CN204256100U - Instrument for testing polarity of current transformer - Google Patents
Instrument for testing polarity of current transformer Download PDFInfo
- Publication number
- CN204256100U CN204256100U CN201420790322.6U CN201420790322U CN204256100U CN 204256100 U CN204256100 U CN 204256100U CN 201420790322 U CN201420790322 U CN 201420790322U CN 204256100 U CN204256100 U CN 204256100U
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- phase
- branch road
- current transformer
- instrument
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 7
- 238000004804 winding Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model provides a kind of instrument for testing polarity of current transformer, and wherein instrument for testing polarity of current transformer comprises: casing, casing is provided with A phase jack, B phase jack, C phase jack and N phase jack; Test circuit, is arranged in casing, and the first end of test circuit is connected with N phase jack, and test circuit comprises power supply and switch; A phase branch road, B phase branch road and C phase branch road, be arranged in casing, and the first end of A phase branch road is connected with A phase jack, and the first end of B phase branch road is connected with B phase jack, and the first end of C phase branch road is connected with C phase jack; Switch knob, is arranged on rotationally on casing, switch knob is provided with plectrum, and the first end of plectrum is connected with the second end of test circuit.The utility model can effectively solve instrument for testing polarity of current transformer of the prior art switch phase place time complex operation, the problem of easy virtual connection.
Description
Technical field
The utility model relates to field of electrical equipment, in particular to a kind of instrument for testing polarity of current transformer.
Background technology
Current transformer is equipment conventional in electric power facility, and current transformer is winding and Secondary Winding once.Instrument for testing polarity of current transformer is used to detect the whether correct equipment of the polarity connected mode of current transformer.
In prior art, this test operation of instrument for testing polarity of current transformer needs two people to carry out usually, one people stands after intermediate switchgear cabinet cabinet, by power supply, normally a joint dry cell or a group storage battery device use in the positive pole of wire of band wire clamp and A, B, C three-phase of a winding one to be connected mutually, negative pole is connected with the N phase of a winding, forms loop.Another people stands before terminal block, a phase corresponding with it in secondary circuit A, B, C is connected to multimeter positive pole, negative pole is connected to the N phase of secondary circuit, thus by observe multimeter pointer rise folk prescription to, reach the equipment whether the polarity connected mode that detects current transformer correct.
The operation of above-mentioned instrument for testing polarity of current transformer be rely on manual switching wire clamp, artificial mechanism touch dry cell or battery positive voltage reach observed folk prescription to.Aforesaid operations has following shortcoming:
1, need manual switchover wire clamp during commutation, conventional efficient is reduced greatly;
2, according to the requirement of current transformer polarity testing experiment, experiment needs repeatedly to carry out that wire connects, the work of split cell, causes complex operation step, and easily causes virtual connection, extend the activity duration.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of instrument for testing polarity of current transformer, with solve instrument for testing polarity of current transformer of the prior art switch phase place time complex operation, the problem of easy virtual connection.
To achieve these goals, the utility model provides a kind of instrument for testing polarity of current transformer, comprising: casing, casing is provided with A phase jack, B phase jack, C phase jack and N phase jack; Test circuit, is arranged in casing, and the first end of test circuit is connected with N phase jack, and test circuit comprises power supply and switch; A phase branch road, B phase branch road and C phase branch road, be arranged in casing, and the first end of A phase branch road is connected with A phase jack, and the first end of B phase branch road is connected with B phase jack, and the first end of C phase branch road is connected with C phase jack; Switch knob, be arranged on rotationally on casing, switch knob is provided with plectrum, and the first end of plectrum is connected with the second end of test circuit, and when switch knob rotates, the second end of plectrum selectively connects the second end of the second end of A phase branch road or the second end of B phase branch road or C phase branch road.
Further, instrument for testing polarity of current transformer also comprises: A phase light emitting diode, is arranged on A phase branch road.
Further, instrument for testing polarity of current transformer also comprises: B phase light emitting diode, is arranged on B phase branch road.
Further, instrument for testing polarity of current transformer also comprises: C phase light emitting diode, is arranged on C phase branch road.
Further, test circuit also comprises: variable resistor; Current knob, is connected with variable resistor for regulating variable-resistance resistance value.
Further, test circuit also comprises: protective resistance.
Further, switch is maintained switch.
Further, the power folder for sandwiched power supply is provided with in casing.
Application the technical solution of the utility model, the casing of instrument for testing polarity of current transformer is provided with rotating switch knob, and switch knob has plectrum, and plectrum is selectable to be connected with A phase branch road, B phase branch road and C phase branch road.Therefore operating personnel are when using instrument for testing polarity of current transformer to test, only need rotate switch knob and both can reach the object switching A, B, C three-phase output current, and can ensure, once only from A, B, C mono-phase outlet output current, to enormously simplify operation steps.In addition the on/off of instrument for testing polarity of current transformer is by switch control rule, eliminates in experiment repeatedly to carry out that wire connects, the work of split cell, and then shortens the activity duration, eliminates the problem of virtual connection.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the body structure schematic diagram of the instrument for testing polarity of current transformer according to embodiment of the present utility model; And
Fig. 2 shows the structural representation of the test circuit of the instrument for testing polarity of current transformer according to embodiment of the present utility model.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, casing; 11, power folder; 20, test circuit; 30, switch knob; 31, plectrum; 40, power supply; 50, switch; 61, variable resistor; 62, current knob; 70, protective resistance.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, the instrument for testing polarity of current transformer provided in the present embodiment comprises: casing 10, test circuit 20., A phase branch road, B phase branch road, C phase branch road and switch knob 30.Casing 10 is provided with A phase jack, B phase jack, C phase jack and N phase jack.Test circuit 20 is in casing 10, and the first end of test circuit 20 is connected with N phase jack, and test circuit 20 comprises power supply 40 and switch 50.A phase branch road, B phase branch road and C phase branch road are arranged in casing 10, and the first end of A phase branch road is connected with A phase jack, and the first end of B phase branch road is connected with B phase jack, and the first end of C phase branch road is connected with C phase jack.Switch knob 30 is arranged on casing 10 rotationally, switch knob 30 is provided with plectrum 31, the first end of plectrum 31 is connected with the second end of test circuit 20, and when switch knob 30 rotates, the second end of plectrum 31 selectively connects the second end of the second end of A phase branch road or the second end of B phase branch road or C phase branch road.Power supply 40 to be arranged on test circuit 20 and to be arranged in casing 10.Switch 50 to be arranged on test circuit 20 and to be arranged on casing 10.
The technical scheme of application the present embodiment, the casing 10 of instrument for testing polarity of current transformer is provided with rotating switch knob 30, and switch knob 30 has plectrum 31, and plectrum 31 is selectable to be connected with A phase branch road, B phase branch road and C phase branch road.Therefore workman is when using instrument for testing polarity of current transformer to test, and only need rotate the object that switch knob 30 both can reach handoff leg, and can ensure once from A, B, C mono-phase outlet output current.Enormously simplify operation steps.In addition power supply 40 break-make of instrument for testing polarity of current transformer controls by switch 50, eliminates in experiment repeatedly to carry out that wire connects, the work of split cell, and then shortens the activity duration, eliminates the problem of virtual connection.
In the present embodiment, the A phase jack on casing 10, B phase jack, C phase jack and N phase jack adopt yellow, green, redness and black standard to test wire jack respectively, for realizing the connection of being with wire clamp wire and device.Adopt above-mentioned standard jacks that workman can be facilitated to identify each jack, and greatly improve operating speed.
As depicted in figs. 1 and 2, in the technical scheme of the present embodiment, instrument for testing polarity of current transformer also comprises: A phase light emitting diode, B phase light emitting diode and C phase light emitting diode.A phase light emitting diode is arranged on A phase branch road, and B phase light emitting diode is arranged on B phase branch road, and C phase light emitting diode is arranged on C phase branch road.In the present embodiment, when switch knob 30 rotates to A phase branch road, corresponding A phase light emitting diode is bright, when switch knob 30 rotates to B phase branch road, corresponding B phase light emitting diode is bright, and when switch knob 30 rotates to C phase branch road, corresponding C phase light emitting diode is bright.Utilize light emitting diode, switch knob 30 can be differentiated clearly and which have selected carried out electric current output mutually.
As depicted in figs. 1 and 2, in the technical scheme of the present embodiment, test circuit 20 also comprises variable resistor 61 and current knob 62, and current knob 62 is connected the resistance value for regulating variable resistor 61 with variable resistor 61.By rotatory current knob 62, the size of electric current in test circuit 20 can be regulated, and then can use in the current transformer Polarity experiment of different electric pressure, different no-load voltage ratio.More specifically, in the present embodiment, instrument for testing polarity of current transformer, after carrying out dividing potential drop by variable resistor 60, can realize the verification of the different electric pressure of 10kV, 35kV, 110kV, different no-load voltage ratio institute Current Transformer polarity connection line.
As shown in Figure 2, in the technical scheme of the present embodiment, test circuit 20 also comprises protective resistance 70.Protective resistance 70 plays current-limiting protection effect, and more specifically, in the present embodiment, variable resistor 61 and protective resistance 70 play current-limiting protection effect jointly.By regulating protective resistance 70 and variable resistor 61; electric current can be made by current transformer, and by after electromagnetic induction to 2 connection sides, first can meet the range of multimeter; both can not be too small to such an extent as to do not observe, the indicator of multimeter also can not be caused to damage because of excessive.Meanwhile, variable resistor 61 can play the effect regulating electric current, makes this device be applicable to the mutual inductor polarity test of various common voltage grade.
As depicted in figs. 1 and 2, in the technical scheme of the present embodiment, switch 50 is maintained switch.Crawl maintained switch 50 presses sustainable turning circuit, and having pressed can disconnecting circuit, plays the effect controlling test circuit 20 and whether be energized.Utilize maintained switch 50, single can be realized and press and form loop all the time, make output mutually charged, again press and make output phase dead electricity, thus realize experiment to repeatedly test pointer rise folk prescription to requirement, make operation comparatively simple.
As shown in Figure 1, in the technical scheme of the present embodiment, in casing 10, be provided with the power folder 11 for sandwiched power supply 40.Power folder 11 is used for holding and fixed power source 40, and in the present embodiment, power supply 40 is four joints battery, and provides direct supply.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. an instrument for testing polarity of current transformer, is characterized in that, comprising:
Casing (10), described casing (10) is provided with A phase jack, B phase jack, C phase jack and N phase jack;
Test circuit (20), be arranged in described casing (10), the first end of described test circuit (20) is connected with described N phase jack, and described test circuit (20) comprises power supply (40) and switch (50);
A phase branch road, B phase branch road and C phase branch road, be arranged in described casing (10), the first end of described A phase branch road is connected with described A phase jack, and the first end of described B phase branch road is connected with described B phase jack, and the first end of described C phase branch road is connected with described C phase jack;
Switch knob (30), be arranged on described casing (10) rotationally, described switch knob (30) is provided with plectrum (31), the first end of described plectrum (31) is connected with the second end of described test circuit (20), and when described switch knob (30) rotates, the second end of described plectrum (31) selectively connects the second end of the second end of described A phase branch road or the second end of described B phase branch road or described C phase branch road.
2. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described instrument for testing polarity of current transformer also comprises:
A phase light emitting diode, is arranged on described A phase branch road.
3. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described instrument for testing polarity of current transformer also comprises:
B phase light emitting diode, is arranged on described B phase branch road.
4. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described instrument for testing polarity of current transformer also comprises:
C phase light emitting diode, is arranged on described C phase branch road.
5. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described test circuit (20) also comprises:
Variable resistor (61);
Current knob (62), is connected the resistance value for regulating described variable resistor (61) with described variable resistor (61).
6. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described test circuit (20) also comprises: protective resistance (70).
7. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described switch (50) is maintained switch.
8. instrument for testing polarity of current transformer according to claim 1, is characterized in that, is provided with the power folder (11) for power supply described in sandwiched (40) in described casing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420790322.6U CN204256100U (en) | 2014-12-11 | 2014-12-11 | Instrument for testing polarity of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420790322.6U CN204256100U (en) | 2014-12-11 | 2014-12-11 | Instrument for testing polarity of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204256100U true CN204256100U (en) | 2015-04-08 |
Family
ID=52960393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420790322.6U Expired - Fee Related CN204256100U (en) | 2014-12-11 | 2014-12-11 | Instrument for testing polarity of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204256100U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502792A (en) * | 2014-12-11 | 2015-04-08 | 国家电网公司 | Polarity tester for current transformer |
-
2014
- 2014-12-11 CN CN201420790322.6U patent/CN204256100U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502792A (en) * | 2014-12-11 | 2015-04-08 | 国家电网公司 | Polarity tester for current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20181211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |