CN206945881U - Novel current transformer polarity tester - Google Patents
Novel current transformer polarity tester Download PDFInfo
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- CN206945881U CN206945881U CN201720562835.5U CN201720562835U CN206945881U CN 206945881 U CN206945881 U CN 206945881U CN 201720562835 U CN201720562835 U CN 201720562835U CN 206945881 U CN206945881 U CN 206945881U
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Abstract
A kind of novel current transformer polarity tester, including shell and the electric power loop being arranged in shell, manual test loop, automatic test loop and sound alarm circuit, also include the guidance panel for being arranged at case surface, the guidance panel is provided with master switch, manual/auto change-over switch, milliammeter display window, electricity display window, current limliting adjusting knob and manual test button, and transformer primary side binding post is integrated on guidance panel with transformer secondary side binding post.Using this novel current transformer polarity tester, maintainer's maloperation or device defect, which can be greatly decreased, causes the situation of test result mistake to occur, the accuracy of polarity test can also effectively be improved, improve the efficiency of polarity test, so as to reduce the time of transformer test, the time of power failure is reduced, can be in a manner of the test of convenient switch polarity automatic/manual switch, the reliability of polarity test is lifted, is advantageous to its popularization and promotes.
Description
Technical field
Electrical equipment technical field is the utility model is related to, more specifically to a kind of current transformer polarity testing
Instrument.
Background technology
Current transformer is the important component of power system, and it is widely used in relay protection, electric energy metrical, remote measurement
Monitoring, failure wave-recording etc..The polarity of current transformer is one of its important parameter, connection relay protection (it is such as differential,
Directional power protection etc.) device, electric energy meter timing, it must be noted that the polarity of current transformer.The connection of polarized is correct, protects
Protection unit and instrument could be acted correctly；Otherwise meter can be caused to show mistake, or even the situation of false protection occur, therefore electricity
Current transformer must carry out polarity test before and after handing-over and overhaul.
Estimated current mutual inductor polarity is tested and typically all uses direct current method, and its flow is as follows：At least done with two people
Experiment, a people take dry cell, battery plus-negative plate are connected to the both ends of current transformer primary side；Another person connects by milliammeter
The secondary side of current transformer winding, observe the throw of pointer situation of milliammeter.Certainly also there are many functions strong on the market now
Big C-V characteristic test device, but these devices generally have many functions, and the polarity test of current transformer is wherein
One.
Two people are at least needed to complete test job when being tested using direct current method, personnel's redundancy is less efficient；Test is adopted
With dry cell, capacity is small and can not intuitively observe the dump energy of battery；Test process needs manual ON/disconnection battery, holds
Easily there is battery loose contact or both positive and negative polarity is reversed waits maloperation, cause result of the test mistake, increase testing time；Test process
In communication between two people mainly by calling out or intercom is completed, easily disturbed by site environment noise, cause test anti-
Multiple to carry out, testing efficiency is low.If mostly all bulky because apparatus function is more using existing C-V characteristic test device,
Weight weight, not portable, complex operation, higher is required to field condition, the ground for only needing test current transformer polarity
Side, this is obviously very inconvenient.
Therefore, existing current transformer polarity testing method is purely manual operation, easily occur battery loose contact or
Both positive and negative polarity is reversed to wait maloperation, causes test result inaccurate, need to test repeatedly；Need simultaneously when testing by lifting up one's voice or
Intercom is completed, and is easily influenceed by working site noise, the shortcomings of testing efficiency is low be present.
The content of the invention
For above-mentioned prior art, the technical problems to be solved in the utility model be a kind of polarity test degree of accuracy it is high,
Testing efficiency is high, small instrument for testing polarity of current transformer is disturbed by site environment.
