CN207281271U - A kind of secondary through-flow instrument of portable type current transformer - Google Patents
A kind of secondary through-flow instrument of portable type current transformer Download PDFInfo
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- CN207281271U CN207281271U CN201721351429.0U CN201721351429U CN207281271U CN 207281271 U CN207281271 U CN 207281271U CN 201721351429 U CN201721351429 U CN 201721351429U CN 207281271 U CN207281271 U CN 207281271U
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- inverter
- current transformer
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- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of secondary through-flow instrument of portable type current transformer, including central controller, three-phase adjustable constant-flow inverter, man-machine interaction unit, electric current secondary loop break alarm module and storage battery, the central controller receives the man-machine interaction unit information, and control the output of the three-phase adjustable current inverter, the output of the three-phase adjustable current inverter is connected with the current loop break alarm module, it is whether normal for tested current loop, the man-machine interaction unit, the central controller and the three-phase adjustable current inverter are electrically connected with storage battery respectively.The utility model can independently export three-phase current with split-phase, improve operating efficiency；Utilize accumulators store electric energy, it is not necessary to seek extra AC power case in operation field, therefore adapt to non-transformer place operation；Possess broken string alarm function, electric current secondary loop broken string risk can be excluded with monitoring current secondary circuit state.
Description
Technical field
It the utility model is related to the secondary technical field of electric power electric, and in particular to a kind of portable type current transformer is secondary logical
Flow instrument.
Background technology
Current transformer is not replaced in power equipment operation, its secondary winding is used to protect, encourage
Magnetic, monitoring, measurement, metering, fault recording system, the real operation conditions for recording primary equipment, and protection primary equipment
Safe operation, but the correctness of secondary circuit polarity, phase, amplitude directly affects the normal operation of equipment, and slightly mistake will
Cause false protection, metering to be not allowed, the inaccuracy of monitoring measurement, directly affect normal boot-strap and operation, the measurement of generating set
Deng there is also the danger that causes primary equipment scaling loss due to open circuit of secondary loop of current transformer or producing high-voltage electricity the person made
Into danger.
Traditional secondary through-flow test, which mainly utilizes, protects the analog output function of tester to complete, secondary in progress
Need bulky protection tester being transported to battery limits use during through-flow test.When need to carry out through-flow equipment it is more when,
This test method is less efficient, while is also easily damaged protection tester.In addition, secondary through-flow test is carried out to altitude plant
When, it is necessary to which bulky tester is carried in eminence virtually added job safety risk.
Utility model content
The purpose of this utility model is to provide a kind of secondary through-flow instrument of portable type current transformer, to improve Current Mutual Inductance
The efficiency and security of the secondary through-flow test of device.
The utility model is achieved through the following technical solutions：
A kind of secondary through-flow instrument of portable type current transformer, including it is central controller, three-phase adjustable constant-flow inverter, man-machine
Interactive unit, electric current secondary loop break alarm module and storage battery, the central controller receive the man-machine interaction unit
Information, and the output of the three-phase adjustable current inverter is controlled, output and the electricity of the three-phase adjustable current inverter
Flow back to road break alarm module to be connected, the man-machine interaction unit, the center control whether normal for tested current loop
Device processed and the three-phase adjustable current inverter are electrically connected with storage battery respectively.
Further, the central controller uses DSP5402 digital processing units.
Further, the man-machine interaction unit includes the charactron of display output size of current, sets output current big
Small knob and the indicator light of display working condition.
Further, the three-phase adjustable constant-flow inverter output current split-phase is adjustable, and output accuracy reaches 1%.
Further, the electric current secondary loop break alarm module includes analog-to-digital conversion module, microcontroller, Current Mutual Inductance
Device and buzzer, the analog signal of the current transformer become digital signal by analog-to-digital conversion module and pass to microcontroller,
For judging that current loop breaks, when output current is less than 0.01A, microcontroller control buzzer warning.
Further, storage battery output 12V DC voltage, and can continuous firing 3 it is small when more than.
The utility model has the advantages that：
1st, three-phase current can be independently exported with split-phase, improves operating efficiency；
2nd, accumulators store electric energy is utilized, it is not necessary to seek extra AC power case in operation field, therefore adapt to nothing
The operation of power supply place；
3rd, possess broken string alarm function, electric current secondary loop broken string risk can be excluded with monitoring current secondary circuit state.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the utility model man-machine interaction unit structure diagram；
Fig. 3 is the structure diagram of the utility model electric current secondary loop break alarm module；
Reference numeral implication in figure：1st, shell, 2, storage battery, 3, man-machine interaction unit, 4, central controller, 5, three-phase can
Adjust constant current inverter, 6, electric current secondary loop break alarm module, 7, charactron, 8, status indicator lamp, 9, knob, 10, buzzing
Device, 11, analog-to-digital conversion module, 12, microcontroller, 13, current transformer.
Embodiment
Embodiment
As shown in Figure 1, Figure 2 and Fig. 3, a kind of secondary through-flow instrument of portable type current transformer, it is characterised in that including shell 1, in
Entreat controller 4, three-phase adjustable constant-flow inverter 5, man-machine interaction unit 3, electric current secondary loop break alarm module 6 and storage battery
2, the central controller 4 receives 3 information of man-machine interaction unit, and controls the defeated of the three-phase adjustable current inverter 5
Go out, the output of the three-phase adjustable current inverter 5 is connected with the current loop break alarm module 6, for testing electricity
Whether normal flow back to road, the man-machine interaction unit 3, the central controller 4 and the three-phase adjustable current inverter 5 are distinguished
It is electrically connected with storage battery 2.
Wherein, the central controller 4 uses DSP5402 digital processing units.The man-machine interaction unit 3 includes showing defeated
Go out the charactron 7 of size of current, its display precision reaches 0.001A, the knob 9 for setting output current size and display work shape
The indicator light 8 of state.The 5 output current split-phase of three-phase adjustable constant-flow inverter is adjustable, and output accuracy reaches 1%.The electric current
Secondary circuit break alarm module 6 includes analog-to-digital conversion module 11, microcontroller 12, current transformer 13 and buzzer 10, described
The analog signal of current transformer 13 becomes digital signal by analog-to-digital conversion module and passes to microcontroller 12, for judging electric current
Circuit breaking, when output current is less than 0.01A, the microcontroller 12 controls buzzer 10 to alarm.The storage battery 2 exports
12V DC voltage, and can continuous firing 3 it is small when more than.
Above-listed detailed description is illustrating for the utility model possible embodiments, which simultaneously is not used to limit
The scope of the claims of the utility model, all equivalence enforcements or change without departing from carried out by the utility model, are intended to be limited solely by this case
In the scope of the claims.
Claims (6)
1. a kind of secondary through-flow instrument of portable type current transformer, it is characterised in that inverse including central controller, three-phase adjustable constant-flow
Become device, man-machine interaction unit, electric current secondary loop break alarm module and storage battery, the central controller receives described man-machine
Interactive unit information, and the output of the three-phase adjustable current inverter is controlled, the output of the three-phase adjustable current inverter
It is connected with the electric current secondary loop break alarm module, the human-computer interaction list whether normal for tested current loop
First, described central controller and the three-phase adjustable current inverter are electrically connected with storage battery respectively.
2. the secondary through-flow instrument of portable type current transformer according to claim 1, it is characterised in that the central controller
Using DSP5402 digital processing units.
3. the secondary through-flow instrument of portable type current transformer according to claim 1, it is characterised in that the human-computer interaction list
Member includes the charactron of display output size of current, sets the knob of output current size and the indicator light of display working condition.
4. the secondary through-flow instrument of portable type current transformer according to claim 1, it is characterised in that the adjustable perseverance of three-phase
Stream inverter output current split-phase is adjustable, and output accuracy reaches 1%.
5. the secondary through-flow instrument of portable type current transformer according to claim 1, it is characterised in that the electric current secondary returning
Road break alarm module includes analog-to-digital conversion module, microcontroller, current transformer and buzzer, the simulation of the current transformer
Signal becomes digital signal by the analog-to-digital conversion module and passes to the microcontroller, for judging that current loop breaks, when
When output current is less than 0.01A, the microcontroller controls the buzzer warning.
6. the secondary through-flow instrument of portable type current transformer according to claim 1, it is characterised in that the storage battery output
12V DC voltage, and can continuous firing 3 it is small when more than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721351429.0U CN207281271U (en) | 2017-10-19 | 2017-10-19 | A kind of secondary through-flow instrument of portable type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721351429.0U CN207281271U (en) | 2017-10-19 | 2017-10-19 | A kind of secondary through-flow instrument of portable type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207281271U true CN207281271U (en) | 2018-04-27 |
Family
ID=61980982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721351429.0U Active CN207281271U (en) | 2017-10-19 | 2017-10-19 | A kind of secondary through-flow instrument of portable type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207281271U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406907A (en) * | 2018-12-09 | 2019-03-01 | 国网辽宁省电力有限公司锦州供电公司 | High-impedance transformer simulates on-load through-flow test device and test method |
| CN110488137A (en) * | 2019-09-03 | 2019-11-22 | 广东电网有限责任公司 | A kind of apparatus and method detecting CT secondary circuit integrality |
-
2017
- 2017-10-19 CN CN201721351429.0U patent/CN207281271U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406907A (en) * | 2018-12-09 | 2019-03-01 | 国网辽宁省电力有限公司锦州供电公司 | High-impedance transformer simulates on-load through-flow test device and test method |
| CN110488137A (en) * | 2019-09-03 | 2019-11-22 | 广东电网有限责任公司 | A kind of apparatus and method detecting CT secondary circuit integrality |
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