CN112595991A - Transformer substation high-voltage arrester leakage current abnormity alarm device - Google Patents
Transformer substation high-voltage arrester leakage current abnormity alarm device Download PDFInfo
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- CN112595991A CN112595991A CN202011448750.7A CN202011448750A CN112595991A CN 112595991 A CN112595991 A CN 112595991A CN 202011448750 A CN202011448750 A CN 202011448750A CN 112595991 A CN112595991 A CN 112595991A
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- 230000008859 change Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The invention discloses a leakage current abnormity warning device of a high-voltage arrester of a transformer substation, which comprises a leakage current meter and a mounting plate, wherein a sliding resistance transformer is fixedly arranged inside the meter plate, a pointer is fixedly arranged inside the meter plate, a sensitive inductor is fixedly arranged inside a device box, a microprocessor is fixedly arranged inside the device box, a display lamp is fixedly arranged on the front surface of the device box, limiting hooks are fixedly arranged on two sides of the outer part of a fixed cylinder, and clamping blocks are fixedly arranged at the top and the bottom of the inner wall of an annular connecting groove. Through reequiping on the structural basis of revealing the ampere meter at current arrester, solved and revealed the ampere meter and patrol the problem that the unusual state is difficult to be discovered among the in-process, make and reveal the unusual condition of leakage current, make things convenient for fortune dimension personnel to control to the substation equipment state, improve the substation and patrol efficiency and quality.
Description
Technical Field
The invention belongs to the technical field of alarm devices, and particularly relates to a leakage current abnormity alarm device for a high-voltage arrester of a transformer substation.
Background
One of the daily important work of the transformer substation is equipment inspection, the leakage current of the lightning arrester in the substation needs to be recorded, whether the leakage current value is normal or not is judged, whether the leakage current value deviation of the lightning arrester between three phases is within a certain range or not is judged, if abnormity occurs, the lightning arrester needs to be stopped in time according to the abnormal severity, and the explosion accident of the lightning arrester is avoided. And along with the continuous increase of unmanned on duty transformer substation, transformer substation fortune dimension people station is than continuously reducing, and less people need manage more equipment, and the arrester is numerous in the station, and the mounted position is different, and the deviation appears easily when personnel patrol and see through glass to revealing the ampere meter pointer observation.
The conventional installation mode of the leakage ammeter is a bolt connection mode, so that the disassembly and the installation are not very convenient, meanwhile, the working environment of part of the lightning arrester leakage ammeter is outdoor, the occurrence of situations such as bolt corrosion and the like is caused due to the action of a long-term natural environment, the rapid operation of the replacement work is particularly hindered, and the safety of workers is checked; but the device is in the in-process of using, the arrester leakage current is unusual not have obvious alarm device, every round through copying all arrester leakage currents and carry out the manual review contrast, the inefficiency, and the mistake that appears is copied and is missed and copy, the trouble hidden danger that easily misses, and fail fine fixed to the position of revealing the ampere meter in the device, so in actual use, because the unstable condition such as can lead to revealing the ampere meter and drop of position, not only influence the use of revealing the ampere meter, still cause the ampere meter of revealing to destroy.
Disclosure of Invention
The invention aims to provide a leakage current abnormity alarm device for a high-voltage arrester of a transformer substation, and the alarm device is used for solving the problems that in the use process of the existing lightning arrester leakage ammeter provided in the background technology, because the existing lightning arrester leakage current abnormity does not have an obvious alarm device, manual examination and comparison are carried out by recording all lightning arrester leakage currents in each inspection, and the position of the leakage ammeter cannot be well fixed, so that the examination and comparison efficiency of workers is low, the fault hidden danger is easily leaked, and the use of the leakage ammeter is influenced.