In order to solve the above technical problems, the utility model provides a kind of novel current transformer polarity tester, including
Shell and the electric power loop being arranged in shell, manual test loop, automatic test loop and sound alarm circuit, in addition to set
The guidance panel of case surface is placed in,
The guidance panel is provided with master switch, manual/auto change-over switch, milliammeter display window, electricity display window
Mouth, current limliting adjusting knob and manual test button, transformer primary side binding post are integrated in transformer secondary side binding post
On guidance panel；
The electric power loop includes：Battery, master switch, electric-quantity display device and DC/DC modules, when master switch closes, electricity
Pond powers for transformer primary side, and be converted to 5V by DC/DC modules powers for single-chip microcomputer, and electric-quantity display device is used for showing that battery remains
Remaining electricity；
The manual test loop includes：The K1 nodes of change-over switch, manual test button, transformer primary side binding post and
Current-limiting resistance, after the K1 nodes closure of change-over switch, manual test loop is come into force, and manually the A1 nodes of testing button come
The connection of transformer primary side and electric power loop is turned on/off, manually the A2 nodes on/off audible alarm of testing button
Loop；Current-limiting resistance is an adjustable resistance, by the current limliting adjusting knob on rotation process panel, can limit transformer original
The electric current of side test loop, prevent the excessive damage mutual inductor coil of electric current；
The automatic test loop includes：The K2 nodes of change-over switch, single-chip microcomputer, relay and its auxiliary node J1, J2,
When the K2 nodes closure of change-over switch, automatic test loop comes into force, by according to the program write after microcontroller power supply connection
2S0-5V square wave occurs, so as to drive relay, is switched on or switched off relay；Its auxiliary node when relay is connected
J1, J2 are closed, and J1 nodes connect transformer primary side and carry out polarity test with electric power loop, and node J2 connects audible alarm loop and entered
Row audible alarm；
The audible alarm loop includes：The A2 nodes of manual test button, the J2 nodes of relay, buzzer I, buzzing
Device II and FM microphone module, audible alarm loop includes automatic test audible alarm loop and manual test audible alarm returns
Road, when device is operated in automatic mode, J2 nodes drive closure by single-chip microcomputer automatically, so as to connect buzzer II, then lead to
FM microphone modules are crossed to quiet down and then retransmit away；When device is operated in manual mode, A2 nodes, which are manually tested, to be pressed
Button manual ON, so as to connect buzzer I, then by FM microphone modules quiet down and then retransmit away.
Preferably, the battery is 12V lithium batteries, in addition to is used for filling to 12V lithium cell chargings on shell
Electrical interface.
Preferably, in addition to FM antennas, the FM antennas are used for the antenna of FM microphone modules is external, are easy to FM signals
Transmitting.
Preferably, the shell uses aluminum hull structure.
Preferably, the shell is provided with handle.
Beneficial effect：
The utility model has compared following several big advantages with existing transformer test method, apparatus：
(1) for the battery that conventional method uses for 1.5V dry cell, battery capacity is small, and can not intuitively see battery
Electricity, cause sometimes to take to the battery at scene without electricity, situation about can not use occur.Tested using the new transformer
After instrument, lithium battery capacity is big, chargeable, and devises powered show circuit, and electricity can be intuitively observed by electric-quantity display device
The electricity in pond, avoid the occurrence of situation about can not use at the scene.
(2) easily there is battery loose contact or both positive and negative polarity is reversed using manual ON/disconnection battery in conventional method
Deng maloperation, result of the test mistake is caused, increases testing time.The new transformer tester is devised automatically using single-chip microcomputer
Polarity test loop, by programming realization turn on automatically/disconnection battery and transformer primary side loop, so as to realize mutual inductor polarity
Automatic test, avoid the multi-pass operation of conventional method, improve the accuracy rate and testing efficiency of test result.
(3) conventional apparatus alarm free function, it can only be called out when mutual inductor polarity is tested by personnel or intercom exchanges
It just can determine that whether battery is connected, at the scene that environment is noisy or transformer primary side is apart from each other with secondary side terminal box by week
The influence of collarette border is very big, easily causes the situation of communication confusing communication, so as to want repeated multiple times test, adds maintainer
Working strength, reduce operating efficiency.New equipment adds audible alarm loop, and buzzer sounding is triggered when battery is connected,
Sound is sent by FM transmitter modules again, radio receives well within 3KM, especially suitable for it is noisy scene and
Transformer primary side and secondary side terminal box scene apart from each other.
(4) when using conventional polar method of testing, no matter transformer primary side and the distance of secondary side terminal box distance, all
At least two people are needed to complete polarity test, wherein a people beats polarity in transformer primary side with battery, another person is mutual
Sensor secondary side terminal box measures the positive and negative of polarity.New polarity tester employs the design of integration, by transformer primary side
Primary side polarity test loop integrates with transformer secondary secondary side measuring loop, in transformer primary side and secondary side
When terminal box is closer to the distance, single polarity test can be completed, reduce number of work, improve operating efficiency.
In summary, this novel current transformer polarity tester, maintainer's maloperation or device can be greatly decreased
Defect causes the situation of test result mistake to occur, and can also effectively improve the accuracy of polarity test, improves polarity test
Efficiency, so as to reduce the time of transformer test, reduce the time of power failure, be advantageous to its popularization and promote.In addition, by turning
Change switch designs automatic/hand polarity test switching circuit, in that context it may be convenient to the mode of switch polarity test, testing automatically
The relatively low occasion of reliability can switch to manual mode, lift the reliability of polarity test.
Brief description of the drawings
Fig. 1 is the circuit diagram of novel current transformer polarity tester of the present utility model；
Fig. 2 is novel current transformer polarity tester guidance panel schematic diagram of the present utility model.
