CN206209042U - Instrument for testing polarity of current transformer - Google Patents
Instrument for testing polarity of current transformer Download PDFInfo
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- CN206209042U CN206209042U CN201621108852.3U CN201621108852U CN206209042U CN 206209042 U CN206209042 U CN 206209042U CN 201621108852 U CN201621108852 U CN 201621108852U CN 206209042 U CN206209042 U CN 206209042U
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 230000009466 transformation Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
A kind of instrument for testing polarity of current transformer, including test suite and control assembly, test suite include double bias current tables；Control assembly includes battery pack, shift knob and cable.Above-mentioned instrument for testing polarity of current transformer, by the joint that double bias current tables are accessed Current Transformer Secondary coil, after user opens shift knob, in the moment of circuit turn-on, battery pack is to cable output current, the pointer of double bias current tables will be deflected when there is electric current in cable, because current transformer is labeled with polarity mark, therefore according to the both positive and negative polarity of battery pack, whether the polarity that the direction of polarity mark and pointer on current transformer can test out current transformer is correct, so as to improve measurement efficiency, the sensitivity of measurement and improve the security of test.
Description
Technical field
The utility model is related to technical field of power systems, more particularly to a kind of instrument for testing polarity of current transformer.
Background technology
At present, when carrying out the polarity test of current transformer at the scene, the main method of use is short circuit dry cell so that
The current range of universal meter is sealed in system by primary side by electric current, secondary side.
However, there is following drawback when being tested the polarity of current transformer using the above method：
1st, transformer coil has very big inductance, therefore uses conventional small-capacity cells, shows unobvious；
2nd, there is greater risk in short circuit dry cell two ends；
3rd, during short circuit dry cell, dry cell repid discharge, the life-span is very short；
4th, live patch is needed, complex operation, wiring is mixed and disorderly, unreliable；
5th, the reading of digimer flashes across, and is difficult to judge whether polarity wiring is correct.
Utility model content
Based on this, it is necessary to for how improving measurement efficiency, how to improve the sensitivity of measurement, how to improve test
A kind of technical problem of security, there is provided instrument for testing polarity of current transformer.
A kind of instrument for testing polarity of current transformer, including test suite and control assembly, the test suite include double inclined
Ammeter, the described pair of positive pole of bias current table is used to access the positive terminal of Current Transformer Secondary coil, and negative pole is used to access
The anode connector of Current Transformer Secondary coil, to form test loop；The control assembly include battery pack, shift knob with
And cable, the battery pack, the shift knob and the cable be sequentially connected in series to form analog current loop, and the cable is used
In the secondary coil through current transformer, during there is electric current in the cable, the electric current will be by current transformer
Secondary coil cause the described pair of throw of pointer of bias current table.
Wherein in one embodiment, the control assembly also includes first resistor, and the first resistor is connected serially to described
In analog current loop.
Wherein in one embodiment, the control assembly also includes indicator lamp, and the indicator lamp is connected serially to the simulation
In current loop.
Wherein in one embodiment, the first resistor is variable resistor.
Wherein in one embodiment, the indicator lamp is LED light.
Wherein in one embodiment, the test suite also includes second resistance, and the second resistance is connected serially to described
In test loop.
Wherein in one embodiment, the second resistance is variable resistor.
Wherein in one embodiment, the instrument for testing polarity of current transformer also includes housing, and the housing has to be received
Cavity volume, the test suite and the control assembly are placed in the host cavity.
Wherein in one embodiment, the host cavity has the first accommodating area and the second accommodating area, the test suite
It is arranged in first accommodating area, the control assembly is arranged in second accommodating area.
Wherein in one embodiment, state the first accommodating area and second accommodating area and be respectively symmetrically and be arranged at the housing
Both sides.
Above-mentioned instrument for testing polarity of current transformer, connecing for Current Transformer Secondary coil is accessed by by double bias current tables
Head, user open shift knob after, in the moment of circuit turn-on, battery pack to cable output current, when there is electric current in cable
The pointer of double bias current tables will be deflected, because current transformer is labeled with polarity mark, therefore both positive and negative polarity, electricity according to battery pack
Whether the polarity that the direction of polarity mark and pointer on current transformer can test out current transformer is correct, so as to improve
Measurement efficiency, the sensitivity for measuring and the security that improve test.
Brief description of the drawings
Fig. 1 is the electrical block diagram of instrument for testing polarity of current transformer in one embodiment；
Fig. 2 is the connection diagram of instrument for testing polarity of current transformer and current transformer in one embodiment；
Fig. 3 is the electrical block diagram of instrument for testing polarity of current transformer in another embodiment.
Specific embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be implemented with being much different from other manner described here, this area
Technical staff can do similar improvement in the case of without prejudice to the utility model intension, therefore the utility model does not receive following public affairs
The limitation of the specific embodiment opened.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than the dress for indicating or implying meaning
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In description of the present utility model, " multiple " is meant that at least two, such as two
It is individual, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or two interaction relationships of element, unless otherwise clearly restriction.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be as the case may be understood.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, it can be directly another
On one element or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level
", " on ", D score, "left", "right" and similar statement for illustrative purposes only, it is unique implementation to be not offered as
Mode.
Refer to Fig. 1.It is the electrical block diagram of instrument for testing polarity of current transformer 10 in one embodiment, a kind of
Instrument for testing polarity of current transformer 10 includes test suite 110 and control assembly 120.Control assembly 120 be used for analog current with
The secondary coil of current transformer is set to act so as to output current.That is, control assembly 120 is used for analog current so that electricity
The secondary coil of current transformer output current in secondary coil after the analog current for sensing outside.Test suite 110 is used for
The electric current of the secondary coil output according to current transformer enters the deflection of line pointer, the side of the electric current to indicate secondary coil to export
To.
Fig. 2 is referred to, it is the connection signal of instrument for testing polarity of current transformer and current transformer in one embodiment
Figure, with reference to Fig. 1, for example, test suite 110 includes double bias current Table As 1.For example, the positive pole of double bias current Table As 1 is used to access electricity
The positive terminal S1 of current transformer secondary coil, negative pole is used to access the anode connector S2 of Current Transformer Secondary coil 130, shape
Into test loop.For example, control assembly 120 includes battery pack E1, shift knob SB1 and cable LINE.For example, battery pack
E1, shift knob SB1 and cable LINE are sequentially connected in series to form analog current loop, and cable LINE is used for through current transformer
Secondary coil 130, double bias current Table As 1 will be caused by the secondary coil of current transformer when there is electric current in cable LINE
Throw of pointer.
Above-mentioned instrument for testing polarity of current transformer 10, Current Transformer Secondary coil is accessed by by double bias current Table As 1
Joint, after user opens shift knob SB1, in the moment of circuit turn-on, battery pack E1 is to cable LINE output currents, cable
The pointer of double bias current Table As 1 will be deflected when there is electric current in LINE, because current transformer is labeled with polarity mark, therefore root
The pole of current transformer can be tested out according to the polarity mark on the both positive and negative polarity of battery pack E1, current transformer and the direction of pointer
Property it is whether correct, so as to improve measurement efficiency, the sensitivity of measurement and improve the security of test.
It is appreciated that the instrument for testing polarity of current transformer of the present embodiment exports two groups of wiring, current transformer is switched to
Secondary joint and through secondary coil.Testing button is pressed under tester, in the moment of circuit turn-on, by double electricity partially
The sensing of flow table, you can whether correct with the polarity for confirming current transformer.It should be noted that the double electricity partially in the present embodiment
Flow table dish existing structure, its specific structure and principle see prior art or drawn after being summarized to prior art,
Here is omitted.
Fig. 3 is referred to, it is the electrical block diagram of instrument for testing polarity of current transformer in another embodiment, to protect
The circuit safety for protecting control assembly 120 avoids circuit excessively stream, for example, control assembly 120 also includes first resistor R1, the first electricity
Resistance R1 is connected serially in analog current loop.In this way, by the electric current and voltage in the adjustable analog current loops of first resistor R1, keeping away
Exempt from circuit excessively stream.For ease of the electric current of adjustment circuit, for example, first resistor R1 is variable resistor.
To ensure shift knob SB1 shut-offs or connecting, for example, control assembly 120 also includes indicator lamp L1, indicator lamp L1 strings
It is coupled in analog current loop.In this way, shift knob SB1 shut-offs are that lamp goes out, shift knob SB1 connections are bright lamps, are surveyed in pause
The examination stage, When lit user can turn off shift knob SB1, electric energy is saved, while using the also user friendly surveys of indicator lamp L1
Examination.For example, indicator lamp L1 is LED light L1, testing efficiency is improved with the performance for effectively utilizing LED.
For the circuit safety for protecting test suite 110 avoids circuit excessively stream, for example, test suite 110 also includes second
Resistance R2, second resistance R2 is connected serially in test loop.With reference to Fig. 2 and Fig. 3, in the present embodiment, one end of second resistance R2 leads to
Cross the anode connector S2 that the first wire is connected to Current Transformer Secondary coil 130, the negative pole of the other end and double bias current Table As 1
Connection.The positive pole of double bias current Table As 1 is connected to the positive terminal S1 of Current Transformer Secondary coil 130 by the second wire.Such as
This, by the electric current and voltage in the adjustable analog current loops of second resistance R2, it is to avoid circuit excessively stream.For ease of adjustment circuit
Electric current, for example, second resistance R2 is variable resistor.
In the present embodiment, first resistor R1 is arranged in series between shift knob SB1 and indicator lamp L1.Indicator lamp L1 passes through
Cable LINE is connected with the positive pole of battery pack E1.One end of shift knob SB1 is connected with the negative pole of battery pack E1, the other end and
One resistance R1 is connected.
It is appreciated that in the present embodiment, utilizing " direct current actinobolia ", in the moment of circuit turn-on, by double bias current tables
Sensing, you can it is whether correct with the polarity for confirming current transformer, and setting by protective resistance R1 and protective resistance R2
Put, have adjusted the electric current of circuit, on the one hand, make measurement sensitiveer；On the other hand, component safety is also protected.
To improve testing efficiency, for example, instrument for testing polarity of current transformer also includes housing, housing has host cavity, surveys
Examination component and control assembly are placed in host cavity.For example, host cavity has the first accommodating area and the second accommodating area, test suite
It is arranged in the first accommodating area, control assembly is arranged in the second accommodating area.For example, stating the first accommodating area and the second accommodating differentiation
The both sides of housing are not symmetricly set in.
In this way, carried by housing, with conveniently advantage, when user operates the tester of the present embodiment,
Only cable LINE need to be passed through the secondary coil of current transformer, and press shift knob SB1, by the double bias current Table As 1 of observation
Pointer deflection can confirm whether the polarity of current transformer correct, it is convenient and swift.
It is noted that the utility model can be applied to the equipment acceptance inspection work of power system, reduce worked
Risk in journey, facilitates relay protection teams and groups to carry out polarity test work；The utility model also can empirically be shared and training and learning
Instrument, improve operation, teams and groups' personnel equipment's operation and maintenance level, improve secondary device safe and stable operation level；This practicality
It is new also can be as the reaction of the equipment general level of the health, for the determination of accident event defect cause.
The utility model has the advantage of：
1st, conventional small-capacity cells are overcome, unconspicuous problem is shown, by adjusting circuit internal resistance value, Ke Yigai
Power transformation flow valuve；
2nd, short circuit dry cell two ends are overcome and there is a problem of greater risk, without short circuit dry cell, heat is provided with circuit
Quick resistance, protection circuit occurs without excessively stream；
When the 3rd, overcoming short circuit dry cell, dry cell repid discharge, life-span very short problem, without short circuit dry cell, makes
Dry cell discharge current reduces, stabilization, extends battery；
4th, the live patch of needs is overcome, complex operation, wiring is mixed and disorderly, and insecure problem only needs to behaviour during operation
Make a button；
5th, whether the reading for overcoming digimer flashes across, and is difficult to judge the correct problem of polarity wiring, adopts
With double inclined formula ammeters, make polar orientation very clear.
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 several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of instrument for testing polarity of current transformer, it is characterised in that including：
Test suite, the test suite includes double bias current tables, and the described pair of positive pole of bias current table is used to access Current Mutual Inductance
The positive terminal of device secondary coil, negative pole is used to access the anode connector of Current Transformer Secondary coil, to form test loop；
Control assembly, the control assembly includes battery pack, shift knob and cable, the battery pack, the shift knob
And the cable is sequentially connected in series to form analog current loop, the cable is used for the secondary coil through current transformer, with
When there is electric current in the cable, the electric current causes the described pair of finger of bias current table by the secondary coil of current transformer
Pin is deflected.
2. instrument for testing polarity of current transformer according to claim 1, it is characterised in that the control assembly also includes the
One resistance, the first resistor is connected serially in the analog current loop.
3. instrument for testing polarity of current transformer according to claim 2, it is characterised in that the control assembly also includes referring to
Show lamp, the indicator lamp is connected serially in the analog current loop.
4. instrument for testing polarity of current transformer according to claim 2, it is characterised in that the first resistor is for can power transformation
Resistance.
5. instrument for testing polarity of current transformer according to claim 3, it is characterised in that the indicator lamp is that LED is indicated
Lamp.
6. instrument for testing polarity of current transformer according to claim 1, it is characterised in that the test suite also includes the
Two resistance, the second resistance is connected serially in the test loop.
7. instrument for testing polarity of current transformer according to claim 6, it is characterised in that the second resistance is for can power transformation
Resistance.
8. instrument for testing polarity of current transformer according to claim 1, it is characterised in that the current transformer polarity is surveyed
Examination instrument also includes housing, and the housing has host cavity, and the test suite and the control assembly are placed in the host cavity
In.
9. instrument for testing polarity of current transformer according to claim 8, it is characterised in that the host cavity has first to hold
Area and the second accommodating area are put, the test suite is arranged in first accommodating area, the control assembly is arranged at described
In two accommodating areas.
10. instrument for testing polarity of current transformer according to claim 9, it is characterised in that first accommodating area and institute
State the second accommodating area and be respectively symmetrically the both sides for being arranged at the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621108852.3U CN206209042U (en) | 2016-10-08 | 2016-10-08 | Instrument for testing polarity of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621108852.3U CN206209042U (en) | 2016-10-08 | 2016-10-08 | Instrument for testing polarity of current transformer |
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| Publication Number | Publication Date |
|---|---|
| CN206209042U true CN206209042U (en) | 2017-05-31 |
Family
ID=58762543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621108852.3U Active CN206209042U (en) | 2016-10-08 | 2016-10-08 | Instrument for testing polarity of current transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957381A (en) * | 2018-08-28 | 2018-12-07 | 广东电网有限责任公司 | A kind of instrument for testing polarity of current transformer |
| CN109375047A (en) * | 2018-09-25 | 2019-02-22 | 深圳供电局有限公司 | System and method for testing double-end asynchronous polarity of high-voltage transmission line |
| CN110751889A (en) * | 2019-10-30 | 2020-02-04 | 阳皓 | Method for constructing current model |
| CN111025189A (en) * | 2020-01-08 | 2020-04-17 | 山东山大电力技术股份有限公司 | Low-current grounding line selection CT test system and test method |
| CN111103557A (en) * | 2019-12-31 | 2020-05-05 | 中国南方电网有限责任公司 | Transformer homodyne protection CT polarity verification method and system |
-
2016
- 2016-10-08 CN CN201621108852.3U patent/CN206209042U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957381A (en) * | 2018-08-28 | 2018-12-07 | 广东电网有限责任公司 | A kind of instrument for testing polarity of current transformer |
| CN108957381B (en) * | 2018-08-28 | 2020-06-09 | 广东电网有限责任公司 | Polarity tester for current transformer |
| CN109375047A (en) * | 2018-09-25 | 2019-02-22 | 深圳供电局有限公司 | System and method for testing double-end asynchronous polarity of high-voltage transmission line |
| CN109375047B (en) * | 2018-09-25 | 2020-10-16 | 深圳供电局有限公司 | A double-ended asynchronous polarity testing system and method for high-voltage transmission lines |
| CN110751889A (en) * | 2019-10-30 | 2020-02-04 | 阳皓 | Method for constructing current model |
| CN111103557A (en) * | 2019-12-31 | 2020-05-05 | 中国南方电网有限责任公司 | Transformer homodyne protection CT polarity verification method and system |
| CN111103557B (en) * | 2019-12-31 | 2021-11-09 | 中国南方电网有限责任公司 | Transformer homodyne protection CT polarity verification method and system |
| CN111025189A (en) * | 2020-01-08 | 2020-04-17 | 山东山大电力技术股份有限公司 | Low-current grounding line selection CT test system and test method |
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