CN112327054A - Transformer direct-current resistance tester with high safety - Google Patents
Transformer direct-current resistance tester with high safety Download PDFInfo
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- CN112327054A CN112327054A CN202011080346.9A CN202011080346A CN112327054A CN 112327054 A CN112327054 A CN 112327054A CN 202011080346 A CN202011080346 A CN 202011080346A CN 112327054 A CN112327054 A CN 112327054A
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- 238000001514 detection method Methods 0.000 claims abstract description 71
- 238000012545 processing Methods 0.000 claims abstract description 57
- 238000003860 storage Methods 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 15
- 230000003993 interaction Effects 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 32
- 230000007246 mechanism Effects 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 230000006854 communication Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000007175 bidirectional communication Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 49
- 238000000034 method Methods 0.000 abstract description 25
- 230000008569 process Effects 0.000 abstract description 21
- 238000007599 discharging Methods 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000001939 inductive effect Effects 0.000 description 7
- 238000013339 in-process testing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Abstract
The invention discloses a transformer direct-current resistance tester with high safety, which comprises a processing module, a constant current source module, a wiring port, a voltage and current acquisition module, a man-machine interaction module and a storage module, wherein the output end of the processing module is respectively connected with the constant current source module, the man-machine interaction module and the storage module, the input end of the processing module is respectively connected with the voltage and current acquisition module, the man-machine interaction module and the storage module, the output end of the constant current source module is connected with a winding to be tested, the input end of the voltage and current acquisition module is connected with the wiring port, the wiring port is connected with the winding to be tested through a detection line, the wiring port is connected with the detection line interface, and a power-on detection fixing device. Be equipped with circular telegram in the wiring mouth and detect fixing device, at the in-process of tester circular telegram test, the detection line can't be extracted, and then has guaranteed test process's integrality and has prevented that the inductance from discharging and endangering the safety of tester and tester.
Description
Technical Field
The invention relates to the technical field of testing instruments, in particular to a transformer direct-current resistance tester with high safety.
Background
The direct current resistance of the transformer is a necessary test item for semi-finished products, finished product delivery tests, installation, overhaul, change of tap switches, handover tests and preventive tests of a power department in transformer manufacturing. The transformer direct-current resistance tester can check the welding quality of a winding joint and whether the winding has turn-to-turn short circuit, and can detect whether the contact of each position of the voltage tap switch is good, whether the actual position of the tap switch is consistent with the indicating position, whether the outgoing line is broken, whether stranded wires are wound and have strand breakage and the like. And the direct current resistance tester of the transformer can not directly remove the detection line after the inductive load is measured, so that the safety of testers and the tester is prevented from being endangered by inductive discharge.
However, the existing transformer direct-current resistance tester neglects the importance of the wiring port in design and manufacture, cannot actively fasten the connection between the wiring port and the detection line in the process of power-on detection of the tester, still can carry out the plugging and unplugging of the detection line at will, and further causes the interruption of the test process, and seriously causes the safety of the inductive discharge crisis tester and the tester.
For example, chinese patent document CN201921131157.2 discloses a "multifunctional full-automatic transformer direct current resistance tester", which includes a box body and an upper cover connected to the upper edge of the box body, wherein a transformer direct current resistance tester body is arranged in the box body, a handle is arranged at the upper end of the upper cover, an upper cover lock is further arranged between the box body and the upper cover, the multifunctional full-automatic transformer direct current resistance tester also includes a detachable bottom box arranged at the bottom of the box body, and a fixing component for a to-be-tested piece is arranged in the bottom box; the fixed subassembly of piece that awaits measuring includes elastic contact and movable contact, and the movable contact is connected in the slider, but slider sliding connection in draw runner, and the draw runner is connected in end box bottom, and the draw runner is equipped with the rack, and the slider is equipped with the ratchet that is used for connecting the rack, and movable contact, elastic contact all are equipped with the terminal that is used for the electricity to connect in the transformer direct current resistance tester body. The defects of the patent documents are that an active fastening device of a tester wiring port and a detection line in the testing process is lacked, so that the detection line and the wiring port can be disconnected at will in the testing process, the testing process is interrupted, and the safety of an inductance discharge crisis tester and the tester can be seriously caused.
