CN207067314U - A kind of Portable novel CT polarity testers - Google Patents
A kind of Portable novel CT polarity testers Download PDFInfo
- Publication number
- CN207067314U CN207067314U CN201720951487.0U CN201720951487U CN207067314U CN 207067314 U CN207067314 U CN 207067314U CN 201720951487 U CN201720951487 U CN 201720951487U CN 207067314 U CN207067314 U CN 207067314U
- Authority
- CN
- China
- Prior art keywords
- switch
- normal
- relay
- polarity
- portable novel
- 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.)
- Active
Links
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Power system relay protection field is the utility model is related to, more particularly, to a kind of Portable novel CT polarity testers.A kind of Portable novel CT polarity testers, including testing cassete, characterized in that, described testing cassete includes relay, hand push button, power switch, automatic/hand switch, the first normal on/off switch, trigger switch, the first normal on/off switch, power supply, CT first winding interfaces；For tester by automatic and hand-operated chargeover switch and multiphase trigger switch, when automated location is threaded to, instrument carries out three-phase polarity test, when being threaded to manual position, carries out single-phase polarity test respectively as needed.
Description
Technical field
Power system relay protection field is the utility model is related to, more particularly, to a kind of Portable novel CT poles
Property tester.
Background technology
Current transformer is very important force device in power system, and it once on high-tension side high current will pass through friendship
Become magnetic flux and be changed into the uses such as secondary current supply protection, measurement, recording, metering.Because protective relaying device is to transformer
Polarity has different polar configurations requirements, if secondary current loop polarity is reversed, it will make the phase place change 180 of secondary side
Degree, so as to cause protection device malfunction or the harm of refused action, if tripping will cause tripping operation of bypassing the immediate leadership, entail dangers to is gone back when serious and is set
Standby and personal safety.Therefore, the correct polarity correctness for judging current transformer is a highly important job.
Typically in polarity measurement, using a section or more piece dry cell as power end, by the both positive and negative polarity of battery
The both ends of current transformer first winding are coupled with, while a pointer milliammeter is accessed in secondary winding, pass through ten thousand
Make to judge with the deflection of table.Whether next to that it is correct intuitively to carry out detection polarity using the polarity tester of specialty.
DC battery method test the shortcomings that be：1. reusing dry cell easily causes damage, it is inconvenient to replace.2. work as
, it is necessary to more batteries of connecting, operation inconvenience when no-load voltage ratio is bigger.3. need repeatedly to overlap line in operation complete
Into process is quite cumbersome, adds security risk, can only test a phase every time, it is impossible to while test three-phase polarity.
Detection mode using the polarity tester of specialty has feasibility for large-scale production, but is checked and accepted in relay protection
During be not suitable for using, instrument price is expensive, and instrument carries out carrying inconvenience during field operation.
Utility model content
The utility model is to overcome at least one defect described in above-mentioned prior art, there is provided a kind of Portable novel CT poles
Property tester, the instrument can be tested the polarity of threephase current transformer simultaneously, can also the independent phase of a phase one test, with
Traditional dry cell method is compared, and greatly shortens the time of test, so as to improve operating efficiency.And simple in construction, carrying makes
With conveniently；Transformer station it is newly-built, enlarging and overhaul technology innovation project in carry out CT polarity tests when, can be sensitiveer, significantly improve
Testing efficiency.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of Portable novel CT polarity testers, including testing cassete, it is characterised in that described testing cassete includes relay
Device, hand push button, power switch, automatic/hand switch, the first normal on/off switch, trigger switch, the first normal on/off switch,
Power supply, CT first winding interfaces；
Pulse trigger sj1, pulse trigger sj2, pulse trigger sj3 are in parallel and switch connection with automatic/hand；The
One normal on/off switch sj-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-1 is in parallel and is pressed with auto-manual
Button, power switch connection；First normal on/off switch sj1-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-
1 is connected with relay zj1, relay zj2, relay zj3 respectively；Trigger switch SB1 connects with relay zj1, relay zj2
Connect, trigger switch SB2 connects to be connected with relay zj2, relay zj3；Hand push button input terminates at the hand of automatic/hand switch
Mobile interface, output end are connected with the first normal on/off switch output end respectively；Second normal on/off switch zj1-1, second often it is opening/closing
Switch zj2-1, the second normal on/off switch zj3-1 is in parallel and is connected with positive source and power switch, and power cathode meets CT once
Around group interface output end.
Power supply uses 12V batteries, and power supply is connected with current-limiting resistance, prevents that electric current is excessive, adds current limliting electricity in the loop
Hinder to limit size of current；Power supply is in parallel with charger and is provided with charging indicator light so that the tester can be without external
Work under power supply, when accumulator electric-quantity deficiency, it can be charged by charger, observed and charged by charging indicator light
Situation.
CT first windings interface is connected with 100uA microampere indicator type current meters, by observing ammeter positively biased or reverse-biased
Judge CT polar orientation.
Compared with prior art, beneficial effect is：
1. the instrument can test single-phase or multiphase CT polarity simultaneously as needed, asking for three-phase can not be surveyed simultaneously by solving
Topic, greatly increases operating efficiency；
2. voluntarily can be charged during accumulator electric-quantity deficiency by charger, the problem of frequently changing dry cell is improved；
3. tester is easy to carry, simple to operate, equivalent to one portable tool box.
Brief description of the drawings
Fig. 1 is the utility model integrated circuit schematic diagram；
Fig. 2 is the structural representation of indicator type current meter；
Embodiment
Accompanying drawing being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent；It is attached in order to more preferably illustrate the present embodiment
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product；To those skilled in the art,
Some known features and its explanation may be omitted and will be understood by accompanying drawing.Being given for example only property of position relationship described in accompanying drawing
Explanation, it is impossible to be interpreted as the limitation to this patent.
As shown in Figure 1, 2, a kind of Portable novel CT polarity testers, including testing cassete, testing cassete include relay, hand
Dynamic button, power switch, automatic/hand switch, the first normal on/off switch, trigger switch, the first normal on/off switch, power supply,
CT first winding interfaces；
Pulse trigger sj1, pulse trigger sj2, pulse trigger sj3 are in parallel and switch connection with automatic/hand；The
One normal on/off switch sj-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-1 is in parallel and is pressed with auto-manual
Button, power switch connection；First normal on/off switch sj1-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-
1 is connected with relay zj1, relay zj2, relay zj3 respectively；Trigger switch SB1 connects with relay zj1, relay zj2
Connect, trigger switch SB2 connects to be connected with relay zj2, relay zj3；Hand push button input terminates at the hand of automatic/hand switch
Mobile interface, output end are connected with the first normal on/off switch output end respectively；Second normal on/off switch zj1-1, second often it is opening/closing
Switch zj2-1, the second normal on/off switch zj3-1 is in parallel and is connected with positive source and power switch, and power cathode meets CT once
Around group interface output end.
Power supply uses 12V batteries, and power supply is connected with current-limiting resistance, prevents that electric current is excessive, adds current limliting electricity in the loop
Hinder to limit size of current；Power supply is in parallel with charger and is provided with charging indicator light so that the tester can be without external
Work under power supply, when accumulator electric-quantity deficiency, it can be charged by charger, observed and charged by charging indicator light
Situation.
CT first windings interface is connected with 100uA microampere indicator type current meters, by observing ammeter positively biased or reverse-biased
Judge CT polar orientation.
When carrying out automatic three-phase CT polarity tests using this tester, first by the interface on instrument CT first winding interfaces
A1, interface a2 are connected to the A phase first windings both ends on the interface of CT secondary windings, and interface b1, interface b2 meet B phase CT, interface c1,
Interface c2 meets C phases CT.Again by the interface of CT secondary windings A phase secondary windings both ends access indicator type current meter A interfaces,
N interfaces, B phase CT secondary sides two terminate B interface, N interfaces, and C phase CT secondary sides two terminate C interface, N interfaces.Automatic/hand is turned
Change switch and be threaded to automated location, press power switch and connect 12V power supplys, pulse trigger sj1, pulse trigger sj2, pulse are touched
Device sj3 conductings are sent out, the first normal on/off switch sj1-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-1 are closed
Close, relay zj1, relay zj2, relay zj3 loops are connected, the second normal on/off switch zj1-1, the second normal on/off switch
Zj2-1, the second normal on/off switch zj3-1 closures, A, B, C three-phase CT first windings have electric current to flow through, finally by observation electricity
Flow table positively biased or the reverse-biased polar orientation for judging CT.
Manual measurement CT polarity chrons are carried out, by automatic/manual switch to manual position, press power switch, manually
By hand push button to connect loop, when trigger switch SB1 is pressed, two-phase can be surveyed manually, while is pressed trigger switch SB1, touched
During hair switch SB2, three-phase can be surveyed.Similarly finally by observation ammeter positively biased or the reverse-biased polar orientation for judging CT.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.All made within spirit of the present utility model and principle all any modification, equivalent and improvement etc., should be included in
In the protection domain of the utility model claims.