In figure：1- master switch, 2- change-over switches, 3- milliammeter display windows, 4- electricity display windows, the regulation rotation of 5- current limlitings
Button, 6- manual test buttons, 7- transformer primary side binding posts, 8- transformer secondary side binding posts, 9- charging inlets, 10-FM
Antenna, 11- handles
Embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings：
As shown in Figures 1 and 2, novel current transformer polarity tester of the present utility model, including shell and be arranged at
Electric power loop, manual test loop, automatic test loop and sound alarm circuit in shell, in addition to it is arranged at case surface
Guidance panel,
The guidance panel is provided with master switch 1, manual/auto change-over switch 2, milliammeter display window 3, electricity and shown
Window 4, current limliting adjusting knob 5 and manual test button 6, transformer primary side binding post 7 and transformer secondary side binding post 8
It is integrated on guidance panel；
The electric power loop includes：Battery, master switch 1, electric-quantity display device and DC/DC modules, when master switch 1 closes,
Battery is powered for transformer primary side, and be converted to 5V by DC/DC modules powers for single-chip microcomputer, and electric-quantity display device is used for showing battery
Dump energy；
The manual test loop includes：K1 nodes, manual test button 6, the transformer primary side binding post of change-over switch 2
And current-limiting resistance, after the K1 nodes closure of change-over switch 2, manual test loop is come into force, manually the A1 sections of testing button 6
Put to turn on/off the connection of transformer primary side and electric power loop, manually the A2 node on/off sound of testing button 6
Sound alarm circuit；Current-limiting resistance is an adjustable resistance, by the current limliting adjusting knob 5 on rotation process panel, can be limited
The electric current of transformer primary side test loop, prevent the excessive damage mutual inductor coil of electric current；
The automatic test loop includes：K2 nodes, single-chip microcomputer, relay and its auxiliary node J1 of change-over switch 2,
J2, when the K2 nodes closure of change-over switch 2, automatic test loop comes into force, microcontroller power supply connect after by according to being write
2S0-5V square wave occurs for program, so as to drive relay, is switched on or switched off relay；Its auxiliary section when relay is connected
Point J1, J2 are closed, and J1 nodes connect transformer primary side and carry out polarity test with electric power loop, and node J2 connects audible alarm loop
Carry out audible alarm；
The audible alarm loop includes：The A2 nodes of manual test button 6, the J2 nodes of relay, buzzer I, honeybee
Ring device II and FM microphone module, and audible alarm loop includes automatic test audible alarm loop and manual test audible alarm returns
Road, when device is operated in automatic mode, J2 nodes drive closure by single-chip microcomputer automatically, so as to connect buzzer II, then lead to
FM microphone modules are crossed to quiet down and then retransmit away；When device is operated in manual mode, A2 nodes, which are manually tested, to be pressed
The manual ON of button 6, so as to connect buzzer I, then by FM microphone modules quiet down and then retransmit away.
The battery is 12V lithium batteries, in addition to the charging inlet 9 being used for 12V lithium cell chargings on shell.
Also include FM antennas 10, the FM antennas 10 are used for the antenna of FM microphone modules is external, are easy to FM signals to send out
Penetrate.
The shell uses aluminum hull structure.
The shell is provided with handle 11.
Operation principle of the present utility model is：When master switch 1 closes, 12V lithium batteries are powered for transformer primary side, are passed through
The switch polarity test mode of automatic/manual switch 2, when the K1 nodes closure of change-over switch 2, connect manual polarity test
Loop, manually it can realize manual test by testing button 6；When the K2 junction closures of change-over switch 2, it is electromechanical to connect monolithic
Source, realize automatic test.
Specifically, after the K1 nodes closure of change-over switch 2, manual test loop comes into force, manually testing button
A1 nodes turn on/off the connection of electric power loop and transformer primary side, A2 nodes on/off audible alarm loop.When turn
When changing the K2 nodes closure of switch 2,5V is converted to by DC/DC modules and powered for single-chip microcomputer, SCM program sends 2S automatically
The square-wave pulse of (0-5V), pulsed drive relay.When pulse output is 5V, relay is powered to make its auxiliary node J1, J2
Closure, J1 nodes connect transformer primary side and electric power loop, carry out polarity test, now milliammeter display window in observable Fig. 2
The deflection situation of milliampere list index in mouth 3, J2 nodes connect audible alarm loop and realize warning function；When pulse exports 0V,
J1, J2 node all disconnect, and now milliampere list index should be zeroed, so as to realize the polarity test of transformer.
Connected respectively in automatic test loop with manual test loop and accessed a buzzer, whether selection is automatic
Or manual test, when power on transformer primary side, audible alarm loop can be all turned on so as to send sound, then passes through FM
The sound that transmitter sends buzzer is launched, transformer secondary side survey crew by radio receive FM transmitting come
Buzzer sound, so as to judge the break-make of power supply, complete polarity test.
Above-mentioned combination accompanying drawing is explained in detail to embodiment of the present utility model, but the present invention be not limited to it is above-mentioned
Embodiment, in one skilled in the relevant art's possessed knowledge, many variations can also be made to it.
Claims (5)
1. a kind of novel current transformer polarity tester, it is characterised in that returned including shell and the power supply being arranged in shell
Road, manual test loop, automatic test loop and sound alarm circuit, in addition to the guidance panel of case surface is arranged at,
The guidance panel is provided with master switch, manual/auto change-over switch, milliammeter display window, electricity display window, limit
Adjusting knob and manual test button are flowed, transformer primary side binding post is integrated in operating surface with transformer secondary side binding post
On plate；
The electric power loop includes：Battery, master switch, electric-quantity display device and DC/DC modules, when master switch closes, battery is
Transformer primary side is powered, and be converted to 5V by DC/DC modules powers for single-chip microcomputer, and electric-quantity display device is used for showing remaining battery electricity
Amount；
The manual test loop includes：K1 nodes, manual test button, transformer primary side binding post and the current limliting of change-over switch
Resistance, after the K1 nodes closure of change-over switch, manual test loop is come into force, and manually the A1 nodes of testing button connect
On/off opens the connection of transformer primary side and electric power loop, and manually the A2 nodes on/off audible alarm of testing button returns
Road；Current-limiting resistance is an adjustable resistance, by the current limliting adjusting knob on rotation process panel, can limit transformer primary side
The electric current of test loop, prevent the excessive damage mutual inductor coil of electric current；
The automatic test loop includes：The K2 nodes of change-over switch, single-chip microcomputer, relay and its auxiliary node J1, J2, when turning
When changing the K2 nodes closure of switch, automatic test loop comes into force, and microcontroller power supply will occur after connecting according to the program write
2S 0-5V square wave, so as to drive relay, it is switched on or switched off relay；Its auxiliary node J1, J2 when relay is connected
Closure, J1 nodes connect transformer primary side and carry out polarity test with electric power loop, and node J2 connects audible alarm loop carry out sound
Sound is alarmed；
The audible alarm loop includes：The A2 nodes of manual test button, the J2 nodes of relay, buzzer I, buzzer II
And FM microphone modules, audible alarm loop include automatic test audible alarm loop and manual test audible alarm loop, when
When device is operated in automatic mode, J2 nodes drive closure by single-chip microcomputer automatically, so as to connect buzzer II, then pass through FM wheats
Gram wind module quiets down and then retransmited away；When device is operated in manual mode, manually testing button is manual for A2 nodes
Connect, so as to connect buzzer I, then by FM microphone modules quiet down and then retransmit away.
2. novel current transformer polarity tester according to claim 1, it is characterised in that the battery is 12V lithiums
Battery, in addition to the charging inlet being used for 12V lithium cell chargings on shell.
3. novel current transformer polarity tester according to claim 1, it is characterised in that also including FM antennas, institute
State FM antennas be used for by the antenna of FM microphone modules it is external, be easy to FM signals launch.
4. novel current transformer polarity tester according to claim 1, it is characterised in that the shell uses aluminum hull
Structure.
5. novel current transformer polarity tester according to claim 1, it is characterised in that the shell is provided with and carried
Hand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720562835.5U CN206945881U (en) | 2017-05-19 | 2017-05-19 | Novel current transformer polarity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720562835.5U CN206945881U (en) | 2017-05-19 | 2017-05-19 | Novel current transformer polarity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945881U true CN206945881U (en) | 2018-01-30 |
Family
ID=61361822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720562835.5U Expired - Fee Related CN206945881U (en) | 2017-05-19 | 2017-05-19 | Novel current transformer polarity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206945881U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633514A (en) * | 2018-12-29 | 2019-04-16 | 国网山东省电力公司淄博供电公司 | A kind of active defense formula electric power mutual-inductor polarity tester |
| CN111536864A (en) * | 2020-05-07 | 2020-08-14 | 郑州上电电机科技发展有限公司 | Central polarity correction circuit and portable correction instrument |
-
2017
- 2017-05-19 CN CN201720562835.5U patent/CN206945881U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633514A (en) * | 2018-12-29 | 2019-04-16 | 国网山东省电力公司淄博供电公司 | A kind of active defense formula electric power mutual-inductor polarity tester |
| CN109633514B (en) * | 2018-12-29 | 2021-04-06 | 国网山东省电力公司淄博供电公司 | Active protection type polarity tester for power transformer |
| CN111536864A (en) * | 2020-05-07 | 2020-08-14 | 郑州上电电机科技发展有限公司 | Central polarity correction circuit and portable correction instrument |
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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 |
Granted publication date: 20180130 Termination date: 20180519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |