioration de vide
US20150325394A1 (en) * 2014-05-12 2015-11-12 Cooper Technologies Company Vacuum loss detection
CN110491721A (zh) * 2019-09-25 2019-11-22 辽宁工程技术大学 一种内置触头式真空断路器真空度在线监测装置及方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63318034A (ja) * 1987-06-18 1988-12-26 Hitachi Ltd 真空開閉装置の真空劣化検出装置
JP2012150970A (ja) * 2011-01-18 2012-08-09 Chugoku Electric Power Co Inc:The 真空バルブ及びタンク形真空遮断器
CN202110032U (zh) * 2011-05-05 2012-01-11 山东鲁亿通智能电气股份有限公司 一种真空度在线监测装置及真空度在线监测系统
WO2012157134A1 (fr) * 2011-05-13 2012-11-22 三菱電機株式会社 Dispositif pour détecter une détérioration de degré de vide de dispositif d'ouverture et de fermeture hermétique
CN102426076A (zh) * 2011-08-25 2012-04-25 遵义长征电器开关设备有限责任公司 12kV真空灭弧室在线检测真空度、温度的方法
WO2014091926A1 (fr) * 2012-12-12 2014-06-19 三菱電機株式会社 Appareil de surveillance de détérioration de vide
US20150325394A1 (en) * 2014-05-12 2015-11-12 Cooper Technologies Company Vacuum loss detection
CN110491721A (zh) * 2019-09-25 2019-11-22 辽宁工程技术大学 一种内置触头式真空断路器真空度在线监测装置及方法

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