Claims (7)
1. a kind of Portable novel CT polarity testers, including testing cassete, it is characterised in that described testing cassete includes relay
Device, hand push button, power switch, automatic/hand switch, the first normal on/off switch, trigger switch, the first normal on/off switch,
Power supply, CT first winding interfaces；
Pulse trigger sj1, pulse trigger sj2, pulse trigger sj3 are in parallel and switch connection with automatic/hand；First is normal
On/off switch sj1-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-1 it is in parallel and with auto-manual button,
Power switch connects；First normal on/off switch sj1-1, the first normal on/off switch sj2-1, the first normal on/off switch sj3-1 point
It is not connected with relay zj1, relay zj2, relay zj3；Trigger switch SB1 is connected with relay zj1, relay zj2, is touched
Hair switch SB2 connects to be connected with relay zj2, relay zj3；Hand push button input terminates at connecing manually for automatic/hand switch
Mouthful, output end is connected with the first normal on/off switch output end respectively；Second normal on/off switch zj1-1, the second normal on/off switch
Zj2-1, the second normal on/off switch zj3-1 is in parallel and is connected with positive source and power switch, and power cathode connects CT first windings
Interface output end.
2. a kind of Portable novel CT polarity testers according to claim 1, it is characterised in that described power supply is
12V batteries.
3. a kind of Portable novel CT polarity testers according to claim 2, it is characterised in that described power supply and limit
Leakage resistance is connected.
4. a kind of Portable novel CT polarity testers according to claim 3, it is characterised in that described power supply is with filling
Electrical equipment is in parallel and is provided with charging indicator light.
A kind of 5. Portable novel CT polarity testers according to claim 1, it is characterised in that the CT first windings
Interface is connected with ammeter.
A kind of 6. Portable novel CT polarity testers according to claim 5, it is characterised in that described ammeter amount
Journey is 100uA.
A kind of 7. Portable novel CT polarity testers according to claim 5 or 6, it is characterised in that described electric current
Table is microampere indicator type current meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720951487.0U CN207067314U (en) | 2017-08-01 | 2017-08-01 | A kind of Portable novel CT polarity testers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720951487.0U CN207067314U (en) | 2017-08-01 | 2017-08-01 | A kind of Portable novel CT polarity testers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207067314U true CN207067314U (en) | 2018-03-02 |
Family
ID=61517064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720951487.0U Active CN207067314U (en) | 2017-08-01 | 2017-08-01 | A kind of Portable novel CT polarity testers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207067314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764042A (en) * | 2019-12-03 | 2020-02-07 | 天津送变电工程有限公司 | Polarity tester for secondary circuit of remote multifunctional mutual inductor |
-
2017
- 2017-08-01 CN CN201720951487.0U patent/CN207067314U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764042A (en) * | 2019-12-03 | 2020-02-07 | 天津送变电工程有限公司 | Polarity tester for secondary circuit of remote multifunctional mutual inductor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101477150B (en) | Method for implementing fast measurement of inductive winding DC resistance by using constant voltage source | |
| CN203502540U (en) | Current transformer polarity tester | |
| CN202939257U (en) | Hand-held three-phase polarity tester | |
| CN103063895B (en) | Pliers-shaped anti-interference current transformer and transformer iron core grounding current testing system | |
| CN107677915A (en) | Use mutual inductor polarity measurement apparatus and its measuring method in Portable metering scene | |
| CN110058188A (en) | The active detector of electric energy metering device | |
| Yan et al. | Research on measurement technology of transformer no-load loss based on Internet of Things | |
| CN207067314U (en) | A kind of Portable novel CT polarity testers | |
| CN202421409U (en) | Portable polarity tester for mutual inductors | |
| CN209432939U (en) | A kind of high-power transformer second protection polarity test device | |
| CN205643677U (en) | Hand -held type current transformer voltage -current characteristic tester | |
| CN209606500U (en) | A kind of high side current pincers | |
| CN204832398U (en) | Current transformer secondary wiring detection device that take a percentage more | |
| CN103543364B (en) | A kind of wind generating set pitch control charger detection platform | |
| CN207396707U (en) | 110kV current transformer integrated form polarity test devices | |
| CN206638714U (en) | Situ metrology check device | |
| CN102043085A (en) | Ultrahigh voltage power grid and current on-load detector | |
| CN104849532A (en) | Precise current sensor | |
| CN108776320A (en) | A kind of no-load voltage ratio of current transformer, Check up polarity test method and device | |
| CN213302497U (en) | Current transformer secondary side loop detection device and circuit | |
| CN203433013U (en) | Portable electric energy metering terminal experiment power supply | |
| CN203405527U (en) | Portable rechargeable DC voltage boosting device | |
| CN203324465U (en) | Device using voltage method to measure ratio of transformation of current transformer | |
| CN203949963U (en) | A kind of two pincers digit phase volt ampere meter | |
| CN202939258U (en) | Current transformer polarity test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |