CN107219489A - Monitor Intelligent current transformer on-line - Google Patents
Monitor Intelligent current transformer on-line Download PDFInfo
- Publication number
- CN107219489A CN107219489A CN201710308549.0A CN201710308549A CN107219489A CN 107219489 A CN107219489 A CN 107219489A CN 201710308549 A CN201710308549 A CN 201710308549A CN 107219489 A CN107219489 A CN 107219489A
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- China
- Prior art keywords
- current transformer
- sensor
- end shield
- casing
- line monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000906 Bronze Inorganic materials 0.000 claims description 25
- 239000010974 bronze Substances 0.000 claims description 25
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 25
- 239000002828 fuel tank Substances 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 28
- 238000013461 design Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- 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
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
Intelligent current transformer, including current transformer body, casing and combination sensor are monitored on-line the invention discloses one kind.Combination sensor is integrated with partial discharge sensor and dielectric loss sensor, can test partial discharge and dielectric loss.Sensor is arranged in casing, casing is located at the lower end of current transformer, i.e. sensor and current transformer integrated design, unified standard interface, live testing is realized, so as to reduce power grid operation management cost.This programme design current transformer includes end shield and time end shield, end shield and time double end shield structures of end shield composition, effectively realize current transformer it is powered and not charged when partial discharge and dielectric loss test, and test process does not influence each other, it ensure that the reliability of current transformer end shield ground connection, it is ensured that equipment safety is reliably run.
Description
Technical field
The present invention relates to electrical equipment technical field, more particularly to a kind of on-line monitoring Intelligent current transformer.
Background technology
The current transformer of operation is tested when not having a power failure to realize test, using electricity of the method as principle with compared with
Appearance type transformer equipment dielectric loss live testing technology and the powered Partial Discharge Detecting Technology of high-frequency method transformer are completing mould
Start after intending experiment and verifying work in power network pilot conversion, obtain certain effect, but fail to be widely applied, its reason is
, it is necessary to access the detection devices such as dielectric loss measuring instrument, partial discharge detection instrument or ultrahigh frequency partial discharge detector during the said equipment live testing,
The installation of above-mentioned detection device needs to have a power failure, and brings inconvenience to installation, and bring certain economic loss.In addition,
Terminal box installation or sensor access are carried out in some equipment can influence equipment dependability, cause potential potential safety hazard, therefore, such as
The problem of what solves to need to have a power failure during detection device access current transformer and integrity problem, as those skilled in the art
Technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, Intelligent current transformer is monitored on-line the invention provides one kind, to solve detection device access electricity
The problem of needing to have a power failure during current transformer and integrity problem.
To achieve the above object, the present invention provides following technical scheme：
One kind on-line monitoring Intelligent current transformer, including：
Current transformer body, the current transformer includes end shield and the secondary end shield being adjacently positioned with the end shield；
It is arranged on the casing of the fuel tank lower end of the current transformer body；
For detecting the shelf depreciation of the current transformer body and the combination sensor of dielectric loss, the combination is passed
Sensor includes partial discharge sensor and dielectric loss sensor, and the combination sensor is arranged in the casing, and the sensor with
Described end shield communication connection.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, in addition to：
The secondary end shield seat of the fuel tank bottom wall is fixed on, the first bronze medal guide rod of described end shield seat is located in the fuel tank
One end is connected with described end shield lead, and the first bronze medal guide rod of described end shield seat, which is located at described in one end outside the fuel tank, to be sensed
Device is communicated to connect.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, with connecting on described end shield seat
The thread bush connect, the thread bush is threadedly coupled with the housing of the sensor；
The second bronze medal guide rod is provided with the sensor, the second bronze medal guide rod bottom is arranged with compression spring, described
The top of two bronze medal guide rods and the end of the first bronze medal guide rod of described end shield seat offset.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, the sensor is provided with signal
Lead-out terminal, for connecting detection instrument to export the signal of the sensor；
It is described provided with the terminal board extended from remote described fuel tank one end of the casing to the fuel tank in the casing
The signal output terminal for exporting the sensor signal is provided with terminal board.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, the current transformer body
Powered oil taking apparatus be arranged in the casing.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, the current transformer body
On be provided with bumper.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, the terminal board by with institute
State the vertically arranged column of terminal board to be connected with the casing, the column is provided with four angles of the terminal board.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, case is offered on the casing
Sealing strip is provided with body door, the cabinet door, the secondary terminal box of the cabinet door and the current transformer is positioned opposite.
In one of the embodiments, in above-mentioned on-line monitoring Intelligent current transformer, two are provided with the casing
The hook for hanging the key for opening the lock is provided with individual lock, the casing.
