CN206975160U - The easy device of differential protection loop polarity check and correction - Google Patents
The easy device of differential protection loop polarity check and correction Download PDFInfo
- Publication number
- CN206975160U CN206975160U CN201720872830.2U CN201720872830U CN206975160U CN 206975160 U CN206975160 U CN 206975160U CN 201720872830 U CN201720872830 U CN 201720872830U CN 206975160 U CN206975160 U CN 206975160U
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- China
- Prior art keywords
- correction
- differential protection
- connection post
- protection loop
- negative pole
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Abstract
The utility model discloses a kind of easy device of differential protection loop polarity check and correction, and it includes shell, and the shell is provided with control panel, and the control panel is provided with volt ampere meter, primary connection post, secondary connection post, test button；The volt ampere meter is connected to form primary Ioops with a dc source, the positive pole and negative pole of the primary connection post are connected with the positive pole and negative pole of the dc source respectively, and the positive pole and negative pole of the secondary connection post are connected respectively with the positive pole and negative pole of the ammeter of the volt ampere meter respectively；Test button is provided between the dc source and the primary connection post.The utility model can meet in the polarity check and correction operation of differential protection loop that frequency of use is high, saves the time, can carry with, save manpower, be easy to operation, cost is very low, the demand of service life length well.
Description
Technical field
A kind of electric power detection means is the utility model is related to, more particularly, to a kind of portable differential protection loop
The easy device of polarity check and correction.
Background technology
By the invention to differential protection loop polarity verifying unit, born with the existing detection 6 kV House-service System of my company
Exemplified by the polarity of the differential protection loop CT points of lotus cabinet.My company shares 4 units, and every unit 6kV system is divided to A, B two sections,
There are multiple load cabinets containing differential circuit on every section.When motor puts into differential protection and switches to power frequency operation mode, need
Differential circuit polarity check and correction is carried out, to ensure the correctness of primary connection, secondary connection, so as to ensure that motor possesses the bar that puts into operation
Part.Therefore, differential protection loop verifies often.But the existing differential protection loop polarity school for power system device
To equipment in there is it is larger the defects of, such as using electronic type polarity testing method, this method cost is high, and device uses the longevity
Order short；There is larger current to flow through device, easy burn-out electronic installation when testing differential protection loop.For another example surveyed using C-V characteristic
Instrument is tried, the Instrumentation Operating Areas is wide, and volume is larger, heavier-weight, it has not been convenient to carry and carry, the wiring of test polarity is complicated, and one
As in the case of carry out verification operation must 2-3 people cooperate to complete, wiring is complex, can not meet efficient detection
Job requirement.
Utility model content
The technical problem that the utility model solves is to provide a kind of easy device of differential protection loop polarity check and correction, improves
The efficiency of the check and correction operation of differential circuit polarity.
Technical solution of the present utility model is：
A kind of easy device of differential protection loop polarity check and correction, wherein, it includes shell, and the shell is provided with manipulation
Panel, the control panel are provided with volt ampere meter, primary connection post, secondary connection post, test button；The volt ampere meter with always
Stream power supply connects to form primary Ioops, the positive pole and negative pole of the primary connection post positive pole and negative pole with the dc source respectively
Connection, the positive pole and negative pole of the secondary connection post are connected respectively with the positive pole and negative pole of the ammeter of the volt ampere meter respectively；
Test button is provided between the dc source and the primary connection post.
The easy device of differential protection loop polarity check and correction as described above, wherein, the positive pole and negative pole of the volt ampere meter
Instrument detection switch is respectively equipped between the positive pole and negative pole of the dc source.
The easy device of differential protection loop polarity check and correction as described above, wherein, the instrument detection switch is synchronous
Linked switch.
The easy device of differential protection loop polarity check and correction as described above, wherein, the volt ampere meter be ± 50 μ A and ±
1 grade of volt ampere meter of 5V ranges.
The easy device of differential protection loop polarity check and correction as described above, wherein, the dc source is battery pack.
Learnt by described above, the utility model compared with prior art, can reach the effect of following really：
The easy device of differential protection loop polarity of the present utility model check and correction, using wiring it is simple, be convenient for carrying, conveniently
Operation, it can preferably complete task and improve operating efficiency.Due to easy structure of the present utility model, it can more meet difference
The frequency of use height of dynamic protective loop polarity check and correction operation, the time is saved, can be carried with, be saved manpower, be easy to operation, cost
Very low, service life length requirement.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the easy device of differential protection loop polarity of the present utility model check and correction.
Main element label declaration：
The utility model：
1：Volt ampere meter 2：Dc source 3：Test switch
4：Primary connection post 5：Secondary connection post 6：Instrument detection switch
Embodiment
In order to which the technical characteristics of the utility model, purpose and effect are more clearly understood, now control illustrates
Specific embodiment of the present utility model.
A kind of easy device of differential protection loop polarity check and correction of the present utility model, in its preferred embodiment, it please join
Read shown in Fig. 1, the easy device of differential protection loop polarity check and correction of the present utility model includes shell, and the shell is provided with behaviour
Panel is controlled, the control panel is provided with volt ampere meter 1, primary connection post 4, secondary connection post 5, test switch 3；The volt ampere meter
1 is connected to form primary Ioops with a dc source 2, the positive pole and negative pole of the primary connection post 4 respectively with the dc source 2
Positive pole connects with negative pole, the positive pole and negative pole of the secondary connection post 5 respectively with the positive pole of the ammeter of the volt ampere meter 1 and negative
Pole connects respectively；Test switch 3 is provided between the dc source 2 and the primary connection post 4.Differential guarantor of the present utility model
The easy device of loop polarity check and correction is protected, by accessing primary connection post 4, secondary connection post 5, presses test switch 3, it is now right
Side loop is that a side loop adds electric current, and on the left side, secondary side circuit checks pointer gauge deflection situation, to confirm Current Mutual Inductance
Device polarity.The polarity check and correction operation of differential protection loop by easy structure, can be realized whereby, improve operating efficiency.
The easy device of differential protection loop polarity check and correction of the present utility model as described above, its preferred embodiment
In, it is respectively equipped with instrument detection switch between the positive pole and negative pole of the volt ampere meter 1 and the positive pole and negative pole of the dc source 2
6.Instrument detection switch 6 is pressed, circuit intermediate loop is connected, and carries out self-test by volt ampere meter 1, whether test dc source 2 is electric
Amount is sufficient.In the case where testing electricity abundance, then press the check and correction operation that test switch 3 carries out differential circuit polarity.
The easy device of differential protection loop polarity check and correction of the present utility model as described above, its preferred embodiment
In, the instrument detection switch 6 is synchronous linked switch.Referring to shown in Fig. 1, the instrument detection switch 6 is synchro switch,
It can simultaneously connect and disconnect the circuit connection between volt ampere meter 1 and dc source 2.Only an instrument need to be set on control panel
Device detection button.
The easy device of differential protection loop polarity check and correction of the present utility model as described above, its preferred embodiment
In, the volt ampere meter 1 is 1 grade of volt ampere meter 1 of ± 50 μ A and ± 5V ranges.Meet the electricity in measuring instrument self dc source 2
Situation, while can also meet the requirement for measuring the polarity of differential protection loop.
The easy device of differential protection loop polarity check and correction of the present utility model as described above, its preferred embodiment
In, the dc source 2 is battery pack.The utility model in use, only need to change battery after certain time use
, without other heavy auxiliary devices.
The easy device of differential protection loop polarity check and correction of the present utility model, greatly facilitates 6 kV House-service System and bears
The differential protection loop current transformer polarity verification of lotus cabinet.By taking my company as an example, my company shares 4 units, every unit
6kV systems are divided to A, B two sections, there is multiple load cabinets containing differential circuit on every section.When motor puts into differential protection and switches to
, it is necessary to carry out differential circuit polarity check and correction during power frequency operation mode, to ensure the correctness of primary connection, secondary connection, so as to
Ensure that motor possesses the condition of putting into operation.Motor returns attaching line and finished after maintenance, and needs motor test more in evening hours,
Need to ensure that motor can should carry out CT point-polarities by bill after date, limited time, task is nervous, but night watch immediately with test run
Member is limited, can be unsatisfactory for that 2-3 people is simultaneously on the scene, therefore wiring is simple, is convenient for carrying, the job requirements of convenient operation, to completing
Task and raising operating efficiency are just even more important, and can be good at meeting the demand using the utility model.This reality
With new frequency of use it is high, save the time, can carry with, save manpower, easy to operation, cost is very low, service life length.
The schematical embodiment of the utility model is the foregoing is only, is not limited to model of the present utility model
Enclose.Any those skilled in the art, the made equivalent change on the premise of design of the present utility model and principle is not departed from
Change and change, the scope of the utility model protection all should be belonged to.
Claims (5)
1. a kind of easy device of differential protection loop polarity check and correction, it is characterised in that it includes shell, and the shell is provided with
Control panel, the control panel are provided with volt ampere meter, primary connection post, secondary connection post, test button；The volt ampere meter with
One dc source connects to form primary Ioops, the positive pole and negative pole of the primary connection post respectively with the positive pole of the dc source and
Negative pole connects, and the positive pole and negative pole of the positive pole and negative pole of the secondary connection post respectively with the ammeter of the volt ampere meter connect respectively
Connect；Test button is provided between the dc source and the primary connection post.
2. the easy device of differential protection loop polarity check and correction as claimed in claim 1, it is characterised in that the volt ampere meter
Instrument detection switch is respectively equipped between positive pole and negative pole and the positive pole and negative pole of the dc source.
3. the easy device of differential protection loop polarity check and correction as claimed in claim 2, it is characterised in that the instrument detection
Switch as synchronous linked switch.
4. the easy device of differential protection loop polarity as claimed in claim 3 check and correction, it is characterised in that the volt ampere meter is
± 50 μ A and ± 5V ranges 1 grade of volt ampere meter.
5. the easy device of differential protection loop polarity check and correction as claimed in claim 4, it is characterised in that the dc source
For battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720872830.2U CN206975160U (en) | 2017-07-18 | 2017-07-18 | The easy device of differential protection loop polarity check and correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720872830.2U CN206975160U (en) | 2017-07-18 | 2017-07-18 | The easy device of differential protection loop polarity check and correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206975160U true CN206975160U (en) | 2018-02-06 |
Family
ID=61403621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720872830.2U Expired - Fee Related CN206975160U (en) | 2017-07-18 | 2017-07-18 | The easy device of differential protection loop polarity check and correction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206975160U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120653A (en) * | 2019-04-30 | 2019-08-13 | 天津大学 | A kind of vertical traveling-wave differential protection method suitable for symmetrical bipolar DC link |
-
2017
- 2017-07-18 CN CN201720872830.2U patent/CN206975160U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120653A (en) * | 2019-04-30 | 2019-08-13 | 天津大学 | A kind of vertical traveling-wave differential protection method suitable for symmetrical bipolar DC link |
| CN110120653B (en) * | 2019-04-30 | 2021-03-23 | 天津大学 | Pilot traveling wave differential protection method suitable for symmetrical bipolar direct current line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20180718 |