CN113960399A - Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method thereof - Google Patents
Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method thereof Download PDFInfo
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- CN113960399A CN113960399A CN202111251271.0A CN202111251271A CN113960399A CN 113960399 A CN113960399 A CN 113960399A CN 202111251271 A CN202111251271 A CN 202111251271A CN 113960399 A CN113960399 A CN 113960399A
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- G—PHYSICS
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- 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
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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
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Abstract
The application relates to the field of production of on-load tap changers of large transformers, in particular to a vacuum arc extinguish chamber test system for the on-load tap changers of the transformers and a method thereof, wherein the system scheme is as follows: inject insulating oil in the proof box, make insulating oil be higher than the length of vacuum interrupter's casing, so that vacuum interrupter is in insulating state, reduce electromagnetic environment to vacuum interrupter's influence, it heats insulating oil to set up the heating member simultaneously at the proof box, power supply is to the operating current of vacuum interrupter power supply in order to simulate vacuum interrupter during operation, simulate the actual dynamic operational environment of vacuum interrupter from this, drive assembly drive transfer line reciprocal rotation from top to bottom, reciprocate in order to drive and move the conducting rod, make vacuum interrupter open and shut, controlling means control heating member heating, make vacuum interrupter be in the actual dynamic operational environment who simulates and open and shut the capability test, satisfy vacuum interrupter operational reliability's demand, improve experimental accuracy.
Description
Technical Field
The application relates to the field of production of on-load tap changers of large transformers, in particular to a vacuum arc extinguish chamber test system for the on-load tap changers of the transformers and a method thereof.
Background
The on-load tap-changer of the large transformer is a special switch for switching the tapping of a primary winding or a secondary winding and adjusting the output voltage of the on-load tap-changer under the condition that the transformer is loaded, and generally comprises a driving mechanism and a selection switch, wherein a vacuum arc extinguish chamber is a key component in the on-load tap-changer and is mainly used for effectively cutting off load current in the gear shifting process of the tap-changer and ensuring the stability of the gear shifting process.
In the related art, as shown in fig. 1, the vacuum interrupter 31 includes a housing 317, a shielding cover 318, a static conductive rod 312, a dynamic conductive rod 311, two moving contacts 313 and a corrugated tube 314, the shielding cover 318 is located in the housing, the static conductive rod 312 and the dynamic conductive rod 311 are both disposed in the shielding cover 318, the static conductive rods 312 are respectively disposed at two ends of the housing 317, the two moving contacts 313 are respectively connected to two ends of the static conductive rod 312 opposite to the dynamic conductive rod 311, and the corrugated tube 314 is sleeved on the dynamic conductive rod 311. The two movable contacts 313 are contacted and separated to complete the opening and closing of the circuit.
Because the vacuum arc-extinguishing chamber plays a key role in the on-load tap-changer and is expensive, the performance of the vacuum arc-extinguishing chamber needs to be tested item by item before the on-load tap-changer leaves a factory, such as vacuum degree test and moving contact abrasion, so as to ensure the quality of the on-load tap-changer. However, an effective test means is lacked for the opening and closing of the vacuum arc-extinguishing chamber, and the requirement for evaluating the operation reliability of the vacuum arc-extinguishing chamber is difficult to meet.
Disclosure of Invention
In order to meet the requirement of evaluating the operation reliability of the vacuum arc extinguish chamber, the application provides a vacuum arc extinguish chamber test system for a transformer on-load tap-changer and a method thereof.
In a first aspect, the application provides a vacuum interrupter test system for a transformer on-load tap-changer, which adopts the following technical scheme:
a vacuum arc-extinguishing chamber test system for a transformer on-load tap-changer comprises a test box, wherein a vacuum arc-extinguishing chamber is detachably connected in the test box, a cover plate is arranged at the top of the test box, a first through hole is formed in the cover plate, a second through hole is formed in the bottom of the test box, a movable conducting rod of the vacuum arc-extinguishing chamber penetrates through the first through hole and extends out of the first through hole, a static conducting rod of the vacuum arc-extinguishing chamber penetrates through the second through hole and extends out of the second through hole, the extending end of the movable conducting rod of the vacuum arc-extinguishing chamber is connected with the extending end of the static conducting rod and an external power supply, insulating oil is filled in the test box, the insulating oil submerges a shell of the vacuum arc-extinguishing chamber, a heating element for heating the insulating oil is arranged in the test box, and a control device and a control power supply for controlling the heating element are arranged on the test box, the control device is connected with the control power supply, a support is arranged at the top of the test box, a transmission rod is connected to the support in a rotating mode, one end of the transmission rod is connected with the movable conducting rod, and a driving assembly used for driving the electric guide rod to move up and down is arranged at one end, far away from the movable conducting rod, of the cover plate.
Through the technical scheme, insulating oil is injected into a test box, the insulating oil is higher than the length of a shell of the vacuum arc extinguish chamber, so that the vacuum arc extinguish chamber is in an insulating state, the influence of an electromagnetic environment on the vacuum arc extinguish chamber is reduced, meanwhile, a heating element is arranged in the test box to heat the insulating oil so as to simulate the thermal working environment of the vacuum arc extinguish chamber, a power supply supplies power to the vacuum arc extinguish chamber so as to simulate the working current of the vacuum arc extinguish chamber during working, thereby simulating the actual dynamic working environment of the vacuum arc extinguish chamber, then a driving component drives a transmission rod to rotate up and down in a reciprocating manner so as to drive a movable conducting rod to move up and down, so that two moving contacts of the vacuum arc extinguish chamber are automatically contacted or separated, the vacuum arc extinguish chamber is opened and closed, a control device heats the heating element, the vacuum arc extinguish chamber is in the simulated actual dynamic working environment to perform opening and closing tests, and the requirements on the running reliability of the vacuum arc extinguish chamber are met, the accuracy of the test is improved, the operation is simple, and the operation of workers is convenient.
Preferably, the driving assembly comprises a cam and a motor, the motor is arranged on the cover plate, the cam is fixedly sleeved on an output shaft of the motor and located above the transmission rod, and the side wall of the cam is abutted to one end, away from the transmission rod, of the movable conducting rod.
Through adopting above-mentioned technical scheme, starter motor makes the cam rotate, because the lateral wall of cam contradicts the transfer line and keeps away from the one end of moving the conducting rod, so can make the transfer line reciprocate from top to bottom to realize that automatic control braking conducting rod reciprocates, thereby be convenient for the staff to carry out machinery to vacuum interrupter and open and shut.
Preferably, the heating member is a heating wire group, the heating wire group is arranged on the inner side wall of the test box and the cover plate, the input end of the heating wire group is connected with the control device, and the output end of the heating wire group is connected with the control power supply.
Through adopting above-mentioned technical scheme, heater strip group sets up in proof box inside wall and apron, can make insulating oil even heating to required temperature to optimize vacuum interrupter's thermal simulation operational environment.
Preferably, the control device comprises a temperature monitoring module, the accumulation module comprises a temperature detection submodule and a temperature control submodule, the temperature detection submodule is arranged on the test box and is used for detecting the temperature of the insulating oil and generating a temperature abnormal signal, the temperature detection submodule is electrically connected with the input end of the temperature control submodule, and the output end of the temperature control submodule is electrically connected with the input end of the heating wire group.
By adopting the technical scheme, the temperature detection submodule can monitor the temperature of the insulating oil in real time, and when the temperature control submodule receives the temperature abnormal signal of the temperature detection submodule, the heating wire is controlled to heat or stop heating so as to ensure that the temperature of the insulating oil is maintained at a certain temperature value, and therefore the insulating oil is kept stable in the thermal simulation working environment.
Preferably, the control device further comprises an alarm module, and the input end of the alarm module is connected with the output end of the temperature control submodule.
By adopting the technical scheme, when the temperature control submodule receives the corresponding temperature abnormal signal, the temperature control submodule controls the alarm module to work and informs workers of the temperature abnormality of the insulating oil in the test box.
Preferably, controlling means is still including the accumulative total module, the count submodule is including handling submodule piece, current detection submodule piece and count submodule piece, handle the submodule piece current detection submodule piece and the count submodule piece is all located on the proof box, current detection submodule piece is used for detecting the electric current when vacuum interrupter opens and shuts and sends current detection signal, it is used for receiving and handling the current detection signal that comes from current detection submodule piece output to handle the submodule piece, the count submodule piece is used for the number of times that accumulative vacuum interrupter opened and shut, current detection submodule piece's signal output part with the input of handling the submodule piece is connected, the count submodule piece and drive assembly all with the output electricity of handling the submodule piece is connected.
Through adopting above-mentioned technical scheme, the working current of current detection submodule piece detection vacuum interrupter, when the current detection submodule piece detects the working current of vacuum interrupter disconnection, then with current detection signal input to handling the submodule piece, it handles the submodule piece through discernment processing and control count submodule piece accumulative total, reach predetermined test number of times when count submodule piece accumulative total, then count submodule piece just sends the count signal to handling the submodule piece, it stops work to handle submodule piece control drive assembly, can carry out automatic accumulation to the number of times that the vacuum interrupter opens and shuts from this, the staff's operation of being convenient for, shorten test time.
Preferably, a sealing convex strip is arranged on the top of the test box in the circumferential direction, and the cover plate is provided with a sealing groove matched with the sealing convex strip in a clamping mode.
Through adopting above-mentioned technical scheme, sealed sand grip and seal groove joint cooperation are in order to strengthen the leakproofness between test box top and the apron, make insulating oil be difficult for oozing from the gap between apron and the test box.
Preferably, the transfer line with be provided with the connecting block between the conducting rod moves, the one end of connecting block is connected with the sliding block, the transfer line is close to the one end sliding groove of the conducting rod that moves of vacuum interrupter, the sliding block with the sliding groove cooperation that slides, the connecting block with vacuum interrupter's the conducting rod that moves is provided with and is used for fixing vacuum interrupter's the fastener of the conducting rod that moves.
Through adopting above-mentioned technical scheme, utilize the fastener to move the conducting rod and fix on the connecting block, so when the transfer line reciprocal swing from top to bottom, the connecting block can drive the sliding block and slide in the groove that slides, because move the conducting rod and reciprocate through first perforation, first perforation is spacing to moving the conducting rod this moment, realizes from this that the transfer line drives and moves the conducting rod and reciprocate to be convenient for carry and pull the conducting rod.
Preferably, the fastener is fastening bolt, be provided with the through-hole on vacuum interrupter's the conducting rod that moves, the connecting block is kept away from the one end of sliding block is provided with the screw hole, fixing bolt runs through the through-hole and with screw hole threaded connection.
Through adopting above-mentioned technical scheme, fixing bolt runs through-hole and screw hole threaded connection, so the staff of being convenient for installs and dismantles vacuum interrupter's the conducting rod that moves and transfer line to subsequent installation and taking out of vacuum interrupter.
In a second aspect, the application provides a method for testing a vacuum arc-extinguishing chamber for a transformer on-load tap-changer, which adopts the following technical scheme:
s1, mounting a vacuum arc-extinguishing chamber sample to be tested in a test box, so that a static conducting rod of the vacuum arc-extinguishing chamber extends out of the test box from the second through hole, and a movable conducting rod of the vacuum arc-extinguishing chamber extends out of a cover plate from the first through hole;
s2, connecting the extending end of the movable conducting rod of the vacuum arc-extinguishing chamber with a transmission rod, starting a motor arranged on a cover plate, and debugging the testing device;
s3, after S2 is finished, injecting insulating oil into the test chamber, and enabling the insulating oil to immerse the shell in the vacuum arc-extinguishing chamber 31;
s4, electrifying the heating wire group, heating the insulating oil by the heating wire group, and connecting the power supply with the vacuum arc-extinguishing chamber to enable the vacuum arc-extinguishing chamber to be in a working state;
s5, setting the target test times, starting a motor arranged on the cover plate, rotating a cam arranged on an output shaft of the motor, driving a conductive rod to move up and down by a transmission rod so as to mechanically open and close the vacuum arc-extinguishing chamber 31, and accumulating the opening and closing times in the vacuum arc-extinguishing chamber;
and S6, when the test times reach the preset times, closing the control power supply, taking out the vacuum arc-extinguishing chamber sample, carrying out performance test according to the relevant standards, and recording the relevant test data.
