CN108732459A - A kind of current transformer polarity testing method - Google Patents
A kind of current transformer polarity testing method Download PDFInfo
- Publication number
- CN108732459A CN108732459A CN201810244730.4A CN201810244730A CN108732459A CN 108732459 A CN108732459 A CN 108732459A CN 201810244730 A CN201810244730 A CN 201810244730A CN 108732459 A CN108732459 A CN 108732459A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- polarity
- secondary side
- triode
- testing method
- 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.)
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Classifications
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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
- G01R31/72—Testing of electric windings
Abstract
The invention discloses a kind of current transformer polarity testing method, the primary side of current transformer carries out drooping test using the dry cell within 10 volts；The secondary side of current transformer introduces instrument for testing polarity of current transformer, and by red light buzzer and green light buzzer, to current transformer, whether subtractive polarity is judged.The current transformer polarity testing method of the present invention, may be implemented it is more accurate, delicately the polarity of current transformer is tested, increase the accuracy rate of test, to improve working efficiency.
Description
Technical field
The present invention relates to a kind of current transformer polarity testing methods.
Background technology
After the 110KV transformers with casing install, an impedance of transformer (CT) is larger.Current China is general
It is, and install after reference preposition in the when polarity test of completion change on ground for CT installations all over the test method that uses
Test report before CT installations judges polarity secondary circuit then surveys the method for core by secondary up-flow or core
Examination, wrong secondary circuit, easily causes incorrect polarity after this method will cause CT anti-loaded.
Since traditional test method is difficult to realize more accurately, delicately be unfolded to study to the drawbacks of test polarity.Cause
How this, judge that polar correctness is a more difficult task.Based on this, research should be tried to work out with tester
New mode is to solve this test method, to increase the accuracy rate of test, to the working efficiency of the personnel of improving and equipment.
Invention content
The purpose of the present invention is overcoming the deficiencies of existing technologies, a kind of current transformer polarity testing method is provided, is realized
More accurately, delicately the polarity of current transformer is tested, increases the accuracy rate of test, to improve working efficiency.
Realizing the technical solution of above-mentioned purpose is：A kind of current transformer polarity testing method, includes the following steps：
S1, the primary side of current transformer carry out drooping test using the dry cell within 10 volts；
The secondary side of S2, current transformer introduce instrument for testing polarity of current transformer, pass through red light buzzer and green light bee
Ringing, to current transformer, whether subtractive polarity is judged device.
A kind of above-mentioned current transformer polarity testing method, in step S1, the primary side of the current transformer is installed
There are dry cell, boost module, capacitance, switch and a primary side equivalent resistance, the anode of the dry cell, boost module, switch, one
Secondary side equivalent resistance, the primary side of current transformer and the cathode of dry cell are sequentially connected, and one end of the capacitance is opened with described
It closes and is connected, the other end is connected with the abutment end of the dry cell and the primary side of current transformer.
A kind of above-mentioned current transformer polarity testing method, in step S2, the instrument for testing polarity of current transformer packet
Include secondary side signal receiver, comparator, triode and polarity display module, secondary side, the secondary side of the current transformer
Signal receiver, comparator, triode and polarity display module are sequentially connected, the red light buzzer and green light buzzer composition
The polarity display module, the red light buzzer and green light buzzer are connected with the triode respectively.
A kind of above-mentioned current transformer polarity testing method, the secondary side signal receiver receive the Current Mutual Inductance
The secondary side signal of device；Then whether the comparator judges current transformer by the secondary side signal of the current transformer
Subtractive polarity, if subtractive polarity, then triode described in the comparator drives converts the secondary side signal of current transformer to 5V
Voltage, and the triode drives the green light buzzer warning；If not subtractive polarity, triode described in the comparator drives will
The secondary side signal of current transformer is converted into 5V voltages, and the triode drives the red light buzzer warning.
The current transformer polarity testing method of the present invention is only needed when carrying out the polarity test of current transformer per phase
It droops once, saves a large amount of manpower and material resources, while also saving valuable time, the polarity test at scene is only needed
Two people can complete it, advantageously ensure that the safety and steady operation of circuit, promote the raising of working efficiency.
Description of the drawings
Fig. 1 is the usage state diagram of the current transformer polarity testing method of the present invention.
Specific implementation mode
It is right below in conjunction with the accompanying drawings in order to make those skilled in the art be better understood when technical scheme of the present invention
Its specific implementation mode is described in detail：
Referring to Fig. 1, highly preferred embodiment of the present invention, a kind of current transformer polarity testing method, include the following steps：
S1, the primary side of current transformer carry out drooping test using the dry cell within 10 volts；
The secondary side of S2, current transformer introduce instrument for testing polarity of current transformer, pass through red light buzzer and green light bee
Ringing, to current transformer, whether subtractive polarity is judged device.
In step S1, the primary side of Current Transmit is equipped with dry cell 11, boost module 12, capacitance 13, switch 14
With primary side equivalent resistance 15, anode, boost module 12, switch 14, primary side equivalent resistance 15, the Current Mutual Inductance of dry cell 11
The primary side of device CT and the cathode of dry cell 1 are sequentially connected, and one end of capacitance 13 is connected with switch 14, the other end and dry cell 11
It is connected with the abutment end of the primary side of Current Transmit.
In step S2, instrument for testing polarity of current transformer includes secondary side signal receiver 21, comparator 22, triode 23
With polarity display module 24, secondary side, secondary side signal receiver 21, comparator 22,23 and of triode of Current Transmit
Polarity display module 24 is sequentially connected, red light buzzer and the polarity display module of green light buzzer group, red light buzzer and green
Lamp buzzer is connected with triode 23 respectively.
Secondary side signal receiver 21 receives the secondary side signal of Current Transmit；Then comparator 22 is mutual by electric current
The secondary side signal of sensor judge current transformer whether subtractive polarity, if subtractive polarity, then comparator 22 drive triode 23 will
The secondary side signal of current transformer is converted into 5V voltages, and triode 23 drives green light buzzer warning；If not subtractive polarity, than
Triode is driven to convert the secondary side signal of current transformer to 5V voltages compared with device 22, and triode 23 drives red light buzzer
Alarm.
When carrying out polarity test to current transformer, the dry cell within 10 volts is utilized in the primary side of current transformer
It carrying out drooping operation, the induced current of Current Transformer Secondary side at this time, voltage are all smaller, but the sensitive time is very short,
Only there was only 5-6 μ s.It to obtain more accurate secondary singal, and is effectively kept, it is desirable that signal receiving circuit
With peak-value-holding function.
Tester judges positive and negative anodes to drive triode to have flexibility and the simplicity of signal processing by comparing device
Higher, security reliability has also reached higher degree with the degree of automation, has more advantages.Based on this, should choose
Comparator is conducive to reinforce processing of the tester to signal.
Red light buzzer and the polarity display module of green light buzzer group, green light buzzer warning indicate subtractive polarity, red light
Buzzer warning indicates non-subtractive polarity, and dedicated switch is arranged on the power supply of buzzer.This polarity display module have compared with
For intuitive advantage.In addition, tester can be carried out at the same time polarity test to multigroup current transformer, can both efficiently reduce
The number drooped, and manpower and time can be saved.
By the investigation and extraction to the Site Detection result in different substations, and according to actual service work.
Following result is obtained：The current transformer polarity testing method that test demonstrates the present invention can validity test current transformer
Polarity can still be effectively reflected the current transformer of no-load voltage ratio 4000/5 polarity of current transformer, only need to take per phase
It draws once, saves a large amount of manpower and material resources, while also saving valuable time, two are only needed for the polarity test at scene
People can complete it, advantageously ensure that the safety and steady operation of circuit, promote the raising of working efficiency.