It can be seen from the above technical proposal that the on-line monitoring Intelligent current transformer that the present invention is provided, including electric current are mutual
Sensor body, casing and combination sensor.Combination sensor is the sensor of partial discharge sensor and dielectric loss sensor integration, can
Test partial discharge can also test dielectric loss.Sensor is arranged in casing, and casing is located at the lower end of current transformer, i.e. sensor and electricity
Current transformer integrated design, eliminates the step of sensor is independently accessed installation, it is not necessary to power failure operation, so as to reduce damage
Lose.In addition, current transformer includes the electric current that end shield and the secondary end shield being adjacently positioned with end shield, i.e. this programme are provided in this programme
Transformer remains the end shield for conventional delivery test, commissioning test and preventive trial of current transformer, increases simultaneously
The secondary end shield being connected with sensor, realizes carry out powered partial discharge and the dielectric loss test of current transformer.This programme design electricity
Current transformer includes end shield and time end shield, end shield and time double end shield structures of end shield composition, effectively realizes current transformer powered
With it is not charged when partial discharge and dielectric loss test, and test process do not influence each other, it is ensured that the reliability of current transformer ground connection,
Ensure that equipment safety is reliably run.
Brief description of the drawings
Fig. 1 is the front view provided in an embodiment of the present invention for monitoring Intelligent current transformer on-line；
Fig. 2 is the left view provided in an embodiment of the present invention for monitoring Intelligent current transformer on-line；
Fig. 3 is the structural representation of provided in an embodiment of the present invention end shield seat.
1st, current transformer body, 2, combination sensor, the 21, second bronze medal guide rod, 3, secondary end shield seat, the 31, first bronze medal guide rod,
4th, thread bush, 5, powered oil taking apparatus, 6, bumper, 7, terminal board.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing and specific embodiment party
Formula, the present invention is described in further detail.It should be appreciated that embodiment described herein is only to solve
The present invention is released, protection scope of the present invention is not limited.
Intelligent current transformer is monitored on-line the invention discloses one kind, to solve during detection device access current transformer
The problem of needing to have a power failure.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1-Fig. 3 is referred to, Fig. 1 is the front view provided in an embodiment of the present invention for monitoring Intelligent current transformer on-line；
Fig. 2 is the left view provided in an embodiment of the present invention for monitoring Intelligent current transformer on-line；Fig. 3 is provided in an embodiment of the present invention
The structural representation of secondary end shield seat..
Intelligent current transformer is monitored on-line the invention discloses one kind, including：Current transformer body 1, casing and biography
Sensor 2.
The insulating barrier of the primary connection of current transformer is rolled by insulating paper from level to level and formed, and is set between every layer of insulating paper
Tinfoil paper layer be referred to as capacitance plate.Capacitance plate in current transformer can effectively improve internal electric field distribution, improve insulating materials profit
With the effect of rate, capacitance plate number is more, and Electric Field Distribution is more uniform in insulation.Wherein, close to first of high-pressure conductive part
Screen is zero screen, and one layer of screen of outermost is then referred to as end shield, and the inside one special layers adjacent with end shield are time end shield, secondary end shield it is special
Property is that it is a capacitance plate, but the influence to the capacitance of capacitance plate not can be ignored.
The current transformer that this programme is provided remains the end shield set on current transformer body 1, while being additionally arranged secondary
End shield, end shield and time double end shield structures of end shield composition.End shield is used for conventional delivery test, commissioning test and preventive trial, with
Conventional dielectric loss and the connection of partial discharge detecting instrument.Secondary end shield is connected with the combination sensor 2 being arranged in casing.
Casing is arranged on the fuel tank lower surface of current transformer body 1, and combination sensor 2, which is arranged in casing, to be used to detect
The shelf depreciation and dielectric loss of current transformer body 1, combination sensor 2 are communicated to connect with time end shield.
Current transformer body 1 and combination sensor 2 are subjected to integrated design in this programme, make combination sensor 2
For a part for current transformer, combination sensor 2 is provided to the powered of the shelf depreciation of current transformer and dielectric loss
The hardware condition of test, so as to play a part of that convenient in charge process shelf depreciation and dielectric loss can be detected, makes electric current
The live testing of transformer is convenient, safe and accurate, without the power supply of drop-out current transformer body 1, so as to also just reduce
The economic loss brought due to having a power failure.
In actual use, secondary end shield is connected with the combination sensor 2 being connected with current transformer body 1, is realized
The test of shelf depreciation and dielectric loss is carried out when current transformer is run to current transformer；End shield and external tester phase
Even, realize current transformer partial discharge and dielectric loss without electrical testing, and the live testing of current transformer and without electrical measurement
Examination does not influence each other.Wherein refer to that the partial discharge of delivery test, commissioning test and preventive trial is tested and Jie without electrical testing
Damage test.
