CN209248005U - A kind of polarity detector for current transformer - Google Patents
A kind of polarity detector for current transformer Download PDFInfo
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- CN209248005U CN209248005U CN201821569225.9U CN201821569225U CN209248005U CN 209248005 U CN209248005 U CN 209248005U CN 201821569225 U CN201821569225 U CN 201821569225U CN 209248005 U CN209248005 U CN 209248005U
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- current transformer
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Abstract
The utility model provides a kind of polarity detector for current transformer, including direct current power box and polarity testing box, direct-flow input circuit is equipped in the direct current power box, the direct-flow input circuit is connected with current transformer first winding, polarity display circuit is equipped in the polarity testing box, the polarity display circuit is connected with secondary winding in current transformer, the direct current power box can provide the electric current by current transformer first winding, and the polarity testing box is able to achieve the long-range control to direct current power box.The utility model can realize quick detection polar to current transformer.
Description
Technical field
The utility model relates to power grid detection device technical field more particularly to a kind of polarity inspections for current transformer
Survey instrument.
Background technique
To the Check up polarity of current transformer, traditional method is to be powered using dry cell to current transformer primary circuit,
And mutual inductor secondary winding is measured using mechanical indicating pointer table, the polarity of mutual inductor is obtained by pointer gauge deflection situation
As a result.Above-mentioned detection method has the following disadvantages: (1) on-site current transformer secondary winding is or not the same place, therefore
Communication equipment is needed to link up when carrying out the work；(2) one secondary winding relevant device of current transformer needs not in the same place
Working member's no-float on both sides；(3) it in detection polarity process, due to negligence, is easy the positive and negative anodes table of polarity table
Pen is reversed, and then obtains opposite conclusion；(4) commutation thread replacing work amount is big in detection process, substantially reduces working efficiency, both consumed
When effort again, low efficiency and again cumbersome.
Utility model content
The purpose of this utility model is to provide a kind of polarity detectors for current transformer, to solve above-mentioned background
The problem of being proposed in technology.
The utility model is achieved through the following technical solutions: a kind of polarity detector for current transformer, packet
Include direct current power box and polarity testing box, be equipped with direct-flow input circuit in the direct current power box, the direct-flow input circuit with
Current transformer first winding is connected, and polarity display circuit, the polarity display circuit and electricity are equipped in the polarity testing box
Current transformer secondary winding is connected, and the direct current power box can provide the electric current by current transformer first winding, the pole
Property test box is able to achieve the long-range control to direct current power box.
Preferably, the direct-flow input circuit includes that several first connect with current transformer first winding input terminal connect
Terminal, several the second binding posts being connect with current transformer first winding output end, several indicator lights, battery, adjustable electric
Resistance, the positive and negative switching switch of direct current and master switch, the battery is connected with master switch, adjustable resistance, the first binding post, described
First binding post is electrically connected with current transformer first winding, the positive and negative switching switch of direct current and the adjustable resistance, electric power storage
Pond is in parallel, is additionally provided with wireless receiving module in the direct current power box, the wireless receiving module can control master switch unlatching/pass
It closes.
Preferably, the direct current power box is equipped with power interface, and the battery is charged by power interface.
Preferably, the polarity display circuit includes and several thirds connecting with secondary winding in current transformer input terminal
Binding post, several the 4th binding posts being connect with secondary winding in current transformer input terminal, operational amplifier, A/D analog-to-digital conversion
Device, controller, remote control switch, high-definition display screen, wireless sending module, second binding post and operational amplifier, A/D modulus
Converter, controller are successively electrical connected, and the controller is connected with high-definition display screen signal.
Preferably, first binding post, the second binding post are set in the first terminal box, the third binding post, the 4th
Binding post is set in the second terminal box, and the first binding post is connected with A, B, C of current transformer first winding respectively, described
Second binding post is connect with the N-terminal of current transformer first winding respectively, the third binding post respectively with current transformer two
A, B, C of secondary winding are connected, and the 4th binding post is connect with the N-terminal of secondary winding in current transformer respectively.
Preferably, the remote control switch is connected with controller, wireless sending module signal, the wireless sending module and nothing
Line receiving module is the high-power communication module of 433M.
Preferably, the polarity test box body is equipped with battery case, is equipped with lithium battery, the lithium in the battery case
Battery is the power supply of polarity testing box internal element.
Preferably, the controller is STM32F407ZGT6 type microcontroller.