In order to achieve the purpose, the invention provides the following technical scheme: a leakage current abnormity warning device of a high-voltage arrester of a transformer substation comprises a leakage current meter and a mounting plate, wherein a dial plate is fixedly mounted on the front side of the leakage current meter, a sliding resistance sheet is fixedly mounted inside the dial plate, a pointer is movably mounted inside the dial plate, a first connecting column is fixedly mounted at one end of the bottom of the leakage current meter, a second connecting column is fixedly mounted at one end, far away from the first connecting column, of the bottom of the leakage current meter, a device box is fixedly mounted at the bottom of the leakage current meter, a sensitive inductor is fixedly mounted inside the device box, a microprocessor is fixedly mounted inside the device box, a display lamp is fixedly mounted on the front side of the device box, a connecting cylinder is fixedly mounted on the back side of the leakage current meter, and clamping grooves are formed in the top and the bottom of the connecting cylinder, the utility model discloses a fixing device for a fuel cell, including a connecting cylinder, a fixed cylinder, a locking disc, a connecting cylinder, a fixing groove, a clamping block, a fixing hook, a limiting hook, a locking disc, a limiting groove, a clamping block, a clamping groove, a clamping block and a clamping groove.
Preferably, the inside of dial plate is provided with the graduation apparatus, and graduation apparatus and slip varistor piece all are the arc setting, the slip varistor piece is installed in the graduation apparatus lower part, the pointer is the sliding vane formula.
Preferably, the output end of the sensitive sensor is connected with the input end of the microprocessor through a lead, the output end of the microprocessor is connected with the input end of the display through a lead, the output end of the display is connected with the input end of the display lamp through a lead, and the number of the display lamps is three.
Preferably, the mounting plate is internally provided with a mounting hole, and the bottom of the mounting plate is provided with a mounting groove.
Preferably, the clamping groove is communicated with the annular sliding groove.
Preferably, a central cylinder is fixedly mounted on the back surface of the leakage ammeter, a cavity is formed in the locking disc, and the central cylinder is matched with the specification and the size of the cavity.
Preferably, the fixed cylinder is movably mounted inside the groove, and the limiting hook is movably mounted inside the limiting groove.
Preferably, a knob is fixedly mounted to the outside of the locking disk.
Compared with the prior art, the invention has the beneficial effects that:
1. through the change of revealing the electric current, the pointer removes on the slip varistor piece, the corresponding emergence of the current value of sensitive inductor response changes, through gathering the current value, handle the judgement through microprocessor, make the display lamp light through the display, through reequiping on the current arrester reveals the structure basis of ampere meter, the problem that the unusual state is difficult to the discovery of the ampere meter inspection in-process of revealing has been solved, make the unusual condition of leakage current show and show, make things convenient for the control of fortune dimension personnel to the transformer substation equipment state, improve transformer substation inspection efficiency and quality.
2. Promote to the top of mounting panel through revealing ampere meter and device case, make the joint piece slide in to the outside of annular spout through the joint groove to rotate the locking plate, make joint piece and joint groove not be located same level, the joint can't break away from the outside of connecting cylinder, thereby make the inside that the connecting cylinder can't break away from the locking plate, alright fix with the position to revealing the ampere meter, avoid revealing the ampere meter and drop to ground and cause the damage, be favorable to revealing the use of ampere meter.
3. Through setting up two outside spacing hooks of solid fixed cylinder and two inside spacing grooves of locking disk, when making locking disk anticlockwise rotation, spacing hook gets into the inside of spacing groove gradually, when spacing hook gets into the spacing inslot portion completely, the unable continuation of locking disk removes, be favorable to fixing the position of revealing the ampere meter, make the difficult shift position of revealing the ampere meter, when clockwise rotation locking disk again, spacing hook breaks away from the spacing groove, alright dismantle the ampere meter with revealing, the device is simple, and the operation of being convenient for.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the apparatus case of the present invention;
FIG. 3 is a schematic diagram of a back side three-dimensional structure of the leakage current meter according to the present invention;
FIG. 4 is a front perspective view of the mounting plate of the present invention;
FIG. 5 is an exploded view of the locking disk and stationary barrel of the present invention;
FIG. 6 is a schematic view of the locking disk of the present invention in cross-section from the back.
In the figure: 1. a leakage current meter; 2. a dial plate; 3. sliding the varistor; 4. a pointer; 5. a first connecting column; 6. a second connecting column; 7. a device case; 8. a sensitive sensor; 9. a microprocessor; 10. a display; 11. a display lamp; 12. mounting a plate; 13. mounting holes; 14. mounting grooves; 15. a connecting cylinder; 16. a clamping groove; 17. an annular chute; 18. a central barrel; 19. a fixed cylinder; 20. a limiting hook; 21. a locking disk; 22. a groove; 23. a limiting groove; 24. an annular connecting groove; 25. a clamping block; 26. a cavity; 27. and (6) turning a button.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 6, the present invention provides a technical solution: a leakage current abnormity warning device of a high-voltage arrester of a transformer substation comprises a leakage current meter 1 and a mounting plate 12, wherein a dial plate 2 is fixedly mounted on the front surface of the leakage current meter 1, a sliding resistance-changing sheet 3 is fixedly mounted inside the dial plate 2, a dial gauge is arranged inside the dial plate 2, the dial gauge and the sliding resistance-changing sheet 3 are both arranged in an arc shape, the sliding resistance-changing sheet 3 is mounted on the lower portion of the dial plate 2, a pointer 4 is movably mounted inside the dial plate 2, the pointer 4 is a sliding sheet type, a first connecting column 5 is fixedly mounted at one end of the bottom of the leakage current meter 1, a second connecting column 6 is fixedly mounted at one end of the bottom of the leakage current meter 1, which is far away from the first connecting column 5, a device box 7 is fixedly mounted at the bottom of the leakage current meter 1, a sensitive inductor 8 is fixedly mounted inside the device box 7, a microprocessor 9 is fixedly mounted inside the device, the front of the device box 7 is fixedly provided with a display lamp 11, the output end of the sensitive inductor 8 is connected with the input end of a microprocessor 9 through a lead, the output end of the microprocessor 9 is connected with the input end of a display 10 through a lead, the output end of the display 10 is connected with the input end of the display lamp 11 through a lead, three display lamps 11 are provided, the back of the leakage ammeter 1 is fixedly provided with a connecting cylinder 15, the top and the bottom of the connecting cylinder 15 are both provided with clamping grooves 16, one end of the outside of the connecting cylinder 15, which is close to the leakage ammeter 1, is provided with an annular sliding groove 17, the clamping grooves 16 are communicated with the annular sliding groove 17, the front of the mounting plate 12 is fixedly provided with a fixed cylinder 19, both sides of the outside of the fixed cylinder 19 are both fixedly provided with limit hooks 20, the outside of the fixed cylinder 19 is sleeved with a locking disc 21, the, both sides of the groove 22 are communicated with a limiting groove 23, the limiting hook 20 is movably mounted in the limiting groove 23, an annular connecting groove 24 is formed in the locking disc 21, and a clamping block 25 is fixedly mounted at the top and the bottom of the inner wall of the annular connecting groove 24.
In the embodiment, according to the transformer substation regulation, an initial value is set for a leakage ammeter 1, the reading of the leakage ammeter 1 exceeds the initial value by 1.2 times and is a serious defect, the reading of the leakage ammeter 1 exceeds the initial value by 1.4 times and is an emergency defect, corresponding faults enable three display lamps 11 to be lighted, the colors of the three display lamps 11 are respectively red, yellow and green, the serious defect is bright yellow, the emergency defect is bright red, and the emergency defect is bright green, a sliding varistor sheet 3 is connected with an anode through a first connecting column 5, the lower end of a pointer 4 is connected with a cathode through a second connecting column 6, the pointer 4 moves on the sliding varistor sheet 3 along with the change of leakage current, the current value induced by a sensitive inductor 8 correspondingly changes, the current value is collected and is processed and judged by a microprocessor 9, signals are transmitted to the display lamps 11 through a display 10, so that the corresponding display lamps 11 are lighted, when the leakage ammeter 1 is installed, the clamping block 25 corresponds to the clamping groove 16, then the leakage ammeter 1 is pushed towards the installation plate 12, in the pushing process, the connecting cylinder 15 slides to the inside of the annular connecting groove 24, the clamping block 25 enters the position of the clamping groove 16, when the back surface of the leakage ammeter 1 contacts with the locking disc 21, the clamping block 25 slides to the outside of the annular sliding groove 17 from the clamping groove 16, then the locking disc 21 rotates anticlockwise, in the rotating process, the limiting hook 20 gradually enters the inside of the limiting groove 23, when the locking disc 21 cannot rotate, the limiting hook 20 completely enters the inside of the limiting groove 23, meanwhile, the clamping block 25 slides on the outside of the annular sliding groove 17, the clamping block 25 and the clamping groove 16 are not on the same level, the clamping block 25 cannot be separated from the outside of the connecting cylinder 15, the connecting cylinder 15 cannot be separated from the inside of the locking disc 21, thereby make the rigidity of revealing ampere meter 1, avoid revealing ampere meter 1 and drop to ground and cause the damage, be favorable to revealing ampere meter 1's use, clockwise rotation locking plate 21, until locking plate 21 can't rotate, two spacing hooks 20 at this moment break away from the inside of spacing groove 23, joint piece 25 is located same level with joint groove 16, draw to one side of keeping away from mounting panel 12 and reveal ampere meter 1, connecting cylinder 15 breaks away from the inside of locking plate 21, just accomplished the dismantlement to revealing ampere meter 1, can overhaul or change revealing ampere meter 1, the device is simple, and the operation is convenient.
Example two:
as shown in fig. 1 to 6, on the basis of the first embodiment, the present invention provides a technical solution: the mounting plate 12 is provided with a mounting hole 13 therein, and the mounting plate 12 is provided with a mounting groove 14 at the bottom thereof.
In this embodiment, through setting up mounting hole 13, through the inside bolt that inserts mounting hole 13, mountable board 12 is fixed in the installation stand of arrester, through setting up mounting groove 14, is arranged the bottom of device case 7 in mounting groove 14, lays device case 7 and the ampere meter 1 of revealing, is favorable to installing device case 7 and the ampere meter 1 of revealing.
Example three:
as shown in fig. 1 to 6, on the basis of the first embodiment and the second embodiment, the present invention provides a technical solution: the back of the leakage ammeter 1 is fixedly provided with a central cylinder 18, a cavity 26 is arranged in the locking disc 21, and the central cylinder 18 is matched with the specification and the size of the cavity 26.
In this embodiment, when the leakage current meter 1 is mounted, the central cylinder 18 is placed in the cavity 26, which is beneficial to the connection between the leakage current meter 1 and the locking disk 21, thereby being beneficial to the mounting of the leakage current meter 1.
Example four:
as shown in fig. 1 to 6, on the basis of the first embodiment, the second embodiment and the third embodiment, the present invention provides a technical solution: a knob 27 is fixedly mounted to the outside of the lock disk 21.
In this embodiment, by providing the knob 27, the user can rotate the lock plate 21 by using the knob 27, which is convenient for the user to operate.
The working principle and the using process of the invention are as follows: when in use, according to the regulation of a transformer substation, an initial value is set for the leakage ammeter 1, the mounting plate 12 is fixed in the mounting column of the lightning arrester by inserting bolts into the mounting holes 13, then the leakage ammeter 1 is mounted, the bottom of the device box 7 is positioned in the mounting groove 14 at the bottom of the mounting plate 12, the clamping block 25 corresponds to the clamping groove 16, then the leakage ammeter 1 is pushed towards the mounting plate 12, in the pushing process, the central cylinder 18 slowly slides to the inside of the cavity 26, meanwhile, the connecting cylinder 15 slides to the inside of the annular connecting groove 24, the clamping block 25 enters the position of the clamping groove 16, when the back of the leakage ammeter 1 is in contact with the locking disc 21, the clamping block 25 slides to the outside of the annular sliding groove 17 from the clamping groove 16, then the locking disc 21 is rotated anticlockwise through the knob 27, in the rotating process, the limiting hook 20 gradually enters the limiting groove 23, when the locking disc 21 cannot rotate, the limiting hook 20 completely enters the limiting groove 23, meanwhile, the clamping block 25 slides outside the annular sliding groove 17, the clamping block 25 is not on the same level with the clamping groove 16, the clamping block 25 cannot be separated from the outside of the connecting cylinder 15, the connecting cylinder 15 cannot be separated from the inside of the locking disc 21, so that the position of the leakage current meter 1 is fixed, the sliding rheostat 3 is connected with the positive pole through a guide wire, the lower end of the pointer 4 is connected with the negative pole through a guide wire, the pointer 4 moves on the sliding rheostat 3 along with the change of leakage current, the current value sensed by the sensitive sensor 8 correspondingly changes, the current value is collected and is processed and judged by the microprocessor 9, a signal is transmitted to the display lamp 11 through the display 10, the corresponding display lamp 11 is enabled to light up, the reading of the leakage current meter 1 exceeds the initial value by 1.2 times, for serious defect, the yellow lamp in the display lamp 11 lights, the reading of the leakage ammeter 1 exceeds the initial value by 1.4 times, and for critical defect, the red lamp in the display lamp 11 lights, and when the reading of the leakage ammeter 1 is normal, the green lamp in the display lamp 11 lights, wherein the model of the microprocessor 9 is MSP430, the model of the display 10 is HZ061OLED, when the leakage ammeter 1 is damaged, the rotating knob 27 is utilized to rotate the locking disc 21 clockwise until the locking disc 21 cannot rotate, at this time, the two limit hooks 20 are separated from the inside of the limit groove 23, the clamping block 25 and the clamping groove 16 are positioned on the same level, the leakage ammeter 1 is pulled to one side far away from the mounting plate 12, the connecting cylinder 15 is separated from the inside of the locking disc 21, so that the disassembly of the leakage ammeter 1 is completed, and the leakage ammeter 1 can be overhauled or replaced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an unusual alarm device of transformer substation's high-voltage arrester leakage current, is including revealing ampere meter (1) and mounting panel (12), its characterized in that: the dial plate (2) is fixedly mounted on the front side of the leakage ammeter (1), the sliding rheostat plate (3) is fixedly mounted on the inner portion of the dial plate (2), the pointer (4) is movably mounted on the inner portion of the dial plate (2), the first connecting column (5) is fixedly mounted at one end of the bottom of the leakage ammeter (1), the second connecting column (6) is fixedly mounted at one end of the bottom of the leakage ammeter (1) far away from the first connecting column (5), the device box (7) is fixedly mounted at the bottom of the leakage ammeter (1), the sensitive inductor (8) is fixedly mounted on the inner portion of the device box (7), the microprocessor (9) is fixedly mounted on the inner portion of the device box (7), the display (10) is fixedly mounted on the inner portion of the device box (7), and the display lamp (11) is fixedly mounted on the front side of the device box (7), the back fixed mounting who reveals ampere meter (1) has connecting cylinder (15), joint groove (16) have all been seted up to the top and the bottom of connecting cylinder (15), annular spout (17) have been seted up to the outside one end of being close to revealing ampere meter (1) of connecting cylinder (15), the positive fixed mounting of mounting panel (12) has solid fixed cylinder (19), the equal fixed mounting in both sides of solid fixed cylinder (19) outside has spacing hook (20), locking plate (21) have been cup jointed to the outside of solid fixed cylinder (19), fluted (22) have been seted up at the back of locking plate (21), the both sides of recess (22) all communicate there are spacing groove (23), annular spread groove (24) have been seted up to the inside of locking plate (21), the top and the equal fixed mounting in bottom of annular spread groove (24) inner wall have joint piece (25).
2. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: dial plate (2) inside is provided with the graduation apparatus, and graduation apparatus and slip varistor piece (3) all are the arc setting, slip varistor piece (3) are installed in the graduation apparatus lower part, pointer (4) are the sliding vane formula.
3. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: the output end of the sensitive inductor (8) is connected with the input end of the microprocessor (9) through a lead, the output end of the microprocessor (9) is connected with the input end of the display (10) through a lead, the output end of the display (10) is connected with the input end of the display lamp (11) through a lead, and the number of the display lamps (11) is three.
4. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: mounting hole (13) have been seted up to the inside of mounting panel (12), mounting groove (14) have been seted up to the bottom of mounting panel (12).
5. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: the clamping groove (16) is communicated with the annular sliding groove (17).
6. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: the back of the leakage ammeter (1) is fixedly provided with a central cylinder (18), a cavity (26) is formed in the locking disc (21), and the central cylinder (18) is matched with the specification and size of the cavity (26).
7. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: the fixed cylinder (19) is movably mounted inside the groove (22), and the limiting hook (20) is movably mounted inside the limiting groove (23).
8. The abnormal leakage current alarm device for the high-voltage arrester of the transformer substation of claim 1, characterized in that: and a rotating button (27) is fixedly arranged outside the locking disk (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448750.7A CN112595991A (en) | 2020-12-11 | 2020-12-11 | Transformer substation high-voltage arrester leakage current abnormity alarm device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448750.7A CN112595991A (en) | 2020-12-11 | 2020-12-11 | Transformer substation high-voltage arrester leakage current abnormity alarm device |
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| CN112595991A true CN112595991A (en) | 2021-04-02 |
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|---|---|---|---|
| CN202011448750.7A Pending CN112595991A (en) | 2020-12-11 | 2020-12-11 | Transformer substation high-voltage arrester leakage current abnormity alarm device |
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| CN (1) | CN112595991A (en) |
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| CN101561461A (en) * | 2009-05-22 | 2009-10-21 | 吴江金达精工机械有限公司 | Low-voltage reminding device |
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| CN207318545U (en) * | 2017-11-13 | 2018-05-04 | 国网浙江省电力公司绍兴供电公司 | A kind of arrester Leakage Current table easily changes structure |
| CN209560000U (en) * | 2019-01-25 | 2019-10-29 | 魏欣欣 | A kind of arrester detecting device monitored on-line |
| CN209802431U (en) * | 2019-06-08 | 2019-12-17 | 泰兴市春雷仪表有限公司 | Novel detachable watch |
| CN110988626A (en) * | 2019-12-05 | 2020-04-10 | 广东电网有限责任公司 | Lightning arrester on-line monitoring device |
| CN210469007U (en) * | 2019-11-08 | 2020-05-05 | 江门市永动力电机有限公司 | Motor casing convenient to installation |
| CN211126658U (en) * | 2020-01-11 | 2020-07-28 | 北京市北方森源电气有限责任公司 | Signal indicator lamp used with distribution box |
| CN211505769U (en) * | 2019-12-13 | 2020-09-15 | 上海国铭电气有限公司 | Enameled wire electromagnetic wire voltage tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561461A (en) * | 2009-05-22 | 2009-10-21 | 吴江金达精工机械有限公司 | Low-voltage reminding device |
| CN202255644U (en) * | 2011-09-19 | 2012-05-30 | 马小满 | Water temperature self-reporting system |
| CN205373734U (en) * | 2016-02-24 | 2016-07-06 | 华北电力大学（保定） | Discolour instrument on spot of early warning of power plant |
| CN207096303U (en) * | 2017-06-30 | 2018-03-13 | 义乌市华辉输配电设备有限公司 | It is a kind of can be with the ammeter of guide tracked installation |
| CN207318545U (en) * | 2017-11-13 | 2018-05-04 | 国网浙江省电力公司绍兴供电公司 | A kind of arrester Leakage Current table easily changes structure |
| CN209560000U (en) * | 2019-01-25 | 2019-10-29 | 魏欣欣 | A kind of arrester detecting device monitored on-line |
| CN209802431U (en) * | 2019-06-08 | 2019-12-17 | 泰兴市春雷仪表有限公司 | Novel detachable watch |
| CN210469007U (en) * | 2019-11-08 | 2020-05-05 | 江门市永动力电机有限公司 | Motor casing convenient to installation |
| CN110988626A (en) * | 2019-12-05 | 2020-04-10 | 广东电网有限责任公司 | Lightning arrester on-line monitoring device |
| CN211505769U (en) * | 2019-12-13 | 2020-09-15 | 上海国铭电气有限公司 | Enameled wire electromagnetic wire voltage tester |
| CN211126658U (en) * | 2020-01-11 | 2020-07-28 | 北京市北方森源电气有限责任公司 | Signal indicator lamp used with distribution box |
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Application publication date: 20210402 |
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