CN207215980U - Fault simulation test device for high-voltage switch equipment - Google Patents
Fault simulation test device for high-voltage switch equipment Download PDFInfo
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- CN207215980U CN207215980U CN201721256858.XU CN201721256858U CN207215980U CN 207215980 U CN207215980 U CN 207215980U CN 201721256858 U CN201721256858 U CN 201721256858U CN 207215980 U CN207215980 U CN 207215980U
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- 238000012806 monitoring device Methods 0.000 claims abstract description 26
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Abstract
The utility model discloses a high tension switchgear trouble analogue test device relates to the electrical technology field for effectively establish the divide closing coil fingerprint storehouse in the high tension switchgear, with the latent trouble of discerning high tension switchgear in advance, improve electric power system's operational reliability. The high-voltage switch equipment fault simulation test device comprises high-voltage switch simulation equipment and a data monitoring device connected with the high-voltage switch simulation equipment; the high-voltage switch simulation equipment comprises a switching-on and switching-off coil, a circuit breaker auxiliary contact and an operating mechanism arranged between the switching-on and switching-off coil and the circuit breaker auxiliary contact; the switching-on and switching-off coil is connected with the data monitoring device through an analog circuit; the data monitoring device is also respectively connected with the circuit breaker auxiliary contact and the operating mechanism. The utility model provides a high tension switchgear trouble analogue test device is used for the various high tension switchgear trouble of analogue test.
Description
Technical Field
The utility model relates to an electrical technology field especially relates to a high tension switchgear trouble analogue test device.
Background
High voltage switchgear refers to indoor and outdoor switchgear operating in power systems with voltages of 3kV and above and frequencies of 50Hz and below, and is commonly used for controlling and protecting power equipment in power systems, such as power plants, substations, transmission and distribution lines.
The circuit breaker is a common high-voltage switch device, has the capacity of bearing normal working current for a long time, bearing short-circuit current for a short time and breaking current, and plays an important role in reliable operation of a power system.
However, in the using process of the circuit breaker, if the opening and closing operation mechanism of the circuit breaker is jammed or deformed, or a secondary control circuit of the circuit breaker fails, the circuit breaker is prone to have a movement-refusing fault, that is, the circuit breaker refuses to be opened or closed. And once the circuit breaker has a failure, the power equipment controlled and protected by the circuit breaker is damaged, and the power system is powered off in a large area, so that the power system cannot operate reliably.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high tension switchgear trouble analogue test device for effectively establish divide closing coil fingerprint storehouse in the high tension switchgear, with the latent trouble of discerning high tension switchgear in advance, improve electric power system's operational reliability.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a high-voltage switch equipment fault simulation test device, which comprises high-voltage switch simulation equipment and a data monitoring device connected with the high-voltage switch simulation equipment; the high-voltage switch simulation equipment comprises a switching-on and switching-off coil, a circuit breaker auxiliary contact and an operating mechanism arranged between the switching-on and switching-off coil and the circuit breaker auxiliary contact; the switching-on and switching-off coil is connected with the data monitoring device through an analog circuit; the data monitoring device is also respectively connected with the circuit breaker auxiliary contact and the operating mechanism.
Compared with the prior art, the utility model provides a high tension switchgear trouble analogue test device has following beneficial effect:
the utility model provides an among the high tension switchgear trouble analogue test device, utilize high tension switchgear analogue device can simulate multiple high tension switchgear trouble one by one, and high tension switchgear analogue device is connected with data monitoring device, utilize data monitoring device can be in the analog process of each high tension switchgear trouble, correspond the current waveform of the divide-shut brake coil among the collection record high tension switchgear analogue device, and gather the operating mechanism's that corresponds with the current waveform actuating signal, at this moment, utilize data monitoring device to the current waveform of divide-shut brake coil, and the operating mechanism's that corresponds with the current waveform action signal carries out analysis processes, can obtain the fingerprint feature that the divide-shut brake coil matches each high tension switchgear trouble, thereby found out divide-shut brake coil fingerprint storehouse.