Compared with prior art, what the utility model reached has the beneficial effect that:
A kind of polarity detector for current transformer provided by the utility model, corresponding circuit element is collected respectively
At in direct current power box and polarity testing box, avoiding the defect for needing to repeat connection line when detecting, when detection, is only needed
Current transformer is attached with direct current power box and polarity testing box respectively, quick detection can be realized, while polarity is surveyed
Examination case can remotely control unlatching/closing of direct current power box, link up without personnel, and polarity inspection only can be realized by a people
It surveys.
The adjustable resistance being arranged in direct current power box can be adjusted at any time the electric current of the first winding by current transformer
Size enables the utility model to be applicable in a variety of current transformers, and polarity testing box can be simultaneously to A, B, C tri- of current transformer
Phase polarity is detected, and the working efficiency of operator is greatly improved.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only the preferred reality of the utility model
Example is applied, it for those of ordinary skill in the art, without any creative labor, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structure chart of direct current power box provided by the embodiment of the utility model；
Fig. 2 is the tank interface schematic diagram of polarity testing box provided by the embodiment of the utility model；
Fig. 3 is a kind of polarity detector circuit diagram for current transformer provided by the embodiment of the utility model.
In figure, 1- direct current power box, 2- polarity testing box, 3- battery, 4- adjustable resistance, the first binding post of 5-, 6- refers to
Show lamp, 7- master switch, the positive and negative switching switch of 8- direct current, 9- power interface, 10- battery case, 11- high-definition display screen, 12- second
Binding post, 13- third binding post, 14- remote control switch, 15- operational amplifier, 16-A/D analog-digital converter, 17- controller, 18-
Current transformer first winding, 19- secondary winding in current transformer, the first terminal box of 20-, 21- third binding post, 22- second
Terminal box.
Specific embodiment
In order to be best understood from the utility model technology contents, specific embodiment is provided below, and practical to this in conjunction with attached drawing
It is novel to be described further.
Referring to Fig. 1 to Fig. 3, a kind of polarity detector for current transformer, including direct current power box 1 and polarity test
Case 2, the direct current power box 1 is interior to be equipped with direct-flow input circuit, the direct-flow input circuit and current transformer first winding 18
It is electrically connected, is equipped with polarity display circuit, the polarity display circuit and secondary winding in current transformer in the polarity testing box 2
19 are electrically connected, and the direct current power box 1 can provide the electric current by current transformer first winding 18, the polarity testing box 2
It is able to achieve the long-range control to direct current power box 1.
Specifically, the direct-flow input circuit include three can respectively with A, B, C phase of current transformer first winding 18
The second binding post 12, three that the first binding post 5, three of connection can connect with the N-terminal of current transformer first winding 18 respectively
The positive and negative switching switch 8 of indicator light 6, battery 3, adjustable resistance 4, direct current and master switch 7, first binding post 5, second connect
Terminal 12 is set in the first terminal box 20, the battery 3 and master switch 7, adjustable resistance 4, the first binding post 5, Current Mutual Inductance
Device first winding 18 is connected, and the N-terminal of current transformer first winding 18 is connected with the second binding post 12, is connected and composed by above-mentioned
The circuit of current transformer first winding 18, the master switch 7 are used to control the conducting of direct-flow input circuit, battery 3 first
Binding post 5 is electrically connected with current transformer first winding 18, for providing operating current to current transformer first winding 18, leads to
Cross the size of current that adjustable resistance 4 is adjustable input current transformer first winding 18, the positive and negative switching switch 8 of the direct current and institute
It is in parallel to state adjustable resistance 4, battery 3, it is described straight by the positive and negative positive-negative polarity for switching the changeable operating current of switch 8 of direct current
Wireless receiving module is additionally provided in stream power supply box 1, the wireless receiving module can control 7 unlatchings of master switch/closing, three instructions
Lamp 6 is connected with the first binding post 5 respectively, to indicate that A, B, C of the first binding post 5 are conducted situation.
Specifically, be additionally provided with power interface 9 in the direct current power box 1, the battery 3 by power interface 9 with
The electrical connection of the city 220V is charged.