Disclosure of Invention
The invention mainly solves the technical problem that the detection line of the original transformer direct current resistance tester can be inserted and pulled randomly in the test process, so that the safety of testers and the tester is endangered by the discharge of the inductor; the transformer direct-current resistance tester with high safety is provided, the wiring port is connected with the detection line interface through the electrifying detection fixing device, the detection line cannot be detached in the electrifying test process of the tester, and therefore the integrity of the test process is guaranteed, and the safety of testers and the tester is prevented from being endangered by inductive discharge.
The technical problem of the invention is mainly solved by the following technical scheme: the invention comprises a processing module, a constant current source module, a wiring port, a voltage and current acquisition module, a man-machine interaction module and a storage module, wherein the output end of the processing module is respectively connected with the constant current source module, the man-machine interaction module and the storage module, the input end of the processing module is respectively connected with the voltage and current acquisition module, the man-machine interaction module and the storage module, the output end of the constant current source module is connected with a winding to be detected, the input end of the voltage and current acquisition module is connected with the wiring port, the wiring port is connected with the winding to be detected through a detection line, the wiring port is connected with a detection line interface, and a power-on detection fixing device is.
Be equipped with circular telegram in the wiring mouth and detect fixing device, at the in-process of tester circular telegram test, the detection line can't be extracted, and then has guaranteed test process's integrality and has prevented that the inductance from discharging and endangering the safety of tester and tester.
Preferably, the wiring port comprises an insulating shell and a metal core column inserting sleeve, the metal core column inserting sleeve and the insulating shell are both hollow cylindrical structures with one closed end, a through hole is formed in the middle of the closed end of the insulating shell, and the closed end of the metal core column inserting sleeve is fixedly arranged in the through hole;
the detection line interface comprises a metal core column, a cylindrical insulating shell is sleeved on the metal core column, and a primary locking groove matched with the primary locking mechanism and a secondary locking groove matched with the secondary locking mechanism are formed in the insulating shell;
the electrified detection fixing device comprises a primary locking mechanism and a secondary locking mechanism, the primary locking mechanism is connected with the bottom end of the insulating shell through a spring, the spring and the metal core column are concentrically arranged, and the secondary locking mechanism is arranged on the inner wall of the insulating shell.
Preferably, the primary locking mechanism comprises a primary locking ring, a plurality of arrangement grooves are circumferentially formed in the primary locking ring, the bottoms of the arrangement grooves are connected with the primary lock catch through a first spring, the primary lock catch and the arrangement grooves are arranged in a sliding mode, the first spring is connected with the power module, and a first displacement detection sensor is arranged on the primary lock catch.
Preferably, the secondary locking mechanism comprises a plurality of mounting grooves, a second spring and a secondary lock catch, the mounting grooves are circumferentially arranged on the inner wall of the insulating shell, the bottom of each mounting groove is connected with the secondary lock catch through the second spring, the secondary lock catch and the mounting grooves are arranged in a sliding mode, and the second spring is connected with the power supply module.
When a tester inserts the detection line into the wiring port, the tester only needs to insert the detection line into the position of the first scale mark on the detection line interface, at the moment, the first lock catch and the first lock groove are buckled with each other to complete one-stage locking, when the front end surface of the insulating shell and the first lock catch are in contact with each other and the first lock catch and the first lock groove are buckled with each other, the first lock catch generates displacement, the first displacement detection sensor uploads the displacement information to the processing module, the processing module receives the displacement information, when the time from the last time when the processing module receives the displacement information to the time when the displacement information is not received is T, the processing module controls the power module to electrify the spring, the spring is electrified to contract, and then the detection line interface is driven to be continuously inserted into the wiring port inwards until the second lock catch is buckled with the second lock groove, the metal core column is inserted into the metal core column insertion sleeve, at the moment, the second scale mark on the detection line interface is flush with the wiring port, the test can be started.