Conceptual design current transformer includes end shield and time end shield, end shield and time double end shield structures of end shield composition, it is ensured that
The reliability of current transformer ground connection, have a power failure test and live testing are independently independent of each other, it is ensured that equipment safety is reliable
Operation.
Combination sensor 2 is partial discharge sensor and dielectric loss sensor integration, and partial discharge sensor includes high frequency partial discharge sensor
With ultrahigh frequency partial discharge sensor.
The on-line monitoring Intelligent current transformer that this programme is provided, in addition to the secondary end shield seat 3 of oil tank bottom plate is fixed on, it is secondary
The side that first bronze medal guide rod 31 of end shield seat 3 is located in fuel tank is connected with time end shield lead, the first bronze medal guide rod 31 of secondary end shield seat 3
Side outside fuel tank is communicated to connect with combination sensor 2, and secondary end shield seat 3 realizes the logical of time end shield and combination sensor 2
Letter connection.
Thread bush 4, thread bush 4 are provided with the connection of secondary end shield seat 3 and combination sensor 2 for convenience, secondary end shield seat 3
It is threadedly coupled with the housing of sensor 2.Can set external screw thread that internal thread can also be set on thread bush 4, it is corresponding the need for
Corresponding internal thread or external screw thread are set on the housing of combination sensor 2.
Combination sensor 2 includes ultrahigh frequency partial discharge sensor, high frequency partial discharge sensor and dielectric loss sensor, ultrahigh frequency partial discharge
Sensor, high frequency partial discharge sensor and dielectric loss sensor are coaxially successively set in the housing of combination sensor 2, the second bronze medal guide rod 21
In the coil for stretching into ultrahigh frequency partial discharge sensor, high frequency partial discharge sensor and dielectric loss sensor 2, the second bronze medal guide rod 21 is by being oriented to
Hole is fixed, and compression spring is set between the second bronze medal guide rod 21 and pilot hole.
Thread bush 4 and time end shield 3 bolt connections of seat.
During the housing of combination sensor 2 is tightened with thread bush 4, the of the end of the second bronze medal guide rod 21 and time end shield
The end of one bronze medal guide rod 31 is offseted, and the second bronze medal guide rod 21 can be extruded, and realizes that the first bronze medal guide rod 31 and the second bronze medal are led
The reliable contacts of bar 21, it is ensured that the effective grounding of secondary end shield.Because the second bronze medal guide rod 21 of sensor 2 passes through impedance and sensor
2 shell is connected, and the shell passes sequentially through time thread bush 4 of end shield seat 3, secondary end shield seat 3 and is connected, so at any time,
Sensor 2 is all in ground state；When carrying out live testing, the connecting detection instrument of combination sensor 2.Because detecting instrument connects
Ground, therefore combination sensor 2 is in ground state all the time, so as to suppress external interference, improves operational reliability.
Combination sensor 2 is provided with signal output terminal, for connecting detection instrument to export the signal of combination sensor 2；
Provided with the terminal board 7 extended from remote fuel tank one end of casing to fuel tank in casing, being provided with terminal board 7 is used for
The signal output terminal of the signal of output transducer 2.The lead-out terminal of combination sensor 2 is with being arranged on signal output on terminal board 7
Terminal is connected, and signal output terminal is connected with external detection instrument.
The powered oil taking apparatus 5 of current transformer of the prior art is arranged on outside the fuel tank of current transformer, except
It is easily impaired outer in installation process, bear to expose to the weather in motion process to drench with rain and also easily corroded and damaged, cause
There is certain potential safety hazard after being used for a long time in powered oil taking apparatus 5.This programme takes oily dress to reduce above-mentioned hidden danger by powered
Put 5 to be arranged in casing, isolated powered oil taking apparatus 5 with external environment by casing, so as to extend powered oil taking apparatus 5
Service life, reduce potential safety hazard.
In view of the safety of operating personnel, this programme increases on current transformer body 1 is provided with bumper 6, insurance
Thick stick 6 is U-shaped bumper 6, it is preferred that bumper 6 is arranged on fuel tank upper end.
Terminal board 7 is rectangle epoxy glass insulation plate, and terminal board 7 is arranged on four supports, on four angles of support
Mounting hole is provided with, for fixing end daughter board 7.Column is with casing by being welded to connect, and the length of column is about 70mm.It is preferred that
, the size of terminal board 7 is 200mm*300mm.
Cabinet door is offered on casing, maintenance of the staff to case in-vivo device, and cabinet door and electric current can be facilitated
The secondary terminal box of transformer is positioned opposite, avoids secondary lead wires pipe, it is to avoid cabinet door breaks secondary lead wires pipe when opening.Casing
Sealing strip is provided with door, being tightly connected for cabinet door and box opening is realized, to the He of combination sensor 2 being arranged in casing
Secondary end shield seat 3 plays a protective role.