Specifically, the polarity display circuit includes being connected with three with A, B, C of secondary winding in current transformer 19
21, three the 4th binding post 13, operational amplifiers being connect with the N-terminal of secondary winding in current transformer 19 of third binding post
15, A/D analog-digital converter 16, controller 17, remote control switch 14, high-definition display screen 11, wireless sending module, third binding post
21, the 4th binding post 13 is set in the second terminal box 22, is passed through by every phase secondary side current of secondary winding in current transformer 19
Third binding post 21 is successively electrical connected with operational amplifier 15, A/D analog-digital converter 16, controller 17, while controller is also
It is connect by the 4th binding post 13 with the N-terminal of secondary winding in current transformer 19, constitutes closing for secondary winding in current transformer 19
Circuit is closed, every phase secondary current signal is amplified by operational amplifier 15, and carry out analog-to-digital conversion through A/D analog-digital converter 16,
Finally being transmitted to controller 17 judges CT no-load voltage ratio, polarity and circuit on-off, phase sequence etc., acquired current transformer three-phase pole
Property can be shown on high-definition display screen 11, and operator is facilitated to record.
Specifically, the remote control switch 14 is with controller 17, wireless sending module, successively signal is connected, the wireless transmission
Module and wireless receiving module are the high-power communication module of 433M, and operator presses the remote control on polarity testing box 2
After switch 14, on-off model is transmitted to wirelessly connecing in direct current power box 1 by wireless sending module by controller 17
Module is received, to open the master switch 7 of direct current power box 1, operator can realize the long-range control to 1 on-off of direct current power box
System.
Specifically, used controller 17 is STM32F407ZGT6 type microcontroller.
Specifically, used operational amplifier 15 is that LT1007CS8 type operational amplifier or OPA552UA type operation are put
Big device.
Specifically, used A/D analog-digital converter 16 is STM32F429 type analog-to-digital converter.
Specifically, 2 cabinet of polarity testing box is equipped with battery case 10, lithium battery is installed in the battery case 10,
The lithium battery is the power supply of 2 internal element of polarity testing box, can take out lithium battery when not used, lithium battery is avoided to put for a long time
It sets in battery case 10 and gets rusty because of humidity, influence the normal use of polarity testing box 2.
Working principle are as follows: in use, by A, B, C phase of current transformer first winding 18 respectively with direct current power box 1
First binding post 5 be connected, by the N-terminal of current transformer first winding 18 respectively with 12 phase of the second binding post of direct current power box 1
Even, the complete loops of a current transformer first winding 18 are constituted, A, B, C phase of secondary winding in current transformer 19 are distinguished
It is connected with the third binding post 21 of polarity testing box 2, by the three-phase N-terminal of secondary winding in current transformer 19 and polarity testing box 2
The 4th binding post 13 connection, constitute the complete loops of a secondary winding in current transformer 19, manually open master switch 7 or
By the 14 Remote Open master switch 7 of remote control switch being located on polarity testing box 2, direct-flow input circuit is connected, is by battery 3
Current transformer first winding 18 provides operating current, and the size of operating current is adjusted by adjustable resistance 4, by current transformer
The operating current of first winding 18 can get the secondary side current of secondary winding in current transformer 19, and the every phase current of secondary side is logical
It crosses the second binding post 12 to be successively electrically connected with operational amplifier 15, A/D analog-digital converter 16, controller 17 respectively, makes to control
Device 17 can judge Current Transmit no-load voltage ratio, every phase polarity and circuit on-off, phase sequence, and acquired data are shown in high definition
It is shown in display screen 11, operator is facilitated to check.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent substitution, improvement and etc. done should be included in the utility model
Within the scope of protection.
Claims (8)
1. a kind of polarity detector for current transformer, which is characterized in that including direct current power box and polarity testing box, institute
It states and is equipped with direct-flow input circuit in direct current power box, the direct-flow input circuit is connected with current transformer first winding, described
Polarity display circuit is equipped in polarity testing box, the polarity display circuit is connected with secondary winding in current transformer, described straight
Stream power supply box can provide the electric current by current transformer first winding, and the polarity testing box is able to achieve to direct current power box
Long-range control.
2. a kind of polarity detector for current transformer according to claim 1, which is characterized in that the direct current is defeated
Enter circuit include several the first binding posts being connect with current transformer first winding input terminal, it is several primary with current transformer
The positive and negative switching switch of the second binding post, several indicator lights, battery, adjustable resistance, the direct current of winding output end connection and always
Switch, the battery are connected with master switch, adjustable resistance, the first binding post, first binding post and current transformer one
Secondary winding is electrically connected, and the positive and negative switching switch of direct current is in parallel with the adjustable resistance, battery, in the direct current power box also
Equipped with wireless receiving module, the wireless receiving module can control master switch unlatching/closing.
3. a kind of polarity detector for current transformer according to claim 2, which is characterized in that the direct current
Source case is equipped with power interface, and the battery is charged by power interface.
4. a kind of polarity detector for current transformer according to claim 2, which is characterized in that the polarity is aobvious
Show that circuit includes and several third binding posts connecting with secondary winding in current transformer input terminal, several and current transformer two
4th binding post of secondary winding input terminal connection, operational amplifier, A/D analog-digital converter, controller, remote control switch, high definition are aobvious
Display screen, wireless sending module, second binding post and operational amplifier, A/D analog-digital converter, controller successively electrical phase
Even, the controller is connected with high-definition display screen signal.
5. a kind of polarity detector for current transformer according to claim 4, which is characterized in that described first connects
Terminal, the second binding post are set in the first terminal box, and the third binding post, the 4th binding post are set in the second terminal box, the
One binding post is connected with A, B, C of current transformer first winding respectively, second binding post respectively with current transformer
The N-terminal of first winding connects, and the third binding post is connected with A, B, C of secondary winding in current transformer respectively, and described the
Four binding posts are connect with the N-terminal of secondary winding in current transformer respectively.
6. a kind of polarity detector for current transformer according to claim 4, which is characterized in that the remote control is opened
Pass is connected with controller, wireless sending module signal, and the wireless sending module is 433M high-power with wireless receiving module
Communication module.
7. a kind of polarity detector for current transformer according to claim 4, which is characterized in that the polarity is surveyed
It tries box body and is equipped with battery case, lithium battery is installed in the battery case, the lithium battery is polarity testing box internal element
Power supply.
8. a kind of polarity detector for current transformer according to claim 4, which is characterized in that the controller
For STM32F407ZGT6 type microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821569225.9U CN209248005U (en) | 2018-09-29 | 2018-09-29 | A kind of polarity detector for current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821569225.9U CN209248005U (en) | 2018-09-29 | 2018-09-29 | A kind of polarity detector for current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209248005U true CN209248005U (en) | 2019-08-13 |
Family
ID=67518380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821569225.9U Active CN209248005U (en) | 2018-09-29 | 2018-09-29 | A kind of polarity detector for current transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN209248005U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609203A (en) * | 2019-10-30 | 2019-12-24 | 中国南方电网有限责任公司超高压输电公司南宁局 | CT polarity detector and detection method thereof |
| 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 |
| CN110824407A (en) * | 2019-11-21 | 2020-02-21 | 上海方融科技有限责任公司 | High-precision current mutual inductance self-adjustment detection device |
| CN114675223A (en) * | 2022-02-22 | 2022-06-28 | 内蒙古送变电有限责任公司 | Portable chargeable type remote control polarity tester for current transformer |
| RU213194U1 (en) * | 2021-10-08 | 2022-08-30 | Общество с ограниченной ответственностью "Газпром трансгаз Ухта" | DEVICE FOR DIAGNOSTICS OF CONVERTERS OF INPUT DIGITAL CODE TO OUTPUT ANALOGUE CURRENT OR VOLTAGE SIGNALS |
-
2018
- 2018-09-29 CN CN201821569225.9U patent/CN209248005U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609203A (en) * | 2019-10-30 | 2019-12-24 | 中国南方电网有限责任公司超高压输电公司南宁局 | CT polarity detector and detection method thereof |
| CN110824407A (en) * | 2019-11-21 | 2020-02-21 | 上海方融科技有限责任公司 | High-precision current mutual inductance self-adjustment detection device |
| CN110824407B (en) * | 2019-11-21 | 2021-11-23 | 上海方融科技有限责任公司 | High-precision current mutual inductance self-adjustment detection device |
| 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 |
| RU213194U1 (en) * | 2021-10-08 | 2022-08-30 | Общество с ограниченной ответственностью "Газпром трансгаз Ухта" | DEVICE FOR DIAGNOSTICS OF CONVERTERS OF INPUT DIGITAL CODE TO OUTPUT ANALOGUE CURRENT OR VOLTAGE SIGNALS |
| CN114675223A (en) * | 2022-02-22 | 2022-06-28 | 内蒙古送变电有限责任公司 | Portable chargeable type remote control polarity tester for current transformer |
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