CN108828305A - A kind of transformer iron core grounding current measuring device - Google Patents
A kind of transformer iron core grounding current measuring device Download PDFInfo
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- CN108828305A CN108828305A CN201810714874.1A CN201810714874A CN108828305A CN 108828305 A CN108828305 A CN 108828305A CN 201810714874 A CN201810714874 A CN 201810714874A CN 108828305 A CN108828305 A CN 108828305A
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- current
- iron core
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- measuring device
- transformer iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000012545 processing Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000011897 real-time detection Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
This application discloses a kind of transformer iron core grounding current measuring devices, including：Current acquisition module keeps connecting and acquiring the current information of the ground line for the ground line with transformer core；Display module is connect with the current acquisition module, for showing the current information.This transformer iron core grounding current measuring device keeps connecting by the ground line of current acquisition module and transformer core, and acquires the current information of ground line in real time, and current information is carried out real-time display finally by display module.Therefore, testing staff is not needed periodically to detect, only needing testing staff to observe the current information shown on display module at any time i.e. can determine whether transformer iron core grounding current is more than specified value, compared with existing detection methods, it being capable of real-time detection earth current, whether discovery earth current is more than specified value in time, and simplifies detection operation.
Description
Technical field
The present invention relates to transformer detection technique field, in particular to a kind of transformer iron core grounding current measuring device.
Background technique
In normal work, it is uneven that electrified coil and conducting wire will lead to inside transformer electric field to transformer, transformer fe
Core and metal parts are also in the electric field.The internal electric field of transformer is in a kind of state heterogeneous, not only the shape of power line
Shape is more special, and the difference in size of each point current potential is also bigger, and iron core and other metal parts are because different positions is different
Current potential, when the potential difference between two o'clock reaches breakdown voltage, it may occur that spark discharge, electric discharge can accelerate transformer oil and solid
The damage of body insulation, if long-term development, it may occur that accident.
In order to avoid there is above situation, iron core and other metal parts must link together and be grounded with fuel tank,
And only one point earth, so that them is in zero potential.Earth current is very small under normal circumstances, probably at tens milliamperes.But
When iron core is there are when more than two o'clock ground connection, will be formed into a loop between iron core and the earth, earth current at this time will
Increase many times larger, causes security risk.Therefore, in current power transformation operation work, staff needs periodically to carry out electrification
Detect work, that is, measure whether iron core grounding current is more than specified value using ammeter.
But periodic measurement transformer iron core grounding current is relatively complicated, and whether can not find earth current in time
More than specified value.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of transformer iron core grounding current measuring devices, to examine in real time
The earth current of transformer core is surveyed, the detection operation of earth current is simplified.
In order to achieve the above objectives, the present invention provides following technical scheme：
A kind of transformer iron core grounding current measuring device, including：
Current acquisition module keeps the electric current for connecting and acquiring the ground line to believe for the ground line with transformer core
Breath；
Display module is connect with the current acquisition module, for showing the current information.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the current acquisition module includes：
Ac leakage flow sensor, for keeping connecting and acquiring the current signal of the ground line with the ground line,
And output voltage signal；
A/D conversion module is connect with the ac leakage flow sensor, for converting digital letter for the voltage signal
Number；
Processing module is all connected with the A/D conversion module and the display module, and the processing module is according to the number
The current information is calculated in word signal, and the current information is transferred to the display module.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the ac leakage flow sensor is to open
Mouth formula ac leakage flow sensor.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the processing module is single-chip microcontroller, PLC
Or computer.
Preferably, in above-mentioned transformer iron core grounding current measuring device, further include and the current acquisition module
The power supply module of connection.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the power supply module is battery or exchange
Power supply.
Preferably, in above-mentioned transformer iron core grounding current measuring device, further include and the current acquisition module
The cue module of connection, for when the current information is more than setting electric current value, the cue module to be prompted.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the setting electric current value be 90mA~
Any value in 110mA.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the cue module includes auditory tone cues
Unit and/or light prompt unit.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the cue module is to mention with sound
Show the alarm lamp of function.