By adopting the technical scheme, the vacuum arc-extinguishing chamber is positioned in the electrified and constant-temperature heating simulated working environment by heating the insulating oil and electrifying the simulated actual dynamic working environment, the influence of the long-term opening and closing condition of the vacuum arc-extinguishing chamber is simulated, and the accuracy of the test data of the vacuum arc-extinguishing chamber is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. insulating oil is injected into the test box, the dynamic working environment of the vacuum arc extinguish chamber is simulated, the driving assembly drives the transmission rod to rotate up and down in a reciprocating mode, the vacuum arc extinguish chamber is opened and closed, and opening and closing tests of the vacuum arc extinguish chamber are accumulated, so that an effective test device is provided for the opening and closing tests, the test accuracy is improved, the operation is simple, and the operation of workers is convenient;
2. the vacuum arc-extinguishing chamber is in the electrified and constant-temperature heating simulated working environment by utilizing the heating insulating oil and the electrified simulated actual dynamic working environment, the influence of the long-term opening and closing condition of the vacuum arc-extinguishing chamber is simulated, and the accuracy of the test data of the vacuum arc-extinguishing chamber is improved.
Drawings
Fig. 1 is a structural view of a vacuum interrupter in the related art;
fig. 2 is a schematic perspective view of a vacuum interrupter test system 1 for a transformer on-load tap changer according to an embodiment of the present disclosure;
fig. 3 is a cut-away plan view of a test chamber of embodiment 1 of a vacuum interrupter test system for a transformer on-load tap changer according to the present application;
FIG. 4 is an enlarged view of portion A of FIG. 3;
fig. 5 is a schematic view illustrating an assembly relationship between a transmission rod and a movable conducting rod of a vacuum arc-extinguishing chamber testing system for a transformer on-load tap-changer in embodiment 1 of the present application;
FIG. 6 is an enlarged view of portion B of FIG. 5;
fig. 7 is a schematic circuit block diagram of embodiment 1 of a vacuum interrupter testing system for a transformer on-load tap changer according to the present application;
fig. 8 is a cut-away plan view of a test chamber of embodiment 2 of a vacuum interrupter testing system for a transformer on-load tap changer according to the present application;
fig. 9 is a schematic diagram illustrating an assembly relationship of a fixing component of embodiment 2 of a vacuum interrupter testing system for a transformer on-load tap changer according to the present application;
FIG. 10 is an enlarged view of portion C of FIG. 8;
fig. 11 is a block flow diagram of a testing method of a vacuum interrupter for an on-load tap changer of a transformer according to the present application.
Description of reference numerals:
1. a test chamber; 101. an inner box body; 102. an outer case; 2. a cover plate; 3. a first perforation; 4. a second perforation; 5. a seal member; 501. a first seal cartridge; 502. a second seal cartridge; 6. an edge; 7. an elastic clamping strip; 8. a card slot; 9. sealing the convex strips; 10. a sealing groove; 11. fixing the bolt; 12. a support; 13. a rotating shaft; 14. a transmission rod; 15. a sliding block; 16. a sliding groove; 17. connecting blocks; 18. limiting convex strips; 19. fastening a bolt; 20. a through hole; 21. a threaded hole; 22. a drive assembly; 221. a cam; 222. a motor; 23. an oil tank; 24. an oil inlet pipe; 25. an oil outlet pipe; 26. discharging an oil pipe; 27. an oil pump; 28. a valve; 29. heating wires; 30. a control device; 301. a temperature monitoring module; 3011. a temperature detection submodule; 3012. a temperature control submodule; 302. an accumulation module; 3021. a current detection submodule; 3022. a processing module; 3023. a counting submodule; 303. an alarm module; 3031. a counting alarm submodule; 3032. a temperature alarm submodule; 31. a vacuum arc-extinguishing chamber; 311. a movable conductive rod; 312. a static conductive rod; 313. a moving contact; 314. a bellows; 315. a stationary end cover plate; 316. a movable end cover plate; 317. a housing; 318. a shield case; 32. a first clamping block; 33. a second clamping block; 34. inserting a block; 35. a cavity; 36. a connecting plate; 37. a sealing strip; 38. a transparent viewing window; 39. installing a half groove; 40. a slot; 41. positioning blocks; 42. positioning a groove; 43. positioning the bolt; 44. a first mounting hole; 45. a second mounting hole; 46. a first positioning hole; 47. a second positioning hole; 48. and a positioning column.
Detailed Description
The following detailed description of the vacuum interrupter test system and method for the on-load tap-changer of the transformer according to the present application will be made with reference to the accompanying drawings.
The application discloses vacuum interrupter test system for transformer on-load tap-changer.
Example 1:
referring to fig. 2 and 3, the vacuum interrupter test system for the transformer on-load tap-changer comprises a test box 1, wherein a vacuum interrupter 31 is detachably connected in the test box 1. Meanwhile, the top of the test box 1 is covered with a cover plate 2. The test chamber 1 includes an inner chamber 101 and an outer chamber 102, the inner chamber 101 is disposed in the outer chamber 102, and a top of the inner chamber 101 and a top of the outer chamber 102 are connected by a connecting plate 36 so that a cavity 35 is formed between the inner chamber 101 and the outer chamber 102.
Meanwhile, a first through hole 3 is formed in the surface of the cover plate 2 in the thickness direction in a penetrating manner, a second through hole 4 is formed in the center of the bottom of the inner box 101 in a penetrating manner, and the first through hole 3 and the second through hole 4 are coaxially arranged. The bottom in the outer box 102 is communicated with a connecting pipe, one end of the connecting pipe, which is far away from the outer box 102, is fixedly connected with the inner box 101, and the connecting pipe is coaxially arranged with the second through hole 4 and is communicated with the second through hole 4. The movable conductive rod 311 of the vacuum interrupter 31 penetrates the first through hole 3 and extends out of the first through hole 3, and the stationary conductive rod 312 of the vacuum interrupter 31 penetrates the second through hole 4 and extends out of the second through hole 4. The movable contact rod 311 of the vacuum interrupter 31 is electrically connected to a positive electrode of an external power supply, and the stationary contact rod 312 is electrically connected to a negative electrode of the power supply, so that the vacuum interrupter 31 is in an energized operating state.