After the test is finished, after a test result is obtained, the processing module controls the discharging module to discharge, after the discharging is finished, the processing module controls the power supply module to electrify the second spring, the second spring is electrified and contracted, the second lock catch is disconnected with the second lock groove, the processing module controls the power supply module not to electrify the second spring, the spring is de-electrified and recovers to the original length, the detection line is pushed to move towards the interface, after t time, the processing module controls the power supply module to electrify the first spring, the first spring is electrified and contracted, the first lock catch is disconnected with the first lock groove, the detection line interface is disconnected with the first locking mechanism, the detection line continuously moves outwards and is separated from the wiring port, and a tester does not need to manually pull out the detection line. In the process of the power-on test of the tester, the information of the processing module is not received, and the detection line cannot be pulled out, so that the integrity of the test process is ensured, and the safety of testers and the tester is prevented from being endangered by inductive discharge. At the in-process that inserts the detection line to the wiring mouth, the testing personnel need not accurate with detection line interface and wiring mouth aim at, thereby also can effectively prevent to lead to metal stem and metal stem grafting cover to bump and lead to damaging at the in-process testing personnel of pegging graft with detection line interface and the accurate alignment of wiring mouth.
Preferably, the human-computer interaction module comprises a display module and a key module, wherein the output end of the key module is connected with the input end of the processing module, and the input end of the display module is connected with the output end of the processing module.
The tester can set relevant parameters required by the test through the key module, such as current selection, phase-to-phase tapping, winding temperature, conversion temperature, data query, clock modification, host parameters and the like; the display module is used for displaying the detection information in real time and directly feeding back the detection result to the tester.
Preferably, the tester further comprises a communication module, and the communication module is in bidirectional communication connection with the processing module.
The tester communicates with the upper computer through the communication module.
Preferably, the tester further comprises a print output device, and the print output device is connected with the processing module.
And the printing output device is used for acquiring the test result of the paper plate.
Preferably, the memory module is a nonvolatile memory module.
The data are stored in the nonvolatile storage module, so that the data are effectively prevented from being lost when the tester is powered off.
The invention has the beneficial effects that: in the process of inserting the detection line into the wiring port, a tester does not need to accurately align the detection line interface with the wiring port, so that the damage caused by collision between the metal core column and the metal core column inserting sleeve due to the fact that the tester does not accurately align the detection line interface with the wiring port in the inserting process can be effectively prevented; in the process of the power-on test of the tester, the information of the processing module is not received, and the detection line cannot be pulled out, so that the integrity of the test process is ensured, and the safety of testers and the tester is prevented from being endangered by inductive discharge; after the test is finished, the test personnel do not need to pull out the detection line manually, so that the safety of the tester is improved; the whole testing process is controlled by the processing module, the automation degree is high, and the operation is simple and convenient; the test size is set through the key, the current gears are more, and the measurement range is wide.
Drawings
FIG. 1 is a schematic view of an external configuration of the test meter of the present invention.
FIG. 2 is a block diagram of a test meter according to the present invention.
FIG. 3 is a schematic view of a power-on detection fixture according to the present invention.
In the figure, 1, a shell, 2, a power switch, 3, a grounding column, 4, a display screen, 5, a key, 6, a USB interface, 7, a wiring port, 8, a universal serial interface, 9, a micro printer, 10, a processing module, 11, a constant current source module, 12, a winding to be tested, 13, a storage module, 14, a clock module, 15, a communication module, 16, a discharging module, 17, a power module, 18, a signal acquisition module, 19, an AD conversion module, 20, a display module, 21, a key module, 22, a metal core column, 23, an insulating shell, 24, a primary locking groove, 25, a secondary locking groove, 26, a first scale mark, 27, a second scale mark, 28, an insulating shell, 29, a metal core column inserting sleeve, 30, a mounting seat, 31, a primary locking ring, 32, a spring, 33, a placing groove, 34, a first spring, 35, a primary lock catch, 36 and a first displacement detection sensor are adopted, 37. a mounting groove 38, a second spring 39 and a secondary lock catch.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): the transformer direct current resistance tester with high safety of this embodiment, as shown in fig. 1-2, including casing 1 that has hollow structure, there is the PCB board through the bolt fastening on the inner wall of casing, installs switch 2, ground post 3, display screen 4, button 5, USB interface 6, wiring mouth 7, universal serial interface 8 and micro printer 9 on the front of casing. The keys comprise a reset key, a cycle key, a selection key and a start key; the wiring port comprises a positive and negative output current wiring port and a positive and negative voltage sampling wiring port; the PCB is provided with a processing module 10, a constant current source module 11, a voltage and current acquisition module, a man-machine interaction module, a storage module 13, a clock module 14, a communication module 15, a discharging module 16 and a power module 17.
The voltage and current acquisition module comprises a signal acquisition module 18 and an AD conversion module 19, the input end of the signal acquisition module is connected with the output end of the wiring port, the output end of the signal acquisition module is connected with the input end of the AD conversion module, and the output end of the AD conversion module is connected with the input end of the processing module.
The signal acquisition module is used for acquiring voltage signals and current signals at two ends of the winding 12 to be tested, the voltage signals and the current signals acquired by the signal acquisition module are analog signals, the AD conversion module converts the analog signals into digital signals and sends the digital signals to the processing module, and the processing module calculates and arranges test results and outputs the test results to the man-machine interaction module.
The man-machine interaction module comprises a display module 20 and a key module 21, wherein the input end of the display module is connected with the output end of the processing module, and the output end of the display module is connected with a display screen and used for displaying a test result, a menu such as current selection, phase difference tapping, winding temperature, conversion temperature, data query, clock modification, host machine parameters and the like; the input end of the key module is connected with the keys, and the output end of the key module is connected with the processing module and used for controlling all operations of the tester.
The storage module is connected with the processing module and used for storing the test data. The storage module is a nonvolatile storage module, and data loss in the power failure of the tester can be effectively prevented.
The clock module is connected with the processing module and used for providing time information.
The output end of the processing module is connected with the constant current source module, the output end of the constant current source module is connected with the positive and negative output current wiring ports, and the constant current source module transmits the test current to the winding to be tested through the positive and negative output current wiring ports.
The micro printer is connected with the processing module and used for obtaining the test result of the paper edition.
The communication module is respectively connected with the processing module, the universal serial interface and the USB interface in a bidirectional mode and used for achieving communication between the tester and the upper computer and transmission of test data, and the test data can be stored in a mobile hard disk, such as a U disk, through the USB interface.
The discharging module is connected with the wiring port and the processing module, and after the test is finished, the processing module controls the discharging module to work to discharge the energy of the inductor.
The tester passes through the detection line and links to each other with the winding that awaits measuring, as shown in fig. 3, wherein one end of detection line is equipped with and is used for the detection line interface of being connected with the wiring mouth cooperatees, and the detection line interface includes metal stem 22, and the cover is equipped with the insulating casing 23 that is the cylinder type on the metal stem. The front end processing of insulating casing has one-level locked groove 24, and the insulating casing has second grade locked groove 25 apart from one-level locked groove L processing at an interval, and one-level locked groove and second grade locked groove all have a plurality of, along circumference evenly distributed on the insulating casing. Be equipped with first scale mark 26 and second scale mark 27 on the insulating casing, first scale mark indicates that the tester needs to insert the distance of detection line interface to the wiring mouth, and the second scale mark indicates that the tester can press the start key and test.
The wiring port comprises an insulating shell 28 and a metal core column inserting sleeve 29, the metal core column inserting sleeve is in a hollow cylindrical shape with one closed end, the insulating shell is also in a hollow cylindrical shape with one closed end, a through hole is formed in the middle of the closed end of the insulating shell, the closed end of the metal core column inserting sleeve is fixedly installed in the through hole, the closed end of the metal core column inserting sleeve is connected with a lead, and the insulating shell fixedly connects the wiring port with the shell through a mounting seat 30. And a primary locking mechanism and a secondary locking mechanism are further arranged in the wiring port, the primary locking mechanism is matched and locked with the primary locking groove, and the secondary locking mechanism is matched and locked with the secondary locking groove.
The primary locking mechanism comprises a primary locking ring 31, one end of the primary locking ring is fixedly connected with the closed end of the insulating shell through a spring 32, the spring is sleeved on the outer side of the metal core column inserting sleeve, the center line of the spring and the center line of the metal core column inserting sleeve are in the same straight line, and the spring is connected with the power supply module through a switch S1. The circumference is provided with a plurality of arrangement groove 33 on the one-level catch, the opening of arrangement groove is towards the centre of a ring of catch, the arrangement groove sets up with first catch is corresponding, the bottom of arrangement groove is connected with one-level hasp 35 through first spring 34, one-level hasp and arrangement groove relative slip set up, half of initial position of one-level hasp is located outside the arrangement groove, the inside first spring of each arrangement groove all is connected with power module through switch S2, the terminal surface fixed mounting of one-level hasp and first spring coupling has first displacement detection sensor 36, first displacement detection sensor can send displacement information to processing module, processing module can control the opening and shutting of switch S1 and switch S2, the external diameter of insulating casing is less than the internal diameter of spring.
The secondary locking mechanism comprises a plurality of mounting grooves 37, second springs 38 and secondary lock catches 39, the mounting grooves are machined on the inner wall of the insulating shell and are distributed along the circumferential direction and are arranged corresponding to the secondary lock grooves, the bottoms of the mounting grooves are connected with the secondary lock catches through the second springs, the secondary lock catches are arranged in a sliding mode relative to the mounting grooves, half of the initial positions of the secondary lock catches are located outside the mounting grooves, and the second springs inside the mounting grooves are connected with the power supply module through switches S3.
The working process of the embodiment is as follows: and opening a power switch of the tester to reset the tester. After the tester is reset, all parameters required by the test are set through the keys. After the setting is finished, a tester firstly connects one end of the detection line with a winding to be tested, then the detection line is inserted into the wiring port, the detection line is only inserted into the position of a first scale mark on the detection line interface, at the moment, the first lock catch is buckled with the first lock groove, one-stage locking is finished, when the front end surface of the insulating shell is contacted with the first lock catch in the process that the first lock catch is buckled with the first lock groove, the first lock catch generates displacement, the first displacement detection sensor uploads the displacement information to the processing module, the processing module receives the displacement information, when the time from the last time when the processing module receives the displacement information to the time when the processing module does not receive the displacement information is T, the processing module controls the switch K1 to be closed, the spring is electrified to contract, and then the detection line interface is driven to be continuously connected into the wiring port until the second lock catch is buckled with the second lock groove, at the moment, the metal core column is inserted into the metal core column, at this time, the second scale mark on the detection line interface is flush with the wiring interface, and the test can be started at this time.
After the test is finished, after a test result is obtained, the processing module controls the discharging module to discharge, after the discharging is finished, the processing module control switch S3 is closed, the second spring is electrified and contracted, the second lock catch is disconnected with the second lock groove, the processing module control switch S1 is disconnected, the spring is electrified and is recovered to be original, the detection line is pushed to move towards the interface, after the processing module control switch S1 is disconnected, after t time, the processing module control switch S2 is closed, the first spring is electrified and contracted, the first lock catch is disconnected with the first lock groove, the detection line interface is disconnected with the first locking mechanism, the detection line continues to move outwards and is separated from the connection line interface, and the detection line does not need to be pulled out manually by a tester. In the process of the power-on test of the tester, the information of the processing module is not received, and the detection line cannot be pulled out, so that the integrity of the test process is ensured, and the safety of testers and the tester is prevented from being endangered by inductive discharge.
At the in-process that inserts the detection line to the wiring mouth, the testing personnel need not accurate with detection line interface and wiring mouth aim at, thereby also can effectively prevent to lead to metal stem and metal stem grafting cover to bump and lead to damaging at the in-process testing personnel of pegging graft with detection line interface and the accurate alignment of wiring mouth.
Claims (8)
1. The utility model provides a high transformer direct current resistance tester of security, its characterized in that, includes processing module, constant current source module, wiring mouth, voltage current collection module, man-machine interaction module and storage module, processing module's output is connected with constant current source module, man-machine interaction module and storage module respectively, processing module's input is connected with voltage current collection module, man-machine interaction module and storage module respectively, constant current source module's output is connected with the winding that awaits measuring, voltage current collection module's input is connected with the wiring mouth, the wiring mouth is connected with the winding that awaits measuring through the detection line, the wiring mouth is connected with the detection line interface, be equipped with circular telegram detection fixing device in the wiring mouth.
2. The transformer direct-current resistance tester with high safety according to claim 1, wherein the wiring port comprises an insulating shell and a metal core column insertion sleeve, the metal core column insertion sleeve and the insulating shell are both of hollow cylindrical structures with one closed end, a through hole is formed in the middle of the closed end of the insulating shell, and the closed end of the metal core column insertion sleeve is fixedly arranged in the through hole;
the detection line interface comprises a metal core column, a cylindrical insulating shell is sleeved on the metal core column, and a primary locking groove matched with the primary locking mechanism and a secondary locking groove matched with the secondary locking mechanism are formed in the insulating shell;
the fastening device comprises a primary locking mechanism and a secondary locking mechanism, the primary locking mechanism is connected with the bottom end of the insulating shell through a spring, the spring and the metal core column are arranged concentrically, and the secondary locking mechanism is arranged on the inner wall of the insulating shell.
3. The transformer direct-current resistance tester with high safety according to claim 2, wherein the primary locking mechanism comprises a primary locking ring, a plurality of installation grooves are circumferentially formed in the primary locking ring, the bottoms of the installation grooves are connected with a primary lock catch through a first spring, the primary lock catch and the installation grooves are arranged in a sliding mode, the first spring is connected with the power supply module, and a first displacement detection sensor is arranged on the primary lock catch.
4. The transformer direct-current resistance tester with high safety according to claim 2, wherein the secondary locking mechanism comprises a plurality of mounting grooves, a second spring and a secondary lock catch, the mounting grooves are circumferentially arranged on the inner wall of the insulating shell, the bottom of each mounting groove is connected with the secondary lock catch through the second spring, the secondary lock catch and the mounting grooves are arranged in a sliding mode, and the second spring is connected with the power module.
5. The transformer direct-current resistance tester with high safety according to claim 1, wherein the human-computer interaction module comprises a display module and a key module, an output end of the key module is connected with an input end of the processing module, and an input end of the display module is connected with an output end of the processing module.
6. The transformer direct-current resistance tester with high safety according to claim 1, further comprising a communication module, wherein the communication module is in bidirectional communication connection with the processing module.
7. The transformer direct current resistance tester with high safety according to claim 1, further comprising a printout device, wherein the printout device is connected with the processing module.
8. The transformer direct current resistance tester with high safety according to claim 1, wherein the storage module is a nonvolatile storage module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080346.9A CN112327054A (en) | 2020-10-10 | 2020-10-10 | Transformer direct-current resistance tester with high safety |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080346.9A CN112327054A (en) | 2020-10-10 | 2020-10-10 | Transformer direct-current resistance tester with high safety |
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| CN112327054A true CN112327054A (en) | 2021-02-05 |
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| CN202011080346.9A Pending CN112327054A (en) | 2020-10-10 | 2020-10-10 | Transformer direct-current resistance tester with high safety |
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| CN213633610U (en) * | 2020-10-10 | 2021-07-06 | 杭州松泰电力科技有限公司 | Transformer direct current resistance tester |
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