Therefore, the utility model provides a high tension switchgear trouble analogue test device through many times high tension switchgear trouble analogue test, can effectively establish divide closing coil fingerprint storehouse in the high tension switchgear, helps the structure of accurate judgement high tension switchgear and the running state of divide-shut brake coil, discerns latent fault in advance to for deep state evaluation, the fault diagnosis and the life-span evaluation that carry out high tension switchgear and secondary control circuit establish the basis, with the operational reliability who improves electric power system.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is a schematic structural diagram of a fault simulation test device for high-voltage switchgear according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dc adjustable power supply according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram i of a high-voltage switch simulation device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram ii of a high-voltage switch simulation device according to an embodiment of the present invention;
fig. 5 is a schematic mechanical schematic diagram of an operating mechanism according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a switching-off and switching-on coil provided in the embodiment of the present invention;
fig. 7 is a schematic circuit diagram of an analog circuit according to an embodiment of the present invention;
fig. 8 is a flowchart of a method for using the high voltage switchgear fault simulation test apparatus provided by the embodiment of the present invention.
Reference numerals:
1-high voltage switch simulation equipment, 10-test platform,
11-a support frame, 12-a switching-on and switching-off coil,
121-opening and closing coil body, 122-wire winding,
123-a movable iron core, 124-a push rod,
125-movable iron core reset spring, 126-jamming simulation spacer,
13-the switching-off and switching-on catch, 14-the holding catch,
15-movable contact rod, 16-breaker auxiliary contact,
17-an adjusting hand wheel, 171-a pressure spring,
18-opening and closing brake latch return spring, 19-holding latch return spring,
2-analog circuit, 20-direct current adjustable power supply,
201-ac system, 202-ac transformer,
203-a rectifying circuit, 204-a filter capacitor,
21-a manual switch, 22-an auxiliary relay,
23-time relay, 24-auxiliary switch,
25-adjustable resistance, 3-data monitoring device,
31-data acquisition card, 32-upper computer.
Detailed Description
For the convenience of understanding, the fault simulation test device for high-voltage switchgear according to the embodiments of the present invention will be described in detail below with reference to the drawings.
Referring to fig. 1, a fault simulation test device for a high-voltage switch device provided in an embodiment of the present invention includes a high-voltage switch simulation device 1 and a data monitoring device 3 connected to the high-voltage switch simulation device 1; wherein,
the high-voltage switch simulation equipment 1 comprises a switching-on and switching-off coil 12, a circuit breaker auxiliary contact 16 and an operating mechanism arranged between the switching-on and switching-off coil 12 and the circuit breaker auxiliary contact 16;
the opening and closing coil 12 is connected with the data monitoring device 3 through the analog circuit 2; the data monitoring device 3 is also connected with the circuit breaker auxiliary contacts 16 and the operating mechanism respectively.
The embodiment of the utility model provides an among the high tension switchgear trouble analogue test device, utilize high tension switchgear analogue means 1 can simulate multiple high tension switchgear trouble one by one, and high tension switchgear analogue means 1 is connected with data monitoring device 3, utilize data monitoring device 3 can be in the analog process of each high tension switchgear trouble, correspond the current waveform of the divide-shut brake coil 12 among the collection record high tension switchgear analogue means 1, and gather the operating mechanism's that corresponds with the current waveform action signal, at this moment, utilize data monitoring device 3 to the current waveform of divide-shut brake coil 12, and the operating mechanism's that corresponds with the current waveform action signal carries out analysis processes, can obtain the fingerprint characteristic that divide-shut brake coil 12 matches each high tension switchgear trouble, thereby establish divide-shut brake coil 12 fingerprint storehouse.
Therefore, the embodiment of the utility model provides a high tension switchgear trouble analogue test device, through many times high tension switchgear trouble analogue test, can effectively establish the divide-shut brake coil fingerprint storehouse among the high tension switchgear, help the structure of accurate judgement high tension switchgear and the running state of divide-shut brake coil, discern latent fault in advance to state evaluation, failure diagnosis and the life-span evaluation for going deep into to carry out high tension switchgear and secondary control circuit thereof establishes the basis, with the operational reliability who improves electric power system.