Compared with prior art, the beneficial effects of the invention are as follows：
Transformer iron core grounding current measuring device provided by the invention passes through current acquisition module and transformer core
Ground line keeps connection, and acquires the current information of ground line in real time, carries out current information in real time finally by display module
Display.It therefore, there is no need to testing staff periodically to detect, it is only necessary to which testing staff observes the electricity shown on display module at any time
Stream information can determine whether transformer iron core grounding current is more than specified value, compared with existing detection methods, can be real-time
Earth current is detected, finds whether earth current is more than specified value in time, and simplifies detection operation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of transformer iron core grounding current measuring device provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another transformer iron core grounding current measuring device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another transformer iron core grounding current measuring device provided in an embodiment of the present invention.
Specific embodiment
There is provided a kind of transformer iron core grounding current measuring devices for core of the invention, being capable of real-time detection transformer
The earth current of iron core simplifies the detection operation of earth current.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, hereinafter referred to as being surveyed the embodiment of the invention provides a kind of transformer iron core grounding current measuring device
Measure device comprising current acquisition module 1 and display module 2, wherein current acquisition module 1 is used to connect with transformer core
Ground wire keeps connection, and acquires the current information of ground line, that is, current acquisition module 1 is connected on ground line always；Show mould
Block 2 is connect with current acquisition module 1, the current information acquired for showing current acquisition module 1.
When the measuring device works, the ground line of current acquisition module 1 and transformer core is kept connecting, current acquisition
The current information that acquisition is grounded in real time of module 1, carries out real-time display for current information finally by display module 2.Therefore, no
Testing staff is needed periodically to detect, it is only necessary to which testing staff observes the current information shown on display module 2 at any time
Judge whether transformer iron core grounding current is more than specified value, it compared with existing detection methods, being capable of real-time detection ground connection electricity
Stream finds whether earth current is more than specified value in time, and simplifies detection operation.
As shown in Fig. 2, the embodiment of the invention provides a kind of specific current acquisition module 1, the current acquisition module 1 packet
Include ac leakage flow sensor 11, A/D conversion module 12 and processing module 13, wherein ac leakage flow sensor 11 be used for
Ground line keeps connection, and acquires the current signal of ground line, exports after converting voltage signal for current signal；A/D conversion
Module 12 is connect with ac leakage flow sensor 11, and the voltage signal for exporting ac leakage flow sensor 11 is converted into number
Word signal；Processing module 13 and A/D conversion module 12 and display module 2 are all connected with, and processing module 13 is according to A/D conversion module 12
The digital signal of conversion is calculated the current information of corresponding testing result, and by the current information be transferred to display module 2 into
Row display.
It is capable of the current signal of real-time detection ground line using ac leakage flow sensor 11.
Further, in the present embodiment, ac leakage flow sensor 11 uses open type ac leakage flow sensor.It opens
Mouthful formula ac leakage flow sensor can be open, and directly vise the connection that ground line can be realized and is grounded, do not need by
Ground line packs into open type ac leakage sensor, facilitates detection.Certainly, ac leakage flow sensor 11 can also use
Closed type ac leakage flow sensor only needs to pack into ground line in closed type ac leakage flow sensor, and operation is not so good as
The convenience of open type.
In the present embodiment, processing module 13 is single-chip microcontroller, PLC or computer, as long as can be realized input, output and meter
Calculate function.
As shown in Fig. 2, the measuring device in the present embodiment further includes the power supply module 3 connecting with current acquisition module 1, tool
Body, power supply module 3 is with ac leakage flow sensor 11 and processing module 13 for being electrically connected.
As optimization, in the present embodiment, it is current acquisition mould by battery that power supply module 13, which is battery or AC power source,
Block 1 is powered, or directly passing through AC power source is the power supply of current acquisition module 1.
As shown in figure 3, in the present embodiment, measuring device further includes the cue module 4 connecting with current acquisition module 1,
When current information is more than setting electric current value, cue module 4 is prompted, to prompt testing staff to find the problem in time and carry out
Follow-up work.
As optimization, in the present embodiment, setting electric current value is any value in 90mA~110mA, usually will setting electricity
Flow valuve is set as 100mA.
As optimization, cue module 4 includes auditory tone cues unit and/or light prompt unit, that is, cue module 4 can be with
Include individually auditory tone cues unit, is only prompted by sound, can also include individually light prompt unit, only pass through light
It is prompted, or simultaneously includes auditory tone cues unit and light prompt unit, prompted simultaneously by sound and light.
