CN112363100B - Fault detection device of state monitoring sensor - Google Patents
Fault detection device of state monitoring sensor Download PDFInfo
- Publication number
- CN112363100B CN112363100B CN202011255947.9A CN202011255947A CN112363100B CN 112363100 B CN112363100 B CN 112363100B CN 202011255947 A CN202011255947 A CN 202011255947A CN 112363100 B CN112363100 B CN 112363100B
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- partial discharge
- discharge sensor
- movable cover
- cover plate
- mounting base
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The application provides a fault detection device for a state monitoring sensor, which can complete the live detection of faults of the state monitoring sensor of a capacitive device, improve the running stability of an online monitoring device, reduce the waste of manpower and material resources caused by low field inspection efficiency due to no effective detection means, and improve the working efficiency and the working quality. Therefore, the monitoring level of the insulation technology of the power grid equipment is effectively enhanced through on-site improvement, and the power supply reliability of the power grid is improved.
Description
Technical Field
The application relates to the technical field of substation equipment, in particular to a fault detection device of a state monitoring sensor.
Background
At present, various online monitoring devices are installed and operated in voltage class substations of kilovolts and more, wherein the online monitoring sensor terminals of capacitive equipment are approximately seven thousands or more. According to statistics, although test staff need to carry out inspection on the online monitoring device of the transformer substation content equipment every year, the reliability detection of the sensor cannot be carried out all the time because of no technical conditions, and the failure occurrence rate of the state monitoring sensor directly influences the accuracy and the reliability of the equipment operation state evaluation of operation and maintenance staff. Therefore, fault detection and investigation of the capacitive equipment state monitoring sensor is an effective way for improving the reliability of state monitoring measurement data, so that the effectiveness of state monitoring on state evaluation of the main equipment is improved.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
Therefore, the technical problem to be solved by the application is to overcome the defect that the capacitive equipment monitoring sensor in the prior art cannot detect, so as to provide a fault detection device of the state monitoring sensor.
In order to solve the technical problems, the application provides the following technical scheme: a fault detection device of a state monitoring sensor comprises,
the partial discharge sensor is arranged on the capacitive equipment and used for detecting the state of the capacitive equipment;
the fault detection module is connected with the partial discharge sensor through a secondary side circuit and used for monitoring the working state of the partial discharge sensor;
and the mounting assembly is arranged on the outer side of the partial discharge sensor and has a fixed state for fixing the partial discharge sensor.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the fault detection module comprises a processing module, a power supply module, an input module, an output module and a display module, wherein the input module is connected with the partial discharge sensor through the secondary side circuit.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the fault detection module inputs a power frequency current signal to the partial discharge sensor and receives a return signal of the partial discharge sensor through a secondary side circuit.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the mounting assembly includes
The mounting base is arranged on one side of the partial discharge sensor and comprises a mounting groove for mounting the sensor,
the movable cover plate is rotationally arranged on one side of the mounting base through a hinge shaft,
the control rod is arranged on the movable cover plate and comprises a trigger end contacted with the movable cover plate and a locking end detachably connected to the mounting base.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the mounting groove is internally provided with a clamping foot, and the partial discharge sensor is clamped in the clamping foot.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: and a crimping plate is arranged in the movable cover plate, and is contacted with the partial discharge sensor when the movable cover plate is buckled on the mounting base.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the clamping feet and the pressure welding plates are respectively provided with a positioning part extending towards the side wall of the partial discharge sensor, and when the movable cover plate is buckled on the mounting base, the pressure welding plates and the positioning parts of the clamping feet are staggered.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the movable cover plate is connected with the mounting base, one side of the movable cover plate is provided with a containing groove suitable for containing the trigger end, the trigger end is vertically connected with the locking end, the trigger end is provided with a torsion part, and the torsion part is arranged in the containing groove.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the torsion part is bent and raised from the trigger end, and the movable cover plate is buckled in the process of the mounting base, and the torsion part rotates relative to the trigger end.
As a preferable mode of the state monitoring sensor failure detection device of the present application, wherein: the mounting base is also provided with a locking groove, and when the movable cover plate is buckled on the mounting base, the locking end enters the locking groove.
The application has the beneficial effects that: the fault detection device for the state monitoring sensor can finish the live detection of the fault of the state monitoring sensor of the capacitive equipment, improve the running stability of the online monitoring device, reduce the waste of manpower and material resources caused by low field inspection efficiency due to no effective detection means, and improve the working efficiency and the working quality. Therefore, the monitoring level of the insulation technology of the power grid equipment is effectively enhanced through on-site improvement, and the power supply reliability of the power grid is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of the connection relationship of a state monitoring sensor fault detection device;
FIG. 2 is a schematic structural view of a mounting assembly;
FIG. 3 is a schematic view of a mounting base structure;
FIG. 4 is a schematic view of a removable cover;
FIG. 5 is a schematic view of the structure of the control lever;
description of the embodiments
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Examples
The present embodiment provides a fault detection device for a condition monitoring sensor, the connection relationship of the components of which is shown in fig. 1, including a partial discharge sensor 100, a fault detection module 200 and a mounting assembly 300. The partial discharge sensor 100 is arranged on the capacitive device and detects the state of the capacitive device; the fault detection module 200 is connected with the partial discharge sensor 100 through a secondary side circuit 110 and monitors the working state of the partial discharge sensor 100; the mounting unit 300 is provided outside the partial discharge sensor 100 and has a fixed state for fixing the partial discharge sensor 100. The fault detection module 200 includes a processing module 210, a power module 220, an input module 230, an output module 240, and a display module 250, wherein the input module 230 and the partial discharge sensor 100 are connected through the secondary side circuit 110. The fault detection module 200 inputs a power frequency current signal to the partial discharge sensor 100 and receives a return signal of the partial discharge sensor 100 through the secondary side circuit 110. Specifically, the output standard power frequency current signal device is designed to adopt 220V alternating current power supply, output alternating current signals and output current in the range of 0-1A. The display module 250 is a liquid crystal display screen, and displays three input/output signal waveforms. Output current signal gear: a range of 0 to 1mA and a range of 1mA to 1A; input signal (on-line device sensor secondary side analog signal) gear: 0-1 mA range;
| fault detector parameters | Measuring range | Accuracy of | Resolution ratio |
| Output current signal | 0~1000uA | -1%~+1% | 1uA |
| Output current signal | 1mA~1000mA | -1%~+1% | 1mA |
| Input signal | 0~1000uA | -1%~+1% | 1uA |
And carrying out signal filtering, amplification and display processing on signals acquired by the sensor, and realizing display, comparison and distortion degree analysis on output signals and input signals in the same waveform diagram. Comparing the output signals and the input signals, and calculating parameters such as amplitude comparison, waveform distortion rate, phase difference and the like. The detection auxiliary test loop is designed, so that three hollow sensors can be threaded and injected with standard current signals simultaneously. The output signal of the device can be amplitude-modulated by 0-10V and frequency-modulated by 0-1000 Hz, so that the output of power frequency and harmonic signals is realized. As shown in fig. 3, the mounting assembly 300 in this embodiment includes a mounting base 310, a removable cover 320, and a control lever 330, wherein the mounting base 310 is disposed on one side of the partial discharge sensor 100 and includes a mounting groove 311 for mounting the sensor. The movable cover 320 is rotatably disposed on one side of the mounting base 310 through a hinge shaft, and the movable cover 320 can rotate around one side of the mounting base 310 to complete the fastening and opening of the mounting base 310. A control lever 330 is provided on the movable cover 320 for controlling the movement of the movable cover 320, and includes a trigger end 331 contacting the movable cover 320, and a locking end 332 detachably connected to the mounting base 310. When the locking end 332 of the control lever 330 is moved, the trigger end 331 also rotates, and drives the movable cover 320 to rotate, thereby completing the engagement. As shown in fig. 3, a clamping pin 312 is disposed in the mounting groove 311, and the partial discharge sensor 100 is clamped in the clamping pin 312. The partial discharge sensor 100 in this embodiment is annular, and the clamping pins 312 are distributed along the annular shape and have a certain elasticity, so that the partial discharge sensor 100 is clamped inside. The movable cover plate 320 is internally provided with a pressing plate 321, when the movable cover plate 320 is buckled on the mounting base 310, the pressing plate 321 contacts with the partial discharge sensor 100, and the pressing plate 321 and the clamping pins 312 distributed up and down clamp the partial discharge sensor 100 in the middle, so that the partial discharge sensor 100 is fixed. In order to further increase stability, the clamping leg 312 and the pressing plate 321 are respectively provided with a positioning portion 323 extending toward the side wall of the partial discharge sensor 100, and when the movable cover 320 is fastened to the mounting base 310, the pressing plate 321 and the positioning portion 323 of the clamping leg 312 are staggered. Wherein the positioning portions 323 on the pressing plate 321 also have annular distribution. As shown in fig. 4, a receiving groove 322 adapted to receive the trigger end 331 is provided on a side of the movable cover 320 connected to the mounting base 310, the trigger end 331 is vertically connected to the locking end 332, a torsion portion 333 is provided on the trigger end 331, and the torsion portion 333 is disposed in the receiving groove 322. As shown in fig. 5, the trigger end 331 and the locking end 332 are elongated metal rods, the torsion portion 333 is bent and raised from the trigger end 331, and the torsion portion 333 rotates relative to the trigger end 331 when the movable cover 320 is fastened to the mounting base 310. The torsion portion 333 cannot continue to rotate under the restriction of the accommodation groove 322, and the metal rod of the trigger end 331 is axially twisted, so that the torsion portion 333 applies torque to the accommodation groove 322 and an impending pressure to the mounting base 310. So that the movable cover 320 maintains stable pressure contact with the mounting base 310. In order to stabilize the locking position, as shown in fig. 2 and 3, the mounting base 310 is further provided with a locking groove 313, and the locking end 332 enters the locking groove 313 when the movable cover 320 is fastened. By providing the mounting base 310 and the movable cover 320, the partial discharge sensor 100 can be completely wrapped inside, so that the partial discharge sensor is prevented from being interfered by the outside, and the detection stability of the partial discharge sensor 100 is ensured. It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims. Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application). It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure. It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (1)
1. The utility model provides a state monitoring sensor fault detection device which characterized in that: comprising the steps of (a) a step of,
the partial discharge sensor (100) is arranged on the capacitive equipment and used for detecting the state of the capacitive equipment;
the fault detection module (200) is connected with the partial discharge sensor (100) through a secondary side circuit (110) and is used for monitoring the working state of the partial discharge sensor (100);
a mounting unit (300) provided outside the partial discharge sensor (100) and having a fixed state in which the partial discharge sensor (100) is fixed;
the fault detection module (200) comprises a processing module (210), a power supply module (220), an input module (230), an output module (240) and a display module (250), wherein the input module (230) is connected with the partial discharge sensor (100) through the secondary side circuit (110);
the fault detection module (200) inputs a power frequency current signal to the partial discharge sensor (100) and receives a return signal of the partial discharge sensor (100) through a secondary side circuit (110);
the signals collected by the sensor are subjected to signal filtering, amplification and display processing, so that the output signals and the input signals are displayed, compared and analyzed in the same waveform diagram, and amplitude comparison, waveform distortion rate and phase difference are calculated for the output signals and the input signals;
the mounting assembly (300) comprises a mounting base (310) which is arranged on one side of the partial discharge sensor (100) and comprises a mounting groove (311) for mounting the sensor; the movable cover plate (320) is rotatably arranged on one side of the mounting base (310) through a hinge shaft; a control lever (330) provided on the movable cover plate (320) and including a trigger end (331) contacting the movable cover plate (320), and a locking end (332) detachably connected to the mounting base (310);
a clamping foot (312) is arranged in the mounting groove (311), and the partial discharge sensor (100) is clamped in the clamping foot (312); a crimping plate (321) is arranged in the movable cover plate (320), and when the movable cover plate (320) is buckled on the mounting base (310), the crimping plate (321) is contacted with the partial discharge sensor (100);
the clamping pins (312) and the pressure welding plate (321) are respectively provided with a positioning part (323) extending towards the side wall of the partial discharge sensor (100), and when the movable cover plate (320) is buckled on the mounting base (310), the positioning parts (323) of the clamping pins (312) and the pressure welding plate (321) are staggered;
the movable cover plate (320) is connected with the mounting base (310), one side of the movable cover plate is provided with a containing groove (322) which is suitable for containing the trigger end (331), the trigger end (331) is vertically connected with the locking end (332), the trigger end (331) is provided with a torsion part (333), the torsion part (333) is arranged in the containing groove (322), the torsion part (333) is bent and raised from the trigger end (331), and the movable cover plate (320) is buckled with the mounting base (310), and the torsion part (333) rotates relative to the trigger end (331);
the mounting base (310) is also provided with a locking groove (313), and when the movable cover plate (320) is buckled, the locking end (332) enters the locking groove (313).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011255947.9A CN112363100B (en) | 2020-11-11 | 2020-11-11 | Fault detection device of state monitoring sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011255947.9A CN112363100B (en) | 2020-11-11 | 2020-11-11 | Fault detection device of state monitoring sensor |
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| CN112363100A CN112363100A (en) | 2021-02-12 |
| CN112363100B true CN112363100B (en) | 2023-10-20 |
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Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06109864A (en) * | 1992-09-30 | 1994-04-22 | Toshiba Lighting & Technol Corp | Sensor device and lighting device |
| WO2009003361A1 (en) * | 2007-07-03 | 2009-01-08 | Xi'an Jiaotong University | An online partial discharge monitoring system of generator and method thereof |
| CN202995018U (en) * | 2012-11-21 | 2013-06-12 | 浙江省电力公司电力科学研究院 | Calibrating device of partial discharge detecting device |
| CN203133263U (en) * | 2012-09-17 | 2013-08-14 | 中国电力科学研究院 | Detection and verification device of transformer partial discharge and positioning monitoring assembly |
| CN105223530A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | High frequency partial discharge detector verification system and calibration method thereof |
| CN105425117A (en) * | 2015-10-08 | 2016-03-23 | 国家电网公司 | UHF partial discharge sensor accuracy detection system |
| CN107192929A (en) * | 2017-06-21 | 2017-09-22 | 贵州电网有限责任公司电力科学研究院 | The GIS Partial discharge signals source system and application method verified for superfrequency monitoring system |
| CN109142837A (en) * | 2018-09-30 | 2019-01-04 | 宁波中车时代传感技术有限公司 | A kind of new-energy automobile double-range current sensor |
| CN209044050U (en) * | 2018-07-18 | 2019-06-28 | 量质源检测有限公司 | A kind of calibration detection apparatus of time current table |
| CN209086290U (en) * | 2018-11-07 | 2019-07-09 | 国网河南省电力公司焦作供电公司 | A kind of fixation device of the extra-high video sensor of GIS disc insulator |
| CN110161386A (en) * | 2019-05-06 | 2019-08-23 | 贵州电网有限责任公司 | A kind of portable high-pressure cable connector local discharge detection device and method |
| CN210323243U (en) * | 2019-05-22 | 2020-04-14 | 云南电网有限责任公司西双版纳供电局 | Fault indicator with built-in double coils |
| CN210439777U (en) * | 2019-08-14 | 2020-05-01 | 贵州电网有限责任公司 | Transformer overhauls safety protective guard |
| CN210690631U (en) * | 2019-06-19 | 2020-06-05 | 无锡群欣物联科技有限公司 | Wireless sensor protection assembly for intelligent power distribution monitoring system |
| CN210720637U (en) * | 2019-07-23 | 2020-06-09 | 长缆电工科技股份有限公司 | Cable joint partial discharge monitoring sensor and cable joint partial discharge monitoring system |
| CN210982514U (en) * | 2019-07-24 | 2020-07-10 | 三河市鼎科远图科技有限公司 | Power line detection equipment casing and power line detection equipment |
| CN111812561A (en) * | 2020-07-24 | 2020-10-23 | 方舟 | Hall sensor |
| CN111812475A (en) * | 2020-08-29 | 2020-10-23 | 河南四达电力设备股份有限公司 | Partial discharge detection module of cable intermediate joint distributed on-line monitoring device |
| CN211804583U (en) * | 2020-02-26 | 2020-10-30 | 昆山铭世特精密机械有限公司 | Coil welding fixture |
| CN111856083A (en) * | 2020-07-09 | 2020-10-30 | 广东电网有限责任公司 | A supplementary installation device of sensor for test is put in office |
-
2020
- 2020-11-11 CN CN202011255947.9A patent/CN112363100B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06109864A (en) * | 1992-09-30 | 1994-04-22 | Toshiba Lighting & Technol Corp | Sensor device and lighting device |
| WO2009003361A1 (en) * | 2007-07-03 | 2009-01-08 | Xi'an Jiaotong University | An online partial discharge monitoring system of generator and method thereof |
| CN203133263U (en) * | 2012-09-17 | 2013-08-14 | 中国电力科学研究院 | Detection and verification device of transformer partial discharge and positioning monitoring assembly |
| CN202995018U (en) * | 2012-11-21 | 2013-06-12 | 浙江省电力公司电力科学研究院 | Calibrating device of partial discharge detecting device |
| CN105425117A (en) * | 2015-10-08 | 2016-03-23 | 国家电网公司 | UHF partial discharge sensor accuracy detection system |
| CN105223530A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | High frequency partial discharge detector verification system and calibration method thereof |
| CN107192929A (en) * | 2017-06-21 | 2017-09-22 | 贵州电网有限责任公司电力科学研究院 | The GIS Partial discharge signals source system and application method verified for superfrequency monitoring system |
| CN209044050U (en) * | 2018-07-18 | 2019-06-28 | 量质源检测有限公司 | A kind of calibration detection apparatus of time current table |
| CN109142837A (en) * | 2018-09-30 | 2019-01-04 | 宁波中车时代传感技术有限公司 | A kind of new-energy automobile double-range current sensor |
| CN209086290U (en) * | 2018-11-07 | 2019-07-09 | 国网河南省电力公司焦作供电公司 | A kind of fixation device of the extra-high video sensor of GIS disc insulator |
| CN110161386A (en) * | 2019-05-06 | 2019-08-23 | 贵州电网有限责任公司 | A kind of portable high-pressure cable connector local discharge detection device and method |
| CN210323243U (en) * | 2019-05-22 | 2020-04-14 | 云南电网有限责任公司西双版纳供电局 | Fault indicator with built-in double coils |
| CN210690631U (en) * | 2019-06-19 | 2020-06-05 | 无锡群欣物联科技有限公司 | Wireless sensor protection assembly for intelligent power distribution monitoring system |
| CN210720637U (en) * | 2019-07-23 | 2020-06-09 | 长缆电工科技股份有限公司 | Cable joint partial discharge monitoring sensor and cable joint partial discharge monitoring system |
| CN210982514U (en) * | 2019-07-24 | 2020-07-10 | 三河市鼎科远图科技有限公司 | Power line detection equipment casing and power line detection equipment |
| CN210439777U (en) * | 2019-08-14 | 2020-05-01 | 贵州电网有限责任公司 | Transformer overhauls safety protective guard |
| CN211804583U (en) * | 2020-02-26 | 2020-10-30 | 昆山铭世特精密机械有限公司 | Coil welding fixture |
| CN111856083A (en) * | 2020-07-09 | 2020-10-30 | 广东电网有限责任公司 | A supplementary installation device of sensor for test is put in office |
| CN111812561A (en) * | 2020-07-24 | 2020-10-23 | 方舟 | Hall sensor |
| CN111812475A (en) * | 2020-08-29 | 2020-10-23 | 河南四达电力设备股份有限公司 | Partial discharge detection module of cable intermediate joint distributed on-line monitoring device |
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| Publication number | Publication date |
|---|---|
| CN112363100A (en) | 2021-02-12 |
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