It is understood that the actuator may be a spring actuator, an electromagnetic actuator, a hydraulic actuator, or the like. In order to facilitate multiple times of debugging to obtain effective test results, the operating mechanism in this embodiment selects a spring manual energy storage operating mechanism, please refer to fig. 3, fig. 4, and fig. 6, and the operating mechanism includes: a switching-closing brake latch 13 matched with the switching-closing coil 12, a holding latch 14 buckled with the switching-closing brake latch 13, and an adjusting handwheel 17 connected with the holding latch 14 through a compression spring 171; wherein,
the opening and closing brake catch 13 and the holding catch 14 are respectively hinged with a fixing frame extending out of the test platform 10, the opening and closing brake catch 13 is connected with the test platform 10 through an opening and closing brake catch reset spring 18, and the holding catch 14 is connected with a supporting frame 11 extending out of the test platform 10 through a holding catch reset spring 19; the deformation direction of the opening and closing pawl return spring 18 is vertical to the deformation direction of the holding pawl return spring 19, and the deformation direction of the holding pawl return spring 19 is parallel to the deformation direction of the compression spring 171;
the end of the holding latch 14 close to the auxiliary contacts 16 of the circuit breaker is provided with a moving contact rod 15 for contacting the auxiliary contacts 16 of the circuit breaker.
Referring to fig. 5 and 6, the opening and closing coil 12 includes an opening and closing coil body 121 provided with a conductive wire winding 122, and a movable iron core 123 provided on a side of the opening and closing coil body 121 opposite to the opening and closing pawl 13, and a push rod 124 of the movable iron core 123 penetrates through the opening and closing coil body 121 to contact the opening and closing pawl 13; the movable iron core return spring 125 is sleeved on the rod section of the push rod 124 in the opening and closing coil body 121. In order to facilitate simulation of the switching-on and switching-off coil core jamming fault, a jamming simulation gasket 126 can be arranged on the surface of the switching-on and switching-off coil body 121, which is used for being in contact with the movable core 123.
It should be added that, referring to fig. 1, the analog circuit 2 includes a dc adjustable power supply 20, a positive lead of the dc adjustable power supply 20 is connected to a positive electrode of the opening and closing coil 12, a negative lead of the dc adjustable power supply 20 is connected to a manual switch 21 and an auxiliary relay 22, respectively, and the manual switch 21 and the auxiliary relay 22 are both connected to a negative electrode of the opening and closing coil 12 through a time relay 23. Of course, an auxiliary switch 24 may be provided between the time relay 23 and the switching coil 12 depending on the actual use. The data monitoring device 3 is respectively connected with the positive lead and the negative lead of the direct current adjustable power supply 20 and is used for collecting and recording the current waveform of the opening and closing coil.
In addition, in order to simulate the poor contact fault of the switching-on/off coil, in the above embodiment, the adjustable resistor 25 may be connected in series between the time relay 23 and the negative electrode of the switching-on/off coil 12. By adjusting the resistance value of the adjustable resistor 25, the total resistance value of the loop where the switching-on/off coil 12 is located can be increased, and the current of the loop where the switching-on/off coil 12 is located is reduced, so that the force of the movable iron core 123 in the switching-on/off coil 12 is influenced, and the fault of poor contact of the switching-on/off coil can be simulated.
In order to simulate overvoltage/undervoltage faults of the switching-on/off coil, the embodiment provides the direct-current adjustable power supply which is simple in structure and easy to realize. Referring to fig. 1 and fig. 2, the dc adjustable power supply 20 includes a rectifying circuit 203 connected to an ac system 201 through an ac transformer 202, and a filter capacitor 204 connected in parallel to the rectifying circuit 203; the positive lead and the negative lead of the filter capacitor 204 correspond to the positive lead and the negative lead of the dc adjustable power supply 20, respectively. The positive lead of the filter capacitor 204 is connected with the positive pole of the opening and closing coil 12, and the negative lead of the filter capacitor is respectively connected with the manual switch 21 and the auxiliary relay 22.
Illustratively, the rectifying circuit 203 may be a single-phase bridge rectifying circuit. The voltage adjusting range of the direct current adjustable power supply 20 is 0V-240V, and the output voltage of the direct current adjustable power supply 20 can be changed between 60% and 110% of the rated voltage 220V of the alternating current system 201, namely between 132V and 242V, by adjusting the alternating current transformer 202, so that overvoltage/undervoltage faults of the switching-on/off coil can be simulated.
Please refer to fig. 1, in the fault simulation test device for high-voltage switchgear provided in the above embodiment, the data monitoring device 3 includes a data acquisition card 31 and an upper computer 32 connected to the data acquisition card 31; the data acquisition card 31 is connected to the analog circuit 2, the breaker auxiliary contacts 16 and the operating mechanism, respectively. The data acquisition card 31 is used for acquiring the current waveform of the opening and closing coil 12 in the high-voltage switch analog device, acquiring the action signal of the operating mechanism corresponding to the current waveform, transmitting the acquired current waveform and action signal to the upper computer 32, and recording, analyzing and extracting the current waveform of the opening and closing coil 12 and the action signal of the operating mechanism corresponding to the current waveform through a Laboratory Virtual information Engineering Workbench (Laboratory view) in the upper computer 32, so that the fingerprint characteristics of the opening and closing coil matching the faults of each high-voltage switch device can be obtained, and the opening and closing coil fingerprint library is constructed.
When the high-voltage switchgear fault simulation test device provided by the above embodiment is used, a using method thereof is as shown in fig. 8, and the using method of the high-voltage switchgear fault simulation test device includes:
step S1, simulating multiple faults of the high-voltage switch equipment one by using the high-voltage switch simulation equipment;
step S2, in the simulation process of each high-voltage switch device fault, the data monitoring device is used for correspondingly acquiring and recording the current waveform of the opening and closing coil in the high-voltage switch simulation device and acquiring the action signal of the operating mechanism corresponding to the current waveform;
and step S3, acquiring fingerprint characteristics of the opening and closing coils matched with faults of each high-voltage switch device by using the data monitoring device according to the current waveforms of the opening and closing coils and action signals of the operating mechanism corresponding to the current waveforms, and constructing an opening and closing coil fingerprint library.
It should be noted that the types of the faults of the high-voltage switchgear simulated by the high-voltage switchgear fault simulation test device may be various, and in this implementation, the types of the faults of the high-voltage switchgear include a switching-on/switching-off detent jamming fault, a switching-off/switching-on coil iron core jamming fault, a switching-off/switching-on coil under-voltage fault, a switching-off/switching-on coil contact failure fault, and a switching-off/switching-on coil turn-to-turn short circuit fault.
When the type of the high-voltage switchgear fault is a switching-closing and switching-on/off detent jamming fault, there may be two analog embodiments, please refer to fig. 6, and the first analog embodiment is represented as: the pressure of the pressure spring 171 is adjusted through the adjusting hand wheel 17, and the positive pressure born by the contact surface between the holding pawl 14 and the opening and closing pawl 13 is adjusted, so that the friction force between the holding pawl 14 and the opening and closing pawl 13 is increased, and the condition that the lubrication of the opening and closing pawl 13 is insufficient, namely the blocking fault of the opening and closing pawl is simulated. The second simulation implementation is represented as: and replacing the opening and closing pawl reset spring 18 with different original lengths, different wire diameters and/or different stiffness coefficients, and adjusting the pressure output of the opening and closing pawl reset spring 18 to the opening and closing pawl 13, so that the output of a push rod of a movable iron core in contact with the opening and closing pawl 13 is changed, and the condition of bearing jamming of the opening and closing pawl 13, namely the jamming fault of the opening and closing pawl is simulated.
When the type of the high-voltage switchgear fault is a switching-on/off coil core jamming fault, there may be two simulation embodiments, please refer to fig. 5, the first simulation embodiment is expressed as: the movable iron core return spring 125 with different original lengths, different wire diameters and different stiffness coefficients is replaced in the opening and closing coil to gradually increase the pre-pressure of the movable iron core return spring 125, so that the output resistance of the movable iron core 123 in the opening and closing coil is gradually increased, the stroke characteristic of the movable iron core 123 is changed, and the jamming fault of the iron core of the opening and closing coil is simulated. The second simulation implementation is represented as: a jamming simulation gasket 126 is arranged on the surface, used for contacting with the movable iron core 123, of the opening and closing coil body 121, after the opening and closing coil is triggered, the movable iron core 123 is contacted with the jamming simulation gasket 126 when approaching the stroke end point, and jamming faults of the opening and closing coil iron core can be simulated; in addition, by replacing the jamming simulation gaskets 126 with different thicknesses, the corresponding relation between the shortened length of the output stroke of the movable iron core 123 and the tripping of the on-off brake catch can be effectively researched.
Referring to fig. 1 and fig. 2, since the dc adjustable power supply 20 includes a rectifying circuit 203 connected to the ac system 201 through an ac transformer 202, and a filter capacitor 204 connected in parallel to the rectifying circuit 203; the output voltage of the filter capacitor 204 corresponds to the output voltage of the dc adjustable power supply 20. When the type of the high-voltage switch equipment fault is an overvoltage/undervoltage fault of a switching-on/off coil, the simulation implementation mode is as follows: by adjusting the alternating current transformer 202, the output voltage of the direct current adjustable power supply 20 is changed between 60% and 110% of the rated voltage 220V of the alternating current system 201, namely between 132V and 242V, so that the overvoltage/undervoltage fault of the switching-on/off coil is simulated.
When the type of the high-voltage switchgear fault is a switching-on/off coil contact fault, please refer to fig. 7, the simulation implementation is as follows: an adjustable resistor 25 is connected in series between a time relay 23 and the negative electrode of the opening and closing coil 12 in the analog circuit, the total resistance value of the loop where the opening and closing coil 12 is located is increased and the current of the loop where the opening and closing coil 12 is located is reduced by adjusting the resistance value of the adjustable resistor 25, so that the force of the movable iron core 123 in the opening and closing coil 12 is influenced, and the fault of poor contact of the opening and closing coil is simulated.
When the type of the high-voltage switch equipment fault is a turn-to-turn short circuit fault of the switching-on/off coil, a plurality of switching-on/off coils with the number of turns smaller than the rated number of turns can be matched with the high-voltage switch simulation equipment, then the switching-on/off coils are replaced one by one according to the turn number sequence of the switching-on/off coils from large to small for testing, and different current waveforms of the switching-on/off coils are collected; when the number of turns of the switching-on and switching-off coil is reduced to a certain value, if the movable iron core normally acts, the auxiliary relay cannot rapidly cut off the electrified current of the switching-on and switching-off coil, so that the wire winding of the switching-on and switching-off coil generates heat due to long-time electrification, and turn-to-turn short circuit of the switching-on and switching-off coil is easily caused until the switching-on and switching-off coil is burnt out.
No matter which type of high-voltage switch equipment faults are simulated by the high-voltage switch simulation equipment, the data acquisition card in the data monitoring device can acquire the current waveform of the opening and closing coil in the high-voltage switch simulation equipment and the action signal of the operating mechanism corresponding to the current waveform, and transmits the acquired current waveform and the action signal to the upper computer, so that LabVIEW software in the upper computer is used for recording, analyzing and extracting the current waveform of the opening and closing coil and the action signal of the operating mechanism corresponding to the current waveform, so that fingerprint characteristics of the opening and closing coil matched with the faults of the high-voltage switch equipment are obtained, and a fingerprint library of the opening and closing coil is constructed.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A high-voltage switch equipment fault simulation test device is characterized by comprising high-voltage switch simulation equipment and a data monitoring device connected with the high-voltage switch simulation equipment; wherein,
the high-voltage switch simulation equipment comprises a switching-on and switching-off coil, a circuit breaker auxiliary contact and an operating mechanism arranged between the switching-on and switching-off coil and the circuit breaker auxiliary contact;
the switching-on and switching-off coil is connected with the data monitoring device through an analog circuit; the data monitoring device is also respectively connected with the circuit breaker auxiliary contact and the operating mechanism.
2. The high voltage switchgear fault simulation test device of claim 1,
the operating mechanism comprises: the switching-on and switching-off device comprises a switching-on and switching-off pawl matched with the switching-on and switching-off coil, a retaining pawl buckled with the switching-on and switching-off pawl, and an adjusting hand wheel connected with the retaining pawl through a pressure spring; wherein,
the opening and closing brake pawl and the holding pawl are respectively hinged with a fixing frame extending out of the test platform, the opening and closing brake pawl is connected with the test platform through an opening and closing brake pawl reset spring, and the holding pawl is connected with a supporting frame extending out of the test platform through a holding pawl reset spring;
the end of the retaining latch near the auxiliary contact of the circuit breaker is provided with a movable contact rod for contacting with the auxiliary contact of the circuit breaker.
3. The high-voltage switchgear fault simulation test device according to claim 2, wherein the switching-on and switching-off coil comprises a switching-on and switching-off coil body provided with a wire winding, and a movable iron core arranged on one side of the switching-on and switching-off coil body, which faces away from the switching-on and switching-off pawl, and a push rod of the movable iron core penetrates through the switching-on and switching-off coil body to be in contact with the switching-on and switching-off pawl; the movable iron core reset spring is sleeved on the rod section of the push rod in the opening and closing coil body; and a jamming simulation gasket is arranged on the surface of the opening and closing coil body, which is used for being in contact with the movable iron core.
4. The high-voltage switchgear fault simulation test device according to claim 1, wherein the analog circuit comprises a direct-current adjustable power supply, a positive lead of the direct-current adjustable power supply is connected with a positive electrode of the opening and closing coil, a negative lead of the direct-current adjustable power supply is respectively connected with a manual switch and an auxiliary relay, and the manual switch and the auxiliary relay are both connected with a negative electrode of the opening and closing coil through a time relay;
and the data monitoring device is respectively connected with the anode lead and the cathode lead of the direct-current adjustable power supply.
5. The high-voltage switch equipment fault simulation test device according to claim 4, wherein an adjustable resistor is connected in series between the time relay and the negative electrode of the opening and closing coil.
6. The high-voltage switch equipment fault simulation test device as claimed in claim 4, wherein the direct-current adjustable power supply comprises a rectifying circuit connected with an alternating-current system through an alternating-current transformer, and a filter capacitor connected with the rectifying circuit in parallel; and the positive lead of the filter capacitor is connected with the positive electrode of the opening and closing coil, and the negative lead of the filter capacitor is respectively connected with the manual switch and the auxiliary relay.
7. The high-voltage switch equipment fault simulation test device according to claim 1, wherein the data monitoring device comprises a data acquisition card and an upper computer connected with the data acquisition card; the data acquisition card is respectively connected with the analog circuit, the circuit breaker auxiliary contact and the operating mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721256858.XU CN207215980U (en) | 2017-09-27 | 2017-09-27 | Fault simulation test device for high-voltage switch equipment |
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| CN201721256858.XU CN207215980U (en) | 2017-09-27 | 2017-09-27 | Fault simulation test device for high-voltage switch equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632257A (en) * | 2017-09-27 | 2018-01-26 | 南方电网科学研究院有限责任公司 | High-voltage switchgear fault simulation test device and method |
| CN109658767A (en) * | 2018-12-24 | 2019-04-19 | 国家电网有限公司 | Breaker operation mechanism device for detecting performance |
| CN112816859A (en) * | 2021-01-19 | 2021-05-18 | 国网宁夏电力有限公司培训中心 | On-line monitoring and intelligent evaluation system for on-off coil state of circuit breaker |
-
2017
- 2017-09-27 CN CN201721256858.XU patent/CN207215980U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632257A (en) * | 2017-09-27 | 2018-01-26 | 南方电网科学研究院有限责任公司 | High-voltage switchgear fault simulation test device and method |
| CN107632257B (en) * | 2017-09-27 | 2024-05-14 | 南方电网科学研究院有限责任公司 | High-voltage switching equipment fault simulation test device and method |
| CN109658767A (en) * | 2018-12-24 | 2019-04-19 | 国家电网有限公司 | Breaker operation mechanism device for detecting performance |
| CN112816859A (en) * | 2021-01-19 | 2021-05-18 | 国网宁夏电力有限公司培训中心 | On-line monitoring and intelligent evaluation system for on-off coil state of circuit breaker |
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