Specifically, cue module 4 is the alarm lamp with voice prompt function, while carrying out audible alarm, alarm
Lamp carries out flashing or luminous prompting.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of transformer iron core grounding current measuring device, which is characterized in that including：
Current acquisition module keeps connecting and acquiring the current information of the ground line for the ground line with transformer core；
Display module is connect with the current acquisition module, for showing the current information.
2. transformer iron core grounding current measuring device according to claim 1, which is characterized in that the current acquisition mould
Block includes：
Ac leakage flow sensor, for keeping connecting and acquiring the current signal of the ground line with the ground line, and it is defeated
Voltage signal out；
A/D conversion module is connect with the ac leakage flow sensor, for converting digital signal for the voltage signal；
Processing module is all connected with the A/D conversion module and the display module, and the processing module is believed according to the number
Number the current information is calculated, and the current information is transferred to the display module.
3. transformer iron core grounding current measuring device according to claim 2, which is characterized in that the ac leakage stream
Sensor is open type ac leakage flow sensor.
4. transformer iron core grounding current measuring device according to claim 2, which is characterized in that the processing module is
Single-chip microcontroller, PLC or computer.
5. transformer iron core grounding current measuring device according to claim 1-4, which is characterized in that further include
The power supply module being connect with the current acquisition module.
6. transformer iron core grounding current measuring device according to claim 5, which is characterized in that the power supply module is
Battery or AC power source.
7. transformer iron core grounding current measuring device according to claim 1-4, which is characterized in that further include
The cue module connecting with the current acquisition module is used for the prompt when the current information is more than setting electric current value
Module is prompted.
8. transformer iron core grounding current measuring device according to claim 7, which is characterized in that the setting electric current value
For any value in 90mA~110mA.
9. transformer iron core grounding current measuring device according to claim 7, which is characterized in that the cue module packet
Include auditory tone cues unit and/or light prompt unit.
10. transformer iron core grounding current measuring device according to claim 10, which is characterized in that the cue module
For the alarm lamp with voice prompt function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810714874.1A CN108828305A (en) | 2018-07-03 | 2018-07-03 | A kind of transformer iron core grounding current measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810714874.1A CN108828305A (en) | 2018-07-03 | 2018-07-03 | A kind of transformer iron core grounding current measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108828305A true CN108828305A (en) | 2018-11-16 |
Family
ID=64134552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810714874.1A Pending CN108828305A (en) | 2018-07-03 | 2018-07-03 | A kind of transformer iron core grounding current measuring device |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552411A (en) * | 2021-06-07 | 2021-10-26 | 广西电网有限责任公司贵港供电局 | Transformer core current data instrument |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202522618U (en) * | 2012-04-10 | 2012-11-07 | 重庆市电力公司长寿供电局 | Device for carrying out online monitoring on grounding of transformer core |
| CN103116063A (en) * | 2013-01-23 | 2013-05-22 | 大连新安越电力设备有限公司 | Transformer iron core ground connection electric current monitor |
| CN204287307U (en) * | 2014-11-07 | 2015-04-22 | 国网甘肃省电力公司甘南供电公司 | Transformer, current detection circuit based on transformer |
| CN207248983U (en) * | 2017-09-08 | 2018-04-17 | 西安乾通电器设备有限公司 | A kind of transformer iron core grounding current monitoring device |
-
2018
- 2018-07-03 CN CN201810714874.1A patent/CN108828305A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202522618U (en) * | 2012-04-10 | 2012-11-07 | 重庆市电力公司长寿供电局 | Device for carrying out online monitoring on grounding of transformer core |
| CN103116063A (en) * | 2013-01-23 | 2013-05-22 | 大连新安越电力设备有限公司 | Transformer iron core ground connection electric current monitor |
| CN204287307U (en) * | 2014-11-07 | 2015-04-22 | 国网甘肃省电力公司甘南供电公司 | Transformer, current detection circuit based on transformer |
| CN207248983U (en) * | 2017-09-08 | 2018-04-17 | 西安乾通电器设备有限公司 | A kind of transformer iron core grounding current monitoring device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552411A (en) * | 2021-06-07 | 2021-10-26 | 广西电网有限责任公司贵港供电局 | Transformer core current data instrument |
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Application publication date: 20181116 |
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