The four end corners of the cover plate 2 are provided with fixing bolts 11, and each fixing bolt 11 penetrates through the cover plate 2 and is in threaded connection with the connecting plate 36, so that the cover plate 2 is fixed to the top of the test box 1. Outer box 102 top circumference bonds and has sealed sand grip 9, and sealed sand grip 9 sets up along opening circumference, and box 101's a surface circumference is seted up and is sealed sand grip 9 joint complex seal groove 10 in the apron 2 conflict, so can improve the leakproofness between proof box 1 and the apron 2.
Referring to fig. 3 and 4, the first through hole 3 and the second through hole 4 are both provided with a sealing element 5, the sealing element 5 includes a first sealing sleeve 501 and a second sealing sleeve 502, the first sealing sleeve 501 and the second sealing sleeve 502 are both made of rubber materials, the first sealing sleeve 501 is clamped in the first through hole 3 or the second through hole 4, the second sealing sleeve 502 is connected to one end of the first sealing sleeve 501, the second sealing sleeve 502 and the first sealing sleeve 501 are coaxially arranged and communicated, one surface of one second sealing sleeve 502 connected with the first sealing sleeve 501 is abutted against the cover plate 2, and one surface of the other second sealing sleeve 502 connected with the first sealing sleeve 501 is abutted against the inner bottom of the inner box 101.
At this time, the movable conducting rod 311 of the vacuum interrupter 31 passes through the first sealing sleeve 501 located in the first through hole 3 and extends out of the cover plate 2, and the stationary conducting rod 312 passes through the first sealing sleeve 501 located in the second through hole 4 and the connecting pipe and extends out of the test chamber 1. The side wall of the movable conducting rod 311 and the side wall of the static conducting rod 312 of the vacuum arc-extinguishing chamber 31 both abut against the corresponding inner side wall of the first sealing sleeve 501, and one surface of the second sealing sleeve 502 far away from the first sealing sleeve 501 contacts with the static end cover plate 315 and the movable end cover plate 316, so as to enhance the sealing property between the first through hole 3 and the second through hole 4, make the first through hole 3 or the second through hole 4 not easy to leak oil, and play an insulating role for the movable conducting rod 311 and the static conducting rod 312.
It is worth mentioning that a sealing strip 37 is circumferentially connected to an edge of each second sealing sleeve 502, and a surface of the sealing strip 37 close to the vacuum interrupter 31 abuts against a surface of the housing 317 of the vacuum interrupter 31. Second seal cover 502 contacts in apron 2 or proof box 1 a surface of bottom all is provided with three elasticity card strips 7, and three elasticity card strips 7 set up along second seal cover 502 circumference, and corresponding, apron 2 and interior box 101 two relative surfaces of bottom all seted up three and elasticity card strip 7 joint complex draw-in groove 8, so can further strengthen the leakproofness of second seal cover 502 and apron 2 or the bottom of interior box 101.
Referring to fig. 2 and 3, a bracket 12 is disposed on the cover plate 2, in this embodiment, the bracket 12 is vertically disposed and fixedly mounted on a surface of the cover plate 2 facing away from the test chamber 1, and the bracket 12 is located on a side of the first through hole 3. Meanwhile, one end of the bracket 12, which is far away from the cover plate 2, is rotatably connected with a transmission rod 14, and the transmission rod 14 is made of an insulating material. Specifically, a rotating shaft 13 is horizontally arranged between the transmission rod 14 and the bracket 12, one end of the rotating shaft 13 far away from the bracket 12 is fixedly connected with the midpoint of the length direction of the transmission rod 14, and the other end of the rotating shaft 13 is rotatably connected with one end of the bracket 12 far away from the cover plate 2.
Referring to fig. 5 and 6, one end of the driving rod 14 near the first through hole 3 is connected to the movable conductive rod 311 of the vacuum interrupter 31. Specifically, a connecting block 17 is arranged between the transmission rod 14 and the extending end of the movable conductive rod 311 of the vacuum arc-extinguishing chamber 31, and a fastener for fixing the movable conductive rod 311 is arranged between the connecting block 17 and the extending end of the movable conductive rod 311. The surface of one side of the connecting block 17 far from the fastener is integrally formed with a sliding block 15, meanwhile, the surface of one side of the transmission rod 14 near the connecting block 17 is provided with a sliding groove 16, the sliding groove 16 is arranged along the length direction of the transmission rod 14, and the sliding block 15 is inserted into the sliding groove 16 and is in sliding fit with the sliding groove 16, so that the transmission rod 14 drives the movable conductive rod 311. In order to make the sliding block 15 not easy to separate from the sliding groove 16, two limit convex strips 18 for limiting the position of the sliding block 15 are arranged on two opposite groove walls of the sliding groove 16, the two limit convex strips 18 are respectively bonded on one end of the sliding groove 16 close to the groove opening and are arranged along the length direction of the sliding groove 16, and at the moment, two surfaces of the sliding block 15 in the thickness direction respectively abut against the surfaces of the limit convex strips 18 opposite to the groove bottom of the sliding groove 16.
The fastening bolt 19 is used as the fastening bolt 19, the extending end of the movable conducting rod 311 of the vacuum arc-extinguishing chamber 31 is provided with a through hole 20, one surface of the connecting block 17 far away from the sliding block 15 is provided with a threaded hole 21, and the fastening bolt 19 penetrates through the through hole 20 and is in threaded connection with the threaded hole 21, so that the movable conducting rod 311 of the vacuum arc-extinguishing chamber 31 and the transmission rod 14 are connected together. When the movable conducting rod 311 of the vacuum arc-extinguishing chamber 31 needs to be separated from the transmission rod 14, only the fastening bolt 19 needs to be separated from the threaded hole 21, and the operation is simple.
Referring to fig. 5, it should be noted that a driving assembly 22 for driving the transmission rod 14 to swing up and down reciprocally is further disposed on the cover plate 2, in this embodiment, the driving assembly 22 includes a cam 221 and a motor 222, and the motor 222 is fixedly mounted on a surface of the cover plate 2 facing away from the test chamber 1 and is located at an end of the transmission rod 14 away from the movable conductive rod 311. The cam 221 is fixedly sleeved on the output shaft of the motor 222, the cam 221 is located above the transmission rod 14, and the side wall of the cam 221 abuts against one end of the transmission rod 14, which is far away from the movable conductive rod 311 of the vacuum interrupter 31.
Referring to fig. 3 and 6, the motor 222 is started to rotate the cam 221, at this time, the transmission rod 14 swings up and down in a reciprocating manner around the rotating shaft 13, the sliding block 15 slides in a reciprocating manner in the sliding groove 16, and the first through hole 3 defines the movement direction of the movable conductive rod 311, so that the movable conductive rod 311 moves up and down linearly, and therefore the connecting block 17 drives the movable conductive rod 311 to move up and down in the first through hole 3, so that the movable conductive rod 311 of the vacuum arc-extinguishing chamber 31 can be automatically moved up and down, and the vacuum arc-extinguishing chamber 31 is mechanically opened and closed to simulate the opening and closing of the vacuum arc-extinguishing chamber.
Specifically, when the transmission rod 14 is pressed by the cam 221 to swing downward, one end of the transmission rod 14 connected to the movable conducting rod 311 of the vacuum interrupter 31 swings upward, so that the movable conducting rod 311 of the vacuum interrupter 31 is pulled upward, and at this time, the two movable contacts 313 in the vacuum interrupter 31 are separated, so that the vacuum interrupter 31 is in an open state.
When the transmission rod 14 is pressed by the cam 221 to swing upwards, the end of the transmission rod 14 connected to the movable conducting rod 311 of the vacuum interrupter 31 swings downwards, and at this time, the transmission rod 14 drives the movable conducting rod 311 to move downwards, so that the movable contacts 313 connected to the movable conducting rod 311 move downwards until the two movable contacts 313 contact each other, and at this time, the vacuum interrupter 31 is powered on, thereby being in a working state.
Referring to fig. 2 and 3, the system further comprises an oil tank 23 for storing insulating oil, a transparent observation window 38 is formed in a side wall of the oil tank 23, a transparent plate is installed in the transparent observation window 38 to observe the oil level in the oil tank 23, and the top of the oil tank 23 is communicated with a lower oil pipe 26 to facilitate the supplement of the insulating oil. Two inside walls that interior box 101 is relative communicate respectively to have and are used for supplying the oil pipe 24 and go out oil pipe 25 of advancing in box 101 in the insulating oil gets into, advance oil pipe 24 and lie in test box 1 and be close to one side at top of box 101 in being close to, and oil tank 23 is through advancing oil pipe 24 and test box 1 intercommunication, go out oil pipe 25 and lie in the one end that box 101 is close to the interior bottom of box 101 in, advance oil pipe 24 and go out oil pipe 25 and all run through outer box 102 and stretch out outside outer box 102. In addition, an oil pump 27 is installed at the oil inlet pipe 24, and a valve 28 is installed on the oil outlet pipe 25.
When insulating oil needs to be injected into the test box 1, the oil pump 27 mounted on the oil inlet pipe 24 is started, the valve 28 on the oil outlet pipe 25 is closed, and the oil tank 23 injects the insulating oil into the inner box body 101 through the oil inlet pipe 24, so that the insulating oil is immersed in the shell 317 of the vacuum arc-extinguishing chamber 31, that is, the oil pump 27 can be closed, and the influence of the external electromagnetic environment on the vacuum arc-extinguishing chamber 31 is reduced. When the test is finished and the insulating oil needs to be drained, the insulating oil can be drained only by opening the valve 28 arranged on the oil outlet pipe 25.
Referring to fig. 3, in order to monitor the working environment of the vacuum interrupter 31 simulated in the test chamber 1 in real time, the test chamber 1 is further provided with a control device 30 and a control power supply for supplying power to the control device, and the test chamber 1 is provided with a heating element for heating insulation, in this embodiment, the heating element is a heating wire set 29. The heating wire group 29 comprises a plurality of heating wires, and the input end and the output end of the heating wire group are respectively a parallel input end and a parallel output end after the plurality of heating wires are connected in parallel. The heating wires are respectively and fixedly arranged on four outer side walls of the inner box body 101, the box bottom of the inner box body 101 and one surface of the cover plate 2 close to the inner box body 101, so that the insulating oil is uniformly heated.
Meanwhile, referring to fig. 7, the control device 30 includes a temperature monitoring module 301, in this embodiment, the temperature monitoring module 301 includes a temperature detection submodule 3011 and a temperature control submodule 3012, the temperature detection submodule 3011 may be a temperature sensor, and specifically may be an NTC temperature sensor, and the temperature control submodule 3012 is a controller.
The temperature detection sub-module 3011 is mounted on the inner side wall of the outer box 102, and the temperature control sub-module 3012 is mounted on the outer side wall of the outer box 102. The temperature detection submodule 3011 is configured to detect a heating temperature of the insulating oil, and the temperature control submodule 3012 is configured to receive and process a temperature abnormality signal from the temperature sensor, where the temperature abnormality signal includes a temperature rise abnormality signal and a temperature drop abnormality signal. The input end of the temperature control sub-module 3012 is electrically connected to the temperature detection sub-module, the output end of the temperature control sub-module 3012 is electrically connected to the parallel input end of the heating wire group 29, and the parallel output end of the heating wire group 29 is electrically connected to the control power supply.
The temperature control sub-module 3012 monitors the temperature of the insulating oil in real time, when the temperature control sub-module 3012 detects that the temperature of the insulating oil is higher than a preset temperature value, the temperature control sub-module 3012 generates a temperature-rise abnormal signal and sends the temperature-rise abnormal signal to the temperature control sub-module 3012, and when the temperature control sub-module 3012 receives the temperature-rise abnormal signal sent by the temperature control sub-module 3012, the temperature control sub-module 3012 processes the temperature-rise abnormal signal and controls the heating wire set 29 to stop heating.
When the temperature control sub-module 3012 detects that the temperature of the insulating oil in the test chamber 1 is lower than a preset temperature value, the temperature control sub-module 3012 generates a cooling abnormal signal and sends the cooling abnormal signal to the temperature control sub-module 3012, and when the temperature control sub-module 3012 receives the cooling abnormal signal sent by the temperature control sub-module 3012, the temperature control sub-module 3012 processes the cooling abnormal signal and controls the heating wire group 29 to heat. Therefore, the actual thermal working environment of the vacuum arc-extinguishing chamber 31 can be simulated, and the simulated thermal working environment is at a stable temperature value.