In conclusion the current transformer polarity testing method of the present invention, primary per mutually only needing to droop, save a large amount of
Manpower and material resources, while valuable time is also saved, only need two people that can complete it polarity test at scene, favorably
In the safety and steady operation for ensureing circuit, the raising of working efficiency is promoted.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (4)
1. a kind of current transformer polarity testing method, which is characterized in that include the following steps：
S1, the primary side of current transformer carry out drooping test using the dry cell within 10 volts；
The secondary side of S2, current transformer introduce instrument for testing polarity of current transformer, pass through red light buzzer and green light buzzer
To current transformer, whether subtractive polarity is judged.
2. a kind of current transformer polarity testing method according to claim 1, which is characterized in that described in step S1
The primary side of current transformer is equipped with dry cell, boost module, capacitance, switch and primary side equivalent resistance, the dry cell
Anode, boost module, switch, primary side equivalent resistance, the primary side of current transformer and dry cell cathode be sequentially connected,
One end of the capacitance is connected with the switch, the abutment end phase of the other end and the dry cell and the primary side of current transformer
Even.
3. a kind of current transformer polarity testing method according to claim 1, which is characterized in that described in step S2
Instrument for testing polarity of current transformer includes secondary side signal receiver, comparator, triode and polarity display module, the electric current
Secondary side, secondary side signal receiver, comparator, triode and the polarity display module of mutual inductor are sequentially connected, the red light
Buzzer and green light buzzer form the polarity display module, and the red light buzzer and green light buzzer are respectively with described three
Pole pipe is connected.
4. a kind of current transformer polarity testing method according to claim 3, which is characterized in that the secondary side signal
Receiver receives the secondary side signal of the current transformer；Then the secondary side that the comparator passes through the current transformer
Signal judge current transformer whether subtractive polarity, if subtractive polarity, then triode described in the comparator drives is by Current Mutual Inductance
The secondary side signal of device is converted into 5V voltages, and the triode drives the green light buzzer warning；If not subtractive polarity, described
Triode described in comparator drives converts the secondary side signal of current transformer to 5V voltages, and described in triode driving
Red light buzzer warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244730.4A CN108732459A (en) | 2018-03-23 | 2018-03-23 | A kind of current transformer polarity testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244730.4A CN108732459A (en) | 2018-03-23 | 2018-03-23 | A kind of current transformer polarity testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108732459A true CN108732459A (en) | 2018-11-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810244730.4A Pending CN108732459A (en) | 2018-03-23 | 2018-03-23 | A kind of current transformer polarity testing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108732459A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278790A (en) * | 2012-11-29 | 2013-09-04 | 杭州凯达电力建设有限公司 | Fast testing instrument of variable ratio and polarity of current transformer and testing method thereof |
| CN103454554A (en) * | 2013-08-30 | 2013-12-18 | 广东威恒输变电工程有限公司 | Polarity tester for current transformer |
| CN106771837A (en) * | 2016-12-23 | 2017-05-31 | 国网山东省电力公司菏泽供电公司 | A kind of current transformer remote polarity tester |
-
2018
- 2018-03-23 CN CN201810244730.4A patent/CN108732459A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278790A (en) * | 2012-11-29 | 2013-09-04 | 杭州凯达电力建设有限公司 | Fast testing instrument of variable ratio and polarity of current transformer and testing method thereof |
| CN103454554A (en) * | 2013-08-30 | 2013-12-18 | 广东威恒输变电工程有限公司 | Polarity tester for current transformer |
| CN106771837A (en) * | 2016-12-23 | 2017-05-31 | 国网山东省电力公司菏泽供电公司 | A kind of current transformer remote polarity tester |
Non-Patent Citations (1)
| Title |
|---|
| 谢冰等: "电流互感器极性测试新方法的研究", 《中国高新技术企业》 * |
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Application publication date: 20181102 |