Lock is provided with casing, casing is attached with cabinet door by lock, the number of lock is two, Neng Goubao
Demonstrate,prove the firm connection of casing and cabinet door.
Lock is opened by key, in order to avoid key loss, is provided for hanging the hook of key on casing.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. one kind on-line monitoring Intelligent current transformer, it is characterised in that including：
Current transformer body (1), the current transformer includes end shield and the secondary end shield being adjacently positioned with the end shield；
It is arranged on the casing of the fuel tank lower end of the current transformer body (1)；
For detecting the shelf depreciation of the current transformer body (1) and the combination sensor (2) of dielectric loss, the combination
Sensor (2) includes partial discharge sensor and dielectric loss sensor, and the combination sensor (2) is arranged in the casing, and described
Combination sensor (2) is communicated to connect with described end shield.
2. on-line monitoring Intelligent current transformer according to claim 1, it is characterised in that also include：
The secondary end shield seat (3) of the oil tank bottom plate is fixed on, the first bronze medal guide rod (31) of described end shield seat (3) is located at the oil
One end in case is connected with described end shield lead, and the first bronze medal guide rod (31) of described end shield seat (3) is located at outside the fuel tank
One end described in sensor (2) communication connection.
3. on-line monitoring Intelligent current transformer according to claim 1, it is characterised in that with described end shield seat (3)
The thread bush (4) of upper connection, the thread bush (4) is threadedly coupled with the housing of the sensor (2)；
The second bronze medal guide rod (21) is provided with the sensor (2), the second bronze medal guide rod (21) bottom is arranged with compression spring,
The top of the second bronze medal guide rod (21) and the end of the first bronze medal guide rod (31) of described end shield seat (3) offset.
4. on-line monitoring Intelligent current transformer according to claim 1, it is characterised in that the combination sensor (2)
Provided with signal output terminal, for connecting detection instrument to export the signal of the combination sensor (2)；
It is described provided with the terminal board (7) extended from remote described fuel tank one end of the casing to the fuel tank in the casing
The signal output terminal for exporting the sensor (2) signal is provided with terminal board (7).
5. on-line monitoring Intelligent current transformer according to claim 1, it is characterised in that the current transformer body
(1) powered oil taking apparatus (5) is arranged in the casing.
6. on-line monitoring Intelligent current transformer according to claim 1, it is characterised in that the current transformer body
(1) bumper (6) is provided with.
7. on-line monitoring Intelligent current transformer according to claim 4, it is characterised in that the terminal board (7) passes through
It is connected, is respectively provided with four angles of the terminal board (7) with the casing with the terminal board (7) vertically arranged column
State column.
8. on-line monitoring Intelligent current transformer according to claim 1, it is characterised in that offer case on the casing
Sealing strip is provided with body door, the cabinet door, the secondary terminal box of the cabinet door and the current transformer is positioned opposite.
9. the on-line monitoring Intelligent current transformer according to any one of claim 1 to 8, it is characterised in that the casing
On be provided with the hook being provided with two locks, the casing for hanging the key for opening the lock.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795554.4A CN106199482A (en) | 2016-08-31 | 2016-08-31 | A kind of on-line monitoring Intelligent current transformer |
| CN2016107955544 | 2016-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107219489A true CN107219489A (en) | 2017-09-29 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795554.4A Pending CN106199482A (en) | 2016-08-31 | 2016-08-31 | A kind of on-line monitoring Intelligent current transformer |
| CN201710308549.0A Pending CN107219489A (en) | 2016-08-31 | 2017-05-04 | Monitor Intelligent current transformer on-line |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795554.4A Pending CN106199482A (en) | 2016-08-31 | 2016-08-31 | A kind of on-line monitoring Intelligent current transformer |
Country Status (1)
| Country | Link |
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| CN (2) | CN106199482A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273137A (en) * | 2020-02-21 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107399B (en) * | 2018-02-26 | 2024-04-02 | 国网宁夏电力有限公司电力科学研究院 | Electrified access device and transformer verification system |
| CN108710005B (en) * | 2018-06-12 | 2020-11-03 | 广东电网有限责任公司广州供电局 | Dielectric loss partial discharge sensor structure and capacitive high-voltage electrical equipment detection mechanism |
| CN110729119B (en) * | 2019-10-25 | 2020-12-04 | 中互电气(江苏)有限公司 | High-voltage mutual inductor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273137A (en) * | 2020-02-21 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
| CN111273137B (en) * | 2020-02-21 | 2022-08-05 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
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