Referring to fig. 7, in order to automatically calculate the number of opening and closing tests of the vacuum interrupter 31, the control device 30 further includes an integrating module 302, the integrating module 302 includes a processing submodule 3022, a current detecting submodule 3021 and a counting submodule 3023, and the processing submodule 3022, the current detecting submodule 3021 and the counting submodule 3023 are disposed on an outer side wall of the outer box 102. Specifically, the current detection sub-module 3021 may be an ac current detection module, the processing sub-module 3022 may be a processor, and the counting sub-module 3023 may be a counter. The current detection submodule 3021 is configured to detect a current value when the vacuum interrupter 31 is opened and closed and send a current abnormality signal, the processing submodule 3022 is configured to receive and process the current abnormality signal output from the current detection submodule 3021, and the counting submodule 3023 is configured to accumulate the opening and closing times of the vacuum interrupter 31.
The load input end of the current detection submodule 3021 is electrically connected to the positive electrode of the external power supply, the load output end of the current detection submodule 3021 is electrically connected to the movable conductive rod 311 of the vacuum interrupter 31, the signal output end of the current detection submodule 3021 is electrically connected to the input end of the processing submodule, the output end of the processing submodule 3022 is electrically connected to the input end of the counting submodule 3023, and the output end of the counting submodule 3023 is electrically connected to the control power supply.
The current detection submodule 3021 detects the working current of the vacuum interrupter 31 in real time and sends the working current to the processor, the current detection submodule 3021 detects that the two consecutive working currents are equal to a preset current value, that is, the first current value detects that the vacuum interrupter 31 is at a normal working current value, and the second current detection submodule 3021 detects that the working current in the vacuum interrupter 31 is 0, which indicates that the vacuum interrupter 31 completes one opening and closing.
When the current detection submodule 3021 detects that the two consecutive working currents are equal to the preset current value, a current abnormality signal is generated and sent to the processing submodule 3022, the processing submodule 3022 receives the current abnormality signal sent by the current detection submodule 3021 and processes the current abnormality signal, and the processing submodule 3022 controls the counting submodule 3023 to accumulate the number of times of one test. When the number of tests accumulated by the counting submodule 3023 reaches a preset number value, a counting completion signal is generated and sent to the processing submodule, and the processing submodule receives the counting completion signal sent by the counting submodule 3023, and controls the motor 222 to stop working, thereby completing the test.
If the current detection submodule 3021 detects that any one of two consecutive working currents is not equal to the preset current value, which indicates that the simulated opening and closing of the vacuum interrupter 31 is abnormal, a current abnormal signal is generated and sent to the processing submodule 3022, and the processing submodule 3022 controls the counting submodule to stop counting.
In order to remind the staff of completing the test in time, the control device further comprises an alarm module 303, and the alarm module 303 further comprises a counting alarm submodule 3031 and a temperature alarm submodule 3032. Specifically, count warning submodule 3031 includes first alarm and second alarm, first alarm and second alarm are all installed in the lateral wall of outer box 102, first alarm is audible alarm with the second alarm, the input of first alarm and second alarm all with handle submodule 3022's output electricity and be connected, when count submodule accumulation number of times reaches predetermined number of times, then handle submodule 3022 and will control first alarm to sound to and remind staff's experimental completion in time. When the current detection submodule 3021 detects that any one of two consecutive working currents is not equal to the preset current value, which indicates that the opening and closing of the vacuum arc-extinguishing chamber 31 are abnormal, the control submodule controls the counting submodule 3023 to stop counting, and controls the second alarm to sound.
In addition, the temperature alarm submodule 3032 is a third alarm, the third alarm is installed on the outer side wall of the outer box body 102, the third alarm is an optical alarm, the input end of the third alarm is electrically connected with the output end of the temperature control submodule 3012, when the temperature detection submodule 3011 detects that the temperature of the insulating oil is higher than or lower than a preset temperature value, the temperature control submodule 3012 controls the third alarm to flash, and the worker is reminded that the heating temperature of the heating wire group 29 is abnormal.
The implementation principle of the embodiment 1 of the application is as follows: insulating oil installed in the test box 1 is heated by arranging the heating wire group 29 and the heating power supply in the test box 1, meanwhile, the vacuum arc-extinguishing chamber 31 is electrified, the conduction rod swings up and down in a reciprocating mode through the driving assembly 22, the movable conducting rod 311 moves up and down to open and close the vacuum arc-extinguishing chamber 31 mechanically, the heating wire group 29 is controlled to heat through the control device 30, the accumulation module 302 of the control device 30 counts the opening and closing times of the vacuum arc-extinguishing chamber 31, therefore, the vacuum arc-extinguishing chamber 31 can be placed in an electrified and constant-temperature working environment, the opening and closing condition in the vacuum arc-extinguishing chamber 31 is tested by simulating the actual dynamic working environment of the vacuum arc-extinguishing chamber 31, the test accuracy of the vacuum arc-extinguishing chamber 31 can be improved, the performance data error of the follow-up test vacuum arc-extinguishing chamber 31 is reduced, and the operation is simple.
Example 2:
referring to fig. 8 and 9, different from embodiment 1, the system further includes a fixing component for fixing the vacuum arc extinguishing chamber, the fixing component includes a first clamping block 32 and a second clamping block 33, the first clamping block 32 and the second clamping block 33 are both arc-shaped, mounting half grooves 39 are respectively provided on two opposite sides of the first clamping block 32 and the second clamping block 33, two mounting half grooves 39 form a mounting groove for mounting the vacuum arc extinguishing chamber 31, and the inner side wall of the first clamping block 32 and the inner side wall of the second clamping block 33 are both in contact with the vacuum arc extinguishing chamber 31.
The equal integrated into one piece in both ends of first grip block 32 has inserted block 34, slot 40 has all been seted up at the both ends of second grip block 33, each inserted block 34 is pegged graft with the slot 40 that corresponds and is cooperated, from this preliminarily splice together first grip block 32 and second grip block 33, the both ends of first grip block 32 all are provided with construction bolt, a cell wall that installation half groove 39 was kept away from to each slot 40 all runs through and has seted up first mounting hole 44, the second mounting hole 45 that corresponds with construction bolt is all seted up on a surface of each inserted block 34, each construction bolt runs through first mounting hole 44 and with second mounting hole 45 threaded connection, from this fix first grip block 32 and second grip block 33 together, make first grip block 32 and second grip block 33 press from both sides tight vacuum interrupter 31.
Referring to fig. 9 and 10, two positioning blocks 41 are further fixedly mounted at the bottom of the inner box 101, and the two positioning blocks 41 are respectively disposed at two sides of the second through hole 4. The outer side walls of the first clamping block 32 and the second clamping block 33 are integrally formed with four positioning columns 48 corresponding to the positioning blocks 41, the four positioning columns 48 are sequentially arranged along the arc length direction of the first clamping block 32 or the second clamping block 33, one end, away from the bottom in the test box 1, of each positioning block 41 is provided with a positioning groove 42, the positioning blocks 41 are in plug-in fit with the positioning grooves 42, therefore, the vacuum arc extinguish chamber 31 is preliminarily positioned in the test box 1, and the static conducting rod 312 penetrates through the second through hole 4 and is fixed. All be provided with positioning bolt 43 on each locating piece 41, first locating hole 46 has been seted up to a cell wall in vacuum interrupter 31 is kept away from to positioning groove 42, second locating hole 47 has been seted up on a surface of locating piece 41, and positioning bolt 43 runs through first locating hole 46 and 47 threaded connection of second locating hole, from this with the stable bottom of fixing in proof box 1 of vacuum interrupter 31 to reduce the condition emergence that vacuum interrupter 31 rocked when experimental.
The implementation principle of embodiment 2 of the present application is as follows: the vacuum arc-extinguishing chamber 31 is clamped through the first clamping block 32 and the second clamping block 33, the positioning column 48 is matched with the positioning groove 42 in an inserting mode, the positioning column 48 is fixed with the positioning groove 42 through the positioning bolt 43, and therefore the vacuum arc-extinguishing chamber 31 is stably fixed together, and the vacuum arc-extinguishing chamber 31 is reduced in shaking during testing.
The application discloses a method for testing a vacuum arc extinguish chamber system of an on-load tap-changer for a transformer.
Referring to fig. 11, a vacuum interrupter test method includes the following steps:
s1, installing the sample of the vacuum interrupter 31 to be tested in the test chamber 1, so that the static conductive rod 312 of the vacuum interrupter 31 extends out of the test chamber 1 from the second through hole 4, and the moving conductive rod 311 of the vacuum interrupter 31 extends out of the cover plate 2 from the first through hole 3.
Specifically, before a sample of the vacuum interrupter 31 to be tested is mounted in the test chamber 1, an insulating oil having the same grade as that of an insulating oil used for the transformer is prepared according to the actual use condition of the vacuum interrupter 31.
And S2, connecting the extending end of the movable conducting rod 311 of the vacuum arc-extinguishing chamber 31 with the transmission rod 14, starting the motor 222 arranged on the cover plate 2, and debugging the testing device.
Specifically, the opening and closing speed of the vacuum interrupter 31 is set to 0.7m/s and the frequency is set to 13 times/min, and whether the connection between the transmission rod 14 and the movable conductive rod 311 is stable or not is detected.
And S3, after S2 is finished, injecting insulating oil into the test chamber 1, so that the insulating oil submerges the shell 317 in the vacuum arc-extinguishing chamber 31.
Specifically, in order to rapidly heat the insulating oil to a desired temperature, the insulating oil may be heated to a certain temperature, such as 35 ℃. The person can start the valve 28, so that the insulating oil in the oil tank 23 enters the test box 1 through the oil inlet pipe 24 until the insulating oil in the test box 1 reaches a preset oil level, and then stop injecting the insulating oil into the test box 1.
S4, the heating wire group 29 is electrified, the heating wire group 29 heats the insulating oil, the power supply is connected with the vacuum arc-extinguishing chamber 31, and the vacuum arc-extinguishing chamber 31 is in a working state.
Specifically, the temperature of the insulating oil can be kept at 70 ℃, so that the vacuum interrupter 31 is in a thermal simulation working environment with stable temperature. Meanwhile, a power supply is connected with the vacuum arc-extinguishing chamber 31, working current is applied to the vacuum arc-extinguishing chamber 31, the working current can be 1300A, and the vacuum arc-extinguishing chamber 31 is in an electrified and thermal simulation working environment for experimental opening and closing.
S5, setting the target test times, starting the motor 222 installed on the cover plate 2, rotating the cam 221 installed on the output shaft of the motor 222, so that the transmission rod 14 drives the conductive rod 311 to move up and down to mechanically open and close the vacuum interrupter 31, and accumulating the opening and closing times in the vacuum interrupter 31.
And S6, when the test times reach the preset times, closing the control power supply, taking out the vacuum arc-extinguishing chamber 31 sample, performing performance test according to the relevant standards, and recording relevant test data.
Specifically, the performance of the vacuum interrupter 31 is tested according to relevant standards, such as the abrasion of the movable contact 313 and the vacuum degree, to evaluate the quality of the vacuum interrupter 31, and improve the accuracy of data.
The application discloses an implementation principle of a vacuum arc-extinguishing chamber test method for a transformer on-load tap-changer, which comprises the following steps: the vacuum arc-extinguishing chamber 31 is positioned in the electrified and constant-temperature heating simulated working environment by heating the insulating oil and electrifying to simulate the actual dynamic working environment, the influence of the long-term opening and closing condition of the vacuum arc-extinguishing chamber 31 is simulated, and the accuracy of the test data of the vacuum arc-extinguishing chamber 31 is improved.
The above embodiments are only for illustrating the technical concept and features of the present application, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present application and implement the same, and not to limit the protection scope of the present application. All equivalent changes or modifications made according to the spirit of the present disclosure should be covered by the protection scope of the present disclosure.
Claims (10)
1. The utility model provides a vacuum interrupter test system for transformer on-load tap-changer, includes proof box (1), its characterized in that: the vacuum arc-extinguishing chamber (31) is detachably connected to the inside of the test box (1), the top of the test box (1) is provided with a cover plate (2), the cover plate (2) is provided with a first through hole (3), the bottom of the test box (1) is provided with a second through hole (4), a movable conducting rod (311) of the vacuum arc-extinguishing chamber (31) penetrates through the first through hole (3) and extends out of the first through hole (3), a static conducting rod (312) of the vacuum arc-extinguishing chamber (31) penetrates through the second through hole (4) and extends out of the second through hole (4), the extending end of the movable conducting rod (311) of the vacuum arc-extinguishing chamber (31) is connected with an external power supply source, insulating oil is filled in the test box (1), the insulating oil is immersed in the shell (317) of the vacuum arc-extinguishing chamber (31), and a heating element for heating the insulating oil is arranged in the test box (1), be provided with controlling means (30) and the control power supply that is used for controlling the heating member heating on proof box (1), the control power supply with controlling means (30) are connected, proof box (1) top is provided with support (12), it is connected with transfer line (14) to rotate on support (12), the one end of transfer line (14) with move conducting rod (311) and connect, apron (2) are kept away from the one end that moves conducting rod (311) is provided with and is used for driving drive assembly (22) that the electricity conducting rod reciprocated.
2. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 1, characterized in that: the driving assembly (22) comprises a cam (221) and a motor (222), the motor (222) is arranged on the cover plate (2), the cam (221) is fixedly sleeved on an output shaft of the motor (222) and located above the transmission rod (14), and the side wall of the cam (221) abuts against one end, far away from the movable conducting rod (311), of the transmission rod (14).
3. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 1, characterized in that: the heating member is heater strip group (29), heater strip group (29) set up in the inside wall of proof box (1) and on apron (2), the input of heater strip group (29) with controlling means (30) are connected, the output and the control power supply of heater strip group (29) are connected.
4. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 3, characterized in that: controlling means (30) include temperature monitoring module (301), and temperature monitoring module (301) includes temperature detection submodule piece (3011) and temperature control submodule piece (3012), temperature detection submodule piece (3011) set up in on proof box (1), temperature monitoring module (301) are used for detecting the temperature of insulating oil and produce the temperature abnormal signal, temperature monitoring module (301) with the input electricity of temperature control submodule piece (3012) is connected, the output of temperature control submodule piece (3012) with the input electricity of heater strip group (29) is connected.
5. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 4, characterized in that: the control device (30) further comprises an alarm module (303), and the input end of the alarm module (303) is connected with the output end of the temperature control submodule (3012).
6. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 1, characterized in that: the control device (30) further comprises an accumulation module (302), the accumulation module (302) comprises a processing submodule (3022), a current detection submodule (3021) and a counting submodule (3033), the processing submodule (3022), the current detection submodule (3021) and the counting submodule (3033) are arranged on the test box (1), the current detection submodule (3021) is used for detecting the current when the vacuum arc-extinguishing chamber (31) is opened and sending out a current detection signal, the processing submodule (3022) is used for receiving and processing the current detection signal output by the current detection submodule (3021), the counting submodule (3033) is used for accumulating the opening and closing times of the vacuum arc-extinguishing chamber (31), the signal output end of the current detection submodule (3021) is connected with the input end of the processing submodule (3022), and the counting submodule (3033) and the driving assembly (22) are both connected with the input end of the processing submodule (3022) The output end is electrically connected.
7. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 1, characterized in that: the test box is characterized in that a sealing convex strip (9) is arranged on the top of the test box (1) in the circumferential direction, and the cover plate (2) is provided with a sealing convex strip (9) which is clamped and matched with a sealing groove (10).
8. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 1, characterized in that: transfer line (14) with move and be provided with connecting block (17) between conducting rod (311), the one end of connecting block (17) is connected with sliding block (15), transfer line (14) are close to the one end of moving conducting rod (311) of vacuum interrupter (31) slides groove (16), sliding block (15) with sliding groove (16) cooperation of sliding, connecting block (17) with moving conducting rod (311) of vacuum interrupter (31) is provided with and is used for fixing the fastener of moving conducting rod (311) of vacuum interrupter (31).
9. The vacuum arc-extinguishing chamber testing system for the on-load tap-changer of the transformer according to claim 8, characterized in that: the fastener is fastening bolt (19), be provided with through-hole (20) on moving conducting rod (311) of vacuum interrupter (31), connecting block (17) are kept away from the one end of sliding block (15) is provided with screw hole (21), fastening bolt (19) run through-hole (20) and with screw hole (21) threaded connection.
10. A test method of a vacuum arc-extinguishing chamber for a transformer on-load tap-changer comprises the following specific steps:
s1, a sample of the vacuum arc-extinguishing chamber (31) to be tested is installed in the test box (1), so that the static conducting rod (312) of the vacuum arc-extinguishing chamber (31) extends out of the test box (1) from the second through hole (4), and the movable conducting rod (311) of the vacuum arc-extinguishing chamber (31) extends out of the cover plate (2) from the first through hole (3);
s2, connecting the extending end of the movable conducting rod (311) of the vacuum arc-extinguishing chamber (31) with the transmission rod (14), starting the motor (222) arranged on the cover plate (2), and debugging the testing device;
s3, after S2 is finished, injecting insulating oil into the test box (1) to enable the insulating oil to immerse the shell (317) in the vacuum arc-extinguishing chamber (31);
s4, the heating wire group (29) is electrified, the heating wire group (29) heats the insulating oil, a power supply is connected with the vacuum arc-extinguishing chamber (31), and the vacuum arc-extinguishing chamber (31) is in a working state;
s5, setting the target test times, starting a motor (222) arranged on a cover plate (2), rotating a cam (221) arranged on an output shaft of the motor (222), so that a transmission rod (14) drives a conductive rod (311) to move up and down to mechanically open and close a vacuum arc-extinguishing chamber (31), and accumulating the opening and closing times in the vacuum arc-extinguishing chamber (31);
and S6, when the test times reach the preset times, closing the control power supply, taking out the vacuum arc-extinguishing chamber (31) sample, carrying out performance test according to the relevant standards, and recording the relevant test data.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111251271.0A CN113960399A (en) | 2021-10-27 | 2021-10-27 | Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method thereof |
| PCT/CN2021/131968 WO2023070779A1 (en) | 2021-10-27 | 2021-11-22 | Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111251271.0A CN113960399A (en) | 2021-10-27 | 2021-10-27 | Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method thereof |
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| CN113960399A true CN113960399A (en) | 2022-01-21 |
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| CN202111251271.0A Pending CN113960399A (en) | 2021-10-27 | 2021-10-27 | Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method thereof |
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| WO (1) | WO2023070779A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023070779A1 (en) * | 2021-10-27 | 2023-05-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023070779A1 (en) * | 2021-10-27 | 2023-05-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023070779A1 (en) | 2023-05-04 |
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